| /****************************************************************************** |
| * |
| * 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 - 2012 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 - 2012 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/pci.h> |
| #include <linux/pci-aspm.h> |
| #include <linux/interrupt.h> |
| #include <linux/debugfs.h> |
| #include <linux/sched.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" |
| |
| #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) |
| |
| #define SCD_QUEUECHAIN_SEL_ALL(trans, trans_pcie) \ |
| (((1<<cfg(trans)->base_params->num_of_queues) - 1) &\ |
| (~(1<<(trans_pcie)->cmd_queue))) |
| |
| 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 = trans->dev; |
| |
| memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq)); |
| |
| spin_lock_init(&rxq->lock); |
| |
| if (WARN_ON(rxq->bd || rxq->rb_stts)) |
| return -EINVAL; |
| |
| /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */ |
| rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, |
| &rxq->bd_dma, GFP_KERNEL); |
| if (!rxq->bd) |
| goto err_bd; |
| |
| /*Allocate the driver's pointer to receive buffer status */ |
| rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts), |
| &rxq->rb_stts_dma, GFP_KERNEL); |
| if (!rxq->rb_stts) |
| goto err_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(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(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| |
| /* Reset driver's Rx queue write index */ |
| iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); |
| |
| /* Tell device where to find RBD circular buffer in DRAM */ |
| iwl_write_direct32(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(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(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 | |
| 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(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_pcie->irq_lock, flags); |
| rxq->need_update = 1; |
| iwl_rx_queue_update_write_ptr(trans, rxq); |
| spin_unlock_irqrestore(&trans_pcie->irq_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(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(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(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| return iwl_poll_direct_bit(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(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(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; |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds)) |
| return -EINVAL; |
| |
| txq->q.n_window = slots_num; |
| |
| txq->meta = kcalloc(slots_num, sizeof(txq->meta[0]), GFP_KERNEL); |
| txq->cmd = kcalloc(slots_num, sizeof(txq->cmd[0]), GFP_KERNEL); |
| |
| if (!txq->meta || !txq->cmd) |
| goto error; |
| |
| if (txq_id == trans_pcie->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_pcie->cmd_queue) { |
| txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(txq->skbs[0]), |
| 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(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_pcie->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); |
| |
| /* 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; |
| |
| spin_lock_init(&txq->lock); |
| |
| /* |
| * 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(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_pcie->cmd_queue) |
| dma_dir = DMA_BIDIRECTIONAL; |
| else |
| dma_dir = DMA_TO_DEVICE; |
| |
| spin_lock_bh(&txq->lock); |
| 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); |
| } |
| spin_unlock_bh(&txq->lock); |
| } |
| |
| /** |
| * 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 = 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_pcie->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 < cfg(trans)->base_params->num_of_queues; 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 = cfg(trans)->base_params->num_of_queues * |
| 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 = kcalloc(cfg(trans)->base_params->num_of_queues, |
| sizeof(struct iwl_tx_queue), 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 < cfg(trans)->base_params->num_of_queues; |
