391 lines
10 KiB
C
391 lines
10 KiB
C
/*
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* Copyright (c) 2005-2011 Atheros Communications Inc.
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* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _HTC_H_
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#define _HTC_H_
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/bug.h>
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#include <linux/skbuff.h>
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#include <linux/timer.h>
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struct ath10k;
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/****************/
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/* HTC protocol */
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/****************/
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/*
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* HTC - host-target control protocol
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*
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* tx packets are generally <htc_hdr><payload>
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* rx packets are more complex: <htc_hdr><payload><trailer>
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*
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* The payload + trailer length is stored in len.
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* To get payload-only length one needs to payload - trailer_len.
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*
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* Trailer contains (possibly) multiple <htc_record>.
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* Each record is a id-len-value.
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*
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* HTC header flags, control_byte0, control_byte1
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* have different meaning depending whether its tx
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* or rx.
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*
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* Alignment: htc_hdr, payload and trailer are
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* 4-byte aligned.
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*/
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#define HTC_HOST_MAX_MSG_PER_BUNDLE 8
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enum ath10k_htc_tx_flags {
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ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
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ATH10K_HTC_FLAG_SEND_BUNDLE = 0x02
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};
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enum ath10k_htc_rx_flags {
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ATH10K_HTC_FLAG_TRAILER_PRESENT = 0x02,
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ATH10K_HTC_FLAG_BUNDLE_MASK = 0xF0
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};
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struct ath10k_htc_hdr {
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u8 eid; /* @enum ath10k_htc_ep_id */
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u8 flags; /* @enum ath10k_htc_tx_flags, ath10k_htc_rx_flags */
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__le16 len;
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union {
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u8 trailer_len; /* for rx */
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u8 control_byte0;
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} __packed;
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union {
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u8 seq_no; /* for tx */
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u8 control_byte1;
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} __packed;
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u8 pad0;
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u8 pad1;
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} __packed __aligned(4);
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enum ath10k_ath10k_htc_msg_id {
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ATH10K_HTC_MSG_READY_ID = 1,
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ATH10K_HTC_MSG_CONNECT_SERVICE_ID = 2,
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ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
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ATH10K_HTC_MSG_SETUP_COMPLETE_ID = 4,
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ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
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ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6
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};
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enum ath10k_htc_version {
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ATH10K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
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ATH10K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
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};
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enum ath10k_htc_conn_flags {
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ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH = 0x0,
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ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF = 0x1,
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ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS = 0x2,
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ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY = 0x3,
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#define ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK 0x3
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ATH10K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE = 1 << 2,
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ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL = 1 << 3
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#define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_MASK 0xFF00
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#define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_LSB 8
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};
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enum ath10k_htc_conn_svc_status {
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ATH10K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
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ATH10K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
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ATH10K_HTC_CONN_SVC_STATUS_FAILED = 2,
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ATH10K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
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ATH10K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
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};
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enum ath10k_htc_setup_complete_flags {
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ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN = 1
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};
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struct ath10k_ath10k_htc_msg_hdr {
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__le16 message_id; /* @enum htc_message_id */
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} __packed;
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struct ath10k_htc_unknown {
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u8 pad0;
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u8 pad1;
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} __packed;
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struct ath10k_htc_ready {
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__le16 credit_count;
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__le16 credit_size;
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u8 max_endpoints;
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u8 pad0;
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} __packed;
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struct ath10k_htc_ready_extended {
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struct ath10k_htc_ready base;
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u8 htc_version; /* @enum ath10k_htc_version */
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u8 max_msgs_per_htc_bundle;
