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677 lines
17 KiB
677 lines
17 KiB
/* |
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* Copyright (c) 2004-2011 Atheros Communications Inc. |
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* Copyright (c) 2011 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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|
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#ifndef HTC_H |
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#define HTC_H |
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|
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#include "common.h" |
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|
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/* frame header flags */ |
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/* send direction */ |
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#define HTC_FLAGS_NEED_CREDIT_UPDATE (1 << 0) |
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#define HTC_FLAGS_SEND_BUNDLE (1 << 1) |
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#define HTC_FLAGS_TX_FIXUP_NETBUF (1 << 2) |
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|
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/* receive direction */ |
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#define HTC_FLG_RX_UNUSED (1 << 0) |
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#define HTC_FLG_RX_TRAILER (1 << 1) |
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/* Bundle count maske and shift */ |
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#define HTC_FLG_RX_BNDL_CNT (0xF0) |
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#define HTC_FLG_RX_BNDL_CNT_S 4 |
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#define HTC_HDR_LENGTH (sizeof(struct htc_frame_hdr)) |
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#define HTC_MAX_PAYLOAD_LENGTH (4096 - sizeof(struct htc_frame_hdr)) |
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/* HTC control message IDs */ |
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#define HTC_MSG_READY_ID 1 |
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#define HTC_MSG_CONN_SVC_ID 2 |
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#define HTC_MSG_CONN_SVC_RESP_ID 3 |
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#define HTC_MSG_SETUP_COMPLETE_ID 4 |
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#define HTC_MSG_SETUP_COMPLETE_EX_ID 5 |
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#define HTC_MAX_CTRL_MSG_LEN 256 |
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#define HTC_VERSION_2P0 0x00 |
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#define HTC_VERSION_2P1 0x01 |
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#define HTC_SERVICE_META_DATA_MAX_LENGTH 128 |
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#define HTC_CONN_FLGS_THRESH_LVL_QUAT 0x0 |
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#define HTC_CONN_FLGS_THRESH_LVL_HALF 0x1 |
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#define HTC_CONN_FLGS_THRESH_LVL_THREE_QUAT 0x2 |
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#define HTC_CONN_FLGS_REDUCE_CRED_DRIB 0x4 |
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#define HTC_CONN_FLGS_THRESH_MASK 0x3 |
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/* disable credit flow control on a specific service */ |
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#define HTC_CONN_FLGS_DISABLE_CRED_FLOW_CTRL (1 << 3) |
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#define HTC_CONN_FLGS_SET_RECV_ALLOC_SHIFT 8 |
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#define HTC_CONN_FLGS_SET_RECV_ALLOC_MASK 0xFF00U |
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|
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/* connect response status codes */ |
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#define HTC_SERVICE_SUCCESS 0 |
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#define HTC_SERVICE_NOT_FOUND 1 |
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#define HTC_SERVICE_FAILED 2 |
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|
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/* no resources (i.e. no more endpoints) */ |
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#define HTC_SERVICE_NO_RESOURCES 3 |
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/* specific service is not allowing any more endpoints */ |
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#define HTC_SERVICE_NO_MORE_EP 4 |
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/* report record IDs */ |
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#define HTC_RECORD_NULL 0 |
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#define HTC_RECORD_CREDITS 1 |
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#define HTC_RECORD_LOOKAHEAD 2 |
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#define HTC_RECORD_LOOKAHEAD_BUNDLE 3 |
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#define HTC_SETUP_COMP_FLG_RX_BNDL_EN (1 << 0) |
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#define HTC_SETUP_COMP_FLG_DISABLE_TX_CREDIT_FLOW (1 << 1) |
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#define MAKE_SERVICE_ID(group, index) \ |
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(int)(((int)group << 8) | (int)(index)) |
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/* NOTE: service ID of 0x0000 is reserved and should never be used */ |
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#define HTC_CTRL_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 1) |
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#define WMI_CONTROL_SVC MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 0) |
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#define WMI_DATA_BE_SVC MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 1) |
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#define WMI_DATA_BK_SVC MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 2) |
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#define WMI_DATA_VI_SVC MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 3) |
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#define WMI_DATA_VO_SVC MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 4) |
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#define WMI_MAX_SERVICES 5 |
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#define WMM_NUM_AC 4 |
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/* reserved and used to flush ALL packets */ |
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#define HTC_TX_PACKET_TAG_ALL 0 |
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#define HTC_SERVICE_TX_PACKET_TAG 1 |
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#define HTC_TX_PACKET_TAG_USER_DEFINED (HTC_SERVICE_TX_PACKET_TAG + 9) |
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/* more packets on this endpoint are being fetched */ |
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#define HTC_RX_FLAGS_INDICATE_MORE_PKTS (1 << 0) |
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/* TODO.. for BMI */ |
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#define ENDPOINT1 0 |
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/* TODO -remove me, but we have to fix BMI first */ |
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#define HTC_MAILBOX_NUM_MAX 4 |
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/* enable send bundle padding for this endpoint */ |
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#define HTC_FLGS_TX_BNDL_PAD_EN (1 << 0) |
