summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/qlogic/qed/qed_ll2.h
blob: 500d0c4f80771676f77725dbb1cf48c9cec901e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 * Copyright (c) 2019-2020 Marvell International Ltd.
 */

#ifndef _QED_LL2_H
#define _QED_LL2_H

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/qed/qed_chain.h>
#include <linux/qed/qed_ll2_if.h>
#include "qed.h"
#include "qed_hsi.h"
#include "qed_sp.h"

#define QED_MAX_NUM_OF_LL2_CONNECTIONS                    (4)
/* LL2 queues handles will be split as follows:
 * first will be legacy queues, and then the ctx based queues.
 */
#define QED_MAX_NUM_OF_LL2_CONNS_PF            (4)
#define QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF   (3)

#define QED_MAX_NUM_OF_CTX_LL2_CONNS_PF	\
	(QED_MAX_NUM_OF_LL2_CONNS_PF - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF)

#define QED_LL2_LEGACY_CONN_BASE_PF     0
#define QED_LL2_CTX_CONN_BASE_PF        QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF


struct qed_ll2_rx_packet {
	struct list_head list_entry;
	struct core_rx_bd_with_buff_len *rxq_bd;
	dma_addr_t rx_buf_addr;
	u16 buf_length;
	void *cookie;
	u8 placement_offset;
	u16 parse_flags;
	u16 packet_length;
	u16 vlan;
	u32 opaque_data[2];
};

struct qed_ll2_tx_packet {
	struct list_head list_entry;
	u16 bd_used;
	bool notify_fw;
	void *cookie;
	/* Flexible Array of bds_set determined by max_bds_per_packet */
	struct {
		struct core_tx_bd *txq_bd;
		dma_addr_t tx_frag;
		u16 frag_len;
	} bds_set[1];
};

struct qed_ll2_rx_queue {
	/* Lock protecting the Rx queue manipulation */
	spinlock_t lock;
	struct qed_chain rxq_chain;
	struct qed_chain rcq_chain;
	u8 rx_sb_index;
	u8 ctx_based;
	bool b_cb_registered;
	__le16 *p_fw_cons;
	struct list_head active_descq;
	struct list_head free_descq;
	struct list_head posting_descq;
	struct qed_ll2_rx_packet *descq_array;
	void __iomem *set_prod_addr;
	struct core_pwm_prod_update_data db_data;
};

struct qed_ll2_tx_queue {
	/* Lock protecting the Tx queue manipulation */
	spinlock_t lock;
	struct qed_chain txq_chain;
	u8 tx_sb_index;
	bool b_cb_registered;
	__le16 *p_fw_cons;
	struct list_head active_descq;
	struct list_head free_descq;
	struct list_head sending_descq;
	void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/
	struct qed_ll2_tx_packet *cur_send_packet;
	struct qed_ll2_tx_packet cur_completing_packet;
	u16 cur_completing_bd_idx;
	void __iomem *doorbell_addr;
	struct core_db_data db_msg;
	u16 bds_idx;
	u16 cur_send_frag_num;
	u16 cur_completing_frag_num;
	bool b_completing_packet;
};

struct qed_ll2_info {
	/* Lock protecting the state of LL2 */
	struct mutex mutex;

	struct qed_ll2_acquire_data_inputs input;
	u32 cid;
	u8 my_id;
	u8 queue_id;
	u8 tx_stats_id;
	bool b_active;
	enum core_tx_dest tx_dest;
	u8 tx_stats_en;
	bool main_func_queue;
	struct qed_ll2_rx_queue rx_queue;
	struct qed_ll2_tx_queue tx_queue;
	struct qed_ll2_cbs cbs;
};

extern const struct qed_ll2_ops qed_ll2_ops_pass;

/**
 * @brief qed_ll2_acquire_connection - allocate resources,
 *        starts rx & tx (if relevant) queues pair. Provides
 *        connecion handler as output parameter.
 *
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param data - describes connection parameters
 * @return int
 */
int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);

/**
 * @brief qed_ll2_establish_connection - start previously
 *        allocated LL2 queues pair
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param p_ptt
 * @param connection_handle	LL2 connection's handle obtained from
 *                              qed_ll2_require_connection
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_establish_connection(void *cxt, u8 connection_handle);

/**
 * @brief qed_ll2_post_rx_buffers - submit buffers to LL2 Rx queue.
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle	LL2 connection's handle obtained from
 *				qed_ll2_require_connection
 * @param addr			rx (physical address) buffers to submit
 * @param cookie
 * @param notify_fw		produce corresponding Rx BD immediately
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_post_rx_buffer(void *cxt,
			   u8 connection_handle,
			   dma_addr_t addr,
			   u16 buf_len, void *cookie, u8 notify_fw);

/**
 * @brief qed_ll2_prepare_tx_packet - request for start Tx BD
 *				      to prepare Tx packet submission to FW.
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle
 * @param pkt - info regarding the tx packet
 * @param notify_fw - issue doorbell to fw for this packet
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_prepare_tx_packet(void *cxt,
			      u8 connection_handle,
			      struct qed_ll2_tx_pkt_info *pkt,
			      bool notify_fw);

/**
 * @brief qed_ll2_release_connection -	releases resources
 *					allocated for LL2 connection
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle		LL2 connection's handle obtained from
 *					qed_ll2_require_connection
 */
void qed_ll2_release_connection(void *cxt, u8 connection_handle);

/**
 * @brief qed_ll2_set_fragment_of_tx_packet -	provides fragments to fill
 *						Tx BD of BDs requested by
 *						qed_ll2_prepare_tx_packet
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle			LL2 connection's handle
 *						obtained from
 *						qed_ll2_require_connection
 * @param addr
 * @param nbytes
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_set_fragment_of_tx_packet(void *cxt,
				      u8 connection_handle,
				      dma_addr_t addr, u16 nbytes);

/**
 * @brief qed_ll2_terminate_connection -	stops Tx/Rx queues
 *
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle			LL2 connection's handle
 *						obtained from
 *						qed_ll2_require_connection
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_terminate_connection(void *cxt, u8 connection_handle);

/**
 * @brief qed_ll2_get_stats -	get LL2 queue's statistics
 *
 *
 * @param cxt - pointer to the hw-function [opaque to some]
 * @param connection_handle	LL2 connection's handle obtained from
 *				qed_ll2_require_connection
 * @param p_stats
 *
 * @return 0 on success, failure otherwise
 */
int qed_ll2_get_stats(void *cxt,
		      u8 connection_handle, struct qed_ll2_stats *p_stats);

/**
 * @brief qed_ll2_alloc - Allocates LL2 connections set
 *
 * @param p_hwfn
 *
 * @return int
 */
int qed_ll2_alloc(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_ll2_setup - Inits LL2 connections set
 *
 * @param p_hwfn
 *
 */
void qed_ll2_setup(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_ll2_free - Releases LL2 connections set
 *
 * @param p_hwfn
 *
 */
void qed_ll2_free(struct qed_hwfn *p_hwfn);

#endif