1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (c) 2015 Quantenna Communications. All rights reserved. */
3 
4 #ifndef QTNFMAC_BUS_H
5 #define QTNFMAC_BUS_H
6 
7 #include <linux/netdevice.h>
8 #include <linux/workqueue.h>
9 
10 #include "trans.h"
11 #include "core.h"
12 
13 #define QTNF_MAX_MAC		3
14 
15 #define HBM_FRAME_META_MAGIC_PATTERN_S	0xAB
16 #define HBM_FRAME_META_MAGIC_PATTERN_E	0xBA
17 
18 struct qtnf_frame_meta_info {
19 	u8 magic_s;
20 	u8 ifidx;
21 	u8 macid;
22 	u8 magic_e;
23 } __packed;
24 
25 enum qtnf_fw_state {
26 	QTNF_FW_STATE_DETACHED,
27 	QTNF_FW_STATE_BOOT_DONE,
28 	QTNF_FW_STATE_ACTIVE,
29 	QTNF_FW_STATE_RUNNING,
30 	QTNF_FW_STATE_DEAD,
31 };
32 
33 struct qtnf_bus;
34 
35 struct qtnf_bus_ops {
36 	/* mgmt methods */
37 	int (*preinit)(struct qtnf_bus *);
38 	void (*stop)(struct qtnf_bus *);
39 
40 	/* control path methods */
41 	int (*control_tx)(struct qtnf_bus *, struct sk_buff *);
42 
43 	/* data xfer methods */
44 	int (*data_tx)(struct qtnf_bus *bus, struct sk_buff *skb,
45 		       unsigned int macid, unsigned int vifid);
46 	void (*data_tx_timeout)(struct qtnf_bus *, struct net_device *);
47 	void (*data_tx_use_meta_set)(struct qtnf_bus *bus, bool use_meta);
48 	void (*data_rx_start)(struct qtnf_bus *);
49 	void (*data_rx_stop)(struct qtnf_bus *);
50 };
51 
52 struct qtnf_bus {
53 	struct device *dev;
54 	enum qtnf_fw_state fw_state;
55 	u32 chip;
56 	u32 chiprev;
57 	struct qtnf_bus_ops *bus_ops;
58 	struct qtnf_wmac *mac[QTNF_MAX_MAC];
59 	struct qtnf_qlink_transport trans;
60 	struct qtnf_hw_info hw_info;
61 	struct napi_struct mux_napi;
62 	struct net_device mux_dev;
63 	struct workqueue_struct *workqueue;
64 	struct workqueue_struct *hprio_workqueue;
65 	struct work_struct fw_work;
66 	struct work_struct event_work;
67 	struct mutex bus_lock; /* lock during command/event processing */
68 	struct dentry *dbg_dir;
69 	struct notifier_block netdev_nb;
70 	u8 hw_id[ETH_ALEN];
71 	/* bus private data */
72 	char bus_priv[] __aligned(sizeof(void *));
73 };
74 
qtnf_fw_is_up(struct qtnf_bus * bus)75 static inline bool qtnf_fw_is_up(struct qtnf_bus *bus)
76 {
77 	enum qtnf_fw_state state = bus->fw_state;
78 
79 	return ((state == QTNF_FW_STATE_ACTIVE) ||
80 		(state == QTNF_FW_STATE_RUNNING));
81 }
82 
qtnf_fw_is_attached(struct qtnf_bus * bus)83 static inline bool qtnf_fw_is_attached(struct qtnf_bus *bus)
84 {
85 	enum qtnf_fw_state state = bus->fw_state;
86 
87 	return ((state == QTNF_FW_STATE_ACTIVE) ||
88 		(state == QTNF_FW_STATE_RUNNING) ||
89 		(state == QTNF_FW_STATE_DEAD));
90 }
91 
get_bus_priv(struct qtnf_bus * bus)92 static inline void *get_bus_priv(struct qtnf_bus *bus)
93 {
94 	if (WARN(!bus, "qtnfmac: invalid bus pointer"))
95 		return NULL;
96 
97 	return &bus->bus_priv;
98 }
99 
100 /* callback wrappers */
101 
qtnf_bus_preinit(struct qtnf_bus * bus)102 static inline int qtnf_bus_preinit(struct qtnf_bus *bus)
103 {
104 	if (!bus->bus_ops->preinit)
105 		return 0;
106 	return bus->bus_ops->preinit(bus);
107 }
108 
qtnf_bus_stop(struct qtnf_bus * bus)109 static inline void qtnf_bus_stop(struct qtnf_bus *bus)
110 {
111 	if (!bus->bus_ops->stop)
112 		return;
113 	bus->bus_ops->stop(bus);
114 }
115 
qtnf_bus_data_tx(struct qtnf_bus * bus,struct sk_buff * skb,unsigned int macid,unsigned int vifid)116 static inline int qtnf_bus_data_tx(struct qtnf_bus *bus, struct sk_buff *skb,
117 				   unsigned int macid, unsigned int vifid)
118 {
119 	return bus->bus_ops->data_tx(bus, skb, macid, vifid);
120 }
121 
122 static inline void
qtnf_bus_data_tx_timeout(struct qtnf_bus * bus,struct net_device * ndev)123 qtnf_bus_data_tx_timeout(struct qtnf_bus *bus, struct net_device *ndev)
124 {
125 	return bus->bus_ops->data_tx_timeout(bus, ndev);
126 }
127 
qtnf_bus_control_tx(struct qtnf_bus * bus,struct sk_buff * skb)128 static inline int qtnf_bus_control_tx(struct qtnf_bus *bus, struct sk_buff *skb)
129 {
130 	return bus->bus_ops->control_tx(bus, skb);
131 }
132 
qtnf_bus_data_rx_start(struct qtnf_bus * bus)133 static inline void qtnf_bus_data_rx_start(struct qtnf_bus *bus)
134 {
135 	return bus->bus_ops->data_rx_start(bus);
136 }
137 
qtnf_bus_data_rx_stop(struct qtnf_bus * bus)138 static inline void qtnf_bus_data_rx_stop(struct qtnf_bus *bus)
139 {
140 	return bus->bus_ops->data_rx_stop(bus);
141 }
142 
qtnf_bus_lock(struct qtnf_bus * bus)143 static __always_inline void qtnf_bus_lock(struct qtnf_bus *bus)
144 {
145 	mutex_lock(&bus->bus_lock);
146 }
147 
qtnf_bus_unlock(struct qtnf_bus * bus)148 static __always_inline void qtnf_bus_unlock(struct qtnf_bus *bus)
149 {
150 	mutex_unlock(&bus->bus_lock);
151 }
152 
153 /* interface functions from common layer */
154 
155 int qtnf_core_attach(struct qtnf_bus *bus);
156 void qtnf_core_detach(struct qtnf_bus *bus);
157 
158 #endif /* QTNFMAC_BUS_H */
159