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#define HTC_EP_ACTIVE ((u32) (1u << 31)) |
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/* HTC operational parameters */ |
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#define HTC_TARGET_RESPONSE_TIMEOUT 2000 /* in ms */ |
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#define HTC_TARGET_RESPONSE_POLL_WAIT 10 |
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#define HTC_TARGET_RESPONSE_POLL_COUNT 200 |
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#define HTC_TARGET_DEBUG_INTR_MASK 0x01 |
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#define HTC_TARGET_CREDIT_INTR_MASK 0xF0 |
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#define HTC_HOST_MAX_MSG_PER_BUNDLE 8 |
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#define HTC_MIN_HTC_MSGS_TO_BUNDLE 2 |
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/* packet flags */ |
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#define HTC_RX_PKT_IGNORE_LOOKAHEAD (1 << 0) |
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#define HTC_RX_PKT_REFRESH_HDR (1 << 1) |
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#define HTC_RX_PKT_PART_OF_BUNDLE (1 << 2) |
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#define HTC_RX_PKT_NO_RECYCLE (1 << 3) |
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#define NUM_CONTROL_BUFFERS 8 |
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#define NUM_CONTROL_TX_BUFFERS 2 |
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#define NUM_CONTROL_RX_BUFFERS (NUM_CONTROL_BUFFERS - NUM_CONTROL_TX_BUFFERS) |
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#define HTC_RECV_WAIT_BUFFERS (1 << 0) |
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#define HTC_OP_STATE_STOPPING (1 << 0) |
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#define HTC_OP_STATE_SETUP_COMPLETE (1 << 1) |
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/* |
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* The frame header length and message formats defined herein were selected |
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* to accommodate optimal alignment for target processing. This reduces |
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* code size and improves performance. Any changes to the header length may |
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* alter the alignment and cause exceptions on the target. When adding to |
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* the messagestructures insure that fields are properly aligned. |
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*/ |
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/* HTC frame header |
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* |
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* NOTE: do not remove or re-arrange the fields, these are minimally |
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* required to take advantage of 4-byte lookaheads in some hardware |
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* implementations. |
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*/ |
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struct htc_frame_hdr { |
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u8 eid; |
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u8 flags; |
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/* length of data (including trailer) that follows the header */ |
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__le16 payld_len; |
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/* end of 4-byte lookahead */ |
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u8 ctrl[2]; |
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} __packed; |
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/* HTC ready message */ |
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struct htc_ready_msg { |
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__le16 msg_id; |
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__le16 cred_cnt; |
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__le16 cred_sz; |
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u8 max_ep; |
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u8 pad; |
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} __packed; |
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/* extended HTC ready message */ |
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struct htc_ready_ext_msg { |
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struct htc_ready_msg ver2_0_info; |
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u8 htc_ver; |
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u8 msg_per_htc_bndl; |
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} __packed; |
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/* connect service */ |
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struct htc_conn_service_msg { |
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__le16 msg_id; |
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__le16 svc_id; |
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__le16 conn_flags; |
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u8 svc_meta_len; |
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u8 pad; |
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} __packed; |
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/* connect response */ |
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struct htc_conn_service_resp { |
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__le16 msg_id; |
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__le16 svc_id; |
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u8 status; |
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u8 eid; |
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__le16 max_msg_sz; |
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u8 svc_meta_len; |
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u8 pad; |
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} __packed; |
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struct htc_setup_comp_msg { |
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__le16 msg_id; |
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} __packed; |
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/* extended setup completion message */ |
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struct htc_setup_comp_ext_msg { |
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__le16 msg_id; |
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__le32 flags; |
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u8 msg_per_rxbndl; |
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u8 Rsvd[3]; |
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} __packed; |
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struct htc_record_hdr { |
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u8 rec_id; |
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u8 len; |
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} __packed; |
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struct htc_credit_report { |
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u8 eid; |
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u8 credits; |
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} __packed; |
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/* |
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* NOTE: The lk_ahd array is guarded by a pre_valid |
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* and Post Valid guard bytes. The pre_valid bytes must |
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* equal the inverse of the post_valid byte. |
