xref: /openbmc/linux/drivers/net/wireless/ath/ath10k/htt.c (revision d7a3d85e)
1 /*
2  * Copyright (c) 2005-2011 Atheros Communications Inc.
3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <linux/slab.h>
19 #include <linux/if_ether.h>
20 
21 #include "htt.h"
22 #include "core.h"
23 #include "debug.h"
24 
25 int ath10k_htt_connect(struct ath10k_htt *htt)
26 {
27 	struct ath10k_htc_svc_conn_req conn_req;
28 	struct ath10k_htc_svc_conn_resp conn_resp;
29 	int status;
30 
31 	memset(&conn_req, 0, sizeof(conn_req));
32 	memset(&conn_resp, 0, sizeof(conn_resp));
33 
34 	conn_req.ep_ops.ep_tx_complete = ath10k_htt_htc_tx_complete;
35 	conn_req.ep_ops.ep_rx_complete = ath10k_htt_t2h_msg_handler;
36 
37 	/* connect to control service */
38 	conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_DATA_MSG;
39 
40 	status = ath10k_htc_connect_service(&htt->ar->htc, &conn_req,
41 					    &conn_resp);
42 
43 	if (status)
44 		return status;
45 
46 	htt->eid = conn_resp.eid;
47 
48 	return 0;
49 }
50 
51 int ath10k_htt_init(struct ath10k *ar)
52 {
53 	struct ath10k_htt *htt = &ar->htt;
54 
55 	htt->ar = ar;
56 
57 	/*
58 	 * Prefetch enough data to satisfy target
59 	 * classification engine.
60 	 * This is for LL chips. HL chips will probably
61 	 * transfer all frame in the tx fragment.
62 	 */
63 	htt->prefetch_len =
64 		36 + /* 802.11 + qos + ht */
65 		4 + /* 802.1q */
66 		8 + /* llc snap */
67 		2; /* ip4 dscp or ip6 priority */
68 
69 	return 0;
70 }
71 
72 #define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ)
73 
74 static int ath10k_htt_verify_version(struct ath10k_htt *htt)
75 {
76 	struct ath10k *ar = htt->ar;
77 
78 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt target version %d.%d\n",
79 		   htt->target_version_major, htt->target_version_minor);
80 
81 	if (htt->target_version_major != 2 &&
82 	    htt->target_version_major != 3) {
83 		ath10k_err(ar, "unsupported htt major version %d. supported versions are 2 and 3\n",
84 			   htt->target_version_major);
85 		return -ENOTSUPP;
86 	}
87 
88 	return 0;
89 }
90 
91 int ath10k_htt_setup(struct ath10k_htt *htt)
92 {
93 	struct ath10k *ar = htt->ar;
94 	int status;
95 
96 	init_completion(&htt->target_version_received);
97 
98 	status = ath10k_htt_h2t_ver_req_msg(htt);
99 	if (status)
100 		return status;
101 
102 	status = wait_for_completion_timeout(&htt->target_version_received,
103 					     HTT_TARGET_VERSION_TIMEOUT_HZ);
104 	if (status == 0) {
105 		ath10k_warn(ar, "htt version request timed out\n");
106 		return -ETIMEDOUT;
107 	}
108 
109 	status = ath10k_htt_verify_version(htt);
110 	if (status)
111 		return status;
112 
113 	return ath10k_htt_send_rx_ring_cfg_ll(htt);
114 }
115