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Diffstat (limited to 'drivers/net/wireless/ath/ath10k/htc.h')
-rw-r--r--drivers/net/wireless/ath/ath10k/htc.h368
1 files changed, 368 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/htc.h b/drivers/net/wireless/ath/ath10k/htc.h
new file mode 100644
index 00000000000..fa45844b59f
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/htc.h
@@ -0,0 +1,368 @@
+/*
+ * 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.
+ */
+
+#ifndef _HTC_H_
+#define _HTC_H_
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/bug.h>
+#include <linux/skbuff.h>
+#include <linux/semaphore.h>
+#include <linux/timer.h>
+
+struct ath10k;
+
+/****************/
+/* HTC protocol */
+/****************/
+
+/*
+ * HTC - host-target control protocol
+ *
+ * tx packets are generally <htc_hdr><payload>
+ * rx packets are more complex: <htc_hdr><payload><trailer>
+ *
+ * The payload + trailer length is stored in len.
+ * To get payload-only length one needs to payload - trailer_len.
+ *
+ * Trailer contains (possibly) multiple <htc_record>.
+ * Each record is a id-len-value.
+ *
+ * HTC header flags, control_byte0, control_byte1
+ * have different meaning depending whether its tx
+ * or rx.
+ *
+ * Alignment: htc_hdr, payload and trailer are
+ * 4-byte aligned.
+ */
+
+enum ath10k_htc_tx_flags {
+ ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
+ ATH10K_HTC_FLAG_SEND_BUNDLE = 0x02
+};
+
+enum ath10k_htc_rx_flags {
+ ATH10K_HTC_FLAG_TRAILER_PRESENT = 0x02,
+ ATH10K_HTC_FLAG_BUNDLE_MASK = 0xF0
+};
+
+struct ath10k_htc_hdr {
+ u8 eid; /* @enum ath10k_htc_ep_id */
+ u8 flags; /* @enum ath10k_htc_tx_flags, ath10k_htc_rx_flags */
+ __le16 len;
+ union {
+ u8 trailer_len; /* for rx */
+ u8 control_byte0;
+ } __packed;
+ union {
+ u8 seq_no; /* for tx */
+ u8 control_byte1;
+ } __packed;
+ u8 pad0;
+ u8 pad1;
+} __packed __aligned(4);
+
+enum ath10k_ath10k_htc_msg_id {
+ ATH10K_HTC_MSG_READY_ID = 1,
+ ATH10K_HTC_MSG_CONNECT_SERVICE_ID = 2,
+ ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
+ ATH10K_HTC_MSG_SETUP_COMPLETE_ID = 4,
+ ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
+ ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6
+};
+
+enum ath10k_htc_version {
+ ATH10K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
+ ATH10K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
+};
+
+enum ath10k_htc_conn_flags {
+ ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH = 0x0,
+ ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF = 0x1,
+ ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS = 0x2,
+ ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY = 0x3,
+#define ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK 0x3
+ ATH10K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE = 1 << 2,
+ ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL = 1 << 3
+#define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_MASK 0xFF00
+#define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_LSB 8
+};
+
+enum ath10k_htc_conn_svc_status {
+ ATH10K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
+ ATH10K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
+ ATH10K_HTC_CONN_SVC_STATUS_FAILED = 2,
+ ATH10K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
+ ATH10K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