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*/ |
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struct htc_lookahead_report { |
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u8 pre_valid; |
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u8 lk_ahd[4]; |
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u8 post_valid; |
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} __packed; |
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struct htc_bundle_lkahd_rpt { |
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u8 lk_ahd[4]; |
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} __packed; |
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/* Current service IDs */ |
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enum htc_service_grp_ids { |
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RSVD_SERVICE_GROUP = 0, |
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WMI_SERVICE_GROUP = 1, |
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HTC_TEST_GROUP = 254, |
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HTC_SERVICE_GROUP_LAST = 255 |
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}; |
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/* ------ endpoint IDS ------ */ |
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enum htc_endpoint_id { |
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ENDPOINT_UNUSED = -1, |
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ENDPOINT_0 = 0, |
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ENDPOINT_1 = 1, |
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ENDPOINT_2 = 2, |
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ENDPOINT_3, |
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ENDPOINT_4, |
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ENDPOINT_5, |
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ENDPOINT_6, |
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ENDPOINT_7, |
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ENDPOINT_8, |
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ENDPOINT_MAX, |
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}; |
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struct htc_tx_packet_info { |
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u16 tag; |
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int cred_used; |
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u8 flags; |
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int seqno; |
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}; |
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struct htc_rx_packet_info { |
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u32 exp_hdr; |
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u32 rx_flags; |
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u32 indicat_flags; |
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}; |
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struct htc_target; |
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/* wrapper around endpoint-specific packets */ |
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struct htc_packet { |
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struct list_head list; |
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/* caller's per packet specific context */ |
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void *pkt_cntxt; |
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/* |
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* the true buffer start , the caller can store the real |
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* buffer start here. In receive callbacks, the HTC layer |
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* sets buf to the start of the payload past the header. |
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* This field allows the caller to reset buf when it recycles |
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* receive packets back to HTC. |
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*/ |
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u8 *buf_start; |
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/* |
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* Pointer to the start of the buffer. In the transmit |
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* direction this points to the start of the payload. In the |
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* receive direction, however, the buffer when queued up |
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* points to the start of the HTC header but when returned |
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* to the caller points to the start of the payload |
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*/ |
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u8 *buf; |
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u32 buf_len; |
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/* actual length of payload */ |
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u32 act_len; |
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/* endpoint that this packet was sent/recv'd from */ |
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enum htc_endpoint_id endpoint; |
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/* completion status */ |
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int status; |
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union { |
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struct htc_tx_packet_info tx; |
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struct htc_rx_packet_info rx; |
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} info; |
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void (*completion) (struct htc_target *, struct htc_packet *); |
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struct htc_target *context; |
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/* |
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* optimization for network-oriented data, the HTC packet |
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* can pass the network buffer corresponding to the HTC packet |
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* lower layers may optimized the transfer knowing this is |
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* a network buffer |
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*/ |
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struct sk_buff *skb; |
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}; |
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enum htc_send_full_action { |
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HTC_SEND_FULL_KEEP = 0, |
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HTC_SEND_FULL_DROP = 1, |
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}; |
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struct htc_ep_callbacks { |
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void (*tx_complete) (struct htc_target *, struct htc_packet *); |
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void (*rx) (struct htc_target *, struct htc_packet *); |
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void (*rx_refill) (struct htc_target *, enum htc_endpoint_id endpoint); |
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enum htc_send_full_action (*tx_full) (struct htc_target *, |
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struct htc_packet *); |
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struct htc_packet *(*rx_allocthresh) (struct htc_target *, |
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enum htc_endpoint_id, int); |