| txq_id++) { |
| slots_num = (txq_id == trans_pcie->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_pcie->irq_lock, flags); |
| |
| /* Turn off all Tx DMA fifos */ |
| iwl_write_prph(trans, SCD_TXFACT, 0); |
| |
| /* Tell NIC where to find the "keep warm" buffer */ |
| iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
| trans_pcie->kw.dma >> 4); |
| |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
| for (txq_id = 0; txq_id < cfg(trans)->base_params->num_of_queues; |
| txq_id++) { |
| slots_num = (txq_id == trans_pcie->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(trans, APMG_PS_CTRL_REG, |
| APMG_PS_CTRL_VAL_PWR_SRC_VAUX, |
| ~APMG_PS_CTRL_MSK_PWR_SRC); |
| */ |
| |
| iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, |
| APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, |
| ~APMG_PS_CTRL_MSK_PWR_SRC); |
| } |
| |
| /* PCI registers */ |
| #define PCI_CFG_RETRY_TIMEOUT 0x041 |
| #define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01 |
| #define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02 |
| |
| static u16 iwl_pciexp_link_ctrl(struct iwl_trans *trans) |
| { |
| int pos; |
| u16 pci_lnk_ctl; |
| struct iwl_trans_pcie *trans_pcie = |
| IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| struct pci_dev *pci_dev = trans_pcie->pci_dev; |
| |
| pos = pci_pcie_cap(pci_dev); |
| pci_read_config_word(pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl); |
| return pci_lnk_ctl; |
| } |
| |
| static void iwl_apm_config(struct iwl_trans *trans) |
| { |
| /* |
| * HW bug W/A for instability in PCIe bus L0S->L1 transition. |
| * Check if BIOS (or OS) enabled L1-ASPM on this device. |
| * If so (likely), disable L0S, so device moves directly L0->L1; |
| * costs negligible amount of power savings. |
| * If not (unlikely), enable L0S, so there is at least some |
| * power savings, even without L1. |
| */ |
| u16 lctl = iwl_pciexp_link_ctrl(trans); |
| |
| if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == |
| PCI_CFG_LINK_CTRL_VAL_L1_EN) { |
| /* L1-ASPM enabled; disable(!) L0S */ |
| iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); |
| dev_printk(KERN_INFO, trans->dev, |
| "L1 Enabled; Disabling L0S\n"); |
| } else { |
| /* L1-ASPM disabled; enable(!) L0S */ |
| iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); |
| dev_printk(KERN_INFO, trans->dev, |
| "L1 Disabled; Enabling L0S\n"); |
| } |
| trans->pm_support = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); |
| } |
| |
| /* |
| * Start up NIC's basic functionality after it has been reset |
| * (e.g. after platform boot, or shutdown via iwl_apm_stop()) |
| * NOTE: This does not load uCode nor start the embedded processor |
| */ |
| static int iwl_apm_init(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| int ret = 0; |
| IWL_DEBUG_INFO(trans, "Init card's basic functions\n"); |
| |
| /* |
| * Use "set_bit" below rather than "write", to preserve any hardware |
| * bits already set by default after reset. |
| */ |
| |
| /* Disable L0S exit timer (platform NMI Work/Around) */ |
| iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, |
| CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); |
| |
| /* |
| * Disable L0s without affecting L1; |
| * don't wait for ICH L0s (ICH bug W/A) |
| */ |
| iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, |
| CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); |
| |
| /* Set FH wait threshold to maximum (HW error during stress W/A) */ |
| iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); |
| |
| /* |
| * Enable HAP INTA (interrupt from management bus) to |
| * wake device's PCI Express link L1a -> L0s |
| */ |
| iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, |
| CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); |
| |
| iwl_apm_config(trans); |
| |
| /* Configure analog phase-lock-loop before activating to D0A */ |
| if (cfg(trans)->base_params->pll_cfg_val) |
| iwl_set_bit(trans, CSR_ANA_PLL_CFG, |
| cfg(trans)->base_params->pll_cfg_val); |
| |
| /* |
| * Set "initialization complete" bit to move adapter from |
