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Diffstat (limited to 'drivers/net/wwan/iosm/iosm_ipc_mux_codec.h')
-rw-r--r--drivers/net/wwan/iosm/iosm_ipc_mux_codec.h325
1 files changed, 325 insertions, 0 deletions
diff --git a/drivers/net/wwan/iosm/iosm_ipc_mux_codec.h b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.h
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index 000000000..5d4e3b895
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.h
@@ -0,0 +1,325 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-21 Intel Corporation.
+ */
+
+#ifndef IOSM_IPC_MUX_CODEC_H
+#define IOSM_IPC_MUX_CODEC_H
+
+#include "iosm_ipc_mux.h"
+
+/* Queue level size and reporting
+ * >1 is enable, 0 is disable
+ */
+#define MUX_QUEUE_LEVEL 1
+
+/* ADB finish timer value */
+#define IOSM_AGGR_MUX_ADB_FINISH_TIMEOUT_NSEC (500 * 1000)
+
+/* Enables the flow control (Flow is not allowed) */
+#define IOSM_AGGR_MUX_CMD_FLOW_CTL_ENABLE 5
+
+/* Disables the flow control (Flow is allowed) */
+#define IOSM_AGGR_MUX_CMD_FLOW_CTL_DISABLE 6
+
+/* ACK the flow control command. Shall have the same Transaction ID as the
+ * matching FLOW_CTL command
+ */
+#define IOSM_AGGR_MUX_CMD_FLOW_CTL_ACK 7
+
+/* Aggregation Protocol Command for report packet indicating link quality
+ */
+#define IOSM_AGGR_MUX_CMD_LINK_STATUS_REPORT 8
+
+/* Response to a report packet */
+#define IOSM_AGGR_MUX_CMD_LINK_STATUS_REPORT_RESP 9
+
+/* ACBH: Signature of the Aggregated Command Block Header. */
+#define IOSM_AGGR_MUX_SIG_ACBH 0x48424341
+
+/* ADTH: Signature of the Aggregated Datagram Table Header. */
+#define IOSM_AGGR_MUX_SIG_ADTH 0x48544441
+
+/* ADBH: Signature of the Aggregated Data Block Header. */
+#define IOSM_AGGR_MUX_SIG_ADBH 0x48424441
+
+/* ADGH: Signature of the Datagram Header. */
+#define IOSM_AGGR_MUX_SIG_ADGH 0x48474441
+
+/* Size of the buffer for the IP MUX commands. */
+#define MUX_MAX_UL_ACB_BUF_SIZE 256
+
+/* Maximum number of packets in a go per session */
+#define MUX_MAX_UL_DG_ENTRIES 100
+
+/* ADGH: Signature of the Datagram Header. */
+#define MUX_SIG_ADGH 0x48474441
+
+/* CMDH: Signature of the Command Header. */
+#define MUX_SIG_CMDH 0x48444D43
+
+/* QLTH: Signature of the Queue Level Table */
+#define MUX_SIG_QLTH 0x48544C51
+
+/* FCTH: Signature of the Flow Credit Table */
+#define MUX_SIG_FCTH 0x48544346
+
+/* MUX UL session threshold factor */
+#define IPC_MEM_MUX_UL_SESS_FCOFF_THRESHOLD_FACTOR (4)
+
+/* Size of the buffer for the IP MUX Lite data buffer. */
+#define IPC_MEM_MAX_DL_MUX_LITE_BUF_SIZE (2 * 1024)
+
+/* MUX UL session threshold in number of packets */
+#define IPC_MEM_MUX_UL_SESS_FCON_THRESHOLD (64)
+
+/* Default time out for sending IPC session commands like
+ * open session, close session etc
+ * unit : milliseconds
+ */
+#define IPC_MUX_CMD_RUN_DEFAULT_TIMEOUT 1000 /* 1 second */
+
+/* MUX UL flow control lower threshold in bytes */
+#define IPC_MEM_MUX_UL_FLOWCTRL_LOW_B 10240 /* 10KB */
+
+/* MUX UL flow control higher threshold in bytes (5ms worth of data)*/
+#define IPC_MEM_MUX_UL_FLOWCTRL_HIGH_B (110 * 1024)
+
+/**
+ * struct mux_cmdh - Structure of Command Header.
+ * @signature: Signature of the Command Header.
+ * @cmd_len: Length (in bytes) of the Aggregated Command Block.
+ * @if_id: ID of the interface the commands in the table belong to.
+ * @reserved: Reserved. Set to zero.
