/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved. * * 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.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #include #include #include #include #include "iwl-trans.h" #include "iwl-trans-pcie-int.h" #include "iwl-csr.h" #include "iwl-prph.h" #include "iwl-shared.h" #include "iwl-eeprom.h" #include "iwl-agn-hw.h" static int iwl_trans_rx_alloc(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_queue *rxq = &trans_pcie->rxq; struct device *dev = bus(trans)->dev; memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->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_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_queue *rxq = &trans_pcie->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(bus(trans)->dev, rxq->pool[i].page_dma, PAGE_SIZE << hw_params(trans).rx_page_order, DMA_FROM_DEVICE); __free_pages(rxq->pool[i].page, hw_params(trans).rx_page_order); rxq->pool[i].page = NULL; } list_add_tail(&rxq->pool[i].list, &rxq->rx_used); } } static void iwl_trans_rx_hw_init(struct iwl_trans *trans, struct iwl_rx_queue *rxq) { u32 rb_size; const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ u32 rb_timeout = RX_RB_TIMEOUT; /* FIXME: RX_RB_TIMEOUT for all devices? */ 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(bus(trans), FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); /* Reset driver's Rx queue write index */ iwl_write_direct32(bus(trans), FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); /* Tell device where to find RBD circular buffer in DRAM */ iwl_write_direct32(bus(trans), FH_RSCSR_CHNL0_RBDCB_BASE_REG, (u32)(rxq->bd_dma >> 8)); /* Tell device where in DRAM to update its Rx status */ iwl_write_direct32(bus(trans), 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(bus(trans), 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(bus(trans), CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); } static int iwl_rx_init(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_queue *rxq = &trans_pcie->rxq; int i, err; unsigned long flags; if (!rxq->bd) { err = iwl_trans_rx_alloc(trans); 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(trans); 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(trans); iwl_trans_rx_hw_init(trans, rxq); spin_lock_irqsave(&trans->shrd->lock, flags); rxq->need_update = 1; iwl_rx_queue_update_write_ptr(trans, rxq); spin_unlock_irqrestore(&trans->shrd->lock, flags); return 0; } static void iwl_trans_pcie_rx_free(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_queue *rxq = &trans_pcie->rxq; unsigned long flags; /*if rxq->bd is NULL, it means that nothing has been allocated, * exit now */ if (!rxq->bd) { IWL_DEBUG_INFO(trans, "Free NULL rx context\n"); return; } spin_lock_irqsave(&rxq->lock, flags); iwl_trans_rxq_free_rx_bufs(trans); spin_unlock_irqrestore(&rxq->lock, flags); dma_free_coherent(bus(trans)->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(bus(trans)->dev, sizeof(struct iwl_rb_status), rxq->rb_stts, rxq->rb_stts_dma); else IWL_DEBUG_INFO(trans, "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_trans *trans) { /* stop Rx DMA */ iwl_write_direct32(bus(trans), FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); return iwl_poll_direct_bit(bus(trans), FH_MEM_RSSR_RX_STATUS_REG, FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); } static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr, size_t size) { if (WARN_ON(ptr->addr)) return -EINVAL; ptr->addr = dma_alloc_coherent(bus(trans)->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_trans *trans, struct iwl_dma_ptr *ptr) { if (unlikely(!ptr->addr)) return; dma_free_coherent(bus(trans)->dev, ptr->size, ptr->addr, ptr->dma); memset(ptr, 0, sizeof(*ptr)); } static int iwl_trans_txq_alloc(struct iwl_trans *trans, struct iwl_tx_queue *txq, int slots_num, u32 txq_id) { size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX; int i; if (WARN_ON(txq->meta || txq->cmd || txq->skbs || 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; if (txq_id == trans->shrd->cmd_queue) 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 != trans->shrd->cmd_queue) { txq->skbs = kzalloc(sizeof(txq->skbs[0]) * TFD_QUEUE_SIZE_MAX, GFP_KERNEL); if (!txq->skbs) { IWL_ERR(trans, "kmalloc for auxiliary BD " "structures failed\n"); goto error; } } else { txq->skbs = NULL; } /* Circular buffer of transmit frame descriptors (TFDs), * shared with device */ txq->tfds = dma_alloc_coherent(bus(trans)->dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL); if (!txq->tfds) { IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz); goto error; } txq->q.id = txq_id; return 0; error: kfree(txq->skbs); txq->skbs = NULL; /* since txq->cmd has been zeroed, * all non allocated cmd[i] will be NULL */ if (txq->cmd && txq_id == trans->shrd->cmd_queue) 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_trans *trans, 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(&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(bus(trans), 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_trans *trans, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; struct iwl_queue *q = &txq->q; enum dma_data_direction dma_dir; if (!q->n_bd) return; /* In the command queue, all the TBs are mapped as BIDI * so unmap them as such. */ if (txq_id == trans->shrd->cmd_queue) dma_dir = DMA_BIDIRECTIONAL; else dma_dir = DMA_TO_DEVICE; while (q->write_ptr != q->read_ptr) { /* The read_ptr needs to bound by q->n_window */ iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr), dma_dir); 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_trans *trans, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; struct device *dev = bus(trans)->dev; int i; if (WARN_ON(!txq)) return; iwl_tx_queue_unmap(trans, txq_id); /* De-alloc array of command/tx buffers */ if (txq_id == trans->shrd->cmd_queue) 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, sizeof(struct iwl_tfd) * 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->skbs); txq->skbs = 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_pcie_tx_free(struct iwl_trans *trans) { int txq_id; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); /* Tx queues */ if (trans_pcie->txq) { for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) iwl_tx_queue_free(trans, txq_id); } kfree(trans_pcie->txq); trans_pcie->txq = NULL; iwlagn_free_dma_ptr(trans, &trans_pcie->kw); iwlagn_free_dma_ptr(trans, &trans_pcie->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_trans *trans) { int ret; int txq_id, slots_num; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); u16 scd_bc_tbls_size = hw_params(trans).max_txq_num * sizeof(struct iwlagn_scd_bc_tbl); /*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(trans_pcie->txq)) { ret = -EINVAL; goto error; } ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls, scd_bc_tbls_size); if (ret) { IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); goto error; } /* Alloc keep-warm buffer */ ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE); if (ret) { IWL_ERR(trans, "Keep Warm allocation failed\n"); goto error; } trans_pcie->txq = kzalloc(sizeof(struct iwl_tx_queue) * hw_params(trans).max_txq_num, GFP_KERNEL); if (!trans_pcie->txq) { IWL_ERR(trans, "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 < hw_params(trans).max_txq_num; txq_id++) { slots_num = (txq_id == trans->shrd->cmd_queue) ? TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; ret = iwl_trans_txq_alloc(trans, &trans_pcie->txq[txq_id], slots_num, txq_id); if (ret) { IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); goto error; } } return 0; error: iwl_trans_pcie_tx_free(trans); return ret; } static int iwl_tx_init(struct iwl_trans *trans) { int ret; int txq_id, slots_num; unsigned long flags; bool alloc = false; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); if (!trans_pcie->txq) { ret = iwl_trans_tx_alloc(trans); if (ret) goto error; alloc = true; } spin_lock_irqsave(&trans->shrd->lock, flags); /* Turn off all Tx DMA fifos */ iwl_write_prph(bus(trans), SCD_TXFACT, 0); /* Tell NIC where to find the "keep warm" buffer */ iwl_write_direct32(bus(trans), FH_KW_MEM_ADDR_REG, trans_pcie->kw.dma >> 4); spin_unlock_irqrestore(&trans->shrd->lock, flags); /* Alloc and init all Tx queues, including the command queue (#4/#9) */ for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) { slots_num = (txq_id == trans->shrd->cmd_queue) ? TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; ret = iwl_trans_txq_init(trans, &trans_pcie->txq[txq_id], slots_num, txq_id); if (ret) { IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); goto error; } } return 0; error: /*Upon error, free only if we allocated something */ if (alloc) iwl_trans_pcie_tx_free(trans); return ret; } static void iwl_set_pwr_vmain(struct iwl_trans *trans) { /* * (for documentation purposes) * to set power to V_AUX, do: if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) iwl_set_bits_mask_prph(bus(trans), APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VAUX, ~APMG_PS_CTRL_MSK_PWR_SRC); */ iwl_set_bits_mask_prph(bus(trans), APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, ~APMG_PS_CTRL_MSK_PWR_SRC); } static int iwl_nic_init(struct iwl_trans *trans) { unsigned long flags; /* nic_init */ spin_lock_irqsave(&trans->shrd->lock, flags); iwl_apm_init(priv(trans)); /* Set interrupt coalescing calibration timer to default (512 usecs) */ iwl_write8(bus(trans), CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); spin_unlock_irqrestore(&trans->shrd->lock, flags); iwl_set_pwr_vmain(trans); iwl_nic_config(priv(trans)); /* Allocate