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 20 #include "htt.h" 21 #include "core.h" 22 #include "debug.h" 23 24 static int ath10k_htt_htc_attach(struct ath10k_htt *htt) 25 { 26 struct ath10k_htc_svc_conn_req conn_req; 27 struct ath10k_htc_svc_conn_resp conn_resp; 28 int status; 29 30 memset(&conn_req, 0, sizeof(conn_req)); 31 memset(&conn_resp, 0, sizeof(conn_resp)); 32 33 conn_req.ep_ops.ep_tx_complete = ath10k_htt_htc_tx_complete; 34 conn_req.ep_ops.ep_rx_complete = ath10k_htt_t2h_msg_handler; 35 36 /* connect to control service */ 37 conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_DATA_MSG; 38 39 status = ath10k_htc_connect_service(htt->ar->htc, &conn_req, 40 &conn_resp); 41 42 if (status) 43 return status; 44 45 htt->eid = conn_resp.eid; 46 47 return 0; 48 } 49 50 struct ath10k_htt *ath10k_htt_attach(struct ath10k *ar) 51 { 52 struct ath10k_htt *htt; 53 int ret; 54 55 htt = kzalloc(sizeof(*htt), GFP_KERNEL); 56 if (!htt) 57 return NULL; 58 59 htt->ar = ar; 60 htt->max_throughput_mbps = 800; 61 62 /* 63 * Connect to HTC service. 64 * This has to be done before calling ath10k_htt_rx_attach, 65 * since ath10k_htt_rx_attach involves sending a rx ring configure 66 * message to the target. 67 */ 68 if (ath10k_htt_htc_attach(htt)) 69 goto err_htc_attach; 70 71 ret = ath10k_htt_tx_attach(htt); 72 if (ret) { 73 ath10k_err("could not attach htt tx (%d)\n", ret); 74 goto err_htc_attach; 75 } 76 77 if (ath10k_htt_rx_attach(htt)) 78 goto err_rx_attach; 79 80 /* 81 * Prefetch enough data to satisfy target 82 * classification engine. 83 * This is for LL chips. HL chips will probably 84 * transfer all frame in the tx fragment. 85 */ 86 htt->prefetch_len = 87 36 + /* 802.11 + qos + ht */ 88 4 + /* 802.1q */ 89 8 + /* llc snap */ 90 2; /* ip4 dscp or ip6 priority */ 91 92 return htt; 93 94 err_rx_attach: 95 ath10k_htt_tx_detach(htt); 96 err_htc_attach: 97 kfree(htt); 98 return NULL; 99 } 100 101 #define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ) 102 103 static int ath10k_htt_verify_version(struct ath10k_htt *htt) 104 { 105 ath10k_dbg(ATH10K_DBG_HTT, 106 "htt target version %d.%d; host version %d.%d\n", 107 htt->target_version_major, 108 htt->target_version_minor, 109 HTT_CURRENT_VERSION_MAJOR, 110 HTT_CURRENT_VERSION_MINOR); 111 112 if (htt->target_version_major != HTT_CURRENT_VERSION_MAJOR) { 113 ath10k_err("htt major versions are incompatible!\n"); 114 return -ENOTSUPP; 115 } 116 117 if (htt->target_version_minor != HTT_CURRENT_VERSION_MINOR) 118 ath10k_warn("htt minor version differ but still compatible\n"); 119 120 return 0; 121 } 122 123 int ath10k_htt_attach_target(struct ath10k_htt *htt) 124 { 125 int status; 126 127 init_completion(&htt->target_version_received); 128 129 status = ath10k_htt_h2t_ver_req_msg(htt); 130 if (status) 131 return status; 132 133 status = wait_for_completion_timeout(&htt->target_version_received, 134 HTT_TARGET_VERSION_TIMEOUT_HZ); 135 if (status <= 0) { 136 ath10k_warn("htt version request timed out\n"); 137 return -ETIMEDOUT; 138 } 139 140 status = ath10k_htt_verify_version(htt); 141 if (status) 142 return status; 143 144 return ath10k_htt_send_rx_ring_cfg_ll(htt); 145 } 146 147 void ath10k_htt_detach(struct ath10k_htt *htt) 148 { 149 ath10k_htt_rx_detach(htt); 150 ath10k_htt_tx_detach(htt); 151 kfree(htt); 152 } 153