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fab97220 HS |
1 | /* |
2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER | |
3 | * | |
4 | * Functions for EQs, NEQs and interrupts | |
5 | * | |
6 | * Authors: Heiko J Schick <schickhj@de.ibm.com> | |
7 | * Khadija Souissi <souissi@de.ibm.com> | |
28db6beb JF |
8 | * Hoang-Nam Nguyen <hnguyen@de.ibm.com> |
9 | * Joachim Fenkes <fenkes@de.ibm.com> | |
fab97220 HS |
10 | * |
11 | * Copyright (c) 2005 IBM Corporation | |
12 | * | |
13 | * All rights reserved. | |
14 | * | |
15 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB | |
16 | * BSD. | |
17 | * | |
18 | * OpenIB BSD License | |
19 | * | |
20 | * Redistribution and use in source and binary forms, with or without | |
21 | * modification, are permitted provided that the following conditions are met: | |
22 | * | |
23 | * Redistributions of source code must retain the above copyright notice, this | |
24 | * list of conditions and the following disclaimer. | |
25 | * | |
26 | * Redistributions in binary form must reproduce the above copyright notice, | |
27 | * this list of conditions and the following disclaimer in the documentation | |
28 | * and/or other materials | |
29 | * provided with the distribution. | |
30 | * | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
32 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
33 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
34 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
35 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
36 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
37 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
38 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
39 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
40 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGE. | |
42 | */ | |
43 | ||
44 | #include "ehca_classes.h" | |
45 | #include "ehca_irq.h" | |
46 | #include "ehca_iverbs.h" | |
47 | #include "ehca_tools.h" | |
48 | #include "hcp_if.h" | |
49 | #include "hipz_fns.h" | |
7e28db5d | 50 | #include "ipz_pt_fn.h" |
fab97220 | 51 | |
2b94397a HNN |
52 | #define EQE_COMPLETION_EVENT EHCA_BMASK_IBM( 1, 1) |
53 | #define EQE_CQ_QP_NUMBER EHCA_BMASK_IBM( 8, 31) | |
54 | #define EQE_EE_IDENTIFIER EHCA_BMASK_IBM( 2, 7) | |
55 | #define EQE_CQ_NUMBER EHCA_BMASK_IBM( 8, 31) | |
56 | #define EQE_QP_NUMBER EHCA_BMASK_IBM( 8, 31) | |
57 | #define EQE_QP_TOKEN EHCA_BMASK_IBM(32, 63) | |
58 | #define EQE_CQ_TOKEN EHCA_BMASK_IBM(32, 63) | |
59 | ||
60 | #define NEQE_COMPLETION_EVENT EHCA_BMASK_IBM( 1, 1) | |
61 | #define NEQE_EVENT_CODE EHCA_BMASK_IBM( 2, 7) | |
62 | #define NEQE_PORT_NUMBER EHCA_BMASK_IBM( 8, 15) | |
63 | #define NEQE_PORT_AVAILABILITY EHCA_BMASK_IBM(16, 16) | |
64 | #define NEQE_DISRUPTIVE EHCA_BMASK_IBM(16, 16) | |
e57d62a1 | 65 | #define NEQE_SPECIFIC_EVENT EHCA_BMASK_IBM(16, 23) |
2b94397a HNN |
66 | |
