Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
Emmanuel Grumbach | 51368bf | 2013-12-30 13:15:54 +0200 | [diff] [blame] | 3 | * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. |
Luciano Coelho | 4cbb8e50 | 2015-08-18 16:02:38 +0300 | [diff] [blame] | 4 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
| 5 | * Copyright(c) 2016 Intel Deutschland GmbH |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 6 | * |
| 7 | * Portions of this file are derived from the ipw3945 project, as well |
| 8 | * as portions of the ieee80211 subsystem header files. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * 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 WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along with |
| 20 | * this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 22 | * |
| 23 | * The full GNU General Public License is included in this distribution in the |
| 24 | * file called LICENSE. |
| 25 | * |
| 26 | * Contact Information: |
Emmanuel Grumbach | cb2f827 | 2015-11-17 15:39:56 +0200 | [diff] [blame] | 27 | * Intel Linux Wireless <linuxwifi@intel.com> |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 28 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 29 | * |
| 30 | *****************************************************************************/ |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 31 | #include <linux/etherdevice.h> |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 32 | #include <linux/ieee80211.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 34 | #include <linux/sched.h> |
Luca Coelho | 71b1230 | 2016-03-11 12:12:16 +0200 | [diff] [blame] | 35 | #include <linux/pm_runtime.h> |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 36 | #include <net/ip6_checksum.h> |
| 37 | #include <net/tso.h> |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 38 | |
Emmanuel Grumbach | 522376d | 2011-09-06 09:31:19 -0700 | [diff] [blame] | 39 | #include "iwl-debug.h" |
| 40 | #include "iwl-csr.h" |
| 41 | #include "iwl-prph.h" |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 42 | #include "iwl-io.h" |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 43 | #include "iwl-scd.h" |
Emmanuel Grumbach | ed277c9 | 2012-02-09 16:08:15 +0200 | [diff] [blame] | 44 | #include "iwl-op-mode.h" |
Johannes Berg | 6468a01 | 2012-05-16 19:13:54 +0200 | [diff] [blame] | 45 | #include "internal.h" |
Johannes Berg | 6238b00 | 2012-04-02 15:04:33 +0200 | [diff] [blame] | 46 | /* FIXME: need to abstract out TX command (once we know what it looks like) */ |
Johannes Berg | 1023fdc | 2012-05-15 12:16:34 +0200 | [diff] [blame] | 47 | #include "dvm/commands.h" |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 48 | |
Emmanuel Grumbach | 522376d | 2011-09-06 09:31:19 -0700 | [diff] [blame] | 49 | #define IWL_TX_CRC_SIZE 4 |
| 50 | #define IWL_TX_DELIMITER_SIZE 4 |
| 51 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 52 | /*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** |
| 53 | * DMA services |
| 54 | * |
| 55 | * Theory of operation |
| 56 | * |
| 57 | * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer |
| 58 | * of buffer descriptors, each of which points to one or more data buffers for |
| 59 | * the device to read from or fill. Driver and device exchange status of each |
| 60 | * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty |
| 61 | * entries in each circular buffer, to protect against confusing empty and full |
| 62 | * queue states. |
| 63 | * |
| 64 | * The device reads or writes the data in the queues via the device's several |
| 65 | * DMA/FIFO channels. Each queue is mapped to a single DMA channel. |
| 66 | * |
| 67 | * For Tx queue, there are low mark and high mark limits. If, after queuing |
| 68 | * the packet for Tx, free space become < low mark, Tx queue stopped. When |
| 69 | * reclaiming packets (on 'tx done IRQ), if free space become > high mark, |
| 70 | * Tx queue resumed. |
| 71 | * |
| 72 | ***************************************************/ |
Sara Sharon | e22744a | 2016-06-22 17:23:34 +0300 | [diff] [blame] | 73 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 74 | static int iwl_queue_space(const struct iwl_queue *q) |
| 75 | { |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 76 | unsigned int max; |
| 77 | unsigned int used; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 78 | |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 79 | /* |
| 80 | * To avoid ambiguity between empty and completely full queues, there |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 81 | * should always be less than TFD_QUEUE_SIZE_MAX elements in the queue. |
| 82 | * If q->n_window is smaller than TFD_QUEUE_SIZE_MAX, there is no need |
| 83 | * to reserve any queue entries for this purpose. |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 84 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 85 | if (q->n_window < TFD_QUEUE_SIZE_MAX) |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 86 | max = q->n_window; |
| 87 | else |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 88 | max = TFD_QUEUE_SIZE_MAX - 1; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 89 | |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 90 | /* |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 91 | * TFD_QUEUE_SIZE_MAX is a power of 2, so the following is equivalent to |
| 92 | * modulo by TFD_QUEUE_SIZE_MAX and is well defined. |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 93 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 94 | used = (q->write_ptr - q->read_ptr) & (TFD_QUEUE_SIZE_MAX - 1); |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 95 | |
| 96 | if (WARN_ON(used > max)) |
| 97 | return 0; |
| 98 | |
| 99 | return max - used; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | /* |
| 103 | * iwl_queue_init - Initialize queue's high/low-water and read/write indexes |
| 104 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 105 | static int iwl_queue_init(struct iwl_queue *q, int slots_num, u32 id) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 106 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 107 | q->n_window = slots_num; |
| 108 | q->id = id; |
| 109 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 110 | /* slots_num must be power-of-two size, otherwise |
| 111 | * get_cmd_index is broken. */ |
| 112 | if (WARN_ON(!is_power_of_2(slots_num))) |
| 113 | return -EINVAL; |
| 114 | |
| 115 | q->low_mark = q->n_window / 4; |
| 116 | if (q->low_mark < 4) |
| 117 | q->low_mark = 4; |
| 118 | |
| 119 | q->high_mark = q->n_window / 8; |
| 120 | if (q->high_mark < 2) |
| 121 | q->high_mark = 2; |
| 122 | |
| 123 | q->write_ptr = 0; |
| 124 | q->read_ptr = 0; |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 129 | static int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans, |
| 130 | struct iwl_dma_ptr *ptr, size_t size) |
| 131 | { |
| 132 | if (WARN_ON(ptr->addr)) |
| 133 | return -EINVAL; |
| 134 | |
| 135 | ptr->addr = dma_alloc_coherent(trans->dev, size, |
| 136 | &ptr->dma, GFP_KERNEL); |
| 137 | if (!ptr->addr) |
| 138 | return -ENOMEM; |
| 139 | ptr->size = size; |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, |
| 144 | struct iwl_dma_ptr *ptr) |
| 145 | { |
| 146 | if (unlikely(!ptr->addr)) |
| 147 | return; |
| 148 | |
| 149 | dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma); |
| 150 | memset(ptr, 0, sizeof(*ptr)); |
| 151 | } |
| 152 | |
| 153 | static void iwl_pcie_txq_stuck_timer(unsigned long data) |
| 154 | { |
| 155 | struct iwl_txq *txq = (void *)data; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 156 | struct iwl_trans_pcie *trans_pcie = txq->trans_pcie; |
| 157 | struct iwl_trans *trans = iwl_trans_pcie_get_trans(trans_pcie); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 158 | |
| 159 | spin_lock(&txq->lock); |
| 160 | /* check if triggered erroneously */ |
| 161 | if (txq->q.read_ptr == txq->q.write_ptr) { |
| 162 | spin_unlock(&txq->lock); |
| 163 | return; |
| 164 | } |
| 165 | spin_unlock(&txq->lock); |
| 166 | |
| 167 | IWL_ERR(trans, "Queue %d stuck for %u ms.\n", txq->q.id, |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 168 | jiffies_to_msecs(txq->wd_timeout)); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 169 | |
Sara Sharon | 38398ef | 2016-06-30 11:48:30 +0300 | [diff] [blame] | 170 | iwl_trans_pcie_log_scd_error(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 171 | |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 172 | iwl_force_nmi(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 173 | } |
| 174 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 175 | /* |
| 176 | * iwl_pcie_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 177 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 178 | static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans, |
| 179 | struct iwl_txq *txq, u16 byte_cnt) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 180 | { |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 181 | struct iwlagn_scd_bc_tbl *scd_bc_tbl; |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 182 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 183 | int write_ptr = txq->q.write_ptr; |
| 184 | int txq_id = txq->q.id; |
| 185 | u8 sec_ctl = 0; |
| 186 | u8 sta_id = 0; |
| 187 | u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; |
| 188 | __le16 bc_ent; |
Emmanuel Grumbach | 132f98c | 2011-09-20 15:37:24 -0700 | [diff] [blame] | 189 | struct iwl_tx_cmd *tx_cmd = |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 190 | (void *) txq->entries[txq->q.write_ptr].cmd->payload; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 191 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 192 | scd_bc_tbl = trans_pcie->scd_bc_tbls.addr; |
| 193 | |
Emmanuel Grumbach | 132f98c | 2011-09-20 15:37:24 -0700 | [diff] [blame] | 194 | sta_id = tx_cmd->sta_id; |
| 195 | sec_ctl = tx_cmd->sec_ctl; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 196 | |
| 197 | switch (sec_ctl & TX_CMD_SEC_MSK) { |
| 198 | case TX_CMD_SEC_CCM: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 199 | len += IEEE80211_CCMP_MIC_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 200 | break; |
| 201 | case TX_CMD_SEC_TKIP: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 202 | len += IEEE80211_TKIP_ICV_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 203 | break; |
| 204 | case TX_CMD_SEC_WEP: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 205 | len += IEEE80211_WEP_IV_LEN + IEEE80211_WEP_ICV_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 206 | break; |
| 207 | } |
| 208 | |
Emmanuel Grumbach | 046db34 | 2012-12-05 15:07:54 +0200 | [diff] [blame] | 209 | if (trans_pcie->bc_table_dword) |
| 210 | len = DIV_ROUND_UP(len, 4); |
| 211 | |
Emmanuel Grumbach | 31f920b | 2015-07-02 14:53:02 +0300 | [diff] [blame] | 212 | if (WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX)) |
| 213 | return; |
| 214 | |
Emmanuel Grumbach | 046db34 | 2012-12-05 15:07:54 +0200 | [diff] [blame] | 215 | bc_ent = cpu_to_le16(len | (sta_id << 12)); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 216 | |
| 217 | scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent; |
| 218 | |
| 219 | if (write_ptr < TFD_QUEUE_SIZE_BC_DUP) |
| 220 | scd_bc_tbl[txq_id]. |
| 221 | tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent; |
| 222 | } |
| 223 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 224 | static void iwl_pcie_txq_inval_byte_cnt_tbl(struct iwl_trans *trans, |
| 225 | struct iwl_txq *txq) |
| 226 | { |
| 227 | struct iwl_trans_pcie *trans_pcie = |
| 228 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 229 | struct iwlagn_scd_bc_tbl *scd_bc_tbl = trans_pcie->scd_bc_tbls.addr; |
| 230 | int txq_id = txq->q.id; |
| 231 | int read_ptr = txq->q.read_ptr; |
| 232 | u8 sta_id = 0; |
| 233 | __le16 bc_ent; |
| 234 | struct iwl_tx_cmd *tx_cmd = |
| 235 | (void *)txq->entries[txq->q.read_ptr].cmd->payload; |
| 236 | |
| 237 | WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX); |
| 238 | |
| 239 | if (txq_id != trans_pcie->cmd_queue) |
| 240 | sta_id = tx_cmd->sta_id; |
| 241 | |
| 242 | bc_ent = cpu_to_le16(1 | (sta_id << 12)); |
| 243 | scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent; |
| 244 | |
| 245 | if (read_ptr < TFD_QUEUE_SIZE_BC_DUP) |
| 246 | scd_bc_tbl[txq_id]. |
| 247 | tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] = bc_ent; |
| 248 | } |
| 249 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 250 | /* |
| 251 | * iwl_pcie_txq_inc_wr_ptr - Send new write index to hardware |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 252 | */ |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 253 | static void iwl_pcie_txq_inc_wr_ptr(struct iwl_trans *trans, |
| 254 | struct iwl_txq *txq) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 255 | { |
Emmanuel Grumbach | 23e76d1 | 2014-01-20 09:50:29 +0200 | [diff] [blame] | 256 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 257 | u32 reg = 0; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 258 | int txq_id = txq->q.id; |
| 259 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 260 | lockdep_assert_held(&txq->lock); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 261 | |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 262 | /* |
| 263 | * explicitly wake up the NIC if: |
| 264 | * 1. shadow registers aren't enabled |
| 265 | * 2. NIC is woken up for CMD regardless of shadow outside this function |
| 266 | * 3. there is a chance that the NIC is asleep |
| 267 | */ |
| 268 | if (!trans->cfg->base_params->shadow_reg_enable && |
| 269 | txq_id != trans_pcie->cmd_queue && |
| 270 | test_bit(STATUS_TPOWER_PMI, &trans->status)) { |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 271 | /* |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 272 | * wake up nic if it's powered down ... |
| 273 | * uCode will wake up, and interrupt us again, so next |
| 274 | * time we'll skip this part. |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 275 | */ |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 276 | reg = iwl_read32(trans, CSR_UCODE_DRV_GP1); |
| 277 | |
| 278 | if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { |
| 279 | IWL_DEBUG_INFO(trans, "Tx queue %d requesting wakeup, GP1 = 0x%x\n", |
| 280 | txq_id, reg); |
| 281 | iwl_set_bit(trans, CSR_GP_CNTRL, |
| 282 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 283 | txq->need_update = true; |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 284 | return; |
| 285 | } |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 286 | } |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 287 | |
| 288 | /* |
| 289 | * if not in power-save mode, uCode will never sleep when we're |
| 290 | * trying to tx (during RFKILL, we're not trying to tx). |
| 291 | */ |
| 292 | IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq_id, txq->q.write_ptr); |
Emmanuel Grumbach | 0cd58ea | 2015-11-24 13:24:24 +0200 | [diff] [blame] | 293 | if (!txq->block) |
| 294 | iwl_write32(trans, HBUS_TARG_WRPTR, |
| 295 | txq->q.write_ptr | (txq_id << 8)); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 296 | } |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 297 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 298 | void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans) |
| 299 | { |
| 300 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 301 | int i; |
| 302 | |
| 303 | for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) { |
| 304 | struct iwl_txq *txq = &trans_pcie->txq[i]; |
| 305 | |
Emmanuel Grumbach | d090f87 | 2014-05-13 08:10:51 +0300 | [diff] [blame] | 306 | spin_lock_bh(&txq->lock); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 307 | if (trans_pcie->txq[i].need_update) { |
| 308 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
| 309 | trans_pcie->txq[i].need_update = false; |
| 310 | } |
Emmanuel Grumbach | d090f87 | 2014-05-13 08:10:51 +0300 | [diff] [blame] | 311 | spin_unlock_bh(&txq->lock); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 312 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 313 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 314 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 315 | static inline void *iwl_pcie_get_tfd(struct iwl_trans_pcie *trans_pcie, |
| 316 | struct iwl_txq *txq, int idx) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 317 | { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 318 | return txq->tfds + trans_pcie->tfd_size * idx; |
| 319 | } |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 320 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 321 | static inline dma_addr_t iwl_pcie_tfd_tb_get_addr(struct iwl_trans *trans, |
