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