67 | #define ERROR_DATA_LENGTH EHCA_BMASK_IBM(52, 63) | |
68 | #define ERROR_DATA_TYPE EHCA_BMASK_IBM( 0, 7) | |
fab97220 | 69 | |
fab97220 HS |
70 | static void queue_comp_task(struct ehca_cq *__cq); |
71 | ||
2b94397a | 72 | static struct ehca_comp_pool *pool; |
fab97220 | 73 | |
fab97220 HS |
74 | static inline void comp_event_callback(struct ehca_cq *cq) |
75 | { | |
76 | if (!cq->ib_cq.comp_handler) | |
77 | return; | |
78 | ||
79 | spin_lock(&cq->cb_lock); | |
80 | cq->ib_cq.comp_handler(&cq->ib_cq, cq->ib_cq.cq_context); | |
81 | spin_unlock(&cq->cb_lock); | |
82 | ||
83 | return; | |
84 | } | |
85 | ||
2b94397a HNN |
86 | static void print_error_data(struct ehca_shca *shca, void *data, |
87 | u64 *rblock, int length) | |
fab97220 HS |
88 | { |
89 | u64 type = EHCA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]); | |
90 | u64 resource = rblock[1]; | |
91 | ||
92 | switch (type) { | |
93 | case 0x1: /* Queue Pair */ | |
94 | { | |
2b94397a | 95 | struct ehca_qp *qp = (struct ehca_qp *)data; |
fab97220 HS |
96 | |
97 | /* only print error data if AER is set */ | |
98 | if (rblock[6] == 0) | |
99 | return; | |
100 | ||
101 | ehca_err(&shca->ib_device, | |
102 | "QP 0x%x (resource=%lx) has errors.", | |
103 | qp->ib_qp.qp_num, resource); | |
104 | break; | |
105 | } | |
106 | case 0x4: /* Completion Queue */ | |
107 | { | |
2b94397a | 108 | struct ehca_cq *cq = (struct ehca_cq *)data; |
fab97220 HS |
109 | |
110 | ehca_err(&shca->ib_device, | |
111 | "CQ 0x%x (resource=%lx) has errors.", | |
112 | cq->cq_number, resource); | |
113 | break; | |
114 | } | |
115 | default: | |
116 | ehca_err(&shca->ib_device, | |
0e6ff158 | 117 | "Unknown error type: %lx on %s.", |
fab97220 HS |
118 | type, shca->ib_device.name); |
119 | break; | |
120 | } | |
121 | ||
122 | ehca_err(&shca->ib_device, "Error data is available: %lx.", resource); | |
123 | ehca_err(&shca->ib_device, "EHCA ----- error data begin " | |
124 | "---------------------------------------------------"); | |
125 | ehca_dmp(rblock, length, "resource=%lx", resource); | |
126 | ehca_err(&shca->ib_device, "EHCA ----- error data end " | |
127 | "----------------------------------------------------"); | |
128 | ||
129 | return; | |
130 | } | |
131 | ||
132 | int ehca_error_data(struct ehca_shca *shca, void *data, | |
133 | u64 resource) | |
134 | { | |
135 | ||
136 | unsigned long ret; | |
137 | u64 *rblock; | |
138 | unsigned long block_count; | |
139 | ||
f2d91361 | 140 | rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC); |
fab97220 HS |
141 | if (!rblock) { |
142 | ehca_err(&shca->ib_device, "Cannot allocate rblock memory."); | |
143 | ret = -ENOMEM; | |
144 | goto error_data1; | |
145 | } | |
146 | ||
7e28db5d | 147 | /* rblock must be 4K aligned and should be 4K large */ |
fab97220 HS |
148 | ret = hipz_h_error_data(shca->ipz_hca_handle, |
149 | resource, | |
150 | rblock, | |
151 | &block_count); | |
152 | ||
