1 /* Broadcom NetXtreme-C/E network driver.
2  *
3  * Copyright (c) 2016-2018 Broadcom Limited
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation.
8  */
9 
10 #ifndef BNXT_ULP_H
11 #define BNXT_ULP_H
12 
13 #define BNXT_ROCE_ULP	0
14 #define BNXT_MAX_ULP	1
15 
16 #define BNXT_MIN_ROCE_CP_RINGS	2
17 #define BNXT_MIN_ROCE_STAT_CTXS	1
18 
19 struct hwrm_async_event_cmpl;
20 struct bnxt;
21 
22 struct bnxt_msix_entry {
23 	u32	vector;
24 	u32	ring_idx;
25 	u32	db_offset;
26 };
27 
28 struct bnxt_ulp_ops {
29 	/* async_notifier() cannot sleep (in BH context) */
30 	void (*ulp_async_notifier)(void *, struct hwrm_async_event_cmpl *);
31 	void (*ulp_stop)(void *);
32 	void (*ulp_start)(void *);
33 	void (*ulp_sriov_config)(void *, int);
34 	void (*ulp_irq_stop)(void *);
35 	void (*ulp_irq_restart)(void *, struct bnxt_msix_entry *);
36 };
37 
38 struct bnxt_fw_msg {
39 	void	*msg;
40 	int	msg_len;
41 	void	*resp;
42 	int	resp_max_len;
43 	int	timeout;
44 };
45 
46 struct bnxt_ulp {
47 	void		*handle;
48 	struct bnxt_ulp_ops __rcu *ulp_ops;
49 	unsigned long	*async_events_bmap;
50 	u16		max_async_event_id;
51 	u16		msix_requested;
52 	u16		msix_base;
53 	atomic_t	ref_count;
54 };
55 
56 struct bnxt_en_dev {
57 	struct net_device *net;
58 	struct pci_dev *pdev;
59 	u32 flags;
60 	#define BNXT_EN_FLAG_ROCEV1_CAP		0x1
61 	#define BNXT_EN_FLAG_ROCEV2_CAP		0x2
62 	#define BNXT_EN_FLAG_ROCE_CAP		(BNXT_EN_FLAG_ROCEV1_CAP | \
63 						 BNXT_EN_FLAG_ROCEV2_CAP)
64 	#define BNXT_EN_FLAG_MSIX_REQUESTED	0x4
65 	#define BNXT_EN_FLAG_ULP_STOPPED	0x8
66 	const struct bnxt_en_ops	*en_ops;
67 	struct bnxt_ulp			*ulp_tbl;
68 	int				l2_db_size;	/* Doorbell BAR size in
69 							 * bytes mapped by L2
70 							 * driver.
71 							 */
72 	int				l2_db_size_nc;	/* Doorbell BAR size in
73 							 * bytes mapped as non-
74 							 * cacheable.
75 							 */
76 };
77 
78 struct bnxt_en_ops {
79 	int (*bnxt_register_device)(struct bnxt_en_dev *edev,
80 				    struct bnxt_ulp_ops *ulp_ops, void *handle);
81 	int (*bnxt_unregister_device)(struct bnxt_en_dev *edev);
82 	int (*bnxt_request_msix)(struct bnxt_en_dev *edev,
83 				 struct bnxt_msix_entry *ent, int num_msix);
84 	void (*bnxt_free_msix)(struct bnxt_en_dev *edev);
85 	int (*bnxt_send_fw_msg)(struct bnxt_en_dev *edev,
86 				struct bnxt_fw_msg *fw_msg);
87 	int (*bnxt_register_fw_async_events)(struct bnxt_en_dev *edev,
88 					     unsigned long *events_bmap, u16 max_id);
89 };
90 
91 static inline bool bnxt_ulp_registered(struct bnxt_en_dev *edev)
92 {
93 	if (edev && edev->ulp_tbl)
94 		return true;
95 	return false;
96 }
97 
98 int bnxt_get_ulp_msix_num(struct bnxt *bp);
99 int bnxt_get_ulp_msix_base(struct bnxt *bp);
100 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp);
101 void bnxt_ulp_stop(struct bnxt *bp);
102 void bnxt_ulp_start(struct bnxt *bp, int err);
103 void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs);
104 void bnxt_ulp_irq_stop(struct bnxt *bp);
105 void bnxt_ulp_irq_restart(struct bnxt *bp, int err);
106 void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl);
107 void bnxt_rdma_aux_device_uninit(struct bnxt *bp);
108 void bnxt_rdma_aux_device_init(struct bnxt *bp);
109 #endif
110