/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright ( c ) 2018 MediaTek Inc .
*
*/
#ifndef __MTK_CMDQ_H__
#define __MTK_CMDQ_H__
#include <linux/mailbox_client.h>
#include <linux/mailbox/mtk-cmdq-mailbox.h>
#include <linux/timer.h>
#define CMDQ_ADDR_HIGH(addr) ((u32)(((addr) >> 16 ) & GENMASK(31 , 0 )))
#define CMDQ_ADDR_LOW(addr) ((u16)(addr) | BIT(1 ))
/*
* Every cmdq thread has its own SPRs ( Specific Purpose Registers ) ,
* so there are 4 * N ( threads ) SPRs in GCE that shares the same indexes below .
*/
#define CMDQ_THR_SPR_IDX0 (0 )
#define CMDQ_THR_SPR_IDX1 (1 )
#define CMDQ_THR_SPR_IDX2 (2 )
#define CMDQ_THR_SPR_IDX3 (3 )
struct cmdq_pkt;
enum cmdq_logic_op {
CMDQ_LOGIC_ASSIGN = 0 ,
CMDQ_LOGIC_ADD = 1 ,
CMDQ_LOGIC_SUBTRACT = 2 ,
CMDQ_LOGIC_MULTIPLY = 3 ,
CMDQ_LOGIC_XOR = 8 ,
CMDQ_LOGIC_NOT = 9 ,
CMDQ_LOGIC_OR = 10 ,
CMDQ_LOGIC_AND = 11 ,
CMDQ_LOGIC_LEFT_SHIFT = 12 ,
CMDQ_LOGIC_RIGHT_SHIFT = 13 ,
CMDQ_LOGIC_MAX,
};
struct cmdq_operand {
/* register type */
bool reg;
union {
/* index */
u16 idx;
/* value */
u16 value;
};
};
struct cmdq_client_reg {
u8 subsys;
u16 offset;
u16 size;
};
struct cmdq_client {
struct mbox_client client;
struct mbox_chan *chan;
};
#if IS_ENABLED(CONFIG_MTK_CMDQ)
/**
* cmdq_dev_get_client_reg ( ) - parse cmdq client reg from the device
* node of CMDQ client
* @ dev : device of CMDQ mailbox client
* @ client_reg : CMDQ client reg pointer
* @ idx : the index of desired reg
*
* Return : 0 for success ; else the error code is returned
*
* Help CMDQ client parsing the cmdq client reg
* from the device node of CMDQ client .
*/
int cmdq_dev_get_client_reg(struct device *dev,
struct cmdq_client_reg *client_reg, int idx);
/**
* cmdq_mbox_create ( ) - create CMDQ mailbox client and channel
* @ dev : device of CMDQ mailbox client
* @ index : index of CMDQ mailbox channel
*
* Return : CMDQ mailbox client pointer
*/
struct cmdq_client *cmdq_mbox_create(struct device *dev, int index);
/**
* cmdq_mbox_destroy ( ) - destroy CMDQ mailbox client and channel
* @ client : the CMDQ mailbox client
*/
void cmdq_mbox_destroy(struct cmdq_client *client);
/**
* cmdq_pkt_create ( ) - create a CMDQ packet
* @ client : the CMDQ mailbox client
* @ pkt : the CMDQ packet
* @ size : required CMDQ buffer size
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt, size_t size);
/**
* cmdq_pkt_destroy ( ) - destroy the CMDQ packet
* @ client : the CMDQ mailbox client
* @ pkt : the CMDQ packet
*/
void cmdq_pkt_destroy(struct cmdq_client *client, struct cmdq_pkt *pkt);
/**
* cmdq_pkt_write ( ) - append write command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ subsys : the CMDQ sub system code
* @ offset : register offset from CMDQ sub system
* @ value : the specified target register value
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value);
/**
* cmdq_pkt_write_mask ( ) - append write command with mask to the CMDQ packet
* @ pkt : the CMDQ packet
* @ subsys : the CMDQ sub system code
* @ offset : register offset from CMDQ sub system
* @ value : the specified target register value
* @ mask : the specified target register mask
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask);
/*
* cmdq_pkt_read_s ( ) - append read_s command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ high_addr_reg_idx : internal register ID which contains high address of pa
* @ addr_low : low address of pa
* @ reg_idx : the CMDQ internal register ID to cache read data
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
u16 reg_idx);
/**
* cmdq_pkt_write_s ( ) - append write_s command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ high_addr_reg_idx : internal register ID which contains high address of pa
* @ addr_low : low address of pa
* @ src_reg_idx : the CMDQ internal register ID which cache source value
*
* Return : 0 for success ; else the error code is returned
*
* Support write value to physical address without subsys . Use CMDQ_ADDR_HIGH ( )
* to get high address and call cmdq_pkt_assign ( ) to assign value into internal
* reg . Also use CMDQ_ADDR_LOW ( ) to get low address for addr_low parameter when
* call to this function .