7e28db5d | 153 | if (ret == H_R_STATE) |
fab97220 HS |
154 | ehca_err(&shca->ib_device, |
155 | "No error data is available: %lx.", resource); | |
fab97220 HS |
156 | else if (ret == H_SUCCESS) { |
157 | int length; | |
158 | ||
159 | length = EHCA_BMASK_GET(ERROR_DATA_LENGTH, rblock[0]); | |
160 | ||
7e28db5d HNN |
161 | if (length > EHCA_PAGESIZE) |
162 | length = EHCA_PAGESIZE; | |
fab97220 HS |
163 | |
164 | print_error_data(shca, data, rblock, length); | |
7e28db5d | 165 | } else |
fab97220 HS |
166 | ehca_err(&shca->ib_device, |
167 | "Error data could not be fetched: %lx", resource); | |
fab97220 | 168 | |
7e28db5d | 169 | ehca_free_fw_ctrlblock(rblock); |
fab97220 HS |
170 | |
171 | error_data1: | |
172 | return ret; | |
173 | ||
174 | } | |
175 | ||
5ff70cac JF |
176 | static void dispatch_qp_event(struct ehca_shca *shca, struct ehca_qp *qp, |
177 | enum ib_event_type event_type) | |
fab97220 HS |
178 | { |
179 | struct ib_event event; | |
fab97220 | 180 | |
5b673b71 JF |
181 | /* PATH_MIG without the QP ever having been armed is false alarm */ |
182 | if (event_type == IB_EVENT_PATH_MIG && !qp->mig_armed) | |
183 | return; | |
184 | ||
633a5aed | 185 | event.device = &shca->ib_device; |
5ff70cac | 186 | event.event = event_type; |
fab97220 | 187 | |
633a5aed HNN |
188 | if (qp->ext_type == EQPT_SRQ) { |
189 | if (!qp->ib_srq.event_handler) | |
190 | return; | |
fab97220 | 191 | |
633a5aed HNN |
192 | event.element.srq = &qp->ib_srq; |
193 | qp->ib_srq.event_handler(&event, qp->ib_srq.srq_context); | |
194 | } else { | |
195 | if (!qp->ib_qp.event_handler) | |
196 | return; | |
197 | ||
633a5aed HNN |
198 | event.element.qp = &qp->ib_qp; |
199 | qp->ib_qp.event_handler(&event, qp->ib_qp.qp_context); | |
200 | } | |
5ff70cac JF |
201 | } |
202 | ||
203 | static void qp_event_callback(struct ehca_shca *shca, u64 eqe, | |
204 | enum ib_event_type event_type, int fatal) | |
205 | { | |
206 | struct ehca_qp *qp; | |
207 | u32 token = EHCA_BMASK_GET(EQE_QP_TOKEN, eqe); | |
208 | ||
209 | read_lock(&ehca_qp_idr_lock); | |
210 | qp = idr_find(&ehca_qp_idr, token); | |
12137c59 SR |
211 | if (qp) |
212 | atomic_inc(&qp->nr_events); | |
5ff70cac JF |
213 | read_unlock(&ehca_qp_idr_lock); |
214 | ||
215 | if (!qp) | |
216 | return; | |
217 | ||
218 | if (fatal) | |
219 | ehca_error_data(shca, qp, qp->ipz_qp_handle.handle); | |
220 | ||
221 | dispatch_qp_event(shca, qp, fatal && qp->ext_type == EQPT_SRQ ? | |
222 | IB_EVENT_SRQ_ERR : event_type); | |
223 | ||
224 | /* | |
225 | * eHCA only processes one WQE at a time for SRQ base QPs, | |
226 | * so the last WQE has been processed as soon as the QP enters | |
227 | * error state. | |
228 | */ | |
229 | if (fatal && qp->ext_type == EQPT_SRQBASE) | |
230 | dispatch_qp_event(shca, qp, IB_EVENT_QP_LAST_WQE_REACHED); | |
fab97220 | 231 | |
12137c59 SR |
232 | if (atomic_dec_and_test(&qp->nr_events)) |
233 | wake_up(&qp->wait_completion); | |
