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. |
Johannes Berg | 8b4139d | 2014-07-24 14:05:26 +0200 | [diff] [blame] | 4 | * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 5 | * |
| 6 | * Portions of this file are derived from the ipw3945 project, as well |
| 7 | * as portions of the ieee80211 subsystem header files. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of version 2 of the GNU General Public License as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 16 | * more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along with |
| 19 | * this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 21 | * |
| 22 | * The full GNU General Public License is included in this distribution in the |
| 23 | * file called LICENSE. |
| 24 | * |
| 25 | * Contact Information: |
Winkler, Tomas | 759ef89 | 2008-12-09 11:28:58 -0800 | [diff] [blame] | 26 | * Intel Linux Wireless <ilw@linux.intel.com> |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 27 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 28 | * |
| 29 | *****************************************************************************/ |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 30 | #include <linux/etherdevice.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 32 | #include <linux/sched.h> |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 33 | |
Emmanuel Grumbach | 522376d | 2011-09-06 09:31:19 -0700 | [diff] [blame] | 34 | #include "iwl-debug.h" |
| 35 | #include "iwl-csr.h" |
| 36 | #include "iwl-prph.h" |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 37 | #include "iwl-io.h" |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 38 | #include "iwl-scd.h" |
Emmanuel Grumbach | ed277c9 | 2012-02-09 16:08:15 +0200 | [diff] [blame] | 39 | #include "iwl-op-mode.h" |
Johannes Berg | 6468a01 | 2012-05-16 19:13:54 +0200 | [diff] [blame] | 40 | #include "internal.h" |
Johannes Berg | 6238b00 | 2012-04-02 15:04:33 +0200 | [diff] [blame] | 41 | /* 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] | 42 | #include "dvm/commands.h" |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 43 | |
Emmanuel Grumbach | 522376d | 2011-09-06 09:31:19 -0700 | [diff] [blame] | 44 | #define IWL_TX_CRC_SIZE 4 |
| 45 | #define IWL_TX_DELIMITER_SIZE 4 |
| 46 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 47 | /*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** |
| 48 | * DMA services |
| 49 | * |
| 50 | * Theory of operation |
| 51 | * |
| 52 | * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer |
| 53 | * of buffer descriptors, each of which points to one or more data buffers for |
| 54 | * the device to read from or fill. Driver and device exchange status of each |
| 55 | * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty |
| 56 | * entries in each circular buffer, to protect against confusing empty and full |
| 57 | * queue states. |
| 58 | * |
| 59 | * The device reads or writes the data in the queues via the device's several |
| 60 | * DMA/FIFO channels. Each queue is mapped to a single DMA channel. |
| 61 | * |
| 62 | * For Tx queue, there are low mark and high mark limits. If, after queuing |
| 63 | * the packet for Tx, free space become < low mark, Tx queue stopped. When |
| 64 | * reclaiming packets (on 'tx done IRQ), if free space become > high mark, |
| 65 | * Tx queue resumed. |
| 66 | * |
| 67 | ***************************************************/ |
| 68 | static int iwl_queue_space(const struct iwl_queue *q) |
| 69 | { |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 70 | unsigned int max; |
| 71 | unsigned int used; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 72 | |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 73 | /* |
| 74 | * To avoid ambiguity between empty and completely full queues, there |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 75 | * should always be less than TFD_QUEUE_SIZE_MAX elements in the queue. |
| 76 | * If q->n_window is smaller than TFD_QUEUE_SIZE_MAX, there is no need |
| 77 | * to reserve any queue entries for this purpose. |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 78 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 79 | if (q->n_window < TFD_QUEUE_SIZE_MAX) |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 80 | max = q->n_window; |
| 81 | else |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 82 | max = TFD_QUEUE_SIZE_MAX - 1; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 83 | |
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 | * TFD_QUEUE_SIZE_MAX is a power of 2, so the following is equivalent to |
| 86 | * modulo by TFD_QUEUE_SIZE_MAX and is well defined. |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 87 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 88 | used = (q->write_ptr - q->read_ptr) & (TFD_QUEUE_SIZE_MAX - 1); |
Ido Yariv | a9b2924 | 2013-07-15 11:51:48 -0400 | [diff] [blame] | 89 | |
| 90 | if (WARN_ON(used > max)) |
| 91 | return 0; |
| 92 | |
| 93 | return max - used; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /* |
| 97 | * iwl_queue_init - Initialize queue's high/low-water and read/write indexes |
| 98 | */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 99 | 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] | 100 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 101 | q->n_window = slots_num; |
| 102 | q->id = id; |
| 103 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 104 | /* slots_num must be power-of-two size, otherwise |
| 105 | * get_cmd_index is broken. */ |
| 106 | if (WARN_ON(!is_power_of_2(slots_num))) |
| 107 | return -EINVAL; |
| 108 | |
| 109 | q->low_mark = q->n_window / 4; |
| 110 | if (q->low_mark < 4) |
| 111 | q->low_mark = 4; |
| 112 | |
| 113 | q->high_mark = q->n_window / 8; |
| 114 | if (q->high_mark < 2) |
| 115 | q->high_mark = 2; |
| 116 | |
| 117 | q->write_ptr = 0; |
| 118 | q->read_ptr = 0; |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 123 | static int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans, |
| 124 | struct iwl_dma_ptr *ptr, size_t size) |
| 125 | { |
| 126 | if (WARN_ON(ptr->addr)) |
| 127 | return -EINVAL; |
| 128 | |
| 129 | ptr->addr = dma_alloc_coherent(trans->dev, size, |
| 130 | &ptr->dma, GFP_KERNEL); |
| 131 | if (!ptr->addr) |
| 132 | return -ENOMEM; |
| 133 | ptr->size = size; |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | static void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, |
| 138 | struct iwl_dma_ptr *ptr) |
| 139 | { |
| 140 | if (unlikely(!ptr->addr)) |
| 141 | return; |
| 142 | |
| 143 | dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma); |
| 144 | memset(ptr, 0, sizeof(*ptr)); |
| 145 | } |
| 146 | |
| 147 | static void iwl_pcie_txq_stuck_timer(unsigned long data) |
| 148 | { |
| 149 | struct iwl_txq *txq = (void *)data; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 150 | struct iwl_trans_pcie *trans_pcie = txq->trans_pcie; |
| 151 | struct iwl_trans *trans = iwl_trans_pcie_get_trans(trans_pcie); |
| 152 | u32 scd_sram_addr = trans_pcie->scd_base_addr + |
| 153 | SCD_TX_STTS_QUEUE_OFFSET(txq->q.id); |
| 154 | u8 buf[16]; |
| 155 | int i; |
| 156 | |
| 157 | spin_lock(&txq->lock); |
| 158 | /* check if triggered erroneously */ |
| 159 | if (txq->q.read_ptr == txq->q.write_ptr) { |
| 160 | spin_unlock(&txq->lock); |
| 161 | return; |
| 162 | } |
| 163 | spin_unlock(&txq->lock); |
| 164 | |
| 165 | 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] | 166 | jiffies_to_msecs(txq->wd_timeout)); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 167 | IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n", |
| 168 | txq->q.read_ptr, txq->q.write_ptr); |
| 169 | |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 170 | iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf)); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 171 | |
| 172 | iwl_print_hex_error(trans, buf, sizeof(buf)); |
| 173 | |
| 174 | for (i = 0; i < FH_TCSR_CHNL_NUM; i++) |
| 175 | IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", i, |
| 176 | iwl_read_direct32(trans, FH_TX_TRB_REG(i))); |
| 177 | |
| 178 | for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) { |
| 179 | u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(i)); |
| 180 | u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7; |
| 181 | bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE)); |
| 182 | u32 tbl_dw = |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 183 | iwl_trans_read_mem32(trans, |
| 184 | trans_pcie->scd_base_addr + |
| 185 | SCD_TRANS_TBL_OFFSET_QUEUE(i)); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 186 | |
| 187 | if (i & 0x1) |
| 188 | tbl_dw = (tbl_dw & 0xFFFF0000) >> 16; |
| 189 | else |
| 190 | tbl_dw = tbl_dw & 0x0000FFFF; |
| 191 | |
| 192 | IWL_ERR(trans, |
| 193 | "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n", |
| 194 | i, active ? "" : "in", fifo, tbl_dw, |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 195 | iwl_read_prph(trans, SCD_QUEUE_RDPTR(i)) & |
| 196 | (TFD_QUEUE_SIZE_MAX - 1), |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 197 | iwl_read_prph(trans, SCD_QUEUE_WRPTR(i))); |
| 198 | } |
| 199 | |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 200 | iwl_force_nmi(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 201 | } |
| 202 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 203 | /* |
| 204 | * 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] | 205 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 206 | static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans, |
| 207 | struct iwl_txq *txq, u16 byte_cnt) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 208 | { |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 209 | struct iwlagn_scd_bc_tbl *scd_bc_tbl; |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 210 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 211 | int write_ptr = txq->q.write_ptr; |
| 212 | int txq_id = txq->q.id; |
| 213 | u8 sec_ctl = 0; |
| 214 | u8 sta_id = 0; |
| 215 | u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; |
| 216 | __le16 bc_ent; |
Emmanuel Grumbach | 132f98c | 2011-09-20 15:37:24 -0700 | [diff] [blame] | 217 | struct iwl_tx_cmd *tx_cmd = |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 218 | (void *) txq->entries[txq->q.write_ptr].cmd->payload; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 219 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 220 | scd_bc_tbl = trans_pcie->scd_bc_tbls.addr; |
| 221 | |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 222 | WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX); |
| 223 | |
Emmanuel Grumbach | 132f98c | 2011-09-20 15:37:24 -0700 | [diff] [blame] | 224 | sta_id = tx_cmd->sta_id; |
| 225 | sec_ctl = tx_cmd->sec_ctl; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 226 | |
| 227 | switch (sec_ctl & TX_CMD_SEC_MSK) { |
| 228 | case TX_CMD_SEC_CCM: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 229 | len += IEEE80211_CCMP_MIC_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 230 | break; |
| 231 | case TX_CMD_SEC_TKIP: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 232 | len += IEEE80211_TKIP_ICV_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 233 | break; |
| 234 | case TX_CMD_SEC_WEP: |
Johannes Berg | 4325f6c | 2013-05-08 13:09:08 +0200 | [diff] [blame] | 235 | len += IEEE80211_WEP_IV_LEN + IEEE80211_WEP_ICV_LEN; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 236 | break; |
| 237 | } |
| 238 | |
Emmanuel Grumbach | 046db34 | 2012-12-05 15:07:54 +0200 | [diff] [blame] | 239 | if (trans_pcie->bc_table_dword) |
| 240 | len = DIV_ROUND_UP(len, 4); |
| 241 | |
| 242 | bc_ent = cpu_to_le16(len | (sta_id << 12)); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 243 | |
| 244 | scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent; |
| 245 | |
| 246 | if (write_ptr < TFD_QUEUE_SIZE_BC_DUP) |
| 247 | scd_bc_tbl[txq_id]. |
| 248 | tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent; |
| 249 | } |
| 250 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 251 | static void iwl_pcie_txq_inval_byte_cnt_tbl(struct iwl_trans *trans, |
| 252 | struct iwl_txq *txq) |
| 253 | { |
| 254 | struct iwl_trans_pcie *trans_pcie = |
| 255 | IWL_TRANS_GET_PCIE_TRANS(trans); |
| 256 | struct iwlagn_scd_bc_tbl *scd_bc_tbl = trans_pcie->scd_bc_tbls.addr; |
| 257 | int txq_id = txq->q.id; |
| 258 | int read_ptr = txq->q.read_ptr; |
| 259 | u8 sta_id = 0; |
| 260 | __le16 bc_ent; |
| 261 | struct iwl_tx_cmd *tx_cmd = |
| 262 | (void *)txq->entries[txq->q.read_ptr].cmd->payload; |
| 263 | |
| 264 | WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX); |
| 265 | |
| 266 | if (txq_id != trans_pcie->cmd_queue) |
| 267 | sta_id = tx_cmd->sta_id; |
| 268 | |
| 269 | bc_ent = cpu_to_le16(1 | (sta_id << 12)); |
| 270 | scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent; |
| 271 | |
| 272 | if (read_ptr < TFD_QUEUE_SIZE_BC_DUP) |
| 273 | scd_bc_tbl[txq_id]. |
| 274 | tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] = bc_ent; |
| 275 | } |
| 276 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 277 | /* |
