| /* |
| * 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 <linux/slab.h> |
| #include <linux/if_ether.h> |
| |
| #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; |
| } |
| |
| int ath10k_htt_attach(struct ath10k *ar) |
| { |
| struct ath10k_htt *htt = &ar->htt; |
| int ret; |
| |
| 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. |
| */ |
| ret = ath10k_htt_htc_attach(htt); |
| if (ret) { |
| ath10k_err("could not attach htt htc (%d)\n", ret); |
| 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; |
| } |
| |
| ret = ath10k_htt_rx_attach(htt); |
| if (ret) { |
| ath10k_err("could not attach htt rx (%d)\n", ret); |
| 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 0; |
| |
| err_rx_attach: |
| ath10k_htt_tx_detach(htt); |
| err_htc_attach: |
| return ret; |
| } |
| |
| #define HTT_TARGET_VERSION_TIMEOUT_HZ (3*HZ) |
| |
| static int ath10k_htt_verify_version(struct ath10k_htt *htt) |
| { |
| ath10k_info("htt target version %d.%d\n", |
| htt->target_version_major, htt->target_version_minor); |
| |
| if (htt->target_version_major != 2 && |
| htt->target_version_major != 3) { |
| ath10k_err("unsupported htt major version %d. supported versions are 2 and 3\n", |
| htt->target_version_major); |
| return -ENOTSUPP; |
| } |
| |
| 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); |
| } |