the RX queue, or reset if it is already allocated */ iwl_rx_init(trans); /* Allocate or reset and init all Tx and Command queues */ if (iwl_tx_init(trans)) return -ENOMEM; if (hw_params(trans).shadow_reg_enable) { /* enable shadow regs in HW */ iwl_set_bit(bus(trans), CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF); } set_bit(STATUS_INIT, &trans->shrd->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_trans *trans) { int ret; iwl_set_bit(bus(trans), CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); /* See if we got it */ ret = iwl_poll_bit(bus(trans), 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(trans, "hardware%s ready\n", ret < 0 ? " not" : ""); return ret; } /* Note: returns standard 0/-ERROR code */ static int iwl_trans_pcie_prepare_card_hw(struct iwl_trans *trans) { int ret; IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n"); ret = iwl_set_hw_ready(trans); if (ret >= 0) return 0; /* If HW is not ready, prepare the conditions to check again */ iwl_set_bit(bus(trans), CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE); ret = iwl_poll_bit(bus(trans), 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(trans); if (ret >= 0) return 0; return ret; } #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, }, { 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, }, { IWL_TX_FIFO_AUX, IWL_AC_UNSET, }, }; static const u8 iwlagn_bss_ac_to_fifo[] = { IWL_TX_FIFO_VO, IWL_TX_FIFO_VI, IWL_TX_FIFO_BE, IWL_TX_FIFO_BK, }; static const u8 iwlagn_bss_ac_to_queue[] = { 0, 1, 2, 3, }; static const u8 iwlagn_pan_ac_to_fifo[] = { IWL_TX_FIFO_VO_IPAN, IWL_TX_FIFO_VI_IPAN, IWL_TX_FIFO_BE_IPAN, IWL_TX_FIFO_BK_IPAN, }; static const u8 iwlagn_pan_ac_to_queue[] = { 7, 6, 5, 4, }; static int iwl_trans_pcie_start_device(struct iwl_trans *trans) { int ret; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); trans->shrd->ucode_owner = IWL_OWNERSHIP_DRIVER; trans_pcie->ac_to_queue[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_queue; trans_pcie->ac_to_queue[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_queue; trans_pcie->ac_to_fifo[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_fifo; trans_pcie->ac_to_fifo[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_fifo; trans_pcie->mcast_queue[IWL_RXON_CTX_BSS] = 0; trans_pcie->mcast_queue[IWL_RXON_CTX_PAN] = IWL_IPAN_MCAST_QUEUE; if ((hw_params(trans).sku & EEPROM_SKU_CAP_AMT_ENABLE) && iwl_trans_pcie_prepare_card_hw(trans)) { IWL_WARN(trans, "Exit HW not ready\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(bus(trans), CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); else set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); if (iwl_is_rfkill(trans->shrd)) { iwl_set_hw_rfkill_state(priv(trans), true); iwl_enable_interrupts(trans); return -ERFKILL; } iwl_write32(bus(trans), CSR_INT, 0xFFFFFFFF); ret = iwl_nic_init(trans); if (ret) { IWL_ERR(trans, "Unable to init nic\n"); return ret; } /* make sure rfkill handshake bits are cleared */ iwl_write32(bus(trans), CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(bus(trans), CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ iwl_write32(bus(trans), CSR_INT, 0xFFFFFFFF); iwl_enable_interrupts(trans); /* really make sure rfkill handshake bits are cleared */ iwl_write32(bus(trans), CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(bus(trans), 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->shrd->lock and mac access */ static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask) { iwl_write_prph(bus(trans), SCD_TXFACT, mask); } static void iwl_trans_pcie_tx_start(struct iwl_trans *trans) { const struct queue_to_fifo_ac *queue_to_fifo; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); u32 a; unsigned long flags; int i, chan; u32 reg_val; spin_lock_irqsave(&trans->shrd->lock, flags); trans_pcie->scd_base_addr = iwl_read_prph(bus(trans), SCD_SRAM_BASE_ADDR); a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND; /* reset conext data memory */ for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND; a += 4) iwl_write_targ_mem(bus(trans), a, 0); /* reset tx status memory */ for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND; a += 4) iwl_write_targ_mem(bus(trans), a, 0); for (; a < trans_pcie->scd_base_addr + SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(trans).max_txq_num); a += 4) iwl_write_targ_mem(bus(trans), a, 0); iwl_write_prph(bus(trans), SCD_DRAM_BASE_ADDR, trans_pcie->scd_bc_tbls.dma >> 10); /* Enable DMA channel */ for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++) iwl_write_direct32(bus(trans), 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(bus(trans), FH_TX_CHICKEN_BITS_REG); iwl_write_direct32(bus(trans), FH_TX_CHICKEN_BITS_REG, reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); iwl_write_prph(bus(trans), SCD_QUEUECHAIN_SEL, SCD_QUEUECHAIN_SEL_ALL(trans)); iwl_write_prph(bus(trans), SCD_AGGR_SEL, 