| 278 | * iwl_pcie_txq_inc_wr_ptr - Send new write index to hardware |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 279 | */ |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 280 | static void iwl_pcie_txq_inc_wr_ptr(struct iwl_trans *trans, |
| 281 | struct iwl_txq *txq) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 282 | { |
Emmanuel Grumbach | 23e76d1 | 2014-01-20 09:50:29 +0200 | [diff] [blame] | 283 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 284 | u32 reg = 0; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 285 | int txq_id = txq->q.id; |
| 286 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 287 | lockdep_assert_held(&txq->lock); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 288 | |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 289 | /* |
| 290 | * explicitly wake up the NIC if: |
| 291 | * 1. shadow registers aren't enabled |
| 292 | * 2. NIC is woken up for CMD regardless of shadow outside this function |
| 293 | * 3. there is a chance that the NIC is asleep |
| 294 | */ |
| 295 | if (!trans->cfg->base_params->shadow_reg_enable && |
| 296 | txq_id != trans_pcie->cmd_queue && |
| 297 | test_bit(STATUS_TPOWER_PMI, &trans->status)) { |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 298 | /* |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 299 | * wake up nic if it's powered down ... |
| 300 | * uCode will wake up, and interrupt us again, so next |
| 301 | * time we'll skip this part. |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 302 | */ |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 303 | reg = iwl_read32(trans, CSR_UCODE_DRV_GP1); |
| 304 | |
| 305 | if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { |
| 306 | IWL_DEBUG_INFO(trans, "Tx queue %d requesting wakeup, GP1 = 0x%x\n", |
| 307 | txq_id, reg); |
| 308 | iwl_set_bit(trans, CSR_GP_CNTRL, |
| 309 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 310 | txq->need_update = true; |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 311 | return; |
| 312 | } |
Wey-Yi Guy | f81c1f4 | 2010-11-10 09:56:50 -0800 | [diff] [blame] | 313 | } |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 314 | |
| 315 | /* |
| 316 | * if not in power-save mode, uCode will never sleep when we're |
| 317 | * trying to tx (during RFKILL, we're not trying to tx). |
| 318 | */ |
| 319 | IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq_id, txq->q.write_ptr); |
| 320 | iwl_write32(trans, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8)); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 321 | } |
Eliad Peller | 5045388 | 2014-02-05 19:12:24 +0200 | [diff] [blame] | 322 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 323 | void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans) |
| 324 | { |
| 325 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 326 | int i; |
| 327 | |
| 328 | for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) { |
| 329 | struct iwl_txq *txq = &trans_pcie->txq[i]; |
| 330 | |
Emmanuel Grumbach | d090f87 | 2014-05-13 08:10:51 +0300 | [diff] [blame] | 331 | spin_lock_bh(&txq->lock); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 332 | if (trans_pcie->txq[i].need_update) { |
| 333 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
| 334 | trans_pcie->txq[i].need_update = false; |
| 335 | } |
Emmanuel Grumbach | d090f87 | 2014-05-13 08:10:51 +0300 | [diff] [blame] | 336 | spin_unlock_bh(&txq->lock); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 337 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 338 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 339 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 340 | static inline dma_addr_t iwl_pcie_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 341 | { |
| 342 | struct iwl_tfd_tb *tb = &tfd->tbs[idx]; |
| 343 | |
| 344 | dma_addr_t addr = get_unaligned_le32(&tb->lo); |
| 345 | if (sizeof(dma_addr_t) > sizeof(u32)) |
| 346 | addr |= |
| 347 | ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16; |
| 348 | |
| 349 | return addr; |
| 350 | } |
| 351 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 352 | static inline void iwl_pcie_tfd_set_tb(struct iwl_tfd *tfd, u8 idx, |
| 353 | dma_addr_t addr, u16 len) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 354 | { |
| 355 | struct iwl_tfd_tb *tb = &tfd->tbs[idx]; |
| 356 | u16 hi_n_len = len << 4; |
| 357 | |
| 358 | put_unaligned_le32(addr, &tb->lo); |
| 359 | if (sizeof(dma_addr_t) > sizeof(u32)) |
| 360 | hi_n_len |= ((addr >> 16) >> 16) & 0xF; |
| 361 | |
| 362 | tb->hi_n_len = cpu_to_le16(hi_n_len); |
| 363 | |
| 364 | tfd->num_tbs = idx + 1; |
| 365 | } |
| 366 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 367 | static inline u8 iwl_pcie_tfd_get_num_tbs(struct iwl_tfd *tfd) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 368 | { |
| 369 | return tfd->num_tbs & 0x1f; |
| 370 | } |
| 371 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 372 | static void iwl_pcie_tfd_unmap(struct iwl_trans *trans, |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 373 | struct iwl_cmd_meta *meta, |
| 374 | struct iwl_tfd *tfd) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 375 | { |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 376 | int i; |
| 377 | int num_tbs; |
| 378 | |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 379 | /* Sanity check on number of chunks */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 380 | num_tbs = iwl_pcie_tfd_get_num_tbs(tfd); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 381 | |
| 382 | if (num_tbs >= IWL_NUM_OF_TBS) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 383 | IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 384 | /* @todo issue fatal error, it is quite serious situation */ |
| 385 | return; |
| 386 | } |
| 387 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 388 | /* first TB is never freed - it's the scratchbuf data */ |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 389 | |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 390 | for (i = 1; i < num_tbs; i++) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 391 | dma_unmap_single(trans->dev, iwl_pcie_tfd_tb_get_addr(tfd, i), |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 392 | iwl_pcie_tfd_tb_get_len(tfd, i), |
| 393 | DMA_TO_DEVICE); |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 394 | |
| 395 | tfd->num_tbs = 0; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 396 | } |
| 397 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 398 | /* |
| 399 | * 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] | 400 | * @trans - transport private data |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 401 | * @txq - tx queue |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 402 | * @dma_dir - the direction of the DMA mapping |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 403 | * |
| 404 | * Does NOT advance any TFD circular buffer read/write indexes |
| 405 | * Does NOT free the TFD itself (which is within circular buffer) |
| 406 | */ |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 407 | 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] | 408 | { |
| 409 | struct iwl_tfd *tfd_tmp = txq->tfds; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 410 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 411 | /* rd_ptr is bounded by TFD_QUEUE_SIZE_MAX and |
| 412 | * idx is bounded by n_window |
| 413 | */ |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 414 | int rd_ptr = txq->q.read_ptr; |
| 415 | int idx = get_cmd_index(&txq->q, rd_ptr); |
| 416 | |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 417 | lockdep_assert_held(&txq->lock); |
| 418 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 419 | /* We have only q->n_window txq->entries, but we use |
| 420 | * TFD_QUEUE_SIZE_MAX tfds |
| 421 | */ |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 422 | iwl_pcie_tfd_unmap(trans, &txq->entries[idx].meta, &tfd_tmp[rd_ptr]); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 423 | |
| 424 | /* free SKB */ |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 425 | if (txq->entries) { |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 426 | struct sk_buff *skb; |
| 427 | |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 428 | skb = txq->entries[idx].skb; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 429 | |
Emmanuel Grumbach | 909e9b2 | 2011-09-15 11:46:30 -0700 | [diff] [blame] | 430 | /* Can be called from irqs-disabled context |
| 431 | * If skb is not NULL, it means that the whole queue is being |
| 432 | * freed and that the queue is not empty - free the skb |
| 433 | */ |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 434 | if (skb) { |
Emmanuel Grumbach | ed277c9 | 2012-02-09 16:08:15 +0200 | [diff] [blame] | 435 | iwl_op_mode_free_skb(trans->op_mode, skb); |
Emmanuel Grumbach | ebed633 | 2012-05-16 22:35:58 +0200 | [diff] [blame] | 436 | txq->entries[idx].skb = NULL; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 437 | } |
| 438 | } |
| 439 | } |
| 440 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 441 | 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] | 442 | dma_addr_t addr, u16 len, bool reset) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 443 | { |
| 444 | struct iwl_queue *q; |
| 445 | struct iwl_tfd *tfd, *tfd_tmp; |
| 446 | u32 num_tbs; |
| 447 | |
| 448 | q = &txq->q; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 449 | tfd_tmp = txq->tfds; |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 450 | tfd = &tfd_tmp[q->write_ptr]; |
| 451 | |
| 452 | if (reset) |
| 453 | memset(tfd, 0, sizeof(*tfd)); |
| 454 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 455 | num_tbs = iwl_pcie_tfd_get_num_tbs(tfd); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 456 | |
| 457 | /* Each TFD can point to a maximum 20 Tx buffers */ |
| 458 | if (num_tbs >= IWL_NUM_OF_TBS) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 459 | IWL_ERR(trans, "Error can not send more than %d chunks\n", |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 460 | IWL_NUM_OF_TBS); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 461 | return -EINVAL; |
| 462 | } |
| 463 | |
Eliad Peller | 1092b9b | 2013-07-16 17:53:43 +0300 | [diff] [blame] | 464 | if (WARN(addr & ~IWL_TX_DMA_MASK, |
| 465 | "Unaligned address = %llx\n", (unsigned long long)addr)) |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 466 | return -EINVAL; |
| 467 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 468 | iwl_pcie_tfd_set_tb(tfd, num_tbs, addr, len); |
Johannes Berg | 214d14d | 2011-05-04 07:50:44 -0700 | [diff] [blame] | 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 473 | static int iwl_pcie_txq_alloc(struct iwl_trans *trans, |
| 474 | struct iwl_txq *txq, int slots_num, |
| 475 | u32 txq_id) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 476 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 477 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 478 | size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 479 | size_t scratchbuf_sz; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 480 | int i; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 481 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 482 | if (WARN_ON(txq->entries || txq->tfds)) |
| 483 | return -EINVAL; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 484 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 485 | setup_timer(&txq->stuck_timer, iwl_pcie_txq_stuck_timer, |
| 486 | (unsigned long)txq); |
| 487 | txq->trans_pcie = trans_pcie; |
| 488 | |
| 489 | txq->q.n_window = slots_num; |
| 490 | |
| 491 | txq->entries = kcalloc(slots_num, |
| 492 | sizeof(struct iwl_pcie_txq_entry), |
| 493 | GFP_KERNEL); |
| 494 | |
| 495 | if (!txq->entries) |
| 496 | goto error; |
| 497 | |
| 498 | if (txq_id == trans_pcie->cmd_queue) |
| 499 | for (i = 0; i < slots_num; i++) { |
| 500 | txq->entries[i].cmd = |
| 501 | kmalloc(sizeof(struct iwl_device_cmd), |
| 502 | GFP_KERNEL); |
| 503 | if (!txq->entries[i].cmd) |
| 504 | goto error; |
| 505 | } |
| 506 | |
| 507 | /* Circular buffer of transmit frame descriptors (TFDs), |
| 508 | * shared with device */ |
| 509 | txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz, |
| 510 | &txq->q.dma_addr, GFP_KERNEL); |
Joe Perches | d0320f7 | 2013-03-14 13:07:21 +0000 | [diff] [blame] | 511 | if (!txq->tfds) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 512 | goto error; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 513 | |
| 514 | BUILD_BUG_ON(IWL_HCMD_SCRATCHBUF_SIZE != sizeof(*txq->scratchbufs)); |
| 515 | BUILD_BUG_ON(offsetof(struct iwl_pcie_txq_scratch_buf, scratch) != |
| 516 | sizeof(struct iwl_cmd_header) + |
| 517 | offsetof(struct iwl_tx_cmd, scratch)); |
| 518 | |
| 519 | scratchbuf_sz = sizeof(*txq->scratchbufs) * slots_num; |
| 520 | |
| 521 | txq->scratchbufs = dma_alloc_coherent(trans->dev, scratchbuf_sz, |
| 522 | &txq->scratchbufs_dma, |
| 523 | GFP_KERNEL); |
| 524 | if (!txq->scratchbufs) |
| 525 | goto err_free_tfds; |
| 526 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 527 | txq->q.id = txq_id; |
| 528 | |
| 529 | return 0; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 530 | err_free_tfds: |
| 531 | 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] | 532 | error: |
