1 /*
2  * Broadcom NetXtreme-E RoCE driver.
3  *
4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * BSD license below:
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  *
17  * 1. Redistributions of source code must retain the above copyright
18  *    notice, this list of conditions and the following disclaimer.
19  * 2. Redistributions in binary form must reproduce the above copyright
20  *    notice, this list of conditions and the following disclaimer in
21  *    the documentation and/or other materials provided with the
22  *    distribution.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35  *
36  * Description: Slow Path Operators (header)
37  *
38  */
39 
40 #ifndef __BNXT_RE_H__
41 #define __BNXT_RE_H__
42 #include <rdma/uverbs_ioctl.h>
43 #include "hw_counters.h"
44 #define ROCE_DRV_MODULE_NAME		"bnxt_re"
45 
46 #define BNXT_RE_DESC	"Broadcom NetXtreme-C/E RoCE Driver"
47 
48 #define BNXT_RE_PAGE_SHIFT_1G		(30)
49 #define BNXT_RE_PAGE_SIZE_SUPPORTED	0x7FFFF000 /* 4kb - 1G */
50 
51 #define BNXT_RE_MAX_MR_SIZE_LOW		BIT_ULL(BNXT_RE_PAGE_SHIFT_1G)
52 #define BNXT_RE_MAX_MR_SIZE_HIGH	BIT_ULL(39)
53 #define BNXT_RE_MAX_MR_SIZE		BNXT_RE_MAX_MR_SIZE_HIGH
54 
55 #define BNXT_RE_MAX_QPC_COUNT		(64 * 1024)
56 #define BNXT_RE_MAX_MRW_COUNT		(64 * 1024)
57 #define BNXT_RE_MAX_SRQC_COUNT		(64 * 1024)
58 #define BNXT_RE_MAX_CQ_COUNT		(64 * 1024)
59 #define BNXT_RE_MAX_MRW_COUNT_64K	(64 * 1024)
60 #define BNXT_RE_MAX_MRW_COUNT_256K	(256 * 1024)
61 
62 /* Number of MRs to reserve for PF, leaving remainder for VFs */
63 #define BNXT_RE_RESVD_MR_FOR_PF         (32 * 1024)
64 #define BNXT_RE_MAX_GID_PER_VF          128
65 
66 /*
67  * Percentage of resources of each type reserved for PF.
68  * Remaining resources are divided equally among VFs.
69  * [0, 100]
70  */
71 #define BNXT_RE_PCT_RSVD_FOR_PF         50
72 
73 #define BNXT_RE_UD_QP_HW_STALL		0x400000
74 
75 #define BNXT_RE_RQ_WQE_THRESHOLD	32
76 
77 /*
78  * Setting the default ack delay value to 16, which means
79  * the default timeout is approx. 260ms(4 usec * 2 ^(timeout))
80  */
81 
82 #define BNXT_RE_DEFAULT_ACK_DELAY	16
83 
84 struct bnxt_re_ring_attr {
85 	dma_addr_t	*dma_arr;
86 	int		pages;
87 	int		type;
88 	u32		depth;
89 	u32		lrid; /* Logical ring id */
90 	u8		mode;
91 };
92 
93 struct bnxt_re_sqp_entries {
94 	struct bnxt_qplib_sge sge;
95 	u64 wrid;
96 	/* For storing the actual qp1 cqe */
97 	struct bnxt_qplib_cqe cqe;
98 	struct bnxt_re_qp *qp1_qp;
99 };
100 
101 #define BNXT_RE_MAX_GSI_SQP_ENTRIES	1024
102 struct bnxt_re_gsi_context {
103 	struct	bnxt_re_qp *gsi_qp;
104 	struct	bnxt_re_qp *gsi_sqp;
105 	struct	bnxt_re_ah *gsi_sah;
106 	struct	bnxt_re_sqp_entries *sqp_tbl;
107 };
108 
109 #define BNXT_RE_MIN_MSIX		2
110 #define BNXT_RE_MAX_MSIX		9
111 #define BNXT_RE_AEQ_IDX			0
112 #define BNXT_RE_NQ_IDX			1
113 #define BNXT_RE_GEN_P5_MAX_VF		64
114 
115 struct bnxt_re_pacing {
116 	u64 dbr_db_fifo_reg_off;
117 	void *dbr_page;
118 	u64 dbr_bar_addr;
119 	u32 pacing_algo_th;
