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[linux.git] / drivers / infiniband / hw / hfi1 / mad.h
1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
2 /*
3  * Copyright(c) 2015 - 2017 Intel Corporation.
4  */
5
6 #ifndef _HFI1_MAD_H
7 #define _HFI1_MAD_H
8
9 #include <rdma/ib_pma.h>
10 #include <rdma/opa_smi.h>
11 #include <rdma/opa_port_info.h>
12 #include "opa_compat.h"
13
14 /*
15  * OPA Traps
16  */
17 #define OPA_TRAP_GID_NOW_IN_SERVICE             cpu_to_be16(64)
18 #define OPA_TRAP_GID_OUT_OF_SERVICE             cpu_to_be16(65)
19 #define OPA_TRAP_ADD_MULTICAST_GROUP            cpu_to_be16(66)
20 #define OPA_TRAL_DEL_MULTICAST_GROUP            cpu_to_be16(67)
21 #define OPA_TRAP_UNPATH                         cpu_to_be16(68)
22 #define OPA_TRAP_REPATH                         cpu_to_be16(69)
23 #define OPA_TRAP_PORT_CHANGE_STATE              cpu_to_be16(128)
24 #define OPA_TRAP_LINK_INTEGRITY                 cpu_to_be16(129)
25 #define OPA_TRAP_EXCESSIVE_BUFFER_OVERRUN       cpu_to_be16(130)
26 #define OPA_TRAP_FLOW_WATCHDOG                  cpu_to_be16(131)
27 #define OPA_TRAP_CHANGE_CAPABILITY              cpu_to_be16(144)
28 #define OPA_TRAP_CHANGE_SYSGUID                 cpu_to_be16(145)
29 #define OPA_TRAP_BAD_M_KEY                      cpu_to_be16(256)
30 #define OPA_TRAP_BAD_P_KEY                      cpu_to_be16(257)
31 #define OPA_TRAP_BAD_Q_KEY                      cpu_to_be16(258)
32 #define OPA_TRAP_SWITCH_BAD_PKEY                cpu_to_be16(259)
33 #define OPA_SMA_TRAP_DATA_LINK_WIDTH            cpu_to_be16(2048)
34
35 /*
36  * Generic trap/notice other local changes flags (trap 144).
37  */
38 #define OPA_NOTICE_TRAP_LWDE_CHG        0x08 /* Link Width Downgrade Enable
39                                               * changed
40                                               */
41 #define OPA_NOTICE_TRAP_LSE_CHG         0x04 /* Link Speed Enable changed */
42 #define OPA_NOTICE_TRAP_LWE_CHG         0x02 /* Link Width Enable changed */
43 #define OPA_NOTICE_TRAP_NODE_DESC_CHG   0x01
44
45 struct opa_mad_notice_attr {
46         u8 generic_type;
47         u8 prod_type_msb;
48         __be16 prod_type_lsb;
49         __be16 trap_num;
50         __be16 toggle_count;
51         __be32 issuer_lid;
52         __be32 reserved1;
53         union ib_gid issuer_gid;
54
55         union {
56                 struct {
57                         u8      details[64];
58                 } raw_data;
59
60                 struct {
61                         union ib_gid    gid;
62                 } __packed ntc_64_65_66_67;
63
64                 struct {
65                         __be32  lid;
66                 } __packed ntc_128;
67
68                 struct {
69                         __be32  lid;            /* where violation happened */
70                         u8      port_num;       /* where violation happened */
71                 } __packed ntc_129_130_131;
72
73                 struct {
74                         __be32  lid;            /* LID where change occurred */
75                         __be32  new_cap_mask;   /* new capability mask */
76                         __be16  reserved2;
77                         __be16  cap_mask3;
78                         __be16  change_flags;   /* low 4 bits only */
79                 } __packed ntc_144;
80
81                 struct {
82                         __be64  new_sys_guid;
83                         __be32  lid;            /* lid where sys guid changed */
84                 } __packed ntc_145;
85
86                 struct {
87                         __be32  lid;
88                         __be32  dr_slid;
89                         u8      method;
90                         u8      dr_trunc_hop;
91                         __be16  attr_id;
92                         __be32  attr_mod;
93                         __be64  mkey;
94                         u8      dr_rtn_path[30];
95                 } __packed ntc_256;
96
97                 struct {
98                         __be32          lid1;
