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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (C) 2023 Intel Corporation */
#ifndef _IDPF_CONTROLQ_API_H_
#define _IDPF_CONTROLQ_API_H_
#include "idpf_mem.h"
struct idpf_hw;
/* Used for queue init, response and events */
enum idpf_ctlq_type {
IDPF_CTLQ_TYPE_MAILBOX_TX = 0,
IDPF_CTLQ_TYPE_MAILBOX_RX = 1,
IDPF_CTLQ_TYPE_CONFIG_TX = 2,
IDPF_CTLQ_TYPE_CONFIG_RX = 3,
IDPF_CTLQ_TYPE_EVENT_RX = 4,
IDPF_CTLQ_TYPE_RDMA_TX = 5,
IDPF_CTLQ_TYPE_RDMA_RX = 6,
IDPF_CTLQ_TYPE_RDMA_COMPL = 7
};
/* Generic Control Queue Structures */
struct idpf_ctlq_reg {
/* used for queue tracking */
u32 head;
u32 tail;
/* Below applies only to default mb (if present) */
u32 len;
u32 bah;
u32 bal;
u32 len_mask;
u32 len_ena_mask;
u32 head_mask;
};
/* Generic queue msg structure */
struct idpf_ctlq_msg {
u8 vmvf_type; /* represents the source of the message on recv */
#define IDPF_VMVF_TYPE_VF 0
#define IDPF_VMVF_TYPE_VM 1
#define IDPF_VMVF_TYPE_PF 2
u8 host_id;
/* 3b field used only when sending a message to CP - to be used in
* combination with target func_id to route the message
*/
#define IDPF_HOST_ID_MASK 0x7
u16 opcode;
u16 data_len; /* data_len = 0 when no payload is attached */
union {
u16 func_id; /* when sending a message */
u16 status; /* when receiving a message */
};
union {
struct {
u32 chnl_opcode;
u32 chnl_retval;
} mbx;
} cookie;
union {
#define IDPF_DIRECT_CTX_SIZE 16
#define IDPF_INDIRECT_CTX_SIZE 8
/* 16 bytes of context can be provided or 8 bytes of context
* plus the address of a DMA buffer
*/
u8 direct[IDPF_DIRECT_CTX_SIZE];
struct {
u8 context[IDPF_INDIRECT_CTX_SIZE];
struct idpf_dma_mem *payload;
} indirect;
} ctx;
};
/* Generic queue info structures */
/* MB, CONFIG and EVENT q do not have extended info */
struct idpf_ctlq_create_info {
enum idpf_ctlq_type type;
int id; /* absolute queue offset passed as input
* -1 for default mailbox if present
*/
u16 len; /* Queue length passed as input */
u16 buf_size; /* buffer size passed as input */
u64 base_address; /* output, HPA of the Queue start */
struct idpf_ctlq_reg reg; /* registers accessed by ctlqs */
int ext_info_size;
void *ext_info; /* Specific to q type */
};
/* Control Queue information */
struct idpf_ctlq_info {
struct list_head cq_list;
enum idpf_ctlq_type cq_type;
int q_id;
struct mutex cq_lock; /* control queue lock */
/* used for interrupt processing */
u16 next_to_use;
u16 next_to_clean;
u16 next_to_post; /* starting descriptor to post buffers
* to after recev
*/
struct idpf_dma_mem desc_ring; /* descriptor ring memory
* idpf_dma_mem is defined in OSdep.h
*/
union {
struct idpf_dma_mem **rx_buff;
struct idpf_ctlq_msg **tx_msg;
} bi;
u16 buf_size; /* queue buffer size */
u16 ring_size; /* Number of descriptors */
struct idpf_ctlq_reg reg; /* registers accessed by ctlqs */
};
/**
* enum idpf_mbx_opc - PF/VF mailbox commands
* @idpf_mbq_opc_send_msg_to_cp: used by PF or VF to send a message to its CP
*/
enum idpf_mbx_opc {
idpf_mbq_opc_send_msg_to_cp = 0x0801,
};
/* API supported for control queue management */
/* Will init all required q including default mb. "q_info" is an array of
* create_info structs equal to the number of control queues to be created.
*/
int idpf_ctlq_init(struct idpf_hw *hw, u8 num_q,
struct idpf_ctlq_create_info *q_info);
/* Allocate and initialize a single control queue, which will be added to the
* control queue list; returns a handle to the created control queue
*/
int idpf_ctlq_add(struct idpf_hw *hw,
struct idpf_ctlq_create_info *qinfo,
struct idpf_ctlq_info **cq);
/* Deinitialize and deallocate a single control queue */
void idpf_ctlq_remove(struct idpf_hw *hw,
struct idpf_ctlq_info *cq);
/* Sends messages to HW and will also free the buffer*/
int idpf_ctlq_send(struct idpf_hw *hw,
struct idpf_ctlq_info *cq,
u16 num_q_msg,
struct idpf_ctlq_msg q_msg[]);
/* Receives messages and called by interrupt handler/polling
* initiated by app/process. Also caller is supposed to free the buffers
*/
int idpf_ctlq_recv(struct idpf_ctlq_info *cq, u16 *num_q_msg,
struct idpf_ctlq_msg *q_msg);
/* Reclaims send descriptors on HW write back */
int idpf_ctlq_clean_sq(struct idpf_ctlq_info *cq, u16 *clean_count,
struct idpf_ctlq_msg *msg_status[]);
/* Indicate RX buffers are done being processed */
int idpf_ctlq_post_rx_buffs(struct idpf_hw *hw,
struct idpf_ctlq_info *cq,
u16 *buff_count,
struct idpf_dma_mem **buffs);
/* Will destroy all q including the default mb */
void idpf_ctlq_deinit(struct idpf_hw *hw);
#endif /* _IDPF_CONTROLQ_API_H_ */
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