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

   1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2/*
   3 * Copyright (C) 2012-2014, 2018-2020 Intel Corporation
   4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6 */
   7#include "iwl-drv.h"
   8#include "runtime.h"
   9#include "fw/api/commands.h"
  10
  11static void iwl_parse_shared_mem_22000(struct iwl_fw_runtime *fwrt,
  12                                       struct iwl_rx_packet *pkt)
  13{
  14        struct iwl_shared_mem_cfg *mem_cfg = (void *)pkt->data;
  15        int i, lmac;
  16        int lmac_num = le32_to_cpu(mem_cfg->lmac_num);
  17        u8 api_ver = iwl_fw_lookup_notif_ver(fwrt->fw, SYSTEM_GROUP,
  18                                             SHARED_MEM_CFG_CMD, 0);
  19
  20        if (WARN_ON(lmac_num > ARRAY_SIZE(mem_cfg->lmac_smem)))
  21                return;
  22
  23        fwrt->smem_cfg.num_lmacs = lmac_num;
  24        fwrt->smem_cfg.num_txfifo_entries =
  25                ARRAY_SIZE(mem_cfg->lmac_smem[0].txfifo_size);
  26        fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo2_size);
  27
  28        if (api_ver >= 4 &&
  29            !WARN_ON_ONCE(iwl_rx_packet_payload_len(pkt) < sizeof(*mem_cfg))) {
  30                fwrt->smem_cfg.rxfifo2_control_size =
  31                        le32_to_cpu(mem_cfg->rxfifo2_control_size);
  32        }
  33
  34        for (lmac = 0; lmac < lmac_num; lmac++) {
  35                struct iwl_shared_mem_lmac_cfg *lmac_cfg =
  36                        &mem_cfg->lmac_smem[lmac];
  37
  38                for (i = 0; i < ARRAY_SIZE(lmac_cfg->txfifo_size); i++)
  39                        fwrt->smem_cfg.lmac[lmac].txfifo_size[i] =
  40                                le32_to_cpu(lmac_cfg->txfifo_size[i]);
  41                fwrt->smem_cfg.lmac[lmac].rxfifo1_size =
  42                        le32_to_cpu(lmac_cfg->rxfifo1_size);
  43        }
  44}
  45
  46static void iwl_parse_shared_mem(struct iwl_fw_runtime *fwrt,
  47                                 struct iwl_rx_packet *pkt)
  48{
  49        struct iwl_shared_mem_cfg_v2 *mem_cfg = (void *)pkt->data;
  50        int i;
  51
  52        fwrt->smem_cfg.num_lmacs = 1;
  53
  54        fwrt->smem_cfg.num_txfifo_entries = ARRAY_SIZE(mem_cfg->txfifo_size);
  55        for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++)
  56                fwrt->smem_cfg.lmac[0].txfifo_size[i] =
  57                        le32_to_cpu(mem_cfg->txfifo_size[i]);
  58
  59        fwrt->smem_cfg.lmac[0].rxfifo1_size =
  60                le32_to_cpu(mem_cfg->rxfifo_size[0]);
  61        fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo_size[1]);
  62
  63        /* new API has more data, from rxfifo_addr field and on */
  64        if (fw_has_capa(&fwrt->fw->ucode_capa,
  65                        IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)) {
  66                BUILD_BUG_ON(sizeof(fwrt->smem_cfg.internal_txfifo_size) !=
  67                             sizeof(mem_cfg->internal_txfifo_size));
  68
  69                fwrt->smem_cfg.internal_txfifo_addr =
  70                        le32_to_cpu(mem_cfg->internal_txfifo_addr);
  71
  72                for (i = 0;
  73                     i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
  74                     i++)
  75                        fwrt->smem_cfg.internal_txfifo_size[i] =
  76                                le32_to_cpu(mem_cfg->internal_txfifo_size[i]);
  77        }
  78}
  79
  80void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
  81{
  82        struct iwl_host_cmd cmd = {
  83                .flags = CMD_WANT_SKB,
  84                .data = { NULL, },
  85                .len = { 0, },
  86        };
  87        struct iwl_rx_packet *pkt;
  88        int ret;
  89
  90        if (fw_has_capa(&fwrt->fw->ucode_capa,
  91                        IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG))
  92                cmd.id = iwl_cmd_id(SHARED_MEM_CFG_CMD, SYSTEM_GROUP, 0);
  93        else
  94                cmd.id = SHARED_MEM_CFG;
  95
  96        ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
  97
  98        if (ret) {
  99                WARN(ret != -ERFKILL,
 100                     "Could not send the SMEM command: %d\n", ret);
 101                return;
 102        }
 103
 104        pkt = cmd.resp_pkt;
 105        if (fwrt->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000)
 106                iwl_parse_shared_mem_22000(fwrt, pkt);
 107        else
 108                iwl_parse_shared_mem(fwrt, pkt);
 109
 110        IWL_DEBUG_INFO(fwrt, "SHARED MEM CFG: got memory offsets/sizes\n");
 111
 112        iwl_free_resp(&cmd);
 113}
 114IWL_EXPORT_SYMBOL(iwl_get_shared_mem_conf);
 115