Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 4 | * redistributing this file, you may do so under either license. |
| 5 | * |
| 6 | * GPL LICENSE SUMMARY |
| 7 | * |
| 8 | * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of version 2 of the GNU General Public License as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| 22 | * USA |
| 23 | * |
| 24 | * The full GNU General Public License is included in this distribution |
| 25 | * in the file called LICENSE.GPL. |
| 26 | * |
| 27 | * Contact Information: |
| 28 | * Intel Linux Wireless <ilw@linux.intel.com> |
| 29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 30 | * |
| 31 | * BSD LICENSE |
| 32 | * |
| 33 | * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. |
| 34 | * All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * |
| 40 | * * Redistributions of source code must retain the above copyright |
| 41 | * notice, this list of conditions and the following disclaimer. |
| 42 | * * Redistributions in binary form must reproduce the above copyright |
| 43 | * notice, this list of conditions and the following disclaimer in |
| 44 | * the documentation and/or other materials provided with the |
| 45 | * distribution. |
| 46 | * * Neither the name Intel Corporation nor the names of its |
| 47 | * contributors may be used to endorse or promote products derived |
| 48 | * from this software without specific prior written permission. |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 61 | * |
| 62 | *****************************************************************************/ |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 63 | #include <linux/interrupt.h> |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 64 | #include <linux/debugfs.h> |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 65 | #include <linux/bitops.h> |
| 66 | #include <linux/gfp.h> |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 67 | |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 68 | #include "iwl-dev.h" |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 69 | #include "iwl-trans.h" |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 70 | #include "iwl-core.h" |
| 71 | #include "iwl-helpers.h" |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 72 | #include "iwl-trans-int-pcie.h" |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 73 | /*TODO remove uneeded includes when the transport layer tx_free will be here */ |
| 74 | #include "iwl-agn.h" |
Emmanuel Grumbach | e419d62 | 2011-07-08 08:46:14 -0700 | [diff] [blame] | 75 | #include "iwl-core.h" |
Emmanuel Grumbach | 48f20d3 | 2011-08-25 23:10:36 -0700 | [diff] [blame] | 76 | #include "iwl-shared.h" |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 77 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 78 | static int iwl_trans_rx_alloc(struct iwl_trans *trans) |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 79 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 80 | struct iwl_trans_pcie *trans_pcie = |
| 81 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 82 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
| 83 | struct device *dev = bus(trans)->dev; |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 84 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 85 | memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq)); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 86 | |
| 87 | spin_lock_init(&rxq->lock); |
| 88 | INIT_LIST_HEAD(&rxq->rx_free); |
| 89 | INIT_LIST_HEAD(&rxq->rx_used); |
| 90 | |
| 91 | if (WARN_ON(rxq->bd || rxq->rb_stts)) |
| 92 | return -EINVAL; |
| 93 | |
| 94 | /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */ |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 95 | rxq->bd = dma_alloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, |
| 96 | &rxq->bd_dma, GFP_KERNEL); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 97 | if (!rxq->bd) |
| 98 | goto err_bd; |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 99 | memset(rxq->bd, 0, sizeof(__le32) * RX_QUEUE_SIZE); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 100 | |
| 101 | /*Allocate the driver's pointer to receive buffer status */ |
| 102 | rxq->rb_stts = dma_alloc_coherent(dev, sizeof(*rxq->rb_stts), |
| 103 | &rxq->rb_stts_dma, GFP_KERNEL); |
| 104 | if (!rxq->rb_stts) |
| 105 | goto err_rb_stts; |
| 106 | memset(rxq->rb_stts, 0, sizeof(*rxq->rb_stts)); |
| 107 | |
| 108 | return 0; |
| 109 | |
| 110 | err_rb_stts: |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 111 | dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, |
| 112 | rxq->bd, rxq->bd_dma); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 113 | memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); |
| 114 | rxq->bd = NULL; |
| 115 | err_bd: |
| 116 | return -ENOMEM; |
| 117 | } |
| 118 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 119 | static void iwl_trans_rxq_free_rx_bufs(struct iwl_trans *trans) |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 120 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 121 | struct iwl_trans_pcie *trans_pcie = |
| 122 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 123 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 124 | int i; |
| 125 | |
| 126 | /* Fill the rx_used queue with _all_ of the Rx buffers */ |
| 127 | for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { |
| 128 | /* In the reset function, these buffers may have been allocated |
| 129 | * to an SKB, so we need to unmap and free potential storage */ |
| 130 | if (rxq->pool[i].page != NULL) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 131 | dma_unmap_page(bus(trans)->dev, rxq->pool[i].page_dma, |
| 132 | PAGE_SIZE << hw_params(trans).rx_page_order, |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 133 | DMA_FROM_DEVICE); |
Emmanuel Grumbach | 790428b | 2011-08-25 23:11:05 -0700 | [diff] [blame] | 134 | __free_pages(rxq->pool[i].page, |
| 135 | hw_params(trans).rx_page_order); |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 136 | rxq->pool[i].page = NULL; |
| 137 | } |
| 138 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); |
| 139 | } |
| 140 | } |
| 141 | |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 142 | static void iwl_trans_rx_hw_init(struct iwl_priv *priv, |
| 143 | struct iwl_rx_queue *rxq) |
| 144 | { |
| 145 | u32 rb_size; |
| 146 | const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ |
| 147 | u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */ |
| 148 | |
| 149 | rb_timeout = RX_RB_TIMEOUT; |
| 150 | |
| 151 | if (iwlagn_mod_params.amsdu_size_8K) |
| 152 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; |
| 153 | else |
| 154 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; |
| 155 | |
| 156 | /* Stop Rx DMA */ |
| 157 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| 158 | |
| 159 | /* Reset driver's Rx queue write index */ |
| 160 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); |
| 161 | |
| 162 | /* Tell device where to find RBD circular buffer in DRAM */ |
| 163 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, |
| 164 | (u32)(rxq->bd_dma >> 8)); |
| 165 | |
| 166 | /* Tell device where in DRAM to update its Rx status */ |
| 167 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, |
| 168 | rxq->rb_stts_dma >> 4); |
| 169 | |
| 170 | /* Enable Rx DMA |
| 171 | * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in |
| 172 | * the credit mechanism in 5000 HW RX FIFO |
| 173 | * Direct rx interrupts to hosts |
| 174 | * Rx buffer size 4 or 8k |
| 175 | * RB timeout 0x10 |
| 176 | * 256 RBDs |
| 177 | */ |
| 178 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, |
| 179 | FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | |
| 180 | FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY | |
| 181 | FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | |
| 182 | FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | |
| 183 | rb_size| |
| 184 | (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)| |
| 185 | (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); |
| 186 | |
| 187 | /* Set interrupt coalescing timer to default (2048 usecs) */ |
| 188 | iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); |
| 189 | } |
| 190 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 191 | static int iwl_rx_init(struct iwl_trans *trans) |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 192 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 193 | struct iwl_trans_pcie *trans_pcie = |
| 194 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 195 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
| 196 | |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 197 | int i, err; |
| 198 | unsigned long flags; |
| 199 | |
| 200 | if (!rxq->bd) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 201 | err = iwl_trans_rx_alloc(trans); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 202 | if (err) |
| 203 | return err; |
| 204 | } |
| 205 | |
| 206 | spin_lock_irqsave(&rxq->lock, flags); |
| 207 | INIT_LIST_HEAD(&rxq->rx_free); |
| 208 | INIT_LIST_HEAD(&rxq->rx_used); |
| 209 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 210 | iwl_trans_rxq_free_rx_bufs(trans); |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 211 | |
| 212 | for (i = 0; i < RX_QUEUE_SIZE; i++) |
| 213 | rxq->queue[i] = NULL; |
| 214 | |
| 215 | /* Set us so that we have processed and used all buffers, but have |
| 216 | * not restocked the Rx queue with fresh buffers */ |
| 217 | rxq->read = rxq->write = 0; |
| 218 | rxq->write_actual = 0; |
| 219 | rxq->free_count = 0; |
| 220 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 221 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 222 | iwlagn_rx_replenish(trans); |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 223 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 224 | iwl_trans_rx_hw_init(priv(trans), rxq); |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 225 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 226 | spin_lock_irqsave(&trans->shrd->lock, flags); |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 227 | rxq->need_update = 1; |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 228 | iwl_rx_queue_update_write_ptr(trans, rxq); |
| 229 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