120 	u32 do_pacing_save;
121 	u32 dbq_pacing_time; /* ms */
122 	u32 dbr_def_do_pacing;
123 	bool dbr_pacing;
124 	struct mutex dbq_lock; /* synchronize db pacing algo */
125 };
126 
127 #define BNXT_RE_MAX_DBR_DO_PACING 0xFFFF
128 #define BNXT_RE_DBR_PACING_TIME 5 /* ms */
129 #define BNXT_RE_PACING_ALGO_THRESHOLD 250 /* Entries in DB FIFO */
130 #define BNXT_RE_PACING_ALARM_TH_MULTIPLE 2 /* Multiple of pacing algo threshold */
131 /* Default do_pacing value when there is no congestion */
132 #define BNXT_RE_DBR_DO_PACING_NO_CONGESTION 0x7F /* 1 in 512 probability */
133 #define BNXT_RE_DB_FIFO_ROOM_MASK 0x1FFF8000
134 #define BNXT_RE_MAX_FIFO_DEPTH 0x2c00
135 #define BNXT_RE_DB_FIFO_ROOM_SHIFT 15
136 #define BNXT_RE_GRC_FIFO_REG_BASE 0x2000
137 
138 struct bnxt_re_dev {
139 	struct ib_device		ibdev;
140 	struct list_head		list;
141 	unsigned long			flags;
142 #define BNXT_RE_FLAG_NETDEV_REGISTERED		0
143 #define BNXT_RE_FLAG_HAVE_L2_REF		3
144 #define BNXT_RE_FLAG_RCFW_CHANNEL_EN		4
145 #define BNXT_RE_FLAG_QOS_WORK_REG		5
146 #define BNXT_RE_FLAG_RESOURCES_ALLOCATED	7
147 #define BNXT_RE_FLAG_RESOURCES_INITIALIZED	8
148 #define BNXT_RE_FLAG_ERR_DEVICE_DETACHED       17
149 #define BNXT_RE_FLAG_ISSUE_ROCE_STATS          29
150 	struct net_device		*netdev;
151 	struct notifier_block		nb;
152 	unsigned int			version, major, minor;
153 	struct bnxt_qplib_chip_ctx	*chip_ctx;
154 	struct bnxt_en_dev		*en_dev;
155 	int				num_msix;
156 
157 	int				id;
158 
159 	struct delayed_work		worker;
160 	u8				cur_prio_map;
161 
162 	/* FP Notification Queue (CQ & SRQ) */
163 	struct tasklet_struct		nq_task;
164 
165 	/* RCFW Channel */
166 	struct bnxt_qplib_rcfw		rcfw;
167 
168 	/* NQ */
169 	struct bnxt_qplib_nq		nq[BNXT_RE_MAX_MSIX];
170 
171 	/* Device Resources */
172 	struct bnxt_qplib_dev_attr	dev_attr;
173 	struct bnxt_qplib_ctx		qplib_ctx;
174 	struct bnxt_qplib_res		qplib_res;
175 	struct bnxt_qplib_dpi		dpi_privileged;
176 
177 	struct mutex			qp_lock;	/* protect qp list */
178 	struct list_head		qp_list;
179 
180 	/* Max of 2 lossless traffic class supported per port */
181 	u16				cosq[2];
182 
183 	/* QP for handling QP1 packets */
184 	struct bnxt_re_gsi_context	gsi_ctx;
185 	struct bnxt_re_stats		stats;
186 	atomic_t nq_alloc_cnt;
187 	u32 is_virtfn;
188 	u32 num_vfs;
189 	struct bnxt_re_pacing pacing;
190 	struct work_struct dbq_fifo_check_work;
191 	struct delayed_work dbq_pacing_work;
192 };
193 
194 #define to_bnxt_re_dev(ptr, member)	\
195 	container_of((ptr), struct bnxt_re_dev, member)
196 
197 #define BNXT_RE_ROCE_V1_PACKET		0
198 #define BNXT_RE_ROCEV2_IPV4_PACKET	2
199 #define BNXT_RE_ROCEV2_IPV6_PACKET	3
200 
201 #define BNXT_RE_CHECK_RC(x) ((x) && ((x) != -ETIMEDOUT))
202 void bnxt_re_pacing_alert(struct bnxt_re_dev *rdev);
203 
204 static inline struct device *rdev_to_dev(struct bnxt_re_dev *rdev)
205 {
206 	if (rdev)
207 		return  &rdev->ibdev.dev;
208 	return NULL;
209 }
210 
211 extern const struct uapi_definition bnxt_re_uapi_defs[];
212 #endif
213