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/* SPDX-License-Identifier: GPL-2.0-only
*
* Copyright (c) 2021, MediaTek Inc.
* Copyright (c) 2021-2022, Intel Corporation.
*
* Authors:
* Haijun Liu <haijun.liu@mediatek.com>
* Moises Veleta <moises.veleta@intel.com>
* Ricardo Martinez <ricardo.martinez@linux.intel.com>
* Sreehari Kancharla <sreehari.kancharla@intel.com>
*
* Contributors:
* Amir Hanania <amir.hanania@intel.com>
* Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
* Eliot Lee <eliot.lee@intel.com>
*/
#ifndef __T7XX_HIF_CLDMA_H__
#define __T7XX_HIF_CLDMA_H__
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/types.h>
#include "t7xx_cldma.h"
#include "t7xx_pci.h"
/**
* enum cldma_id - Identifiers for CLDMA HW units.
* @CLDMA_ID_MD: Modem control channel.
* @CLDMA_ID_AP: Application Processor control channel (not used at the moment).
* @CLDMA_NUM: Number of CLDMA HW units available.
*/
enum cldma_id {
CLDMA_ID_MD,
CLDMA_ID_AP,
CLDMA_NUM
};
struct cldma_gpd {
u8 flags;
u8 not_used1;
__le16 rx_data_allow_len;
__le32 next_gpd_ptr_h;
__le32 next_gpd_ptr_l;
__le32 data_buff_bd_ptr_h;
__le32 data_buff_bd_ptr_l;
__le16 data_buff_len;
__le16 not_used2;
};
struct cldma_request {
struct cldma_gpd *gpd; /* Virtual address for CPU */
dma_addr_t gpd_addr; /* Physical address for DMA */
struct sk_buff *skb;
dma_addr_t mapped_buff;
struct list_head entry;
};
struct cldma_ring {
struct list_head gpd_ring; /* Ring of struct cldma_request */
unsigned int length; /* Number of struct cldma_request */
int pkt_size;
};
struct cldma_queue {
struct cldma_ctrl *md_ctrl;
enum mtk_txrx dir;
unsigned int index;
struct cldma_ring *tr_ring;
struct cldma_request *tr_done;
struct cldma_request *rx_refill;
struct cldma_request *tx_next;
int budget; /* Same as ring buffer size by default */
spinlock_t ring_lock;
wait_queue_head_t req_wq; /* Only for TX */
struct workqueue_struct *worker;
struct work_struct cldma_work;
};
struct cldma_ctrl {
enum cldma_id hif_id;
struct device *dev;
struct t7xx_pci_dev *t7xx_dev;
struct cldma_queue txq[CLDMA_TXQ_NUM];
struct cldma_queue rxq[CLDMA_RXQ_NUM];
unsigned short txq_active;
unsigned short rxq_active;
unsigned short txq_started;
spinlock_t cldma_lock; /* Protects CLDMA structure */
/* Assumes T/R GPD/BD/SPD have the same size */
struct dma_pool *gpd_dmapool;
struct cldma_ring tx_ring[CLDMA_TXQ_NUM];
struct cldma_ring rx_ring[CLDMA_RXQ_NUM];
struct md_pm_entity *pm_entity;
struct t7xx_cldma_hw hw_info;
bool is_late_init;
int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb);
};
#define GPD_FLAGS_HWO BIT(0)
#define GPD_FLAGS_IOC BIT(7)
#define GPD_DMAPOOL_ALIGN 16
#define CLDMA_MTU 3584 /* 3.5kB */
int t7xx_cldma_alloc(enum cldma_id hif_id, struct t7xx_pci_dev *t7xx_dev);
void t7xx_cldma_hif_hw_init(struct cldma_ctrl *md_ctrl);
int t7xx_cldma_init(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_exit(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_switch_cfg(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_start(struct cldma_ctrl *md_ctrl);
int t7xx_cldma_stop(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_reset(struct cldma_ctrl *md_ctrl);
void t7xx_cldma_set_recv_skb(struct cldma_ctrl *md_ctrl,
int (*recv_skb)(struct cldma_queue *queue, struct sk_buff *skb));
int t7xx_cldma_send_skb(struct cldma_ctrl *md_ctrl, int qno, struct sk_buff *skb);
void t7xx_cldma_stop_all_qs(struct cldma_ctrl *md_ctrl, enum mtk_txrx tx_rx);
void t7xx_cldma_clear_all_qs(struct cldma_ctrl *md_ctrl, enum mtk_txrx tx_rx);
#endif /* __T7XX_HIF_CLDMA_H__ */
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