Emmanuel Grumbach | ab697a9 | 2011-07-11 07:35:34 -0700 | [diff] [blame] | 230 | |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 231 | return 0; |
| 232 | } |
| 233 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 234 | static void iwl_trans_pcie_rx_free(struct iwl_trans *trans) |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 235 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 236 | struct iwl_trans_pcie *trans_pcie = |
| 237 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 238 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
| 239 | |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 240 | unsigned long flags; |
| 241 | |
| 242 | /*if rxq->bd is NULL, it means that nothing has been allocated, |
| 243 | * exit now */ |
| 244 | if (!rxq->bd) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 245 | IWL_DEBUG_INFO(trans, "Free NULL rx context\n"); |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 246 | return; |
| 247 | } |
| 248 | |
| 249 | spin_lock_irqsave(&rxq->lock, flags); |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 250 | iwl_trans_rxq_free_rx_bufs(trans); |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 251 | spin_unlock_irqrestore(&rxq->lock, flags); |
| 252 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 253 | dma_free_coherent(bus(trans)->dev, sizeof(__le32) * RX_QUEUE_SIZE, |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 254 | rxq->bd, rxq->bd_dma); |
| 255 | memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); |
| 256 | rxq->bd = NULL; |
| 257 | |
| 258 | if (rxq->rb_stts) |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 259 | dma_free_coherent(bus(trans)->dev, |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 260 | sizeof(struct iwl_rb_status), |
| 261 | rxq->rb_stts, rxq->rb_stts_dma); |
| 262 | else |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 263 | IWL_DEBUG_INFO(trans, "Free rxq->rb_stts which is NULL\n"); |
Emmanuel Grumbach | a0f6b0a | 2011-06-21 14:25:45 +0300 | [diff] [blame] | 264 | memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma)); |
| 265 | rxq->rb_stts = NULL; |
| 266 | } |
| 267 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 268 | static int iwl_trans_rx_stop(struct iwl_trans *trans) |
Emmanuel Grumbach | c2c52e8 | 2011-07-08 08:46:11 -0700 | [diff] [blame] | 269 | { |
| 270 | |
| 271 | /* stop Rx DMA */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 272 | iwl_write_direct32(priv(trans), FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
| 273 | return iwl_poll_direct_bit(priv(trans), FH_MEM_RSSR_RX_STATUS_REG, |
Emmanuel Grumbach | c2c52e8 | 2011-07-08 08:46:11 -0700 | [diff] [blame] | 274 | FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); |
| 275 | } |
| 276 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 277 | static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 278 | struct iwl_dma_ptr *ptr, size_t size) |
| 279 | { |
| 280 | if (WARN_ON(ptr->addr)) |
| 281 | return -EINVAL; |
| 282 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 283 | ptr->addr = dma_alloc_coherent(bus(trans)->dev, size, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 284 | &ptr->dma, GFP_KERNEL); |
| 285 | if (!ptr->addr) |
| 286 | return -ENOMEM; |
| 287 | ptr->size = size; |
| 288 | return 0; |
| 289 | } |
| 290 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 291 | static inline void iwlagn_free_dma_ptr(struct iwl_trans *trans, |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 292 | struct iwl_dma_ptr *ptr) |
| 293 | { |
| 294 | if (unlikely(!ptr->addr)) |
| 295 | return; |
| 296 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 297 | dma_free_coherent(bus(trans)->dev, ptr->size, ptr->addr, ptr->dma); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 298 | memset(ptr, 0, sizeof(*ptr)); |
| 299 | } |
| 300 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 301 | static int iwl_trans_txq_alloc(struct iwl_trans *trans, |
| 302 | struct iwl_tx_queue *txq, int slots_num, |
| 303 | u32 txq_id) |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 304 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 305 | size_t tfd_sz = hw_params(trans).tfd_size * TFD_QUEUE_SIZE_MAX; |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 306 | int i; |
| 307 | |
| 308 | if (WARN_ON(txq->meta || txq->cmd || txq->txb || txq->tfds)) |
| 309 | return -EINVAL; |
| 310 | |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 311 | txq->q.n_window = slots_num; |
| 312 | |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 313 | txq->meta = kzalloc(sizeof(txq->meta[0]) * slots_num, |
| 314 | GFP_KERNEL); |
| 315 | txq->cmd = kzalloc(sizeof(txq->cmd[0]) * slots_num, |
| 316 | GFP_KERNEL); |
| 317 | |
| 318 | if (!txq->meta || !txq->cmd) |
| 319 | goto error; |
| 320 | |
| 321 | for (i = 0; i < slots_num; i++) { |
| 322 | txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd), |
| 323 | GFP_KERNEL); |
| 324 | if (!txq->cmd[i]) |
| 325 | goto error; |
| 326 | } |
| 327 | |
| 328 | /* Alloc driver data array and TFD circular buffer */ |
| 329 | /* Driver private data, only for Tx (not command) queues, |
| 330 | * not shared with device. */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 331 | if (txq_id != trans->shrd->cmd_queue) { |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 332 | txq->txb = kzalloc(sizeof(txq->txb[0]) * |
| 333 | TFD_QUEUE_SIZE_MAX, GFP_KERNEL); |
| 334 | if (!txq->txb) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 335 | IWL_ERR(trans, "kmalloc for auxiliary BD " |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 336 | "structures failed\n"); |
| 337 | goto error; |
| 338 | } |
| 339 | } else { |
| 340 | txq->txb = NULL; |
| 341 | } |
| 342 | |
| 343 | /* Circular buffer of transmit frame descriptors (TFDs), |
| 344 | * shared with device */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 345 | txq->tfds = dma_alloc_coherent(bus(trans)->dev, tfd_sz, |
| 346 | &txq->q.dma_addr, GFP_KERNEL); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 347 | if (!txq->tfds) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 348 | IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 349 | goto error; |
| 350 | } |
| 351 | txq->q.id = txq_id; |
| 352 | |
| 353 | return 0; |
| 354 | error: |
| 355 | kfree(txq->txb); |
| 356 | txq->txb = NULL; |
| 357 | /* since txq->cmd has been zeroed, |
| 358 | * all non allocated cmd[i] will be NULL */ |
| 359 | if (txq->cmd) |
| 360 | for (i = 0; i < slots_num; i++) |
| 361 | kfree(txq->cmd[i]); |
| 362 | kfree(txq->meta); |
| 363 | kfree(txq->cmd); |
| 364 | txq->meta = NULL; |
| 365 | txq->cmd = NULL; |
| 366 | |
| 367 | return -ENOMEM; |
| 368 | |
| 369 | } |
| 370 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 371 | static int iwl_trans_txq_init(struct iwl_trans *trans, struct iwl_tx_queue *txq, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 372 | int slots_num, u32 txq_id) |
| 373 | { |
| 374 | int ret; |
| 375 | |
| 376 | txq->need_update = 0; |
| 377 | memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num); |
| 378 | |
| 379 | /* |
| 380 | * For the default queues 0-3, set up the swq_id |
| 381 | * already -- all others need to get one later |
| 382 | * (if they need one at all). |
| 383 | */ |
| 384 | if (txq_id < 4) |
| 385 | iwl_set_swq_id(txq, txq_id, txq_id); |
| 386 | |
| 387 | /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise |
| 388 | * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ |
| 389 | BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); |
| 390 | |
| 391 | /* Initialize queue's high/low-water marks, and head/tail indexes */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 392 | ret = iwl_queue_init(&txq->q, TFD_QUEUE_SIZE_MAX, slots_num, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 393 | txq_id); |
| 394 | if (ret) |
| 395 | return ret; |
| 396 | |
| 397 | /* |
| 398 | * Tell nic where to find circular buffer of Tx Frame Descriptors for |
| 399 | * given Tx queue, and enable the DMA channel used for that queue. |
| 400 | * Circular buffer (TFD queue in DRAM) physical base address */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 401 | iwl_write_direct32(priv(trans), FH_MEM_CBBC_QUEUE(txq_id), |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 402 | txq->q.dma_addr >> 8); |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | /** |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 408 | * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's |
| 409 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 410 | static void iwl_tx_queue_unmap(struct iwl_trans *trans, int txq_id) |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 411 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 412 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 413 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; |
| 414 | struct iwl_queue *q = &txq->q; |
| 415 | |
| 416 | if (!q->n_bd) |
| 417 | return; |
| 418 | |
| 419 | while (q->write_ptr != q->read_ptr) { |
| 420 | /* The read_ptr needs to bound by q->n_window */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 421 | iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr)); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 422 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | /** |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 427 | * iwl_tx_queue_free - Deallocate DMA queue. |
| 428 | * @txq: Transmit queue to deallocate. |
| 429 | * |
| 430 | * Empty queue by removing and destroying all BD's. |
| 431 | * Free all buffers. |
| 432 | * 0-fill, but do not free "txq" descriptor structure. |
| 433 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 434 | static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id) |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 435 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 436 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 437 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 438 | struct device *dev = bus(trans)->dev; |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 439 | int i; |
| 440 | if (WARN_ON(!txq)) |
| 441 | return; |
| 442 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 443 | iwl_tx_queue_unmap(trans, txq_id); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 444 | |
| 445 | /* De-alloc array of command/tx buffers */ |