99                         __be32          lid2;
100                         __be32          key;
101                         u8              sl;     /* SL: high 5 bits */
102                         u8              reserved3[3];
103                         union ib_gid    gid1;
104                         union ib_gid    gid2;
105                         __be32          qp1;    /* high 8 bits reserved */
106                         __be32          qp2;    /* high 8 bits reserved */
107                 } __packed ntc_257_258;
108
109                 struct {
110                         __be16          flags;  /* low 8 bits reserved */
111                         __be16          pkey;
112                         __be32          lid1;
113                         __be32          lid2;
114                         u8              sl;     /* SL: high 5 bits */
115                         u8              reserved4[3];
116                         union ib_gid    gid1;
117                         union ib_gid    gid2;
118                         __be32          qp1;    /* high 8 bits reserved */
119                         __be32          qp2;    /* high 8 bits reserved */
120                 } __packed ntc_259;
121
122                 struct {
123                         __be32  lid;
124                 } __packed ntc_2048;
125
126         };
127         u8      class_data[];
128 };
129
130 #define IB_VLARB_LOWPRI_0_31    1
131 #define IB_VLARB_LOWPRI_32_63   2
132 #define IB_VLARB_HIGHPRI_0_31   3
133 #define IB_VLARB_HIGHPRI_32_63  4
134
135 #define OPA_MAX_PREEMPT_CAP         32
136 #define OPA_VLARB_LOW_ELEMENTS       0
137 #define OPA_VLARB_HIGH_ELEMENTS      1
138 #define OPA_VLARB_PREEMPT_ELEMENTS   2
139 #define OPA_VLARB_PREEMPT_MATRIX     3
140
141 #define IB_PMA_PORT_COUNTERS_CONG       cpu_to_be16(0xFF00)
142 #define LINK_SPEED_25G          1
143 #define LINK_SPEED_12_5G        2
144 #define LINK_WIDTH_DEFAULT      4
145 #define DECIMAL_FACTORING       1000
146 /*
147  * The default link width is multiplied by 1000
148  * to get accurate value after division.
149  */
150 #define FACTOR_LINK_WIDTH       (LINK_WIDTH_DEFAULT * DECIMAL_FACTORING)
151
152 struct ib_pma_portcounters_cong {
153         u8 reserved;
154         u8 reserved1;
155         __be16 port_check_rate;
156         __be16 symbol_error_counter;
157         u8 link_error_recovery_counter;
158         u8 link_downed_counter;
159         __be16 port_rcv_errors;
160         __be16 port_rcv_remphys_errors;
161         __be16 port_rcv_switch_relay_errors;
162         __be16 port_xmit_discards;
163         u8 port_xmit_constraint_errors;
164         u8 port_rcv_constraint_errors;
165         u8 reserved2;
166         u8 link_overrun_errors; /* LocalLink: 7:4, BufferOverrun: 3:0 */
167         __be16 reserved3;
168         __be16 vl15_dropped;
169         __be64 port_xmit_data;
170         __be64 port_rcv_data;
171         __be64 port_xmit_packets;
172         __be64 port_rcv_packets;
173         __be64 port_xmit_wait;
174         __be64 port_adr_events;
175 } __packed;
176
177 #define IB_SMP_UNSUP_VERSION    cpu_to_be16(0x0004)
178 #define IB_SMP_UNSUP_METHOD     cpu_to_be16(0x0008)
179 #define IB_SMP_UNSUP_METH_ATTR  cpu_to_be16(0x000C)
180 #define IB_SMP_INVALID_FIELD    cpu_to_be16(0x001C)
181
182 #define OPA_MAX_PREEMPT_CAP         32
183 #define OPA_VLARB_LOW_ELEMENTS       0
184 #define OPA_VLARB_HIGH_ELEMENTS      1
185 #define OPA_VLARB_PREEMPT_ELEMENTS   2
186 #define OPA_VLARB_PREEMPT_MATRIX     3
187
188 #define HFI1_XMIT_RATE_UNSUPPORTED               0x0
189 #define HFI1_XMIT_RATE_PICO                      0x7
190 /* number of 4nsec cycles equaling 2secs */
191 #define HFI1_CONG_TIMER_PSINTERVAL               0x1DCD64EC
192
193 #define IB_CC_SVCTYPE_RC 0x0
194 #define IB_CC_SVCTYPE_UC 0x1
195 #define IB_CC_SVCTYPE_RD 0x2
196 #define IB_CC_SVCTYPE_UD 0x3
197
198 /*
199  * There should be an equivalent IB #define for the following, but
200  * I cannot find it.