fab97220 HS |
234 | return; |
235 | } | |
236 | ||
237 | static void cq_event_callback(struct ehca_shca *shca, | |
78d8d5f9 | 238 | u64 eqe) |
fab97220 HS |
239 | { |
240 | struct ehca_cq *cq; | |
fab97220 HS |
241 | u32 token = EHCA_BMASK_GET(EQE_CQ_TOKEN, eqe); |
242 | ||
26ed687f | 243 | read_lock(&ehca_cq_idr_lock); |
fab97220 | 244 | cq = idr_find(&ehca_cq_idr, token); |
28db6beb JF |
245 | if (cq) |
246 | atomic_inc(&cq->nr_events); | |
26ed687f | 247 | read_unlock(&ehca_cq_idr_lock); |
fab97220 HS |
248 | |
249 | if (!cq) | |
250 | return; | |
251 | ||
252 | ehca_error_data(shca, cq, cq->ipz_cq_handle.handle); | |
253 | ||
28db6beb JF |
254 | if (atomic_dec_and_test(&cq->nr_events)) |
255 | wake_up(&cq->wait_completion); | |
256 | ||
fab97220 HS |
257 | return; |
258 | } | |
259 | ||
260 | static void parse_identifier(struct ehca_shca *shca, u64 eqe) | |
261 | { | |
262 | u8 identifier = EHCA_BMASK_GET(EQE_EE_IDENTIFIER, eqe); | |
263 | ||
264 | switch (identifier) { | |
265 | case 0x02: /* path migrated */ | |
633a5aed | 266 | qp_event_callback(shca, eqe, IB_EVENT_PATH_MIG, 0); |
fab97220 HS |
267 | break; |
268 | case 0x03: /* communication established */ | |
633a5aed | 269 | qp_event_callback(shca, eqe, IB_EVENT_COMM_EST, 0); |
fab97220 HS |
270 | break; |
271 | case 0x04: /* send queue drained */ | |
633a5aed | 272 | qp_event_callback(shca, eqe, IB_EVENT_SQ_DRAINED, 0); |
fab97220 HS |
273 | break; |
274 | case 0x05: /* QP error */ | |
275 | case 0x06: /* QP error */ | |
633a5aed | 276 | qp_event_callback(shca, eqe, IB_EVENT_QP_FATAL, 1); |
fab97220 HS |
277 | break; |
278 | case 0x07: /* CQ error */ | |
279 | case 0x08: /* CQ error */ | |
280 | cq_event_callback(shca, eqe); | |
281 | break; | |
282 | case 0x09: /* MRMWPTE error */ | |
283 | ehca_err(&shca->ib_device, "MRMWPTE error."); | |
284 | break; | |
285 | case 0x0A: /* port event */ | |
286 | ehca_err(&shca->ib_device, "Port event."); | |
287 | break; | |
288 | case 0x0B: /* MR access error */ | |
289 | ehca_err(&shca->ib_device, "MR access error."); | |
290 | break; | |
291 | case 0x0C: /* EQ error */ | |
292 | ehca_err(&shca->ib_device, "EQ error."); | |
293 | break; | |
294 | case 0x0D: /* P/Q_Key mismatch */ | |
295 | ehca_err(&shca->ib_device, "P/Q_Key mismatch."); | |
296 | break; | |
297 | case 0x10: /* sampling complete */ | |
298 | ehca_err(&shca->ib_device, "Sampling complete."); | |
299 | break; | |
300 | case 0x11: /* unaffiliated access error */ | |
301 | ehca_err(&shca->ib_device, "Unaffiliated access error."); | |
302 | break; | |
e90d0b3d JF |
303 | case 0x12: /* path migrating */ |
304 | ehca_err(&shca->ib_device, "Path migrating."); | |
fab97220 HS |
305 | break; |
306 | case 0x13: /* interface trace stopped */ | |
307 | ehca_err(&shca->ib_device, "Interface trace stopped."); | |
308 | break; | |
309 | case 0x14: /* first error capture info available */ | |
633a5aed HNN |