| * D0U* --> D0A* (powered-up active) state. |
| */ |
| iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); |
| |
| /* |
| * Wait for clock stabilization; once stabilized, access to |
| * device-internal resources is supported, e.g. iwl_write_prph() |
| * and accesses to uCode SRAM. |
| */ |
| ret = iwl_poll_bit(trans, CSR_GP_CNTRL, |
| CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, |
| CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); |
| if (ret < 0) { |
| IWL_DEBUG_INFO(trans, "Failed to init the card\n"); |
| goto out; |
| } |
| |
| /* |
| * Enable DMA clock and wait for it to stabilize. |
| * |
| * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits |
| * do not disable clocks. This preserves any hardware bits already |
| * set by default in "CLK_CTRL_REG" after reset. |
| */ |
| iwl_write_prph(trans, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT); |
| udelay(20); |
| |
| /* Disable L1-Active */ |
| iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, |
| APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
| |
| set_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status); |
| |
| out: |
| return ret; |
| } |
| |
| static int iwl_apm_stop_master(struct iwl_trans *trans) |
| { |
| int ret = 0; |
| |
| /* stop device's busmaster DMA activity */ |
| iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); |
| |
| ret = iwl_poll_bit(trans, CSR_RESET, |
| CSR_RESET_REG_FLAG_MASTER_DISABLED, |
| CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); |
| if (ret) |
| IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n"); |
| |
| IWL_DEBUG_INFO(trans, "stop master\n"); |
| |
| return ret; |
| } |
| |
| static void iwl_apm_stop(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n"); |
| |
| clear_bit(STATUS_DEVICE_ENABLED, &trans_pcie->status); |
| |
| /* Stop device's DMA activity */ |
| iwl_apm_stop_master(trans); |
| |
| /* Reset the entire device */ |
| iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); |
| |
| udelay(10); |
| |
| /* |
| * Clear "initialization complete" bit to move adapter from |
| * D0A* (powered-up Active) --> D0U* (Uninitialized) state. |
| */ |
| iwl_clear_bit(trans, CSR_GP_CNTRL, |
| CSR_GP_CNTRL_REG_FLAG_INIT_DONE); |
| } |
| |
| static int iwl_nic_init(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| unsigned long flags; |
| |
| /* nic_init */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_apm_init(trans); |
| |
| /* Set interrupt coalescing calibration timer to default (512 usecs) */ |
| iwl_write8(trans, CSR_INT_COALESCING, |
| IWL_HOST_INT_CALIB_TIMEOUT_DEF); |
| |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| iwl_set_pwr_vmain(trans); |
| |
| iwl_op_mode_nic_config(trans->op_mode); |
| |
| #ifndef CONFIG_IWLWIFI_IDI |
| /* Allocate the RX queue, or reset if it is already allocated */ |
| iwl_rx_init(trans); |
| #endif |
| |
| /* Allocate or reset and init all Tx and Command queues */ |
| if (iwl_tx_init(trans)) |
| return -ENOMEM; |
| |
| if (cfg(trans)->base_params->shadow_reg_enable) { |
| /* enable shadow regs in HW */ |
| iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, |
| 0x800FFFFF); |
| } |
| |
| 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(trans, CSR_HW_IF_CONFIG_REG, |
| CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); |
| |
| /* See if we got it */ |
| ret = iwl_poll_bit(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_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 the card is ready, exit 0 */ |
| if (ret >= 0) |
| return 0; |
| |
| /* If HW is not ready, prepare the conditions to check again */ |
| iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, |
| CSR_HW_IF_CONFIG_REG_PREPARE); |
| |
| ret = iwl_poll_bit(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; |
| } |
| |
| /* |
| * ucode |
| */ |
| static int iwl_load_section(struct iwl_trans *trans, u8 section_num, |
| const struct fw_desc *section) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| dma_addr_t phy_addr = section->p_addr; |
| u32 byte_cnt = section->len; |
| u32 dst_addr = section->offset; |
| int ret; |
| |