| 322 | void *tfd, u8 idx) |
| 323 | { |
| 324 | struct iwl_tfd *tfd_fh; |
| 325 | struct iwl_tfd_tb *tb; |
| 326 | dma_addr_t addr; |
| 327 | |
| 328 | if (trans->cfg->use_tfh) { |
| 329 | struct iwl_tfh_tfd *tfd_fh = (void *)tfd; |
| 330 | struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx]; |
| 331 | |
| 332 | return (dma_addr_t)(le64_to_cpu(tb->addr)); |
| 333 | } |
| 334 | |
| 335 | tfd_fh = (void *)tfd; |
| 336 | tb = &tfd_fh->tbs[idx]; |
| 337 | addr = get_unaligned_le32(&tb->lo); |
| 338 | |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 339 | if (sizeof(dma_addr_t) > sizeof(u32)) |
| 340 | addr |= |
| 341 | ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16; |
| 342 | |
| 343 | return addr; |
| 344 | } |
| 345 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 346 | static inline void iwl_pcie_tfd_set_tb(struct iwl_trans *trans, void *tfd, |
| 347 | u8 idx, dma_addr_t addr, u16 len) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 348 | { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 349 | if (trans->cfg->use_tfh) { |
| 350 | struct iwl_tfh_tfd *tfd_fh = (void *)tfd; |
| 351 | struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx]; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 352 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 353 | put_unaligned_le64(addr, &tb->addr); |
| 354 | tb->tb_len = cpu_to_le16(len); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 355 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 356 | tfd_fh->num_tbs = cpu_to_le16(idx + 1); |
| 357 | } else { |
| 358 | struct iwl_tfd *tfd_fh = (void *)tfd; |
| 359 | struct iwl_tfd_tb *tb = &tfd_fh->tbs[idx]; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 360 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 361 | u16 hi_n_len = len << 4; |
| 362 | |
| 363 | put_unaligned_le32(addr, &tb->lo); |
| 364 | if (sizeof(dma_addr_t) > sizeof(u32)) |
| 365 | hi_n_len |= ((addr >> 16) >> 16) & 0xF; |
| 366 | |
| 367 | tb->hi_n_len = cpu_to_le16(hi_n_len); |
| 368 | |
| 369 | tfd_fh->num_tbs = idx + 1; |
| 370 | } |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 373 | static inline u8 iwl_pcie_tfd_get_num_tbs(struct iwl_trans *trans, void *tfd) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 374 | { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 375 | struct iwl_tfd *tfd_fh; |
| 376 | |
| 377 | if (trans->cfg->use_tfh) { |
| 378 | struct iwl_tfh_tfd *tfd_fh = (void *)tfd; |
| 379 | |
| 380 | return le16_to_cpu(tfd_fh->num_tbs) & 0x1f; |
| 381 | } |
| 382 | |
| 383 | tfd_fh = (void *)tfd; |
| 384 | return tfd_fh->num_tbs & 0x1f; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 385 | } |
| 386 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 387 | static void iwl_pcie_tfd_unmap(struct iwl_trans *trans, |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 388 | struct iwl_cmd_meta *meta, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 389 | struct iwl_txq *txq, int index) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 390 | { |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 391 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 392 | int i, num_tbs; |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 393 | void *tfd = iwl_pcie_get_tfd(trans_pcie, txq, index); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 394 | |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 395 | /* Sanity check on number of chunks */ |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 396 | num_tbs = iwl_pcie_tfd_get_num_tbs(trans, tfd); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 397 | |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 398 | if (num_tbs >= trans_pcie->max_tbs) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 399 | IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 400 | /* @todo issue fatal error, it is quite serious situation */ |
| 401 | return; |
| 402 | } |
| 403 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 404 | /* first TB is never freed - it's the bidirectional DMA data */ |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 405 | |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 406 | for (i = 1; i < num_tbs; i++) { |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 407 | if (meta->tbs & BIT(i)) |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 408 | dma_unmap_page(trans->dev, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 409 | iwl_pcie_tfd_tb_get_addr(trans, tfd, i), |
| 410 | iwl_pcie_tfd_tb_get_len(trans, tfd, i), |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 411 | DMA_TO_DEVICE); |
| 412 | else |
| 413 | dma_unmap_single(trans->dev, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 414 | iwl_pcie_tfd_tb_get_addr(trans, tfd, |
| 415 | i), |
| 416 | iwl_pcie_tfd_tb_get_len(trans, tfd, |
| 417 | i), |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 418 | DMA_TO_DEVICE); |
| 419 | } |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 420 | |
| 421 | if (trans->cfg->use_tfh) { |
| 422 | struct iwl_tfh_tfd *tfd_fh = (void *)tfd; |
| 423 | |
| 424 | tfd_fh->num_tbs = 0; |
| 425 | } else { |
| 426 | struct iwl_tfd *tfd_fh = (void *)tfd; |
| 427 | |
| 428 | tfd_fh->num_tbs = 0; |
| 429 | } |
| 430 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 433 | /* |
| 434 | * iwl_pcie_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 435 | * @trans - transport private data |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 436 | * @txq - tx queue |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 437 | * @dma_dir - the direction of the DMA mapping |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 438 | * |
| 439 | * Does NOT advance any TFD circular buffer read/write indexes |
| 440 | * Does NOT free the TFD itself (which is within circular buffer) |
| 441 | */ |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 442 | static void iwl_pcie_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 443 | { |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 444 | /* rd_ptr is bounded by TFD_QUEUE_SIZE_MAX and |
| 445 | * idx is bounded by n_window |
| 446 | */ |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 447 | int rd_ptr = txq->q.read_ptr; |
| 448 | int idx = get_cmd_index(&txq->q, rd_ptr); |
| 449 | |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 450 | lockdep_assert_held(&txq->lock); |
| 451 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 452 | /* We have only q->n_window txq->entries, but we use |
| 453 | * TFD_QUEUE_SIZE_MAX tfds |
| 454 | */ |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 455 | iwl_pcie_tfd_unmap(trans, &txq->entries[idx].meta, txq, rd_ptr); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 456 | |
| 457 | /* free SKB */ |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 458 | if (txq->entries) { |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 459 | struct sk_buff *skb; |
| 460 | |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 461 | skb = txq->entries[idx].skb; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 462 | |
Emmanuel Grumbach | 909e9b2 | 2011-09-15 11:46:30 -0700 | [diff] [blame] | 463 | /* Can be called from irqs-disabled context |
| 464 | * If skb is not NULL, it means that the whole queue is being |
| 465 | * freed and that the queue is not empty - free the skb |
| 466 | */ |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 467 | if (skb) { |
Emmanuel Grumbach | ed277c9 | 2012-02-09 16:08:15 +0200 | [diff] [blame] | 468 | iwl_op_mode_free_skb(trans->op_mode, skb); |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 469 | txq->entries[idx].skb = NULL; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 470 | } |
| 471 | } |
| 472 | } |
| 473 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 474 | static int iwl_pcie_txq_build_tfd(struct iwl_trans *trans, struct iwl_txq *txq, |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 475 | dma_addr_t addr, u16 len, bool reset) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 476 | { |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 477 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 478 | struct iwl_queue *q; |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 479 | void *tfd; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 480 | u32 num_tbs; |
| 481 | |
| 482 | q = &txq->q; |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 483 | tfd = txq->tfds + trans_pcie->tfd_size * q->write_ptr; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 484 | |
| 485 | if (reset) |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 486 | memset(tfd, 0, trans_pcie->tfd_size); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 487 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 488 | num_tbs = iwl_pcie_tfd_get_num_tbs(trans, tfd); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 489 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 490 | /* Each TFD can point to a maximum max_tbs Tx buffers */ |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 491 | if (num_tbs >= trans_pcie->max_tbs) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 492 | IWL_ERR(trans, "Error can not send more than %d chunks\n", |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 493 | trans_pcie->max_tbs); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 494 | return -EINVAL; |
| 495 | } |
| 496 | |
Eliad Peller | 1092b9b | 2013-07-16 17:53:43 +0300 | [diff] [blame] | 497 | if (WARN(addr & ~IWL_TX_DMA_MASK, |
| 498 | "Unaligned address = %llx\n", (unsigned long long)addr)) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 499 | return -EINVAL; |
| 500 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 501 | iwl_pcie_tfd_set_tb(trans, tfd, num_tbs, addr, len); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 502 | |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 503 | return num_tbs; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 504 | } |
| 505 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 506 | static int iwl_pcie_txq_alloc(struct iwl_trans *trans, |
| 507 | struct iwl_txq *txq, int slots_num, |
| 508 | u32 txq_id) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 509 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 510 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 511 | size_t tfd_sz = trans_pcie->tfd_size * TFD_QUEUE_SIZE_MAX; |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 512 | size_t tb0_buf_sz; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 513 | int i; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 514 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 515 | if (WARN_ON(txq->entries || txq->tfds)) |
| 516 | return -EINVAL; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 517 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 518 | setup_timer(&txq->stuck_timer, iwl_pcie_txq_stuck_timer, |
| 519 | (unsigned long)txq); |
| 520 | txq->trans_pcie = trans_pcie; |
| 521 | |
| 522 | txq->q.n_window = slots_num; |
| 523 | |
| 524 | txq->entries = kcalloc(slots_num, |
| 525 | sizeof(struct iwl_pcie_txq_entry), |
| 526 | GFP_KERNEL); |
| 527 | |
| 528 | if (!txq->entries) |
| 529 | goto error; |
| 530 | |
| 531 | if (txq_id == trans_pcie->cmd_queue) |
| 532 | for (i = 0; i < slots_num; i++) { |
| 533 | txq->entries[i].cmd = |
| 534 | kmalloc(sizeof(struct iwl_device_cmd), |
| 535 | GFP_KERNEL); |
| 536 | if (!txq->entries[i].cmd) |
| 537 | goto error; |
| 538 | } |
| 539 | |
| 540 | /* Circular buffer of transmit frame descriptors (TFDs), |
| 541 | * shared with device */ |
| 542 | txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz, |
| 543 | &txq->q.dma_addr, GFP_KERNEL); |
Joe Perches | d0320f7 | 2013-03-14 13:07:21 +0000 | [diff] [blame] | 544 | if (!txq->tfds) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 545 | goto error; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 546 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 547 | BUILD_BUG_ON(IWL_FIRST_TB_SIZE_ALIGN != sizeof(*txq->first_tb_bufs)); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 548 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 549 | tb0_buf_sz = sizeof(*txq->first_tb_bufs) * slots_num; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 550 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 551 | txq->first_tb_bufs = dma_alloc_coherent(trans->dev, tb0_buf_sz, |
| 552 | &txq->first_tb_dma, |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 553 | GFP_KERNEL); |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 554 | if (!txq->first_tb_bufs) |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 555 | goto err_free_tfds; |
| 556 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 557 | txq->q.id = txq_id; |
| 558 | |
| 559 | return 0; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 560 | err_free_tfds: |
| 561 | dma_free_coherent(trans->dev, tfd_sz, txq->tfds, txq->q.dma_addr); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 562 | error: |
| 563 | if (txq->entries && txq_id == trans_pcie->cmd_queue) |
| 564 | for (i = 0; i < slots_num; i++) |
| 565 | kfree(txq->entries[i].cmd); |
| 566 | kfree(txq->entries); |
| 567 | txq->entries = NULL; |
| 568 | |
| 569 | return -ENOMEM; |
| 570 | |
| 571 | } |
| 572 | |
| 573 | static int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, |
| 574 | int slots_num, u32 txq_id) |
| 575 | { |
| 576 | int ret; |
| 577 | |
Johannes Berg | 43aa616 | 2014-02-27 14:24:36 +0100 | [diff] [blame] | 578 | txq->need_update = false; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 579 | |
| 580 | /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise |
| 581 | * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ |
| 582 | BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); |
| 583 | |
| 584 | /* Initialize queue's high/low-water marks, and head/tail indexes */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 585 | ret = iwl_queue_init(&txq->q, slots_num, txq_id); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 586 | if (ret) |
| 587 | return ret; |
| 588 | |
| 589 | spin_lock_init(&txq->lock); |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 590 | __skb_queue_head_init(&txq->overflow_q); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 591 | |
| 592 | /* |
| 593 | * Tell nic where to find circular buffer of Tx Frame Descriptors for |
| 594 | * given Tx queue, and enable the DMA channel used for that queue. |
| 595 | * Circular buffer (TFD queue in DRAM) physical base address */ |
Sara Sharon | e22744a | 2016-06-22 17:23:34 +0300 | [diff] [blame] | 596 | if (trans->cfg->use_tfh) |
| 597 | iwl_write_direct64(trans, |
| 598 | FH_MEM_CBBC_QUEUE(trans, txq_id), |
| 599 | txq->q.dma_addr); |
| 600 | else |
| 601 | iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(trans, txq_id), |
| 602 | txq->q.dma_addr >> 8); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 603 | |
| 604 | return 0; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 605 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 606 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 607 | static void iwl_pcie_free_tso_page(struct iwl_trans_pcie *trans_pcie, |
| 608 | struct sk_buff *skb) |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 609 | { |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 610 | struct page **page_ptr; |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 611 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 612 | page_ptr = (void *)((u8 *)skb->cb + trans_pcie->page_offs); |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 613 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 614 | if (*page_ptr) { |
| 615 | __free_page(*page_ptr); |
| 616 | *page_ptr = NULL; |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 617 | } |
| 618 | } |
| 619 | |
Sara Sharon | 01d11cd | 2016-03-09 17:38:47 +0200 | [diff] [blame] | 620 | static void iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans) |
| 621 | { |
| 622 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 623 | |
| 624 | lockdep_assert_held(&trans_pcie->reg_lock); |
| 625 | |
| 626 | if (trans_pcie->ref_cmd_in_flight) { |
| 627 | trans_pcie->ref_cmd_in_flight = false; |
| 628 | IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n"); |
Luca Coelho | c24c7f5 | 2016-03-30 20:59:27 +0300 | [diff] [blame] | 629 | iwl_trans_unref(trans); |
Sara Sharon | 01d11cd | 2016-03-09 17:38:47 +0200 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | if (!trans->cfg->base_params->apmg_wake_up_wa) |
| 633 | return; |
| 634 | if (WARN_ON(!trans_pcie->cmd_hold_nic_awake)) |
