1 files changed, 356 insertions, 0 deletions
diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
new file mode 100644
index 000000000..997c7b37a
--- /dev/null
+++ b/drivers/net/fjes/fjes_hw.h
@@ -0,0 +1,356 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  FUJITSU Extended Socket Network Device driver
+ *  Copyright (c) 2015 FUJITSU LIMITED
+ */
+
+#ifndef FJES_HW_H_
+#define FJES_HW_H_
+
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include <linux/vmalloc.h>
+
+#include "fjes_regs.h"
+
+struct fjes_hw;
+
+#define EP_BUFFER_SUPPORT_VLAN_MAX 4
+#define EP_BUFFER_INFO_SIZE 4096
+
+#define FJES_DEBUG_PAGE_SIZE 4096
+#define FJES_DEBUG_BUFFER_SIZE	(16 * FJES_DEBUG_PAGE_SIZE)
+
+#define FJES_DEVICE_RESET_TIMEOUT  ((17 + 1) * 3 * 8) /* sec */
+#define FJES_COMMAND_REQ_TIMEOUT  ((5 + 1) * 3 * 8) /* sec */
+#define FJES_COMMAND_REQ_BUFF_TIMEOUT	(60 * 3) /* sec */
+#define FJES_COMMAND_EPSTOP_WAIT_TIMEOUT	(1) /* sec */
+
+#define FJES_CMD_REQ_ERR_INFO_PARAM  (0x0001)
+#define FJES_CMD_REQ_ERR_INFO_STATUS (0x0002)
+
+#define FJES_CMD_REQ_RES_CODE_NORMAL (0)
+#define FJES_CMD_REQ_RES_CODE_BUSY   (1)
+
+#define FJES_ZONING_STATUS_DISABLE	(0x00)
+#define FJES_ZONING_STATUS_ENABLE	(0x01)
+#define FJES_ZONING_STATUS_INVALID	(0xFF)
+
+#define FJES_ZONING_ZONE_TYPE_NONE (0xFF)
+
+#define FJES_TX_DELAY_SEND_NONE		(0)
+#define FJES_TX_DELAY_SEND_PENDING	(1)
+
+#define FJES_RX_STOP_REQ_NONE		(0x0)
+#define FJES_RX_STOP_REQ_DONE		(0x1)
+#define FJES_RX_STOP_REQ_REQUEST	(0x2)
+#define FJES_RX_POLL_WORK		(0x4)
+#define FJES_RX_MTU_CHANGING_DONE	(0x8)
+
+#define EP_BUFFER_SIZE \
+	(((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \
+		/ EP_BUFFER_INFO_SIZE) * EP_BUFFER_INFO_SIZE)
+
+#define EP_RING_NUM(buffer_size, frame_size) \
+		(u32)((buffer_size) / (frame_size))
+#define EP_RING_INDEX(_num, _max) (((_num) + (_max)) % (_max))
+#define EP_RING_INDEX_INC(_num, _max) \
+	((_num) = EP_RING_INDEX((_num) + 1, (_max)))
+#define EP_RING_FULL(_head, _tail, _max)				\
+	(0 == EP_RING_INDEX(((_tail) - (_head)), (_max)))
+#define EP_RING_EMPTY(_head, _tail, _max) \
+	(1 == EP_RING_INDEX(((_tail) - (_head)), (_max)))
+
+#define FJES_MTU_TO_BUFFER_SIZE(mtu) \
+	(ETH_HLEN + VLAN_HLEN + (mtu) + ETH_FCS_LEN)
+#define FJES_MTU_TO_FRAME_SIZE(mtu) \
+	(sizeof(struct esmem_frame) + FJES_MTU_TO_BUFFER_SIZE(mtu))
+#define FJES_MTU_DEFINE(size) \
+	((size) - sizeof(struct esmem_frame) - \
+	(ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN))
+
+#define FJES_DEV_COMMAND_INFO_REQ_LEN	(4)
+#define FJES_DEV_COMMAND_INFO_RES_LEN(epnum) (8 + 2 * (epnum))
+#define FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(txb, rxb) \
+	(24 + (8 * ((txb) / EP_BUFFER_INFO_SIZE + (rxb) / EP_BUFFER_INFO_SIZE)))
+#define FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN	(8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN	(8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN	(8)
+
+#define FJES_DEV_REQ_BUF_SIZE(maxep) \
+	FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(EP_BUFFER_SIZE, EP_BUFFER_SIZE)
+#define FJES_DEV_RES_BUF_SIZE(maxep) \