| trans_pcie->ucode_write_complete = false; |
| |
| iwl_write_direct32(trans, |
| FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), |
| FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE); |
| |
| iwl_write_direct32(trans, |
| FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL), dst_addr); |
| |
| iwl_write_direct32(trans, |
| FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL), |
| phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK); |
| |
| iwl_write_direct32(trans, |
| FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL), |
| (iwl_get_dma_hi_addr(phy_addr) |
| << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt); |
| |
| iwl_write_direct32(trans, |
| FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL), |
| 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM | |
| 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX | |
| FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID); |
| |
| iwl_write_direct32(trans, |
| FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), |
| FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | |
| FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE | |
| FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD); |
| |
| IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n", |
| section_num); |
| ret = wait_event_timeout(trans_pcie->ucode_write_waitq, |
| trans_pcie->ucode_write_complete, 5 * HZ); |
| if (!ret) { |
| IWL_ERR(trans, "Could not load the [%d] uCode section\n", |
| section_num); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static int iwl_load_given_ucode(struct iwl_trans *trans, |
| const struct fw_img *image) |
| { |
| int ret = 0; |
| int i; |
| |
| for (i = 0; i < IWL_UCODE_SECTION_MAX; i++) { |
| if (!image->sec[i].p_addr) |
| break; |
| |
| ret = iwl_load_section(trans, i, &image->sec[i]); |
| if (ret) |
| return ret; |
| } |
| |
| /* Remove all resets to allow NIC to operate */ |
| iwl_write32(trans, CSR_RESET, 0); |
| |
| return 0; |
| } |
| |
| static int iwl_trans_pcie_start_fw(struct iwl_trans *trans, |
| const struct fw_img *fw) |
| { |
| int ret; |
| bool hw_rfkill; |
| |
| /* This may fail if AMT took ownership of the device */ |
| if (iwl_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 */ |
| hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) & |
| CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| |
| if (hw_rfkill) { |
| iwl_enable_rfkill_int(trans); |
| return -ERFKILL; |
| } |
| |
| iwl_write32(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(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, |
| CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
| |
| /* clear (again), then enable host interrupts */ |
| iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
| iwl_enable_interrupts(trans); |
| |
| /* really make sure rfkill handshake bits are cleared */ |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| |
| /* Load the given image to the HW */ |
| return iwl_load_given_ucode(trans, fw); |
| } |
| |
| /* |
| * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask |
| * must be called under the irq lock and with MAC access |
| */ |
| static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask) |
| { |
| struct iwl_trans_pcie __maybe_unused *trans_pcie = |
| IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| lockdep_assert_held(&trans_pcie->irq_lock); |
| |
| iwl_write_prph(trans, SCD_TXFACT, mask); |
| } |
| |
| static void iwl_tx_start(struct iwl_trans *trans) |
| { |
| 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_pcie->irq_lock, flags); |
| |
| trans_pcie->scd_base_addr = |
| iwl_read_prph(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(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(trans, a, 0); |
| for (; a < trans_pcie->scd_base_addr + |
| SCD_TRANS_TBL_OFFSET_QUEUE( |
| cfg(trans)->base_params->num_of_queues); |
| a += 4) |
| iwl_write_targ_mem(trans, a, 0); |
| |
| iwl_write_prph(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(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(trans, FH_TX_CHICKEN_BITS_REG); |
| iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG, |
| reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); |
| |
| iwl_write_prph(trans, SCD_QUEUECHAIN_SEL, |
| SCD_QUEUECHAIN_SEL_ALL(trans, trans_pcie)); |
| iwl_write_prph(trans, SCD_AGGR_SEL, 0); |
| |
| /* initiate the queues */ |
| for (i = 0; i < cfg(trans)->base_params->num_of_queues; i++) { |
| iwl_write_prph(trans, SCD_QUEUE_RDPTR(i), 0); |
| iwl_write_direct32(trans, HBUS_TARG_WRPTR, 0 | (i << 8)); |
| iwl_write_targ_mem(trans, trans_pcie->scd_base_addr + |
| SCD_CONTEXT_QUEUE_OFFSET(i), 0); |
| iwl_write_targ_mem(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(trans, SCD_INTERRUPT_MASK, |
| IWL_MASK(0, cfg(trans)->base_params->num_of_queues)); |
| |
| /* Activate all Tx DMA/FIFO channels */ |
| iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7)); |
| |
| iwl_trans_set_wr_ptrs(trans, trans_pcie->cmd_queue, 0); |
| |
| /* make sure all queue are not stopped/used */ |
| memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); |
| memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used)); |
| |
| for (i = 0; i < trans_pcie->n_q_to_fifo; i++) { |
| int fifo = trans_pcie->setup_q_to_fifo[i]; |
| |
| set_bit(i, trans_pcie->queue_used); |
| |
| iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i], |
| fifo, true); |
| } |
| |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| /* Enable L1-Active */ |
| iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, |
| APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
| } |
| |
| static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans) |
| { |
| iwl_reset_ict(trans); |
| iwl_tx_start(trans); |
| } |
| |
| /** |
| * iwlagn_txq_ctx_stop - Stop all Tx DMA channels |
| */ |
| static int iwl_trans_tx_stop(struct iwl_trans *trans) |
| { |
| int ch, txq_id, ret; |
| 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_pcie->irq_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(trans, |
| FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); |
| ret = iwl_poll_direct_bit(trans, FH_TSSR_TX_STATUS_REG, |
| FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), |
| 1000); |
| if (ret < 0) |
| IWL_ERR(trans, "Failing on timeout while stopping" |
| " DMA channel %d [0x%08x]", ch, |
| iwl_read_direct32(trans, |
| FH_TSSR_TX_STATUS_REG)); |
| } |
| spin_unlock_irqrestore(&trans_pcie->irq_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 < cfg(trans)->base_params->num_of_queues; |
| txq_id++) |
| iwl_tx_queue_unmap(trans, txq_id); |
| |
| return 0; |
| } |
| |
| static void iwl_trans_pcie_stop_device(struct iwl_trans *trans) |
| { |
| unsigned long flags; |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| /* tell the device to stop sending interrupts */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| /* 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_pcie->status)) { |
| iwl_trans_tx_stop(trans); |
| #ifndef CONFIG_IWLWIFI_IDI |
| iwl_trans_rx_stop(trans); |
| #endif |
| /* Power-down device's busmaster DMA clocks */ |
| iwl_write_prph(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(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(trans); |
| |
| /* Upon stop, the APM issues an interrupt if HW RF kill is set. |
| * Clean again the interrupt here |
| */ |
| spin_lock_irqsave(&trans_pcie->irq_lock, flags); |
| iwl_disable_interrupts(trans); |
| spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); |
| |
| /* wait to make sure we flush pending tasklet*/ |
| synchronize_irq(trans_pcie->irq); |
| tasklet_kill(&trans_pcie->irq_tasklet); |
| |
| cancel_work_sync(&trans_pcie->rx_replenish); |
| |
| /* stop and reset the on-board processor */ |
| iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); |
| } |
| |
| static void iwl_trans_pcie_wowlan_suspend(struct iwl_trans *trans) |
| { |
| /* let the ucode operate on its own */ |
| iwl_write32(trans, CSR_UCODE_DRV_GP1_SET, |
| CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); |
| |
| iwl_disable_interrupts(trans); |
| iwl_clear_bit(trans, CSR_GP_CNTRL, |
| CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| } |
| |
| static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, |