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void (*tx_comp_multi) (struct htc_target *, struct list_head *); |
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int rx_alloc_thresh; |
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int rx_refill_thresh; |
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}; |
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/* service connection information */ |
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struct htc_service_connect_req { |
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u16 svc_id; |
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u16 conn_flags; |
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struct htc_ep_callbacks ep_cb; |
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int max_txq_depth; |
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u32 flags; |
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unsigned int max_rxmsg_sz; |
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}; |
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/* service connection response information */ |
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struct htc_service_connect_resp { |
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u8 buf_len; |
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u8 act_len; |
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enum htc_endpoint_id endpoint; |
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unsigned int len_max; |
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u8 resp_code; |
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}; |
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/* endpoint distributionstructure */ |
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struct htc_endpoint_credit_dist { |
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struct list_head list; |
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/* Service ID (set by HTC) */ |
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u16 svc_id; |
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/* endpoint for this distributionstruct (set by HTC) */ |
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enum htc_endpoint_id endpoint; |
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u32 dist_flags; |
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/* |
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* credits for normal operation, anything above this |
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* indicates the endpoint is over-subscribed. |
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*/ |
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int cred_norm; |
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/* floor for credit distribution */ |
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int cred_min; |
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int cred_assngd; |
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/* current credits available */ |
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int credits; |
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/* |
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* pending credits to distribute on this endpoint, this |
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* is set by HTC when credit reports arrive. The credit |
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* distribution functions sets this to zero when it distributes |
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* the credits. |
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*/ |
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int cred_to_dist; |
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/* |
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* the number of credits that the current pending TX packet needs |
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* to transmit. This is set by HTC when endpoint needs credits in |
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* order to transmit. |
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*/ |
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int seek_cred; |
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/* size in bytes of each credit */ |
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int cred_sz; |
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/* credits required for a maximum sized messages */ |
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int cred_per_msg; |
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/* reserved for HTC use */ |
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struct htc_endpoint *htc_ep; |
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/* |
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* current depth of TX queue , i.e. messages waiting for credits |
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* This field is valid only when HTC_CREDIT_DIST_ACTIVITY_CHANGE |
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* or HTC_CREDIT_DIST_SEND_COMPLETE is indicated on an endpoint |
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* that has non-zero credits to recover. |
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*/ |
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int txq_depth; |
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}; |
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/* |
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* credit distribution code that is passed into the distribution function, |
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* there are mandatory and optional codes that must be handled |
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*/ |
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enum htc_credit_dist_reason { |
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HTC_CREDIT_DIST_SEND_COMPLETE = 0, |
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HTC_CREDIT_DIST_ACTIVITY_CHANGE = 1, |
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HTC_CREDIT_DIST_SEEK_CREDITS, |
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}; |
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struct ath6kl_htc_credit_info { |
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int total_avail_credits; |
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int cur_free_credits; |
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/* list of lowest priority endpoints */ |
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struct list_head lowestpri_ep_dist; |
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}; |
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/* endpoint statistics */ |
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struct htc_endpoint_stats { |
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/* |
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* number of times the host set the credit-low flag in a send |
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* message on this endpoint |
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*/ |
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u32 cred_low_indicate; |
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u32 tx_issued; |
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u32 tx_pkt_bundled; |
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u32 tx_bundles; |
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u32 tx_dropped; |
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/* running count of total credit reports received for this endpoint */ |
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u32 tx_cred_rpt; |
