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1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2/* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
5 */
6
7#ifndef _QED_LL2_H
8#define _QED_LL2_H
9
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/list.h>
13#include <linux/mutex.h>
14#include <linux/slab.h>
15#include <linux/spinlock.h>
16#include <linux/qed/qed_chain.h>
17#include <linux/qed/qed_ll2_if.h>
18#include "qed.h"
19#include "qed_hsi.h"
20#include "qed_sp.h"
21
22#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4)
23/* LL2 queues handles will be split as follows:
24 * first will be legacy queues, and then the ctx based queues.
25 */
26#define QED_MAX_NUM_OF_LL2_CONNS_PF (4)
27#define QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF (3)
28
29#define QED_MAX_NUM_OF_CTX_LL2_CONNS_PF \
30 (QED_MAX_NUM_OF_LL2_CONNS_PF - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF)
31
32#define QED_LL2_LEGACY_CONN_BASE_PF 0
33#define QED_LL2_CTX_CONN_BASE_PF QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF
34
35struct qed_ll2_rx_packet {
36 struct list_head list_entry;
37 struct core_rx_bd_with_buff_len *rxq_bd;
38 dma_addr_t rx_buf_addr;
39 u16 buf_length;
40 void *cookie;
41 u8 placement_offset;
42 u16 parse_flags;
43 u16 packet_length;
44 u16 vlan;
45 u32 opaque_data[2];
46};
47
48struct qed_ll2_tx_packet {
49 struct list_head list_entry;
50 u16 bd_used;
51 bool notify_fw;
52 void *cookie;
53 /* Flexible Array of bds_set determined by max_bds_per_packet */
54 struct {
55 struct core_tx_bd *txq_bd;
56 dma_addr_t tx_frag;
57 u16 frag_len;
58 } bds_set[];
59};
60
61struct qed_ll2_rx_queue {
62 /* Lock protecting the Rx queue manipulation */
63 spinlock_t lock;
64 struct qed_chain rxq_chain;
65 struct qed_chain rcq_chain;
66 u8 rx_sb_index;
67 u8 ctx_based;
68 bool b_cb_registered;
69 __le16 *p_fw_cons;
70 struct list_head active_descq;
71 struct list_head free_descq;
72 struct list_head posting_descq;
73 struct qed_ll2_rx_packet *descq_array;
74 void __iomem *set_prod_addr;
75 struct core_pwm_prod_update_data db_data;
76};
77
78struct qed_ll2_tx_queue {
79 /* Lock protecting the Tx queue manipulation */
80 spinlock_t lock;
81 struct qed_chain txq_chain;
82 u8 tx_sb_index;
83 bool b_cb_registered;
84 __le16 *p_fw_cons;
85 struct list_head active_descq;
86 struct list_head free_descq;
87 struct list_head sending_descq;
88 u16 cur_completing_bd_idx;
89 void __iomem *doorbell_addr;
90 struct core_db_data db_msg;
91 u16 bds_idx;
92 u16 cur_send_frag_num;
93 u16 cur_completing_frag_num;
94 bool b_completing_packet;
95 void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/
96 struct qed_ll2_tx_packet *cur_send_packet;
97 struct qed_ll2_tx_packet cur_completing_packet;
98};
99
100struct qed_ll2_info {
101 /* Lock protecting the state of LL2 */
102 struct mutex mutex;
103
104 struct qed_ll2_acquire_data_inputs input;
105 u32 cid;
106 u8 my_id;
107 u8 queue_id;
108 u8 tx_stats_id;
109 bool b_active;
110 enum core_tx_dest tx_dest;
111 u8 tx_stats_en;
112 bool main_func_queue;
113 struct qed_ll2_cbs cbs;
114 struct qed_ll2_rx_queue rx_queue;
115 struct qed_ll2_tx_queue tx_queue;
116};
117
118extern const struct qed_ll2_ops qed_ll2_ops_pass;
119
120/**
121 * qed_ll2_acquire_connection(): Allocate resources,
122 * starts rx & tx (if relevant) queues pair.
123 * Provides connecion handler as output
124 * parameter.
125 *
126 * @cxt: Pointer to the hw-function [opaque to some].
127 * @data: Describes connection parameters.
128 *
129 * Return: Int.
130 */
131int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data);
132
133/**
134 * qed_ll2_establish_connection(): start previously allocated LL2 queues pair
135 *
136 * @cxt: Pointer to the hw-function [opaque to some].
