1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2021 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 
11 static 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 
46 static 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 
80 void 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 = WIDE_ID(SYSTEM_GROUP, SHARED_MEM_CFG_CMD);
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 }
114 IWL_EXPORT_SYMBOL(iwl_get_shared_mem_conf);
115