| struct iwl_device_cmd *dev_cmd, int txq_id) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
| 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; |
| u8 wait_write_ptr = 0; |
| __le16 fc = hdr->frame_control; |
| u8 hdr_len = ieee80211_hdrlen(fc); |
| u16 __maybe_unused wifi_seq; |
| |
| txq = &trans_pcie->txq[txq_id]; |
| q = &txq->q; |
| |
| if (unlikely(!test_bit(txq_id, trans_pcie->queue_used))) { |
| WARN_ON_ONCE(1); |
| return -EINVAL; |
| } |
| |
| spin_lock(&txq->lock); |
| |
| /* 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(trans->dev, |
| &dev_cmd->hdr, firstlen, |
| DMA_BIDIRECTIONAL); |
| if (unlikely(dma_mapping_error(trans->dev, txcmd_phys))) |
| goto out_err; |
| 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(trans->dev, skb->data + hdr_len, |
| secondlen, DMA_TO_DEVICE); |
| if (unlikely(dma_mapping_error(trans->dev, phys_addr))) { |
| dma_unmap_single(trans->dev, |
| dma_unmap_addr(out_meta, mapping), |
| dma_unmap_len(out_meta, len), |
| DMA_BIDIRECTIONAL); |
| goto out_err; |
| } |
| } |
| |
| /* 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(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)); |
| |
| /* Set up entry for this TFD in Tx byte-count array */ |
| iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len)); |
| |
| dma_sync_single_for_device(trans->dev, txcmd_phys, firstlen, |
| DMA_BIDIRECTIONAL); |
| |
| trace_iwlwifi_dev_tx(trans->dev, |
| &((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); |
| |
| /* |
| * 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); |
| } |
| } |
| spin_unlock(&txq->lock); |
| return 0; |
| out_err: |
| spin_unlock(&txq->lock); |
| return -1; |
| } |
| |
| static int iwl_trans_pcie_start_hw(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = |
| IWL_TRANS_GET_PCIE_TRANS(trans); |
| int err; |
| bool hw_rfkill; |
| |
| trans_pcie->inta_mask = CSR_INI_SET_MASK; |
| |
| if (!trans_pcie->irq_requested) { |
| tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long)) |
| iwl_irq_tasklet, (unsigned long)trans); |
| |
| iwl_alloc_isr_ict(trans); |
| |
| err = request_irq(trans_pcie->irq, iwl_isr_ict, IRQF_SHARED, |
| DRV_NAME, trans); |
| if (err) { |
| IWL_ERR(trans, "Error allocating IRQ %d\n", |
| trans_pcie->irq); |
| goto error; |
| } |
| |
| INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish); |
| trans_pcie->irq_requested = true; |
| } |
| |
| err = iwl_prepare_card_hw(trans); |
| if (err) { |
| IWL_ERR(trans, "Error while preparing HW: %d", err); |
| goto err_free_irq; |
| } |
| |
| iwl_apm_init(trans); |
| |
| hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) & |
| CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| |
| return err; |
| |
| err_free_irq: |
| free_irq(trans_pcie->irq, trans); |
| error: |
| iwl_free_isr_ict(trans); |
| tasklet_kill(&trans_pcie->irq_tasklet); |
| return err; |
| } |
| |
| static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans) |
| { |
| iwl_apm_stop(trans); |
| |
| iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
| |
| /* Even if we stop the HW, we still want the RF kill interrupt */ |
| iwl_enable_rfkill_int(trans); |
| } |
| |
| static void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn, |
| 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]; |
| /* n_bd is usually 256 => n_bd - 1 = 0xff */ |
| int tfd_num = ssn & (txq->q.n_bd - 1); |
| int freed = 0; |
| |
| spin_lock(&txq->lock); |
| |
| txq->time_stamp = jiffies; |
| |
| if (txq->q.read_ptr != tfd_num) { |
| IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d -> %d (%d)\n", |
| txq_id, txq->q.read_ptr, tfd_num, ssn); |
| freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs); |
| if (iwl_queue_space(&txq->q) > txq->q.low_mark) |
| iwl_wake_queue(trans, txq); |
| } |
| |
| spin_unlock(&txq->lock); |
| } |
| |
| static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val) |
| { |
| writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); |
| } |
| |
| static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val) |
| { |
| writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); |
| } |
| |
