diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h new file mode 100644 index 0000000000..7f8135788e --- /dev/null +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h @@ -0,0 +1,180 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Marvell Octeon EP (EndPoint) Ethernet Driver + * + * Copyright (C) 2020 Marvell. + * + */ + #ifndef __OCTEP_CTRL_MBOX_H__ +#define __OCTEP_CTRL_MBOX_H__ + +/* barmem structure + * |===========================================| + * |Info (16 + 120 + 120 = 256 bytes) | + * |-------------------------------------------| + * |magic number (8 bytes) | + * |bar memory size (4 bytes) | + * |reserved (4 bytes) | + * |-------------------------------------------| + * |host version (8 bytes) | + * |host status (8 bytes) | + * |host reserved (104 bytes) | + * |-------------------------------------------| + * |fw version (8 bytes) | + * |fw status (8 bytes) | + * |fw reserved (104 bytes) | + * |===========================================| + * |Host to Fw Queue info (16 bytes) | + * |-------------------------------------------| + * |producer index (4 bytes) | + * |consumer index (4 bytes) | + * |max element size (4 bytes) | + * |reserved (4 bytes) | + * |===========================================| + * |Fw to Host Queue info (16 bytes) | + * |-------------------------------------------| + * |producer index (4 bytes) | + * |consumer index (4 bytes) | + * |max element size (4 bytes) | + * |reserved (4 bytes) | + * |===========================================| + * |Host to Fw Queue ((total size-288/2) bytes)| + * |-------------------------------------------| + * | | + * |===========================================| + * |===========================================| + * |Fw to Host Queue ((total size-288/2) bytes)| + * |-------------------------------------------| + * | | + * |===========================================| + */ + +#define OCTEP_CTRL_MBOX_MAGIC_NUMBER 0xdeaddeadbeefbeefull + +/* Valid request message */ +#define OCTEP_CTRL_MBOX_MSG_HDR_FLAG_REQ BIT(0) +/* Valid response message */ +#define OCTEP_CTRL_MBOX_MSG_HDR_FLAG_RESP BIT(1) +/* Valid notification, no response required */ +#define OCTEP_CTRL_MBOX_MSG_HDR_FLAG_NOTIFY BIT(2) +/* Valid custom message */ +#define OCTEP_CTRL_MBOX_MSG_HDR_FLAG_CUSTOM BIT(3) + +#define OCTEP_CTRL_MBOX_MSG_DESC_MAX 4 + +enum octep_ctrl_mbox_status { + OCTEP_CTRL_MBOX_STATUS_INVALID = 0, + OCTEP_CTRL_MBOX_STATUS_INIT, + OCTEP_CTRL_MBOX_STATUS_READY, + OCTEP_CTRL_MBOX_STATUS_UNINIT +}; + +/* mbox message */ +union octep_ctrl_mbox_msg_hdr { + u64 words[2]; + struct { + /* must be 0 */ + u16 reserved1:15; + /* vf_idx is valid if 1 */ + u16 is_vf:1; + /* sender vf index 0-(n-1), 0 if (is_vf==0) */ + u16 vf_idx; + /* total size of message excluding header */ + u32 sz; + /* OCTEP_CTRL_MBOX_MSG_HDR_FLAG_* */ + u32 flags; + /* identifier to match responses */ + u16 msg_id; + u16 reserved2; + } s; +}; + +/* mbox message buffer */ +struct octep_ctrl_mbox_msg_buf { + u32 reserved1; + u16 reserved2; + /* size of buffer */ + u16 sz; + /* pointer to message buffer */ + void *msg; +}; + +/* mbox message */ +struct octep_ctrl_mbox_msg { + /* mbox transaction header */ + union octep_ctrl_mbox_msg_hdr hdr; + /* number of sg buffer's */ + int sg_num; + /* message buffer's */ + struct octep_ctrl_mbox_msg_buf sg_list[OCTEP_CTRL_MBOX_MSG_DESC_MAX]; +}; + +/* Mbox queue */ +struct octep_ctrl_mbox_q { + /* size of queue buffer */ + u32 sz; + /* producer address in bar mem */ + u8 __iomem *hw_prod; + /* consumer address in bar mem */ + u8 __iomem *hw_cons; + /* q base address in bar mem */ + u8 __iomem *hw_q; +}; + +struct octep_ctrl_mbox { + /* control plane version */ + u64 version; + /* size of bar memory */ + u32 barmem_sz; + /* pointer to BAR memory */ + u8 __iomem *barmem; + /* host-to-fw queue */ + struct octep_ctrl_mbox_q h2fq; + /* fw-to-host queue */ + struct octep_ctrl_mbox_q f2hq; + /* lock for h2fq */ + struct mutex h2fq_lock; + /* lock for f2hq */ + struct mutex f2hq_lock; + /* Min control plane version supported by firmware */ + u32 min_fw_version; + /* Max control plane version supported by firmware */ + u32 max_fw_version; +}; + +/* Initialize control mbox. + * + * @param mbox: non-null pointer to struct octep_ctrl_mbox. + * + * return value: 0 on success, -errno on failure. + */ +int octep_ctrl_mbox_init(struct octep_ctrl_mbox *mbox); + +/* Send mbox message. + * + * @param mbox: non-null pointer to struct octep_ctrl_mbox. + * @param msg: non-null pointer to struct octep_ctrl_mbox_msg. + * Caller should fill msg.sz and msg.desc.sz for each message. + * + * return value: 0 on success, -errno on failure. + */ +int octep_ctrl_mbox_send(struct octep_ctrl_mbox *mbox, struct octep_ctrl_mbox_msg *msg); + +/* Retrieve mbox message. + * + * @param mbox: non-null pointer to struct octep_ctrl_mbox. + * @param msg: non-null pointer to struct octep_ctrl_mbox_msg. + * Caller should fill msg.sz and msg.desc.sz for each message. + * + * return value: 0 on success, -errno on failure. + */ +int octep_ctrl_mbox_recv(struct octep_ctrl_mbox *mbox, struct octep_ctrl_mbox_msg *msg); + +/* Uninitialize control mbox. + * + * @param mbox: non-null pointer to struct octep_ctrl_mbox. + * + * return value: 0 on success, -errno on failure. + */ +int octep_ctrl_mbox_uninit(struct octep_ctrl_mbox *mbox); + +#endif /* __OCTEP_CTRL_MBOX_H__ */ |