201  */
202 #define OPA_CC_LOG_TYPE_HFI     2
203
204 struct opa_hfi1_cong_log_event_internal {
205         u32 lqpn;
206         u32 rqpn;
207         u8 sl;
208         u8 svc_type;
209         u32 rlid;
210         u64 timestamp; /* wider than 32 bits to detect 32 bit rollover */
211 };
212
213 struct opa_hfi1_cong_log_event {
214         u8 local_qp_cn_entry[3];
215         u8 remote_qp_number_cn_entry[3];
216         u8 sl_svc_type_cn_entry; /* 5 bits SL, 3 bits svc type */
217         u8 reserved;
218         __be32 remote_lid_cn_entry;
219         __be32 timestamp_cn_entry;
220 } __packed;
221
222 #define OPA_CONG_LOG_ELEMS      96
223
224 struct opa_hfi1_cong_log {
225         u8 log_type;
226         u8 congestion_flags;
227         __be16 threshold_event_counter;
228         __be32 current_time_stamp;
229         u8 threshold_cong_event_map[OPA_MAX_SLS / 8];
230         struct opa_hfi1_cong_log_event events[OPA_CONG_LOG_ELEMS];
231 } __packed;
232
233 #define IB_CC_TABLE_CAP_DEFAULT 31
234
235 /* Port control flags */
236 #define IB_CC_CCS_PC_SL_BASED 0x01
237
238 struct opa_congestion_setting_entry {
239         u8 ccti_increase;
240         u8 reserved;
241         __be16 ccti_timer;
242         u8 trigger_threshold;
243         u8 ccti_min; /* min CCTI for cc table */
244 } __packed;
245
246 struct opa_congestion_setting_entry_shadow {
247         u8 ccti_increase;
248         u8 reserved;
249         u16 ccti_timer;
250         u8 trigger_threshold;
251         u8 ccti_min; /* min CCTI for cc table */
252 } __packed;
253
254 struct opa_congestion_setting_attr {
255         __be32 control_map;
256         __be16 port_control;
257         struct opa_congestion_setting_entry entries[OPA_MAX_SLS];
258 } __packed;
259
260 struct opa_congestion_setting_attr_shadow {
261         u32 control_map;
262         u16 port_control;
263         struct opa_congestion_setting_entry_shadow entries[OPA_MAX_SLS];
264 } __packed;
265
266 #define IB_CC_TABLE_ENTRY_INCREASE_DEFAULT 1
267 #define IB_CC_TABLE_ENTRY_TIMER_DEFAULT 1
268
269 /* 64 Congestion Control table entries in a single MAD */
270 #define IB_CCT_ENTRIES 64
271 #define IB_CCT_MIN_ENTRIES (IB_CCT_ENTRIES * 2)
272
273 struct ib_cc_table_entry {
274         __be16 entry; /* shift:2, multiplier:14 */
275 };
276
277 struct ib_cc_table_entry_shadow {
278         u16 entry; /* shift:2, multiplier:14 */
279 };
280
281 struct ib_cc_table_attr {
282         __be16 ccti_limit; /* max CCTI for cc table */
283         struct ib_cc_table_entry ccti_entries[IB_CCT_ENTRIES];
284 } __packed;
285
286 struct ib_cc_table_attr_shadow {
287         u16 ccti_limit; /* max CCTI for cc table */
288         struct ib_cc_table_entry_shadow ccti_entries[IB_CCT_ENTRIES];
289 } __packed;
290
291 #define CC_TABLE_SHADOW_MAX \
292         (IB_CC_TABLE_CAP_DEFAULT * IB_CCT_ENTRIES)
293
294 struct cc_table_shadow {
295         u16 ccti_limit; /* max CCTI for cc table */
296         struct ib_cc_table_entry_shadow entries[CC_TABLE_SHADOW_MAX];
297 } __packed;
298
299 /*
300  * struct cc_state combines the (active) per-port congestion control
301  * table, and the (active) per-SL congestion settings. cc_state data
302  * may need to be read in code paths that we want to be fast, so it
303  * is an RCU protected structure.