| static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs) |
| { |
| return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); |
| } |
| |
| static void iwl_trans_pcie_configure(struct iwl_trans *trans, |
| const struct iwl_trans_config *trans_cfg) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| trans_pcie->cmd_queue = trans_cfg->cmd_queue; |
| if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS)) |
| trans_pcie->n_no_reclaim_cmds = 0; |
| else |
| trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds; |
| if (trans_pcie->n_no_reclaim_cmds) |
| memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds, |
| trans_pcie->n_no_reclaim_cmds * sizeof(u8)); |
| |
| trans_pcie->n_q_to_fifo = trans_cfg->n_queue_to_fifo; |
| |
| if (WARN_ON(trans_pcie->n_q_to_fifo > IWL_MAX_HW_QUEUES)) |
| trans_pcie->n_q_to_fifo = IWL_MAX_HW_QUEUES; |
| |
| /* at least the command queue must be mapped */ |
| WARN_ON(!trans_pcie->n_q_to_fifo); |
| |
| memcpy(trans_pcie->setup_q_to_fifo, trans_cfg->queue_to_fifo, |
| trans_pcie->n_q_to_fifo * sizeof(u8)); |
| } |
| |
| static void iwl_trans_pcie_free(struct iwl_trans *trans) |
| { |
| struct iwl_trans_pcie *trans_pcie = |
| IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| iwl_trans_pcie_tx_free(trans); |
| #ifndef CONFIG_IWLWIFI_IDI |
| iwl_trans_pcie_rx_free(trans); |
| #endif |
| if (trans_pcie->irq_requested == true) { |
| free_irq(trans_pcie->irq, trans); |
| iwl_free_isr_ict(trans); |
| } |
| |
| pci_disable_msi(trans_pcie->pci_dev); |
| iounmap(trans_pcie->hw_base); |
| pci_release_regions(trans_pcie->pci_dev); |
| pci_disable_device(trans_pcie->pci_dev); |
| |
| trans->shrd->trans = NULL; |
| kfree(trans); |
| } |
| |
| static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state) |
| { |
| struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| if (state) |
| set_bit(STATUS_POWER_PMI, &trans_pcie->status); |
| else |
| clear_bit(STATUS_POWER_PMI, &trans_pcie->status); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
| { |
| return 0; |
| } |
| |
| static int iwl_trans_pcie_resume(struct iwl_trans *trans) |
| { |
| bool hw_rfkill; |
| |
| hw_rfkill = !(iwl_read32(trans, CSR_GP_CNTRL) & |
| CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); |
| |
| if (hw_rfkill) |
| iwl_enable_rfkill_int(trans); |
| else |
| iwl_enable_interrupts(trans); |
| |
| iwl_op_mode_hw_rf_kill(trans->op_mode, hw_rfkill); |
| |
| return 0; |
| } |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| #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 < cfg(trans)->base_params->num_of_queues; cnt++) { |
| if (cnt == trans_pcie->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 SW read_ptr %d write_ptr %d\n", |
| q->read_ptr, q->write_ptr); |
| IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n", |
| iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) |
| & (TFD_QUEUE_SIZE_MAX - 1), |
| iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt))); |
| 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(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(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(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); |
| |
| |
| #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 = simple_open, \ |
| .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 = simple_open, \ |
| .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 = simple_open, \ |
| .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; |
| size_t bufsz; |
| |
| bufsz = sizeof(char) * 64 * cfg(trans)->base_params->num_of_queues; |
| |
| 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 < cfg(trans)->base_params->num_of_queues; cnt++) { |
| txq = &trans_pcie->txq[cnt]; |
| q = &txq->q; |
| pos += scnprintf(buf + pos, bufsz - pos, |
| "hwq %.2d: read=%u write=%u use=%d stop=%d\n", |
| cnt, q->read_ptr, q->write_ptr, |
| !!test_bit(cnt, trans_pcie->queue_used), |
| !!test_bit(cnt, trans_pcie->queue_stopped)); |
| } |
| 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_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(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(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 = { |