+};
+
+struct ath10k_ath10k_htc_msg_hdr {
+ __le16 message_id; /* @enum htc_message_id */
+} __packed;
+
+struct ath10k_htc_unknown {
+ u8 pad0;
+ u8 pad1;
+} __packed;
+
+struct ath10k_htc_ready {
+ __le16 credit_count;
+ __le16 credit_size;
+ u8 max_endpoints;
+ u8 pad0;
+} __packed;
+
+struct ath10k_htc_ready_extended {
+ struct ath10k_htc_ready base;
+ u8 htc_version; /* @enum ath10k_htc_version */
+ u8 max_msgs_per_htc_bundle;
+ u8 pad0;
+ u8 pad1;
+} __packed;
+
+struct ath10k_htc_conn_svc {
+ __le16 service_id;
+ __le16 flags; /* @enum ath10k_htc_conn_flags */
+ u8 pad0;
+ u8 pad1;
+} __packed;
+
+struct ath10k_htc_conn_svc_response {
+ __le16 service_id;
+ u8 status; /* @enum ath10k_htc_conn_svc_status */
+ u8 eid;
+ __le16 max_msg_size;
+} __packed;
+
+struct ath10k_htc_setup_complete_extended {
+ u8 pad0;
+ u8 pad1;
+ __le32 flags; /* @enum htc_setup_complete_flags */
+ u8 max_msgs_per_bundled_recv;
+ u8 pad2;
+ u8 pad3;
+ u8 pad4;
+} __packed;
+
+struct ath10k_htc_msg {
+ struct ath10k_ath10k_htc_msg_hdr hdr;
+ union {
+ /* host-to-target */
+ struct ath10k_htc_conn_svc connect_service;
+ struct ath10k_htc_ready ready;
+ struct ath10k_htc_ready_extended ready_ext;
+ struct ath10k_htc_unknown unknown;
+ struct ath10k_htc_setup_complete_extended setup_complete_ext;
+
+ /* target-to-host */
+ struct ath10k_htc_conn_svc_response connect_service_response;
+ };
+} __packed __aligned(4);
+
+enum ath10k_ath10k_htc_record_id {
+ ATH10K_HTC_RECORD_NULL = 0,
+ ATH10K_HTC_RECORD_CREDITS = 1
+};
+
+struct ath10k_ath10k_htc_record_hdr {
+ u8 id; /* @enum ath10k_ath10k_htc_record_id */
+ u8 len;
+ u8 pad0;
+ u8 pad1;
+} __packed;
+
+struct ath10k_htc_credit_report {
+ u8 eid; /* @enum ath10k_htc_ep_id */
+ u8 credits;
+ u8 pad0;
+ u8 pad1;
+} __packed;
+
+struct ath10k_htc_record {
+ struct ath10k_ath10k_htc_record_hdr hdr;
+ union {
+ struct ath10k_htc_credit_report credit_report[0];
+ u8 pauload[0];
+ };
+} __packed __aligned(4);
+
+/*
+ * note: the trailer offset is dynamic depending
+ * on payload length. this is only a struct layout draft
+ */
+struct ath10k_htc_frame {
+ struct ath10k_htc_hdr hdr;
+ union {
+ struct ath10k_htc_msg msg;
+ u8 payload[0];
+ };
+ struct ath10k_htc_record trailer[0];
+} __packed __aligned(4);
+
+
+/*******************/
+/* Host-side stuff */
+/*******************/
+
+enum ath10k_htc_svc_gid {
+ ATH10K_HTC_SVC_GRP_RSVD = 0,
+ ATH10K_HTC_SVC_GRP_WMI = 1,
+ ATH10K_HTC_SVC_GRP_NMI = 2,
+ ATH10K_HTC_SVC_GRP_HTT = 3,
+
+ ATH10K_HTC_SVC_GRP_TEST = 254,
+ ATH10K_HTC_SVC_GRP_LAST = 255,
+};
+
+#define SVC(group, idx) \
+ (int)(((int)(group) << 8) | (int)(idx))
+
+enum ath10k_htc_svc_id {
+ /* NOTE: service ID of 0x0000 is reserved and should never be used */
+ ATH10K_HTC_SVC_ID_RESERVED = 0x0000,
+ ATH10K_HTC_SVC_ID_UNUSED = ATH10K_HTC_SVC_ID_RESERVED,
+
+ ATH10K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH10K_HTC_SVC_GRP_RSVD, 1),
+ ATH10K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_WMI, 0),
+ ATH10K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH10K_HTC_SVC_GRP_WMI, 1),
+ ATH10K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH10K_HTC_SVC_GRP_WMI, 2),
+ ATH10K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH10K_HTC_SVC_GRP_WMI, 3),
+ ATH10K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH10K_HTC_SVC_GRP_WMI, 4),