*/
int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx);
/**
* cmdq_pkt_write_s_mask ( ) - append write_s with mask command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ high_addr_reg_idx : internal register ID which contains high address of pa
* @ addr_low : low address of pa
* @ src_reg_idx : the CMDQ internal register ID which cache source value
* @ mask : the specified target address mask , use U32_MAX if no need
*
* Return : 0 for success ; else the error code is returned
*
* Support write value to physical address without subsys . Use CMDQ_ADDR_HIGH ( )
* to get high address and call cmdq_pkt_assign ( ) to assign value into internal
* reg . Also use CMDQ_ADDR_LOW ( ) to get low address for addr_low parameter when
* call to this function .
*/
int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx, u32 mask);
/**
* cmdq_pkt_write_s_value ( ) - append write_s command to the CMDQ packet which
* write value to a physical address
* @ pkt : the CMDQ packet
* @ high_addr_reg_idx : internal register ID which contains high address of pa
* @ addr_low : low address of pa
* @ value : the specified target value
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
u16 addr_low, u32 value);
/**
* cmdq_pkt_write_s_mask_value ( ) - append write_s command with mask to the CMDQ
* packet which write value to a physical
* address
* @ pkt : the CMDQ packet
* @ high_addr_reg_idx : internal register ID which contains high address of pa
* @ addr_low : low address of pa
* @ value : the specified target value
* @ mask : the specified target mask
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
u16 addr_low, u32 value, u32 mask);
/**
* cmdq_pkt_mem_move ( ) - append memory move command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ src_addr : source address
* @ dst_addr : destination address
*
* Appends a CMDQ command to copy the value found in ` src_addr ` to ` dst_addr ` .
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr);
/**
* cmdq_pkt_wfe ( ) - append wait for event command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ event : the desired event type to wait
* @ clear : clear event or not after event arrive
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear);
/**
* cmdq_pkt_acquire_event ( ) - append acquire event command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ event : the desired event to be acquired
*
* User can use cmdq_pkt_acquire_event ( ) as ` mutex_lock ` and cmdq_pkt_clear_event ( )
* as ` mutex_unlock ` to protect some ` critical section ` instructions between them .
* cmdq_pkt_acquire_event ( ) would wait for event to be cleared .
* After event is cleared by cmdq_pkt_clear_event in other GCE threads ,
* cmdq_pkt_acquire_event ( ) would set event and keep executing next instruction .
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event);
/**
* cmdq_pkt_clear_event ( ) - append clear event command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ event : the desired event to be cleared
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event);
/**
* cmdq_pkt_set_event ( ) - append set event command to the CMDQ packet
* @ pkt : the CMDQ packet
* @ event : the desired event to be set
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_set_event(struct cmdq_pkt *pkt, u16 event);
/**
* cmdq_pkt_poll ( ) - Append polling command to the CMDQ packet , ask GCE to
* execute an instruction that wait for a specified
* hardware register to check for the value w / o mask .
* All GCE hardware threads will be blocked by this
* instruction .
* @ pkt : the CMDQ packet
* @ subsys : the CMDQ sub system code
* @ offset : register offset from CMDQ sub system
* @ value : the specified target register value
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value);
/**
* cmdq_pkt_poll_mask ( ) - Append polling command to the CMDQ packet , ask GCE to
* execute an instruction that wait for a specified
* hardware register to check for the value w / mask .
* All GCE hardware threads will be blocked by this
* instruction .
* @ pkt : the CMDQ packet
* @ subsys : the CMDQ sub system code
* @ offset : register offset from CMDQ sub system
* @ value : the specified target register value
* @ mask : the specified target register mask
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask);
/**
* cmdq_pkt_logic_command ( ) - Append logic command to the CMDQ packet , ask GCE to
* execute an instruction that store the result of logic operation
* with left and right operand into result_reg_idx .
* @ pkt : the CMDQ packet
* @ result_reg_idx : SPR index that store operation result of left_operand and right_operand
* @ left_operand : left operand
* @ s_op : the logic operator enum
* @ right_operand : right operand
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_logic_command(struct cmdq_pkt *pkt, u16 result_reg_idx,
struct cmdq_operand *left_operand,
enum cmdq_logic_op s_op,
struct cmdq_operand *right_operand);
/**
* cmdq_pkt_assign ( ) - Append logic assign command to the CMDQ packet , ask GCE
* to execute an instruction that set a constant value into
* internal register and use as value , mask or address in
* read / write instruction .