| .start_hw = iwl_trans_pcie_start_hw, |
| .stop_hw = iwl_trans_pcie_stop_hw, |
| .fw_alive = iwl_trans_pcie_fw_alive, |
| .start_fw = iwl_trans_pcie_start_fw, |
| .stop_device = iwl_trans_pcie_stop_device, |
| |
| .wowlan_suspend = iwl_trans_pcie_wowlan_suspend, |
| |
| .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_setup = iwl_trans_pcie_tx_agg_setup, |
| |
| .free = iwl_trans_pcie_free, |
| |
| .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 |
| .write8 = iwl_trans_pcie_write8, |
| .write32 = iwl_trans_pcie_write32, |
| .read32 = iwl_trans_pcie_read32, |
| .configure = iwl_trans_pcie_configure, |
| .set_pmi = iwl_trans_pcie_set_pmi, |
| }; |
| |
| struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd, |
| struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| struct iwl_trans_pcie *trans_pcie; |
| struct iwl_trans *trans; |
| u16 pci_cmd; |
| int err; |
| |
| trans = kzalloc(sizeof(struct iwl_trans) + |
| sizeof(struct iwl_trans_pcie), GFP_KERNEL); |
| |
| if (WARN_ON(!trans)) |
| return NULL; |
| |
| trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| |
| trans->ops = &trans_ops_pcie; |
| trans->shrd = shrd; |
| trans_pcie->trans = trans; |
| spin_lock_init(&trans_pcie->irq_lock); |
| init_waitqueue_head(&trans_pcie->ucode_write_waitq); |
| |
| /* W/A - seems to solve weird behavior. We need to remove this if we |
| * don't want to stay in L1 all the time. This wastes a lot of power */ |
| pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | |
| PCIE_LINK_STATE_CLKPM); |
| |
| if (pci_enable_device(pdev)) { |
| err = -ENODEV; |
| goto out_no_pci; |
| } |
| |
| pci_set_master(pdev); |
| |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); |
| if (!err) |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); |
| if (err) { |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (!err) |
| err = pci_set_consistent_dma_mask(pdev, |
| DMA_BIT_MASK(32)); |
| /* both attempts failed: */ |
| if (err) { |
| dev_printk(KERN_ERR, &pdev->dev, |
| "No suitable DMA available.\n"); |
| goto out_pci_disable_device; |
| } |
| } |
| |
| err = pci_request_regions(pdev, DRV_NAME); |
| if (err) { |
| dev_printk(KERN_ERR, &pdev->dev, "pci_request_regions failed"); |
| goto out_pci_disable_device; |
| } |
| |
| trans_pcie->hw_base = pci_ioremap_bar(pdev, 0); |
| if (!trans_pcie->hw_base) { |
| dev_printk(KERN_ERR, &pdev->dev, "pci_ioremap_bar failed"); |
| err = -ENODEV; |
| goto out_pci_release_regions; |
| } |
| |
| dev_printk(KERN_INFO, &pdev->dev, |
| "pci_resource_len = 0x%08llx\n", |
| (unsigned long long) pci_resource_len(pdev, 0)); |
| dev_printk(KERN_INFO, &pdev->dev, |
| "pci_resource_base = %p\n", trans_pcie->hw_base); |
| |
| dev_printk(KERN_INFO, &pdev->dev, |
| "HW Revision ID = 0x%X\n", pdev->revision); |
| |
| /* We disable the RETRY_TIMEOUT register (0x41) to keep |
| * PCI Tx retries from interfering with C3 CPU state */ |
| pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); |
| |
| err = pci_enable_msi(pdev); |
| if (err) |
| dev_printk(KERN_ERR, &pdev->dev, |
| "pci_enable_msi failed(0X%x)", err); |
| |
| trans->dev = &pdev->dev; |
| trans_pcie->irq = pdev->irq; |
| trans_pcie->pci_dev = pdev; |
| trans->hw_rev = iwl_read32(trans, CSR_HW_REV); |
| trans->hw_id = (pdev->device << 16) + pdev->subsystem_device; |
| snprintf(trans->hw_id_str, sizeof(trans->hw_id_str), |
| "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device); |
| |
| /* TODO: Move this away, not needed if not MSI */ |
| /* enable rfkill interrupt: hw bug w/a */ |
| pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd); |
| if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { |
| pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; |
| pci_write_config_word(pdev, PCI_COMMAND, pci_cmd); |
| } |
| |
| /* Initialize the wait queue for commands */ |
| init_waitqueue_head(&trans->wait_command_queue); |
| |
| return trans; |
| |
| out_pci_release_regions: |
| pci_release_regions(pdev); |
| out_pci_disable_device: |
| pci_disable_device(pdev); |
| out_no_pci: |
| kfree(trans); |
| return NULL; |
| } |
| |