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/* credit reports received from this endpoint's RX packets */ |
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u32 cred_rpt_from_rx; |
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/* credit reports received from RX packets of other endpoints */ |
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u32 cred_rpt_from_other; |
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/* credit reports received from endpoint 0 RX packets */ |
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u32 cred_rpt_ep0; |
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/* count of credits received via Rx packets on this endpoint */ |
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u32 cred_from_rx; |
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/* count of credits received via another endpoint */ |
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u32 cred_from_other; |
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/* count of credits received via another endpoint */ |
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u32 cred_from_ep0; |
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/* count of consummed credits */ |
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u32 cred_cosumd; |
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/* count of credits returned */ |
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u32 cred_retnd; |
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u32 rx_pkts; |
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/* count of lookahead records found in Rx msg */ |
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u32 rx_lkahds; |
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/* count of recv packets received in a bundle */ |
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u32 rx_bundl; |
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/* count of number of bundled lookaheads */ |
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u32 rx_bundle_lkahd; |
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/* count of the number of bundle indications from the HTC header */ |
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u32 rx_bundle_from_hdr; |
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/* the number of times the recv allocation threshold was hit */ |
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u32 rx_alloc_thresh_hit; |
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/* total number of bytes */ |
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u32 rxalloc_thresh_byte; |
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}; |
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struct htc_endpoint { |
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enum htc_endpoint_id eid; |
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u16 svc_id; |
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struct list_head txq; |
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struct list_head rx_bufq; |
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struct htc_endpoint_credit_dist cred_dist; |
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struct htc_ep_callbacks ep_cb; |
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int max_txq_depth; |
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int len_max; |
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int tx_proc_cnt; |
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int rx_proc_cnt; |
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struct htc_target *target; |
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u8 seqno; |
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u32 conn_flags; |
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struct htc_endpoint_stats ep_st; |
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u16 tx_drop_packet_threshold; |
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struct { |
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u8 pipeid_ul; |
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u8 pipeid_dl; |
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struct list_head tx_lookup_queue; |
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bool tx_credit_flow_enabled; |
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} pipe; |
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}; |
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struct htc_control_buffer { |
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struct htc_packet packet; |
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u8 *buf; |
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}; |
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struct htc_pipe_txcredit_alloc { |
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u16 service_id; |
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u8 credit_alloc; |
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}; |
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enum htc_send_queue_result { |
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HTC_SEND_QUEUE_OK = 0, /* packet was queued */ |
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HTC_SEND_QUEUE_DROP = 1, /* this packet should be dropped */ |
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}; |
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struct ath6kl_htc_ops { |
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void* (*create)(struct ath6kl *ar); |
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int (*wait_target)(struct htc_target *target); |
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int (*start)(struct htc_target *target); |
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int (*conn_service)(struct htc_target *target, |
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struct htc_service_connect_req *req, |
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struct htc_service_connect_resp *resp); |
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int (*tx)(struct htc_target *target, struct htc_packet *packet); |
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void (*stop)(struct htc_target *target); |
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void (*cleanup)(struct htc_target *target); |
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void (*flush_txep)(struct htc_target *target, |
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enum htc_endpoint_id endpoint, u16 tag); |
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void (*flush_rx_buf)(struct htc_target *target); |
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void (*activity_changed)(struct htc_target *target, |
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enum htc_endpoint_id endpoint, |
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bool active); |
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int (*get_rxbuf_num)(struct htc_target *target, |
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enum htc_endpoint_id endpoint); |
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int (*add_rxbuf_multiple)(struct htc_target *target, |
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struct list_head *pktq); |
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int (*credit_setup)(struct htc_target *target, |
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struct ath6kl_htc_credit_info *cred_info); |
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int (*tx_complete)(struct ath6kl *ar, struct sk_buff *skb); |
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int (*rx_complete)(struct ath6kl *ar, struct sk_buff *skb, u8 pipe); |
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}; |