| 635 | return; |
| 636 | |
| 637 | trans_pcie->cmd_hold_nic_awake = false; |
| 638 | __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, |
| 639 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| 640 | } |
| 641 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 642 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 643 | * iwl_pcie_txq_unmap - Unmap any remaining DMA mappings and free skb's |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 644 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 645 | static void iwl_pcie_txq_unmap(struct iwl_trans *trans, int txq_id) |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 646 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 647 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 648 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 649 | struct iwl_queue *q = &txq->q; |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 650 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 651 | spin_lock_bh(&txq->lock); |
| 652 | while (q->write_ptr != q->read_ptr) { |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 653 | IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n", |
| 654 | txq_id, q->read_ptr); |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 655 | |
| 656 | if (txq_id != trans_pcie->cmd_queue) { |
| 657 | struct sk_buff *skb = txq->entries[q->read_ptr].skb; |
| 658 | |
| 659 | if (WARN_ON_ONCE(!skb)) |
| 660 | continue; |
| 661 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 662 | iwl_pcie_free_tso_page(trans_pcie, skb); |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 663 | } |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 664 | iwl_pcie_txq_free_tfd(trans, txq); |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 665 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr); |
Sara Sharon | 01d11cd | 2016-03-09 17:38:47 +0200 | [diff] [blame] | 666 | |
| 667 | if (q->read_ptr == q->write_ptr) { |
| 668 | unsigned long flags; |
| 669 | |
| 670 | spin_lock_irqsave(&trans_pcie->reg_lock, flags); |
| 671 | if (txq_id != trans_pcie->cmd_queue) { |
| 672 | IWL_DEBUG_RPM(trans, "Q %d - last tx freed\n", |
| 673 | q->id); |
Luca Coelho | c24c7f5 | 2016-03-30 20:59:27 +0300 | [diff] [blame] | 674 | iwl_trans_unref(trans); |
Sara Sharon | 01d11cd | 2016-03-09 17:38:47 +0200 | [diff] [blame] | 675 | } else { |
| 676 | iwl_pcie_clear_cmd_in_flight(trans); |
| 677 | } |
| 678 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 679 | } |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 680 | } |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 681 | txq->active = false; |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 682 | |
| 683 | while (!skb_queue_empty(&txq->overflow_q)) { |
| 684 | struct sk_buff *skb = __skb_dequeue(&txq->overflow_q); |
| 685 | |
| 686 | iwl_op_mode_free_skb(trans->op_mode, skb); |
| 687 | } |
| 688 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 689 | spin_unlock_bh(&txq->lock); |
Emmanuel Grumbach | 8a487b1 | 2013-06-13 13:10:00 +0300 | [diff] [blame] | 690 | |
| 691 | /* just in case - this queue may have been stopped */ |
| 692 | iwl_wake_queue(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 693 | } |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 694 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 695 | /* |
| 696 | * iwl_pcie_txq_free - Deallocate DMA queue. |
| 697 | * @txq: Transmit queue to deallocate. |
| 698 | * |
| 699 | * Empty queue by removing and destroying all BD's. |
| 700 | * Free all buffers. |
| 701 | * 0-fill, but do not free "txq" descriptor structure. |
| 702 | */ |
| 703 | static void iwl_pcie_txq_free(struct iwl_trans *trans, int txq_id) |
| 704 | { |
| 705 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 706 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 707 | struct device *dev = trans->dev; |
| 708 | int i; |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 709 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 710 | if (WARN_ON(!txq)) |
| 711 | return; |
| 712 | |
| 713 | iwl_pcie_txq_unmap(trans, txq_id); |
| 714 | |
| 715 | /* De-alloc array of command/tx buffers */ |
| 716 | if (txq_id == trans_pcie->cmd_queue) |
| 717 | for (i = 0; i < txq->q.n_window; i++) { |
Johannes Berg | 5d4185a | 2014-09-09 21:16:06 +0200 | [diff] [blame] | 718 | kzfree(txq->entries[i].cmd); |
| 719 | kzfree(txq->entries[i].free_buf); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | /* De-alloc circular buffer of TFDs */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 723 | if (txq->tfds) { |
| 724 | dma_free_coherent(dev, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 725 | trans_pcie->tfd_size * TFD_QUEUE_SIZE_MAX, |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 726 | txq->tfds, txq->q.dma_addr); |
Johannes Berg | d21fa2d | 2013-01-08 00:25:21 +0100 | [diff] [blame] | 727 | txq->q.dma_addr = 0; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 728 | txq->tfds = NULL; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 729 | |
| 730 | dma_free_coherent(dev, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 731 | sizeof(*txq->first_tb_bufs) * txq->q.n_window, |
| 732 | txq->first_tb_bufs, txq->first_tb_dma); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | kfree(txq->entries); |
| 736 | txq->entries = NULL; |
| 737 | |
| 738 | del_timer_sync(&txq->stuck_timer); |
| 739 | |
| 740 | /* 0-fill queue descriptor structure */ |
| 741 | memset(txq, 0, sizeof(*txq)); |
| 742 | } |
| 743 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 744 | void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr) |
| 745 | { |
| 746 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 747 | int nq = trans->cfg->base_params->num_of_queues; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 748 | int chan; |
| 749 | u32 reg_val; |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 750 | int clear_dwords = (SCD_TRANS_TBL_OFFSET_QUEUE(nq) - |
| 751 | SCD_CONTEXT_MEM_LOWER_BOUND) / sizeof(u32); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 752 | |
| 753 | /* make sure all queue are not stopped/used */ |
| 754 | memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); |
| 755 | memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used)); |
| 756 | |
Sara Sharon | ae79785 | 2016-06-30 16:36:24 +0300 | [diff] [blame] | 757 | if (trans->cfg->use_tfh) |
| 758 | return; |
| 759 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 760 | trans_pcie->scd_base_addr = |
| 761 | iwl_read_prph(trans, SCD_SRAM_BASE_ADDR); |
| 762 | |
| 763 | WARN_ON(scd_base_addr != 0 && |
| 764 | scd_base_addr != trans_pcie->scd_base_addr); |
| 765 | |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 766 | /* reset context data, TX status and translation data */ |
| 767 | iwl_trans_write_mem(trans, trans_pcie->scd_base_addr + |
| 768 | SCD_CONTEXT_MEM_LOWER_BOUND, |
| 769 | NULL, clear_dwords); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 770 | |
| 771 | iwl_write_prph(trans, SCD_DRAM_BASE_ADDR, |
| 772 | trans_pcie->scd_bc_tbls.dma >> 10); |
| 773 | |
| 774 | /* The chain extension of the SCD doesn't work well. This feature is |
| 775 | * enabled by default by the HW, so we need to disable it manually. |
| 776 | */ |
Emmanuel Grumbach | e03bbb6 | 2014-04-13 10:49:16 +0300 | [diff] [blame] | 777 | if (trans->cfg->base_params->scd_chain_ext_wa) |
| 778 | iwl_write_prph(trans, SCD_CHAINEXT_EN, 0); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 779 | |
| 780 | iwl_trans_ac_txq_enable(trans, trans_pcie->cmd_queue, |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 781 | trans_pcie->cmd_fifo, |
| 782 | trans_pcie->cmd_q_wdg_timeout); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 783 | |
| 784 | /* Activate all Tx DMA/FIFO channels */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 785 | iwl_scd_activate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 786 | |
| 787 | /* Enable DMA channel */ |
| 788 | for (chan = 0; chan < FH_TCSR_CHNL_NUM; chan++) |
| 789 | iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan), |
| 790 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | |
| 791 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); |
| 792 | |
| 793 | /* Update FH chicken bits */ |
| 794 | reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG); |
| 795 | iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG, |
| 796 | reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); |
| 797 | |
| 798 | /* Enable L1-Active */ |
Eran Harary | 3073d8c | 2013-12-29 14:09:59 +0200 | [diff] [blame] | 799 | if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) |
| 800 | iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, |
| 801 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 802 | } |
| 803 | |
Johannes Berg | ddaf5a5 | 2013-01-08 11:25:44 +0100 | [diff] [blame] | 804 | void iwl_trans_pcie_tx_reset(struct iwl_trans *trans) |
| 805 | { |
| 806 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 807 | int txq_id; |
| 808 | |
| 809 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 810 | txq_id++) { |
| 811 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
Sara Sharon | e22744a | 2016-06-22 17:23:34 +0300 | [diff] [blame] | 812 | if (trans->cfg->use_tfh) |
| 813 | iwl_write_direct64(trans, |
| 814 | FH_MEM_CBBC_QUEUE(trans, txq_id), |
| 815 | txq->q.dma_addr); |
| 816 | else |
| 817 | iwl_write_direct32(trans, |
| 818 | FH_MEM_CBBC_QUEUE(trans, txq_id), |
| 819 | txq->q.dma_addr >> 8); |
Johannes Berg | ddaf5a5 | 2013-01-08 11:25:44 +0100 | [diff] [blame] | 820 | iwl_pcie_txq_unmap(trans, txq_id); |
| 821 | txq->q.read_ptr = 0; |
| 822 | txq->q.write_ptr = 0; |
| 823 | } |
| 824 | |
| 825 | /* Tell NIC where to find the "keep warm" buffer */ |
| 826 | iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
| 827 | trans_pcie->kw.dma >> 4); |
| 828 | |
Emmanuel Grumbach | cd8f438 | 2015-01-29 21:34:00 +0200 | [diff] [blame] | 829 | /* |
| 830 | * Send 0 as the scd_base_addr since the device may have be reset |
| 831 | * while we were in WoWLAN in which case SCD_SRAM_BASE_ADDR will |
| 832 | * contain garbage. |
| 833 | */ |
| 834 | iwl_pcie_tx_start(trans, 0); |
Johannes Berg | ddaf5a5 | 2013-01-08 11:25:44 +0100 | [diff] [blame] | 835 | } |
| 836 | |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 837 | static void iwl_pcie_tx_stop_fh(struct iwl_trans *trans) |
| 838 | { |
| 839 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 840 | unsigned long flags; |
| 841 | int ch, ret; |
| 842 | u32 mask = 0; |
| 843 | |
| 844 | spin_lock(&trans_pcie->irq_lock); |
| 845 | |
Emmanuel Grumbach | 23ba934 | 2015-12-17 11:55:13 +0200 | [diff] [blame] | 846 | if (!iwl_trans_grab_nic_access(trans, &flags)) |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 847 | goto out; |
| 848 | |
| 849 | /* Stop each Tx DMA channel */ |
| 850 | for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) { |
| 851 | iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); |
| 852 | mask |= FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch); |
| 853 | } |
| 854 | |
| 855 | /* Wait for DMA channels to be idle */ |
| 856 | ret = iwl_poll_bit(trans, FH_TSSR_TX_STATUS_REG, mask, mask, 5000); |
| 857 | if (ret < 0) |
| 858 | IWL_ERR(trans, |
| 859 | "Failing on timeout while stopping DMA channel %d [0x%08x]\n", |
| 860 | ch, iwl_read32(trans, FH_TSSR_TX_STATUS_REG)); |
| 861 | |
| 862 | iwl_trans_release_nic_access(trans, &flags); |
| 863 | |
| 864 | out: |
| 865 | spin_unlock(&trans_pcie->irq_lock); |
| 866 | } |
| 867 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 868 | /* |
| 869 | * iwl_pcie_tx_stop - Stop all Tx DMA channels |
| 870 | */ |
| 871 | int iwl_pcie_tx_stop(struct iwl_trans *trans) |
| 872 | { |
| 873 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 874 | int txq_id; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 875 | |
| 876 | /* Turn off all Tx DMA fifos */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 877 | iwl_scd_deactivate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 878 | |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 879 | /* Turn off all Tx DMA channels */ |
| 880 | iwl_pcie_tx_stop_fh(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 881 | |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 882 | /* |
| 883 | * This function can be called before the op_mode disabled the |
| 884 | * queues. This happens when we have an rfkill interrupt. |
| 885 | * Since we stop Tx altogether - mark the queues as stopped. |
| 886 | */ |
| 887 | memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); |
| 888 | memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used)); |
| 889 | |
| 890 | /* This can happen: start_hw, stop_device */ |
| 891 | if (!trans_pcie->txq) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 892 | return 0; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 893 | |
| 894 | /* Unmap DMA from host system and free skb's */ |
| 895 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 896 | txq_id++) |
| 897 | iwl_pcie_txq_unmap(trans, txq_id); |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 898 | |
| 899 | return 0; |
| 900 | } |
| 901 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 902 | /* |
| 903 | * iwl_trans_tx_free - Free TXQ Context |
| 904 | * |
| 905 | * Destroy all TX DMA queues and structures |
| 906 | */ |
| 907 | void iwl_pcie_tx_free(struct iwl_trans *trans) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 908 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 909 | int txq_id; |
| 910 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 911 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 912 | /* Tx queues */ |
| 913 | if (trans_pcie->txq) { |
| 914 | for (txq_id = 0; |
| 915 | txq_id < trans->cfg->base_params->num_of_queues; txq_id++) |
| 916 | iwl_pcie_txq_free(trans, txq_id); |
| 917 | } |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 918 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 919 | kfree(trans_pcie->txq); |
| 920 | trans_pcie->txq = NULL; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 921 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 922 | iwl_pcie_free_dma_ptr(trans, &trans_pcie->kw); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 923 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 924 | iwl_pcie_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 925 | } |
| 926 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 927 | /* |
| 928 | * iwl_pcie_tx_alloc - allocate TX context |
| 929 | * Allocate all Tx DMA structures and initialize them |
| 930 | */ |
| 931 | static int iwl_pcie_tx_alloc(struct iwl_trans *trans) |
| 932 | { |
| 933 | int ret; |
| 934 | int txq_id, slots_num; |
| 935 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 936 | |
| 937 | u16 scd_bc_tbls_size = trans->cfg->base_params->num_of_queues * |
| 938 | sizeof(struct iwlagn_scd_bc_tbl); |
| 939 | |
| 940 | /*It is not allowed to alloc twice, so warn when this happens. |
| 941 | * We cannot rely on the previous allocation, so free and fail */ |
| 942 | if (WARN_ON(trans_pcie->txq)) { |
| 943 | ret = -EINVAL; |
| 944 | goto error; |
| 945 | } |
| 946 | |
| 947 | ret = iwl_pcie_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls, |
| 948 | scd_bc_tbls_size); |
| 949 | if (ret) { |
| 950 | IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); |
| 951 | goto error; |
| 952 | } |
| 953 | |
| 954 | /* Alloc keep-warm buffer */ |
| 955 | ret = iwl_pcie_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE); |
| 956 | if (ret) { |
| 957 | IWL_ERR(trans, "Keep Warm allocation failed\n"); |
| 958 | goto error; |
| 959 | } |
| 960 | |
| 961 | trans_pcie->txq = kcalloc(trans->cfg->base_params->num_of_queues, |
| 962 | sizeof(struct iwl_txq), GFP_KERNEL); |
| 963 | if (!trans_pcie->txq) { |
| 964 | IWL_ERR(trans, "Not enough memory for txq\n"); |
Dan Carpenter | 2ab9ba0 | 2013-08-11 02:03:21 +0300 | [diff] [blame] | 965 | ret = -ENOMEM; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 966 | goto error; |
| 967 | } |
| 968 | |
| 969 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
| 970 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 971 | txq_id++) { |
| 972 | slots_num = (txq_id == trans_pcie->cmd_queue) ? |
| 973 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
| 974 | ret = iwl_pcie_txq_alloc(trans, &trans_pcie->txq[txq_id], |
| 975 | slots_num, txq_id); |
| 976 | if (ret) { |
| 977 | IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); |
| 978 | goto error; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | return 0; |
| 983 | |
| 984 | error: |
| 985 | iwl_pcie_tx_free(trans); |