| 446 | for (i = 0; i < txq->q.n_window; i++) |
| 447 | kfree(txq->cmd[i]); |
| 448 | |
| 449 | /* De-alloc circular buffer of TFDs */ |
| 450 | if (txq->q.n_bd) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 451 | dma_free_coherent(dev, hw_params(trans).tfd_size * |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 452 | txq->q.n_bd, txq->tfds, txq->q.dma_addr); |
| 453 | memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr)); |
| 454 | } |
| 455 | |
| 456 | /* De-alloc array of per-TFD driver data */ |
| 457 | kfree(txq->txb); |
| 458 | txq->txb = NULL; |
| 459 | |
| 460 | /* deallocate arrays */ |
| 461 | kfree(txq->cmd); |
| 462 | kfree(txq->meta); |
| 463 | txq->cmd = NULL; |
| 464 | txq->meta = NULL; |
| 465 | |
| 466 | /* 0-fill queue descriptor structure */ |
| 467 | memset(txq, 0, sizeof(*txq)); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * iwl_trans_tx_free - Free TXQ Context |
| 472 | * |
| 473 | * Destroy all TX DMA queues and structures |
| 474 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 475 | static void iwl_trans_pcie_tx_free(struct iwl_trans *trans) |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 476 | { |
| 477 | int txq_id; |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 478 | struct iwl_trans_pcie *trans_pcie = |
| 479 | IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 480 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 481 | |
| 482 | /* Tx queues */ |
| 483 | if (priv->txq) { |
Emmanuel Grumbach | d618912 | 2011-08-25 23:10:39 -0700 | [diff] [blame] | 484 | for (txq_id = 0; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 485 | txq_id < hw_params(trans).max_txq_num; txq_id++) |
| 486 | iwl_tx_queue_free(trans, txq_id); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | kfree(priv->txq); |
| 490 | priv->txq = NULL; |
| 491 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 492 | iwlagn_free_dma_ptr(trans, &priv->kw); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 493 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 494 | iwlagn_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls); |
Emmanuel Grumbach | 1359ca4 | 2011-07-08 08:46:10 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /** |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 498 | * iwl_trans_tx_alloc - allocate TX context |
| 499 | * Allocate all Tx DMA structures and initialize them |
| 500 | * |
| 501 | * @param priv |
| 502 | * @return error code |
| 503 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 504 | static int iwl_trans_tx_alloc(struct iwl_trans *trans) |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 505 | { |
| 506 | int ret; |
| 507 | int txq_id, slots_num; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 508 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 509 | struct iwl_trans_pcie *trans_pcie = |
| 510 | IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 511 | |
| 512 | /*It is not allowed to alloc twice, so warn when this happens. |
| 513 | * We cannot rely on the previous allocation, so free and fail */ |
| 514 | if (WARN_ON(priv->txq)) { |
| 515 | ret = -EINVAL; |
| 516 | goto error; |
| 517 | } |
| 518 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 519 | ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls, |
| 520 | hw_params(trans).scd_bc_tbls_size); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 521 | if (ret) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 522 | IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 523 | goto error; |
| 524 | } |
| 525 | |
| 526 | /* Alloc keep-warm buffer */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 527 | ret = iwlagn_alloc_dma_ptr(trans, &priv->kw, IWL_KW_SIZE); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 528 | if (ret) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 529 | IWL_ERR(trans, "Keep Warm allocation failed\n"); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 530 | goto error; |
| 531 | } |
| 532 | |
| 533 | priv->txq = kzalloc(sizeof(struct iwl_tx_queue) * |
| 534 | priv->cfg->base_params->num_of_queues, GFP_KERNEL); |
| 535 | if (!priv->txq) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 536 | IWL_ERR(trans, "Not enough memory for txq\n"); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 537 | ret = ENOMEM; |
| 538 | goto error; |
| 539 | } |
| 540 | |
| 541 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 542 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) { |
| 543 | slots_num = (txq_id == trans->shrd->cmd_queue) ? |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 544 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 545 | ret = iwl_trans_txq_alloc(trans, &priv->txq[txq_id], slots_num, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 546 | txq_id); |
| 547 | if (ret) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 548 | IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 549 | goto error; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | return 0; |
| 554 | |
| 555 | error: |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 556 | iwl_trans_tx_free(trans); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 557 | |
| 558 | return ret; |
| 559 | } |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 560 | static int iwl_tx_init(struct iwl_trans *trans) |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 561 | { |
| 562 | int ret; |
| 563 | int txq_id, slots_num; |
| 564 | unsigned long flags; |
| 565 | bool alloc = false; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 566 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 567 | |
| 568 | if (!priv->txq) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 569 | ret = iwl_trans_tx_alloc(trans); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 570 | if (ret) |
| 571 | goto error; |
| 572 | alloc = true; |
| 573 | } |
| 574 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 575 | spin_lock_irqsave(&trans->shrd->lock, flags); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 576 | |
| 577 | /* Turn off all Tx DMA fifos */ |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 578 | iwl_write_prph(priv, SCD_TXFACT, 0); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 579 | |
| 580 | /* Tell NIC where to find the "keep warm" buffer */ |
| 581 | iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4); |
| 582 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 583 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 584 | |
| 585 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 586 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) { |
| 587 | slots_num = (txq_id == trans->shrd->cmd_queue) ? |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 588 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 589 | ret = iwl_trans_txq_init(trans, &priv->txq[txq_id], slots_num, |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 590 | txq_id); |
| 591 | if (ret) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 592 | IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 593 | goto error; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | return 0; |
| 598 | error: |
| 599 | /*Upon error, free only if we allocated something */ |
| 600 | if (alloc) |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 601 | iwl_trans_tx_free(trans); |
Emmanuel Grumbach | 02aca58 | 2011-06-28 08:58:41 -0700 | [diff] [blame] | 602 | return ret; |
| 603 | } |
| 604 | |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 605 | static void iwl_set_pwr_vmain(struct iwl_priv *priv) |
| 606 | { |
| 607 | /* |
| 608 | * (for documentation purposes) |
| 609 | * to set power to V_AUX, do: |
| 610 | |
| 611 | if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) |
| 612 | iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, |
| 613 | APMG_PS_CTRL_VAL_PWR_SRC_VAUX, |
| 614 | ~APMG_PS_CTRL_MSK_PWR_SRC); |
| 615 | */ |
| 616 | |
| 617 | iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG, |
| 618 | APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, |
| 619 | ~APMG_PS_CTRL_MSK_PWR_SRC); |
| 620 | } |
| 621 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 622 | static int iwl_nic_init(struct iwl_trans *trans) |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 623 | { |
| 624 | unsigned long flags; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 625 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 626 | |
| 627 | /* nic_init */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 628 | spin_lock_irqsave(&trans->shrd->lock, flags); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 629 | iwl_apm_init(priv); |
| 630 | |
| 631 | /* Set interrupt coalescing calibration timer to default (512 usecs) */ |
| 632 | iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); |
| 633 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 634 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 635 | |
| 636 | iwl_set_pwr_vmain(priv); |
| 637 | |
| 638 | priv->cfg->lib->nic_config(priv); |
| 639 | |
| 640 | /* Allocate the RX queue, or reset if it is already allocated */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 641 | iwl_rx_init(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 642 | |
| 643 | /* Allocate or reset and init all Tx and Command queues */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 644 | if (iwl_tx_init(trans)) |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 645 | return -ENOMEM; |
| 646 | |
| 647 | if (priv->cfg->base_params->shadow_reg_enable) { |
| 648 | /* enable shadow regs in HW */ |
| 649 | iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL, |
| 650 | 0x800FFFFF); |
| 651 | } |
| 652 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 653 | set_bit(STATUS_INIT, &trans->shrd->status); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 654 | |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | #define HW_READY_TIMEOUT (50) |
| 659 | |
| 660 | /* Note: returns poll_bit return value, which is >= 0 if success */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 661 | static int iwl_set_hw_ready(struct iwl_trans *trans) |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 662 | { |
| 663 | int ret; |
| 664 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 665 | iwl_set_bit(priv(trans), CSR_HW_IF_CONFIG_REG, |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 666 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); |