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struct ath6kl_device; |
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/* our HTC target state */ |
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struct htc_target { |
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struct htc_endpoint endpoint[ENDPOINT_MAX]; |
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|
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/* contains struct htc_endpoint_credit_dist */ |
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struct list_head cred_dist_list; |
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|
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struct list_head free_ctrl_txbuf; |
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struct list_head free_ctrl_rxbuf; |
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struct ath6kl_htc_credit_info *credit_info; |
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int tgt_creds; |
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unsigned int tgt_cred_sz; |
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/* protects free_ctrl_txbuf and free_ctrl_rxbuf */ |
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spinlock_t htc_lock; |
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|
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/* FIXME: does this protext rx_bufq and endpoint structures or what? */ |
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spinlock_t rx_lock; |
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|
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/* protects endpoint->txq */ |
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spinlock_t tx_lock; |
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|
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struct ath6kl_device *dev; |
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u32 htc_flags; |
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u32 rx_st_flags; |
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enum htc_endpoint_id ep_waiting; |
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u8 htc_tgt_ver; |
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|
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/* max messages per bundle for HTC */ |
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int msg_per_bndl_max; |
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|
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u32 tx_bndl_mask; |
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int rx_bndl_enable; |
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int max_rx_bndl_sz; |
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int max_tx_bndl_sz; |
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|
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u32 block_sz; |
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u32 block_mask; |
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|
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int max_scat_entries; |
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int max_xfer_szper_scatreq; |
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|
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int chk_irq_status_cnt; |
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|
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/* counts the number of Tx without bundling continously per AC */ |
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u32 ac_tx_count[WMM_NUM_AC]; |
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|
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struct { |
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struct htc_packet *htc_packet_pool; |
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u8 ctrl_response_buf[HTC_MAX_CTRL_MSG_LEN]; |
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int ctrl_response_len; |
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bool ctrl_response_valid; |
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struct htc_pipe_txcredit_alloc txcredit_alloc[ENDPOINT_MAX]; |
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} pipe; |
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}; |
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|
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int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target, |
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u32 msg_look_ahead, int *n_pkts); |
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|
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static inline void set_htc_pkt_info(struct htc_packet *packet, void *context, |
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u8 *buf, unsigned int len, |
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enum htc_endpoint_id eid, u16 tag) |
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{ |
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packet->pkt_cntxt = context; |
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packet->buf = buf; |
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packet->act_len = len; |
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packet->endpoint = eid; |
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packet->info.tx.tag = tag; |
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} |
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|
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static inline void htc_rxpkt_reset(struct htc_packet *packet) |
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{ |
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packet->buf = packet->buf_start; |
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packet->act_len = 0; |
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} |
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|
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static inline void set_htc_rxpkt_info(struct htc_packet *packet, void *context, |
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u8 *buf, unsigned long len, |
|
enum htc_endpoint_id eid) |
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{ |
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packet->pkt_cntxt = context; |
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packet->buf = buf; |
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packet->buf_start = buf; |
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packet->buf_len = len; |
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packet->endpoint = eid; |
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} |
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|
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static inline int get_queue_depth(struct list_head *queue) |
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{ |
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struct list_head *tmp_list; |
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int depth = 0; |
|
|
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list_for_each(tmp_list, queue) |
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depth++; |
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|
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return depth; |
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} |
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|
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void ath6kl_htc_pipe_attach(struct ath6kl *ar); |
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void ath6kl_htc_mbox_attach(struct ath6kl *ar); |
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#endif
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