diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.c | 1115 |
1 files changed, 10 insertions, 1105 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c index 41f0de914008..1b20c4fb791b 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans.c @@ -60,1113 +60,18 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ -#include "iwl-dev.h" -#include "iwl-trans.h" -#include "iwl-core.h" -#include "iwl-helpers.h" -#include "iwl-trans-int-pcie.h" -/*TODO remove uneeded includes when the transport layer tx_free will be here */ -#include "iwl-agn.h" -#include "iwl-core.h" - -static int iwl_trans_rx_alloc(struct iwl_priv *priv) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - struct device *dev = priv->bus->dev; - - memset(&priv->rxq, 0, sizeof(priv->rxq)); - - spin_lock_init(&rxq->lock); - INIT_LIST_HEAD(&rxq->rx_free); - INIT_LIST_HEAD(&rxq->rx_used); - - if (WARN_ON(rxq->bd || rxq->rb_stts)) - return -EINVAL; - - /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */ - rxq->bd = dma_alloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, - &rxq->bd_dma, GFP_KERNEL); - if (!rxq->bd) - goto err_bd; - memset(rxq->bd, 0, sizeof(__le32) * RX_QUEUE_SIZE); - - /*Allocate the driver's pointer to receive buffer status */ - rxq->rb_stts = dma_alloc_coherent(dev, sizeof(*rxq->rb_stts), - &rxq->rb_stts_dma, GFP_KERNEL); - if (!rxq->rb_stts) - goto err_rb_stts; - memset(rxq->rb_stts, 0, sizeof(*rxq->rb_stts)); - - return 0; - -err_rb_stts: - dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, - rxq->bd, rxq->bd_dma); - memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); - rxq->bd = NULL; -err_bd: - return -ENOMEM; -} - -static void iwl_trans_rxq_free_rx_bufs(struct iwl_priv *priv) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - int i; - - /* Fill the rx_used queue with _all_ of the Rx buffers */ - for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { - /* In the reset function, these buffers may have been allocated - * to an SKB, so we need to unmap and free potential storage */ - if (rxq->pool[i].page != NULL) { - dma_unmap_page(priv->bus->dev, rxq->pool[i].page_dma, - PAGE_SIZE << priv->hw_params.rx_page_order, - DMA_FROM_DEVICE); - __iwl_free_pages(priv, rxq->pool[i].page); - rxq->pool[i].page = NULL; - } - list_add_tail(&rxq->pool[i].list, &rxq->rx_used); - } -} - -static void iwl_trans_rx_hw_init(struct iwl_priv *priv, - struct iwl_rx_queue *rxq) -{ - u32 rb_size; - const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ - u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */ - - rb_timeout = RX_RB_TIMEOUT; - - if (iwlagn_mod_params.amsdu_size_8K) - rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; - else - rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; - - /* Stop Rx DMA */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); - - /* Reset driver's Rx queue write index */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); - - /* Tell device where to find RBD circular buffer in DRAM */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, - (u32)(rxq->bd_dma >> 8)); - - /* Tell device where in DRAM to update its Rx status */ - iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, - rxq->rb_stts_dma >> 4); - - /* Enable Rx DMA - * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in - * the credit mechanism in 5000 HW RX FIFO - * Direct rx interrupts to hosts - * Rx buffer size 4 or 8k - * RB timeout 0x10 - * 256 RBDs - */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, - FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | - FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY | - FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | - FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | - rb_size| - (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)| - (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); - - /* Set