* @ pkt : the CMDQ packet
* @ reg_idx : the CMDQ internal register ID
* @ value : the specified value
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value);
/**
* cmdq_pkt_poll_addr ( ) - Append blocking POLL command to CMDQ packet
* @ pkt : the CMDQ packet
* @ addr : the hardware register address
* @ value : the specified target register value
* @ mask : the specified target register mask
*
* Appends a polling ( POLL ) command to the CMDQ packet and asks the GCE
* to execute an instruction that checks for the specified ` value ` ( with
* or without ` mask ` ) to appear in the specified hardware register ` addr ` .
* All GCE threads will be blocked by this instruction .
*
* Return : 0 for success or negative error code
*/
int cmdq_pkt_poll_addr(struct cmdq_pkt *pkt, dma_addr_t addr, u32 value, u32 mask);
/**
* cmdq_pkt_jump_abs ( ) - Append jump command to the CMDQ packet , ask GCE
* to execute an instruction that change current thread
* PC to a absolute physical address which should
* contains more instruction .
* @ pkt : the CMDQ packet
* @ addr : absolute physical address of target instruction buffer
* @ shift_pa : shift bits of physical address in CMDQ instruction . This value
* is got by cmdq_get_shift_pa ( ) .
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_jump_abs(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa);
/* This wrapper has to be removed after all users migrated to jump_abs */
static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
{
return cmdq_pkt_jump_abs(pkt, addr, shift_pa);
}
/**
* cmdq_pkt_jump_rel ( ) - Append jump command to the CMDQ packet , ask GCE
* to execute an instruction that change current thread
* PC to a physical address with relative offset . The
* target address should contains more instruction .
* @ pkt : the CMDQ packet
* @ offset : relative offset of target instruction buffer from current PC .
* @ shift_pa : shift bits of physical address in CMDQ instruction . This value
* is got by cmdq_get_shift_pa ( ) .
*
* Return : 0 for success ; else the error code is returned
*/
int cmdq_pkt_jump_rel(struct cmdq_pkt *pkt, s32 offset, u8 shift_pa);
/**
* cmdq_pkt_eoc ( ) - Append EOC and ask GCE to generate an IRQ at end of execution
* @ pkt : The CMDQ packet
*
* Appends an End Of Code ( EOC ) command to the CMDQ packet and asks the GCE
* to generate an interrupt at the end of the execution of all commands in
* the pipeline .
* The EOC command is usually appended to the end of the pipeline to notify
* that all commands are done .
*
* Return : 0 for success or negative error number
*/
int cmdq_pkt_eoc(struct cmdq_pkt *pkt);
#else /* IS_ENABLED(CONFIG_MTK_CMDQ) */
static inline int cmdq_dev_get_client_reg(struct device *dev,
struct cmdq_client_reg *client_reg, int idx)
{
return -ENODEV;
}
static inline struct cmdq_client *cmdq_mbox_create(struct device *dev, int index)
{
return ERR_PTR(-EINVAL);
}
static inline void cmdq_mbox_destroy(struct cmdq_client *client) { }
static inline int cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt, size_t size)
{
return -EINVAL;
}
static inline void cmdq_pkt_destroy(struct cmdq_client *client, struct cmdq_pkt *pkt) { }
static inline int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
{
return -ENOENT;
}
static inline int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask)
{
return -ENOENT;
}
static inline int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 reg_idx)
{
return -ENOENT;
}
static inline int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx)
{
return -ENOENT;
}
static inline int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx, u32 mask)
{
return -ENOENT;
}
static inline int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
u16 addr_low, u32 value)
{
return -ENOENT;
}
static inline int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
u16 addr_low, u32 value, u32 mask)
{
return -ENOENT;
}
static inline int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
{
return -EINVAL;
}
static inline int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
{
return -EINVAL;
}
static inline int cmdq_pkt_set_event(struct cmdq_pkt *pkt, u16 event)
{
return -EINVAL;
}
static inline int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value)
{
return -EINVAL;
}
static inline int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask)
{
return -EINVAL;
}
static inline int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value)
{
return -EINVAL;
}
static inline int cmdq_pkt_poll_addr(struct cmdq_pkt *pkt, dma_addr_t addr, u32 value, u32 mask)
{
return -EINVAL;
}
static inline int cmdq_pkt_jump_abs(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
{
return -EINVAL;
}
static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
{
return -EINVAL;
}
static inline int cmdq_pkt_jump_rel(struct cmdq_pkt *pkt, s32 offset, u8 shift_pa)
{
return -EINVAL;
}
static inline int cmdq_pkt_eoc(struct cmdq_pkt *pkt)
{
return -EINVAL;
}
#endif /* IS_ENABLED(CONFIG_MTK_CMDQ) */
#endif /* __MTK_CMDQ_H__ */
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