| 667 | |
| 668 | /* See if we got it */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 669 | ret = iwl_poll_bit(priv(trans), CSR_HW_IF_CONFIG_REG, |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 670 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, |
| 671 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, |
| 672 | HW_READY_TIMEOUT); |
| 673 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 674 | IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : ""); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 675 | return ret; |
| 676 | } |
| 677 | |
| 678 | /* Note: returns standard 0/-ERROR code */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 679 | static int iwl_trans_pcie_prepare_card_hw(struct iwl_trans *trans) |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 680 | { |
| 681 | int ret; |
| 682 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 683 | IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n"); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 684 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 685 | ret = iwl_set_hw_ready(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 686 | if (ret >= 0) |
| 687 | return 0; |
| 688 | |
| 689 | /* If HW is not ready, prepare the conditions to check again */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 690 | iwl_set_bit(priv(trans), CSR_HW_IF_CONFIG_REG, |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 691 | CSR_HW_IF_CONFIG_REG_PREPARE); |
| 692 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 693 | ret = iwl_poll_bit(priv(trans), CSR_HW_IF_CONFIG_REG, |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 694 | ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, |
| 695 | CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); |
| 696 | |
| 697 | if (ret < 0) |
| 698 | return ret; |
| 699 | |
| 700 | /* HW should be ready by now, check again. */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 701 | ret = iwl_set_hw_ready(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 702 | if (ret >= 0) |
| 703 | return 0; |
| 704 | return ret; |
| 705 | } |
| 706 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 707 | static int iwl_trans_pcie_start_device(struct iwl_trans *trans) |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 708 | { |
| 709 | int ret; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 710 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 711 | |
| 712 | priv->ucode_owner = IWL_OWNERSHIP_DRIVER; |
| 713 | |
| 714 | if ((priv->cfg->sku & EEPROM_SKU_CAP_AMT_ENABLE) && |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 715 | iwl_trans_pcie_prepare_card_hw(trans)) { |
| 716 | IWL_WARN(trans, "Exit HW not ready\n"); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 717 | return -EIO; |
| 718 | } |
| 719 | |
| 720 | /* If platform's RF_KILL switch is NOT set to KILL */ |
| 721 | if (iwl_read32(priv, CSR_GP_CNTRL) & |
| 722 | CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 723 | clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 724 | else |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 725 | set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 726 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 727 | if (iwl_is_rfkill(trans->shrd)) { |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 728 | wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 729 | iwl_enable_interrupts(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 730 | return -ERFKILL; |
| 731 | } |
| 732 | |
| 733 | iwl_write32(priv, CSR_INT, 0xFFFFFFFF); |
| 734 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 735 | ret = iwl_nic_init(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 736 | if (ret) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 737 | IWL_ERR(trans, "Unable to init nic\n"); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 738 | return ret; |
| 739 | } |
| 740 | |
| 741 | /* make sure rfkill handshake bits are cleared */ |
| 742 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| 743 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, |
| 744 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
| 745 | |
| 746 | /* clear (again), then enable host interrupts */ |
| 747 | iwl_write32(priv, CSR_INT, 0xFFFFFFFF); |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 748 | iwl_enable_interrupts(trans); |
Emmanuel Grumbach | 392f8b7 | 2011-07-10 15:30:15 +0300 | [diff] [blame] | 749 | |
| 750 | /* really make sure rfkill handshake bits are cleared */ |
| 751 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| 752 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
| 753 | |
| 754 | return 0; |
| 755 | } |
| 756 | |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 757 | /* |
| 758 | * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask |
Emmanuel Grumbach | 10b15e6 | 2011-08-25 23:10:43 -0700 | [diff] [blame] | 759 | * must be called under priv->shrd->lock and mac access |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 760 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 761 | static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask) |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 762 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 763 | iwl_write_prph(priv(trans), SCD_TXFACT, mask); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | #define IWL_AC_UNSET -1 |
| 767 | |
| 768 | struct queue_to_fifo_ac { |
| 769 | s8 fifo, ac; |
| 770 | }; |
| 771 | |
| 772 | static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = { |
| 773 | { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, |
| 774 | { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, |
| 775 | { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, |
| 776 | { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, |
| 777 | { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, |
| 778 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
| 779 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
| 780 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
| 781 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
| 782 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
Johannes Berg | 72c04ce | 2011-07-23 10:24:40 -0700 | [diff] [blame] | 783 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 784 | }; |
| 785 | |
| 786 | static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = { |
| 787 | { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, |
| 788 | { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, |
| 789 | { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, |
| 790 | { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, |
| 791 | { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, }, |
| 792 | { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, }, |
| 793 | { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, }, |
| 794 | { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, }, |
| 795 | { IWL_TX_FIFO_BE_IPAN, 2, }, |
| 796 | { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, |
Johannes Berg | 72c04ce | 2011-07-23 10:24:40 -0700 | [diff] [blame] | 797 | { IWL_TX_FIFO_AUX, IWL_AC_UNSET, }, |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 798 | }; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 799 | static void iwl_trans_pcie_tx_start(struct iwl_trans *trans) |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 800 | { |
| 801 | const struct queue_to_fifo_ac *queue_to_fifo; |
| 802 | struct iwl_rxon_context *ctx; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 803 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 804 | struct iwl_trans_pcie *trans_pcie = |
| 805 | IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 806 | u32 a; |
| 807 | unsigned long flags; |
| 808 | int i, chan; |
| 809 | u32 reg_val; |
| 810 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 811 | spin_lock_irqsave(&trans->shrd->lock, flags); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 812 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 813 | trans_pcie->scd_base_addr = iwl_read_prph(priv, SCD_SRAM_BASE_ADDR); |
| 814 | a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND; |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 815 | /* reset conext data memory */ |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 816 | for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND; |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 817 | a += 4) |
| 818 | iwl_write_targ_mem(priv, a, 0); |
| 819 | /* reset tx status memory */ |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 820 | for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND; |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 821 | a += 4) |
| 822 | iwl_write_targ_mem(priv, a, 0); |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 823 | for (; a < trans_pcie->scd_base_addr + |
Emmanuel Grumbach | d618912 | 2011-08-25 23:10:39 -0700 | [diff] [blame] | 824 | SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(priv).max_txq_num); |
| 825 | a += 4) |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 826 | iwl_write_targ_mem(priv, a, 0); |
| 827 | |
| 828 | iwl_write_prph(priv, SCD_DRAM_BASE_ADDR, |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 829 | trans_pcie->scd_bc_tbls.dma >> 10); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 830 | |
| 831 | /* Enable DMA channel */ |
| 832 | for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++) |
| 833 | iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan), |
| 834 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | |
| 835 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); |
| 836 | |
| 837 | /* Update FH chicken bits */ |
| 838 | reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG); |
| 839 | iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG, |
| 840 | reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); |
| 841 | |
| 842 | iwl_write_prph(priv, SCD_QUEUECHAIN_SEL, |
| 843 | SCD_QUEUECHAIN_SEL_ALL(priv)); |
| 844 | iwl_write_prph(priv, SCD_AGGR_SEL, 0); |
| 845 | |
| 846 | /* initiate the queues */ |
Emmanuel Grumbach | d618912 | 2011-08-25 23:10:39 -0700 | [diff] [blame] | 847 | for (i = 0; i < hw_params(priv).max_txq_num; i++) { |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 848 | iwl_write_prph(priv, SCD_QUEUE_RDPTR(i), 0); |