interrupt coalescing timer to default (2048 usecs) */ - iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); -} - -static int iwl_rx_init(struct iwl_priv *priv) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - int i, err; - unsigned long flags; - - if (!rxq->bd) { - err = iwl_trans_rx_alloc(priv); - if (err) - return err; - } - - spin_lock_irqsave(&rxq->lock, flags); - INIT_LIST_HEAD(&rxq->rx_free); - INIT_LIST_HEAD(&rxq->rx_used); - - iwl_trans_rxq_free_rx_bufs(priv); - - for (i = 0; i < RX_QUEUE_SIZE; i++) - rxq->queue[i] = NULL; - - /* Set us so that we have processed and used all buffers, but have - * not restocked the Rx queue with fresh buffers */ - rxq->read = rxq->write = 0; - rxq->write_actual = 0; - rxq->free_count = 0; - spin_unlock_irqrestore(&rxq->lock, flags); - - iwlagn_rx_replenish(priv); - - iwl_trans_rx_hw_init(priv, rxq); - - spin_lock_irqsave(&priv->lock, flags); - rxq->need_update = 1; - iwl_rx_queue_update_write_ptr(priv, rxq); - spin_unlock_irqrestore(&priv->lock, flags); - - return 0; -} - -static void iwl_trans_rx_free(struct iwl_priv *priv) -{ - struct iwl_rx_queue *rxq = &priv->rxq; - unsigned long flags; - - /*if rxq->bd is NULL, it means that nothing has been allocated, - * exit now */ - if (!rxq->bd) { - IWL_DEBUG_INFO(priv, "Free NULL rx context\n"); - return; - } - - spin_lock_irqsave(&rxq->lock, flags); - iwl_trans_rxq_free_rx_bufs(priv); - spin_unlock_irqrestore(&rxq->lock, flags); - - dma_free_coherent(priv->bus->dev, sizeof(__le32) * RX_QUEUE_SIZE, - rxq->bd, rxq->bd_dma); - memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); - rxq->bd = NULL; - - if (rxq->rb_stts) - dma_free_coherent(priv->bus->dev, - sizeof(struct iwl_rb_status), - rxq->rb_stts, rxq->rb_stts_dma); - else - IWL_DEBUG_INFO(priv, "Free rxq->rb_stts which is NULL\n"); - memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma)); - rxq->rb_stts = NULL; -} - -static int iwl_trans_rx_stop(struct iwl_priv *priv) -{ - - /* stop Rx DMA */ - iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); - return iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, - FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); -} - -static inline int iwlagn_alloc_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr, size_t size) -{ - if (WARN_ON(ptr->addr)) - return -EINVAL; - - ptr->addr = dma_alloc_coherent(priv->bus->dev, size, - &ptr->dma, GFP_KERNEL); - if (!ptr->addr) - return -ENOMEM; - ptr->size = size; - return 0; -} - -static inline void iwlagn_free_dma_ptr(struct iwl_priv *priv, - struct iwl_dma_ptr *ptr) -{ - if (unlikely(!ptr->addr)) - return; - - dma_free_coherent(priv->bus->dev, ptr->size, ptr->addr, ptr->dma); - memset(ptr, 0, sizeof(*ptr)); -} - -static int iwl_trans_txq_alloc(struct iwl_priv *priv, struct iwl_tx_queue *txq, - int slots_num, u32 txq_id) -{ - size_t tfd_sz = priv->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX; - int i; - - if (WARN_ON(txq->meta || txq->cmd || txq->txb || txq->tfds)) - return -EINVAL; - - txq->q.n_window = slots_num; - - txq->meta = kzalloc(sizeof(txq->meta[0]) * slots_num, - GFP_KERNEL); - txq->cmd = kzalloc(sizeof(txq->cmd[0]) * slots_num, - GFP_KERNEL); - - if (!txq->meta || !txq->cmd) - goto error; - - for (i = 0; i < slots_num; i++) { - txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd), - GFP_KERNEL); - if (!txq->cmd[i]) - goto error; - } - - /* Alloc driver data array and TFD circular buffer */ - /* Driver private data, only for Tx (not command) queues, - * not shared with device. */ - if (txq_id != priv->cmd_queue) { - txq->txb = kzalloc(sizeof(txq->txb[0]) * - TFD_QUEUE_SIZE_MAX, GFP_KERNEL); - if (!txq->txb) { - IWL_ERR(priv, "kmalloc for auxiliary BD " - "structures failed\n"); - goto error; - } - } else { - txq->txb = NULL; - } - - /* Circular buffer of transmit frame descriptors (TFDs), - * shared