310 | ehca_info(&shca->ib_device, "First error capture available"); |
311 | break; | |
312 | case 0x15: /* SRQ limit reached */ | |
313 | qp_event_callback(shca, eqe, IB_EVENT_SRQ_LIMIT_REACHED, 0); | |
314 | break; | |
fab97220 HS |
315 | default: |
316 | ehca_err(&shca->ib_device, "Unknown identifier: %x on %s.", | |
317 | identifier, shca->ib_device.name); | |
318 | break; | |
319 | } | |
320 | ||
321 | return; | |
322 | } | |
323 | ||
8705ce5b JF |
324 | static void dispatch_port_event(struct ehca_shca *shca, int port_num, |
325 | enum ib_event_type type, const char *msg) | |
fab97220 HS |
326 | { |
327 | struct ib_event event; | |
8705ce5b JF |
328 | |
329 | ehca_info(&shca->ib_device, "port %d %s.", port_num, msg); | |
330 | event.device = &shca->ib_device; | |
331 | event.event = type; | |
332 | event.element.port_num = port_num; | |
333 | ib_dispatch_event(&event); | |
334 | } | |
335 | ||
336 | static void notify_port_conf_change(struct ehca_shca *shca, int port_num) | |
337 | { | |
338 | struct ehca_sma_attr new_attr; | |
339 | struct ehca_sma_attr *old_attr = &shca->sport[port_num - 1].saved_attr; | |
340 | ||
341 | ehca_query_sma_attr(shca, port_num, &new_attr); | |
342 | ||
343 | if (new_attr.sm_sl != old_attr->sm_sl || | |
344 | new_attr.sm_lid != old_attr->sm_lid) | |
345 | dispatch_port_event(shca, port_num, IB_EVENT_SM_CHANGE, | |
346 | "SM changed"); | |
347 | ||
348 | if (new_attr.lid != old_attr->lid || | |
349 | new_attr.lmc != old_attr->lmc) | |
350 | dispatch_port_event(shca, port_num, IB_EVENT_LID_CHANGE, | |
351 | "LID changed"); | |
352 | ||
353 | if (new_attr.pkey_tbl_len != old_attr->pkey_tbl_len || | |
354 | memcmp(new_attr.pkeys, old_attr->pkeys, | |
355 | sizeof(u16) * new_attr.pkey_tbl_len)) | |
356 | dispatch_port_event(shca, port_num, IB_EVENT_PKEY_CHANGE, | |
357 | "P_Key changed"); | |
358 | ||
359 | *old_attr = new_attr; | |
360 | } | |
361 | ||
fad96ab6 SR |
362 | /* replay modify_qp for sqps -- return 0 if all is well, 1 if AQP1 destroyed */ |
363 | static int replay_modify_qp(struct ehca_sport *sport) | |
364 | { | |
365 | int aqp1_destroyed; | |
366 | unsigned long flags; | |
367 | ||
368 | spin_lock_irqsave(&sport->mod_sqp_lock, flags); | |
369 | ||
370 | aqp1_destroyed = !sport->ibqp_sqp[IB_QPT_GSI]; | |
371 | ||
372 | if (sport->ibqp_sqp[IB_QPT_SMI]) | |
373 | ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_SMI]); | |
374 | if (!aqp1_destroyed) | |
375 | ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_GSI]); | |
376 | ||
377 | spin_unlock_irqrestore(&sport->mod_sqp_lock, flags); | |
378 | ||
379 | return aqp1_destroyed; | |
380 | } | |
381 | ||
8705ce5b JF |
382 | static void parse_ec(struct ehca_shca *shca, u64 eqe) |
383 | { | |
fab97220 HS |
384 | u8 ec = EHCA_BMASK_GET(NEQE_EVENT_CODE, eqe); |
385 | u8 port = EHCA_BMASK_GET(NEQE_PORT_NUMBER, eqe); | |
e57d62a1 | 386 | u8 spec_event; |