| 849 | iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8)); |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 850 | iwl_write_targ_mem(priv, trans_pcie->scd_base_addr + |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 851 | SCD_CONTEXT_QUEUE_OFFSET(i), 0); |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 852 | iwl_write_targ_mem(priv, trans_pcie->scd_base_addr + |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 853 | SCD_CONTEXT_QUEUE_OFFSET(i) + |
| 854 | sizeof(u32), |
| 855 | ((SCD_WIN_SIZE << |
| 856 | SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & |
| 857 | SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | |
| 858 | ((SCD_FRAME_LIMIT << |
| 859 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & |
| 860 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); |
| 861 | } |
| 862 | |
| 863 | iwl_write_prph(priv, SCD_INTERRUPT_MASK, |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 864 | IWL_MASK(0, hw_params(trans).max_txq_num)); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 865 | |
| 866 | /* Activate all Tx DMA/FIFO channels */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 867 | iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7)); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 868 | |
| 869 | /* map queues to FIFOs */ |
| 870 | if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)) |
| 871 | queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo; |
| 872 | else |
| 873 | queue_to_fifo = iwlagn_default_queue_to_tx_fifo; |
| 874 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 875 | iwl_trans_set_wr_ptrs(trans, trans->shrd->cmd_queue, 0); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 876 | |
| 877 | /* make sure all queue are not stopped */ |
| 878 | memset(&priv->queue_stopped[0], 0, sizeof(priv->queue_stopped)); |
| 879 | for (i = 0; i < 4; i++) |
| 880 | atomic_set(&priv->queue_stop_count[i], 0); |
| 881 | for_each_context(priv, ctx) |
| 882 | ctx->last_tx_rejected = false; |
| 883 | |
| 884 | /* reset to 0 to enable all the queue first */ |
| 885 | priv->txq_ctx_active_msk = 0; |
| 886 | |
Emmanuel Grumbach | effcea1 | 2011-08-25 23:11:03 -0700 | [diff] [blame] | 887 | BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) < |
Johannes Berg | 72c04ce | 2011-07-23 10:24:40 -0700 | [diff] [blame] | 888 | IWLAGN_FIRST_AMPDU_QUEUE); |
Emmanuel Grumbach | effcea1 | 2011-08-25 23:11:03 -0700 | [diff] [blame] | 889 | BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) < |
Johannes Berg | 72c04ce | 2011-07-23 10:24:40 -0700 | [diff] [blame] | 890 | IWLAGN_FIRST_AMPDU_QUEUE); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 891 | |
Johannes Berg | 72c04ce | 2011-07-23 10:24:40 -0700 | [diff] [blame] | 892 | for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) { |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 893 | int fifo = queue_to_fifo[i].fifo; |
| 894 | int ac = queue_to_fifo[i].ac; |
| 895 | |
| 896 | iwl_txq_ctx_activate(priv, i); |
| 897 | |
| 898 | if (fifo == IWL_TX_FIFO_UNUSED) |
| 899 | continue; |
| 900 | |
| 901 | if (ac != IWL_AC_UNSET) |
| 902 | iwl_set_swq_id(&priv->txq[i], ac, i); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 903 | iwl_trans_tx_queue_set_status(priv, &priv->txq[i], fifo, 0); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 904 | } |
| 905 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 906 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
Emmanuel Grumbach | b3c2ce1 | 2011-07-07 15:50:10 +0300 | [diff] [blame] | 907 | |
| 908 | /* Enable L1-Active */ |
| 909 | iwl_clear_bits_prph(priv, APMG_PCIDEV_STT_REG, |
| 910 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
| 911 | } |
| 912 | |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 913 | /** |
| 914 | * iwlagn_txq_ctx_stop - Stop all Tx DMA channels |
| 915 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 916 | static int iwl_trans_tx_stop(struct iwl_trans *trans) |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 917 | { |
| 918 | int ch, txq_id; |
| 919 | unsigned long flags; |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 920 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 921 | |
| 922 | /* Turn off all Tx DMA fifos */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 923 | spin_lock_irqsave(&trans->shrd->lock, flags); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 924 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 925 | iwl_trans_txq_set_sched(trans, 0); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 926 | |
| 927 | /* Stop each Tx DMA channel, and wait for it to be idle */ |
Wey-Yi Guy | 02f6f65 | 2011-07-08 08:46:15 -0700 | [diff] [blame] | 928 | for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 929 | iwl_write_direct32(priv(trans), |
| 930 | FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); |
| 931 | if (iwl_poll_direct_bit(priv(trans), FH_TSSR_TX_STATUS_REG, |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 932 | FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), |
| 933 | 1000)) |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 934 | IWL_ERR(trans, "Failing on timeout while stopping" |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 935 | " DMA channel %d [0x%08x]", ch, |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 936 | iwl_read_direct32(priv(trans), |
| 937 | FH_TSSR_TX_STATUS_REG)); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 938 | } |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 939 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 940 | |
| 941 | if (!priv->txq) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 942 | IWL_WARN(trans, "Stopping tx queues that aren't allocated..."); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 943 | return 0; |
| 944 | } |
| 945 | |
| 946 | /* Unmap DMA from host system and free skb's */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 947 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) |
| 948 | iwl_tx_queue_unmap(trans, txq_id); |
Emmanuel Grumbach | c170b86 | 2011-07-08 08:46:12 -0700 | [diff] [blame] | 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 953 | static void iwl_trans_pcie_stop_device(struct iwl_trans *trans) |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 954 | { |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 955 | /* stop and reset the on-board processor */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 956 | iwl_write32(priv(trans), CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 957 | |
| 958 | /* tell the device to stop sending interrupts */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 959 | iwl_trans_disable_sync_irq(trans); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 960 | |
| 961 | /* device going down, Stop using ICT table */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 962 | iwl_disable_ict(trans); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 963 | |
| 964 | /* |
| 965 | * If a HW restart happens during firmware loading, |
| 966 | * then the firmware loading might call this function |
| 967 | * and later it might be called again due to the |
| 968 | * restart. So don't process again if the device is |
| 969 | * already dead. |
| 970 | */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 971 | if (test_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status)) { |
| 972 | iwl_trans_tx_stop(trans); |
| 973 | iwl_trans_rx_stop(trans); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 974 | |
| 975 | /* Power-down device's busmaster DMA clocks */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 976 | iwl_write_prph(priv(trans), APMG_CLK_DIS_REG, |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 977 | APMG_CLK_VAL_DMA_CLK_RQT); |
| 978 | udelay(5); |
| 979 | } |
| 980 | |
| 981 | /* Make sure (redundant) we've released our request to stay awake */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 982 | iwl_clear_bit(priv(trans), CSR_GP_CNTRL, |
| 983 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 984 | |
| 985 | /* Stop the device, and put it in low power state */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 986 | iwl_apm_stop(priv(trans)); |
Emmanuel Grumbach | ab6cf8e | 2011-07-07 14:37:26 +0300 | [diff] [blame] | 987 | } |
| 988 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 989 | static struct iwl_tx_cmd *iwl_trans_pcie_get_tx_cmd(struct iwl_trans *trans, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 990 | int txq_id) |
| 991 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 992 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 993 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; |
| 994 | struct iwl_queue *q = &txq->q; |
| 995 | struct iwl_device_cmd *dev_cmd; |
| 996 | |
| 997 | if (unlikely(iwl_queue_space(q) < q->high_mark)) |
| 998 | return NULL; |
| 999 | |
| 1000 | /* |
| 1001 | * Set up the Tx-command (not MAC!) header. |
| 1002 | * Store the chosen Tx queue and TFD index within the sequence field; |
| 1003 | * after Tx, uCode's Tx response will return this value so driver can |
| 1004 | * locate the frame within the tx queue and do post-tx processing. |
| 1005 | */ |
| 1006 | dev_cmd = txq->cmd[q->write_ptr]; |
| 1007 | memset(dev_cmd, 0, sizeof(*dev_cmd)); |
| 1008 | dev_cmd->hdr.cmd = REPLY_TX; |
| 1009 | dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | |
| 1010 | INDEX_TO_SEQ(q->write_ptr))); |
| 1011 | return &dev_cmd->cmd.tx; |
| 1012 | } |
| 1013 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1014 | static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1015 | struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu, |
| 1016 | struct iwl_rxon_context *ctx) |
| 1017 | { |
| 1018 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; |
| 1019 | struct iwl_queue *q = &txq->q; |
| 1020 | struct iwl_device_cmd *dev_cmd = txq->cmd[q->write_ptr]; |
| 1021 | struct iwl_cmd_meta *out_meta; |
| 1022 | |
| 1023 | dma_addr_t phys_addr = 0; |
| 1024 | dma_addr_t txcmd_phys; |
| 1025 | dma_addr_t scratch_phys; |
| 1026 | u16 len, firstlen, secondlen; |
| 1027 | u8 wait_write_ptr = 0; |
| 1028 | u8 hdr_len = ieee80211_hdrlen(fc); |
| 1029 | |
| 1030 | /* Set up driver data for this TFD */ |
| 1031 | memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); |