304  */
305 struct cc_state {
306         struct rcu_head rcu;
307         struct cc_table_shadow cct;
308         struct opa_congestion_setting_attr_shadow cong_setting;
309 };
310
311 /*
312  * OPA BufferControl MAD
313  */
314
315 /* attribute modifier macros */
316 #define OPA_AM_NPORT_SHIFT      24
317 #define OPA_AM_NPORT_MASK       0xff
318 #define OPA_AM_NPORT_SMASK      (OPA_AM_NPORT_MASK << OPA_AM_NPORT_SHIFT)
319 #define OPA_AM_NPORT(am)        (((am) >> OPA_AM_NPORT_SHIFT) & \
320                                         OPA_AM_NPORT_MASK)
321
322 #define OPA_AM_NBLK_SHIFT       24
323 #define OPA_AM_NBLK_MASK        0xff
324 #define OPA_AM_NBLK_SMASK       (OPA_AM_NBLK_MASK << OPA_AM_NBLK_SHIFT)
325 #define OPA_AM_NBLK(am)         (((am) >> OPA_AM_NBLK_SHIFT) & \
326                                         OPA_AM_NBLK_MASK)
327
328 #define OPA_AM_START_BLK_SHIFT  0
329 #define OPA_AM_START_BLK_MASK   0xff
330 #define OPA_AM_START_BLK_SMASK  (OPA_AM_START_BLK_MASK << \
331                                         OPA_AM_START_BLK_SHIFT)
332 #define OPA_AM_START_BLK(am)    (((am) >> OPA_AM_START_BLK_SHIFT) & \
333                                         OPA_AM_START_BLK_MASK)
334
335 #define OPA_AM_PORTNUM_SHIFT    0
336 #define OPA_AM_PORTNUM_MASK     0xff
337 #define OPA_AM_PORTNUM_SMASK    (OPA_AM_PORTNUM_MASK << OPA_AM_PORTNUM_SHIFT)
338 #define OPA_AM_PORTNUM(am)      (((am) >> OPA_AM_PORTNUM_SHIFT) & \
339                                         OPA_AM_PORTNUM_MASK)
340
341 #define OPA_AM_ASYNC_SHIFT      12
342 #define OPA_AM_ASYNC_MASK       0x1
343 #define OPA_AM_ASYNC_SMASK      (OPA_AM_ASYNC_MASK << OPA_AM_ASYNC_SHIFT)
344 #define OPA_AM_ASYNC(am)        (((am) >> OPA_AM_ASYNC_SHIFT) & \
345                                         OPA_AM_ASYNC_MASK)
346
347 #define OPA_AM_START_SM_CFG_SHIFT       9
348 #define OPA_AM_START_SM_CFG_MASK        0x1
349 #define OPA_AM_START_SM_CFG_SMASK       (OPA_AM_START_SM_CFG_MASK << \
350                                                 OPA_AM_START_SM_CFG_SHIFT)
351 #define OPA_AM_START_SM_CFG(am)         (((am) >> OPA_AM_START_SM_CFG_SHIFT) \
352                                                 & OPA_AM_START_SM_CFG_MASK)
353
354 #define OPA_AM_CI_ADDR_SHIFT    19
355 #define OPA_AM_CI_ADDR_MASK     0xfff
356 #define OPA_AM_CI_ADDR_SMASK    (OPA_AM_CI_ADDR_MASK << OPA_CI_ADDR_SHIFT)
357 #define OPA_AM_CI_ADDR(am)      (((am) >> OPA_AM_CI_ADDR_SHIFT) & \
358                                         OPA_AM_CI_ADDR_MASK)
359
360 #define OPA_AM_CI_LEN_SHIFT     13
361 #define OPA_AM_CI_LEN_MASK      0x3f
362 #define OPA_AM_CI_LEN_SMASK     (OPA_AM_CI_LEN_MASK << OPA_CI_LEN_SHIFT)
363 #define OPA_AM_CI_LEN(am)       (((am) >> OPA_AM_CI_LEN_SHIFT) & \
364                                         OPA_AM_CI_LEN_MASK)