with device */ - txq->tfds = dma_alloc_coherent(priv->bus->dev, tfd_sz, &txq->q.dma_addr, - GFP_KERNEL); - if (!txq->tfds) { - IWL_ERR(priv, "dma_alloc_coherent(%zd) failed\n", tfd_sz); - goto error; - } - txq->q.id = txq_id; - - return 0; -error: - kfree(txq->txb); - txq->txb = NULL; - /* since txq->cmd has been zeroed, - * all non allocated cmd[i] will be NULL */ - if (txq->cmd) - for (i = 0; i < slots_num; i++) - kfree(txq->cmd[i]); - kfree(txq->meta); - kfree(txq->cmd); - txq->meta = NULL; - txq->cmd = NULL; - - return -ENOMEM; - -} - -static int iwl_trans_txq_init(struct iwl_priv *priv, struct iwl_tx_queue *txq, - int slots_num, u32 txq_id) -{ - int ret; - - txq->need_update = 0; - memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num); - - /* - * For the default queues 0-3, set up the swq_id - * already -- all others need to get one later - * (if they need one at all). - */ - if (txq_id < 4) - iwl_set_swq_id(txq, txq_id, txq_id); - - /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise - * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ - BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); - - /* Initialize queue's high/low-water marks, and head/tail indexes */ - ret = iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, - txq_id); - if (ret) - return ret; - - /* - * Tell nic where to find circular buffer of Tx Frame Descriptors for - * given Tx queue, and enable the DMA channel used for that queue. - * Circular buffer (TFD queue in DRAM) physical base address */ - iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id), - txq->q.dma_addr >> 8); - - return 0; -} - -/** - * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's - */ -static void iwl_tx_queue_unmap(struct iwl_priv *priv, int txq_id) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - - if (!q->n_bd) - return; - - while (q->write_ptr != q->read_ptr) { - /* The read_ptr needs to bound by q->n_window */ - iwlagn_txq_free_tfd(priv, txq, get_cmd_index(q, q->read_ptr)); - q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd); - } -} - -/** - * iwl_tx_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -static void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct device *dev = priv->bus->dev; - int i; - if (WARN_ON(!txq)) - return; - - iwl_tx_queue_unmap(priv, txq_id); - - /* De-alloc array of command/tx buffers */ - for (i = 0; i < txq->q.n_window; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) { - dma_free_coherent(dev, priv->hw_params.tfd_size * - txq->q.n_bd, txq->tfds, txq->q.dma_addr); - memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr)); - } - - /* De-alloc array of per-TFD driver data */ - kfree(txq->txb); - txq->txb = NULL; - - /* deallocate arrays */ - kfree(txq->cmd); - kfree(txq->meta); - txq->cmd = NULL; - txq->meta = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} - -/** - * iwl_trans_tx_free - Free TXQ Context - * - * Destroy all TX DMA queues and structures - */ -static void iwl_trans_tx_free(struct iwl_priv *priv) -{ - int txq_id; - - /* Tx queues */ - if (priv->txq) { - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - iwl_tx_queue_free(priv, txq_id); - } - - kfree(priv->txq); - priv->txq = NULL; - - iwlagn_free_dma_ptr(priv, &priv->kw); - - iwlagn_free_dma_ptr(priv, &priv->scd_bc_tbls); -} - -/** - * iwl_trans_tx_alloc - allocate TX context - * Allocate all Tx DMA structures and initialize them - * - * @param priv - * @return error code - */ -static int iwl_trans_tx_alloc(struct iwl_priv *priv) -{ - int ret; - int txq_id, slots_num; - - /*It is not allowed to alloc twice, so warn when this happens. - * We cannot rely on the previous allocation, so free and fail */ - if (WARN_ON(priv->txq)) { - ret = -EINVAL; - goto error; - } - - ret = iwlagn_alloc_dma_ptr(priv, &priv->scd_bc_tbls, - priv->hw_params.scd_bc_tbls_size); - if (ret) { - IWL_ERR(priv, "Scheduler BC Table allocation failed\n"); - goto error; - } - - /* Alloc keep-warm buffer */ - ret = iwlagn_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE); - if (ret) { - IWL_ERR(priv, "Keep Warm allocation failed\n"); - goto error; - } - - priv->txq = kzalloc(sizeof(struct iwl_tx_queue) * - priv->cfg->base_params->num_of_queues, GFP_KERNEL); - if (!priv->txq) { - IWL_ERR(priv, "Not enough memory for txq\n"); - ret = ENOMEM; - goto error; - } - - /* Alloc and init all Tx queues, including the command queue (#4/#9) */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { - slots_num = (txq_id == priv->cmd_queue) ? - TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; - ret = iwl_trans_txq_alloc(priv, &priv->txq[txq_id], slots_num, - txq_id); - if (ret) { - IWL_ERR(priv, "Tx %d queue alloc failed\n", txq_id); - goto error; - } - } - - return 0; - -error: - trans_tx_free(&priv->trans); - - return ret; -} -static int iwl_tx_init(struct iwl_priv *priv) -{ - int ret; - int txq_id, slots_num; - unsigned long flags; - bool alloc = false; - - if (!priv->txq) { - ret = iwl_trans_tx_alloc(priv); - if (ret) - goto error; - alloc = true; - } - - spin_lock_irqsave(&priv->lock, flags); - - /* Turn off all Tx DMA fifos */ - iwl_write_prph(priv, SCD_TXFACT, 0); - - /* Tell NIC where to find the "keep warm" buffer */ - iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4); - - spin_unlock_irqrestore(&priv->lock, flags); - - /* Alloc and init all Tx queues, including the command queue (#4/#9) */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) { - slots_num = (txq_id == priv->cmd_queue) ? - TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; - ret = iwl_trans_txq_init(priv, &priv->txq[txq_id], slots_num, - txq_id); - if (ret) { - IWL_ERR(priv, "Tx %d queue init failed\n", txq_id); - goto error; - } - } - - return 0; -error: - /*Upon error, free only if we allocated something */ - if (alloc) - trans_tx_free(&priv->trans); - return ret; -} - -static void iwl_set_pwr_vmain(struct iwl_priv *priv) -{ -/* - * (for documentation purposes) - * to set power to V_AUX, do: - - if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) - iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, - APMG_PS_CTRL_VAL_PWR_SRC_VAUX, - ~APMG_PS_CTRL_MSK_PWR_SRC); - */ - - iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, - APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, - ~APMG_PS_CTRL_MSK_PWR_SRC); -} - -static int iwl_nic_init(struct iwl_priv *priv) -{ - unsigned long flags; - - /* nic_init */ - spin_lock_irqsave(&priv->lock, flags); - iwl_apm_init(priv); - - /* Set interrupt coalescing calibration timer to default (512 usecs) */ - iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); - - spin_unlock_irqrestore(&priv->lock, flags); - iwl_set_pwr_vmain(priv); - - priv->cfg->lib->nic_config(priv); - - /* Allocate the RX queue, or reset if it is already allocated */ - iwl_rx_init(priv); - - /* Allocate or reset and init all Tx and Command queues */ - if (iwl_tx_init(priv)) - return -ENOMEM; - - if (priv->cfg->base_params->shadow_reg_enable) { - /* enable shadow regs in HW */ - iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL, - 0x800FFFFF); - } - - set_bit(STATUS_INIT, &priv->status); - - return 0; -} - -#define HW_READY_TIMEOUT (50) - -/* Note: returns poll_bit return value, which is >= 0 if success */ -static int iwl_set_hw_ready(struct iwl_priv *priv) -{ - int ret; - - 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); - - IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : ""); - return ret; -} - -/* Note: returns standard 0/-ERROR code */ -static int iwl_trans_prepare_card_hw(struct iwl_priv *priv) -{ - int ret; - - IWL_DEBUG_INFO(priv, "iwl_trans_prepare_card_hw enter\n"); - - ret = iwl_set_hw_ready(priv); - if (ret >= 0) - return 0; - - /* If HW is not