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