| 1032 | txq->txb[q->write_ptr].skb = skb; |
| 1033 | txq->txb[q->write_ptr].ctx = ctx; |
| 1034 | |
| 1035 | /* Set up first empty entry in queue's array of Tx/cmd buffers */ |
| 1036 | out_meta = &txq->meta[q->write_ptr]; |
| 1037 | |
| 1038 | /* |
| 1039 | * Use the first empty entry in this queue's command buffer array |
| 1040 | * to contain the Tx command and MAC header concatenated together |
| 1041 | * (payload data will be in another buffer). |
| 1042 | * Size of this varies, due to varying MAC header length. |
| 1043 | * If end is not dword aligned, we'll have 2 extra bytes at the end |
| 1044 | * of the MAC header (device reads on dword boundaries). |
| 1045 | * We'll tell device about this padding later. |
| 1046 | */ |
| 1047 | len = sizeof(struct iwl_tx_cmd) + |
| 1048 | sizeof(struct iwl_cmd_header) + hdr_len; |
| 1049 | firstlen = (len + 3) & ~3; |
| 1050 | |
| 1051 | /* Tell NIC about any 2-byte padding after MAC header */ |
| 1052 | if (firstlen != len) |
| 1053 | tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; |
| 1054 | |
| 1055 | /* Physical address of this Tx command's header (not MAC header!), |
| 1056 | * within command buffer array. */ |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1057 | txcmd_phys = dma_map_single(priv->bus->dev, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1058 | &dev_cmd->hdr, firstlen, |
| 1059 | DMA_BIDIRECTIONAL); |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1060 | if (unlikely(dma_mapping_error(priv->bus->dev, txcmd_phys))) |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1061 | return -1; |
| 1062 | dma_unmap_addr_set(out_meta, mapping, txcmd_phys); |
| 1063 | dma_unmap_len_set(out_meta, len, firstlen); |
| 1064 | |
| 1065 | if (!ieee80211_has_morefrags(fc)) { |
| 1066 | txq->need_update = 1; |
| 1067 | } else { |
| 1068 | wait_write_ptr = 1; |
| 1069 | txq->need_update = 0; |
| 1070 | } |
| 1071 | |
| 1072 | /* Set up TFD's 2nd entry to point directly to remainder of skb, |
| 1073 | * if any (802.11 null frames have no payload). */ |
| 1074 | secondlen = skb->len - hdr_len; |
| 1075 | if (secondlen > 0) { |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1076 | phys_addr = dma_map_single(priv->bus->dev, skb->data + hdr_len, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1077 | secondlen, DMA_TO_DEVICE); |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1078 | if (unlikely(dma_mapping_error(priv->bus->dev, phys_addr))) { |
| 1079 | dma_unmap_single(priv->bus->dev, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1080 | dma_unmap_addr(out_meta, mapping), |
| 1081 | dma_unmap_len(out_meta, len), |
| 1082 | DMA_BIDIRECTIONAL); |
| 1083 | return -1; |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | /* Attach buffers to TFD */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1088 | iwlagn_txq_attach_buf_to_tfd(trans(priv), txq, txcmd_phys, |
| 1089 | firstlen, 1); |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1090 | if (secondlen > 0) |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1091 | iwlagn_txq_attach_buf_to_tfd(trans(priv), txq, phys_addr, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1092 | secondlen, 0); |
| 1093 | |
| 1094 | scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + |
| 1095 | offsetof(struct iwl_tx_cmd, scratch); |
| 1096 | |
| 1097 | /* take back ownership of DMA buffer to enable update */ |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1098 | dma_sync_single_for_cpu(priv->bus->dev, txcmd_phys, firstlen, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1099 | DMA_BIDIRECTIONAL); |
| 1100 | tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); |
| 1101 | tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); |
| 1102 | |
| 1103 | IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n", |
| 1104 | le16_to_cpu(dev_cmd->hdr.sequence)); |
| 1105 | IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); |
| 1106 | iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); |
| 1107 | iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); |
| 1108 | |
| 1109 | /* Set up entry for this TFD in Tx byte-count array */ |
| 1110 | if (ampdu) |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1111 | iwl_trans_txq_update_byte_cnt_tbl(trans(priv), txq, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1112 | le16_to_cpu(tx_cmd->len)); |
| 1113 | |
Emmanuel Grumbach | d593411 | 2011-07-11 10:48:51 +0300 | [diff] [blame] | 1114 | dma_sync_single_for_device(priv->bus->dev, txcmd_phys, firstlen, |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1115 | DMA_BIDIRECTIONAL); |
| 1116 | |
| 1117 | trace_iwlwifi_dev_tx(priv, |
| 1118 | &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr], |
| 1119 | sizeof(struct iwl_tfd), |
| 1120 | &dev_cmd->hdr, firstlen, |
| 1121 | skb->data + hdr_len, secondlen); |
| 1122 | |
| 1123 | /* Tell device the write index *just past* this latest filled TFD */ |
| 1124 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); |
| 1125 | iwl_txq_update_write_ptr(priv, txq); |
| 1126 | |
| 1127 | /* |
| 1128 | * At this point the frame is "transmitted" successfully |
| 1129 | * and we will get a TX status notification eventually, |
| 1130 | * regardless of the value of ret. "ret" only indicates |
| 1131 | * whether or not we should update the write pointer. |
| 1132 | */ |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1133 | if (iwl_queue_space(q) < q->high_mark) { |
Emmanuel Grumbach | 47c1b49 | 2011-07-03 11:22:15 +0300 | [diff] [blame] | 1134 | if (wait_write_ptr) { |
| 1135 | txq->need_update = 1; |
| 1136 | iwl_txq_update_write_ptr(priv, txq); |
| 1137 | } else { |
| 1138 | iwl_stop_queue(priv, txq); |
| 1139 | } |
| 1140 | } |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1144 | static void iwl_trans_pcie_kick_nic(struct iwl_trans *trans) |
Emmanuel Grumbach | 56d90f4 | 2011-07-07 18:20:01 +0300 | [diff] [blame] | 1145 | { |
| 1146 | /* Remove all resets to allow NIC to operate */ |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1147 | iwl_write32(priv(trans), CSR_RESET, 0); |
Emmanuel Grumbach | 56d90f4 | 2011-07-07 18:20:01 +0300 | [diff] [blame] | 1148 | } |
| 1149 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1150 | static int iwl_trans_pcie_request_irq(struct iwl_trans *trans) |
Emmanuel Grumbach | a27367d | 2011-07-04 09:06:44 +0300 | [diff] [blame] | 1151 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1152 | struct iwl_trans_pcie *trans_pcie = |
| 1153 | IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 34c1b7b | 2011-07-04 08:58:19 +0300 | [diff] [blame] | 1154 | int err; |
| 1155 | |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1156 | trans_pcie->inta_mask = CSR_INI_SET_MASK; |
Emmanuel Grumbach | 1e89cbac | 2011-07-20 17:51:22 -0700 | [diff] [blame] | 1157 | |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1158 | tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long)) |
| 1159 | iwl_irq_tasklet, (unsigned long)trans); |
| 1160 | |
| 1161 | iwl_alloc_isr_ict(trans); |
Emmanuel Grumbach | 34c1b7b | 2011-07-04 08:58:19 +0300 | [diff] [blame] | 1162 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1163 | err = request_irq(bus(trans)->irq, iwl_isr_ict, IRQF_SHARED, |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1164 | DRV_NAME, trans); |
Emmanuel Grumbach | 34c1b7b | 2011-07-04 08:58:19 +0300 | [diff] [blame] | 1165 | if (err) { |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1166 | IWL_ERR(trans, "Error allocating IRQ %d\n", bus(trans)->irq); |
| 1167 | iwl_free_isr_ict(trans); |
Emmanuel Grumbach | 34c1b7b | 2011-07-04 08:58:19 +0300 | [diff] [blame] | 1168 | return err; |
| 1169 | } |
| 1170 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1171 | INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish); |
Emmanuel Grumbach | 34c1b7b | 2011-07-04 08:58:19 +0300 | [diff] [blame] | 1172 | return 0; |
Emmanuel Grumbach | c85eb61 | 2011-06-14 10:13:24 +0300 | [diff] [blame] | 1173 | } |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1174 | |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1175 | static void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, |
| 1176 | int ssn, u32 status, struct sk_buff_head *skbs) |
| 1177 | { |
| 1178 | struct iwl_priv *priv = priv(trans); |
| 1179 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; |
| 1180 | /* n_bd is usually 256 => n_bd - 1 = 0xff */ |
| 1181 | int tfd_num = ssn & (txq->q.n_bd - 1); |
| 1182 | u8 agg_state; |
| 1183 | bool cond; |
| 1184 | |
| 1185 | if (txq->sched_retry) { |
| 1186 | agg_state = |
| 1187 | priv->stations[txq->sta_id].tid[txq->tid].agg.state; |
| 1188 | cond = (agg_state != IWL_EMPTYING_HW_QUEUE_DELBA); |
| 1189 | } else { |
| 1190 | cond = (status != TX_STATUS_FAIL_PASSIVE_NO_RX); |
| 1191 | } |
| 1192 | |
| 1193 | if (txq->q.read_ptr != tfd_num) { |
| 1194 | IWL_DEBUG_TX_REPLY(trans, "Retry scheduler reclaim " |
| 1195 | "scd_ssn=%d idx=%d txq=%d swq=%d\n", |
| 1196 | ssn , tfd_num, txq_id, txq->swq_id); |
| 1197 | iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs); |
| 1198 | if (iwl_queue_space(&txq->q) > txq->q.low_mark && cond) |
| 1199 | iwl_wake_queue(priv, txq); |
| 1200 | } |
| 1201 | } |
| 1202 | |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1203 | static void iwl_trans_pcie_disable_sync_irq(struct iwl_trans *trans) |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1204 | { |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1205 | unsigned long flags; |
| 1206 | struct iwl_trans_pcie *trans_pcie = |
| 1207 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1208 | |
| 1209 | spin_lock_irqsave(&trans->shrd->lock, flags); |
| 1210 | iwl_disable_interrupts(trans); |
| 1211 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
| 1212 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1213 | /* wait to make sure we flush pending tasklet*/ |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1214 | synchronize_irq(bus(trans)->irq); |
| 1215 | tasklet_kill(&trans_pcie->irq_tasklet); |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1216 | } |
| 1217 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1218 | static void iwl_trans_pcie_free(struct iwl_trans *trans) |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1219 | { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1220 | free_irq(bus(trans)->irq, trans); |