+
+ ATH10K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_NMI, 0),
+ ATH10K_HTC_SVC_ID_NMI_DATA = SVC(ATH10K_HTC_SVC_GRP_NMI, 1),
+
+ ATH10K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 0),
+
+ /* raw stream service (i.e. flash, tcmd, calibration apps) */
+ ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH10K_HTC_SVC_GRP_TEST, 0),
+};
+
+#undef SVC
+
+enum ath10k_htc_ep_id {
+ ATH10K_HTC_EP_UNUSED = -1,
+ ATH10K_HTC_EP_0 = 0,
+ ATH10K_HTC_EP_1 = 1,
+ ATH10K_HTC_EP_2,
+ ATH10K_HTC_EP_3,
+ ATH10K_HTC_EP_4,
+ ATH10K_HTC_EP_5,
+ ATH10K_HTC_EP_6,
+ ATH10K_HTC_EP_7,
+ ATH10K_HTC_EP_8,
+ ATH10K_HTC_EP_COUNT,
+};
+
+struct ath10k_htc_ops {
+ void (*target_send_suspend_complete)(struct ath10k *ar);
+};
+
+struct ath10k_htc_ep_ops {
+ void (*ep_tx_complete)(struct ath10k *, struct sk_buff *);
+ void (*ep_rx_complete)(struct ath10k *, struct sk_buff *);
+};
+
+/* service connection information */
+struct ath10k_htc_svc_conn_req {
+ u16 service_id;
+ struct ath10k_htc_ep_ops ep_ops;
+ int max_send_queue_depth;
+};
+
+/* service connection response information */
+struct ath10k_htc_svc_conn_resp {
+ u8 buffer_len;
+ u8 actual_len;
+ enum ath10k_htc_ep_id eid;
+ unsigned int max_msg_len;
+ u8 connect_resp_code;
+};
+
+#define ATH10K_NUM_CONTROL_TX_BUFFERS 2
+#define ATH10K_HTC_MAX_LEN 4096
+#define ATH10K_HTC_MAX_CTRL_MSG_LEN 256
+#define ATH10K_HTC_WAIT_TIMEOUT_HZ (1*HZ)
+#define ATH10K_HTC_CONTROL_BUFFER_SIZE (ATH10K_HTC_MAX_CTRL_MSG_LEN + \
+ sizeof(struct ath10k_htc_hdr))
+#define ATH10K_HTC_CONN_SVC_TIMEOUT_HZ (1*HZ)
+
+struct ath10k_htc_ep {
+ struct ath10k_htc *htc;
+ enum ath10k_htc_ep_id eid;
+ enum ath10k_htc_svc_id service_id;
+ struct ath10k_htc_ep_ops ep_ops;
+
+ int max_tx_queue_depth;
+ int max_ep_message_len;
+ u8 ul_pipe_id;
+ u8 dl_pipe_id;
+ int ul_is_polled; /* call HIF to get tx completions */
+ int dl_is_polled; /* call HIF to fetch rx (not implemented) */
+
+ struct sk_buff_head tx_queue;
+
+ u8 seq_no; /* for debugging */
+ int tx_credits;
+ int tx_credit_size;
+ int tx_credits_per_max_message;
+ bool tx_credit_flow_enabled;
+
+ struct work_struct send_work;
+};
+
+struct ath10k_htc_svc_tx_credits {
+ u16 service_id;
+ u8 credit_allocation;
+};
+
+struct ath10k_htc {
+ struct ath10k *ar;
+ struct ath10k_htc_ep endpoint[ATH10K_HTC_EP_COUNT];
+
+ /* protects endpoint and stopping fields */
+ spinlock_t tx_lock;
+
+ struct ath10k_htc_ops htc_ops;
+
+ u8 control_resp_buffer[ATH10K_HTC_MAX_CTRL_MSG_LEN];
+ int control_resp_len;
+
+ struct completion ctl_resp;
+
+ int total_transmit_credits;
+ struct ath10k_htc_svc_tx_credits service_tx_alloc[ATH10K_HTC_EP_COUNT];
+ int target_credit_size;
+
+ bool stopping;
+};
+
+struct ath10k_htc *ath10k_htc_create(struct ath10k *ar,
+ struct ath10k_htc_ops *htc_ops);
+int ath10k_htc_wait_target(struct ath10k_htc *htc);
+int ath10k_htc_start(struct ath10k_htc *htc);
+int ath10k_htc_connect_service(struct ath10k_htc *htc,
+ struct ath10k_htc_svc_conn_req *conn_req,
+ struct ath10k_htc_svc_conn_resp *conn_resp);
+int ath10k_htc_send(struct ath10k_htc *htc, enum ath10k_htc_ep_id eid,
+ struct sk_buff *packet);
+void ath10k_htc_stop(struct ath10k_htc *htc);
+void ath10k_htc_destroy(struct ath10k_htc *htc);
+struct sk_buff *ath10k_htc_alloc_skb(int size);
+
+#endif
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