drivers/net/wireless/intel/iwlwifi/fw/smem.c

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  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  64 #include "iwl-drv.h"
  65 #include "runtime.h"
  66 #include "fw/api/commands.h"
  67
  68 static void iwl_parse_shared_mem_22000(struct iwl_fw_runtime *fwrt,
  69                                        struct iwl_rx_packet *pkt)
  70 {
  71         struct iwl_shared_mem_cfg *mem_cfg = (void *)pkt->data;
  72         int i, lmac;
  73         int lmac_num = le32_to_cpu(mem_cfg->lmac_num);
  74
  75         if (WARN_ON(lmac_num > ARRAY_SIZE(mem_cfg->lmac_smem)))
  76                 return;
  77
  78         fwrt->smem_cfg.num_lmacs = lmac_num;
  79         fwrt->smem_cfg.num_txfifo_entries =
  80                 ARRAY_SIZE(mem_cfg->lmac_smem[0].txfifo_size);
  81         fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo2_size);
  82
  83         for (lmac = 0; lmac < lmac_num; lmac++) {
  84                 struct iwl_shared_mem_lmac_cfg *lmac_cfg =
  85                         &mem_cfg->lmac_smem[lmac];
  86
  87                 for (i = 0; i < ARRAY_SIZE(lmac_cfg->txfifo_size); i++)
  88                         fwrt->smem_cfg.lmac[lmac].txfifo_size[i] =
  89                                 le32_to_cpu(lmac_cfg->txfifo_size[i]);
  90                 fwrt->smem_cfg.lmac[lmac].rxfifo1_size =
  91                         le32_to_cpu(lmac_cfg->rxfifo1_size);
  92         }
  93 }
  94
  95 static void iwl_parse_shared_mem(struct iwl_fw_runtime *fwrt,
  96                                  struct iwl_rx_packet *pkt)
  97 {
  98         struct iwl_shared_mem_cfg_v2 *mem_cfg = (void *)pkt->data;
  99         int i;
 100
 101         fwrt->smem_cfg.num_lmacs = 1;
 102
 103         fwrt->smem_cfg.num_txfifo_entries = ARRAY_SIZE(mem_cfg->txfifo_size);
 104         for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++)
 105                 fwrt->smem_cfg.lmac[0].txfifo_size[i] =
 106                         le32_to_cpu(mem_cfg->txfifo_size[i]);
 107
 108         fwrt->smem_cfg.lmac[0].rxfifo1_size =
 109                 le32_to_cpu(mem_cfg->rxfifo_size[0]);
 110         fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo_size[1]);
 111
 112         /* new API has more data, from rxfifo_addr field and on */
 113         if (fw_has_capa(&fwrt->fw->ucode_capa,
 114                         IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)) {
 115                 BUILD_BUG_ON(sizeof(fwrt->smem_cfg.internal_txfifo_size) !=
 116                              sizeof(mem_cfg->internal_txfifo_size));
 117
 118                 fwrt->smem_cfg.internal_txfifo_addr =
 119                         le32_to_cpu(mem_cfg->internal_txfifo_addr);
 120
 121                 for (i = 0;
 122                      i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
 123                      i++)
 124                         fwrt->smem_cfg.internal_txfifo_size[i] =
 125                                 le32_to_cpu(mem_cfg->internal_txfifo_size[i]);
 126         }
 127 }
 128
 129 void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
 130 {
 131         struct iwl_host_cmd cmd = {
 132                 .flags = CMD_WANT_SKB,
 133                 .data = { NULL, },
 134                 .len = { 0, },
 135         };
 136         struct iwl_rx_packet *pkt;
 137         int ret;
 138
 139         if (fw_has_capa(&fwrt->fw->ucode_capa,
 140                         IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG))
 141                 cmd.id = iwl_cmd_id(SHARED_MEM_CFG_CMD, SYSTEM_GROUP, 0);
 142         else
 143                 cmd.id = SHARED_MEM_CFG;
 144
 145         ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
 146
 147         if (ret) {
 148                 WARN(ret != -ERFKILL,
 149                      "Could not send the SMEM command: %d\n", ret);
 150                 return;
 151         }
 152
 153         pkt = cmd.resp_pkt;
 154         if (fwrt->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000)
 155                 iwl_parse_shared_mem_22000(fwrt, pkt);
 156         else
 157                 iwl_parse_shared_mem(fwrt, pkt);
 158
 159         IWL_DEBUG_INFO(fwrt, "SHARED MEM CFG: got memory offsets/sizes\n");
 160
 161         iwl_free_resp(&cmd);
 162 }
 163 IWL_EXPORT_SYMBOL(iwl_get_shared_mem_conf);