| 1221 | iwl_free_isr_ict(trans); |
| 1222 | trans->shrd->trans = NULL; |
| 1223 | kfree(trans); |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1224 | } |
| 1225 | |
Emmanuel Grumbach | 57210f7 | 2011-08-25 23:10:52 -0700 | [diff] [blame] | 1226 | #ifdef CONFIG_PM |
| 1227 | |
| 1228 | static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
| 1229 | { |
| 1230 | /* |
| 1231 | * This function is called when system goes into suspend state |
| 1232 | * mac80211 will call iwl_mac_stop() from the mac80211 suspend function |
| 1233 | * first but since iwl_mac_stop() has no knowledge of who the caller is, |
| 1234 | * it will not call apm_ops.stop() to stop the DMA operation. |
| 1235 | * Calling apm_ops.stop here to make sure we stop the DMA. |
| 1236 | * |
| 1237 | * But of course ... if we have configured WoWLAN then we did other |
| 1238 | * things already :-) |
| 1239 | */ |
| 1240 | if (!trans->shrd->wowlan) |
| 1241 | iwl_apm_stop(priv(trans)); |
| 1242 | |
| 1243 | return 0; |
| 1244 | } |
| 1245 | |
| 1246 | static int iwl_trans_pcie_resume(struct iwl_trans *trans) |
| 1247 | { |
| 1248 | bool hw_rfkill = false; |
| 1249 | |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1250 | iwl_enable_interrupts(trans); |
Emmanuel Grumbach | 57210f7 | 2011-08-25 23:10:52 -0700 | [diff] [blame] | 1251 | |
| 1252 | if (!(iwl_read32(priv(trans), CSR_GP_CNTRL) & |
| 1253 | CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) |
| 1254 | hw_rfkill = true; |
| 1255 | |
| 1256 | if (hw_rfkill) |
| 1257 | set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
| 1258 | else |
| 1259 | clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
| 1260 | |
| 1261 | wiphy_rfkill_set_hw_state(priv(trans)->hw->wiphy, hw_rfkill); |
| 1262 | |
| 1263 | return 0; |
| 1264 | } |
| 1265 | #else /* CONFIG_PM */ |
| 1266 | static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
| 1267 | { return 0; } |
| 1268 | |
| 1269 | static int iwl_trans_pcie_resume(struct iwl_trans *trans) |
| 1270 | { return 0; } |
| 1271 | |
| 1272 | #endif /* CONFIG_PM */ |
| 1273 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1274 | const struct iwl_trans_ops trans_ops_pcie; |
| 1275 | |
| 1276 | static struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd) |
| 1277 | { |
| 1278 | struct iwl_trans *iwl_trans = kzalloc(sizeof(struct iwl_trans) + |
| 1279 | sizeof(struct iwl_trans_pcie), |
| 1280 | GFP_KERNEL); |
| 1281 | if (iwl_trans) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1282 | struct iwl_trans_pcie *trans_pcie = |
| 1283 | IWL_TRANS_GET_PCIE_TRANS(iwl_trans); |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1284 | iwl_trans->ops = &trans_ops_pcie; |
| 1285 | iwl_trans->shrd = shrd; |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1286 | trans_pcie->trans = iwl_trans; |
Emmanuel Grumbach | 7201247 | 2011-08-25 23:11:07 -0700 | [diff] [blame^] | 1287 | spin_lock_init(&iwl_trans->hcmd_lock); |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1288 | } |
| 1289 | |
| 1290 | return iwl_trans; |
| 1291 | } |
| 1292 | |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1293 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
| 1294 | /* create and remove of files */ |
| 1295 | #define DEBUGFS_ADD_FILE(name, parent, mode) do { \ |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1296 | if (!debugfs_create_file(#name, mode, parent, trans, \ |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1297 | &iwl_dbgfs_##name##_ops)) \ |
| 1298 | return -ENOMEM; \ |
| 1299 | } while (0) |
| 1300 | |
| 1301 | /* file operation */ |
| 1302 | #define DEBUGFS_READ_FUNC(name) \ |
| 1303 | static ssize_t iwl_dbgfs_##name##_read(struct file *file, \ |
| 1304 | char __user *user_buf, \ |
| 1305 | size_t count, loff_t *ppos); |
| 1306 | |
| 1307 | #define DEBUGFS_WRITE_FUNC(name) \ |
| 1308 | static ssize_t iwl_dbgfs_##name##_write(struct file *file, \ |
| 1309 | const char __user *user_buf, \ |
| 1310 | size_t count, loff_t *ppos); |
| 1311 | |
| 1312 | |
| 1313 | static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file) |
| 1314 | { |
| 1315 | file->private_data = inode->i_private; |
| 1316 | return 0; |
| 1317 | } |
| 1318 | |
| 1319 | #define DEBUGFS_READ_FILE_OPS(name) \ |
| 1320 | DEBUGFS_READ_FUNC(name); \ |
| 1321 | static const struct file_operations iwl_dbgfs_##name##_ops = { \ |
| 1322 | .read = iwl_dbgfs_##name##_read, \ |
| 1323 | .open = iwl_dbgfs_open_file_generic, \ |
| 1324 | .llseek = generic_file_llseek, \ |
| 1325 | }; |
| 1326 | |
| 1327 | #define DEBUGFS_READ_WRITE_FILE_OPS(name) \ |
| 1328 | DEBUGFS_READ_FUNC(name); \ |
| 1329 | DEBUGFS_WRITE_FUNC(name); \ |
| 1330 | static const struct file_operations iwl_dbgfs_##name##_ops = { \ |
| 1331 | .write = iwl_dbgfs_##name##_write, \ |
| 1332 | .read = iwl_dbgfs_##name##_read, \ |
| 1333 | .open = iwl_dbgfs_open_file_generic, \ |
| 1334 | .llseek = generic_file_llseek, \ |
| 1335 | }; |
| 1336 | |
| 1337 | static ssize_t iwl_dbgfs_traffic_log_read(struct file *file, |
| 1338 | char __user *user_buf, |
| 1339 | size_t count, loff_t *ppos) |
| 1340 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1341 | struct iwl_trans *trans = file->private_data; |
| 1342 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1343 | int pos = 0, ofs = 0; |
| 1344 | int cnt = 0, entry; |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1345 | struct iwl_trans_pcie *trans_pcie = |
| 1346 | IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1347 | struct iwl_tx_queue *txq; |
| 1348 | struct iwl_queue *q; |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1349 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1350 | char *buf; |
| 1351 | int bufsz = ((IWL_TRAFFIC_ENTRIES * IWL_TRAFFIC_ENTRY_SIZE * 64) * 2) + |
| 1352 | (priv->cfg->base_params->num_of_queues * 32 * 8) + 400; |
| 1353 | const u8 *ptr; |
| 1354 | ssize_t ret; |
| 1355 | |
| 1356 | if (!priv->txq) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1357 | IWL_ERR(trans, "txq not ready\n"); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1358 | return -EAGAIN; |
| 1359 | } |
| 1360 | buf = kzalloc(bufsz, GFP_KERNEL); |
| 1361 | if (!buf) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1362 | IWL_ERR(trans, "Can not allocate buffer\n"); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1363 | return -ENOMEM; |
| 1364 | } |
| 1365 | pos += scnprintf(buf + pos, bufsz - pos, "Tx Queue\n"); |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1366 | for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1367 | txq = &priv->txq[cnt]; |
| 1368 | q = &txq->q; |
| 1369 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1370 | "q[%d]: read_ptr: %u, write_ptr: %u\n", |
| 1371 | cnt, q->read_ptr, q->write_ptr); |
| 1372 | } |
| 1373 | if (priv->tx_traffic && |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1374 | (iwl_get_debug_level(trans->shrd) & IWL_DL_TX)) { |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1375 | ptr = priv->tx_traffic; |
| 1376 | pos += scnprintf(buf + pos, bufsz - pos, |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1377 | "Tx Traffic idx: %u\n", priv->tx_traffic_idx); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1378 | for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) { |
| 1379 | for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16; |
| 1380 | entry++, ofs += 16) { |
| 1381 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1382 | "0x%.4x ", ofs); |
| 1383 | hex_dump_to_buffer(ptr + ofs, 16, 16, 2, |
| 1384 | buf + pos, bufsz - pos, 0); |
| 1385 | pos += strlen(buf + pos); |
| 1386 | if (bufsz - pos > 0) |
| 1387 | buf[pos++] = '\n'; |
| 1388 | } |
| 1389 | } |
| 1390 | } |
| 1391 | |
| 1392 | pos += scnprintf(buf + pos, bufsz - pos, "Rx Queue\n"); |
| 1393 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1394 | "read: %u, write: %u\n", |
| 1395 | rxq->read, rxq->write); |
| 1396 | |
| 1397 | if (priv->rx_traffic && |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1398 | (iwl_get_debug_level(trans->shrd) & IWL_DL_RX)) { |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1399 | ptr = priv->rx_traffic; |
| 1400 | pos += scnprintf(buf + pos, bufsz - pos, |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1401 | "Rx Traffic idx: %u\n", priv->rx_traffic_idx); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1402 | for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) { |
| 1403 | for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16; |
| 1404 | entry++, ofs += 16) { |
| 1405 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1406 | "0x%.4x ", ofs); |
| 1407 | hex_dump_to_buffer(ptr + ofs, 16, 16, 2, |
| 1408 | buf + pos, bufsz - pos, 0); |
| 1409 | pos += strlen(buf + pos); |
| 1410 | if (bufsz - pos > 0) |
| 1411 | buf[pos++] = '\n'; |
| 1412 | } |
| 1413 | } |
| 1414 | } |
| 1415 | |
| 1416 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
| 1417 | kfree(buf); |
| 1418 | return ret; |
| 1419 | } |
| 1420 | |
| 1421 | static ssize_t iwl_dbgfs_traffic_log_write(struct file *file, |
| 1422 | const char __user *user_buf, |
| 1423 | size_t count, loff_t *ppos) |
| 1424 | { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1425 | struct iwl_trans *trans = file->private_data; |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1426 | char buf[8]; |
| 1427 | int buf_size; |
| 1428 | int traffic_log; |
| 1429 | |
| 1430 | memset(buf, 0, sizeof(buf)); |
| 1431 | buf_size = min(count, sizeof(buf) - 1); |
| 1432 | if (copy_from_user(buf, user_buf, buf_size)) |
| 1433 | return -EFAULT; |
| 1434 | if (sscanf(buf, "%d", &traffic_log) != 1) |
| 1435 | return -EFAULT; |
| 1436 | if (traffic_log == 0) |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1437 | iwl_reset_traffic_log(priv(trans)); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1438 | |
| 1439 | return count; |
| 1440 | } |
| 1441 | |
| 1442 | static ssize_t iwl_dbgfs_tx_queue_read(struct file *file, |
| 1443 | char __user *user_buf, |
| 1444 | size_t count, loff_t *ppos) { |
| 1445 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1446 | struct iwl_trans *trans = file->private_data; |
| 1447 | struct iwl_priv *priv = priv(trans); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1448 | struct iwl_tx_queue *txq; |
| 1449 | struct iwl_queue *q; |
| 1450 | char *buf; |
| 1451 | int pos = 0; |
| 1452 | int cnt; |