137 * @connection_handle: LL2 connection's handle obtained from
138 * qed_ll2_require_connection.
139 *
140 * Return: 0 on success, failure otherwise.
141 */
142int qed_ll2_establish_connection(void *cxt, u8 connection_handle);
143
144/**
145 * qed_ll2_post_rx_buffer(): Submit buffers to LL2 Rx queue.
146 *
147 * @cxt: Pointer to the hw-function [opaque to some].
148 * @connection_handle: LL2 connection's handle obtained from
149 * qed_ll2_require_connection.
150 * @addr: RX (physical address) buffers to submit.
151 * @buf_len: Buffer Len.
152 * @cookie: Cookie.
153 * @notify_fw: Produce corresponding Rx BD immediately.
154 *
155 * Return: 0 on success, failure otherwise.
156 */
157int qed_ll2_post_rx_buffer(void *cxt,
158 u8 connection_handle,
159 dma_addr_t addr,
160 u16 buf_len, void *cookie, u8 notify_fw);
161
162/**
163 * qed_ll2_prepare_tx_packet(): Request for start Tx BD
164 * to prepare Tx packet submission to FW.
165 *
166 * @cxt: Pointer to the hw-function [opaque to some].
167 * @connection_handle: Connection handle.
168 * @pkt: Info regarding the tx packet.
169 * @notify_fw: Issue doorbell to fw for this packet.
170 *
171 * Return: 0 on success, failure otherwise.
172 */
173int qed_ll2_prepare_tx_packet(void *cxt,
174 u8 connection_handle,
175 struct qed_ll2_tx_pkt_info *pkt,
176 bool notify_fw);
177
178/**
179 * qed_ll2_release_connection(): Releases resources allocated for LL2
180 * connection.
181 *
182 * @cxt: Pointer to the hw-function [opaque to some].
183 * @connection_handle: LL2 connection's handle obtained from
184 * qed_ll2_require_connection.
185 *
186 * Return: Void.
187 */
188void qed_ll2_release_connection(void *cxt, u8 connection_handle);
189
190/**
191 * qed_ll2_set_fragment_of_tx_packet(): Provides fragments to fill
192 * Tx BD of BDs requested by
193 * qed_ll2_prepare_tx_packet
194 *
195 * @cxt: Pointer to the hw-function [opaque to some].
196 * @connection_handle: LL2 connection's handle obtained from
197 * qed_ll2_require_connection.
198 * @addr: Address.
199 * @nbytes: Number of bytes.
200 *
201 * Return: 0 on success, failure otherwise.
202 */
203int qed_ll2_set_fragment_of_tx_packet(void *cxt,
204 u8 connection_handle,
205 dma_addr_t addr, u16 nbytes);
206
207/**
208 * qed_ll2_terminate_connection(): Stops Tx/Rx queues
209 *
210 * @cxt: Pointer to the hw-function [opaque to some].
211 * @connection_handle: LL2 connection's handle obtained from
212 * qed_ll2_require_connection.
213 *
214 * Return: 0 on success, failure otherwise.
215 */
216int qed_ll2_terminate_connection(void *cxt, u8 connection_handle);
217
218/**
219 * qed_ll2_get_stats(): Get LL2 queue's statistics
220 *
221 * @cxt: Pointer to the hw-function [opaque to some].
222 * @connection_handle: LL2 connection's handle obtained from
223 * qed_ll2_require_connection.
224 * @p_stats: Pointer Status.
225 *
226 * Return: 0 on success, failure otherwise.
227 */
228int qed_ll2_get_stats(void *cxt,
229 u8 connection_handle, struct qed_ll2_stats *p_stats);
230
231/**
232 * qed_ll2_alloc(): Allocates LL2 connections set.
233 *
234 * @p_hwfn: HW device data.
235 *
236 * Return: Int.
237 */
238int qed_ll2_alloc(struct qed_hwfn *p_hwfn);
239
240/**
241 * qed_ll2_setup(): Inits LL2 connections set.
242 *
243 * @p_hwfn: HW device data.
244 *
245 * Return: Void.
246 *
247 */
248void qed_ll2_setup(struct qed_hwfn *p_hwfn);
249
250/**
251 * qed_ll2_free(): Releases LL2 connections set
252 *
253 * @p_hwfn: HW device data.
254 *
255 * Return: Void.
256 *
257 */
258void qed_ll2_free(struct qed_hwfn *p_hwfn);
259
260#endif