| 986 | |
| 987 | return ret; |
| 988 | } |
| 989 | int iwl_pcie_tx_init(struct iwl_trans *trans) |
| 990 | { |
| 991 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 992 | int ret; |
| 993 | int txq_id, slots_num; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 994 | bool alloc = false; |
| 995 | |
| 996 | if (!trans_pcie->txq) { |
| 997 | ret = iwl_pcie_tx_alloc(trans); |
| 998 | if (ret) |
| 999 | goto error; |
| 1000 | alloc = true; |
| 1001 | } |
| 1002 | |
Emmanuel Grumbach | 7b70bd6 | 2013-12-11 10:22:28 +0200 | [diff] [blame] | 1003 | spin_lock(&trans_pcie->irq_lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1004 | |
| 1005 | /* Turn off all Tx DMA fifos */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 1006 | iwl_scd_deactivate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1007 | |
| 1008 | /* Tell NIC where to find the "keep warm" buffer */ |
| 1009 | iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
| 1010 | trans_pcie->kw.dma >> 4); |
| 1011 | |
Emmanuel Grumbach | 7b70bd6 | 2013-12-11 10:22:28 +0200 | [diff] [blame] | 1012 | spin_unlock(&trans_pcie->irq_lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1013 | |
| 1014 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
| 1015 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 1016 | txq_id++) { |
| 1017 | slots_num = (txq_id == trans_pcie->cmd_queue) ? |
| 1018 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
| 1019 | ret = iwl_pcie_txq_init(trans, &trans_pcie->txq[txq_id], |
| 1020 | slots_num, txq_id); |
| 1021 | if (ret) { |
| 1022 | IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); |
| 1023 | goto error; |
| 1024 | } |
| 1025 | } |
| 1026 | |
Sara Sharon | ae79785 | 2016-06-30 16:36:24 +0300 | [diff] [blame] | 1027 | if (trans->cfg->use_tfh) { |
Sara Sharon | e22744a | 2016-06-22 17:23:34 +0300 | [diff] [blame] | 1028 | iwl_write_direct32(trans, TFH_TRANSFER_MODE, |
| 1029 | TFH_TRANSFER_MAX_PENDING_REQ | |
| 1030 | TFH_CHUNK_SIZE_128 | |
| 1031 | TFH_CHUNK_SPLIT_MODE); |
Sara Sharon | ae79785 | 2016-06-30 16:36:24 +0300 | [diff] [blame] | 1032 | return 0; |
| 1033 | } |
Sara Sharon | e22744a | 2016-06-22 17:23:34 +0300 | [diff] [blame] | 1034 | |
Haim Dreyfuss | 94ce9e5 | 2015-06-14 11:17:07 +0300 | [diff] [blame] | 1035 | iwl_set_bits_prph(trans, SCD_GP_CTRL, SCD_GP_CTRL_AUTO_ACTIVE_MODE); |
Emmanuel Grumbach | cb6bb12 | 2015-01-25 10:36:31 +0200 | [diff] [blame] | 1036 | if (trans->cfg->base_params->num_of_queues > 20) |
| 1037 | iwl_set_bits_prph(trans, SCD_GP_CTRL, |
| 1038 | SCD_GP_CTRL_ENABLE_31_QUEUES); |
| 1039 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1040 | return 0; |
| 1041 | error: |
| 1042 | /*Upon error, free only if we allocated something */ |
| 1043 | if (alloc) |
| 1044 | iwl_pcie_tx_free(trans); |
| 1045 | return ret; |
| 1046 | } |
| 1047 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1048 | static inline void iwl_pcie_txq_progress(struct iwl_txq *txq) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1049 | { |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 1050 | lockdep_assert_held(&txq->lock); |
| 1051 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1052 | if (!txq->wd_timeout) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1053 | return; |
| 1054 | |
| 1055 | /* |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 1056 | * station is asleep and we send data - that must |
| 1057 | * be uAPSD or PS-Poll. Don't rearm the timer. |
| 1058 | */ |
| 1059 | if (txq->frozen) |
| 1060 | return; |
| 1061 | |
| 1062 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1063 | * if empty delete timer, otherwise move timer forward |
| 1064 | * since we're making progress on this queue |
| 1065 | */ |
| 1066 | if (txq->q.read_ptr == txq->q.write_ptr) |
| 1067 | del_timer(&txq->stuck_timer); |
| 1068 | else |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1069 | mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | /* Frees buffers until index _not_ inclusive */ |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1073 | void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn, |
| 1074 | struct sk_buff_head *skbs) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1075 | { |
| 1076 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1077 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1078 | int tfd_num = ssn & (TFD_QUEUE_SIZE_MAX - 1); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1079 | struct iwl_queue *q = &txq->q; |
| 1080 | int last_to_free; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1081 | |
| 1082 | /* This function is not meant to release cmd queue*/ |
| 1083 | if (WARN_ON(txq_id == trans_pcie->cmd_queue)) |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1084 | return; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1085 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1086 | spin_lock_bh(&txq->lock); |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1087 | |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 1088 | if (!txq->active) { |
| 1089 | IWL_DEBUG_TX_QUEUES(trans, "Q %d inactive - ignoring idx %d\n", |
| 1090 | txq_id, ssn); |
| 1091 | goto out; |
| 1092 | } |
| 1093 | |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1094 | if (txq->q.read_ptr == tfd_num) |
| 1095 | goto out; |
| 1096 | |
| 1097 | IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d -> %d (%d)\n", |
| 1098 | txq_id, txq->q.read_ptr, tfd_num, ssn); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1099 | |
| 1100 | /*Since we free until index _not_ inclusive, the one before index is |
| 1101 | * the last we will free. This one must be used */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1102 | last_to_free = iwl_queue_dec_wrap(tfd_num); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1103 | |
Emmanuel Grumbach | 6ca6ebc | 2012-11-14 23:38:08 +0200 | [diff] [blame] | 1104 | if (!iwl_queue_used(q, last_to_free)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1105 | IWL_ERR(trans, |
| 1106 | "%s: Read index for DMA queue txq id (%d), last_to_free %d is out of range [0-%d] %d %d.\n", |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1107 | __func__, txq_id, last_to_free, TFD_QUEUE_SIZE_MAX, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1108 | q->write_ptr, q->read_ptr); |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1109 | goto out; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | if (WARN_ON(!skb_queue_empty(skbs))) |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1113 | goto out; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1114 | |
| 1115 | for (; |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1116 | q->read_ptr != tfd_num; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1117 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr)) { |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 1118 | struct sk_buff *skb = txq->entries[txq->q.read_ptr].skb; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1119 | |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 1120 | if (WARN_ON_ONCE(!skb)) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1121 | continue; |
| 1122 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 1123 | iwl_pcie_free_tso_page(trans_pcie, skb); |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 1124 | |
| 1125 | __skb_queue_tail(skbs, skb); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1126 | |
| 1127 | txq->entries[txq->q.read_ptr].skb = NULL; |
| 1128 | |
| 1129 | iwl_pcie_txq_inval_byte_cnt_tbl(trans, txq); |
| 1130 | |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1131 | iwl_pcie_txq_free_tfd(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1132 | } |
| 1133 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1134 | iwl_pcie_txq_progress(txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1135 | |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 1136 | if (iwl_queue_space(&txq->q) > txq->q.low_mark && |
| 1137 | test_bit(txq_id, trans_pcie->queue_stopped)) { |
Emmanuel Grumbach | 685b346 | 2016-02-23 11:34:17 +0200 | [diff] [blame] | 1138 | struct sk_buff_head overflow_skbs; |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 1139 | |
Emmanuel Grumbach | 685b346 | 2016-02-23 11:34:17 +0200 | [diff] [blame] | 1140 | __skb_queue_head_init(&overflow_skbs); |
| 1141 | skb_queue_splice_init(&txq->overflow_q, &overflow_skbs); |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 1142 | |
| 1143 | /* |
| 1144 | * This is tricky: we are in reclaim path which is non |
| 1145 | * re-entrant, so noone will try to take the access the |
| 1146 | * txq data from that path. We stopped tx, so we can't |
| 1147 | * have tx as well. Bottom line, we can unlock and re-lock |
| 1148 | * later. |
| 1149 | */ |
| 1150 | spin_unlock_bh(&txq->lock); |
| 1151 | |
Emmanuel Grumbach | 685b346 | 2016-02-23 11:34:17 +0200 | [diff] [blame] | 1152 | while (!skb_queue_empty(&overflow_skbs)) { |
| 1153 | struct sk_buff *skb = __skb_dequeue(&overflow_skbs); |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 1154 | struct iwl_device_cmd *dev_cmd_ptr; |
| 1155 | |
| 1156 | dev_cmd_ptr = *(void **)((u8 *)skb->cb + |
| 1157 | trans_pcie->dev_cmd_offs); |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 1158 | |
| 1159 | /* |
| 1160 | * Note that we can very well be overflowing again. |
| 1161 | * In that case, iwl_queue_space will be small again |
| 1162 | * and we won't wake mac80211's queue. |
| 1163 | */ |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 1164 | iwl_trans_pcie_tx(trans, skb, dev_cmd_ptr, txq_id); |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 1165 | } |
| 1166 | spin_lock_bh(&txq->lock); |
| 1167 | |
| 1168 | if (iwl_queue_space(&txq->q) > txq->q.low_mark) |
| 1169 | iwl_wake_queue(trans, txq); |
| 1170 | } |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1171 | |
| 1172 | if (q->read_ptr == q->write_ptr) { |
| 1173 | IWL_DEBUG_RPM(trans, "Q %d - last tx reclaimed\n", q->id); |
Luca Coelho | c24c7f5 | 2016-03-30 20:59:27 +0300 | [diff] [blame] | 1174 | iwl_trans_unref(trans); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1175 | } |
| 1176 | |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1177 | out: |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1178 | spin_unlock_bh(&txq->lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1179 | } |
| 1180 | |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1181 | static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans, |
| 1182 | const struct iwl_host_cmd *cmd) |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1183 | { |
| 1184 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1185 | int ret; |
| 1186 | |
| 1187 | lockdep_assert_held(&trans_pcie->reg_lock); |
| 1188 | |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1189 | if (!(cmd->flags & CMD_SEND_IN_IDLE) && |
| 1190 | !trans_pcie->ref_cmd_in_flight) { |
| 1191 | trans_pcie->ref_cmd_in_flight = true; |
| 1192 | IWL_DEBUG_RPM(trans, "set ref_cmd_in_flight - ref\n"); |
Luca Coelho | c24c7f5 | 2016-03-30 20:59:27 +0300 | [diff] [blame] | 1193 | iwl_trans_ref(trans); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1194 | } |
| 1195 | |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1196 | /* |
| 1197 | * wake up the NIC to make sure that the firmware will see the host |
| 1198 | * command - we will let the NIC sleep once all the host commands |
| 1199 | * returned. This needs to be done only on NICs that have |
| 1200 | * apmg_wake_up_wa set. |
| 1201 | */ |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1202 | if (trans->cfg->base_params->apmg_wake_up_wa && |
| 1203 | !trans_pcie->cmd_hold_nic_awake) { |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1204 | __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, |
| 1205 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1206 | |
| 1207 | ret = iwl_poll_bit(trans, CSR_GP_CNTRL, |
| 1208 | CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, |
| 1209 | (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | |
| 1210 | CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), |
| 1211 | 15000); |
| 1212 | if (ret < 0) { |
| 1213 | __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, |
| 1214 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1215 | IWL_ERR(trans, "Failed to wake NIC for hcmd\n"); |
| 1216 | return -EIO; |
| 1217 | } |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1218 | trans_pcie->cmd_hold_nic_awake = true; |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1219 | } |
| 1220 | |
| 1221 | return 0; |
| 1222 | } |
| 1223 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1224 | /* |
| 1225 | * iwl_pcie_cmdq_reclaim - Reclaim TX command queue entries already Tx'd |
| 1226 | * |
| 1227 | * When FW advances 'R' index, all entries between old and new 'R' index |
| 1228 | * need to be reclaimed. As result, some free space forms. If there is |
| 1229 | * enough free space (> low mark), wake the stack that feeds us. |
| 1230 | */ |
| 1231 | static void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx) |
| 1232 | { |
| 1233 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1234 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 1235 | struct iwl_queue *q = &txq->q; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1236 | unsigned long flags; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1237 | int nfreed = 0; |
| 1238 | |
| 1239 | lockdep_assert_held(&txq->lock); |
| 1240 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1241 | if ((idx >= TFD_QUEUE_SIZE_MAX) || (!iwl_queue_used(q, idx))) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1242 | IWL_ERR(trans, |
| 1243 | "%s: Read index for DMA queue txq id (%d), index %d is out of range [0-%d] %d %d.\n", |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1244 | __func__, txq_id, idx, TFD_QUEUE_SIZE_MAX, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1245 | q->write_ptr, q->read_ptr); |
| 1246 | return; |
| 1247 | } |
| 1248 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1249 | for (idx = iwl_queue_inc_wrap(idx); q->read_ptr != idx; |
| 1250 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1251 | |
| 1252 | if (nfreed++ > 0) { |
| 1253 | IWL_ERR(trans, "HCMD skipped: index (%d) %d %d\n", |
| 1254 | idx, q->write_ptr, q->read_ptr); |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 1255 | iwl_force_nmi(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1256 | } |
| 1257 | } |
| 1258 | |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1259 | if (q->read_ptr == q->write_ptr) { |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1260 | spin_lock_irqsave(&trans_pcie->reg_lock, flags); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1261 | iwl_pcie_clear_cmd_in_flight(trans); |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1262 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1263 | } |
| 1264 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1265 | iwl_pcie_txq_progress(txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1266 | } |
| 1267 | |
| 1268 | static int iwl_pcie_txq_set_ratid_map(struct iwl_trans *trans, u16 ra_tid, |
Emmanuel Grumbach | 1ce8658 | 2012-06-04 16:48:17 +0300 | [diff] [blame] | 1269 | u16 txq_id) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1270 | { |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1271 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1272 | u32 tbl_dw_addr; |
| 1273 | u32 tbl_dw; |
| 1274 | u16 scd_q2ratid; |
| 1275 | |
| 1276 | scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK; |
| 1277 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 1278 | tbl_dw_addr = trans_pcie->scd_base_addr + |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1279 | SCD_TRANS_TBL_OFFSET_QUEUE(txq_id); |
| 1280 | |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 1281 | tbl_dw = iwl_trans_read_mem32(trans, tbl_dw_addr); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1282 | |
| 1283 | if (txq_id & 0x1) |
| 1284 | tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); |
| 1285 | else |
| 1286 | tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); |
| 1287 | |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 1288 | iwl_trans_write_mem32(trans, tbl_dw_addr, tbl_dw); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1289 | |
| 1290 | return 0; |
| 1291 | } |
| 1292 | |
Emmanuel Grumbach | bd5f6a3 | 2013-04-28 14:05:22 +0300 | [diff] [blame] | 1293 | /* Receiver address (actually, Rx station's index into station table), |
| 1294 | * combined with Traffic ID (QOS priority), in format used by Tx Scheduler */ |
| 1295 | #define BUILD_RAxTID(sta_id, tid) (((sta_id) << 4) + (tid)) |
