blob: 7ff665020015d4c495a5e2f5f13dc41a90d4b6db [file] [log] [blame]
/* SPDX-License-Identifier: ISC */
/*
* Copyright (c) 2005-2011 Atheros Communications Inc.
* Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
*/
#ifndef _HTC_H_
#define _HTC_H_
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/bug.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/bitfield.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.
*/
#define HTC_HOST_MAX_MSG_PER_RX_BUNDLE 32
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_FLAGS_RECV_1MORE_BLOCK = 0x01,
ATH10K_HTC_FLAG_TRAILER_PRESENT = 0x02,
};
#define ATH10K_HTC_FLAG_BUNDLE_MASK GENMASK(7, 4)
/* bits 2-3 are for extra bundle count bits 4-5 */
#define ATH10K_HTC_BUNDLE_EXTRA_MASK GENMASK(3, 2)
#define ATH10K_HTC_BUNDLE_EXTRA_SHIFT 4
static inline unsigned int ath10k_htc_get_bundle_count(u8 max_msgs, u8 flags)
{
unsigned int count, extra_count = 0;
count = FIELD_GET(ATH10K_HTC_FLAG_BUNDLE_MASK, flags);
if (max_msgs > 16)
extra_count = FIELD_GET(ATH10K_HTC_BUNDLE_EXTRA_MASK, flags) <<
ATH10K_HTC_BUNDLE_EXTRA_SHIFT;
return count + extra_count;
}
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;
union {
__le16 pad_len;
struct {
u8 pad0;
u8 pad1;
} __packed;
} __packed;
} __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
};
#define ATH10K_HTC_MSG_READY_EXT_ALT_DATA_MASK 0xFFF
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
};
#define ATH10K_MAX_MSG_PER_HTC_TX_BUNDLE 32
#define ATH10K_MIN_MSG_PER_HTC_TX_BUNDLE 2
#define ATH10K_MIN_CREDIT_PER_HTC_TX_BUNDLE 2
enum ath10k_htc_setup_complete_flags {
ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN = 1
};
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;
union {
__le16 reserved;
struct {
u8 pad0;
u8 pad1;
} __packed;
} __packed;
} __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,
ATH10K_HTC_RECORD_LOOKAHEAD = 2,
ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE = 3,
};
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_lookahead_report {
u8 pre_valid;
u8 pad0;
u8 pad1;
u8 pad2;
u8 lookahead[4];
u8 post_valid;
u8 pad3;
u8 pad4;
u8 pad5;
} __packed;
struct ath10k_htc_lookahead_bundle {
u8 lookahead[4];
} __packed;
struct ath10k_htc_record {
struct ath10k_ath10k_htc_record_hdr hdr;
union {
DECLARE_FLEX_ARRAY(struct ath10k_htc_credit_report, credit_report);
DECLARE_FLEX_ARRAY(struct ath10k_htc_lookahead_report, lookahead_report);
DECLARE_FLEX_ARRAY(struct ath10k_htc_lookahead_bundle, lookahead_bundle);
};
} __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_LOG_SERVICE_GROUP = 6,
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),
ATH10K_HTC_SVC_ID_HTT_DATA2_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 1),
ATH10K_HTC_SVC_ID_HTT_DATA3_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 2),
ATH10K_HTC_SVC_ID_HTT_LOG_MSG = SVC(ATH10K_LOG_SERVICE_GROUP, 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 *);
void (*ep_tx_credits)(struct ath10k *);
};
/* 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;
u8 seq_no; /* for debugging */
int tx_credits;
int tx_credit_size;
bool tx_credit_flow_enabled;
bool bundle_tx;
struct sk_buff_head tx_req_head;
struct sk_buff_head tx_complete_head;
};
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 endpoints */
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;
int target_credit_size;
u8 max_msgs_per_htc_bundle;
int alt_data_credit_size;
};
int ath10k_htc_init(struct ath10k *ar);
int ath10k_htc_wait_target(struct ath10k_htc *htc);
void ath10k_htc_setup_tx_req(struct ath10k_htc_ep *ep);
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);
void ath10k_htc_change_tx_credit_flow(struct ath10k_htc *htc,
enum ath10k_htc_ep_id eid,
bool enable);
int ath10k_htc_send(struct ath10k_htc *htc, enum ath10k_htc_ep_id eid,
struct sk_buff *packet);
void ath10k_htc_stop_hl(struct ath10k *ar);
int ath10k_htc_send_hl(struct ath10k_htc *htc, enum ath10k_htc_ep_id eid,
struct sk_buff *packet);
struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size);
void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
struct sk_buff *skb);
int ath10k_htc_process_trailer(struct ath10k_htc *htc,
u8 *buffer,
int length,
enum ath10k_htc_ep_id src_eid,
void *next_lookaheads,
int *next_lookaheads_len);
#endif