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 htt->max_throughput_mbps = 800; 57 58 /* 59 * Prefetch enough data to satisfy target 60 * classification engine. 61 * This is for LL chips. HL chips will probably 62 * transfer all frame in the tx fragment. 63 */ 64 htt->prefetch_len = 65 36 + /* 802.11 + qos + ht */ 66 4 + /* 802.1q */ 67 8 + /* llc snap */ 68 2; /* ip4 dscp or ip6 priority */ 69 70 return 0; 71 } 72 73 #define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ) 74 75 static int ath10k_htt_verify_version(struct ath10k_htt *htt) 76 { 77 ath10k_dbg(ATH10K_DBG_BOOT, "htt target version %d.%d\n", 78 htt->target_version_major, htt->target_version_minor); 79 80 if (htt->target_version_major != 2 && 81 htt->target_version_major != 3) { 82 ath10k_err("unsupported htt major version %d. supported versions are 2 and 3\n", 83 htt->target_version_major); 84 return -ENOTSUPP; 85 } 86 87 return 0; 88 } 89 90 int ath10k_htt_setup(struct ath10k_htt *htt) 91 { 92 int status; 93 94 init_completion(&htt->target_version_received); 95 96 status = ath10k_htt_h2t_ver_req_msg(htt); 97 if (status) 98 return status; 99 100 status = wait_for_completion_timeout(&htt->target_version_received, 101 HTT_TARGET_VERSION_TIMEOUT_HZ); 102 if (status <= 0) { 103 ath10k_warn("htt version request timed out\n"); 104 return -ETIMEDOUT; 105 } 106 107 status = ath10k_htt_verify_version(htt); 108 if (status) 109 return status; 110 111 return ath10k_htt_send_rx_ring_cfg_ll(htt); 112 } 113