| 1296 | |
Johannes Berg | fea7795 | 2014-08-01 11:58:47 +0200 | [diff] [blame] | 1297 | void iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int txq_id, u16 ssn, |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1298 | const struct iwl_trans_txq_scd_cfg *cfg, |
| 1299 | unsigned int wdg_timeout) |
Johannes Berg | 70a18c5 | 2012-03-05 11:24:44 -0800 | [diff] [blame] | 1300 | { |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1301 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1302 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1303 | int fifo = -1; |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1304 | |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1305 | if (test_and_set_bit(txq_id, trans_pcie->queue_used)) |
| 1306 | WARN_ONCE(1, "queue %d already used - expect issues", txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1307 | |
Sara Sharon | ae79785 | 2016-06-30 16:36:24 +0300 | [diff] [blame] | 1308 | if (cfg && trans->cfg->use_tfh) |
| 1309 | WARN_ONCE(1, "Expected no calls to SCD configuration"); |
| 1310 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1311 | txq->wd_timeout = msecs_to_jiffies(wdg_timeout); |
| 1312 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1313 | if (cfg) { |
| 1314 | fifo = cfg->fifo; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1315 | |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1316 | /* Disable the scheduler prior configuring the cmd queue */ |
Emmanuel Grumbach | 3a736bc | 2014-09-10 11:16:41 +0300 | [diff] [blame] | 1317 | if (txq_id == trans_pcie->cmd_queue && |
| 1318 | trans_pcie->scd_set_active) |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1319 | iwl_scd_enable_set_active(trans, 0); |
| 1320 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1321 | /* Stop this Tx queue before configuring it */ |
| 1322 | iwl_scd_txq_set_inactive(trans, txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1323 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1324 | /* Set this queue as a chain-building queue unless it is CMD */ |
| 1325 | if (txq_id != trans_pcie->cmd_queue) |
| 1326 | iwl_scd_txq_set_chain(trans, txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1327 | |
Johannes Berg | 64ba893 | 2014-08-01 13:33:46 +0200 | [diff] [blame] | 1328 | if (cfg->aggregate) { |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1329 | u16 ra_tid = BUILD_RAxTID(cfg->sta_id, cfg->tid); |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1330 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1331 | /* Map receiver-address / traffic-ID to this queue */ |
| 1332 | iwl_pcie_txq_set_ratid_map(trans, ra_tid, txq_id); |
Emmanuel Grumbach | f477252 | 2013-07-24 14:15:21 +0300 | [diff] [blame] | 1333 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1334 | /* enable aggregations for the queue */ |
| 1335 | iwl_scd_txq_enable_agg(trans, txq_id); |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1336 | txq->ampdu = true; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1337 | } else { |
| 1338 | /* |
| 1339 | * disable aggregations for the queue, this will also |
| 1340 | * make the ra_tid mapping configuration irrelevant |
| 1341 | * since it is now a non-AGG queue. |
| 1342 | */ |
| 1343 | iwl_scd_txq_disable_agg(trans, txq_id); |
| 1344 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1345 | ssn = txq->q.read_ptr; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1346 | } |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1347 | } |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1348 | |
| 1349 | /* Place first TFD at index corresponding to start sequence number. |
| 1350 | * Assumes that ssn_idx is valid (!= 0xFFF) */ |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1351 | txq->q.read_ptr = (ssn & 0xff); |
| 1352 | txq->q.write_ptr = (ssn & 0xff); |
Emmanuel Grumbach | 0294d9e | 2015-01-05 16:52:55 +0200 | [diff] [blame] | 1353 | iwl_write_direct32(trans, HBUS_TARG_WRPTR, |
| 1354 | (ssn & 0xff) | (txq_id << 8)); |
Emmanuel Grumbach | 1ce8658 | 2012-06-04 16:48:17 +0300 | [diff] [blame] | 1355 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1356 | if (cfg) { |
| 1357 | u8 frame_limit = cfg->frame_limit; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1358 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1359 | iwl_write_prph(trans, SCD_QUEUE_RDPTR(txq_id), ssn); |
| 1360 | |
| 1361 | /* Set up Tx window size and frame limit for this queue */ |
| 1362 | iwl_trans_write_mem32(trans, trans_pcie->scd_base_addr + |
| 1363 | SCD_CONTEXT_QUEUE_OFFSET(txq_id), 0); |
| 1364 | iwl_trans_write_mem32(trans, |
| 1365 | trans_pcie->scd_base_addr + |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1366 | SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), |
| 1367 | ((frame_limit << SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1368 | SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1369 | ((frame_limit << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1370 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1371 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1372 | /* Set up status area in SRAM, map to Tx DMA/FIFO, activate */ |
| 1373 | iwl_write_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id), |
| 1374 | (1 << SCD_QUEUE_STTS_REG_POS_ACTIVE) | |
| 1375 | (cfg->fifo << SCD_QUEUE_STTS_REG_POS_TXF) | |
| 1376 | (1 << SCD_QUEUE_STTS_REG_POS_WSL) | |
| 1377 | SCD_QUEUE_STTS_REG_MSK); |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1378 | |
| 1379 | /* enable the scheduler for this queue (only) */ |
Emmanuel Grumbach | 3a736bc | 2014-09-10 11:16:41 +0300 | [diff] [blame] | 1380 | if (txq_id == trans_pcie->cmd_queue && |
| 1381 | trans_pcie->scd_set_active) |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1382 | iwl_scd_enable_set_active(trans, BIT(txq_id)); |
Emmanuel Grumbach | 0294d9e | 2015-01-05 16:52:55 +0200 | [diff] [blame] | 1383 | |
| 1384 | IWL_DEBUG_TX_QUEUES(trans, |
| 1385 | "Activate queue %d on FIFO %d WrPtr: %d\n", |
| 1386 | txq_id, fifo, ssn & 0xff); |
| 1387 | } else { |
| 1388 | IWL_DEBUG_TX_QUEUES(trans, |
| 1389 | "Activate queue %d WrPtr: %d\n", |
| 1390 | txq_id, ssn & 0xff); |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1391 | } |
| 1392 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1393 | txq->active = true; |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1394 | } |
| 1395 | |
Liad Kaufman | 42db09c | 2016-05-02 14:01:14 +0300 | [diff] [blame] | 1396 | void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id, |
| 1397 | bool shared_mode) |
| 1398 | { |
| 1399 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1400 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 1401 | |
| 1402 | txq->ampdu = !shared_mode; |
| 1403 | } |
| 1404 | |
Sara Sharon | 8aacf4b | 2016-07-04 15:40:11 +0300 | [diff] [blame] | 1405 | dma_addr_t iwl_trans_pcie_get_txq_byte_table(struct iwl_trans *trans, int txq) |
| 1406 | { |
| 1407 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1408 | |
| 1409 | return trans_pcie->scd_bc_tbls.dma + |
| 1410 | txq * sizeof(struct iwlagn_scd_bc_tbl); |
| 1411 | } |
| 1412 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1413 | void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id, |
| 1414 | bool configure_scd) |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 1415 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1416 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 986ea6c | 2012-09-30 16:25:43 +0200 | [diff] [blame] | 1417 | u32 stts_addr = trans_pcie->scd_base_addr + |
| 1418 | SCD_TX_STTS_QUEUE_OFFSET(txq_id); |
| 1419 | static const u32 zero_val[4] = {}; |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 1420 | |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 1421 | trans_pcie->txq[txq_id].frozen_expiry_remainder = 0; |
| 1422 | trans_pcie->txq[txq_id].frozen = false; |
| 1423 | |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 1424 | /* |
| 1425 | * Upon HW Rfkill - we stop the device, and then stop the queues |
| 1426 | * in the op_mode. Just for the sake of the simplicity of the op_mode, |
| 1427 | * allow the op_mode to call txq_disable after it already called |
| 1428 | * stop_device. |
| 1429 | */ |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1430 | if (!test_and_clear_bit(txq_id, trans_pcie->queue_used)) { |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 1431 | WARN_ONCE(test_bit(STATUS_DEVICE_ENABLED, &trans->status), |
| 1432 | "queue %d not used", txq_id); |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1433 | return; |
Emmanuel Grumbach | bc23773 | 2011-11-21 13:25:31 +0200 | [diff] [blame] | 1434 | } |
| 1435 | |
Sara Sharon | ae79785 | 2016-06-30 16:36:24 +0300 | [diff] [blame] | 1436 | if (configure_scd && trans->cfg->use_tfh) |
| 1437 | WARN_ONCE(1, "Expected no calls to SCD configuration"); |
| 1438 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1439 | if (configure_scd) { |
| 1440 | iwl_scd_txq_set_inactive(trans, txq_id); |
Emmanuel Grumbach | ac928f8 | 2012-10-14 16:36:36 +0200 | [diff] [blame] | 1441 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1442 | iwl_trans_write_mem(trans, stts_addr, (void *)zero_val, |
| 1443 | ARRAY_SIZE(zero_val)); |
| 1444 | } |
Emmanuel Grumbach | 986ea6c | 2012-09-30 16:25:43 +0200 | [diff] [blame] | 1445 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1446 | iwl_pcie_txq_unmap(trans, txq_id); |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 1447 | trans_pcie->txq[txq_id].ampdu = false; |
Emmanuel Grumbach | 6c3fd3f | 2012-10-18 12:38:37 +0200 | [diff] [blame] | 1448 | |
Emmanuel Grumbach | 1ce8658 | 2012-06-04 16:48:17 +0300 | [diff] [blame] | 1449 | IWL_DEBUG_TX_QUEUES(trans, "Deactivate queue %d\n", txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1450 | } |
| 1451 | |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1452 | /*************** HOST COMMAND QUEUE FUNCTIONS *****/ |
| 1453 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1454 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1455 | * iwl_pcie_enqueue_hcmd - enqueue a uCode command |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1456 | * @priv: device private data point |
Eliad Peller | e89044d | 2013-07-16 17:33:26 +0300 | [diff] [blame] | 1457 | * @cmd: a pointer to the ucode command structure |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1458 | * |
Eliad Peller | e89044d | 2013-07-16 17:33:26 +0300 | [diff] [blame] | 1459 | * The function returns < 0 values to indicate the operation |
| 1460 | * failed. On success, it returns the index (>= 0) of command in the |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1461 | * command queue. |
| 1462 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1463 | static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans, |
| 1464 | struct iwl_host_cmd *cmd) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1465 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1466 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1467 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1468 | struct iwl_queue *q = &txq->q; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1469 | struct iwl_device_cmd *out_cmd; |
| 1470 | struct iwl_cmd_meta *out_meta; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1471 | unsigned long flags; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1472 | void *dup_buf = NULL; |
Tomas Winkler | f367422 | 2008-08-04 16:00:44 +0800 | [diff] [blame] | 1473 | dma_addr_t phys_addr; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1474 | int idx; |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1475 | u16 copy_size, cmd_size, tb0_size; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1476 | bool had_nocopy = false; |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1477 | u8 group_id = iwl_cmd_groupid(cmd->id); |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1478 | int i, ret; |
Emmanuel Grumbach | 9679142 | 2012-07-24 01:58:32 +0300 | [diff] [blame] | 1479 | u32 cmd_pos; |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1480 | const u8 *cmddata[IWL_MAX_CMD_TBS_PER_TFD]; |
| 1481 | u16 cmdlen[IWL_MAX_CMD_TBS_PER_TFD]; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1482 | |
Johannes Berg | 88742c9 | 2015-06-30 15:31:22 +0200 | [diff] [blame] | 1483 | if (WARN(!trans_pcie->wide_cmd_header && |
| 1484 | group_id > IWL_ALWAYS_LONG_GROUP, |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1485 | "unsupported wide command %#x\n", cmd->id)) |
| 1486 | return -EINVAL; |
| 1487 | |
| 1488 | if (group_id != 0) { |
| 1489 | copy_size = sizeof(struct iwl_cmd_header_wide); |
| 1490 | cmd_size = sizeof(struct iwl_cmd_header_wide); |
| 1491 | } else { |
| 1492 | copy_size = sizeof(struct iwl_cmd_header); |
| 1493 | cmd_size = sizeof(struct iwl_cmd_header); |
| 1494 | } |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1495 | |
| 1496 | /* need one for the header if the first is NOCOPY */ |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1497 | BUILD_BUG_ON(IWL_MAX_CMD_TBS_PER_TFD > IWL_NUM_OF_TBS - 1); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1498 | |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1499 | for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1500 | cmddata[i] = cmd->data[i]; |
| 1501 | cmdlen[i] = cmd->len[i]; |
| 1502 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1503 | if (!cmd->len[i]) |
| 1504 | continue; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1505 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1506 | /* need at least IWL_FIRST_TB_SIZE copied */ |
| 1507 | if (copy_size < IWL_FIRST_TB_SIZE) { |
| 1508 | int copy = IWL_FIRST_TB_SIZE - copy_size; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1509 | |
| 1510 | if (copy > cmdlen[i]) |
| 1511 | copy = cmdlen[i]; |
| 1512 | cmdlen[i] -= copy; |
| 1513 | cmddata[i] += copy; |
| 1514 | copy_size += copy; |
| 1515 | } |
| 1516 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1517 | if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY) { |
| 1518 | had_nocopy = true; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1519 | if (WARN_ON(cmd->dataflags[i] & IWL_HCMD_DFL_DUP)) { |
| 1520 | idx = -EINVAL; |
| 1521 | goto free_dup_buf; |
| 1522 | } |
| 1523 | } else if (cmd->dataflags[i] & IWL_HCMD_DFL_DUP) { |
| 1524 | /* |
| 1525 | * This is also a chunk that isn't copied |
| 1526 | * to the static buffer so set had_nocopy. |
| 1527 | */ |
| 1528 | had_nocopy = true; |
| 1529 | |
| 1530 | /* only allowed once */ |
| 1531 | if (WARN_ON(dup_buf)) { |
| 1532 | idx = -EINVAL; |
| 1533 | goto free_dup_buf; |
| 1534 | } |
| 1535 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1536 | dup_buf = kmemdup(cmddata[i], cmdlen[i], |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1537 | GFP_ATOMIC); |
| 1538 | if (!dup_buf) |
| 1539 | return -ENOMEM; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1540 | } else { |
| 1541 | /* NOCOPY must not be followed by normal! */ |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1542 | if (WARN_ON(had_nocopy)) { |
| 1543 | idx = -EINVAL; |
| 1544 | goto free_dup_buf; |
| 1545 | } |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1546 | copy_size += cmdlen[i]; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1547 | } |
| 1548 | cmd_size += cmd->len[i]; |
| 1549 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1550 | |
Johannes Berg | 3e41ace | 2011-04-18 09:12:37 -0700 | [diff] [blame] | 1551 | /* |
| 1552 | * If any of the command structures end up being larger than |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1553 | * the TFD_MAX_PAYLOAD_SIZE and they aren't dynamically |
| 1554 | * allocated into separate TFDs, then we will need to |
| 1555 | * increase the size of the buffers. |
Johannes Berg | 3e41ace | 2011-04-18 09:12:37 -0700 | [diff] [blame] | 1556 | */ |
Johannes Berg | 2a79e45 | 2012-09-26 13:32:13 +0200 | [diff] [blame] | 1557 | if (WARN(copy_size > TFD_MAX_PAYLOAD_SIZE, |
| 1558 | "Command %s (%#x) is too large (%d bytes)\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1559 | iwl_get_cmd_string(trans, cmd->id), |
| 1560 | cmd->id, copy_size)) { |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1561 | idx = -EINVAL; |
| 1562 | goto free_dup_buf; |
| 1563 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1564 | |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1565 | spin_lock_bh(&txq->lock); |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1566 | |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1567 | if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1568 | spin_unlock_bh(&txq->lock); |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1569 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1570 | IWL_ERR(trans, "No space in command queue\n"); |