+	FJES_DEV_COMMAND_INFO_RES_LEN(maxep)
+
+#define FJES_DEV_COMMAND_START_DBG_REQ_LEN(byte) \
+	(16 + (8 * (byte) / FJES_DEBUG_PAGE_SIZE))
+#define FJES_DEV_COMMAND_START_DBG_RES_LEN (8)
+#define FJES_DEV_COMMAND_STOP_DBG_REQ_LEN (4)
+#define FJES_DEV_COMMAND_STOP_DBG_RES_LEN (8)
+
+/* Frame & MTU */
+struct esmem_frame {
+	__le32 frame_size;
+	u8 frame_data[];
+};
+
+/* EP partner status */
+enum ep_partner_status {
+	EP_PARTNER_UNSHARE,
+	EP_PARTNER_SHARED,
+	EP_PARTNER_WAITING,
+	EP_PARTNER_COMPLETE,
+	EP_PARTNER_STATUS_MAX,
+};
+
+/* shared status region */
+struct fjes_device_shared_info {
+	int epnum;
+	u8 ep_status[];
+};
+
+/* structures for command control request data*/
+union fjes_device_command_req {
+	struct {
+		__le32 length;
+	} info;
+	struct {
+		__le32 length;
+		__le32 epid;
+		__le64 buffer[];
+	} share_buffer;
+	struct {
+		__le32 length;
+		__le32 epid;
+	} unshare_buffer;
+	struct {
+		__le32 length;
+		__le32 mode;
+		__le64 buffer_len;
+		__le64 buffer[];
+	} start_trace;
+	struct {
+		__le32 length;
+	} stop_trace;
+};
+
+/* structures for command control response data */
+union fjes_device_command_res {
+	struct {
+		__le32 length;
+		__le32 code;
+		struct {
+			u8 es_status;
+			u8 zone;
+		} info[];
+	} info;
+	struct {
+		__le32 length;
+		__le32 code;
+	} share_buffer;
+	struct {
+		__le32 length;
+		__le32 code;
+	} unshare_buffer;
+	struct {
+		__le32 length;
+		__le32 code;
+	} start_trace;
+	struct {
+		__le32 length;
+		__le32 code;
+	} stop_trace;
+};
+
+/* request command type */
+enum fjes_dev_command_request_type {
+	FJES_CMD_REQ_INFO		= 0x0001,
+	FJES_CMD_REQ_SHARE_BUFFER	= 0x0002,
+	FJES_CMD_REQ_UNSHARE_BUFFER	= 0x0004,
+	FJES_CMD_REQ_START_DEBUG	= 0x0100,
+	FJES_CMD_REQ_STOP_DEBUG		= 0x0200,
+};
+
+/* parameter for command control */
+struct fjes_device_command_param {
+	u32 req_len;
+	phys_addr_t req_start;
+	u32 res_len;
+	phys_addr_t res_start;
+	phys_addr_t share_start;
+};
+
+/* error code for command control */
+enum fjes_dev_command_response_e {
+	FJES_CMD_STATUS_UNKNOWN,
+	FJES_CMD_STATUS_NORMAL,
+	FJES_CMD_STATUS_TIMEOUT,
+	FJES_CMD_STATUS_ERROR_PARAM,
+	FJES_CMD_STATUS_ERROR_STATUS,
+};
+
+/* EP buffer information */
+union ep_buffer_info {
+	u8 raw[EP_BUFFER_INFO_SIZE];
+
+	struct _ep_buffer_info_common_t {
+		u32 version;
+	} common;
+
+	struct _ep_buffer_info_v1_t {
+		u32 version;
+		u32 info_size;
+
+		u32 buffer_size;
+		u16 count_max;
+
+		u16 _rsv_1;
+
+		u32 frame_max;
+		u8 mac_addr[ETH_ALEN];
+
+		u16 _rsv_2;
+		u32 _rsv_3;
+
+		u16 tx_status;
+		u16 rx_status;
+
+		u32 head;
+		u32 tail;
+
+		u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
+
+	} v1i;
+
+};
+
+/* statistics of EP */
+struct fjes_drv_ep_stats {
+	u64 com_regist_buf_exec;
+	u64 com_unregist_buf_exec;
+	u64 send_intr_rx;
+	u64 send_intr_unshare;
+	u64 send_intr_zoneupdate;
+	u64 recv_intr_rx;
+	u64 recv_intr_unshare;
+	u64 recv_intr_stop;
+	u64 recv_intr_zoneupdate;
+	u64 tx_buffer_full;
+	u64 tx_dropped_not_shared;
+	u64 tx_dropped_ver_mismatch;
+	u64 tx_dropped_buf_size_mismatch;
