/* * Copyright (c) 2005-2011 Atheros Communications Inc. * Copyright (c) 2011-2013 Qualcomm Atheros, Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include "htt.h" #include "core.h" #include "debug.h" static int ath10k_htt_htc_attach(struct ath10k_htt *htt) { struct ath10k_htc_svc_conn_req conn_req; struct ath10k_htc_svc_conn_resp conn_resp; int status; memset(&conn_req, 0, sizeof(conn_req)); memset(&conn_resp, 0, sizeof(conn_resp)); conn_req.ep_ops.ep_tx_complete = ath10k_htt_htc_tx_complete; conn_req.ep_ops.ep_rx_complete = ath10k_htt_t2h_msg_handler; /* connect to control service */ conn_req.service_id = ATH10K_HTC_SVC_ID_HTT_DATA_MSG; status = ath10k_htc_connect_service(htt->ar->htc, &conn_req, &conn_resp); if (status) return status; htt->eid = conn_resp.eid; return 0; } struct ath10k_htt *ath10k_htt_attach(struct ath10k *ar) { struct ath10k_htt *htt; int ret; htt = kzalloc(sizeof(*htt), GFP_KERNEL); if (!htt) return NULL; htt->ar = ar; htt->max_throughput_mbps = 800; /* * Connect to HTC service. * This has to be done before calling ath10k_htt_rx_attach, * since ath10k_htt_rx_attach involves sending a rx ring configure * message to the target. */ if (ath10k_htt_htc_attach(htt)) goto err_htc_attach; ret = ath10k_htt_tx_attach(htt); if (ret) { ath10k_err("could not attach htt tx (%d)\n", ret); goto err_htc_attach; } if (ath10k_htt_rx_attach(htt)) goto err_rx_attach; /* * Prefetch enough data to satisfy target * classification engine. * This is for LL chips. HL chips will probably * transfer all frame in the tx fragment. */ htt->prefetch_len = 36 + /* 802.11 + qos + ht */ 4 + /* 802.1q */ 8 + /* llc snap */ 2; /* ip4 dscp or ip6 priority */ return htt; err_rx_attach: ath10k_htt_tx_detach(htt); err_htc_attach: kfree(htt); return NULL; } #define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ) static int ath10k_htt_verify_version(struct ath10k_htt *htt) { ath10k_dbg(ATH10K_DBG_HTT, "htt target version %d.%d; host version %d.%d\n", htt->target_version_major, htt->target_version_minor, HTT_CURRENT_VERSION_MAJOR, HTT_CURRENT_VERSION_MINOR); if (htt->target_version_major != HTT_CURRENT_VERSION_MAJOR) { ath10k_err("htt major versions are incompatible!\n"); return -ENOTSUPP; } if (htt->target_version_minor != HTT_CURRENT_VERSION_MINOR) ath10k_warn("htt minor version differ but still compatible\n"); return 0; } int ath10k_htt_attach_target(struct ath10k_htt *htt) { int status; init_completion(&htt->target_version_received); status = ath10k_htt_h2t_ver_req_msg(htt); if (status) return status; status = wait_for_completion_timeout(&htt->target_version_received, HTT_TARGET_VERSION_TIMEOUT_HZ); if (status <= 0) { ath10k_warn("htt version request timed out\n"); return -ETIMEDOUT; } status = ath10k_htt_verify_version(htt); if (status) return status; return ath10k_htt_send_rx_ring_cfg_ll(htt); } void ath10k_htt_detach(struct ath10k_htt *htt) { ath10k_htt_rx_detach(htt); ath10k_htt_tx_detach(htt); kfree(htt); }