bbdd267e | 387 | struct ehca_sport *sport = &shca->sport[port - 1]; |
fab97220 HS |
388 | |
389 | switch (ec) { | |
390 | case 0x30: /* port availability change */ | |
391 | if (EHCA_BMASK_GET(NEQE_PORT_AVAILABILITY, eqe)) { | |
fad96ab6 SR |
392 | /* only replay modify_qp calls in autodetect mode; |
393 | * if AQP1 was destroyed, the port is already down | |
394 | * again and we can drop the event. | |
395 | */ | |
396 | if (ehca_nr_ports < 0) | |
397 | if (replay_modify_qp(sport)) | |
398 | break; | |
bbdd267e HNN |
399 | |
400 | sport->port_state = IB_PORT_ACTIVE; | |
8705ce5b JF |
401 | dispatch_port_event(shca, port, IB_EVENT_PORT_ACTIVE, |
402 | "is active"); | |
fad96ab6 | 403 | ehca_query_sma_attr(shca, port, &sport->saved_attr); |
fab97220 | 404 | } else { |
bbdd267e | 405 | sport->port_state = IB_PORT_DOWN; |
8705ce5b JF |
406 | dispatch_port_event(shca, port, IB_EVENT_PORT_ERR, |
407 | "is inactive"); | |
fab97220 HS |
408 | } |
409 | break; | |
410 | case 0x31: | |
411 | /* port configuration change | |
412 | * disruptive change is caused by | |
413 | * LID, PKEY or SM change | |
414 | */ | |
8705ce5b JF |
415 | if (EHCA_BMASK_GET(NEQE_DISRUPTIVE, eqe)) { |
416 | ehca_warn(&shca->ib_device, "disruptive port " | |
417 | "%d configuration change", port); | |
418 | ||
bbdd267e | 419 | sport->port_state = IB_PORT_DOWN; |
8705ce5b JF |
420 | dispatch_port_event(shca, port, IB_EVENT_PORT_ERR, |
421 | "is inactive"); | |
422 | ||
bbdd267e | 423 | sport->port_state = IB_PORT_ACTIVE; |
8705ce5b JF |
424 | dispatch_port_event(shca, port, IB_EVENT_PORT_ACTIVE, |
425 | "is active"); | |
528b03f7 JF |
426 | ehca_query_sma_attr(shca, port, |
427 | &sport->saved_attr); | |
8705ce5b JF |
428 | } else |
429 | notify_port_conf_change(shca, port); | |
fab97220 HS |
430 | break; |
431 | case 0x32: /* adapter malfunction */ | |
432 | ehca_err(&shca->ib_device, "Adapter malfunction."); | |
433 | break; | |
434 | case 0x33: /* trace stopped */ | |
435 | ehca_err(&shca->ib_device, "Traced stopped."); | |
436 | break; | |
e57d62a1 HNN |
437 | case 0x34: /* util async event */ |
438 | spec_event = EHCA_BMASK_GET(NEQE_SPECIFIC_EVENT, eqe); | |
439 | if (spec_event == 0x80) /* client reregister required */ | |
440 | dispatch_port_event(shca, port, | |
441 | IB_EVENT_CLIENT_REREGISTER, | |
442 | "client reregister req."); | |
443 | else | |
444 | ehca_warn(&shca->ib_device, "Unknown util async " | |
445 | "event %x on port %x", spec_event, port); | |
446 | break; | |
fab97220 HS |
447 | default: |
448 | ehca_err(&shca->ib_device, "Unknown event code: %x on %s.", | |
449 | ec, shca->ib_device.name); | |
450 | break; | |
451 | } | |
452 | ||
453 | return; | |
454 | } | |
455 | ||
456 | static inline void reset_eq_pending(struct ehca_cq *cq) | |
457 | { | |
458 | u64 CQx_EP; | |
459 | struct h_galpa gal = cq->galpas.kernel; | |
460 | ||
461 | hipz_galpa_store_cq(gal, cqx_ep, 0x0); | |