0); /* initiate the queues */ for (i = 0; i < hw_params(trans).max_txq_num; i++) { iwl_write_prph(bus(trans), SCD_QUEUE_RDPTR(i), 0); iwl_write_direct32(bus(trans), HBUS_TARG_WRPTR, 0 | (i << 8)); iwl_write_targ_mem(bus(trans), trans_pcie->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(i), 0); iwl_write_targ_mem(bus(trans), trans_pcie->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(bus(trans), SCD_INTERRUPT_MASK, IWL_MASK(0, hw_params(trans).max_txq_num)); /* Activate all Tx DMA/FIFO channels */ iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7)); /* map queues to FIFOs */ if (trans->shrd->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(trans, trans->shrd->cmd_queue, 0); /* make sure all queue are not stopped */ memset(&trans_pcie->queue_stopped[0], 0, sizeof(trans_pcie->queue_stopped)); for (i = 0; i < 4; i++) atomic_set(&trans_pcie->queue_stop_count[i], 0); /* reset to 0 to enable all the queue first */ trans_pcie->txq_ctx_active_msk = 0; BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) < IWLAGN_FIRST_AMPDU_QUEUE); BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) < IWLAGN_FIRST_AMPDU_QUEUE); for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) { int fifo = queue_to_fifo[i].fifo; int ac = queue_to_fifo[i].ac; iwl_txq_ctx_activate(trans_pcie, i); if (fifo == IWL_TX_FIFO_UNUSED) continue; if (ac != IWL_AC_UNSET) iwl_set_swq_id(&trans_pcie->txq[i], ac, i); iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i], fifo, 0); } spin_unlock_irqrestore(&trans->shrd->lock, flags); /* Enable L1-Active */ iwl_clear_bits_prph(bus(trans), 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_trans *trans) { int ch, txq_id; unsigned long flags; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); /* Turn off all Tx DMA fifos */ spin_lock_irqsave(&trans->shrd->lock, flags); iwl_trans_txq_set_sched(trans, 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(bus(trans), FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); if (iwl_poll_direct_bit(bus(trans), FH_TSSR_TX_STATUS_REG, FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 1000)) IWL_ERR(trans, "Failing on timeout while stopping" " DMA channel %d [0x%08x]", ch, iwl_read_direct32(bus(trans), FH_TSSR_TX_STATUS_REG)); } spin_unlock_irqrestore(&trans->shrd->lock, flags); if (!trans_pcie->txq) { IWL_WARN(trans, "Stopping tx queues that aren't allocated..."); return 0; } /* Unmap DMA from host system and free skb's */ for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) iwl_tx_queue_unmap(trans, txq_id); return 0; } static void iwl_trans_pcie_disable_sync_irq(struct iwl_trans *trans) { unsigned long flags; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); spin_lock_irqsave(&trans->shrd->lock, flags); iwl_disable_interrupts(trans); spin_unlock_irqrestore(&trans->shrd->lock, flags); /* wait to make sure we flush pending tasklet*/ synchronize_irq(bus(trans)->irq); tasklet_kill(&trans_pcie->irq_tasklet); } static void iwl_trans_pcie_stop_device(struct iwl_trans *trans) { /* stop and reset the on-board processor */ iwl_write32(bus(trans), CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ iwl_trans_pcie_disable_sync_irq(trans); /* device going down, Stop using ICT table */ iwl_disable_ict(trans); /* * 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, &trans->shrd->status)) { iwl_trans_tx_stop(trans); iwl_trans_rx_stop(trans); /* Power-down device's busmaster DMA clocks */ iwl_write_prph(bus(trans), 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(bus(trans), 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(trans)); } static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, u8 sta_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl_tx_cmd *tx_cmd = &dev_cmd->cmd.tx; struct iwl_cmd_meta *out_meta; struct iwl_tx_queue *txq; struct iwl_queue *q; dma_addr_t phys_addr = 0; dma_addr_t txcmd_phys; dma_addr_t scratch_phys; u16 len, firstlen, secondlen; u16 seq_number = 0; u8 wait_write_ptr = 0; u8 txq_id; u8 tid = 0; bool is_agg = false; __le16 fc = hdr->frame_control; u8 hdr_len = ieee80211_hdrlen(fc); /* * Send this frame after DTIM -- there's a special queue * reserved for this for contexts that support AP mode. */ if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { txq_id = trans_pcie->mcast_queue[ctx]; /* * The microcode will clear the more data * bit in the last frame it transmits. */ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) txq_id = IWL_AUX_QUEUE; else txq_id = trans_pcie->ac_to_queue[ctx][skb_get_queue_mapping(skb)]; if (ieee80211_is_data_qos(fc)) { u8 *qc = NULL; struct iwl_tid_data *tid_data; qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; tid_data = &trans->shrd->tid_data[sta_id][tid]; if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) return -1; seq_number = tid_data->seq_number; seq_number &= IEEE80211_SCTL_SEQ; hdr->seq_ctrl = hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG); hdr->seq_ctrl |= cpu_to_le16(seq_number); seq_number += 0x10; /* aggregation is on for this */ if (info->flags & IEEE80211_TX_CTL_AMPDU && tid_data->agg.state == IWL_AGG_ON) { txq_id = tid_data->agg.txq_id; is_agg = true; } } txq = &trans_pcie->txq[txq_id]; q = &txq->q; /* Set up driver data for this TFD */ txq->skbs[q->write_ptr] = skb; txq->cmd[q->write_ptr] = 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))); /* 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(bus(trans)->dev, &dev_cmd->hdr, firstlen, DMA_BIDIRECTIONAL); if (unlikely(dma_mapping_error(bus(trans)->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(bus(trans)->dev, skb->data + hdr_len, secondlen, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(bus(trans)->dev, phys_addr))) { dma_unmap_single(bus(trans)->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(trans, txq, txcmd_phys, firstlen, 1); if (secondlen > 0) iwlagn_txq_attach_buf_to_tfd(trans, 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(bus(trans)->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(trans, "sequence nr = 0X%x\n", le16_to_cpu(dev_cmd->hdr.sequence)); IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); /* Set up entry for this TFD in Tx byte-count array */ if (is_agg) iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len)); dma_sync_single_for_device(bus(trans)->dev, txcmd_phys, firstlen, DMA_BIDIRECTIONAL); trace_iwlwifi_dev_tx(priv(trans), &((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(trans, txq); if (ieee80211_is_data_qos(fc)) { trans->shrd->tid_data[sta_id][tid].tfds_in_queue++; if (!ieee80211_has_morefrags(fc)) trans->shrd->tid_data[sta_id][tid].seq_number = seq_number; } /* * 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) { if (wait_write_ptr) { txq->need_update = 1; iwl_txq_update_write_ptr(trans, txq); } else { iwl_stop_queue(trans, txq); } } return 0; } static void iwl_trans_pcie_kick_nic(struct iwl_trans *trans) { /* Remove all resets to allow NIC to operate */ iwl_write32(bus(trans), CSR_RESET, 0); } static int iwl_trans_pcie_request_irq(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); int err; trans_pcie->inta_mask = CSR_INI_SET_MASK; tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long)) iwl_irq_tasklet, (unsigned long)trans); iwl_alloc_isr_ict(trans); err = request_irq(bus(trans)->irq, iwl_isr_ict, IRQF_SHARED, DRV_NAME, trans); if (err) { IWL_ERR(trans, "Error allocating IRQ %d\n", bus(trans)->irq); iwl_free_isr_ict(trans); return err; } INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish); return 0; } static int iwlagn_txq_check_empty(struct iwl_trans *trans, int sta_id, u8 tid, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_queue *q = &trans_pcie->txq[txq_id].q; struct iwl_tid_data *tid_data = &trans->shrd->tid_data[sta_id][tid]; lockdep_assert_held(&trans->shrd->sta_lock); switch (trans->shrd->tid_data[sta_id][tid].agg.state) { case IWL_EMPTYING_HW_QUEUE_DELBA: /* We are reclaiming the last packet of the */ /* aggregated HW queue */ if ((txq_id == tid_data->agg.txq_id) && (q->read_ptr == q->write_ptr)) { IWL_DEBUG_HT(trans, "HW queue empty: continue DELBA flow\n"); iwl_trans_pcie_txq_agg_disable(trans, txq_id); tid_data->agg.state = IWL_AGG_OFF; iwl_stop_tx_ba_trans_ready(priv(trans), NUM_IWL_RXON_CTX, sta_id, tid); iwl_wake_queue(trans, &trans_pcie->txq[txq_id]); } break; case IWL_EMPTYING_HW_QUEUE_ADDBA: /* We are reclaiming the last packet of the queue */ if (tid_data->tfds_in_queue == 0) { IWL_DEBUG_HT(trans, "HW queue empty: continue ADDBA flow\n"); tid_data->agg.state = IWL_AGG_ON; iwl_start_tx_ba_trans_ready(priv(trans), NUM_IWL_RXON_CTX, sta_id, tid); } break; default: break; } return 0; } static void iwl_free_tfds_in_queue(struct iwl_trans *trans, int sta_id, int tid, int freed) { lockdep_assert_held(&trans->shrd->sta_lock); if (trans->shrd->tid_data[sta_id][tid].tfds_in_queue >= freed) trans->shrd->tid_data[sta_id][tid].tfds_in_queue -= freed; else { IWL_DEBUG_TX(trans, "free more than tfds_in_queue (%u:%d)\n", trans->shrd->tid_data[sta_id][tid].tfds_in_queue, freed); trans->shrd->tid_data[sta_id][tid].tfds_in_queue = 0; } } static void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid, int txq_id, int ssn, u32 status, struct sk_buff_head *skbs) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; enum iwl_agg_state agg_state; /* n_bd is usually 256 => n_bd - 1 = 0xff */ int tfd_num = ssn & (txq->q.n_bd - 1); int freed = 0; bool cond; txq->time_stamp = jiffies; if (txq->sched_retry) { agg_state = trans->shrd->tid_data[txq->sta_id][txq->tid].agg.state; cond = (agg_state != IWL_EMPTYING_HW_QUEUE_DELBA); } else { cond = (status != TX_STATUS_FAIL_PASSIVE_NO_RX); } if (txq->q.read_ptr != tfd_num) { IWL_DEBUG_TX_REPLY(trans, "Retry scheduler reclaim " "scd_ssn=%d idx=%d txq=%d swq=%d\n", ssn , tfd_num, txq_id, txq->swq_id); freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs); if (iwl_queue_space(&txq->q) > txq->q.low_mark && cond) iwl_wake_queue(trans, txq); } iwl_free_tfds_in_queue(trans, sta_id, tid, freed); iwlagn_txq_check_empty(trans, sta_id, tid, txq_id); } static void iwl_trans_pcie_free(struct iwl_trans *trans) { iwl_trans_pcie_tx_free(trans); iwl_trans_pcie_rx_free(trans); free_irq(bus(trans)->irq, trans); iwl_free_isr_ict(trans); trans->shrd->trans = NULL; kfree(trans); } #ifdef CONFIG_PM_SLEEP static int iwl_trans_pcie_suspend(struct iwl_trans *trans) { /* * This function is called when system goes into suspend state * mac80211 will call iwl_mac_stop() from the mac80211 suspend function * first but since iwl_mac_stop() has no knowledge of who the caller is, * it will not call apm_ops.stop() to stop the DMA operation. * Calling apm_ops.stop here to make sure we stop the DMA. * * But of course ... if we have configured WoWLAN then we did other * things already :-) */ if (!trans->shrd->wowlan) iwl_apm_stop(priv(trans)); return 0; } static int iwl_trans_pcie_resume(struct iwl_trans *trans) { bool hw_rfkill = false; iwl_enable_interrupts(trans); if (!(iwl_read32(bus(trans), CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) hw_rfkill = true; if (hw_rfkill) set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); else clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); iwl_set_hw_rfkill_state(priv(trans), hw_rfkill); return 0; } #endif /* CONFIG_PM_SLEEP */ static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans, enum iwl_rxon_context_id ctx) { u8 ac, txq_id; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); for (ac = 0; ac < AC_NUM; ac++) { txq_id = trans_pcie->ac_to_queue[ctx][ac]; IWL_DEBUG_INFO(trans, "Queue Status: Q[%d] %s\n", ac, (atomic_read(&trans_pcie->queue_stop_count[ac]) > 0) ? "stopped" : "awake"); iwl_wake_queue(trans, &trans_pcie->txq[txq_id]); } } const struct iwl_trans_ops trans_ops_pcie; static struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd) { struct iwl_trans *iwl_trans = kzalloc(sizeof(struct iwl_trans) + sizeof(struct iwl_trans_pcie), GFP_KERNEL); if (iwl_trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(iwl_trans); iwl_trans->ops = &trans_ops_pcie; iwl_trans->shrd = shrd; trans_pcie->trans = iwl_trans; spin_lock_init(&iwl_trans->hcmd_lock); } return iwl_trans; } static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); iwl_stop_queue(trans, &trans_pcie->txq[txq_id]); } #define IWL_FLUSH_WAIT_MS 2000 static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq; struct iwl_queue *q; int cnt; unsigned long now = jiffies; int ret = 0; /* waiting for all the tx frames complete might take a while */ for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { if (cnt == trans->shrd->cmd_queue) continue; txq = &trans_pcie->txq[cnt]; q = &txq->q; while (q->read_ptr != q->write_ptr && !time_after(jiffies, now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) msleep(1); if (q->read_ptr != q->write_ptr) { IWL_ERR(trans, "fail to flush all tx fifo queues\n"); ret = -ETIMEDOUT; break; } } return ret; } /* * On every watchdog tick we check (latest) time stamp. If it does not * change during timeout period and queue is not empty we reset firmware. */ static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq = &trans_pcie->txq[cnt]; struct iwl_queue *q = &txq->q; unsigned long timeout; if (q->read_ptr == q->write_ptr) { txq->time_stamp = jiffies; return 0; } timeout = txq->time_stamp + msecs_to_jiffies(hw_params(trans).wd_timeout); if (time_after(jiffies, timeout)) { IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id, hw_params(trans).wd_timeout); IWL_ERR(trans, "Current read_ptr %d write_ptr %d\n", q->read_ptr, q->write_ptr); return 1; } return 0; } static const char *get_fh_string(int cmd) { switch (cmd) { IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); IWL_CMD(FH_RSCSR_CHNL0_WPTR); IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); IWL_CMD(FH_TSSR_TX_STATUS_REG); IWL_CMD(FH_TSSR_TX_ERROR_REG); default: return "UNKNOWN"; } } int iwl_dump_fh(struct iwl_trans *trans, char **buf, bool display) { int i; #ifdef CONFIG_IWLWIFI_DEBUG int pos = 0; size_t bufsz = 0; #endif static const u32 fh_tbl[] = { FH_RSCSR_CHNL0_STTS_WPTR_REG, FH_RSCSR_CHNL0_RBDCB_BASE_REG, FH_RSCSR_CHNL0_WPTR, FH_MEM_RCSR_CHNL0_CONFIG_REG, FH_MEM_RSSR_SHARED_CTRL_REG, FH_MEM_RSSR_RX_STATUS_REG, FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, FH_TSSR_TX_STATUS_REG, FH_TSSR_TX_ERROR_REG }; #ifdef CONFIG_IWLWIFI_DEBUG if (display) { bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; *buf = kmalloc(bufsz, GFP_KERNEL); if (!