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usr
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linux-headers-5.4.0-216
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include
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net
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caif
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Filename :
caif_hsi.h
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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) ST-Ericsson AB 2010 * Author: Daniel Martensson / daniel.martensson@stericsson.com * Dmitry.Tarnyagin / dmitry.tarnyagin@stericsson.com */ #ifndef CAIF_HSI_H_ #define CAIF_HSI_H_ #include <net/caif/caif_layer.h> #include <net/caif/caif_device.h> #include <linux/atomic.h> /* * Maximum number of CAIF frames that can reside in the same HSI frame. */ #define CFHSI_MAX_PKTS 15 /* * Maximum number of bytes used for the frame that can be embedded in the * HSI descriptor. */ #define CFHSI_MAX_EMB_FRM_SZ 96 /* * Decides if HSI buffers should be prefilled with 0xFF pattern for easier * debugging. Both TX and RX buffers will be filled before the transfer. */ #define CFHSI_DBG_PREFILL 0 /* Structure describing a HSI packet descriptor. */ #pragma pack(1) /* Byte alignment. */ struct cfhsi_desc { u8 header; u8 offset; u16 cffrm_len[CFHSI_MAX_PKTS]; u8 emb_frm[CFHSI_MAX_EMB_FRM_SZ]; }; #pragma pack() /* Default alignment. */ /* Size of the complete HSI packet descriptor. */ #define CFHSI_DESC_SZ (sizeof(struct cfhsi_desc)) /* * Size of the complete HSI packet descriptor excluding the optional embedded * CAIF frame. */ #define CFHSI_DESC_SHORT_SZ (CFHSI_DESC_SZ - CFHSI_MAX_EMB_FRM_SZ) /* * Maximum bytes transferred in one transfer. */ #define CFHSI_MAX_CAIF_FRAME_SZ 4096 #define CFHSI_MAX_PAYLOAD_SZ (CFHSI_MAX_PKTS * CFHSI_MAX_CAIF_FRAME_SZ) /* Size of the complete HSI TX buffer. */ #define CFHSI_BUF_SZ_TX (CFHSI_DESC_SZ + CFHSI_MAX_PAYLOAD_SZ) /* Size of the complete HSI RX buffer. */ #define CFHSI_BUF_SZ_RX ((2 * CFHSI_DESC_SZ) + CFHSI_MAX_PAYLOAD_SZ) /* Bitmasks for the HSI descriptor. */ #define CFHSI_PIGGY_DESC (0x01 << 7) #define CFHSI_TX_STATE_IDLE 0 #define CFHSI_TX_STATE_XFER 1 #define CFHSI_RX_STATE_DESC 0 #define CFHSI_RX_STATE_PAYLOAD 1 /* Bitmasks for power management. */ #define CFHSI_WAKE_UP 0 #define CFHSI_WAKE_UP_ACK 1 #define CFHSI_WAKE_DOWN_ACK 2 #define CFHSI_AWAKE 3 #define CFHSI_WAKELOCK_HELD 4 #define CFHSI_SHUTDOWN 5 #define CFHSI_FLUSH_FIFO 6 #ifndef CFHSI_INACTIVITY_TOUT #define CFHSI_INACTIVITY_TOUT (1 * HZ) #endif /* CFHSI_INACTIVITY_TOUT */ #ifndef CFHSI_WAKE_TOUT #define CFHSI_WAKE_TOUT (3 * HZ) #endif /* CFHSI_WAKE_TOUT */ #ifndef CFHSI_MAX_RX_RETRIES #define CFHSI_MAX_RX_RETRIES (10 * HZ) #endif /* Structure implemented by the CAIF HSI driver. */ struct cfhsi_cb_ops { void (*tx_done_cb) (struct cfhsi_cb_ops *drv); void (*rx_done_cb) (struct cfhsi_cb_ops *drv); void (*wake_up_cb) (struct cfhsi_cb_ops *drv); void (*wake_down_cb) (struct cfhsi_cb_ops *drv); }; /* Structure implemented by HSI device. */ struct cfhsi_ops { int (*cfhsi_up) (struct cfhsi_ops *dev); int (*cfhsi_down) (struct cfhsi_ops *dev); int (*cfhsi_tx) (u8 *ptr, int len, struct cfhsi_ops *dev); int (*cfhsi_rx) (u8 *ptr, int len, struct cfhsi_ops *dev); int (*cfhsi_wake_up) (struct cfhsi_ops *dev); int (*cfhsi_wake_down) (struct cfhsi_ops *dev); int (*cfhsi_get_peer_wake) (struct cfhsi_ops *dev, bool *status); int (*cfhsi_fifo_occupancy) (struct cfhsi_ops *dev, size_t *occupancy); int (*cfhsi_rx_cancel)(struct cfhsi_ops *dev); struct cfhsi_cb_ops *cb_ops; }; /* Structure holds status of received CAIF frames processing */ struct cfhsi_rx_state { int state; int nfrms; int pld_len; int retries; bool piggy_desc; }; /* Priority mapping */ enum { CFHSI_PRIO_CTL = 0, CFHSI_PRIO_VI, CFHSI_PRIO_VO, CFHSI_PRIO_BEBK, CFHSI_PRIO_LAST, }; struct cfhsi_config { u32 inactivity_timeout; u32 aggregation_timeout; u32 head_align; u32 tail_align; u32 q_high_mark; u32 q_low_mark; }; /* Structure implemented by CAIF HSI drivers. */ struct cfhsi { struct caif_dev_common cfdev; struct net_device *ndev; struct platform_device *pdev; struct sk_buff_head qhead[CFHSI_PRIO_LAST]; struct cfhsi_cb_ops cb_ops; struct cfhsi_ops *ops; int tx_state; struct cfhsi_rx_state rx_state; struct cfhsi_config cfg; int rx_len; u8 *rx_ptr; u8 *tx_buf; u8 *rx_buf; u8 *rx_flip_buf; spinlock_t lock; int flow_off_sent; struct list_head list; struct work_struct wake_up_work; struct work_struct wake_down_work; struct work_struct out_of_sync_work; struct workqueue_struct *wq; wait_queue_head_t wake_up_wait; wait_queue_head_t wake_down_wait; wait_queue_head_t flush_fifo_wait; struct timer_list inactivity_timer; struct timer_list rx_slowpath_timer; /* TX aggregation */ int aggregation_len; struct timer_list aggregation_timer; unsigned long bits; }; extern struct platform_driver cfhsi_driver; /** * enum ifla_caif_hsi - CAIF HSI NetlinkRT parameters. * @IFLA_CAIF_HSI_INACTIVITY_TOUT: Inactivity timeout before * taking the HSI wakeline down, in milliseconds. * When using RT Netlink to create, destroy or configure a CAIF HSI interface, * enum ifla_caif_hsi is used to specify the configuration attributes. */ enum ifla_caif_hsi { __IFLA_CAIF_HSI_UNSPEC, __IFLA_CAIF_HSI_INACTIVITY_TOUT, __IFLA_CAIF_HSI_AGGREGATION_TOUT, __IFLA_CAIF_HSI_HEAD_ALIGN, __IFLA_CAIF_HSI_TAIL_ALIGN, __IFLA_CAIF_HSI_QHIGH_WATERMARK, __IFLA_CAIF_HSI_QLOW_WATERMARK, __IFLA_CAIF_HSI_MAX }; struct cfhsi_ops *cfhsi_get_ops(void); #endif /* CAIF_HSI_H_ */