+ * @next_cmd_index: Index (in bytes) to the next command in the buffer.
+ * @command_type: Command Enum. See table Session Management chapter for
+ * details.
+ * @transaction_id: The Transaction ID shall be unique to the command
+ * @param: Optional parameters used with the command.
+ */
+struct mux_cmdh {
+ __le32 signature;
+ __le16 cmd_len;
+ u8 if_id;
+ u8 reserved;
+ __le32 next_cmd_index;
+ __le32 command_type;
+ __le32 transaction_id;
+ union mux_cmd_param param;
+};
+
+/**
+ * struct mux_acbh - Structure of the Aggregated Command Block Header.
+ * @signature: Signature of the Aggregated Command Block Header.
+ * @reserved: Reserved bytes. Set to zero.
+ * @sequence_nr: Block sequence number.
+ * @block_length: Length (in bytes) of the Aggregated Command Block.
+ * @first_cmd_index: Index (in bytes) to the first command in the buffer.
+ */
+struct mux_acbh {
+ __le32 signature;
+ __le16 reserved;
+ __le16 sequence_nr;
+ __le32 block_length;
+ __le32 first_cmd_index;
+};
+
+/**
+ * struct mux_adbh - Structure of the Aggregated Data Block Header.
+ * @signature: Signature of the Aggregated Data Block Header.
+ * @reserved: Reserved bytes. Set to zero.
+ * @sequence_nr: Block sequence number.
+ * @block_length: Length (in bytes) of the Aggregated Data Block.
+ * @first_table_index: Index (in bytes) to the first Datagram Table in
+ * the buffer.
+ */
+struct mux_adbh {
+ __le32 signature;
+ __le16 reserved;
+ __le16 sequence_nr;
+ __le32 block_length;
+ __le32 first_table_index;
+};
+
+/**
+ * struct mux_adth - Structure of the Aggregated Datagram Table Header.
+ * @signature: Signature of the Aggregated Datagram Table Header.
+ * @table_length: Length (in bytes) of the datagram table.
+ * @if_id: ID of the interface the datagrams in the table
+ * belong to.
+ * @opt_ipv4v6: Indicates IPv4(=0)/IPv6(=1) hint.
+ * @reserved: Reserved bits. Set to zero.
+ * @next_table_index: Index (in bytes) to the next Datagram Table in
+ * the buffer.
+ * @reserved2: Reserved bytes. Set to zero
+ * @dg: datagramm table with variable length
+ */
+struct mux_adth {
+ __le32 signature;
+ __le16 table_length;
+ u8 if_id;
+ u8 opt_ipv4v6;
+ __le32 next_table_index;
+ __le32 reserved2;
+ struct mux_adth_dg dg;
+};
+
+/**
+ * struct mux_adgh - Aggregated Datagram Header.
+ * @signature: Signature of the Aggregated Datagram Header(0x48474441)
+ * @length: Length (in bytes) of the datagram header. This length
+ * shall include the header size. Min value: 0x10
+ * @if_id: ID of the interface the datagrams belong to
+ * @opt_ipv4v6: Indicates IPv4(=0)/IPv6(=1), It is optional if not
+ * used set it to zero.
+ * @reserved: Reserved bits. Set to zero.
+ * @service_class: Service class identifier for the datagram.
+ * @next_count: Count of the datagrams that shall be following this
+ * datagrams for this interface. A count of zero means
+ * the next datagram may not belong to this interface.
+ * @reserved1: Reserved bytes, Set to zero
+ */
+struct mux_adgh {
+ __le32 signature;
+ __le16 length;
+ u8 if_id;
+ u8 opt_ipv4v6;
+ u8 service_class;
+ u8 next_count;
+ u8 reserved1[6];
+};
+
+/**
+ * struct mux_lite_cmdh - MUX Lite Command Header
+ * @signature: Signature of the Command Header(0x48444D43)
+ * @cmd_len: Length (in bytes) of the command. This length shall
+ * include the header size. Minimum value: 0x10
+ * @if_id: ID of the interface the commands in the table belong to.
+ * @reserved: Reserved Set to zero.
+ * @command_type: Command Enum.
+ * @transaction_id: 4 byte value shall be generated and sent along with a
+ * command Responses and ACKs shall have the same
+ * Transaction ID as their commands. It shall be unique to
+ * the command transaction on the given interface.
+ * @param: Optional parameters used with the command.
