1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2015 Intel Mobile Communications GmbH 4 * Copyright (C) 2016-2017 Intel Deutschland GmbH 5 * Copyright (C) 2019-2020 Intel Corporation 6 */ 7 #include <linux/kernel.h> 8 #include <linux/bsearch.h> 9 10 #include "fw/api/tx.h" 11 #include "iwl-trans.h" 12 #include "iwl-drv.h" 13 #include "iwl-fh.h" 14 #include "queue/tx.h" 15 #include <linux/dmapool.h> 16 17 struct iwl_trans *iwl_trans_alloc(unsigned int priv_size, 18 struct device *dev, 19 const struct iwl_trans_ops *ops, 20 const struct iwl_cfg_trans_params *cfg_trans) 21 { 22 struct iwl_trans *trans; 23 int txcmd_size, txcmd_align; 24 #ifdef CONFIG_LOCKDEP 25 static struct lock_class_key __key; 26 #endif 27 28 trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL); 29 if (!trans) 30 return NULL; 31 32 trans->trans_cfg = cfg_trans; 33 if (!cfg_trans->gen2) { 34 txcmd_size = sizeof(struct iwl_tx_cmd); 35 txcmd_align = sizeof(void *); 36 } else if (cfg_trans->device_family < IWL_DEVICE_FAMILY_AX210) { 37 txcmd_size = sizeof(struct iwl_tx_cmd_gen2); 38 txcmd_align = 64; 39 } else { 40 txcmd_size = sizeof(struct iwl_tx_cmd_gen3); 41 txcmd_align = 128; 42 } 43 44 txcmd_size += sizeof(struct iwl_cmd_header); 45 txcmd_size += 36; /* biggest possible 802.11 header */ 46 47 /* Ensure device TX cmd cannot reach/cross a page boundary in gen2 */ 48 if (WARN_ON(cfg_trans->gen2 && txcmd_size >= txcmd_align)) 49 return ERR_PTR(-EINVAL); 50 51 #ifdef CONFIG_LOCKDEP 52 lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map", 53 &__key, 0); 54 #endif 55 56 trans->dev = dev; 57 trans->ops = ops; 58 trans->num_rx_queues = 1; 59 60 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 61 trans->txqs.bc_tbl_size = sizeof(struct iwl_gen3_bc_tbl); 62 else 63 trans->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl); 64 /* 65 * For gen2 devices, we use a single allocation for each byte-count 66 * table, but they're pretty small (1k) so use a DMA pool that we 67 * allocate here. 68 */ 69 if (trans->trans_cfg->gen2) { 70 trans->txqs.bc_pool = dmam_pool_create("iwlwifi:bc", dev, 71 trans->txqs.bc_tbl_size, 72 256, 0); 73 if (!trans->txqs.bc_pool) 74 return NULL; 75 } 76 77 if (trans->trans_cfg->use_tfh) { 78 trans->txqs.tfd.addr_size = 64; 79 trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS; 80 trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd); 81 } else { 82 trans->txqs.tfd.addr_size = 36; 83 trans->txqs.tfd.max_tbs = IWL_NUM_OF_TBS; 84 trans->txqs.tfd.size = sizeof(struct iwl_tfd); 85 } 86 trans->max_skb_frags = IWL_TRANS_MAX_FRAGS(trans); 87 88 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name), 89 "iwl_cmd_pool:%s", dev_name(trans->dev)); 90 trans->dev_cmd_pool = 91 kmem_cache_create(trans->dev_cmd_pool_name, 92 txcmd_size, txcmd_align, 93 SLAB_HWCACHE_ALIGN, NULL); 94 if (!trans->dev_cmd_pool) 95 return NULL; 96 97 WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty); 98 99 trans->txqs.tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page); 100 if (!trans->txqs.tso_hdr_page) { 101 kmem_cache_destroy(trans->dev_cmd_pool); 102 return NULL; 103 } 104 105 return trans; 106 } 107 108 void iwl_trans_free(struct iwl_trans *trans) 109 { 110 int i; 111 112 for_each_possible_cpu(i) { 113 struct iwl_tso_hdr_page *p = 114 per_cpu_ptr(trans->txqs.tso_hdr_page, i); 115 116 if (p->page) 117 __free_page(p->page); 118 } 119 120 free_percpu(trans->txqs.tso_hdr_page); 121 122 kmem_cache_destroy(trans->dev_cmd_pool); 123 } 124 125 int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd) 126 { 127 int ret; 128 129 if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) && 130 test_bit(STATUS_RFKILL_OPMODE, &trans->status))) 131 return -ERFKILL; 132 133 /* 134 * We can't test IWL_MVM_STATUS_IN_D3 in mvm->status because this 135 * bit is set early in the D3 flow, before we send all the commands 136 * that configure the firmware for D3 operation (power, patterns, ...) 137 * and we don't want to flag all those with CMD_SEND_IN_D3. 138 * So use the system_pm_mode instead. The only command sent after 139 * we set system_pm_mode is D3_CONFIG_CMD, which we now flag with 140 * CMD_SEND_IN_D3. 141 */ 142 if (unlikely(trans->system_pm_mode == IWL_PLAT_PM_MODE_D3 && 143 !(cmd->flags & CMD_SEND_IN_D3))) 144 return -EHOSTDOWN; 145 146 if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) 147 return -EIO; 148 149 if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) { 150 IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); 151 return -EIO; 152 } 153 154 if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) && 155 !(cmd->flags & CMD_ASYNC))) 156 return -EINVAL; 157 158 if (!(cmd->flags & CMD_ASYNC)) 159 lock_map_acquire_read(&trans->sync_cmd_lockdep_map); 160 161 if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id)) 162 cmd->id = DEF_ID(cmd->id); 163 164 ret = trans->ops->send_cmd(trans, cmd); 165 166 if (!(cmd->flags & CMD_ASYNC)) 167 lock_map_release(&trans->sync_cmd_lockdep_map); 168 169 if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt)) 170 return -EIO; 171 172 return ret; 173 } 174 IWL_EXPORT_SYMBOL(iwl_trans_send_cmd); 175 176 /* Comparator for struct iwl_hcmd_names. 177 * Used in the binary search over a list of host commands. 178 * 179 * @key: command_id that we're looking for. 180 * @elt: struct iwl_hcmd_names candidate for match. 181 * 182 * @return 0 iff equal. 183 */ 184 static int iwl_hcmd_names_cmp(const void *key, const void *elt) 185 { 186 const struct iwl_hcmd_names *name = elt; 187 u8 cmd1 = *(u8 *)key; 188 u8 cmd2 = name->cmd_id; 189 190 return (cmd1 - cmd2); 191 } 192 193 const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id) 194 { 195 u8 grp, cmd; 196 struct iwl_hcmd_names *ret; 197 const struct iwl_hcmd_arr *arr; 198 size_t size = sizeof(struct iwl_hcmd_names); 199 200 grp = iwl_cmd_groupid(id); 201 cmd = iwl_cmd_opcode(id); 202 203 if (!trans->command_groups || grp >= trans->command_groups_size || 204 !trans->command_groups[grp].arr) 205 return "UNKNOWN"; 206 207 arr = &trans->command_groups[grp]; 208 ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp); 209 if (!ret) 210 return "UNKNOWN"; 211 return ret->cmd_name; 212 } 213 IWL_EXPORT_SYMBOL(iwl_get_cmd_string); 214 215 int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans) 216 { 217 int i, j; 218 const struct iwl_hcmd_arr *arr; 219 220 for (i = 0; i < trans->command_groups_size; i++) { 221 arr = &trans->command_groups[i]; 222 if (!arr->arr) 223 continue; 224 for (j = 0; j < arr->size - 1; j++) 225 if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id) 226 return -1; 227 } 228 return 0; 229 } 230 IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted); 231