ready, prepare the conditions to check again */ - 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 < 0) - return ret; - - /* HW should be ready by now, check again. */ - ret = iwl_set_hw_ready(priv); - if (ret >= 0) - return 0; - return ret; -} - -static int iwl_trans_start_device(struct iwl_priv *priv) -{ - int ret; - - priv->ucode_owner = IWL_OWNERSHIP_DRIVER; - - if ((priv->cfg->sku & EEPROM_SKU_CAP_AMT_ENABLE) && - iwl_trans_prepare_card_hw(priv)) { - 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); - else - set_bit(STATUS_RF_KILL_HW, &priv->status); - - if (iwl_is_rfkill(priv)) { - wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); - iwl_enable_interrupts(priv); - return -ERFKILL; - } - - iwl_write32(priv, CSR_INT, 0xFFFFFFFF); - - ret = iwl_nic_init(priv); - if (ret) { - IWL_ERR(priv, "Unable to init nic\n"); - return ret; - } - - /* make sure rfkill handshake bits are cleared */ - iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, - CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); - - /* clear (again), then enable host interrupts */ - iwl_write32(priv, CSR_INT, 0xFFFFFFFF); - iwl_enable_interrupts(priv); - - /* really make sure rfkill handshake bits are cleared */ - iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); - - return 0; -} - -/* - * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask - * must be called under priv->lock and mac access - */ -static void iwl_trans_txq_set_sched(struct iwl_priv *priv, u32 mask) -{ - iwl_write_prph(priv, SCD_TXFACT, mask); -} - -#define IWL_AC_UNSET -1 - -struct queue_to_fifo_ac { - s8 fifo, ac; -}; - -static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = { - { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, - { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, - { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, - { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, - { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, - { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, - { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, - { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, - { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, - { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, -}; - -static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = { - { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, - { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, - { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, - { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, - { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, }, - { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, }, - { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, }, - { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, }, - { IWL_TX_FIFO_BE_IPAN, 2, }, - { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, -}; -static void iwl_trans_tx_start(struct iwl_priv *priv) -{ - const struct queue_to_fifo_ac *queue_to_fifo; - struct iwl_rxon_context *ctx; - u32 a; - unsigned long flags; - int i, chan; - u32 reg_val; - - spin_lock_irqsave(&priv->lock, flags); - - priv->scd_base_addr = iwl_read_prph(priv, SCD_SRAM_BASE_ADDR); - a = priv->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND; - /* reset conext data memory */ - for (; a < priv->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND; - a += 4) - iwl_write_targ_mem(priv, a, 0); - /* reset tx status memory */ - for (; a < priv->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND; - a += 4) - iwl_write_targ_mem(priv, a, 0); - for (; a < priv->scd_base_addr + - SCD_TRANS_TBL_OFFSET_QUEUE(priv->hw_params.max_txq_num); a += 4) - iwl_write_targ_mem(priv, a, 0); - - iwl_write_prph(priv, SCD_DRAM_BASE_ADDR, - priv->scd_bc_tbls.dma >> 10); - - /* Enable DMA channel */ - for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++) - iwl_write_direct32(priv, 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 = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG); - iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG, - reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); - - iwl_write_prph(priv, SCD_QUEUECHAIN_SEL, - SCD_QUEUECHAIN_SEL_ALL(priv)); - iwl_write_prph(priv, SCD_AGGR_SEL, 0); - - /* initiate the queues */ - for (i = 0; i < priv->hw_params.max_txq_num; i++) { - iwl_write_prph(priv, SCD_QUEUE_RDPTR(i), 0); - iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8)); - iwl_write_targ_mem(priv, priv->scd_base_addr + - SCD_CONTEXT_QUEUE_OFFSET(i), 0); - iwl_write_targ_mem(priv, priv->scd_base_addr + - SCD_CONTEXT_QUEUE_OFFSET(i) + - sizeof(u32), - ((SCD_WIN_SIZE << - SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & - SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | - ((SCD_FRAME_LIMIT << - SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & - SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); - } - - iwl_write_prph(priv, SCD_INTERRUPT_MASK, - IWL_MASK(0, priv->hw_params.max_txq_num)); - - /* Activate all Tx DMA/FIFO channels */ - iwl_trans_txq_set_sched(priv, IWL_MASK(0, 7)); - - /* map queues to FIFOs */ - if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)) - queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo; - else - queue_to_fifo = iwlagn_default_queue_to_tx_fifo; - - iwl_trans_set_wr_ptrs(priv, priv->cmd_queue, 0); - - /* make sure all queue are not stopped */ - memset(&priv->queue_stopped[0], 0, sizeof(priv->queue_stopped)); - for (i = 0; i < 4; i++) - atomic_set(&priv->queue_stop_count[i], 0); - for_each_context(priv, ctx) - ctx->last_tx_rejected = false; - - /* reset to 0 to enable all the queue first */ - priv->txq_ctx_active_msk = 0; - - BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) != 10); - BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) != 10); - - for (i = 0; i < 10; i++) { - int fifo = queue_to_fifo[i].fifo; - int ac = queue_to_fifo[i].ac; - - iwl_txq_ctx_activate(priv, i); - - if (fifo == IWL_TX_FIFO_UNUSED) - continue; - - if (ac != IWL_AC_UNSET) - iwl_set_swq_id(&priv->txq[i], ac, i); - iwl_trans_tx_queue_set_status(priv, &priv->txq[i], fifo, 0); - } - - spin_unlock_irqrestore(&priv->lock, flags); - - /* Enable L1-Active */ - iwl_clear_bits_prph(priv, APMG_PCIDEV_STT_REG, - APMG_PCIDEV_STT_VAL_L1_ACT_DIS); -} - -/** - * iwlagn_txq_ctx_stop - Stop all Tx DMA channels - */ -static int iwl_trans_tx_stop(struct iwl_priv *priv) -{ - int ch, txq_id; - unsigned long flags; - - /* Turn off all Tx DMA fifos */ - spin_lock_irqsave(&priv->lock, flags); - - iwl_trans_txq_set_sched(priv, 0); - - /* Stop each Tx DMA channel, and wait for it to be idle */ - for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) { - iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); - if (iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, - FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), - 1000)) - IWL_ERR(priv, "Failing on timeout while stopping" - " DMA channel %d [0x%08x]", ch, - iwl_read_direct32(priv, FH_TSSR_TX_STATUS_REG)); - } - spin_unlock_irqrestore(&priv->lock, flags); - - if (!priv->txq) { - IWL_WARN(priv, "Stopping tx queues that aren't allocated..."); - return 0; - } - - /* Unmap DMA from host system and free skb's */ - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - iwl_tx_queue_unmap(priv, txq_id); - - return 0; -} - -static void iwl_trans_stop_device(struct iwl_priv *priv) -{ - unsigned long flags; - - /* stop and reset the on-board processor */ - iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); - - /* tell the device to stop sending interrupts */ - spin_lock_irqsave(&priv->lock, flags); - iwl_disable_interrupts(priv); - spin_unlock_irqrestore(&priv->lock, flags); - trans_sync_irq(&priv->trans); - - /* device