*buf) return -ENOMEM; pos += scnprintf(*buf + pos, bufsz - pos, "FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { pos += scnprintf(*buf + pos, bufsz - pos, " %34s: 0X%08x\n", get_fh_string(fh_tbl[i]), iwl_read_direct32(bus(trans), fh_tbl[i])); } return pos; } #endif IWL_ERR(trans, "FH register values:\n"); for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { IWL_ERR(trans, " %34s: 0X%08x\n", get_fh_string(fh_tbl[i]), iwl_read_direct32(bus(trans), fh_tbl[i])); } return 0; } static const char *get_csr_string(int cmd) { switch (cmd) { IWL_CMD(CSR_HW_IF_CONFIG_REG); IWL_CMD(CSR_INT_COALESCING); IWL_CMD(CSR_INT); IWL_CMD(CSR_INT_MASK); IWL_CMD(CSR_FH_INT_STATUS); IWL_CMD(CSR_GPIO_IN); IWL_CMD(CSR_RESET); IWL_CMD(CSR_GP_CNTRL); IWL_CMD(CSR_HW_REV); IWL_CMD(CSR_EEPROM_REG); IWL_CMD(CSR_EEPROM_GP); IWL_CMD(CSR_OTP_GP_REG); IWL_CMD(CSR_GIO_REG); IWL_CMD(CSR_GP_UCODE_REG); IWL_CMD(CSR_GP_DRIVER_REG); IWL_CMD(CSR_UCODE_DRV_GP1); IWL_CMD(CSR_UCODE_DRV_GP2); IWL_CMD(CSR_LED_REG); IWL_CMD(CSR_DRAM_INT_TBL_REG); IWL_CMD(CSR_GIO_CHICKEN_BITS); IWL_CMD(CSR_ANA_PLL_CFG); IWL_CMD(CSR_HW_REV_WA_REG); IWL_CMD(CSR_DBG_HPET_MEM_REG); default: return "UNKNOWN"; } } void iwl_dump_csr(struct iwl_trans *trans) { int i; static const u32 csr_tbl[] = { CSR_HW_IF_CONFIG_REG, CSR_INT_COALESCING, CSR_INT, CSR_INT_MASK, CSR_FH_INT_STATUS, CSR_GPIO_IN, CSR_RESET, CSR_GP_CNTRL, CSR_HW_REV, CSR_EEPROM_REG, CSR_EEPROM_GP, CSR_OTP_GP_REG, CSR_GIO_REG, CSR_GP_UCODE_REG, CSR_GP_DRIVER_REG, CSR_UCODE_DRV_GP1, CSR_UCODE_DRV_GP2, CSR_LED_REG, CSR_DRAM_INT_TBL_REG, CSR_GIO_CHICKEN_BITS, CSR_ANA_PLL_CFG, CSR_HW_REV_WA_REG, CSR_DBG_HPET_MEM_REG }; IWL_ERR(trans, "CSR values:\n"); IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is " "CSR_INT_PERIODIC_REG)\n"); for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { IWL_ERR(trans, " %25s: 0X%08x\n", get_csr_string(csr_tbl[i]), iwl_read32(bus(trans), csr_tbl[i])); } } #ifdef CONFIG_IWLWIFI_DEBUGFS /* create and remove of files */ #define DEBUGFS_ADD_FILE(name, parent, mode) do { \ if (!debugfs_create_file(#name, mode, parent, trans, \ &iwl_dbgfs_##name##_ops)) \ return -ENOMEM; \ } while (0) /* file operation */ #define DEBUGFS_READ_FUNC(name) \ static ssize_t iwl_dbgfs_##name##_read(struct file *file, \ char __user *user_buf, \ size_t count, loff_t *ppos); #define DEBUGFS_WRITE_FUNC(name) \ static ssize_t iwl_dbgfs_##name##_write(struct file *file, \ const char __user *user_buf, \ size_t count, loff_t *ppos); static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } #define DEBUGFS_READ_FILE_OPS(name) \ DEBUGFS_READ_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .read = iwl_dbgfs_##name##_read, \ .open = iwl_dbgfs_open_file_generic, \ .llseek = generic_file_llseek, \ }; #define DEBUGFS_WRITE_FILE_OPS(name) \ DEBUGFS_WRITE_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .write = iwl_dbgfs_##name##_write, \ .open = iwl_dbgfs_open_file_generic, \ .llseek = generic_file_llseek, \ }; #define DEBUGFS_READ_WRITE_FILE_OPS(name) \ DEBUGFS_READ_FUNC(name); \ DEBUGFS_WRITE_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .write = iwl_dbgfs_##name##_write, \ .read = iwl_dbgfs_##name##_read, \ .open = iwl_dbgfs_open_file_generic, \ .llseek = generic_file_llseek, \ }; static ssize_t iwl_dbgfs_tx_queue_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_tx_queue *txq; struct iwl_queue *q; char *buf; int pos = 0; int cnt; int ret; const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num; if (!trans_pcie->txq) { IWL_ERR(trans, "txq not ready\n"); return -EAGAIN; } buf = kzalloc(bufsz, GFP_KERNEL); if (!buf) return -ENOMEM; for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { txq = &trans_pcie->txq[cnt]; q = &txq->q; pos += scnprintf(buf + pos, bufsz - pos, "hwq %.2d: read=%u write=%u stop=%d" " swq_id=%#.2x (ac %d/hwq %d)\n", cnt, q->read_ptr, q->write_ptr, !!test_bit(cnt, trans_pcie->queue_stopped), txq->swq_id, txq->swq_id & 3, (txq->swq_id >> 2) & 0x1f); if (cnt >= 4) continue; /* for the ACs, display the stop count too */ pos += scnprintf(buf + pos, bufsz - pos, " stop-count: %d\n", atomic_read(&trans_pcie->queue_stop_count[cnt])); } ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_queue *rxq = &trans_pcie->rxq; char buf[256]; int pos = 0; const size_t bufsz = sizeof(buf); pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n", rxq->read); pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n", rxq->write); pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n", rxq->free_count); if (rxq->rb_stts) { pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF); } else { pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: Not Allocated\n"); } return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } static ssize_t iwl_dbgfs_log_event_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; char *buf; int pos = 0; ssize_t ret = -ENOMEM; ret = pos = iwl_dump_nic_event_log(trans, true, &buf, true); if (buf) { ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); } return ret; } static ssize_t iwl_dbgfs_log_event_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; u32 event_log_flag; char buf[8]; int buf_size; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%d", &event_log_flag) != 1) return -EFAULT; if (event_log_flag == 1) iwl_dump_nic_event_log(trans, true, NULL, false); return count; } static ssize_t iwl_dbgfs_interrupt_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct isr_statistics *isr_stats = &trans_pcie->isr_stats; int pos = 0; char *buf; int bufsz = 24 * 64; /* 24 items * 64 char per item */ ssize_t ret; buf = kzalloc(bufsz, GFP_KERNEL); if (!buf) { IWL_ERR(trans, "Can not allocate Buffer\n"); return -ENOMEM; } pos += scnprintf(buf + pos, bufsz - pos, "Interrupt Statistics Report:\n"); pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", isr_stats->hw); pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", isr_stats->sw); if (isr_stats->sw || isr_stats->hw) { pos += scnprintf(buf + pos, bufsz - pos, "\tLast Restarting Code: 0x%X\n", isr_stats->err_code); } #ifdef CONFIG_IWLWIFI_DEBUG pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", isr_stats->sch); pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", isr_stats->alive); #endif pos += scnprintf(buf + pos, bufsz - pos, "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill); pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", isr_stats->ctkill); pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", isr_stats->wakeup); pos += scnprintf(buf + pos, bufsz - pos, "Rx command responses:\t\t %u\n", isr_stats->rx); pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", isr_stats->tx); pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", isr_stats->unhandled); ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_interrupt_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct isr_statistics *isr_stats = &trans_pcie->isr_stats; char buf[8]; int buf_size; u32 reset_flag; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%x", &reset_flag) != 1) return -EFAULT; if (reset_flag == 0) memset(isr_stats, 0, sizeof(*isr_stats)); return count; } static ssize_t iwl_dbgfs_csr_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; char buf[8]; int buf_size; int csr; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%d", &csr) != 1) return -EFAULT; iwl_dump_csr(trans); return count; } static ssize_t iwl_dbgfs_fh_reg_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_trans *trans = file->private_data; char *buf; int pos = 0; ssize_t ret = -EFAULT; ret = pos = iwl_dump_fh(trans, &buf, true); if (buf) { ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); } return ret; } DEBUGFS_READ_WRITE_FILE_OPS(log_event); DEBUGFS_READ_WRITE_FILE_OPS(interrupt); DEBUGFS_READ_FILE_OPS(fh_reg); DEBUGFS_READ_FILE_OPS(rx_queue); DEBUGFS_READ_FILE_OPS(tx_queue); DEBUGFS_WRITE_FILE_OPS(csr); /* * Create the debugfs files and directories * */ static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, struct dentry *dir) { DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR); DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR); DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR); DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR); DEBUGFS_ADD_FILE(csr, dir, S_IWUSR); DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR); return 0; } #else static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, struct dentry *dir) { return 0; } #endif /*CONFIG_IWLWIFI_DEBUGFS */ const struct iwl_trans_ops trans_ops_pcie = { .alloc = iwl_trans_pcie_alloc, .request_irq = iwl_trans_pcie_request_irq, .start_device = iwl_trans_pcie_start_device, .prepare_card_hw = iwl_trans_pcie_prepare_card_hw, .stop_device = iwl_trans_pcie_stop_device, .tx_start = iwl_trans_pcie_tx_start, .wake_any_queue = iwl_trans_pcie_wake_any_queue, .send_cmd = iwl_trans_pcie_send_cmd, .tx = iwl_trans_pcie_tx, .reclaim = iwl_trans_pcie_reclaim, .tx_agg_disable = iwl_trans_pcie_tx_agg_disable, .tx_agg_alloc = iwl_trans_pcie_tx_agg_alloc, .tx_agg_setup = iwl_trans_pcie_tx_agg_setup, .kick_nic = iwl_trans_pcie_kick_nic, .free = iwl_trans_pcie_free, .stop_queue = iwl_trans_pcie_stop_queue, .dbgfs_register = iwl_trans_pcie_dbgfs_register, .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty, .check_stuck_queue = iwl_trans_pcie_check_stuck_queue, #ifdef CONFIG_PM_SLEEP .suspend = iwl_trans_pcie_suspend, .resume = iwl_trans_pcie_resume, #endif };