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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2012-2014, 2018-2021, 2025-2026 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
#include "iwl-drv.h"
#include "runtime.h"
#include "dbg.h"
#include "fw/api/commands.h"
static void iwl_parse_shared_mem_22000(struct iwl_fw_runtime *fwrt,
struct iwl_rx_packet *pkt)
{
struct iwl_shared_mem_cfg *mem_cfg = (void *)pkt->data;
int i, lmac;
int lmac_num;
u8 api_ver;
if (IWL_FW_CHECK(fwrt, iwl_rx_packet_payload_len(pkt) <
offsetofend(struct iwl_shared_mem_cfg, lmac_smem[1]),
"bad shared mem notification size\n"))
return;
lmac_num = le32_to_cpu(mem_cfg->lmac_num);
api_ver = iwl_fw_lookup_notif_ver(fwrt->fw, SYSTEM_GROUP,
SHARED_MEM_CFG_CMD, 0);
/* Note: notification has 3 entries, but we only expect 2 */
if (IWL_FW_CHECK(fwrt, lmac_num > ARRAY_SIZE(fwrt->smem_cfg.lmac),
"FW advertises %d LMACs\n", lmac_num))
return;
fwrt->smem_cfg.num_lmacs = lmac_num;
fwrt->smem_cfg.num_txfifo_entries =
ARRAY_SIZE(mem_cfg->lmac_smem[0].txfifo_size);
fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo2_size);
if (api_ver >= 4 &&
!IWL_FW_CHECK(fwrt, iwl_rx_packet_payload_len(pkt) < sizeof(*mem_cfg),
"bad shared mem notification size (v4)\n")) {
fwrt->smem_cfg.rxfifo2_control_size =
le32_to_cpu(mem_cfg->rxfifo2_control_size);
}
for (lmac = 0; lmac < lmac_num; lmac++) {
struct iwl_shared_mem_lmac_cfg *lmac_cfg =
&mem_cfg->lmac_smem[lmac];
for (i = 0; i < ARRAY_SIZE(lmac_cfg->txfifo_size); i++)
fwrt->smem_cfg.lmac[lmac].txfifo_size[i] =
le32_to_cpu(lmac_cfg->txfifo_size[i]);
fwrt->smem_cfg.lmac[lmac].rxfifo1_size =
le32_to_cpu(lmac_cfg->rxfifo1_size);
}
}
static void iwl_parse_shared_mem(struct iwl_fw_runtime *fwrt,
struct iwl_rx_packet *pkt)
{
struct iwl_shared_mem_cfg_v2 *mem_cfg = (void *)pkt->data;
int i;
if (IWL_FW_CHECK(fwrt, iwl_rx_packet_payload_len(pkt) <
offsetof(struct iwl_shared_mem_cfg_v2, rxfifo_addr),
"bad shared mem notification size\n"))
return;
fwrt->smem_cfg.num_lmacs = 1;
fwrt->smem_cfg.num_txfifo_entries = ARRAY_SIZE(mem_cfg->txfifo_size);
for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++)
fwrt->smem_cfg.lmac[0].txfifo_size[i] =
le32_to_cpu(mem_cfg->txfifo_size[i]);
fwrt->smem_cfg.lmac[0].rxfifo1_size =
le32_to_cpu(mem_cfg->rxfifo_size[0]);
fwrt->smem_cfg.rxfifo2_size = le32_to_cpu(mem_cfg->rxfifo_size[1]);
/* new API has more data, from rxfifo_addr field and on */
if (fw_has_capa(&fwrt->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)) {
if (IWL_FW_CHECK(fwrt, iwl_rx_packet_payload_len(pkt) <
sizeof(*mem_cfg),
"bad shared mem notification size (extend)\n"))
return;
BUILD_BUG_ON(sizeof(fwrt->smem_cfg.internal_txfifo_size) !=
sizeof(mem_cfg->internal_txfifo_size));
fwrt->smem_cfg.internal_txfifo_addr =
le32_to_cpu(mem_cfg->internal_txfifo_addr);
for (i = 0;
i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
i++)
fwrt->smem_cfg.internal_txfifo_size[i] =
le32_to_cpu(mem_cfg->internal_txfifo_size[i]);
}
}
void iwl_get_shared_mem_conf(struct iwl_fw_runtime *fwrt)
{
struct iwl_host_cmd cmd = {
.flags = CMD_WANT_SKB,
.data = { NULL, },
.len = { 0, },
};
struct iwl_rx_packet *pkt;
int ret;
if (fw_has_capa(&fwrt->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG))
cmd.id = WIDE_ID(SYSTEM_GROUP, SHARED_MEM_CFG_CMD);
else
cmd.id = SHARED_MEM_CFG;
ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
if (ret) {
WARN(ret != -ERFKILL,
"Could not send the SMEM command: %d\n", ret);
return;
}
pkt = cmd.resp_pkt;
if (fwrt->trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_22000)
iwl_parse_shared_mem_22000(fwrt, pkt);
else
iwl_parse_shared_mem(fwrt, pkt);
IWL_DEBUG_INFO(fwrt, "SHARED MEM CFG: got memory offsets/sizes\n");
iwl_free_resp(&cmd);
}
IWL_EXPORT_SYMBOL(iwl_get_shared_mem_conf);
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