+	u64 tx_dropped_vlanid_mismatch;
+};
+
+/* buffer pair for Extended Partition */
+struct ep_share_mem_info {
+	struct epbuf_handler {
+		void *buffer;
+		size_t size;
+		union ep_buffer_info *info;
+		u8 *ring;
+	} tx, rx;
+
+	struct rtnl_link_stats64 net_stats;
+	struct fjes_drv_ep_stats ep_stats;
+
+	u16 tx_status_work;
+
+	u8 es_status;
+	u8 zone;
+};
+
+struct es_device_trace {
+	u32 record_num;
+	u32 current_record;
+	u32 status_flag;
+	u32 _rsv;
+
+	struct {
+			u16 epid;
+			u16 dir_offset;
+			u32 data;
+			u64 tsc;
+	} record[];
+};
+
+struct fjes_hw_info {
+	struct fjes_device_shared_info *share;
+	union fjes_device_command_req *req_buf;
+	u64 req_buf_size;
+	union fjes_device_command_res *res_buf;
+	u64 res_buf_size;
+
+	int *my_epid;
+	int *max_epid;
+
+	struct es_device_trace *trace;
+	u64 trace_size;
+
+	struct mutex lock; /* buffer lock*/
+
+	unsigned long buffer_share_bit;
+	unsigned long buffer_unshare_reserve_bit;
+};
+
+struct fjes_hw {
+	void *back;
+
+	unsigned long txrx_stop_req_bit;
+	unsigned long epstop_req_bit;
+	struct work_struct update_zone_task;
+	struct work_struct epstop_task;
+
+	int my_epid;
+	int max_epid;
+
+	struct ep_share_mem_info *ep_shm_info;
+
+	struct fjes_hw_resource {
+		u64 start;
+		u64 size;
+		int irq;
+	} hw_res;
+
+	u8 *base;
+
+	struct fjes_hw_info hw_info;
+
+	spinlock_t rx_status_lock; /* spinlock for rx_status */
+
+	u32 debug_mode;
+};
+
+int fjes_hw_init(struct fjes_hw *);
+void fjes_hw_exit(struct fjes_hw *);
+int fjes_hw_reset(struct fjes_hw *);
+int fjes_hw_request_info(struct fjes_hw *);
+int fjes_hw_register_buff_addr(struct fjes_hw *, int,
+			       struct ep_share_mem_info *);
+int fjes_hw_unregister_buff_addr(struct fjes_hw *, int);
+void fjes_hw_init_command_registers(struct fjes_hw *,
+				    struct fjes_device_command_param *);
+void fjes_hw_setup_epbuf(struct epbuf_handler *, const u8 *, u32);
+int fjes_hw_raise_interrupt(struct fjes_hw *, int, enum REG_ICTL_MASK);
+void fjes_hw_set_irqmask(struct fjes_hw *, enum REG_ICTL_MASK, bool);
+u32 fjes_hw_capture_interrupt_status(struct fjes_hw *);
+void fjes_hw_raise_epstop(struct fjes_hw *);
+int fjes_hw_wait_epstop(struct fjes_hw *);
+enum ep_partner_status
+	fjes_hw_get_partner_ep_status(struct fjes_hw *, int);
+
+bool fjes_hw_epid_is_same_zone(struct fjes_hw *, int);
+int fjes_hw_epid_is_shared(struct fjes_device_shared_info *, int);
+bool fjes_hw_check_epbuf_version(struct epbuf_handler *, u32);
+bool fjes_hw_check_mtu(struct epbuf_handler *, u32);
+bool fjes_hw_check_vlan_id(struct epbuf_handler *, u16);
+bool fjes_hw_set_vlan_id(struct epbuf_handler *, u16);
+void fjes_hw_del_vlan_id(struct epbuf_handler *, u16);
+bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *);
+void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *, size_t *);
+void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *);
+int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *, void *, size_t);
+
+int fjes_hw_start_debug(struct fjes_hw *);
+int fjes_hw_stop_debug(struct fjes_hw *);
+#endif /* FJES_HW_H_ */