+ */
+struct mux_lite_cmdh {
+ __le32 signature;
+ __le16 cmd_len;
+ u8 if_id;
+ u8 reserved;
+ __le32 command_type;
+ __le32 transaction_id;
+ union mux_cmd_param param;
+};
+
+/**
+ * struct mux_lite_vfl - value field in generic table
+ * @nr_of_bytes: Number of bytes available to transmit in the queue.
+ */
+struct mux_lite_vfl {
+ __le32 nr_of_bytes;
+};
+
+/**
+ * struct ipc_mem_lite_gen_tbl - Generic table format for Queue Level
+ * and Flow Credit
+ * @signature: Signature of the table
+ * @length: Length of the table
+ * @if_id: ID of the interface the table belongs to
+ * @vfl_length: Value field length
+ * @reserved: Reserved
+ * @vfl: Value field of variable length
+ */
+struct ipc_mem_lite_gen_tbl {
+ __le32 signature;
+ __le16 length;
+ u8 if_id;
+ u8 vfl_length;
+ u32 reserved[2];
+ struct mux_lite_vfl vfl;
+};
+
+/**
+ * struct mux_type_cmdh - Structure of command header for mux lite and aggr
+ * @ack_lite: MUX Lite Command Header pointer
+ * @ack_aggr: Command Header pointer
+ */
+union mux_type_cmdh {
+ struct mux_lite_cmdh *ack_lite;
+ struct mux_cmdh *ack_aggr;
+};
+
+/**
+ * struct mux_type_header - Structure of mux header type
+ * @adgh: Aggregated Datagram Header pointer
+ * @adbh: Aggregated Data Block Header pointer
+ */
+union mux_type_header {
+ struct mux_adgh *adgh;
+ struct mux_adbh *adbh;
+};
+
+void ipc_mux_dl_decode(struct iosm_mux *ipc_mux, struct sk_buff *skb);
+
+/**
+ * ipc_mux_dl_acb_send_cmds - Respond to the Command blocks.
+ * @ipc_mux: Pointer to MUX data-struct
+ * @cmd_type: Command
+ * @if_id: Session interface id.
+ * @transaction_id: Command transaction id.
+ * @param: Pointer to command params.
+ * @res_size: Response size
+ * @blocking: True for blocking send
+ * @respond: If true return transaction ID
+ *
+ * Returns: 0 in success and failure value on error
+ */
+int ipc_mux_dl_acb_send_cmds(struct iosm_mux *ipc_mux, u32 cmd_type, u8 if_id,
+ u32 transaction_id, union mux_cmd_param *param,
+ size_t res_size, bool blocking, bool respond);
+
+/**
+ * ipc_mux_netif_tx_flowctrl - Enable/Disable TX flow control on MUX sessions.
+ * @session: Pointer to mux_session struct
+ * @idx: Session ID
+ * @on: true for Enable and false for disable flow control
+ */
+void ipc_mux_netif_tx_flowctrl(struct mux_session *session, int idx, bool on);
+
+/**
+ * ipc_mux_ul_trigger_encode - Route the UL packet through the IP MUX layer
+ * for encoding.
+ * @ipc_mux: Pointer to MUX data-struct
+ * @if_id: Session ID.
+ * @skb: Pointer to ipc_skb.
+ *
+ * Returns: 0 if successfully encoded
+ * failure value on error
+ * -EBUSY if packet has to be retransmitted.
+ */
+int ipc_mux_ul_trigger_encode(struct iosm_mux *ipc_mux, int if_id,
+ struct sk_buff *skb);
+/**
+ * ipc_mux_ul_data_encode - UL encode function for calling from Tasklet context.
+ * @ipc_mux: Pointer to MUX data-struct
+ *
+ * Returns: TRUE if any packet of any session is encoded FALSE otherwise.
+ */
+bool ipc_mux_ul_data_encode(struct iosm_mux *ipc_mux);
+
+/**
+ * ipc_mux_ul_encoded_process - Handles the Modem processed UL data by adding
+ * the SKB to the UL free list.
+ * @ipc_mux: Pointer to MUX data-struct
+ * @skb: Pointer to ipc_skb.
+ */
+void ipc_mux_ul_encoded_process(struct iosm_mux *ipc_mux, struct sk_buff *skb);
+
+void ipc_mux_ul_adb_finish(struct iosm_mux *ipc_mux);
+
+void ipc_mux_ul_adb_update_ql(struct iosm_mux *ipc_mux, struct mux_adb *p_adb,
+ int session_id, int qlth_n_ql_size,
+ struct sk_buff_head *ul_list);
+
+#endif