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u8 pad0;
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u8 pad1;
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} __packed;
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struct ath10k_htc_conn_svc {
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__le16 service_id;
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__le16 flags; /* @enum ath10k_htc_conn_flags */
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u8 pad0;
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u8 pad1;
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} __packed;
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struct ath10k_htc_conn_svc_response {
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__le16 service_id;
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u8 status; /* @enum ath10k_htc_conn_svc_status */
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u8 eid;
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__le16 max_msg_size;
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} __packed;
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struct ath10k_htc_setup_complete_extended {
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u8 pad0;
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u8 pad1;
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__le32 flags; /* @enum htc_setup_complete_flags */
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u8 max_msgs_per_bundled_recv;
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u8 pad2;
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u8 pad3;
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u8 pad4;
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} __packed;
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struct ath10k_htc_msg {
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struct ath10k_ath10k_htc_msg_hdr hdr;
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union {
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/* host-to-target */
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struct ath10k_htc_conn_svc connect_service;
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struct ath10k_htc_ready ready;
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struct ath10k_htc_ready_extended ready_ext;
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struct ath10k_htc_unknown unknown;
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struct ath10k_htc_setup_complete_extended setup_complete_ext;
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/* target-to-host */
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struct ath10k_htc_conn_svc_response connect_service_response;
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};
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} __packed __aligned(4);
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enum ath10k_ath10k_htc_record_id {
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ATH10K_HTC_RECORD_NULL = 0,
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ATH10K_HTC_RECORD_CREDITS = 1,
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ATH10K_HTC_RECORD_LOOKAHEAD = 2,
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ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE = 3,
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};
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struct ath10k_ath10k_htc_record_hdr {
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u8 id; /* @enum ath10k_ath10k_htc_record_id */
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u8 len;
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u8 pad0;
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u8 pad1;
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} __packed;
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struct ath10k_htc_credit_report {
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u8 eid; /* @enum ath10k_htc_ep_id */
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u8 credits;
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u8 pad0;
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u8 pad1;
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} __packed;
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struct ath10k_htc_lookahead_report {
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u8 pre_valid;
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u8 pad0;
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u8 pad1;
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u8 pad2;
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u8 lookahead[4];
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u8 post_valid;
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u8 pad3;
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u8 pad4;
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u8 pad5;
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} __packed;
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struct ath10k_htc_lookahead_bundle {
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u8 lookahead[4];
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} __packed;
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struct ath10k_htc_record {
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struct ath10k_ath10k_htc_record_hdr hdr;
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union {
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struct ath10k_htc_credit_report credit_report[0];
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struct ath10k_htc_lookahead_report lookahead_report[0];
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struct ath10k_htc_lookahead_bundle lookahead_bundle[0];
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u8 pauload[0];
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};
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} __packed __aligned(4);
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/*
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* note: the trailer offset is dynamic depending
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* on payload length. this is only a struct layout draft
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*/
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struct ath10k_htc_frame {
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struct ath10k_htc_hdr hdr;
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union {
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struct ath10k_htc_msg msg;
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u8 payload[0];
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};
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struct ath10k_htc_record trailer[0];
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} __packed __aligned(4);
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/*******************/
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/* Host-side stuff */
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/*******************/
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enum ath10k_htc_svc_gid {
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ATH10K_HTC_SVC_GRP_RSVD = 0,
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ATH10K_HTC_SVC_GRP_WMI = 1,
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ATH10K_HTC_SVC_GRP_NMI = 2,
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ATH10K_HTC_SVC_GRP_HTT = 3,
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ATH10K_HTC_SVC_GRP_TEST = 254,
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ATH10K_HTC_SVC_GRP_LAST = 255,
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};
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#define SVC(group, idx) \
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(int)(((int)(group) << 8) | (int)(idx))
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enum ath10k_htc_svc_id {
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/* NOTE: service ID of 0x0000 is reserved and should never be used */
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ATH10K_HTC_SVC_ID_RESERVED = 0x0000,
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ATH10K_HTC_SVC_ID_UNUSED = ATH10K_HTC_SVC_ID_RESERVED,
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ATH10K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH10K_HTC_SVC_GRP_RSVD, 1),
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ATH10K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_WMI, 0),
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ATH10K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH10K_HTC_SVC_GRP_WMI, 1),