Johannes Berg | 0e78184 | 2012-03-06 13:30:49 -0800 | [diff] [blame] | 1571 | iwl_op_mode_cmd_queue_full(trans->op_mode); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1572 | idx = -ENOSPC; |
| 1573 | goto free_dup_buf; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1574 | } |
| 1575 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1576 | idx = get_cmd_index(q, q->write_ptr); |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1577 | out_cmd = txq->entries[idx].cmd; |
| 1578 | out_meta = &txq->entries[idx].meta; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1579 | |
Daniel C Halperin | 8ce73f3 | 2009-07-31 14:28:06 -0700 | [diff] [blame] | 1580 | memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */ |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1581 | if (cmd->flags & CMD_WANT_SKB) |
| 1582 | out_meta->source = cmd; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1583 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1584 | /* set up the header */ |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1585 | if (group_id != 0) { |
| 1586 | out_cmd->hdr_wide.cmd = iwl_cmd_opcode(cmd->id); |
| 1587 | out_cmd->hdr_wide.group_id = group_id; |
| 1588 | out_cmd->hdr_wide.version = iwl_cmd_version(cmd->id); |
| 1589 | out_cmd->hdr_wide.length = |
| 1590 | cpu_to_le16(cmd_size - |
| 1591 | sizeof(struct iwl_cmd_header_wide)); |
| 1592 | out_cmd->hdr_wide.reserved = 0; |
| 1593 | out_cmd->hdr_wide.sequence = |
| 1594 | cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) | |
| 1595 | INDEX_TO_SEQ(q->write_ptr)); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1596 | |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1597 | cmd_pos = sizeof(struct iwl_cmd_header_wide); |
| 1598 | copy_size = sizeof(struct iwl_cmd_header_wide); |
| 1599 | } else { |
| 1600 | out_cmd->hdr.cmd = iwl_cmd_opcode(cmd->id); |
| 1601 | out_cmd->hdr.sequence = |
| 1602 | cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) | |
| 1603 | INDEX_TO_SEQ(q->write_ptr)); |
| 1604 | out_cmd->hdr.group_id = 0; |
| 1605 | |
| 1606 | cmd_pos = sizeof(struct iwl_cmd_header); |
| 1607 | copy_size = sizeof(struct iwl_cmd_header); |
| 1608 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1609 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1610 | /* and copy the data that needs to be copied */ |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1611 | for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { |
Johannes Berg | 4d07500 | 2014-04-24 10:41:31 +0200 | [diff] [blame] | 1612 | int copy; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1613 | |
Emmanuel Grumbach | cc904c7 | 2013-03-14 08:35:06 +0200 | [diff] [blame] | 1614 | if (!cmd->len[i]) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1615 | continue; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1616 | |
Johannes Berg | 4d07500 | 2014-04-24 10:41:31 +0200 | [diff] [blame] | 1617 | /* copy everything if not nocopy/dup */ |
| 1618 | if (!(cmd->dataflags[i] & (IWL_HCMD_DFL_NOCOPY | |
| 1619 | IWL_HCMD_DFL_DUP))) { |
| 1620 | copy = cmd->len[i]; |
| 1621 | |
| 1622 | memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); |
| 1623 | cmd_pos += copy; |
| 1624 | copy_size += copy; |
| 1625 | continue; |
| 1626 | } |
| 1627 | |
| 1628 | /* |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1629 | * Otherwise we need at least IWL_FIRST_TB_SIZE copied |
| 1630 | * in total (for bi-directional DMA), but copy up to what |
Johannes Berg | 4d07500 | 2014-04-24 10:41:31 +0200 | [diff] [blame] | 1631 | * we can fit into the payload for debug dump purposes. |
| 1632 | */ |
| 1633 | copy = min_t(int, TFD_MAX_PAYLOAD_SIZE - cmd_pos, cmd->len[i]); |
| 1634 | |
| 1635 | memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); |
| 1636 | cmd_pos += copy; |
| 1637 | |
| 1638 | /* However, treat copy_size the proper way, we need it below */ |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1639 | if (copy_size < IWL_FIRST_TB_SIZE) { |
| 1640 | copy = IWL_FIRST_TB_SIZE - copy_size; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1641 | |
| 1642 | if (copy > cmd->len[i]) |
| 1643 | copy = cmd->len[i]; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1644 | copy_size += copy; |
| 1645 | } |
Emmanuel Grumbach | 9679142 | 2012-07-24 01:58:32 +0300 | [diff] [blame] | 1646 | } |
| 1647 | |
Johannes Berg | d9fb646 | 2012-03-26 08:23:39 -0700 | [diff] [blame] | 1648 | IWL_DEBUG_HC(trans, |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1649 | "Sending command %s (%.2x.%.2x), seq: 0x%04X, %d bytes at %d[%d]:%d\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1650 | iwl_get_cmd_string(trans, cmd->id), |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1651 | group_id, out_cmd->hdr.cmd, |
| 1652 | le16_to_cpu(out_cmd->hdr.sequence), |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1653 | cmd_size, q->write_ptr, idx, trans_pcie->cmd_queue); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1654 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1655 | /* start the TFD with the minimum copy bytes */ |
| 1656 | tb0_size = min_t(int, copy_size, IWL_FIRST_TB_SIZE); |
| 1657 | memcpy(&txq->first_tb_bufs[idx], &out_cmd->hdr, tb0_size); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1658 | iwl_pcie_txq_build_tfd(trans, txq, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1659 | iwl_pcie_get_first_tb_dma(txq, idx), |
| 1660 | tb0_size, true); |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1661 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1662 | /* map first command fragment, if any remains */ |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1663 | if (copy_size > tb0_size) { |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1664 | phys_addr = dma_map_single(trans->dev, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1665 | ((u8 *)&out_cmd->hdr) + tb0_size, |
| 1666 | copy_size - tb0_size, |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1667 | DMA_TO_DEVICE); |
| 1668 | if (dma_mapping_error(trans->dev, phys_addr)) { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 1669 | iwl_pcie_tfd_unmap(trans, out_meta, txq, q->write_ptr); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1670 | idx = -ENOMEM; |
| 1671 | goto out; |
| 1672 | } |
| 1673 | |
| 1674 | iwl_pcie_txq_build_tfd(trans, txq, phys_addr, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 1675 | copy_size - tb0_size, false); |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1676 | } |
| 1677 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1678 | /* map the remaining (adjusted) nocopy/dup fragments */ |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1679 | for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1680 | const void *data = cmddata[i]; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1681 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1682 | if (!cmdlen[i]) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1683 | continue; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1684 | if (!(cmd->dataflags[i] & (IWL_HCMD_DFL_NOCOPY | |
| 1685 | IWL_HCMD_DFL_DUP))) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1686 | continue; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1687 | if (cmd->dataflags[i] & IWL_HCMD_DFL_DUP) |
| 1688 | data = dup_buf; |
| 1689 | phys_addr = dma_map_single(trans->dev, (void *)data, |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1690 | cmdlen[i], DMA_TO_DEVICE); |
Emmanuel Grumbach | 1042db2 | 2012-01-03 16:56:15 +0200 | [diff] [blame] | 1691 | if (dma_mapping_error(trans->dev, phys_addr)) { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 1692 | iwl_pcie_tfd_unmap(trans, out_meta, txq, q->write_ptr); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1693 | idx = -ENOMEM; |
| 1694 | goto out; |
| 1695 | } |
| 1696 | |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1697 | iwl_pcie_txq_build_tfd(trans, txq, phys_addr, cmdlen[i], false); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1698 | } |
Reinette Chatre | df833b1 | 2009-04-21 10:55:48 -0700 | [diff] [blame] | 1699 | |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 1700 | BUILD_BUG_ON(IWL_TFH_NUM_TBS > sizeof(out_meta->tbs) * BITS_PER_BYTE); |
Emmanuel Grumbach | afaf6b5 | 2011-07-08 08:46:09 -0700 | [diff] [blame] | 1701 | out_meta->flags = cmd->flags; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1702 | if (WARN_ON_ONCE(txq->entries[idx].free_buf)) |
Johannes Berg | 5d4185a | 2014-09-09 21:16:06 +0200 | [diff] [blame] | 1703 | kzfree(txq->entries[idx].free_buf); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1704 | txq->entries[idx].free_buf = dup_buf; |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1705 | |
Aviya Erenfeld | ab02165 | 2015-06-09 16:45:52 +0300 | [diff] [blame] | 1706 | trace_iwlwifi_dev_hcmd(trans->dev, cmd, cmd_size, &out_cmd->hdr_wide); |
Reinette Chatre | df833b1 | 2009-04-21 10:55:48 -0700 | [diff] [blame] | 1707 | |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 1708 | /* start timer if queue currently empty */ |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1709 | if (q->read_ptr == q->write_ptr && txq->wd_timeout) |
| 1710 | mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 1711 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1712 | spin_lock_irqsave(&trans_pcie->reg_lock, flags); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1713 | ret = iwl_pcie_set_cmd_in_flight(trans, cmd); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1714 | if (ret < 0) { |
| 1715 | idx = ret; |
| 1716 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1717 | goto out; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1718 | } |
| 1719 | |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1720 | /* Increment and update queue's write index */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1721 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1722 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1723 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1724 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1725 | |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1726 | out: |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1727 | spin_unlock_bh(&txq->lock); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1728 | free_dup_buf: |
| 1729 | if (idx < 0) |
| 1730 | kfree(dup_buf); |
Abhijeet Kolekar | 7bfedc5 | 2010-02-03 13:47:56 -0800 | [diff] [blame] | 1731 | return idx; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1732 | } |
| 1733 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1734 | /* |
| 1735 | * iwl_pcie_hcmd_complete - Pull unused buffers off the queue and reclaim them |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1736 | * @rxb: Rx buffer to reclaim |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1737 | */ |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1738 | void iwl_pcie_hcmd_complete(struct iwl_trans *trans, |
Johannes Berg | f7e6469 | 2015-06-23 21:58:17 +0200 | [diff] [blame] | 1739 | struct iwl_rx_cmd_buffer *rxb) |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1740 | { |
Zhu Yi | 2f30122 | 2009-10-09 17:19:45 +0800 | [diff] [blame] | 1741 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1742 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1743 | u8 group_id = iwl_cmd_groupid(pkt->hdr.group_id); |
| 1744 | u32 cmd_id; |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1745 | int txq_id = SEQ_TO_QUEUE(sequence); |
| 1746 | int index = SEQ_TO_INDEX(sequence); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1747 | int cmd_index; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1748 | struct iwl_device_cmd *cmd; |
| 1749 | struct iwl_cmd_meta *meta; |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1750 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1751 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1752 | |
| 1753 | /* If a Tx command is being handled and it isn't in the actual |
| 1754 | * command queue then there a command routing bug has been introduced |
| 1755 | * in the queue management code. */ |
Meenakshi Venkataraman | c6f600f | 2012-03-08 11:29:12 -0800 | [diff] [blame] | 1756 | if (WARN(txq_id != trans_pcie->cmd_queue, |
Johannes Berg | 13bb948 | 2010-08-23 10:46:33 +0200 | [diff] [blame] | 1757 | "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n", |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1758 | txq_id, trans_pcie->cmd_queue, sequence, |
| 1759 | trans_pcie->txq[trans_pcie->cmd_queue].q.read_ptr, |
| 1760 | trans_pcie->txq[trans_pcie->cmd_queue].q.write_ptr)) { |
Emmanuel Grumbach | 3e10cae | 2011-09-06 09:31:18 -0700 | [diff] [blame] | 1761 | iwl_print_hex_error(trans, pkt, 32); |
Johannes Berg | 55d6a3c | 2008-09-23 19:18:43 +0200 | [diff] [blame] | 1762 | return; |
Winkler, Tomas | 01ef9323 | 2008-11-07 09:58:45 -0800 | [diff] [blame] | 1763 | } |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1764 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1765 | spin_lock_bh(&txq->lock); |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1766 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1767 | cmd_index = get_cmd_index(&txq->q, index); |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1768 | cmd = txq->entries[cmd_index].cmd; |
| 1769 | meta = &txq->entries[cmd_index].meta; |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1770 | cmd_id = iwl_cmd_id(cmd->hdr.cmd, group_id, 0); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1771 | |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 1772 | iwl_pcie_tfd_unmap(trans, meta, txq, index); |
Reinette Chatre | c33de62 | 2009-10-30 14:36:10 -0700 | [diff] [blame] | 1773 | |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1774 | /* Input error checking is done when commands are added to queue. */ |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1775 | if (meta->flags & CMD_WANT_SKB) { |
Johannes Berg | 48a2d66 | 2012-03-05 11:24:39 -0800 | [diff] [blame] | 1776 | struct page *p = rxb_steal_page(rxb); |
Stanislaw Gruszka | 2624e96 | 2011-04-20 16:02:58 +0200 | [diff] [blame] | 1777 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1778 | meta->source->resp_pkt = pkt; |
| 1779 | meta->source->_rx_page_addr = (unsigned long)page_address(p); |
Johannes Berg | b2cf410 | 2012-04-09 17:46:51 -0700 | [diff] [blame] | 1780 | meta->source->_rx_page_order = trans_pcie->rx_page_order; |
Stanislaw Gruszka | 2624e96 | 2011-04-20 16:02:58 +0200 | [diff] [blame] | 1781 | } |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1782 | |
Emmanuel Grumbach | dcbb474 | 2015-11-24 15:17:37 +0200 | [diff] [blame] | 1783 | if (meta->flags & CMD_WANT_ASYNC_CALLBACK) |
| 1784 | iwl_op_mode_async_cb(trans->op_mode, cmd); |
| 1785 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1786 | iwl_pcie_cmdq_reclaim(trans, txq_id, index); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1787 | |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1788 | if (!(meta->flags & CMD_ASYNC)) { |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1789 | if (!test_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status)) { |
Wey-Yi Guy | 05c89b9 | 2011-10-10 07:26:48 -0700 | [diff] [blame] | 1790 | IWL_WARN(trans, |
| 1791 | "HCMD_ACTIVE already clear for command %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1792 | iwl_get_cmd_string(trans, cmd_id)); |
Wey-Yi Guy | 05c89b9 | 2011-10-10 07:26:48 -0700 | [diff] [blame] | 1793 | } |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1794 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1795 | IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1796 | iwl_get_cmd_string(trans, cmd_id)); |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1797 | wake_up(&trans_pcie->wait_command_queue); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1798 | } |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1799 | |
Luciano Coelho | 4cbb8e50 | 2015-08-18 16:02:38 +0300 | [diff] [blame] | 1800 | if (meta->flags & CMD_MAKE_TRANS_IDLE) { |
| 1801 | IWL_DEBUG_INFO(trans, "complete %s - mark trans as idle\n", |
| 1802 | iwl_get_cmd_string(trans, cmd->hdr.cmd)); |
| 1803 | set_bit(STATUS_TRANS_IDLE, &trans->status); |
| 1804 | wake_up(&trans_pcie->d0i3_waitq); |
| 1805 | } |
| 1806 | |
| 1807 | if (meta->flags & CMD_WAKE_UP_TRANS) { |
| 1808 | IWL_DEBUG_INFO(trans, "complete %s - clear trans idle flag\n", |
| 1809 | iwl_get_cmd_string(trans, cmd->hdr.cmd)); |
