182 lines
5.8 KiB
C
182 lines
5.8 KiB
C
/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _BAM_DMUX_PRIVATE_H
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#define _BAM_DMUX_PRIVATE_H
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#include <linux/types.h>
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#include <linux/dma-mapping.h>
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#include <linux/msm-sps.h>
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#define BAM_MUX_HDR_MAGIC_NO 0x33fc
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#define BAM_MUX_HDR_CMD_DATA 0
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#define BAM_MUX_HDR_CMD_OPEN 1
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#define BAM_MUX_HDR_CMD_CLOSE 2
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#define BAM_MUX_HDR_CMD_STATUS 3 /* unused */
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#define BAM_MUX_HDR_CMD_OPEN_NO_A2_PC 4
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#define DEFAULT_BUFFER_SIZE SZ_2K
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#define DYNAMIC_MTU_MASK 0x2
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#define MTU_SIZE_MASK 0xc0
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#define MTU_SIZE_SHIFT 0x6
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#define DL_POOL_SIZE_SHIFT 0x4
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/**
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* struct bam_ops_if - collection of function pointers to allow swappable
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* runtime functionality
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* @smsm_change_state_ptr: pointer to smsm_change_state function
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* @smsm_get_state_ptr: pointer to smsm_get_state function
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* @smsm_state_cb_register_ptr: pointer to smsm_state_cb_register function
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* @smsm_state_cb_deregister_ptr: pointer to smsm_state_cb_deregister function
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* @sps_connect_ptr: pointer to sps_connect function
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* @sps_disconnect_ptr: pointer to sps_disconnect function
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* @sps_register_bam_device_ptr: pointer to sps_register_bam_device
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* @sps_deregister_bam_device_ptr: pointer to sps_deregister_bam_device
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* function
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* @sps_alloc_endpoint_ptr: pointer to sps_alloc_endpoint function
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* @sps_free_endpoint_ptr: pointer to sps_free_endpoint function
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* @sps_set_config_ptr: pointer to sps_set_config function
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* @sps_get_config_ptr: pointer to sps_get_config function
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* @sps_device_reset_ptr: pointer to sps_device_reset function
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* @sps_register_event_ptr: pointer to sps_register_event function
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* @sps_transfer_one_ptr: pointer to sps_transfer_one function
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* @sps_get_iovec_ptr: pointer to sps_get_iovec function
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* @sps_get_unused_desc_num_ptr: pointer to sps_get_unused_desc_num function
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* @dma_to: enum for the direction of dma operations to device
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* @dma_from: enum for the direction of dma operations from device
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*
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* This struct contains the interface from bam_dmux to smsm and sps. The
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* pointers can be swapped out at run time to provide different functionality.
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*/
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struct bam_ops_if {
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/* smsm */
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int (*smsm_change_state_ptr)(uint32_t smsm_entry,
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uint32_t clear_mask, uint32_t set_mask);
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uint32_t (*smsm_get_state_ptr)(uint32_t smsm_entry);
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int (*smsm_state_cb_register_ptr)(uint32_t smsm_entry, uint32_t mask,
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void (*notify)(void *, uint32_t old_state, uint32_t new_state),
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void *data);
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int (*smsm_state_cb_deregister_ptr)(uint32_t smsm_entry, uint32_t mask,
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void (*notify)(void *, uint32_t, uint32_t), void *data);
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/* sps */
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int (*sps_connect_ptr)(struct sps_pipe *h, struct sps_connect *connect);
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int (*sps_disconnect_ptr)(struct sps_pipe *h);
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int (*sps_register_bam_device_ptr)(
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const struct sps_bam_props *bam_props,
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unsigned long *dev_handle);
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int (*sps_deregister_bam_device_ptr)(unsigned long dev_handle);
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struct sps_pipe *(*sps_alloc_endpoint_ptr)(void);
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int (*sps_free_endpoint_ptr)(struct sps_pipe *h);
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int (*sps_set_config_ptr)(struct sps_pipe *h,
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struct sps_connect *config);
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int (*sps_get_config_ptr)(struct sps_pipe *h,
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struct sps_connect *config);
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int (*sps_device_reset_ptr)(unsigned long dev);
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int (*sps_register_event_ptr)(struct sps_pipe *h,
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struct sps_register_event *reg);
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int (*sps_transfer_one_ptr)(struct sps_pipe *h,
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phys_addr_t addr, u32 size,
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void *user, u32 flags);
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int (*sps_get_iovec_ptr)(struct sps_pipe *h,
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struct sps_iovec *iovec);
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int (*sps_get_unused_desc_num_ptr)(struct sps_pipe *h,
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u32 *desc_num);
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enum dma_data_direction dma_to;
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enum dma_data_direction dma_from;
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};
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/**
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* struct bam_mux_hdr - struct which contains bam dmux header info
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* @magic_num: magic number placed at start to ensure that it is actually a
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* valid bam dmux header
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* @signal: optional signaling bits with commmand type specific definitions
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* @cmd: the command
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* @pad_len: the length of padding
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* @ch_id: the id of the bam dmux channel that this is sent on
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* @pkt_len: the length of the packet that this is the header of
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*/
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struct bam_mux_hdr {
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uint16_t magic_num;
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uint8_t signal;
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uint8_t cmd;
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uint8_t pad_len;
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uint8_t ch_id;
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uint16_t pkt_len;
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};
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/**
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* struct rx_pkt_info - struct describing an rx packet
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* @skb: socket buffer containing the packet
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* @dma_address: dma mapped address of the packet
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* @work: work_struct for processing the packet
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* @list_node: list_head for placing this on a list
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* @sps_size: size of the sps_iovec for this packet
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* @len: total length of the buffer containing this packet
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*/
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struct rx_pkt_info {
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struct sk_buff *skb;
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dma_addr_t dma_address;
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struct work_struct work;
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struct list_head list_node;
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uint16_t sps_size;
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uint16_t len;
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};
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/**
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* struct tx_pkt_info - struct describing a tx packet
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* @skb: socket buffer containing the packet
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* @dma_address: dma mapped address of the packet
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* @is_cmd: signifies whether this is a command or data packet
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* @len: length og the packet
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* @work: work_struct for processing this packet
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* @list_node: list_head for placing this on a list
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* @ts_sec: seconds portion of the timestamp
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* @ts_nsec: nanoseconds portion of the timestamp
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*
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*/
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struct tx_pkt_info {
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struct sk_buff *skb;
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dma_addr_t dma_address;
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char is_cmd;
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uint32_t len;
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struct work_struct work;
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struct list_head list_node;
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unsigned ts_sec;
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unsigned long ts_nsec;
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};
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void msm_bam_dmux_set_bam_ops(struct bam_ops_if *ops);
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void msm_bam_dmux_deinit(void);
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void msm_bam_dmux_reinit(void);
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#endif /* _BAM_DMUX_PRIVATE_H */
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