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ATH10K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH10K_HTC_SVC_GRP_WMI, 2),
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ATH10K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH10K_HTC_SVC_GRP_WMI, 3),
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ATH10K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH10K_HTC_SVC_GRP_WMI, 4),
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ATH10K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_NMI, 0),
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ATH10K_HTC_SVC_ID_NMI_DATA = SVC(ATH10K_HTC_SVC_GRP_NMI, 1),
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ATH10K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 0),
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/* raw stream service (i.e. flash, tcmd, calibration apps) */
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ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH10K_HTC_SVC_GRP_TEST, 0),
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};
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#undef SVC
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enum ath10k_htc_ep_id {
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ATH10K_HTC_EP_UNUSED = -1,
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ATH10K_HTC_EP_0 = 0,
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ATH10K_HTC_EP_1 = 1,
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ATH10K_HTC_EP_2,
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ATH10K_HTC_EP_3,
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ATH10K_HTC_EP_4,
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ATH10K_HTC_EP_5,
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ATH10K_HTC_EP_6,
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ATH10K_HTC_EP_7,
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ATH10K_HTC_EP_8,
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ATH10K_HTC_EP_COUNT,
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};
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struct ath10k_htc_ops {
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void (*target_send_suspend_complete)(struct ath10k *ar);
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};
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struct ath10k_htc_ep_ops {
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void (*ep_tx_complete)(struct ath10k *, struct sk_buff *);
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void (*ep_rx_complete)(struct ath10k *, struct sk_buff *);
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void (*ep_tx_credits)(struct ath10k *);
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};
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/* service connection information */
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struct ath10k_htc_svc_conn_req {
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u16 service_id;
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struct ath10k_htc_ep_ops ep_ops;
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int max_send_queue_depth;
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};
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/* service connection response information */
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struct ath10k_htc_svc_conn_resp {
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u8 buffer_len;
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u8 actual_len;
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enum ath10k_htc_ep_id eid;
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unsigned int max_msg_len;
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u8 connect_resp_code;
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};
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#define ATH10K_NUM_CONTROL_TX_BUFFERS 2
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#define ATH10K_HTC_MAX_LEN 4096
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#define ATH10K_HTC_MAX_CTRL_MSG_LEN 256
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#define ATH10K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
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#define ATH10K_HTC_CONTROL_BUFFER_SIZE (ATH10K_HTC_MAX_CTRL_MSG_LEN + \
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sizeof(struct ath10k_htc_hdr))
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#define ATH10K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
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struct ath10k_htc_ep {
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struct ath10k_htc *htc;
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enum ath10k_htc_ep_id eid;
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enum ath10k_htc_svc_id service_id;
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struct ath10k_htc_ep_ops ep_ops;
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int max_tx_queue_depth;
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int max_ep_message_len;
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u8 ul_pipe_id;
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u8 dl_pipe_id;
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u8 seq_no; /* for debugging */
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int tx_credits;
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bool tx_credit_flow_enabled;
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};
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struct ath10k_htc_svc_tx_credits {
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u16 service_id;
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u8 credit_allocation;
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};
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struct ath10k_htc {
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struct ath10k *ar;
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struct ath10k_htc_ep endpoint[ATH10K_HTC_EP_COUNT];
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/* protects endpoints */
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spinlock_t tx_lock;
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struct ath10k_htc_ops htc_ops;
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u8 control_resp_buffer[ATH10K_HTC_MAX_CTRL_MSG_LEN];
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int control_resp_len;
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struct completion ctl_resp;
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int total_transmit_credits;
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int target_credit_size;
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u8 max_msgs_per_htc_bundle;
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};
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int ath10k_htc_init(struct ath10k *ar);
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int ath10k_htc_wait_target(struct ath10k_htc *htc);
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int ath10k_htc_start(struct ath10k_htc *htc);
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int ath10k_htc_connect_service(struct ath10k_htc *htc,
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struct ath10k_htc_svc_conn_req *conn_req,
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struct ath10k_htc_svc_conn_resp *conn_resp);
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int ath10k_htc_send(struct ath10k_htc *htc, enum ath10k_htc_ep_id eid,
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struct sk_buff *packet);
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struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size);
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void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
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void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
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void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
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struct sk_buff *skb);
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int ath10k_htc_process_trailer(struct ath10k_htc *htc,
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u8 *buffer,
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int length,
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enum ath10k_htc_ep_id src_eid,
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void *next_lookaheads,
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int *next_lookaheads_len);
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#endif
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