| 533 | if (txq->entries && txq_id == trans_pcie->cmd_queue) |
| 534 | for (i = 0; i < slots_num; i++) |
| 535 | kfree(txq->entries[i].cmd); |
| 536 | kfree(txq->entries); |
| 537 | txq->entries = NULL; |
| 538 | |
| 539 | return -ENOMEM; |
| 540 | |
| 541 | } |
| 542 | |
| 543 | static int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, |
| 544 | int slots_num, u32 txq_id) |
| 545 | { |
| 546 | int ret; |
| 547 | |
Johannes Berg | 43aa616 | 2014-02-27 14:24:36 +0100 | [diff] [blame] | 548 | txq->need_update = false; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 549 | |
| 550 | /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise |
| 551 | * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ |
| 552 | BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); |
| 553 | |
| 554 | /* Initialize queue's high/low-water marks, and head/tail indexes */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 555 | ret = iwl_queue_init(&txq->q, slots_num, txq_id); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 556 | if (ret) |
| 557 | return ret; |
| 558 | |
| 559 | spin_lock_init(&txq->lock); |
| 560 | |
| 561 | /* |
| 562 | * Tell nic where to find circular buffer of Tx Frame Descriptors for |
| 563 | * given Tx queue, and enable the DMA channel used for that queue. |
| 564 | * Circular buffer (TFD queue in DRAM) physical base address */ |
| 565 | iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id), |
| 566 | txq->q.dma_addr >> 8); |
| 567 | |
| 568 | return 0; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 569 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 570 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 571 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 572 | * 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] | 573 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 574 | 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] | 575 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 576 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 577 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 578 | struct iwl_queue *q = &txq->q; |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 579 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 580 | spin_lock_bh(&txq->lock); |
| 581 | while (q->write_ptr != q->read_ptr) { |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 582 | IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n", |
| 583 | txq_id, q->read_ptr); |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 584 | iwl_pcie_txq_free_tfd(trans, txq); |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 585 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 586 | } |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 587 | txq->active = false; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 588 | spin_unlock_bh(&txq->lock); |
Emmanuel Grumbach | 8a487b1 | 2013-06-13 13:10:00 +0300 | [diff] [blame] | 589 | |
| 590 | /* just in case - this queue may have been stopped */ |
| 591 | iwl_wake_queue(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 592 | } |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 593 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 594 | /* |
| 595 | * iwl_pcie_txq_free - Deallocate DMA queue. |
| 596 | * @txq: Transmit queue to deallocate. |
| 597 | * |
| 598 | * Empty queue by removing and destroying all BD's. |
| 599 | * Free all buffers. |
| 600 | * 0-fill, but do not free "txq" descriptor structure. |
| 601 | */ |
| 602 | static void iwl_pcie_txq_free(struct iwl_trans *trans, int txq_id) |
| 603 | { |
| 604 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 605 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 606 | struct device *dev = trans->dev; |
| 607 | int i; |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 608 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 609 | if (WARN_ON(!txq)) |
| 610 | return; |
| 611 | |
| 612 | iwl_pcie_txq_unmap(trans, txq_id); |
| 613 | |
| 614 | /* De-alloc array of command/tx buffers */ |
| 615 | if (txq_id == trans_pcie->cmd_queue) |
| 616 | for (i = 0; i < txq->q.n_window; i++) { |
Johannes Berg | 5d4185a | 2014-09-09 21:16:06 +0200 | [diff] [blame] | 617 | kzfree(txq->entries[i].cmd); |
| 618 | kzfree(txq->entries[i].free_buf); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | /* De-alloc circular buffer of TFDs */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 622 | if (txq->tfds) { |
| 623 | dma_free_coherent(dev, |
| 624 | sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX, |
| 625 | txq->tfds, txq->q.dma_addr); |
Johannes Berg | d21fa2d | 2013-01-08 00:25:21 +0100 | [diff] [blame] | 626 | txq->q.dma_addr = 0; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 627 | txq->tfds = NULL; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 628 | |
| 629 | dma_free_coherent(dev, |
| 630 | sizeof(*txq->scratchbufs) * txq->q.n_window, |
| 631 | txq->scratchbufs, txq->scratchbufs_dma); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | kfree(txq->entries); |
| 635 | txq->entries = NULL; |
| 636 | |
| 637 | del_timer_sync(&txq->stuck_timer); |
| 638 | |
| 639 | /* 0-fill queue descriptor structure */ |
| 640 | memset(txq, 0, sizeof(*txq)); |
| 641 | } |
| 642 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 643 | void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr) |
| 644 | { |
| 645 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 646 | int nq = trans->cfg->base_params->num_of_queues; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 647 | int chan; |
| 648 | u32 reg_val; |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 649 | int clear_dwords = (SCD_TRANS_TBL_OFFSET_QUEUE(nq) - |
| 650 | SCD_CONTEXT_MEM_LOWER_BOUND) / sizeof(u32); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 651 | |
| 652 | /* make sure all queue are not stopped/used */ |
| 653 | memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); |
| 654 | memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used)); |
| 655 | |
| 656 | trans_pcie->scd_base_addr = |
| 657 | iwl_read_prph(trans, SCD_SRAM_BASE_ADDR); |
| 658 | |
| 659 | WARN_ON(scd_base_addr != 0 && |
| 660 | scd_base_addr != trans_pcie->scd_base_addr); |
| 661 | |
Johannes Berg | 22dc3c9 | 2013-01-09 00:47:07 +0100 | [diff] [blame] | 662 | /* reset context data, TX status and translation data */ |
| 663 | iwl_trans_write_mem(trans, trans_pcie->scd_base_addr + |
| 664 | SCD_CONTEXT_MEM_LOWER_BOUND, |
| 665 | NULL, clear_dwords); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 666 | |
| 667 | iwl_write_prph(trans, SCD_DRAM_BASE_ADDR, |
| 668 | trans_pcie->scd_bc_tbls.dma >> 10); |
| 669 | |
| 670 | /* The chain extension of the SCD doesn't work well. This feature is |
| 671 | * enabled by default by the HW, so we need to disable it manually. |
| 672 | */ |
Emmanuel Grumbach | e03bbb6 | 2014-04-13 10:49:16 +0300 | [diff] [blame] | 673 | if (trans->cfg->base_params->scd_chain_ext_wa) |
| 674 | iwl_write_prph(trans, SCD_CHAINEXT_EN, 0); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 675 | |
| 676 | iwl_trans_ac_txq_enable(trans, trans_pcie->cmd_queue, |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 677 | trans_pcie->cmd_fifo, |
| 678 | trans_pcie->cmd_q_wdg_timeout); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 679 | |
| 680 | /* Activate all Tx DMA/FIFO channels */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 681 | iwl_scd_activate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 682 | |
| 683 | /* Enable DMA channel */ |
| 684 | for (chan = 0; chan < FH_TCSR_CHNL_NUM; chan++) |
| 685 | iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan), |
| 686 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | |
| 687 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); |
| 688 | |
| 689 | /* Update FH chicken bits */ |
| 690 | reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG); |
| 691 | iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG, |
| 692 | reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); |
| 693 | |
| 694 | /* Enable L1-Active */ |
Eran Harary | 3073d8c | 2013-12-29 14:09:59 +0200 | [diff] [blame] | 695 | if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) |
| 696 | iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, |
| 697 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 698 | } |
| 699 | |
Johannes Berg | ddaf5a5 | 2013-01-08 11:25:44 +0100 | [diff] [blame] | 700 | void iwl_trans_pcie_tx_reset(struct iwl_trans *trans) |
| 701 | { |
| 702 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 703 | int txq_id; |
| 704 | |
| 705 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 706 | txq_id++) { |
| 707 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 708 | |
| 709 | iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id), |
| 710 | txq->q.dma_addr >> 8); |
| 711 | iwl_pcie_txq_unmap(trans, txq_id); |
| 712 | txq->q.read_ptr = 0; |
| 713 | txq->q.write_ptr = 0; |
| 714 | } |
| 715 | |
| 716 | /* Tell NIC where to find the "keep warm" buffer */ |
| 717 | iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
| 718 | trans_pcie->kw.dma >> 4); |
| 719 | |
Emmanuel Grumbach | cd8f438 | 2015-01-29 21:34:00 +0200 | [diff] [blame] | 720 | /* |
| 721 | * Send 0 as the scd_base_addr since the device may have be reset |
| 722 | * while we were in WoWLAN in which case SCD_SRAM_BASE_ADDR will |
| 723 | * contain garbage. |
| 724 | */ |
| 725 | iwl_pcie_tx_start(trans, 0); |
Johannes Berg | ddaf5a5 | 2013-01-08 11:25:44 +0100 | [diff] [blame] | 726 | } |
| 727 | |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 728 | static void iwl_pcie_tx_stop_fh(struct iwl_trans *trans) |
| 729 | { |
| 730 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 731 | unsigned long flags; |
| 732 | int ch, ret; |
| 733 | u32 mask = 0; |
| 734 | |
| 735 | spin_lock(&trans_pcie->irq_lock); |
| 736 | |
| 737 | if (!iwl_trans_grab_nic_access(trans, false, &flags)) |
| 738 | goto out; |
| 739 | |
| 740 | /* Stop each Tx DMA channel */ |
| 741 | for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) { |
| 742 | iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); |
| 743 | mask |= FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch); |
| 744 | } |
| 745 | |
| 746 | /* Wait for DMA channels to be idle */ |
| 747 | ret = iwl_poll_bit(trans, FH_TSSR_TX_STATUS_REG, mask, mask, 5000); |
| 748 | if (ret < 0) |
| 749 | IWL_ERR(trans, |
| 750 | "Failing on timeout while stopping DMA channel %d [0x%08x]\n", |
| 751 | ch, iwl_read32(trans, FH_TSSR_TX_STATUS_REG)); |
| 752 | |
| 753 | iwl_trans_release_nic_access(trans, &flags); |
| 754 | |
| 755 | out: |
| 756 | spin_unlock(&trans_pcie->irq_lock); |
| 757 | } |
| 758 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 759 | /* |
| 760 | * iwl_pcie_tx_stop - Stop all Tx DMA channels |
| 761 | */ |
| 762 | int iwl_pcie_tx_stop(struct iwl_trans *trans) |
| 763 | { |
| 764 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 765 | int txq_id; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 766 | |
| 767 | /* Turn off all Tx DMA fifos */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 768 | iwl_scd_deactivate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 769 | |
Emmanuel Grumbach | 3627723 | 2015-02-25 15:49:39 +0200 | [diff] [blame] | 770 | /* Turn off all Tx DMA channels */ |
| 771 | iwl_pcie_tx_stop_fh(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 772 | |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 773 | /* |
| 774 | * This function can be called before the op_mode disabled the |
| 775 | * queues. This happens when we have an rfkill interrupt. |
| 776 | * Since we stop Tx altogether - mark the queues as stopped. |
| 777 | */ |
| 778 | memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped)); |
| 779 | memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used)); |
| 780 | |
| 781 | /* This can happen: start_hw, stop_device */ |
| 782 | if (!trans_pcie->txq) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 783 | return 0; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 784 | |
| 785 | /* Unmap DMA from host system and free skb's */ |
| 786 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 787 | txq_id++) |
| 788 | iwl_pcie_txq_unmap(trans, txq_id); |
Ron Rindjunsky | 1053d35 | 2008-05-05 10:22:43 +0800 | [diff] [blame] | 789 | |
| 790 | return 0; |
| 791 | } |
| 792 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 793 | /* |
| 794 | * iwl_trans_tx_free - Free TXQ Context |
| 795 | * |
| 796 | * Destroy all TX DMA queues and structures |
| 797 | */ |
| 798 | void iwl_pcie_tx_free(struct iwl_trans *trans) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 799 | { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 800 | int txq_id; |
| 801 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 802 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 803 | /* Tx queues */ |
| 804 | if (trans_pcie->txq) { |
| 805 | for (txq_id = 0; |
| 806 | txq_id < trans->cfg->base_params->num_of_queues; txq_id++) |
| 807 | iwl_pcie_txq_free(trans, txq_id); |
| 808 | } |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 809 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 810 | kfree(trans_pcie->txq); |
