| /****************************************************************************** |
| * |
| * 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 <ilw@linux.intel.com> |
| * 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 <linux/interrupt.h> |
| #include <linux/debugfs.h> |
| #include <linux/bitops.h> |
| #include <linux/gfp.h> |
| |
| #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 <sta,tid> */ |
| 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 |
| |
| 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; |
| } |
| #else /* CONFIG_PM */ |
| static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
| { return 0; } |
| |
| static int iwl_trans_pcie_resume(struct iwl_trans *trans) |
| { return 0; } |
| |
| #endif /* CONFIG_PM */ |
| |
| 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, |
| |
| .suspend = iwl_trans_pcie_suspend, |
| .resume = iwl_trans_pcie_resume, |
| }; |