365
366 /* error info macros */
367 #define OPA_EI_STATUS_SMASK     0x80
368 #define OPA_EI_CODE_SMASK       0x0f
369
370 struct vl_limit {
371         __be16 dedicated;
372         __be16 shared;
373 };
374
375 struct buffer_control {
376         __be16 reserved;
377         __be16 overall_shared_limit;
378         struct vl_limit vl[OPA_MAX_VLS];
379 };
380
381 struct sc2vlnt {
382         u8 vlnt[32]; /* 5 bit VL, 3 bits reserved */
383 };
384
385 /*
386  * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
387  * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
388  * We support 5 counters which only count the mandatory quantities.
389  */
390 #define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
391 #define COUNTER_MASK0_9 \
392         cpu_to_be32(COUNTER_MASK(1, 0) | \
393                     COUNTER_MASK(1, 1) | \
394                     COUNTER_MASK(1, 2) | \
395                     COUNTER_MASK(1, 3) | \
396                     COUNTER_MASK(1, 4))
397
398 void hfi1_event_pkey_change(struct hfi1_devdata *dd, u32 port);
399 void hfi1_handle_trap_timer(struct timer_list *t);
400 u16 tx_link_width(u16 link_width);
401 u64 get_xmit_wait_counters(struct hfi1_pportdata *ppd, u16 link_width,
402                            u16 link_speed, int vl);
403 /**
404  * get_link_speed - determine whether 12.5G or 25G speed
405  * @link_speed: the speed of active link
406  * @return: Return 2 if link speed identified as 12.5G
407  * or return 1 if link speed is 25G.
408  *
409  * The function indirectly calculate required link speed
410  * value for convert_xmit_counter function. If the link
411  * speed is 25G, the function return as 1 as it is required
412  * by xmit counter conversion formula :-( 25G / link_speed).
413  * This conversion will provide value 1 if current
414  * link speed is 25G or 2 if 12.5G.This is done to avoid
415  * 12.5 float number conversion.
416  */
417 static inline u16 get_link_speed(u16 link_speed)
418 {
419         return (link_speed == 1) ?
420                  LINK_SPEED_12_5G : LINK_SPEED_25G;
421 }
422
423 /**
424  * convert_xmit_counter - calculate flit times for given xmit counter
425  * value
426  * @xmit_wait_val: current xmit counter value
427  * @link_width: width of active link
428  * @link_speed: speed of active link
429  * @return: return xmit counter value in flit times.
430  */
431 static inline u64 convert_xmit_counter(u64 xmit_wait_val, u16 link_width,
432                                        u16 link_speed)
433 {
434         return (xmit_wait_val * 2 * (FACTOR_LINK_WIDTH / link_width)
435                  * link_speed) / DECIMAL_FACTORING;
436 }
437 #endif                          /* _HFI1_MAD_H */
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