| 811 | trans_pcie->txq = NULL; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 812 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 813 | iwl_pcie_free_dma_ptr(trans, &trans_pcie->kw); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 814 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 815 | iwl_pcie_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 816 | } |
| 817 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 818 | /* |
| 819 | * iwl_pcie_tx_alloc - allocate TX context |
| 820 | * Allocate all Tx DMA structures and initialize them |
| 821 | */ |
| 822 | static int iwl_pcie_tx_alloc(struct iwl_trans *trans) |
| 823 | { |
| 824 | int ret; |
| 825 | int txq_id, slots_num; |
| 826 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 827 | |
| 828 | u16 scd_bc_tbls_size = trans->cfg->base_params->num_of_queues * |
| 829 | sizeof(struct iwlagn_scd_bc_tbl); |
| 830 | |
| 831 | /*It is not allowed to alloc twice, so warn when this happens. |
| 832 | * We cannot rely on the previous allocation, so free and fail */ |
| 833 | if (WARN_ON(trans_pcie->txq)) { |
| 834 | ret = -EINVAL; |
| 835 | goto error; |
| 836 | } |
| 837 | |
| 838 | ret = iwl_pcie_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls, |
| 839 | scd_bc_tbls_size); |
| 840 | if (ret) { |
| 841 | IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); |
| 842 | goto error; |
| 843 | } |
| 844 | |
| 845 | /* Alloc keep-warm buffer */ |
| 846 | ret = iwl_pcie_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE); |
| 847 | if (ret) { |
| 848 | IWL_ERR(trans, "Keep Warm allocation failed\n"); |
| 849 | goto error; |
| 850 | } |
| 851 | |
| 852 | trans_pcie->txq = kcalloc(trans->cfg->base_params->num_of_queues, |
| 853 | sizeof(struct iwl_txq), GFP_KERNEL); |
| 854 | if (!trans_pcie->txq) { |
| 855 | IWL_ERR(trans, "Not enough memory for txq\n"); |
Dan Carpenter | 2ab9ba0 | 2013-08-11 02:03:21 +0300 | [diff] [blame] | 856 | ret = -ENOMEM; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 857 | goto error; |
| 858 | } |
| 859 | |
| 860 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
| 861 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 862 | txq_id++) { |
| 863 | slots_num = (txq_id == trans_pcie->cmd_queue) ? |
| 864 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
| 865 | ret = iwl_pcie_txq_alloc(trans, &trans_pcie->txq[txq_id], |
| 866 | slots_num, txq_id); |
| 867 | if (ret) { |
| 868 | IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); |
| 869 | goto error; |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | return 0; |
| 874 | |
| 875 | error: |
| 876 | iwl_pcie_tx_free(trans); |
| 877 | |
| 878 | return ret; |
| 879 | } |
| 880 | int iwl_pcie_tx_init(struct iwl_trans *trans) |
| 881 | { |
| 882 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 883 | int ret; |
| 884 | int txq_id, slots_num; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 885 | bool alloc = false; |
| 886 | |
| 887 | if (!trans_pcie->txq) { |
| 888 | ret = iwl_pcie_tx_alloc(trans); |
| 889 | if (ret) |
| 890 | goto error; |
| 891 | alloc = true; |
| 892 | } |
| 893 | |
Emmanuel Grumbach | 7b70bd6 | 2013-12-11 10:22:28 +0200 | [diff] [blame] | 894 | spin_lock(&trans_pcie->irq_lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 895 | |
| 896 | /* Turn off all Tx DMA fifos */ |
Avri Altman | 680073b | 2014-07-14 09:40:27 +0300 | [diff] [blame] | 897 | iwl_scd_deactivate_fifos(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 898 | |
| 899 | /* Tell NIC where to find the "keep warm" buffer */ |
| 900 | iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
| 901 | trans_pcie->kw.dma >> 4); |
| 902 | |
Emmanuel Grumbach | 7b70bd6 | 2013-12-11 10:22:28 +0200 | [diff] [blame] | 903 | spin_unlock(&trans_pcie->irq_lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 904 | |
| 905 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ |
| 906 | for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues; |
| 907 | txq_id++) { |
| 908 | slots_num = (txq_id == trans_pcie->cmd_queue) ? |
| 909 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
| 910 | ret = iwl_pcie_txq_init(trans, &trans_pcie->txq[txq_id], |
| 911 | slots_num, txq_id); |
| 912 | if (ret) { |
| 913 | IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); |
| 914 | goto error; |
| 915 | } |
| 916 | } |
| 917 | |
Emmanuel Grumbach | cb6bb12 | 2015-01-25 10:36:31 +0200 | [diff] [blame] | 918 | if (trans->cfg->base_params->num_of_queues > 20) |
| 919 | iwl_set_bits_prph(trans, SCD_GP_CTRL, |
| 920 | SCD_GP_CTRL_ENABLE_31_QUEUES); |
| 921 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 922 | return 0; |
| 923 | error: |
| 924 | /*Upon error, free only if we allocated something */ |
| 925 | if (alloc) |
| 926 | iwl_pcie_tx_free(trans); |
| 927 | return ret; |
| 928 | } |
| 929 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 930 | static inline void iwl_pcie_txq_progress(struct iwl_txq *txq) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 931 | { |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 932 | lockdep_assert_held(&txq->lock); |
| 933 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 934 | if (!txq->wd_timeout) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 935 | return; |
| 936 | |
| 937 | /* |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 938 | * station is asleep and we send data - that must |
| 939 | * be uAPSD or PS-Poll. Don't rearm the timer. |
| 940 | */ |
| 941 | if (txq->frozen) |
| 942 | return; |
| 943 | |
| 944 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 945 | * if empty delete timer, otherwise move timer forward |
| 946 | * since we're making progress on this queue |
| 947 | */ |
| 948 | if (txq->q.read_ptr == txq->q.write_ptr) |
| 949 | del_timer(&txq->stuck_timer); |
| 950 | else |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 951 | mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | /* Frees buffers until index _not_ inclusive */ |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 955 | void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn, |
| 956 | struct sk_buff_head *skbs) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 957 | { |
| 958 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 959 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 960 | int tfd_num = ssn & (TFD_QUEUE_SIZE_MAX - 1); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 961 | struct iwl_queue *q = &txq->q; |
| 962 | int last_to_free; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 963 | |
| 964 | /* This function is not meant to release cmd queue*/ |
| 965 | if (WARN_ON(txq_id == trans_pcie->cmd_queue)) |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 966 | return; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 967 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 968 | spin_lock_bh(&txq->lock); |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 969 | |
Emmanuel Grumbach | b967613 | 2013-06-13 11:45:59 +0300 | [diff] [blame] | 970 | if (!txq->active) { |
| 971 | IWL_DEBUG_TX_QUEUES(trans, "Q %d inactive - ignoring idx %d\n", |
| 972 | txq_id, ssn); |
| 973 | goto out; |
| 974 | } |
| 975 | |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 976 | if (txq->q.read_ptr == tfd_num) |
| 977 | goto out; |
| 978 | |
| 979 | IWL_DEBUG_TX_REPLY(trans, "[Q %d] %d -> %d (%d)\n", |
| 980 | txq_id, txq->q.read_ptr, tfd_num, ssn); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 981 | |
| 982 | /*Since we free until index _not_ inclusive, the one before index is |
| 983 | * the last we will free. This one must be used */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 984 | last_to_free = iwl_queue_dec_wrap(tfd_num); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 985 | |
Emmanuel Grumbach | 6ca6ebc | 2012-11-14 23:38:08 +0200 | [diff] [blame] | 986 | if (!iwl_queue_used(q, last_to_free)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 987 | IWL_ERR(trans, |
| 988 | "%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] | 989 | __func__, txq_id, last_to_free, TFD_QUEUE_SIZE_MAX, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 990 | q->write_ptr, q->read_ptr); |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 991 | goto out; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | if (WARN_ON(!skb_queue_empty(skbs))) |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 995 | goto out; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 996 | |
| 997 | for (; |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 998 | q->read_ptr != tfd_num; |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 999 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1000 | |
| 1001 | if (WARN_ON_ONCE(txq->entries[txq->q.read_ptr].skb == NULL)) |
| 1002 | continue; |
| 1003 | |
| 1004 | __skb_queue_tail(skbs, txq->entries[txq->q.read_ptr].skb); |
| 1005 | |
| 1006 | txq->entries[txq->q.read_ptr].skb = NULL; |
| 1007 | |
| 1008 | iwl_pcie_txq_inval_byte_cnt_tbl(trans, txq); |
| 1009 | |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1010 | iwl_pcie_txq_free_tfd(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1011 | } |
| 1012 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1013 | iwl_pcie_txq_progress(txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1014 | |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1015 | if (iwl_queue_space(&txq->q) > txq->q.low_mark) |
| 1016 | iwl_wake_queue(trans, txq); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1017 | |
| 1018 | if (q->read_ptr == q->write_ptr) { |
| 1019 | IWL_DEBUG_RPM(trans, "Q %d - last tx reclaimed\n", q->id); |
| 1020 | iwl_trans_pcie_unref(trans); |
| 1021 | } |
| 1022 | |
Emmanuel Grumbach | f6d497c | 2012-11-14 23:32:57 +0200 | [diff] [blame] | 1023 | out: |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1024 | spin_unlock_bh(&txq->lock); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1025 | } |
| 1026 | |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1027 | static int iwl_pcie_set_cmd_in_flight(struct iwl_trans *trans, |
| 1028 | const struct iwl_host_cmd *cmd) |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1029 | { |
| 1030 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1031 | int ret; |
| 1032 | |
| 1033 | lockdep_assert_held(&trans_pcie->reg_lock); |
| 1034 | |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1035 | if (!(cmd->flags & CMD_SEND_IN_IDLE) && |
| 1036 | !trans_pcie->ref_cmd_in_flight) { |
| 1037 | trans_pcie->ref_cmd_in_flight = true; |
| 1038 | IWL_DEBUG_RPM(trans, "set ref_cmd_in_flight - ref\n"); |
| 1039 | iwl_trans_pcie_ref(trans); |
| 1040 | } |
| 1041 | |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1042 | /* |
| 1043 | * wake up the NIC to make sure that the firmware will see the host |
| 1044 | * command - we will let the NIC sleep once all the host commands |
| 1045 | * returned. This needs to be done only on NICs that have |
| 1046 | * apmg_wake_up_wa set. |
| 1047 | */ |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1048 | if (trans->cfg->base_params->apmg_wake_up_wa && |
| 1049 | !trans_pcie->cmd_hold_nic_awake) { |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1050 | __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, |
| 1051 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| 1052 | if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) |
| 1053 | udelay(2); |
| 1054 | |
| 1055 | ret = iwl_poll_bit(trans, CSR_GP_CNTRL, |
| 1056 | CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, |
| 1057 | (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | |
| 1058 | CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), |
| 1059 | 15000); |
| 1060 | if (ret < 0) { |
| 1061 | __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, |
| 1062 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1063 | IWL_ERR(trans, "Failed to wake NIC for hcmd\n"); |
| 1064 | return -EIO; |
| 1065 | } |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1066 | trans_pcie->cmd_hold_nic_awake = true; |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | return 0; |
| 1070 | } |
| 1071 | |
| 1072 | static int iwl_pcie_clear_cmd_in_flight(struct iwl_trans *trans) |
| 1073 | { |
| 1074 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1075 | |
| 1076 | lockdep_assert_held(&trans_pcie->reg_lock); |
| 1077 | |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1078 | if (trans_pcie->ref_cmd_in_flight) { |
| 1079 | trans_pcie->ref_cmd_in_flight = false; |
| 1080 | IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight - unref\n"); |
| 1081 | iwl_trans_pcie_unref(trans); |
| 1082 | } |
| 1083 | |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1084 | if (trans->cfg->base_params->apmg_wake_up_wa) { |
| 1085 | if (WARN_ON(!trans_pcie->cmd_hold_nic_awake)) |
| 1086 | return 0; |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1087 | |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1088 | trans_pcie->cmd_hold_nic_awake = false; |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1089 | __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, |
Ilan Peer | fc8a350 | 2015-05-13 14:34:07 +0300 | [diff] [blame] | 1090 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
| 1091 | } |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1092 | return 0; |
