1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2015 Intel Mobile Communications GmbH 9 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 10 * Copyright(c) 2019 - 2020 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2015 Intel Mobile Communications GmbH 31 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 32 * Copyright(c) 2019 - 2020 Intel Corporation 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include <linux/kernel.h> 63 #include <linux/bsearch.h> 64 65 #include "fw/api/tx.h" 66 #include "iwl-trans.h" 67 #include "iwl-drv.h" 68 #include "iwl-fh.h" 69 #include <linux/dmapool.h> 70 71 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size, 72 struct device *dev, 73 const struct iwl_trans_ops *ops, 74 const struct iwl_cfg_trans_params *cfg_trans) 75 { 76 struct iwl_trans *trans; 77 int txcmd_size, txcmd_align; 78 #ifdef CONFIG_LOCKDEP 79 static struct lock_class_key __key; 80 #endif 81 82 trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL); 83 if (!trans) 84 return NULL; 85 86 trans->trans_cfg = cfg_trans; 87 if (!cfg_trans->gen2) { 88 txcmd_size = sizeof(struct iwl_tx_cmd); 89 txcmd_align = sizeof(void *); 90 } else if (cfg_trans->device_family < IWL_DEVICE_FAMILY_AX210) { 91 txcmd_size = sizeof(struct iwl_tx_cmd_gen2); 92 txcmd_align = 64; 93 } else { 94 txcmd_size = sizeof(struct iwl_tx_cmd_gen3); 95 txcmd_align = 128; 96 } 97 98 txcmd_size += sizeof(struct iwl_cmd_header); 99 txcmd_size += 36; /* biggest possible 802.11 header */ 100 101 /* Ensure device TX cmd cannot reach/cross a page boundary in gen2 */ 102 if (WARN_ON(cfg_trans->gen2 && txcmd_size >= txcmd_align)) 103 return ERR_PTR(-EINVAL); 104 105 #ifdef CONFIG_LOCKDEP 106 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map", 107 &__key, 0); 108 #endif 109 110 trans->dev = dev; 111 trans->ops = ops; 112 trans->num_rx_queues = 1; 113 114 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 115 trans->txqs.bc_tbl_size = sizeof(struct iwl_gen3_bc_tbl); 116 else 117 trans->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl); 118 /* 119 * For gen2 devices, we use a single allocation for each byte-count 120 * table, but they're pretty small (1k) so use a DMA pool that we 121 * allocate here. 122 */ 123 if (trans->trans_cfg->gen2) { 124 trans->txqs.bc_pool = dmam_pool_create("iwlwifi:bc", dev, 125 trans->txqs.bc_tbl_size, 126 256, 0); 127 if (!trans->txqs.bc_pool) 128 return NULL; 129 } 130 131 if (trans->trans_cfg->use_tfh) { 132 trans->txqs.tfd.addr_size = 64; 133 trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS; 134 trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd); 135 } else { 136 trans->txqs.tfd.addr_size = 36; 137 trans->txqs.tfd.max_tbs = IWL_NUM_OF_TBS; 138 trans->txqs.tfd.size = sizeof(struct iwl_tfd); 139 } 140 trans->max_skb_frags = IWL_TRANS_MAX_FRAGS(trans); 141 142 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name), 143 "iwl_cmd_pool:%s", dev_name(trans->dev)); 144 trans->dev_cmd_pool = 145 kmem_cache_create(trans->dev_cmd_pool_name, 146 txcmd_size, txcmd_align, 147 SLAB_HWCACHE_ALIGN, NULL); 148 if (!trans->dev_cmd_pool) 149 return NULL; 150 151 WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty); 152 153 return trans; 154 } 155 156 void iwl_trans_free(struct iwl_trans *trans) 157 { 158 kmem_cache_destroy(trans->dev_cmd_pool); 159 } 160 161 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) 162 { 163 int ret; 164 165 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) && 166 test_bit(STATUS_RFKILL_OPMODE, &trans->status))) 167 return -ERFKILL; 168 169 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) 170 return -EIO; 171 172 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) { 173 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 174 return -EIO; 175 } 176 177 if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) && 178 !(cmd->flags & CMD_ASYNC))) 179 return -EINVAL; 180 181 if (!(cmd->flags & CMD_ASYNC)) 182 lock_map_acquire_read(&trans->sync_cmd_lockdep_map); 183 184 if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id)) 185 cmd->id = DEF_ID(cmd->id); 186 187 ret = trans->ops->send_cmd(trans, cmd); 188 189 if (!(cmd->flags & CMD_ASYNC)) 190 lock_map_release(&trans->sync_cmd_lockdep_map); 191 192 if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt)) 193 return -EIO; 194 195 return ret; 196 } 197 IWL_EXPORT_SYMBOL(iwl_trans_send_cmd); 198 199 /* Comparator for struct iwl_hcmd_names. 200 * Used in the binary search over a list of host commands. 201 * 202 * @key: command_id that we're looking for. 203 * @elt: struct iwl_hcmd_names candidate for match. 204 * 205 * @return 0 iff equal. 206 */ 207 static int iwl_hcmd_names_cmp(const void *key, const void *elt) 208 { 209 const struct iwl_hcmd_names *name = elt; 210 u8 cmd1 = *(u8 *)key; 211 u8 cmd2 = name->cmd_id; 212 213 return (cmd1 - cmd2); 214 } 215 216 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id) 217 { 218 u8 grp, cmd; 219 struct iwl_hcmd_names *ret; 220 const struct iwl_hcmd_arr *arr; 221 size_t size = sizeof(struct iwl_hcmd_names); 222 223 grp = iwl_cmd_groupid(id); 224 cmd = iwl_cmd_opcode(id); 225 226 if (!trans->command_groups || grp >= trans->command_groups_size || 227 !trans->command_groups[grp].arr) 228 return "UNKNOWN"; 229 230 arr = &trans->command_groups[grp]; 231 ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp); 232 if (!ret) 233 return "UNKNOWN"; 234 return ret->cmd_name; 235 } 236 IWL_EXPORT_SYMBOL(iwl_get_cmd_string); 237 238 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans) 239 { 240 int i, j; 241 const struct iwl_hcmd_arr *arr; 242 243 for (i = 0; i < trans->command_groups_size; i++) { 244 arr = &trans->command_groups[i]; 245 if (!arr->arr) 246 continue; 247 for (j = 0; j < arr->size - 1; j++) 248 if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id) 249 return -1; 250 } 251 return 0; 252 } 253 IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted); 254