| 1810 | clear_bit(STATUS_TRANS_IDLE, &trans->status); |
| 1811 | wake_up(&trans_pcie->d0i3_waitq); |
| 1812 | } |
| 1813 | |
Zhu Yi | dd48744 | 2010-03-22 02:28:41 -0700 | [diff] [blame] | 1814 | meta->flags = 0; |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1815 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1816 | spin_unlock_bh(&txq->lock); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1817 | } |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1818 | |
Johannes Berg | 9439eac | 2013-10-09 09:59:25 +0200 | [diff] [blame] | 1819 | #define HOST_COMPLETE_TIMEOUT (2 * HZ) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1820 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1821 | static int iwl_pcie_send_hcmd_async(struct iwl_trans *trans, |
| 1822 | struct iwl_host_cmd *cmd) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1823 | { |
| 1824 | int ret; |
| 1825 | |
| 1826 | /* An asynchronous command can not expect an SKB to be set. */ |
| 1827 | if (WARN_ON(cmd->flags & CMD_WANT_SKB)) |
| 1828 | return -EINVAL; |
| 1829 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1830 | ret = iwl_pcie_enqueue_hcmd(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1831 | if (ret < 0) { |
Johannes Berg | 721c32f | 2012-03-06 13:30:40 -0800 | [diff] [blame] | 1832 | IWL_ERR(trans, |
Todd Previte | b36b110 | 2011-11-10 06:55:02 -0800 | [diff] [blame] | 1833 | "Error sending %s: enqueue_hcmd failed: %d\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1834 | iwl_get_cmd_string(trans, cmd->id), ret); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1835 | return ret; |
| 1836 | } |
| 1837 | return 0; |
| 1838 | } |
| 1839 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1840 | static int iwl_pcie_send_hcmd_sync(struct iwl_trans *trans, |
| 1841 | struct iwl_host_cmd *cmd) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1842 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1843 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1844 | int cmd_idx; |
| 1845 | int ret; |
| 1846 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1847 | IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1848 | iwl_get_cmd_string(trans, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1849 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1850 | if (WARN(test_and_set_bit(STATUS_SYNC_HCMD_ACTIVE, |
| 1851 | &trans->status), |
Johannes Berg | bcbb8c9 | 2013-10-28 15:50:55 +0100 | [diff] [blame] | 1852 | "Command %s: a command is already active!\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1853 | iwl_get_cmd_string(trans, cmd->id))) |
Johannes Berg | 2cc39c9 | 2012-03-06 13:30:41 -0800 | [diff] [blame] | 1854 | return -EIO; |
Johannes Berg | 2cc39c9 | 2012-03-06 13:30:41 -0800 | [diff] [blame] | 1855 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1856 | IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1857 | iwl_get_cmd_string(trans, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1858 | |
Luca Coelho | 71b1230 | 2016-03-11 12:12:16 +0200 | [diff] [blame] | 1859 | if (pm_runtime_suspended(&trans_pcie->pci_dev->dev)) { |
| 1860 | ret = wait_event_timeout(trans_pcie->d0i3_waitq, |
| 1861 | pm_runtime_active(&trans_pcie->pci_dev->dev), |
| 1862 | msecs_to_jiffies(IWL_TRANS_IDLE_TIMEOUT)); |
| 1863 | if (!ret) { |
| 1864 | IWL_ERR(trans, "Timeout exiting D0i3 before hcmd\n"); |
| 1865 | return -ETIMEDOUT; |
| 1866 | } |
| 1867 | } |
| 1868 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1869 | cmd_idx = iwl_pcie_enqueue_hcmd(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1870 | if (cmd_idx < 0) { |
| 1871 | ret = cmd_idx; |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1872 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Johannes Berg | 721c32f | 2012-03-06 13:30:40 -0800 | [diff] [blame] | 1873 | IWL_ERR(trans, |
Todd Previte | b36b110 | 2011-11-10 06:55:02 -0800 | [diff] [blame] | 1874 | "Error sending %s: enqueue_hcmd failed: %d\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1875 | iwl_get_cmd_string(trans, cmd->id), ret); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1876 | return ret; |
| 1877 | } |
| 1878 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1879 | ret = wait_event_timeout(trans_pcie->wait_command_queue, |
| 1880 | !test_bit(STATUS_SYNC_HCMD_ACTIVE, |
| 1881 | &trans->status), |
| 1882 | HOST_COMPLETE_TIMEOUT); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1883 | if (!ret) { |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1884 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
| 1885 | struct iwl_queue *q = &txq->q; |
Wey-Yi Guy | d10630a | 2011-10-10 07:26:46 -0700 | [diff] [blame] | 1886 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1887 | IWL_ERR(trans, "Error sending %s: time out after %dms.\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1888 | iwl_get_cmd_string(trans, cmd->id), |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1889 | jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1890 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1891 | IWL_ERR(trans, "Current CMD queue read_ptr %d write_ptr %d\n", |
| 1892 | q->read_ptr, q->write_ptr); |
Wey-Yi Guy | d10630a | 2011-10-10 07:26:46 -0700 | [diff] [blame] | 1893 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1894 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1895 | IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1896 | iwl_get_cmd_string(trans, cmd->id)); |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1897 | ret = -ETIMEDOUT; |
Emmanuel Grumbach | 42550a5 | 2013-09-11 14:16:20 +0300 | [diff] [blame] | 1898 | |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 1899 | iwl_force_nmi(trans); |
Arik Nemtsov | 2a988e9 | 2013-12-01 13:50:40 +0200 | [diff] [blame] | 1900 | iwl_trans_fw_error(trans); |
Emmanuel Grumbach | 42550a5 | 2013-09-11 14:16:20 +0300 | [diff] [blame] | 1901 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1902 | goto cancel; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1903 | } |
| 1904 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1905 | if (test_bit(STATUS_FW_ERROR, &trans->status)) { |
Johannes Berg | d18aa87 | 2012-11-06 16:36:21 +0100 | [diff] [blame] | 1906 | IWL_ERR(trans, "FW error in SYNC CMD %s\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1907 | iwl_get_cmd_string(trans, cmd->id)); |
Johannes Berg | b656fa3 | 2013-05-03 11:56:17 +0200 | [diff] [blame] | 1908 | dump_stack(); |
Johannes Berg | d18aa87 | 2012-11-06 16:36:21 +0100 | [diff] [blame] | 1909 | ret = -EIO; |
| 1910 | goto cancel; |
| 1911 | } |
| 1912 | |
Eran Harary | 1094fa2 | 2013-06-02 12:40:34 +0300 | [diff] [blame] | 1913 | if (!(cmd->flags & CMD_SEND_IN_RFKILL) && |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1914 | test_bit(STATUS_RFKILL, &trans->status)) { |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1915 | IWL_DEBUG_RF_KILL(trans, "RFKILL in SYNC CMD... no rsp\n"); |
| 1916 | ret = -ERFKILL; |
| 1917 | goto cancel; |
| 1918 | } |
| 1919 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1920 | if ((cmd->flags & CMD_WANT_SKB) && !cmd->resp_pkt) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1921 | IWL_ERR(trans, "Error: Response NULL in '%s'\n", |
Sharon Dvir | 39bdb17 | 2015-10-15 18:18:09 +0300 | [diff] [blame] | 1922 | iwl_get_cmd_string(trans, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1923 | ret = -EIO; |
| 1924 | goto cancel; |
| 1925 | } |
| 1926 | |
| 1927 | return 0; |
| 1928 | |
| 1929 | cancel: |
| 1930 | if (cmd->flags & CMD_WANT_SKB) { |
| 1931 | /* |
| 1932 | * Cancel the CMD_WANT_SKB flag for the cmd in the |
| 1933 | * TX cmd queue. Otherwise in case the cmd comes |
| 1934 | * in later, it will possibly set an invalid |
| 1935 | * address (cmd->meta.source). |
| 1936 | */ |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1937 | trans_pcie->txq[trans_pcie->cmd_queue]. |
| 1938 | entries[cmd_idx].meta.flags &= ~CMD_WANT_SKB; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1939 | } |
Emmanuel Grumbach | 9cac494 | 2011-11-10 06:55:20 -0800 | [diff] [blame] | 1940 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1941 | if (cmd->resp_pkt) { |
| 1942 | iwl_free_resp(cmd); |
| 1943 | cmd->resp_pkt = NULL; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1944 | } |
| 1945 | |
| 1946 | return ret; |
| 1947 | } |
| 1948 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1949 | int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1950 | { |
Eran Harary | 4f59334 | 2013-05-13 07:53:26 +0300 | [diff] [blame] | 1951 | if (!(cmd->flags & CMD_SEND_IN_RFKILL) && |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1952 | test_bit(STATUS_RFKILL, &trans->status)) { |
Emmanuel Grumbach | 754d7d9 | 2013-03-13 22:16:20 +0200 | [diff] [blame] | 1953 | IWL_DEBUG_RF_KILL(trans, "Dropping CMD 0x%x: RF KILL\n", |
| 1954 | cmd->id); |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1955 | return -ERFKILL; |
Emmanuel Grumbach | 754d7d9 | 2013-03-13 22:16:20 +0200 | [diff] [blame] | 1956 | } |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1957 | |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1958 | if (cmd->flags & CMD_ASYNC) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1959 | return iwl_pcie_send_hcmd_async(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1960 | |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1961 | /* We still can fail on RFKILL that can be asserted while we wait */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1962 | return iwl_pcie_send_hcmd_sync(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1963 | } |
| 1964 | |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 1965 | static int iwl_fill_data_tbs(struct iwl_trans *trans, struct sk_buff *skb, |
| 1966 | struct iwl_txq *txq, u8 hdr_len, |
| 1967 | struct iwl_cmd_meta *out_meta, |
| 1968 | struct iwl_device_cmd *dev_cmd, u16 tb1_len) |
| 1969 | { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 1970 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 1971 | struct iwl_queue *q = &txq->q; |
| 1972 | u16 tb2_len; |
| 1973 | int i; |
| 1974 | |
| 1975 | /* |
| 1976 | * Set up TFD's third entry to point directly to remainder |
| 1977 | * of skb's head, if any |
| 1978 | */ |
| 1979 | tb2_len = skb_headlen(skb) - hdr_len; |
| 1980 | |
| 1981 | if (tb2_len > 0) { |
| 1982 | dma_addr_t tb2_phys = dma_map_single(trans->dev, |
| 1983 | skb->data + hdr_len, |
| 1984 | tb2_len, DMA_TO_DEVICE); |
| 1985 | if (unlikely(dma_mapping_error(trans->dev, tb2_phys))) { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 1986 | iwl_pcie_tfd_unmap(trans, out_meta, txq, q->write_ptr); |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 1987 | return -EINVAL; |
| 1988 | } |
| 1989 | iwl_pcie_txq_build_tfd(trans, txq, tb2_phys, tb2_len, false); |
| 1990 | } |
| 1991 | |
| 1992 | /* set up the remaining entries to point to the data */ |
| 1993 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 1994 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 1995 | dma_addr_t tb_phys; |
| 1996 | int tb_idx; |
| 1997 | |
| 1998 | if (!skb_frag_size(frag)) |
| 1999 | continue; |
| 2000 | |
| 2001 | tb_phys = skb_frag_dma_map(trans->dev, frag, 0, |
| 2002 | skb_frag_size(frag), DMA_TO_DEVICE); |
| 2003 | |
| 2004 | if (unlikely(dma_mapping_error(trans->dev, tb_phys))) { |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 2005 | iwl_pcie_tfd_unmap(trans, out_meta, txq, q->write_ptr); |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 2006 | return -EINVAL; |
| 2007 | } |
| 2008 | tb_idx = iwl_pcie_txq_build_tfd(trans, txq, tb_phys, |
| 2009 | skb_frag_size(frag), false); |
| 2010 | |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 2011 | out_meta->tbs |= BIT(tb_idx); |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 2012 | } |
| 2013 | |
| 2014 | trace_iwlwifi_dev_tx(trans->dev, skb, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 2015 | iwl_pcie_get_tfd(trans_pcie, txq, q->write_ptr), |
| 2016 | trans_pcie->tfd_size, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2017 | &dev_cmd->hdr, IWL_FIRST_TB_SIZE + tb1_len, |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 2018 | skb->data + hdr_len, tb2_len); |
| 2019 | trace_iwlwifi_dev_tx_data(trans->dev, skb, |
| 2020 | hdr_len, skb->len - hdr_len); |
| 2021 | return 0; |
| 2022 | } |
| 2023 | |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2024 | #ifdef CONFIG_INET |
| 2025 | static struct iwl_tso_hdr_page * |
| 2026 | get_page_hdr(struct iwl_trans *trans, size_t len) |
| 2027 | { |
| 2028 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 2029 | struct iwl_tso_hdr_page *p = this_cpu_ptr(trans_pcie->tso_hdr_page); |
| 2030 | |
| 2031 | if (!p->page) |
| 2032 | goto alloc; |
| 2033 | |
| 2034 | /* enough room on this page */ |
| 2035 | if (p->pos + len < (u8 *)page_address(p->page) + PAGE_SIZE) |
| 2036 | return p; |
| 2037 | |
| 2038 | /* We don't have enough room on this page, get a new one. */ |
| 2039 | __free_page(p->page); |
| 2040 | |
| 2041 | alloc: |
| 2042 | p->page = alloc_page(GFP_ATOMIC); |
| 2043 | if (!p->page) |
| 2044 | return NULL; |
| 2045 | p->pos = page_address(p->page); |
| 2046 | return p; |
| 2047 | } |
| 2048 | |
| 2049 | static void iwl_compute_pseudo_hdr_csum(void *iph, struct tcphdr *tcph, |
| 2050 | bool ipv6, unsigned int len) |
| 2051 | { |
| 2052 | if (ipv6) { |
| 2053 | struct ipv6hdr *iphv6 = iph; |
| 2054 | |
| 2055 | tcph->check = ~csum_ipv6_magic(&iphv6->saddr, &iphv6->daddr, |
| 2056 | len + tcph->doff * 4, |
| 2057 | IPPROTO_TCP, 0); |
| 2058 | } else { |
| 2059 | struct iphdr *iphv4 = iph; |
| 2060 | |
| 2061 | ip_send_check(iphv4); |
| 2062 | tcph->check = ~csum_tcpudp_magic(iphv4->saddr, iphv4->daddr, |
| 2063 | len + tcph->doff * 4, |
| 2064 | IPPROTO_TCP, 0); |
| 2065 | } |
| 2066 | } |
| 2067 | |
| 2068 | static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, |
| 2069 | struct iwl_txq *txq, u8 hdr_len, |
| 2070 | struct iwl_cmd_meta *out_meta, |
| 2071 | struct iwl_device_cmd *dev_cmd, u16 tb1_len) |
| 2072 | { |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2073 | struct iwl_trans_pcie *trans_pcie = txq->trans_pcie; |
| 2074 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 2075 | unsigned int snap_ip_tcp_hdrlen, ip_hdrlen, total_len, hdr_room; |
| 2076 | unsigned int mss = skb_shinfo(skb)->gso_size; |
| 2077 | struct iwl_queue *q = &txq->q; |
| 2078 | u16 length, iv_len, amsdu_pad; |
| 2079 | u8 *start_hdr; |
| 2080 | struct iwl_tso_hdr_page *hdr_page; |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 2081 | struct page **page_ptr; |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2082 | int ret; |
| 2083 | struct tso_t tso; |
| 2084 | |
| 2085 | /* if the packet is protected, then it must be CCMP or GCMP */ |
| 2086 | BUILD_BUG_ON(IEEE80211_CCMP_HDR_LEN != IEEE80211_GCMP_HDR_LEN); |
| 2087 | iv_len = ieee80211_has_protected(hdr->frame_control) ? |
| 2088 | IEEE80211_CCMP_HDR_LEN : 0; |
| 2089 | |
| 2090 | trace_iwlwifi_dev_tx(trans->dev, skb, |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 2091 | iwl_pcie_get_tfd(trans_pcie, txq, q->write_ptr), |
| 2092 | trans_pcie->tfd_size, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2093 | &dev_cmd->hdr, IWL_FIRST_TB_SIZE + tb1_len, |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2094 | NULL, 0); |
| 2095 | |
| 2096 | ip_hdrlen = skb_transport_header(skb) - skb_network_header(skb); |
| 2097 | snap_ip_tcp_hdrlen = 8 + ip_hdrlen + tcp_hdrlen(skb); |
| 2098 | total_len = skb->len - snap_ip_tcp_hdrlen - hdr_len - iv_len; |
| 2099 | amsdu_pad = 0; |
| 2100 | |
| 2101 | /* total amount of header we may need for this A-MSDU */ |
| 2102 | hdr_room = DIV_ROUND_UP(total_len, mss) * |
| 2103 | (3 + snap_ip_tcp_hdrlen + sizeof(struct ethhdr)) + iv_len; |
| 2104 | |
| 2105 | /* Our device supports 9 segments at most, it will fit in 1 page */ |
| 2106 | hdr_page = get_page_hdr(trans, hdr_room); |
| 2107 | if (!hdr_page) |
| 2108 | return -ENOMEM; |
| 2109 | |
| 2110 | get_page(hdr_page->page); |
| 2111 | start_hdr = hdr_page->pos; |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 2112 | page_ptr = (void *)((u8 *)skb->cb + trans_pcie->page_offs); |
| 2113 | *page_ptr = hdr_page->page; |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2114 | memcpy(hdr_page->pos, skb->data + hdr_len, iv_len); |
| 2115 | hdr_page->pos += iv_len; |
| 2116 | |
| 2117 | /* |
| 2118 | * Pull the ieee80211 header + IV to be able to use TSO core, |
| 2119 | * we will restore it for the tx_status flow. |
| 2120 | */ |
| 2121 | skb_pull(skb, hdr_len + iv_len); |
| 2122 | |
| 2123 | tso_start(skb, &tso); |
| 2124 | |
| 2125 | while (total_len) { |