| 1093 | } |
| 1094 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1095 | /* |
| 1096 | * iwl_pcie_cmdq_reclaim - Reclaim TX command queue entries already Tx'd |
| 1097 | * |
| 1098 | * When FW advances 'R' index, all entries between old and new 'R' index |
| 1099 | * need to be reclaimed. As result, some free space forms. If there is |
| 1100 | * enough free space (> low mark), wake the stack that feeds us. |
| 1101 | */ |
| 1102 | static void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx) |
| 1103 | { |
| 1104 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
| 1105 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
| 1106 | struct iwl_queue *q = &txq->q; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1107 | unsigned long flags; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1108 | int nfreed = 0; |
| 1109 | |
| 1110 | lockdep_assert_held(&txq->lock); |
| 1111 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1112 | if ((idx >= TFD_QUEUE_SIZE_MAX) || (!iwl_queue_used(q, idx))) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1113 | IWL_ERR(trans, |
| 1114 | "%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] | 1115 | __func__, txq_id, idx, TFD_QUEUE_SIZE_MAX, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1116 | q->write_ptr, q->read_ptr); |
| 1117 | return; |
| 1118 | } |
| 1119 | |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1120 | for (idx = iwl_queue_inc_wrap(idx); q->read_ptr != idx; |
| 1121 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1122 | |
| 1123 | if (nfreed++ > 0) { |
| 1124 | IWL_ERR(trans, "HCMD skipped: index (%d) %d %d\n", |
| 1125 | idx, q->write_ptr, q->read_ptr); |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 1126 | iwl_force_nmi(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1127 | } |
| 1128 | } |
| 1129 | |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1130 | if (q->read_ptr == q->write_ptr) { |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1131 | spin_lock_irqsave(&trans_pcie->reg_lock, flags); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1132 | iwl_pcie_clear_cmd_in_flight(trans); |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1133 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1134 | } |
| 1135 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1136 | iwl_pcie_txq_progress(txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | 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] | 1140 | u16 txq_id) |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1141 | { |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1142 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1143 | u32 tbl_dw_addr; |
| 1144 | u32 tbl_dw; |
| 1145 | u16 scd_q2ratid; |
| 1146 | |
| 1147 | scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK; |
| 1148 | |
Emmanuel Grumbach | 105183b | 2011-08-25 23:11:02 -0700 | [diff] [blame] | 1149 | tbl_dw_addr = trans_pcie->scd_base_addr + |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1150 | SCD_TRANS_TBL_OFFSET_QUEUE(txq_id); |
| 1151 | |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 1152 | tbl_dw = iwl_trans_read_mem32(trans, tbl_dw_addr); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1153 | |
| 1154 | if (txq_id & 0x1) |
| 1155 | tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); |
| 1156 | else |
| 1157 | tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); |
| 1158 | |
Emmanuel Grumbach | 4fd442d | 2012-12-24 14:27:11 +0200 | [diff] [blame] | 1159 | iwl_trans_write_mem32(trans, tbl_dw_addr, tbl_dw); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1160 | |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
Emmanuel Grumbach | bd5f6a3 | 2013-04-28 14:05:22 +0300 | [diff] [blame] | 1164 | /* Receiver address (actually, Rx station's index into station table), |
| 1165 | * combined with Traffic ID (QOS priority), in format used by Tx Scheduler */ |
| 1166 | #define BUILD_RAxTID(sta_id, tid) (((sta_id) << 4) + (tid)) |
| 1167 | |
Johannes Berg | fea7795 | 2014-08-01 11:58:47 +0200 | [diff] [blame] | 1168 | 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] | 1169 | const struct iwl_trans_txq_scd_cfg *cfg, |
| 1170 | unsigned int wdg_timeout) |
Johannes Berg | 70a18c5 | 2012-03-05 11:24:44 -0800 | [diff] [blame] | 1171 | { |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1172 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1173 | struct iwl_txq *txq = &trans_pcie->txq[txq_id]; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1174 | int fifo = -1; |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1175 | |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1176 | if (test_and_set_bit(txq_id, trans_pcie->queue_used)) |
| 1177 | WARN_ONCE(1, "queue %d already used - expect issues", txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1178 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1179 | txq->wd_timeout = msecs_to_jiffies(wdg_timeout); |
| 1180 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1181 | if (cfg) { |
| 1182 | fifo = cfg->fifo; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1183 | |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1184 | /* Disable the scheduler prior configuring the cmd queue */ |
Emmanuel Grumbach | 3a736bc | 2014-09-10 11:16:41 +0300 | [diff] [blame] | 1185 | if (txq_id == trans_pcie->cmd_queue && |
| 1186 | trans_pcie->scd_set_active) |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1187 | iwl_scd_enable_set_active(trans, 0); |
| 1188 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1189 | /* Stop this Tx queue before configuring it */ |
| 1190 | iwl_scd_txq_set_inactive(trans, txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1191 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1192 | /* Set this queue as a chain-building queue unless it is CMD */ |
| 1193 | if (txq_id != trans_pcie->cmd_queue) |
| 1194 | iwl_scd_txq_set_chain(trans, txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1195 | |
Johannes Berg | 64ba893 | 2014-08-01 13:33:46 +0200 | [diff] [blame] | 1196 | if (cfg->aggregate) { |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1197 | u16 ra_tid = BUILD_RAxTID(cfg->sta_id, cfg->tid); |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1198 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1199 | /* Map receiver-address / traffic-ID to this queue */ |
| 1200 | iwl_pcie_txq_set_ratid_map(trans, ra_tid, txq_id); |
Emmanuel Grumbach | f477252 | 2013-07-24 14:15:21 +0300 | [diff] [blame] | 1201 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1202 | /* enable aggregations for the queue */ |
| 1203 | iwl_scd_txq_enable_agg(trans, txq_id); |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1204 | txq->ampdu = true; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1205 | } else { |
| 1206 | /* |
| 1207 | * disable aggregations for the queue, this will also |
| 1208 | * make the ra_tid mapping configuration irrelevant |
| 1209 | * since it is now a non-AGG queue. |
| 1210 | */ |
| 1211 | iwl_scd_txq_disable_agg(trans, txq_id); |
| 1212 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1213 | ssn = txq->q.read_ptr; |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1214 | } |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1215 | } |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1216 | |
| 1217 | /* Place first TFD at index corresponding to start sequence number. |
| 1218 | * Assumes that ssn_idx is valid (!= 0xFFF) */ |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1219 | txq->q.read_ptr = (ssn & 0xff); |
| 1220 | txq->q.write_ptr = (ssn & 0xff); |
Emmanuel Grumbach | 0294d9e | 2015-01-05 16:52:55 +0200 | [diff] [blame] | 1221 | iwl_write_direct32(trans, HBUS_TARG_WRPTR, |
| 1222 | (ssn & 0xff) | (txq_id << 8)); |
Emmanuel Grumbach | 1ce8658 | 2012-06-04 16:48:17 +0300 | [diff] [blame] | 1223 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1224 | if (cfg) { |
| 1225 | u8 frame_limit = cfg->frame_limit; |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1226 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1227 | iwl_write_prph(trans, SCD_QUEUE_RDPTR(txq_id), ssn); |
| 1228 | |
| 1229 | /* Set up Tx window size and frame limit for this queue */ |
| 1230 | iwl_trans_write_mem32(trans, trans_pcie->scd_base_addr + |
| 1231 | SCD_CONTEXT_QUEUE_OFFSET(txq_id), 0); |
| 1232 | iwl_trans_write_mem32(trans, |
| 1233 | trans_pcie->scd_base_addr + |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1234 | SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), |
| 1235 | ((frame_limit << SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1236 | SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1237 | ((frame_limit << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1238 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1239 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1240 | /* Set up status area in SRAM, map to Tx DMA/FIFO, activate */ |
| 1241 | iwl_write_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id), |
| 1242 | (1 << SCD_QUEUE_STTS_REG_POS_ACTIVE) | |
| 1243 | (cfg->fifo << SCD_QUEUE_STTS_REG_POS_TXF) | |
| 1244 | (1 << SCD_QUEUE_STTS_REG_POS_WSL) | |
| 1245 | SCD_QUEUE_STTS_REG_MSK); |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1246 | |
| 1247 | /* enable the scheduler for this queue (only) */ |
Emmanuel Grumbach | 3a736bc | 2014-09-10 11:16:41 +0300 | [diff] [blame] | 1248 | if (txq_id == trans_pcie->cmd_queue && |
| 1249 | trans_pcie->scd_set_active) |
Avri Altman | 002a9e2 | 2014-07-24 19:25:10 +0300 | [diff] [blame] | 1250 | iwl_scd_enable_set_active(trans, BIT(txq_id)); |
Emmanuel Grumbach | 0294d9e | 2015-01-05 16:52:55 +0200 | [diff] [blame] | 1251 | |
| 1252 | IWL_DEBUG_TX_QUEUES(trans, |
| 1253 | "Activate queue %d on FIFO %d WrPtr: %d\n", |
| 1254 | txq_id, fifo, ssn & 0xff); |
| 1255 | } else { |
| 1256 | IWL_DEBUG_TX_QUEUES(trans, |
| 1257 | "Activate queue %d WrPtr: %d\n", |
| 1258 | txq_id, ssn & 0xff); |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1259 | } |
| 1260 | |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1261 | txq->active = true; |
Emmanuel Grumbach | 4beaf6c | 2012-05-29 11:29:10 +0300 | [diff] [blame] | 1262 | } |
| 1263 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1264 | void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id, |
| 1265 | bool configure_scd) |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 1266 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1267 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 986ea6c | 2012-09-30 16:25:43 +0200 | [diff] [blame] | 1268 | u32 stts_addr = trans_pcie->scd_base_addr + |
| 1269 | SCD_TX_STTS_QUEUE_OFFSET(txq_id); |
| 1270 | static const u32 zero_val[4] = {}; |
Emmanuel Grumbach | 288712a | 2011-08-25 23:11:25 -0700 | [diff] [blame] | 1271 | |
Emmanuel Grumbach | e0b8d405 | 2015-01-20 17:02:40 +0200 | [diff] [blame] | 1272 | trans_pcie->txq[txq_id].frozen_expiry_remainder = 0; |
| 1273 | trans_pcie->txq[txq_id].frozen = false; |
| 1274 | |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 1275 | /* |
| 1276 | * Upon HW Rfkill - we stop the device, and then stop the queues |
| 1277 | * in the op_mode. Just for the sake of the simplicity of the op_mode, |
| 1278 | * allow the op_mode to call txq_disable after it already called |
| 1279 | * stop_device. |
| 1280 | */ |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1281 | if (!test_and_clear_bit(txq_id, trans_pcie->queue_used)) { |
Emmanuel Grumbach | fba1c62 | 2013-12-19 22:19:17 +0200 | [diff] [blame] | 1282 | WARN_ONCE(test_bit(STATUS_DEVICE_ENABLED, &trans->status), |
| 1283 | "queue %d not used", txq_id); |
Johannes Berg | 9eae88f | 2012-03-15 13:26:52 -0700 | [diff] [blame] | 1284 | return; |
Emmanuel Grumbach | bc23773 | 2011-11-21 13:25:31 +0200 | [diff] [blame] | 1285 | } |
| 1286 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1287 | if (configure_scd) { |
| 1288 | iwl_scd_txq_set_inactive(trans, txq_id); |
Emmanuel Grumbach | ac928f8 | 2012-10-14 16:36:36 +0200 | [diff] [blame] | 1289 | |
Johannes Berg | d4578ea | 2014-08-01 12:17:40 +0200 | [diff] [blame] | 1290 | iwl_trans_write_mem(trans, stts_addr, (void *)zero_val, |
| 1291 | ARRAY_SIZE(zero_val)); |
| 1292 | } |
Emmanuel Grumbach | 986ea6c | 2012-09-30 16:25:43 +0200 | [diff] [blame] | 1293 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1294 | iwl_pcie_txq_unmap(trans, txq_id); |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 1295 | trans_pcie->txq[txq_id].ampdu = false; |
Emmanuel Grumbach | 6c3fd3f | 2012-10-18 12:38:37 +0200 | [diff] [blame] | 1296 | |
Emmanuel Grumbach | 1ce8658 | 2012-06-04 16:48:17 +0300 | [diff] [blame] | 1297 | IWL_DEBUG_TX_QUEUES(trans, "Deactivate queue %d\n", txq_id); |
Emmanuel Grumbach | 48d42c4 | 2011-07-10 10:47:01 +0300 | [diff] [blame] | 1298 | } |
| 1299 | |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1300 | /*************** HOST COMMAND QUEUE FUNCTIONS *****/ |
| 1301 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1302 | /* |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1303 | * iwl_pcie_enqueue_hcmd - enqueue a uCode command |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1304 | * @priv: device private data point |