| 1453 | int ret; |
| 1454 | const size_t bufsz = sizeof(char) * 64 * |
| 1455 | priv->cfg->base_params->num_of_queues; |
| 1456 | |
| 1457 | if (!priv->txq) { |
| 1458 | IWL_ERR(priv, "txq not ready\n"); |
| 1459 | return -EAGAIN; |
| 1460 | } |
| 1461 | buf = kzalloc(bufsz, GFP_KERNEL); |
| 1462 | if (!buf) |
| 1463 | return -ENOMEM; |
| 1464 | |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1465 | for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1466 | txq = &priv->txq[cnt]; |
| 1467 | q = &txq->q; |
| 1468 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1469 | "hwq %.2d: read=%u write=%u stop=%d" |
| 1470 | " swq_id=%#.2x (ac %d/hwq %d)\n", |
| 1471 | cnt, q->read_ptr, q->write_ptr, |
| 1472 | !!test_bit(cnt, priv->queue_stopped), |
| 1473 | txq->swq_id, txq->swq_id & 3, |
| 1474 | (txq->swq_id >> 2) & 0x1f); |
| 1475 | if (cnt >= 4) |
| 1476 | continue; |
| 1477 | /* for the ACs, display the stop count too */ |
| 1478 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1479 | " stop-count: %d\n", |
| 1480 | atomic_read(&priv->queue_stop_count[cnt])); |
| 1481 | } |
| 1482 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
| 1483 | kfree(buf); |
| 1484 | return ret; |
| 1485 | } |
| 1486 | |
| 1487 | static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, |
| 1488 | char __user *user_buf, |
| 1489 | size_t count, loff_t *ppos) { |
Emmanuel Grumbach | 5a878bf | 2011-08-25 23:10:51 -0700 | [diff] [blame] | 1490 | struct iwl_trans *trans = file->private_data; |
| 1491 | struct iwl_trans_pcie *trans_pcie = |
| 1492 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1493 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1494 | char buf[256]; |
| 1495 | int pos = 0; |
| 1496 | const size_t bufsz = sizeof(buf); |
| 1497 | |
| 1498 | pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n", |
| 1499 | rxq->read); |
| 1500 | pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n", |
| 1501 | rxq->write); |
| 1502 | pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n", |
| 1503 | rxq->free_count); |
| 1504 | if (rxq->rb_stts) { |
| 1505 | pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", |
| 1506 | le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF); |
| 1507 | } else { |
| 1508 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1509 | "closed_rb_num: Not Allocated\n"); |
| 1510 | } |
| 1511 | return simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
| 1512 | } |
| 1513 | |
Emmanuel Grumbach | 7ff9470 | 2011-08-25 23:10:54 -0700 | [diff] [blame] | 1514 | static ssize_t iwl_dbgfs_log_event_read(struct file *file, |
| 1515 | char __user *user_buf, |
| 1516 | size_t count, loff_t *ppos) |
| 1517 | { |
| 1518 | struct iwl_trans *trans = file->private_data; |
| 1519 | char *buf; |
| 1520 | int pos = 0; |
| 1521 | ssize_t ret = -ENOMEM; |
| 1522 | |
| 1523 | ret = pos = iwl_dump_nic_event_log(priv(trans), true, &buf, true); |
| 1524 | if (buf) { |
| 1525 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
| 1526 | kfree(buf); |
| 1527 | } |
| 1528 | return ret; |
| 1529 | } |
| 1530 | |
| 1531 | static ssize_t iwl_dbgfs_log_event_write(struct file *file, |
| 1532 | const char __user *user_buf, |
| 1533 | size_t count, loff_t *ppos) |
| 1534 | { |
| 1535 | struct iwl_trans *trans = file->private_data; |
| 1536 | u32 event_log_flag; |
| 1537 | char buf[8]; |
| 1538 | int buf_size; |
| 1539 | |
| 1540 | memset(buf, 0, sizeof(buf)); |
| 1541 | buf_size = min(count, sizeof(buf) - 1); |
| 1542 | if (copy_from_user(buf, user_buf, buf_size)) |
| 1543 | return -EFAULT; |
| 1544 | if (sscanf(buf, "%d", &event_log_flag) != 1) |
| 1545 | return -EFAULT; |
| 1546 | if (event_log_flag == 1) |
| 1547 | iwl_dump_nic_event_log(priv(trans), true, NULL, false); |
| 1548 | |
| 1549 | return count; |
| 1550 | } |
| 1551 | |
Emmanuel Grumbach | 1f7b617 | 2011-08-25 23:10:59 -0700 | [diff] [blame] | 1552 | static ssize_t iwl_dbgfs_interrupt_read(struct file *file, |
| 1553 | char __user *user_buf, |
| 1554 | size_t count, loff_t *ppos) { |
| 1555 | |
| 1556 | struct iwl_trans *trans = file->private_data; |
| 1557 | struct iwl_trans_pcie *trans_pcie = |
| 1558 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1559 | struct isr_statistics *isr_stats = &trans_pcie->isr_stats; |
| 1560 | |
| 1561 | int pos = 0; |
| 1562 | char *buf; |
| 1563 | int bufsz = 24 * 64; /* 24 items * 64 char per item */ |
| 1564 | ssize_t ret; |
| 1565 | |
| 1566 | buf = kzalloc(bufsz, GFP_KERNEL); |
| 1567 | if (!buf) { |
| 1568 | IWL_ERR(trans, "Can not allocate Buffer\n"); |
| 1569 | return -ENOMEM; |
| 1570 | } |
| 1571 | |
| 1572 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1573 | "Interrupt Statistics Report:\n"); |
| 1574 | |
| 1575 | pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", |
| 1576 | isr_stats->hw); |
| 1577 | pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", |
| 1578 | isr_stats->sw); |
| 1579 | if (isr_stats->sw || isr_stats->hw) { |
| 1580 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1581 | "\tLast Restarting Code: 0x%X\n", |
| 1582 | isr_stats->err_code); |
| 1583 | } |
| 1584 | #ifdef CONFIG_IWLWIFI_DEBUG |
| 1585 | pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", |
| 1586 | isr_stats->sch); |
| 1587 | pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", |
| 1588 | isr_stats->alive); |
| 1589 | #endif |
| 1590 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1591 | "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill); |
| 1592 | |
| 1593 | pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", |
| 1594 | isr_stats->ctkill); |
| 1595 | |
| 1596 | pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", |
| 1597 | isr_stats->wakeup); |
| 1598 | |
| 1599 | pos += scnprintf(buf + pos, bufsz - pos, |
| 1600 | "Rx command responses:\t\t %u\n", isr_stats->rx); |
| 1601 | |
| 1602 | pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", |
| 1603 | isr_stats->tx); |
| 1604 | |
| 1605 | pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", |
| 1606 | isr_stats->unhandled); |
| 1607 | |
| 1608 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); |
| 1609 | kfree(buf); |
| 1610 | return ret; |
| 1611 | } |
| 1612 | |
| 1613 | static ssize_t iwl_dbgfs_interrupt_write(struct file *file, |
| 1614 | const char __user *user_buf, |
| 1615 | size_t count, loff_t *ppos) |
| 1616 | { |
| 1617 | struct iwl_trans *trans = file->private_data; |
| 1618 | struct iwl_trans_pcie *trans_pcie = |
| 1619 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1620 | struct isr_statistics *isr_stats = &trans_pcie->isr_stats; |
| 1621 | |
| 1622 | char buf[8]; |
| 1623 | int buf_size; |
| 1624 | u32 reset_flag; |
| 1625 | |
| 1626 | memset(buf, 0, sizeof(buf)); |
| 1627 | buf_size = min(count, sizeof(buf) - 1); |
| 1628 | if (copy_from_user(buf, user_buf, buf_size)) |
| 1629 | return -EFAULT; |
| 1630 | if (sscanf(buf, "%x", &reset_flag) != 1) |
| 1631 | return -EFAULT; |
| 1632 | if (reset_flag == 0) |
| 1633 | memset(isr_stats, 0, sizeof(*isr_stats)); |
| 1634 | |
| 1635 | return count; |
| 1636 | } |
| 1637 | |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1638 | DEBUGFS_READ_WRITE_FILE_OPS(traffic_log); |
Emmanuel Grumbach | 7ff9470 | 2011-08-25 23:10:54 -0700 | [diff] [blame] | 1639 | DEBUGFS_READ_WRITE_FILE_OPS(log_event); |
Emmanuel Grumbach | 1f7b617 | 2011-08-25 23:10:59 -0700 | [diff] [blame] | 1640 | DEBUGFS_READ_WRITE_FILE_OPS(interrupt); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1641 | DEBUGFS_READ_FILE_OPS(rx_queue); |
| 1642 | DEBUGFS_READ_FILE_OPS(tx_queue); |
| 1643 | |
| 1644 | /* |
| 1645 | * Create the debugfs files and directories |
| 1646 | * |
| 1647 | */ |
| 1648 | static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, |
| 1649 | struct dentry *dir) |
| 1650 | { |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1651 | DEBUGFS_ADD_FILE(traffic_log, dir, S_IWUSR | S_IRUSR); |
| 1652 | DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR); |
| 1653 | DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR); |
Emmanuel Grumbach | 7ff9470 | 2011-08-25 23:10:54 -0700 | [diff] [blame] | 1654 | DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR); |
Emmanuel Grumbach | 1f7b617 | 2011-08-25 23:10:59 -0700 | [diff] [blame] | 1655 | DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR); |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1656 | return 0; |
| 1657 | } |
| 1658 | #else |
| 1659 | static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, |
| 1660 | struct dentry *dir) |
| 1661 | { return 0; } |
| 1662 | |
| 1663 | #endif /*CONFIG_IWLWIFI_DEBUGFS */ |
| 1664 | |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1665 | const struct iwl_trans_ops trans_ops_pcie = { |
| 1666 | .alloc = iwl_trans_pcie_alloc, |
| 1667 | .request_irq = iwl_trans_pcie_request_irq, |
| 1668 | .start_device = iwl_trans_pcie_start_device, |
| 1669 | .prepare_card_hw = iwl_trans_pcie_prepare_card_hw, |
| 1670 | .stop_device = iwl_trans_pcie_stop_device, |
| 1671 | |
| 1672 | .tx_start = iwl_trans_pcie_tx_start, |
| 1673 | |
| 1674 | .rx_free = iwl_trans_pcie_rx_free, |
| 1675 | .tx_free = iwl_trans_pcie_tx_free, |
| 1676 | |
| 1677 | .send_cmd = iwl_trans_pcie_send_cmd, |
| 1678 | .send_cmd_pdu = iwl_trans_pcie_send_cmd_pdu, |
| 1679 | |
| 1680 | .get_tx_cmd = iwl_trans_pcie_get_tx_cmd, |
| 1681 | .tx = iwl_trans_pcie_tx, |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1682 | .reclaim = iwl_trans_pcie_reclaim, |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1683 | |
| 1684 | .txq_agg_disable = iwl_trans_pcie_txq_agg_disable, |
| 1685 | .txq_agg_setup = iwl_trans_pcie_txq_agg_setup, |
| 1686 | |
| 1687 | .kick_nic = iwl_trans_pcie_kick_nic, |
| 1688 | |
Emmanuel Grumbach | 0c32576 | 2011-08-25 23:10:53 -0700 | [diff] [blame] | 1689 | .disable_sync_irq = iwl_trans_pcie_disable_sync_irq, |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1690 | .free = iwl_trans_pcie_free, |
Emmanuel Grumbach | 87e5666 | 2011-08-25 23:10:50 -0700 | [diff] [blame] | 1691 | |
| 1692 | .dbgfs_register = iwl_trans_pcie_dbgfs_register, |
Emmanuel Grumbach | 57210f7 | 2011-08-25 23:10:52 -0700 | [diff] [blame] | 1693 | .suspend = iwl_trans_pcie_suspend, |
| 1694 | .resume = iwl_trans_pcie_resume, |
Emmanuel Grumbach | e6bb4c9 | 2011-08-25 23:10:48 -0700 | [diff] [blame] | 1695 | }; |
| 1696 | |