| 2126 | /* this is the data left for this subframe */ |
| 2127 | unsigned int data_left = |
| 2128 | min_t(unsigned int, mss, total_len); |
| 2129 | struct sk_buff *csum_skb = NULL; |
| 2130 | unsigned int hdr_tb_len; |
| 2131 | dma_addr_t hdr_tb_phys; |
| 2132 | struct tcphdr *tcph; |
| 2133 | u8 *iph; |
| 2134 | |
| 2135 | total_len -= data_left; |
| 2136 | |
| 2137 | memset(hdr_page->pos, 0, amsdu_pad); |
| 2138 | hdr_page->pos += amsdu_pad; |
| 2139 | amsdu_pad = (4 - (sizeof(struct ethhdr) + snap_ip_tcp_hdrlen + |
| 2140 | data_left)) & 0x3; |
| 2141 | ether_addr_copy(hdr_page->pos, ieee80211_get_DA(hdr)); |
| 2142 | hdr_page->pos += ETH_ALEN; |
| 2143 | ether_addr_copy(hdr_page->pos, ieee80211_get_SA(hdr)); |
| 2144 | hdr_page->pos += ETH_ALEN; |
| 2145 | |
| 2146 | length = snap_ip_tcp_hdrlen + data_left; |
| 2147 | *((__be16 *)hdr_page->pos) = cpu_to_be16(length); |
| 2148 | hdr_page->pos += sizeof(length); |
| 2149 | |
| 2150 | /* |
| 2151 | * This will copy the SNAP as well which will be considered |
| 2152 | * as MAC header. |
| 2153 | */ |
| 2154 | tso_build_hdr(skb, hdr_page->pos, &tso, data_left, !total_len); |
| 2155 | iph = hdr_page->pos + 8; |
| 2156 | tcph = (void *)(iph + ip_hdrlen); |
| 2157 | |
| 2158 | /* For testing on current hardware only */ |
| 2159 | if (trans_pcie->sw_csum_tx) { |
| 2160 | csum_skb = alloc_skb(data_left + tcp_hdrlen(skb), |
| 2161 | GFP_ATOMIC); |
| 2162 | if (!csum_skb) { |
| 2163 | ret = -ENOMEM; |
| 2164 | goto out_unmap; |
| 2165 | } |
| 2166 | |
| 2167 | iwl_compute_pseudo_hdr_csum(iph, tcph, |
| 2168 | skb->protocol == |
| 2169 | htons(ETH_P_IPV6), |
| 2170 | data_left); |
| 2171 | |
| 2172 | memcpy(skb_put(csum_skb, tcp_hdrlen(skb)), |
| 2173 | tcph, tcp_hdrlen(skb)); |
| 2174 | skb_set_transport_header(csum_skb, 0); |
| 2175 | csum_skb->csum_start = |
| 2176 | (unsigned char *)tcp_hdr(csum_skb) - |
| 2177 | csum_skb->head; |
| 2178 | } |
| 2179 | |
| 2180 | hdr_page->pos += snap_ip_tcp_hdrlen; |
| 2181 | |
| 2182 | hdr_tb_len = hdr_page->pos - start_hdr; |
| 2183 | hdr_tb_phys = dma_map_single(trans->dev, start_hdr, |
| 2184 | hdr_tb_len, DMA_TO_DEVICE); |
| 2185 | if (unlikely(dma_mapping_error(trans->dev, hdr_tb_phys))) { |
| 2186 | dev_kfree_skb(csum_skb); |
| 2187 | ret = -EINVAL; |
| 2188 | goto out_unmap; |
| 2189 | } |
| 2190 | iwl_pcie_txq_build_tfd(trans, txq, hdr_tb_phys, |
| 2191 | hdr_tb_len, false); |
| 2192 | trace_iwlwifi_dev_tx_tso_chunk(trans->dev, start_hdr, |
| 2193 | hdr_tb_len); |
| 2194 | |
| 2195 | /* prepare the start_hdr for the next subframe */ |
| 2196 | start_hdr = hdr_page->pos; |
| 2197 | |
| 2198 | /* put the payload */ |
| 2199 | while (data_left) { |
| 2200 | unsigned int size = min_t(unsigned int, tso.size, |
| 2201 | data_left); |
| 2202 | dma_addr_t tb_phys; |
| 2203 | |
| 2204 | if (trans_pcie->sw_csum_tx) |
| 2205 | memcpy(skb_put(csum_skb, size), tso.data, size); |
| 2206 | |
| 2207 | tb_phys = dma_map_single(trans->dev, tso.data, |
| 2208 | size, DMA_TO_DEVICE); |
| 2209 | if (unlikely(dma_mapping_error(trans->dev, tb_phys))) { |
| 2210 | dev_kfree_skb(csum_skb); |
| 2211 | ret = -EINVAL; |
| 2212 | goto out_unmap; |
| 2213 | } |
| 2214 | |
| 2215 | iwl_pcie_txq_build_tfd(trans, txq, tb_phys, |
| 2216 | size, false); |
| 2217 | trace_iwlwifi_dev_tx_tso_chunk(trans->dev, tso.data, |
| 2218 | size); |
| 2219 | |
| 2220 | data_left -= size; |
| 2221 | tso_build_data(skb, &tso, size); |
| 2222 | } |
| 2223 | |
| 2224 | /* For testing on early hardware only */ |
| 2225 | if (trans_pcie->sw_csum_tx) { |
| 2226 | __wsum csum; |
| 2227 | |
| 2228 | csum = skb_checksum(csum_skb, |
| 2229 | skb_checksum_start_offset(csum_skb), |
| 2230 | csum_skb->len - |
| 2231 | skb_checksum_start_offset(csum_skb), |
| 2232 | 0); |
| 2233 | dev_kfree_skb(csum_skb); |
| 2234 | dma_sync_single_for_cpu(trans->dev, hdr_tb_phys, |
| 2235 | hdr_tb_len, DMA_TO_DEVICE); |
| 2236 | tcph->check = csum_fold(csum); |
| 2237 | dma_sync_single_for_device(trans->dev, hdr_tb_phys, |
| 2238 | hdr_tb_len, DMA_TO_DEVICE); |
| 2239 | } |
| 2240 | } |
| 2241 | |
| 2242 | /* re -add the WiFi header and IV */ |
| 2243 | skb_push(skb, hdr_len + iv_len); |
| 2244 | |
| 2245 | return 0; |
| 2246 | |
| 2247 | out_unmap: |
Sara Sharon | 6983ba6 | 2016-06-26 13:17:56 +0300 | [diff] [blame^] | 2248 | iwl_pcie_tfd_unmap(trans, out_meta, txq, q->write_ptr); |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2249 | return ret; |
| 2250 | } |
| 2251 | #else /* CONFIG_INET */ |
| 2252 | static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, |
| 2253 | struct iwl_txq *txq, u8 hdr_len, |
| 2254 | struct iwl_cmd_meta *out_meta, |
| 2255 | struct iwl_device_cmd *dev_cmd, u16 tb1_len) |
| 2256 | { |
| 2257 | /* No A-MSDU without CONFIG_INET */ |
| 2258 | WARN_ON(1); |
| 2259 | |
| 2260 | return -1; |
| 2261 | } |
| 2262 | #endif /* CONFIG_INET */ |
| 2263 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2264 | int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, |
| 2265 | struct iwl_device_cmd *dev_cmd, int txq_id) |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2266 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 2267 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2268 | struct ieee80211_hdr *hdr; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2269 | struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
| 2270 | struct iwl_cmd_meta *out_meta; |
| 2271 | struct iwl_txq *txq; |
| 2272 | struct iwl_queue *q; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2273 | dma_addr_t tb0_phys, tb1_phys, scratch_phys; |
| 2274 | void *tb1_addr; |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 2275 | u16 len, tb1_len; |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 2276 | bool wait_write_ptr; |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2277 | __le16 fc; |
| 2278 | u8 hdr_len; |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 2279 | u16 wifi_seq; |
Sara Sharon | c772a3d3 | 2016-03-13 17:19:38 +0200 | [diff] [blame] | 2280 | bool amsdu; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2281 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2282 | txq = &trans_pcie->txq[txq_id]; |
| 2283 | q = &txq->q; |
Emmanuel Grumbach | 39644e9 | 2011-09-15 11:46:29 -0700 | [diff] [blame] | 2284 | |
Johannes Berg | 961de6a | 2013-07-04 18:00:08 +0200 | [diff] [blame] | 2285 | if (WARN_ONCE(!test_bit(txq_id, trans_pcie->queue_used), |
| 2286 | "TX on unused queue %d\n", txq_id)) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2287 | return -EINVAL; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2288 | |
Emmanuel Grumbach | 41837ca9 | 2015-10-21 09:00:07 +0300 | [diff] [blame] | 2289 | if (unlikely(trans_pcie->sw_csum_tx && |
| 2290 | skb->ip_summed == CHECKSUM_PARTIAL)) { |
| 2291 | int offs = skb_checksum_start_offset(skb); |
| 2292 | int csum_offs = offs + skb->csum_offset; |
| 2293 | __wsum csum; |
| 2294 | |
| 2295 | if (skb_ensure_writable(skb, csum_offs + sizeof(__sum16))) |
| 2296 | return -1; |
| 2297 | |
| 2298 | csum = skb_checksum(skb, offs, skb->len - offs, 0); |
| 2299 | *(__sum16 *)(skb->data + csum_offs) = csum_fold(csum); |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 2300 | |
| 2301 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Emmanuel Grumbach | 41837ca9 | 2015-10-21 09:00:07 +0300 | [diff] [blame] | 2302 | } |
| 2303 | |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2304 | if (skb_is_nonlinear(skb) && |
Sara Sharon | 3cd1980 | 2016-06-23 16:31:40 +0300 | [diff] [blame] | 2305 | skb_shinfo(skb)->nr_frags > IWL_PCIE_MAX_FRAGS(trans_pcie) && |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2306 | __skb_linearize(skb)) |
| 2307 | return -ENOMEM; |
| 2308 | |
| 2309 | /* mac80211 always puts the full header into the SKB's head, |
| 2310 | * so there's no need to check if it's readable there |
| 2311 | */ |
| 2312 | hdr = (struct ieee80211_hdr *)skb->data; |
| 2313 | fc = hdr->frame_control; |
| 2314 | hdr_len = ieee80211_hdrlen(fc); |
| 2315 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2316 | spin_lock(&txq->lock); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2317 | |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 2318 | if (iwl_queue_space(q) < q->high_mark) { |
| 2319 | iwl_stop_queue(trans, txq); |
| 2320 | |
| 2321 | /* don't put the packet on the ring, if there is no room */ |
| 2322 | if (unlikely(iwl_queue_space(q) < 3)) { |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 2323 | struct iwl_device_cmd **dev_cmd_ptr; |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 2324 | |
Johannes Berg | 21cb322 | 2016-06-21 13:11:48 +0200 | [diff] [blame] | 2325 | dev_cmd_ptr = (void *)((u8 *)skb->cb + |
| 2326 | trans_pcie->dev_cmd_offs); |
| 2327 | |
| 2328 | *dev_cmd_ptr = dev_cmd; |
Emmanuel Grumbach | 3955525 | 2016-01-14 09:39:21 +0200 | [diff] [blame] | 2329 | __skb_queue_tail(&txq->overflow_q, skb); |
| 2330 | |
| 2331 | spin_unlock(&txq->lock); |
| 2332 | return 0; |
| 2333 | } |
| 2334 | } |
| 2335 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2336 | /* In AGG mode, the index in the ring must correspond to the WiFi |
| 2337 | * sequence number. This is a HW requirements to help the SCD to parse |
| 2338 | * the BA. |
| 2339 | * Check here that the packets are in the right place on the ring. |
| 2340 | */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 2341 | wifi_seq = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); |
Eliad Peller | 1092b9b | 2013-07-16 17:53:43 +0300 | [diff] [blame] | 2342 | WARN_ONCE(txq->ampdu && |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 2343 | (wifi_seq & 0xff) != q->write_ptr, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2344 | "Q: %d WiFi Seq %d tfdNum %d", |
| 2345 | txq_id, wifi_seq, q->write_ptr); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2346 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2347 | /* Set up driver data for this TFD */ |
| 2348 | txq->entries[q->write_ptr].skb = skb; |
| 2349 | txq->entries[q->write_ptr].cmd = dev_cmd; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2350 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2351 | dev_cmd->hdr.sequence = |
| 2352 | cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | |
| 2353 | INDEX_TO_SEQ(q->write_ptr))); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2354 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2355 | tb0_phys = iwl_pcie_get_first_tb_dma(txq, q->write_ptr); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2356 | scratch_phys = tb0_phys + sizeof(struct iwl_cmd_header) + |
| 2357 | offsetof(struct iwl_tx_cmd, scratch); |
| 2358 | |
| 2359 | tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); |
| 2360 | tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); |
| 2361 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2362 | /* Set up first empty entry in queue's array of Tx/cmd buffers */ |
| 2363 | out_meta = &txq->entries[q->write_ptr].meta; |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2364 | out_meta->flags = 0; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2365 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2366 | /* |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2367 | * The second TB (tb1) points to the remainder of the TX command |
| 2368 | * and the 802.11 header - dword aligned size |
| 2369 | * (This calculation modifies the TX command, so do it before the |
| 2370 | * setup of the first TB) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2371 | */ |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2372 | len = sizeof(struct iwl_tx_cmd) + sizeof(struct iwl_cmd_header) + |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2373 | hdr_len - IWL_FIRST_TB_SIZE; |
Sara Sharon | c772a3d3 | 2016-03-13 17:19:38 +0200 | [diff] [blame] | 2374 | /* do not align A-MSDU to dword as the subframe header aligns it */ |
| 2375 | amsdu = ieee80211_is_data_qos(fc) && |
| 2376 | (*ieee80211_get_qos_ctl(hdr) & |
| 2377 | IEEE80211_QOS_CTL_A_MSDU_PRESENT); |
| 2378 | if (trans_pcie->sw_csum_tx || !amsdu) { |
| 2379 | tb1_len = ALIGN(len, 4); |
| 2380 | /* Tell NIC about any 2-byte padding after MAC header */ |
| 2381 | if (tb1_len != len) |
| 2382 | tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; |
| 2383 | } else { |
| 2384 | tb1_len = len; |
| 2385 | } |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2386 | |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2387 | /* The first TB points to bi-directional DMA data */ |
| 2388 | memcpy(&txq->first_tb_bufs[q->write_ptr], &dev_cmd->hdr, |
| 2389 | IWL_FIRST_TB_SIZE); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2390 | iwl_pcie_txq_build_tfd(trans, txq, tb0_phys, |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2391 | IWL_FIRST_TB_SIZE, true); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2392 | |
| 2393 | /* there must be data left over for TB1 or this code must be changed */ |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2394 | BUILD_BUG_ON(sizeof(struct iwl_tx_cmd) < IWL_FIRST_TB_SIZE); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2395 | |
| 2396 | /* map the data for TB1 */ |
Sara Sharon | 8de437c | 2016-06-09 17:56:38 +0300 | [diff] [blame] | 2397 | tb1_addr = ((u8 *)&dev_cmd->hdr) + IWL_FIRST_TB_SIZE; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2398 | tb1_phys = dma_map_single(trans->dev, tb1_addr, tb1_len, DMA_TO_DEVICE); |
| 2399 | if (unlikely(dma_mapping_error(trans->dev, tb1_phys))) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2400 | goto out_err; |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 2401 | iwl_pcie_txq_build_tfd(trans, txq, tb1_phys, tb1_len, false); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2402 | |
Sara Sharon | c772a3d3 | 2016-03-13 17:19:38 +0200 | [diff] [blame] | 2403 | if (amsdu) { |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2404 | if (unlikely(iwl_fill_data_tbs_amsdu(trans, skb, txq, hdr_len, |
| 2405 | out_meta, dev_cmd, |
| 2406 | tb1_len))) |
| 2407 | goto out_err; |
| 2408 | } else if (unlikely(iwl_fill_data_tbs(trans, skb, txq, hdr_len, |
| 2409 | out_meta, dev_cmd, tb1_len))) { |
Emmanuel Grumbach | 3a0b2a4 | 2015-10-14 22:10:50 +0300 | [diff] [blame] | 2410 | goto out_err; |
Emmanuel Grumbach | 6eb5e529 | 2015-10-18 09:31:24 +0300 | [diff] [blame] | 2411 | } |
Johannes Berg | 206eea7 | 2015-04-17 16:38:31 +0200 | [diff] [blame] | 2412 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 2413 | /* Set up entry for this TFD in Tx byte-count array */ |
| 2414 | iwl_pcie_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len)); |
| 2415 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 2416 | wait_write_ptr = ieee80211_has_morefrags(fc); |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 2417 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2418 | /* start timer if queue currently empty */ |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 2419 | if (q->read_ptr == q->write_ptr) { |
Emmanuel Grumbach | aecdc63 | 2015-07-29 23:06:41 +0300 | [diff] [blame] | 2420 | if (txq->wd_timeout) { |
| 2421 | /* |
| 2422 | * If the TXQ is active, then set the timer, if not, |
| 2423 | * set the timer in remainder so that the timer will |
| 2424 | * be armed with the right value when the station will |
| 2425 | * wake up. |
| 2426 | */ |
| 2427 | if (!txq->frozen) |
| 2428 | mod_timer(&txq->stuck_timer, |
| 2429 | jiffies + txq->wd_timeout); |
| 2430 | else |
| 2431 | txq->frozen_expiry_remainder = txq->wd_timeout; |
| 2432 | } |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 2433 | IWL_DEBUG_RPM(trans, "Q: %d first tx - take ref\n", q->id); |
Luca Coelho | c24c7f5 | 2016-03-30 20:59:27 +0300 | [diff] [blame] | 2434 | iwl_trans_ref(trans); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 2435 | } |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2436 | |
| 2437 | /* Tell device the write index *just past* this latest filled TFD */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 2438 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 2439 | if (!wait_write_ptr) |
| 2440 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2441 | |
| 2442 | /* |
| 2443 | * At this point the frame is "transmitted" successfully |
Johannes Berg | 43aa616 | 2014-02-27 14:24:36 +0100 | [diff] [blame] | 2444 | * and we will get a TX status notification eventually. |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2445 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 2446 | spin_unlock(&txq->lock); |
| 2447 | return 0; |
| 2448 | out_err: |
| 2449 | spin_unlock(&txq->lock); |
| 2450 | return -1; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 2451 | } |