Eliad Peller | e89044d | 2013-07-16 17:33:26 +0300 | [diff] [blame] | 1305 | * @cmd: a pointer to the ucode command structure |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1306 | * |
Eliad Peller | e89044d | 2013-07-16 17:33:26 +0300 | [diff] [blame] | 1307 | * The function returns < 0 values to indicate the operation |
| 1308 | * failed. On success, it returns the index (>= 0) of command in the |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1309 | * command queue. |
| 1310 | */ |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1311 | static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans, |
| 1312 | struct iwl_host_cmd *cmd) |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1313 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1314 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1315 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1316 | struct iwl_queue *q = &txq->q; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1317 | struct iwl_device_cmd *out_cmd; |
| 1318 | struct iwl_cmd_meta *out_meta; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1319 | unsigned long flags; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1320 | void *dup_buf = NULL; |
Tomas Winkler | f367422 | 2008-08-04 16:00:44 +0800 | [diff] [blame] | 1321 | dma_addr_t phys_addr; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1322 | int idx; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1323 | u16 copy_size, cmd_size, scratch_size; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1324 | bool had_nocopy = false; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1325 | int i, ret; |
Emmanuel Grumbach | 9679142 | 2012-07-24 01:58:32 +0300 | [diff] [blame] | 1326 | u32 cmd_pos; |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1327 | const u8 *cmddata[IWL_MAX_CMD_TBS_PER_TFD]; |
| 1328 | u16 cmdlen[IWL_MAX_CMD_TBS_PER_TFD]; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1329 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1330 | copy_size = sizeof(out_cmd->hdr); |
| 1331 | cmd_size = sizeof(out_cmd->hdr); |
| 1332 | |
| 1333 | /* need one for the header if the first is NOCOPY */ |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1334 | 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] | 1335 | |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1336 | for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1337 | cmddata[i] = cmd->data[i]; |
| 1338 | cmdlen[i] = cmd->len[i]; |
| 1339 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1340 | if (!cmd->len[i]) |
| 1341 | continue; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1342 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1343 | /* need at least IWL_HCMD_SCRATCHBUF_SIZE copied */ |
| 1344 | if (copy_size < IWL_HCMD_SCRATCHBUF_SIZE) { |
| 1345 | int copy = IWL_HCMD_SCRATCHBUF_SIZE - copy_size; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1346 | |
| 1347 | if (copy > cmdlen[i]) |
| 1348 | copy = cmdlen[i]; |
| 1349 | cmdlen[i] -= copy; |
| 1350 | cmddata[i] += copy; |
| 1351 | copy_size += copy; |
| 1352 | } |
| 1353 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1354 | if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY) { |
| 1355 | had_nocopy = true; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1356 | if (WARN_ON(cmd->dataflags[i] & IWL_HCMD_DFL_DUP)) { |
| 1357 | idx = -EINVAL; |
| 1358 | goto free_dup_buf; |
| 1359 | } |
| 1360 | } else if (cmd->dataflags[i] & IWL_HCMD_DFL_DUP) { |
| 1361 | /* |
| 1362 | * This is also a chunk that isn't copied |
| 1363 | * to the static buffer so set had_nocopy. |
| 1364 | */ |
| 1365 | had_nocopy = true; |
| 1366 | |
| 1367 | /* only allowed once */ |
| 1368 | if (WARN_ON(dup_buf)) { |
| 1369 | idx = -EINVAL; |
| 1370 | goto free_dup_buf; |
| 1371 | } |
| 1372 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1373 | dup_buf = kmemdup(cmddata[i], cmdlen[i], |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1374 | GFP_ATOMIC); |
| 1375 | if (!dup_buf) |
| 1376 | return -ENOMEM; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1377 | } else { |
| 1378 | /* NOCOPY must not be followed by normal! */ |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1379 | if (WARN_ON(had_nocopy)) { |
| 1380 | idx = -EINVAL; |
| 1381 | goto free_dup_buf; |
| 1382 | } |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1383 | copy_size += cmdlen[i]; |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1384 | } |
| 1385 | cmd_size += cmd->len[i]; |
| 1386 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1387 | |
Johannes Berg | 3e41ace | 2011-04-18 09:12:37 -0700 | [diff] [blame] | 1388 | /* |
| 1389 | * If any of the command structures end up being larger than |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1390 | * the TFD_MAX_PAYLOAD_SIZE and they aren't dynamically |
| 1391 | * allocated into separate TFDs, then we will need to |
| 1392 | * increase the size of the buffers. |
Johannes Berg | 3e41ace | 2011-04-18 09:12:37 -0700 | [diff] [blame] | 1393 | */ |
Johannes Berg | 2a79e45 | 2012-09-26 13:32:13 +0200 | [diff] [blame] | 1394 | if (WARN(copy_size > TFD_MAX_PAYLOAD_SIZE, |
| 1395 | "Command %s (%#x) is too large (%d bytes)\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1396 | get_cmd_string(trans_pcie, cmd->id), cmd->id, copy_size)) { |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1397 | idx = -EINVAL; |
| 1398 | goto free_dup_buf; |
| 1399 | } |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1400 | |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1401 | spin_lock_bh(&txq->lock); |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1402 | |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1403 | if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1404 | spin_unlock_bh(&txq->lock); |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1405 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1406 | IWL_ERR(trans, "No space in command queue\n"); |
Johannes Berg | 0e78184 | 2012-03-06 13:30:49 -0800 | [diff] [blame] | 1407 | iwl_op_mode_cmd_queue_full(trans->op_mode); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1408 | idx = -ENOSPC; |
| 1409 | goto free_dup_buf; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1410 | } |
| 1411 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1412 | idx = get_cmd_index(q, q->write_ptr); |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1413 | out_cmd = txq->entries[idx].cmd; |
| 1414 | out_meta = &txq->entries[idx].meta; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1415 | |
Daniel C Halperin | 8ce73f3 | 2009-07-31 14:28:06 -0700 | [diff] [blame] | 1416 | memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */ |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1417 | if (cmd->flags & CMD_WANT_SKB) |
| 1418 | out_meta->source = cmd; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1419 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1420 | /* set up the header */ |
| 1421 | |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1422 | out_cmd->hdr.cmd = cmd->id; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1423 | out_cmd->hdr.flags = 0; |
Emmanuel Grumbach | cefeaa5 | 2011-08-25 23:10:40 -0700 | [diff] [blame] | 1424 | out_cmd->hdr.sequence = |
Meenakshi Venkataraman | c6f600f | 2012-03-08 11:29:12 -0800 | [diff] [blame] | 1425 | cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) | |
Emmanuel Grumbach | cefeaa5 | 2011-08-25 23:10:40 -0700 | [diff] [blame] | 1426 | INDEX_TO_SEQ(q->write_ptr)); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1427 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1428 | /* and copy the data that needs to be copied */ |
Emmanuel Grumbach | 9679142 | 2012-07-24 01:58:32 +0300 | [diff] [blame] | 1429 | cmd_pos = offsetof(struct iwl_device_cmd, payload); |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1430 | copy_size = sizeof(out_cmd->hdr); |
Johannes Berg | 1afbfb6 | 2013-02-26 11:32:26 +0100 | [diff] [blame] | 1431 | for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) { |
Johannes Berg | 4d07500 | 2014-04-24 10:41:31 +0200 | [diff] [blame] | 1432 | int copy; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1433 | |
Emmanuel Grumbach | cc904c7 | 2013-03-14 08:35:06 +0200 | [diff] [blame] | 1434 | if (!cmd->len[i]) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1435 | continue; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1436 | |
Johannes Berg | 4d07500 | 2014-04-24 10:41:31 +0200 | [diff] [blame] | 1437 | /* copy everything if not nocopy/dup */ |
| 1438 | if (!(cmd->dataflags[i] & (IWL_HCMD_DFL_NOCOPY | |
| 1439 | IWL_HCMD_DFL_DUP))) { |
| 1440 | copy = cmd->len[i]; |
| 1441 | |
| 1442 | memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); |
| 1443 | cmd_pos += copy; |
| 1444 | copy_size += copy; |
| 1445 | continue; |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * Otherwise we need at least IWL_HCMD_SCRATCHBUF_SIZE copied |
| 1450 | * in total (for the scratchbuf handling), but copy up to what |
| 1451 | * we can fit into the payload for debug dump purposes. |
| 1452 | */ |
| 1453 | copy = min_t(int, TFD_MAX_PAYLOAD_SIZE - cmd_pos, cmd->len[i]); |
| 1454 | |
| 1455 | memcpy((u8 *)out_cmd + cmd_pos, cmd->data[i], copy); |
| 1456 | cmd_pos += copy; |
| 1457 | |
| 1458 | /* However, treat copy_size the proper way, we need it below */ |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1459 | if (copy_size < IWL_HCMD_SCRATCHBUF_SIZE) { |
| 1460 | copy = IWL_HCMD_SCRATCHBUF_SIZE - copy_size; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1461 | |
| 1462 | if (copy > cmd->len[i]) |
| 1463 | copy = cmd->len[i]; |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1464 | copy_size += copy; |
| 1465 | } |
Emmanuel Grumbach | 9679142 | 2012-07-24 01:58:32 +0300 | [diff] [blame] | 1466 | } |
| 1467 | |
Johannes Berg | d9fb646 | 2012-03-26 08:23:39 -0700 | [diff] [blame] | 1468 | IWL_DEBUG_HC(trans, |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1469 | "Sending command %s (#%x), seq: 0x%04X, %d bytes at %d[%d]:%d\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1470 | get_cmd_string(trans_pcie, out_cmd->hdr.cmd), |
Johannes Berg | 20d3b64 | 2012-05-16 22:54:29 +0200 | [diff] [blame] | 1471 | out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence), |
| 1472 | cmd_size, q->write_ptr, idx, trans_pcie->cmd_queue); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1473 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1474 | /* start the TFD with the scratchbuf */ |
| 1475 | scratch_size = min_t(int, copy_size, IWL_HCMD_SCRATCHBUF_SIZE); |
| 1476 | memcpy(&txq->scratchbufs[q->write_ptr], &out_cmd->hdr, scratch_size); |
| 1477 | iwl_pcie_txq_build_tfd(trans, txq, |
| 1478 | iwl_pcie_get_scratchbuf_dma(txq, q->write_ptr), |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1479 | scratch_size, true); |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1480 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1481 | /* map first command fragment, if any remains */ |
| 1482 | if (copy_size > scratch_size) { |
| 1483 | phys_addr = dma_map_single(trans->dev, |
| 1484 | ((u8 *)&out_cmd->hdr) + scratch_size, |
| 1485 | copy_size - scratch_size, |
| 1486 | DMA_TO_DEVICE); |
| 1487 | if (dma_mapping_error(trans->dev, phys_addr)) { |
| 1488 | iwl_pcie_tfd_unmap(trans, out_meta, |
| 1489 | &txq->tfds[q->write_ptr]); |
| 1490 | idx = -ENOMEM; |
| 1491 | goto out; |
| 1492 | } |
| 1493 | |
| 1494 | iwl_pcie_txq_build_tfd(trans, txq, phys_addr, |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1495 | copy_size - scratch_size, false); |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1496 | } |
| 1497 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1498 | /* map the remaining (adjusted) nocopy/dup fragments */ |
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 | const void *data = cmddata[i]; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1501 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1502 | if (!cmdlen[i]) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1503 | continue; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1504 | if (!(cmd->dataflags[i] & (IWL_HCMD_DFL_NOCOPY | |
| 1505 | IWL_HCMD_DFL_DUP))) |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1506 | continue; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1507 | if (cmd->dataflags[i] & IWL_HCMD_DFL_DUP) |
| 1508 | data = dup_buf; |
| 1509 | phys_addr = dma_map_single(trans->dev, (void *)data, |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1510 | cmdlen[i], DMA_TO_DEVICE); |
Emmanuel Grumbach | 1042db2 | 2012-01-03 16:56:15 +0200 | [diff] [blame] | 1511 | if (dma_mapping_error(trans->dev, phys_addr)) { |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1512 | iwl_pcie_tfd_unmap(trans, out_meta, |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1513 | &txq->tfds[q->write_ptr]); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1514 | idx = -ENOMEM; |
| 1515 | goto out; |
| 1516 | } |
| 1517 | |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1518 | iwl_pcie_txq_build_tfd(trans, txq, phys_addr, cmdlen[i], false); |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1519 | } |
Reinette Chatre | df833b1 | 2009-04-21 10:55:48 -0700 | [diff] [blame] | 1520 | |
