diff options
Diffstat (limited to 'drivers/net/wwan/t7xx/t7xx_hif_cldma.h')
| -rw-r--r-- | drivers/net/wwan/t7xx/t7xx_hif_cldma.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/net/wwan/t7xx/t7xx_hif_cldma.h b/drivers/net/wwan/t7xx/t7xx_hif_cldma.h new file mode 100644 index 000000000000..47a35e552da7 --- /dev/null +++ b/drivers/net/wwan/t7xx/t7xx_hif_cldma.h @@ -0,0 +1,127 @@ +/* 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__ */ |