going down, Stop using ICT table */ - iwl_disable_ict(priv); - - /* - * If a HW restart happens during firmware loading, - * then the firmware loading might call this function - * and later it might be called again due to the - * restart. So don't process again if the device is - * already dead. - */ - if (test_bit(STATUS_DEVICE_ENABLED, &priv->status)) { - iwl_trans_tx_stop(priv); - iwl_trans_rx_stop(priv); - - /* Power-down device's busmaster DMA clocks */ - iwl_write_prph(priv, APMG_CLK_DIS_REG, - APMG_CLK_VAL_DMA_CLK_RQT); - udelay(5); - } - - /* Make sure (redundant) we've released our request to stay awake */ - iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - - /* Stop the device, and put it in low power state */ - iwl_apm_stop(priv); -} - -static struct iwl_tx_cmd *iwl_trans_get_tx_cmd(struct iwl_priv *priv, - int txq_id) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - struct iwl_device_cmd *dev_cmd; - - if (unlikely(iwl_queue_space(q) < q->high_mark)) - return NULL; - - /* - * Set up the Tx-command (not MAC!) header. - * Store the chosen Tx queue and TFD index within the sequence field; - * after Tx, uCode's Tx response will return this value so driver can - * locate the frame within the tx queue and do post-tx processing. - */ - dev_cmd = txq->cmd[q->write_ptr]; - memset(dev_cmd, 0, sizeof(*dev_cmd)); - dev_cmd->hdr.cmd = REPLY_TX; - dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | - INDEX_TO_SEQ(q->write_ptr))); - return &dev_cmd->cmd.tx; -} - -static int iwl_trans_tx(struct iwl_priv *priv, struct sk_buff *skb, - struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu, - struct iwl_rxon_context *ctx) -{ - struct iwl_tx_queue *txq = &priv->txq[txq_id]; - struct iwl_queue *q = &txq->q; - struct iwl_device_cmd *dev_cmd = txq->cmd[q->write_ptr]; - struct iwl_cmd_meta *out_meta; - - dma_addr_t phys_addr = 0; - dma_addr_t txcmd_phys; - dma_addr_t scratch_phys; - u16 len, firstlen, secondlen; - u8 wait_write_ptr = 0; - u8 hdr_len = ieee80211_hdrlen(fc); - - /* Set up driver data for this TFD */ - memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); - txq->txb[q->write_ptr].skb = skb; - txq->txb[q->write_ptr].ctx = ctx; - - /* Set up first empty entry in queue's array of Tx/cmd buffers */ - out_meta = &txq->meta[q->write_ptr]; - - /* - * Use the first empty entry in this queue's command buffer array - * to contain the Tx command and MAC header concatenated together - * (payload data will be in another buffer). - * Size of this varies, due to varying MAC header length. - * If end is not dword aligned, we'll have 2 extra bytes at the end - * of the MAC header (device reads on dword boundaries). - * We'll tell device about this padding later. - */ - len = sizeof(struct iwl_tx_cmd) + - sizeof(struct iwl_cmd_header) + hdr_len; - firstlen = (len + 3) & ~3; - - /* Tell NIC about any 2-byte padding after MAC header */ - if (firstlen != len) - tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; - - /* Physical address of this Tx command's header (not MAC header!), - * within command buffer array. */ - txcmd_phys = dma_map_single(priv->bus->dev, - &dev_cmd->hdr, firstlen, - DMA_BIDIRECTIONAL); - if (unlikely(dma_mapping_error(priv->bus->dev, txcmd_phys))) - return -1; - dma_unmap_addr_set(out_meta, mapping, txcmd_phys); - dma_unmap_len_set(out_meta, len, firstlen); - - if (!ieee80211_has_morefrags(fc)) { - txq->need_update = 1; - } else { - wait_write_ptr = 1; - txq->need_update = 0; - } - - /* Set up TFD's 2nd entry to point directly to remainder of skb, - * if any (802.11 null frames have no payload). */ - secondlen = skb->len - hdr_len; - if (secondlen > 0) { - phys_addr = dma_map_single(priv->bus->dev, skb->data + hdr_len, - secondlen, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(priv->bus->dev, phys_addr))) { - dma_unmap_single(priv->bus->dev, - dma_unmap_addr(out_meta, mapping), - dma_unmap_len(out_meta, len), - DMA_BIDIRECTIONAL); - return -1; - } - } - - /* Attach buffers to TFD */ - iwlagn_txq_attach_buf_to_tfd(priv, txq, txcmd_phys, firstlen, 1); - if (secondlen > 0) - iwlagn_txq_attach_buf_to_tfd(priv, txq, phys_addr, - secondlen, 0); - - scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + - offsetof(struct iwl_tx_cmd, scratch); - - /* take back ownership of DMA buffer to enable update */ - dma_sync_single_for_cpu(priv->bus->dev, txcmd_phys, firstlen, - DMA_BIDIRECTIONAL); - tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); - tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); - - IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n", - le16_to_cpu(dev_cmd->hdr.sequence)); - IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); - iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); - - /* Set up entry for this TFD in Tx byte-count array */ - if (ampdu) - iwl_trans_txq_update_byte_cnt_tbl(priv, txq, - le16_to_cpu(tx_cmd->len)); - - dma_sync_single_for_device(priv->bus->dev, txcmd_phys, firstlen, - DMA_BIDIRECTIONAL); - - trace_iwlwifi_dev_tx(priv, - &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr], - sizeof(struct iwl_tfd), - &dev_cmd->hdr, firstlen, - skb->data + hdr_len, secondlen); - - /* Tell device the write index *just past* this latest filled TFD */ - q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); - iwl_txq_update_write_ptr(priv, txq); - - /* - * At this point the frame is "transmitted" successfully - * and we will get a TX status notification eventually, - * regardless of the value of ret. "ret" only indicates - * whether or not we should update the write pointer. - */ - if ((iwl_queue_space(q) < q->high_mark) && priv->mac80211_registered) { - if (wait_write_ptr) { - txq->need_update = 1; - iwl_txq_update_write_ptr(priv, txq); - } else { - iwl_stop_queue(priv, txq); - } - } - return 0; -} - -static void iwl_trans_kick_nic(struct iwl_priv *priv) -{ - /* Remove all resets to allow NIC to operate */ - iwl_write32(priv, CSR_RESET, 0); -} - -static void iwl_trans_sync_irq(struct iwl_priv *priv) -{ - /* wait to make sure we flush pending tasklet*/ - synchronize_irq(priv->bus->irq); - tasklet_kill(&priv->irq_tasklet); -} - -static void iwl_trans_free(struct iwl_priv *priv) -{ - free_irq(priv->bus->irq, priv); - iwl_free_isr_ict(priv); -} - -static const struct iwl_trans_ops trans_ops = { - .start_device = iwl_trans_start_device, - .prepare_card_hw = iwl_trans_prepare_card_hw, - .stop_device = iwl_trans_stop_device, - - .tx_start = iwl_trans_tx_start, - - .rx_free = iwl_trans_rx_free, - .tx_free = iwl_trans_tx_free, - - .send_cmd = iwl_send_cmd, - .send_cmd_pdu = iwl_send_cmd_pdu, - - .get_tx_cmd = iwl_trans_get_tx_cmd, - .tx = iwl_trans_tx, - - .txq_agg_disable = iwl_trans_txq_agg_disable, - .txq_agg_setup = iwl_trans_txq_agg_setup, - - .kick_nic = iwl_trans_kick_nic, - - .sync_irq = iwl_trans_sync_irq, - .free = iwl_trans_free, -}; +#include "iwl-trans.h" -int iwl_trans_register(struct iwl_trans *trans, struct iwl_priv *priv) +int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id, + u32 flags, u16 len, const void *data) { - int err; - - priv->trans.ops = &trans_ops; - priv->trans.priv = priv; - - tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) - iwl_irq_tasklet, (unsigned long)priv); - - iwl_alloc_isr_ict(priv); - - err = request_irq(priv->bus->irq, iwl_isr_ict, IRQF_SHARED, - DRV_NAME, priv); - if (err) { - IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus->irq); - iwl_free_isr_ict(priv); - return err; - } - - INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish); + struct iwl_host_cmd cmd = { + .id = id, + .len = { len, }, + .data = { data, }, + .flags = flags, + }; - return 0; + return iwl_trans_send_cmd(trans, &cmd); } |