Emmanuel Grumbach | afaf6b5 | 2011-07-08 08:46:09 -0700 | [diff] [blame] | 1521 | out_meta->flags = cmd->flags; |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1522 | if (WARN_ON_ONCE(txq->entries[idx].free_buf)) |
Johannes Berg | 5d4185a | 2014-09-09 21:16:06 +0200 | [diff] [blame] | 1523 | kzfree(txq->entries[idx].free_buf); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1524 | txq->entries[idx].free_buf = dup_buf; |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1525 | |
Johannes Berg | 8a964f4 | 2013-02-25 16:01:34 +0100 | [diff] [blame] | 1526 | trace_iwlwifi_dev_hcmd(trans->dev, cmd, cmd_size, &out_cmd->hdr); |
Reinette Chatre | df833b1 | 2009-04-21 10:55:48 -0700 | [diff] [blame] | 1527 | |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 1528 | /* start timer if queue currently empty */ |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1529 | if (q->read_ptr == q->write_ptr && txq->wd_timeout) |
| 1530 | mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 1531 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1532 | spin_lock_irqsave(&trans_pcie->reg_lock, flags); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1533 | ret = iwl_pcie_set_cmd_in_flight(trans, cmd); |
Eliad Peller | 804d4c5 | 2014-11-20 14:36:26 +0200 | [diff] [blame] | 1534 | if (ret < 0) { |
| 1535 | idx = ret; |
| 1536 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1537 | goto out; |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1538 | } |
| 1539 | |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1540 | /* Increment and update queue's write index */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1541 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1542 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1543 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1544 | spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); |
| 1545 | |
Johannes Berg | 2c46f72 | 2011-04-28 07:27:10 -0700 | [diff] [blame] | 1546 | out: |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1547 | spin_unlock_bh(&txq->lock); |
Johannes Berg | f4feb8a | 2012-10-19 14:24:43 +0200 | [diff] [blame] | 1548 | free_dup_buf: |
| 1549 | if (idx < 0) |
| 1550 | kfree(dup_buf); |
Abhijeet Kolekar | 7bfedc5 | 2010-02-03 13:47:56 -0800 | [diff] [blame] | 1551 | return idx; |
Tomas Winkler | fd4abac | 2008-05-15 13:54:07 +0800 | [diff] [blame] | 1552 | } |
| 1553 | |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1554 | /* |
| 1555 | * 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] | 1556 | * @rxb: Rx buffer to reclaim |
Emmanuel Grumbach | 247c61d | 2011-09-20 15:37:23 -0700 | [diff] [blame] | 1557 | * @handler_status: return value of the handler of the command |
| 1558 | * (put in setup_rx_handlers) |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1559 | * |
| 1560 | * If an Rx buffer has an async callback associated with it the callback |
| 1561 | * will be executed. The attached skb (if present) will only be freed |
| 1562 | * if the callback returns 1 |
| 1563 | */ |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1564 | void iwl_pcie_hcmd_complete(struct iwl_trans *trans, |
| 1565 | struct iwl_rx_cmd_buffer *rxb, int handler_status) |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1566 | { |
Zhu Yi | 2f30122 | 2009-10-09 17:19:45 +0800 | [diff] [blame] | 1567 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1568 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); |
| 1569 | int txq_id = SEQ_TO_QUEUE(sequence); |
| 1570 | int index = SEQ_TO_INDEX(sequence); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1571 | int cmd_index; |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1572 | struct iwl_device_cmd *cmd; |
| 1573 | struct iwl_cmd_meta *meta; |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1574 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1575 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1576 | |
| 1577 | /* If a Tx command is being handled and it isn't in the actual |
| 1578 | * command queue then there a command routing bug has been introduced |
| 1579 | * in the queue management code. */ |
Meenakshi Venkataraman | c6f600f | 2012-03-08 11:29:12 -0800 | [diff] [blame] | 1580 | if (WARN(txq_id != trans_pcie->cmd_queue, |
Johannes Berg | 13bb948 | 2010-08-23 10:46:33 +0200 | [diff] [blame] | 1581 | "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] | 1582 | txq_id, trans_pcie->cmd_queue, sequence, |
| 1583 | trans_pcie->txq[trans_pcie->cmd_queue].q.read_ptr, |
| 1584 | trans_pcie->txq[trans_pcie->cmd_queue].q.write_ptr)) { |
Emmanuel Grumbach | 3e10cae | 2011-09-06 09:31:18 -0700 | [diff] [blame] | 1585 | iwl_print_hex_error(trans, pkt, 32); |
Johannes Berg | 55d6a3c | 2008-09-23 19:18:43 +0200 | [diff] [blame] | 1586 | return; |
Winkler, Tomas | 01ef9323 | 2008-11-07 09:58:45 -0800 | [diff] [blame] | 1587 | } |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1588 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1589 | spin_lock_bh(&txq->lock); |
Johannes Berg | 015c15e | 2012-03-05 11:24:24 -0800 | [diff] [blame] | 1590 | |
Johannes Berg | 4ce7cc2 | 2011-05-13 11:57:40 -0700 | [diff] [blame] | 1591 | cmd_index = get_cmd_index(&txq->q, index); |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1592 | cmd = txq->entries[cmd_index].cmd; |
| 1593 | meta = &txq->entries[cmd_index].meta; |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1594 | |
Johannes Berg | 9889175 | 2013-02-26 11:28:19 +0100 | [diff] [blame] | 1595 | iwl_pcie_tfd_unmap(trans, meta, &txq->tfds[index]); |
Reinette Chatre | c33de62 | 2009-10-30 14:36:10 -0700 | [diff] [blame] | 1596 | |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1597 | /* Input error checking is done when commands are added to queue. */ |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1598 | if (meta->flags & CMD_WANT_SKB) { |
Johannes Berg | 48a2d66 | 2012-03-05 11:24:39 -0800 | [diff] [blame] | 1599 | struct page *p = rxb_steal_page(rxb); |
Stanislaw Gruszka | 2624e96 | 2011-04-20 16:02:58 +0200 | [diff] [blame] | 1600 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1601 | meta->source->resp_pkt = pkt; |
| 1602 | meta->source->_rx_page_addr = (unsigned long)page_address(p); |
Johannes Berg | b2cf410 | 2012-04-09 17:46:51 -0700 | [diff] [blame] | 1603 | meta->source->_rx_page_order = trans_pcie->rx_page_order; |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1604 | meta->source->handler_status = handler_status; |
Stanislaw Gruszka | 2624e96 | 2011-04-20 16:02:58 +0200 | [diff] [blame] | 1605 | } |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1606 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1607 | iwl_pcie_cmdq_reclaim(trans, txq_id, index); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1608 | |
Johannes Berg | c2acea8 | 2009-07-24 11:13:05 -0700 | [diff] [blame] | 1609 | if (!(meta->flags & CMD_ASYNC)) { |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1610 | if (!test_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status)) { |
Wey-Yi Guy | 05c89b9 | 2011-10-10 07:26:48 -0700 | [diff] [blame] | 1611 | IWL_WARN(trans, |
| 1612 | "HCMD_ACTIVE already clear for command %s\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1613 | get_cmd_string(trans_pcie, cmd->hdr.cmd)); |
Wey-Yi Guy | 05c89b9 | 2011-10-10 07:26:48 -0700 | [diff] [blame] | 1614 | } |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1615 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1616 | IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1617 | get_cmd_string(trans_pcie, cmd->hdr.cmd)); |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1618 | wake_up(&trans_pcie->wait_command_queue); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1619 | } |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1620 | |
Zhu Yi | dd48744 | 2010-03-22 02:28:41 -0700 | [diff] [blame] | 1621 | meta->flags = 0; |
Stanislaw Gruszka | 3598e17 | 2011-03-31 17:36:26 +0200 | [diff] [blame] | 1622 | |
Johannes Berg | 2bfb509 | 2012-12-27 21:43:48 +0100 | [diff] [blame] | 1623 | spin_unlock_bh(&txq->lock); |
Tomas Winkler | 17b8892 | 2008-05-29 16:35:12 +0800 | [diff] [blame] | 1624 | } |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1625 | |
Johannes Berg | 9439eac | 2013-10-09 09:59:25 +0200 | [diff] [blame] | 1626 | #define HOST_COMPLETE_TIMEOUT (2 * HZ) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1627 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1628 | static int iwl_pcie_send_hcmd_async(struct iwl_trans *trans, |
| 1629 | struct iwl_host_cmd *cmd) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1630 | { |
Johannes Berg | d9fb646 | 2012-03-26 08:23:39 -0700 | [diff] [blame] | 1631 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1632 | int ret; |
| 1633 | |
| 1634 | /* An asynchronous command can not expect an SKB to be set. */ |
| 1635 | if (WARN_ON(cmd->flags & CMD_WANT_SKB)) |
| 1636 | return -EINVAL; |
| 1637 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1638 | ret = iwl_pcie_enqueue_hcmd(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1639 | if (ret < 0) { |
Johannes Berg | 721c32f | 2012-03-06 13:30:40 -0800 | [diff] [blame] | 1640 | IWL_ERR(trans, |
Todd Previte | b36b110 | 2011-11-10 06:55:02 -0800 | [diff] [blame] | 1641 | "Error sending %s: enqueue_hcmd failed: %d\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1642 | get_cmd_string(trans_pcie, cmd->id), ret); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1643 | return ret; |
| 1644 | } |
| 1645 | return 0; |
| 1646 | } |
| 1647 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1648 | static int iwl_pcie_send_hcmd_sync(struct iwl_trans *trans, |
| 1649 | struct iwl_host_cmd *cmd) |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1650 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1651 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1652 | int cmd_idx; |
| 1653 | int ret; |
| 1654 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1655 | IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1656 | get_cmd_string(trans_pcie, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1657 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1658 | if (WARN(test_and_set_bit(STATUS_SYNC_HCMD_ACTIVE, |
| 1659 | &trans->status), |
Johannes Berg | bcbb8c9 | 2013-10-28 15:50:55 +0100 | [diff] [blame] | 1660 | "Command %s: a command is already active!\n", |
| 1661 | get_cmd_string(trans_pcie, cmd->id))) |
Johannes Berg | 2cc39c9 | 2012-03-06 13:30:41 -0800 | [diff] [blame] | 1662 | return -EIO; |
Johannes Berg | 2cc39c9 | 2012-03-06 13:30:41 -0800 | [diff] [blame] | 1663 | |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1664 | IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1665 | get_cmd_string(trans_pcie, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1666 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1667 | cmd_idx = iwl_pcie_enqueue_hcmd(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1668 | if (cmd_idx < 0) { |
| 1669 | ret = cmd_idx; |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1670 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Johannes Berg | 721c32f | 2012-03-06 13:30:40 -0800 | [diff] [blame] | 1671 | IWL_ERR(trans, |
Todd Previte | b36b110 | 2011-11-10 06:55:02 -0800 | [diff] [blame] | 1672 | "Error sending %s: enqueue_hcmd failed: %d\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1673 | get_cmd_string(trans_pcie, cmd->id), ret); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1674 | return ret; |
| 1675 | } |
| 1676 | |
Emmanuel Grumbach | b943949 | 2013-12-22 15:09:40 +0200 | [diff] [blame] | 1677 | ret = wait_event_timeout(trans_pcie->wait_command_queue, |
| 1678 | !test_bit(STATUS_SYNC_HCMD_ACTIVE, |
| 1679 | &trans->status), |
| 1680 | HOST_COMPLETE_TIMEOUT); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1681 | if (!ret) { |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1682 | struct iwl_txq *txq = &trans_pcie->txq[trans_pcie->cmd_queue]; |
| 1683 | struct iwl_queue *q = &txq->q; |
Wey-Yi Guy | d10630a | 2011-10-10 07:26:46 -0700 | [diff] [blame] | 1684 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1685 | IWL_ERR(trans, "Error sending %s: time out after %dms.\n", |
| 1686 | get_cmd_string(trans_pcie, cmd->id), |
| 1687 | jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1688 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1689 | IWL_ERR(trans, "Current CMD queue read_ptr %d write_ptr %d\n", |
| 1690 | q->read_ptr, q->write_ptr); |
Wey-Yi Guy | d10630a | 2011-10-10 07:26:46 -0700 | [diff] [blame] | 1691 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1692 | clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1693 | IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", |
| 1694 | get_cmd_string(trans_pcie, cmd->id)); |
| 1695 | ret = -ETIMEDOUT; |
Emmanuel Grumbach | 42550a5 | 2013-09-11 14:16:20 +0300 | [diff] [blame] | 1696 | |
Liad Kaufman | 4c9706d | 2014-04-27 16:46:09 +0300 | [diff] [blame] | 1697 | iwl_force_nmi(trans); |
Arik Nemtsov | 2a988e9 | 2013-12-01 13:50:40 +0200 | [diff] [blame] | 1698 | iwl_trans_fw_error(trans); |
Emmanuel Grumbach | 42550a5 | 2013-09-11 14:16:20 +0300 | [diff] [blame] | 1699 | |
Johannes Berg | 6dde8c4 | 2013-10-31 18:30:38 +0100 | [diff] [blame] | 1700 | goto cancel; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1701 | } |
| 1702 | |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1703 | if (test_bit(STATUS_FW_ERROR, &trans->status)) { |
Johannes Berg | d18aa87 | 2012-11-06 16:36:21 +0100 | [diff] [blame] | 1704 | IWL_ERR(trans, "FW error in SYNC CMD %s\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1705 | get_cmd_string(trans_pcie, cmd->id)); |
Johannes Berg | b656fa3 | 2013-05-03 11:56:17 +0200 | [diff] [blame] | 1706 | dump_stack(); |
Johannes Berg | d18aa87 | 2012-11-06 16:36:21 +0100 | [diff] [blame] | 1707 | ret = -EIO; |
| 1708 | goto cancel; |
| 1709 | } |
| 1710 | |
Eran Harary | 1094fa2 | 2013-06-02 12:40:34 +0300 | [diff] [blame] | 1711 | if (!(cmd->flags & CMD_SEND_IN_RFKILL) && |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1712 | test_bit(STATUS_RFKILL, &trans->status)) { |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1713 | IWL_DEBUG_RF_KILL(trans, "RFKILL in SYNC CMD... no rsp\n"); |
| 1714 | ret = -ERFKILL; |
| 1715 | goto cancel; |
| 1716 | } |
| 1717 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1718 | if ((cmd->flags & CMD_WANT_SKB) && !cmd->resp_pkt) { |
Emmanuel Grumbach | 6d8f6ee | 2011-08-25 23:11:06 -0700 | [diff] [blame] | 1719 | IWL_ERR(trans, "Error: Response NULL in '%s'\n", |
Emmanuel Grumbach | 990aa6d | 2012-11-14 12:39:52 +0200 | [diff] [blame] | 1720 | get_cmd_string(trans_pcie, cmd->id)); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1721 | ret = -EIO; |
| 1722 | goto cancel; |
| 1723 | } |
| 1724 | |
| 1725 | return 0; |
| 1726 | |
| 1727 | cancel: |
| 1728 | if (cmd->flags & CMD_WANT_SKB) { |
| 1729 | /* |
| 1730 | * Cancel the CMD_WANT_SKB flag for the cmd in the |
| 1731 | * TX cmd queue. Otherwise in case the cmd comes |
| 1732 | * in later, it will possibly set an invalid |
| 1733 | * address (cmd->meta.source). |
| 1734 | */ |
Johannes Berg | bf8440e | 2012-03-19 17:12:06 +0100 | [diff] [blame] | 1735 | trans_pcie->txq[trans_pcie->cmd_queue]. |
| 1736 | entries[cmd_idx].meta.flags &= ~CMD_WANT_SKB; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1737 | } |
Emmanuel Grumbach | 9cac494 | 2011-11-10 06:55:20 -0800 | [diff] [blame] | 1738 | |
Johannes Berg | 65b94a4 | 2012-03-05 11:24:38 -0800 | [diff] [blame] | 1739 | if (cmd->resp_pkt) { |
| 1740 | iwl_free_resp(cmd); |
| 1741 | cmd->resp_pkt = NULL; |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1742 | } |
| 1743 | |
| 1744 | return ret; |
| 1745 | } |
| 1746 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1747 | 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] | 1748 | { |
Eran Harary | 4f59334 | 2013-05-13 07:53:26 +0300 | [diff] [blame] | 1749 | if (!(cmd->flags & CMD_SEND_IN_RFKILL) && |
Arik Nemtsov | eb7ff77 | 2013-12-01 12:30:38 +0200 | [diff] [blame] | 1750 | test_bit(STATUS_RFKILL, &trans->status)) { |
Emmanuel Grumbach | 754d7d9 | 2013-03-13 22:16:20 +0200 | [diff] [blame] | 1751 | IWL_DEBUG_RF_KILL(trans, "Dropping CMD 0x%x: RF KILL\n", |
| 1752 | cmd->id); |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1753 | return -ERFKILL; |
Emmanuel Grumbach | 754d7d9 | 2013-03-13 22:16:20 +0200 | [diff] [blame] | 1754 | } |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1755 | |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1756 | if (cmd->flags & CMD_ASYNC) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1757 | return iwl_pcie_send_hcmd_async(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1758 | |
Emmanuel Grumbach | f946b52 | 2012-10-25 17:25:52 +0200 | [diff] [blame] | 1759 | /* 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] | 1760 | return iwl_pcie_send_hcmd_sync(trans, cmd); |
Emmanuel Grumbach | 253a634 | 2011-07-11 07:39:46 -0700 | [diff] [blame] | 1761 | } |
| 1762 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1763 | int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, |
| 1764 | struct iwl_device_cmd *dev_cmd, int txq_id) |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1765 | { |
Emmanuel Grumbach | 8ad71be | 2011-08-25 23:11:32 -0700 | [diff] [blame] | 1766 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1767 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 1768 | struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
| 1769 | struct iwl_cmd_meta *out_meta; |
| 1770 | struct iwl_txq *txq; |
| 1771 | struct iwl_queue *q; |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1772 | dma_addr_t tb0_phys, tb1_phys, scratch_phys; |
| 1773 | void *tb1_addr; |
| 1774 | u16 len, tb1_len, tb2_len; |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 1775 | bool wait_write_ptr; |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1776 | __le16 fc = hdr->frame_control; |
| 1777 | u8 hdr_len = ieee80211_hdrlen(fc); |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 1778 | u16 wifi_seq; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1779 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1780 | txq = &trans_pcie->txq[txq_id]; |
| 1781 | q = &txq->q; |
Emmanuel Grumbach | 39644e9 | 2011-09-15 11:46:29 -0700 | [diff] [blame] | 1782 | |
Johannes Berg | 961de6a | 2013-07-04 18:00:08 +0200 | [diff] [blame] | 1783 | if (WARN_ONCE(!test_bit(txq_id, trans_pcie->queue_used), |
| 1784 | "TX on unused queue %d\n", txq_id)) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1785 | return -EINVAL; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1786 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1787 | spin_lock(&txq->lock); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1788 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1789 | /* In AGG mode, the index in the ring must correspond to the WiFi |
| 1790 | * sequence number. This is a HW requirements to help the SCD to parse |
| 1791 | * the BA. |
| 1792 | * Check here that the packets are in the right place on the ring. |
| 1793 | */ |
Johannes Berg | 9a88658 | 2013-02-15 19:25:00 +0100 | [diff] [blame] | 1794 | wifi_seq = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); |
Eliad Peller | 1092b9b | 2013-07-16 17:53:43 +0300 | [diff] [blame] | 1795 | WARN_ONCE(txq->ampdu && |
Johannes Berg | 68972c4 | 2013-06-11 19:05:27 +0200 | [diff] [blame] | 1796 | (wifi_seq & 0xff) != q->write_ptr, |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1797 | "Q: %d WiFi Seq %d tfdNum %d", |
| 1798 | txq_id, wifi_seq, q->write_ptr); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1799 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1800 | /* Set up driver data for this TFD */ |
| 1801 | txq->entries[q->write_ptr].skb = skb; |
| 1802 | txq->entries[q->write_ptr].cmd = dev_cmd; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1803 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1804 | dev_cmd->hdr.sequence = |
| 1805 | cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | |
| 1806 | INDEX_TO_SEQ(q->write_ptr))); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1807 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1808 | tb0_phys = iwl_pcie_get_scratchbuf_dma(txq, q->write_ptr); |
| 1809 | scratch_phys = tb0_phys + sizeof(struct iwl_cmd_header) + |
| 1810 | offsetof(struct iwl_tx_cmd, scratch); |
| 1811 | |
| 1812 | tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); |
| 1813 | tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); |
| 1814 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1815 | /* Set up first empty entry in queue's array of Tx/cmd buffers */ |
| 1816 | out_meta = &txq->entries[q->write_ptr].meta; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1817 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1818 | /* |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1819 | * The second TB (tb1) points to the remainder of the TX command |
| 1820 | * and the 802.11 header - dword aligned size |
| 1821 | * (This calculation modifies the TX command, so do it before the |
| 1822 | * setup of the first TB) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1823 | */ |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1824 | len = sizeof(struct iwl_tx_cmd) + sizeof(struct iwl_cmd_header) + |
| 1825 | hdr_len - IWL_HCMD_SCRATCHBUF_SIZE; |
Eliad Peller | 1092b9b | 2013-07-16 17:53:43 +0300 | [diff] [blame] | 1826 | tb1_len = ALIGN(len, 4); |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1827 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1828 | /* Tell NIC about any 2-byte padding after MAC header */ |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1829 | if (tb1_len != len) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1830 | tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; |
| 1831 | |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1832 | /* The first TB points to the scratchbuf data - min_copy bytes */ |
| 1833 | memcpy(&txq->scratchbufs[q->write_ptr], &dev_cmd->hdr, |
| 1834 | IWL_HCMD_SCRATCHBUF_SIZE); |
| 1835 | iwl_pcie_txq_build_tfd(trans, txq, tb0_phys, |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1836 | IWL_HCMD_SCRATCHBUF_SIZE, true); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1837 | |
| 1838 | /* there must be data left over for TB1 or this code must be changed */ |
| 1839 | BUILD_BUG_ON(sizeof(struct iwl_tx_cmd) < IWL_HCMD_SCRATCHBUF_SIZE); |
| 1840 | |
| 1841 | /* map the data for TB1 */ |
| 1842 | tb1_addr = ((u8 *)&dev_cmd->hdr) + IWL_HCMD_SCRATCHBUF_SIZE; |
| 1843 | tb1_phys = dma_map_single(trans->dev, tb1_addr, tb1_len, DMA_TO_DEVICE); |
| 1844 | if (unlikely(dma_mapping_error(trans->dev, tb1_phys))) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1845 | goto out_err; |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1846 | iwl_pcie_txq_build_tfd(trans, txq, tb1_phys, tb1_len, false); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1847 | |
| 1848 | /* |
| 1849 | * Set up TFD's third entry to point directly to remainder |
| 1850 | * of skb, if any (802.11 null frames have no payload). |
| 1851 | */ |
| 1852 | tb2_len = skb->len - hdr_len; |
| 1853 | if (tb2_len > 0) { |
| 1854 | dma_addr_t tb2_phys = dma_map_single(trans->dev, |
| 1855 | skb->data + hdr_len, |
| 1856 | tb2_len, DMA_TO_DEVICE); |
| 1857 | if (unlikely(dma_mapping_error(trans->dev, tb2_phys))) { |
| 1858 | iwl_pcie_tfd_unmap(trans, out_meta, |
| 1859 | &txq->tfds[q->write_ptr]); |
| 1860 | goto out_err; |
| 1861 | } |
Johannes Berg | 6d6e68f | 2014-04-23 19:00:56 +0200 | [diff] [blame] | 1862 | iwl_pcie_txq_build_tfd(trans, txq, tb2_phys, tb2_len, false); |
Johannes Berg | 38c0f334 | 2013-02-27 13:18:50 +0100 | [diff] [blame] | 1863 | } |
| 1864 | |
| 1865 | /* Set up entry for this TFD in Tx byte-count array */ |
| 1866 | iwl_pcie_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len)); |
| 1867 | |
| 1868 | trace_iwlwifi_dev_tx(trans->dev, skb, |
| 1869 | &txq->tfds[txq->q.write_ptr], |
| 1870 | sizeof(struct iwl_tfd), |
| 1871 | &dev_cmd->hdr, IWL_HCMD_SCRATCHBUF_SIZE + tb1_len, |
| 1872 | skb->data + hdr_len, tb2_len); |
| 1873 | trace_iwlwifi_dev_tx_data(trans->dev, skb, |
| 1874 | skb->data + hdr_len, tb2_len); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1875 | |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 1876 | wait_write_ptr = ieee80211_has_morefrags(fc); |
Johannes Berg | 7c5ba4a | 2012-04-09 17:46:54 -0700 | [diff] [blame] | 1877 | |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1878 | /* start timer if queue currently empty */ |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1879 | if (q->read_ptr == q->write_ptr) { |
Emmanuel Grumbach | 4cf677f | 2015-01-12 14:38:29 +0200 | [diff] [blame] | 1880 | if (txq->wd_timeout) |
| 1881 | mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout); |
Eliad Peller | 7616f33 | 2014-11-20 17:33:43 +0200 | [diff] [blame] | 1882 | IWL_DEBUG_RPM(trans, "Q: %d first tx - take ref\n", q->id); |
| 1883 | iwl_trans_pcie_ref(trans); |
| 1884 | } |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1885 | |
| 1886 | /* Tell device the write index *just past* this latest filled TFD */ |
Johannes Berg | 83f32a4 | 2014-04-24 09:57:40 +0200 | [diff] [blame] | 1887 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 1888 | if (!wait_write_ptr) |
| 1889 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1890 | |
| 1891 | /* |
| 1892 | * At this point the frame is "transmitted" successfully |
Johannes Berg | 43aa616 | 2014-02-27 14:24:36 +0100 | [diff] [blame] | 1893 | * and we will get a TX status notification eventually. |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1894 | */ |
| 1895 | if (iwl_queue_space(q) < q->high_mark) { |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 1896 | if (wait_write_ptr) |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1897 | iwl_pcie_txq_inc_wr_ptr(trans, txq); |
Johannes Berg | ea68f46 | 2014-02-27 14:36:55 +0100 | [diff] [blame] | 1898 | else |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1899 | iwl_stop_queue(trans, txq); |
Emmanuel Grumbach | f02831b | 2012-11-14 14:44:18 +0200 | [diff] [blame] | 1900 | } |
| 1901 | spin_unlock(&txq->lock); |
| 1902 | return 0; |
| 1903 | out_err: |
| 1904 | spin_unlock(&txq->lock); |
| 1905 | return -1; |
Emmanuel Grumbach | a0eaad7 | 2011-08-25 23:11:00 -0700 | [diff] [blame] | 1906 | } |