462 | CQx_EP = hipz_galpa_load(gal, CQTEMM_OFFSET(cqx_ep)); | |
463 | ||
464 | return; | |
465 | } | |
466 | ||
7d12e780 | 467 | irqreturn_t ehca_interrupt_neq(int irq, void *dev_id) |
fab97220 HS |
468 | { |
469 | struct ehca_shca *shca = (struct ehca_shca*)dev_id; | |
470 | ||
471 | tasklet_hi_schedule(&shca->neq.interrupt_task); | |
472 | ||
473 | return IRQ_HANDLED; | |
474 | } | |
475 | ||
476 | void ehca_tasklet_neq(unsigned long data) | |
477 | { | |
478 | struct ehca_shca *shca = (struct ehca_shca*)data; | |
479 | struct ehca_eqe *eqe; | |
480 | u64 ret; | |
481 | ||
482 | eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->neq); | |
483 | ||
484 | while (eqe) { | |
485 | if (!EHCA_BMASK_GET(NEQE_COMPLETION_EVENT, eqe->entry)) | |
486 | parse_ec(shca, eqe->entry); | |
487 | ||
488 | eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->neq); | |
489 | } | |
490 | ||
491 | ret = hipz_h_reset_event(shca->ipz_hca_handle, | |
492 | shca->neq.ipz_eq_handle, 0xFFFFFFFFFFFFFFFFL); | |
493 | ||
494 | if (ret != H_SUCCESS) | |
495 | ehca_err(&shca->ib_device, "Can't clear notification events."); | |
496 | ||
497 | return; | |
498 | } | |
499 | ||
7d12e780 | 500 | irqreturn_t ehca_interrupt_eq(int irq, void *dev_id) |
fab97220 HS |
501 | { |
502 | struct ehca_shca *shca = (struct ehca_shca*)dev_id; | |
503 | ||
504 | tasklet_hi_schedule(&shca->eq.interrupt_task); | |
505 | ||
506 | return IRQ_HANDLED; | |
507 | } | |
508 | ||
fab97220 | 509 | |
78d8d5f9 HNN |
510 | static inline void process_eqe(struct ehca_shca *shca, struct ehca_eqe *eqe) |
511 | { | |
512 | u64 eqe_value; | |
513 | u32 token; | |
78d8d5f9 | 514 | struct ehca_cq *cq; |
31726798 | 515 | |
78d8d5f9 HNN |
516 | eqe_value = eqe->entry; |
517 | ehca_dbg(&shca->ib_device, "eqe_value=%lx", eqe_value); | |
518 | if (EHCA_BMASK_GET(EQE_COMPLETION_EVENT, eqe_value)) { | |
31726798 | 519 | ehca_dbg(&shca->ib_device, "Got completion event"); |
78d8d5f9 | 520 | token = EHCA_BMASK_GET(EQE_CQ_TOKEN, eqe_value); |
26ed687f | 521 | read_lock(&ehca_cq_idr_lock); |
78d8d5f9 | 522 | cq = idr_find(&ehca_cq_idr, token); |
28db6beb JF |
523 | if (cq) |
524 | atomic_inc(&cq->nr_events); | |
26ed687f | 525 | read_unlock(&ehca_cq_idr_lock); |
78d8d5f9 | 526 | if (cq == NULL) { |
78d8d5f9 HNN |
527 | ehca_err(&shca->ib_device, |
528 | "Invalid eqe for non-existing cq token=%x", | |
529 | token); | |
530 | return; | |
531 | } | |
532 | reset_eq_pending(cq); | |
31726798 | 533 | if (ehca_scaling_code) |
4fd30060 | 534 | queue_comp_task(cq); |
31726798 | 535 | else { |
4fd30060 | 536 | comp_event_callback(cq); |
28db6beb | 537 | if (atomic_dec_and_test(&cq->nr_events)) |
31726798 | 538 | wake_up(&cq->wait_completion); |
4fd30060 | 539 | } |
78d8d5f9 | 540 | } else { |
31726798 | 541 | ehca_dbg(&shca->ib_device, "Got non completion event"); |
78d8d5f9 HNN |
542 | parse_identifier(shca, eqe_value); |
543 | } | |
544 | } | |
fab97220 | 545 | |
78d8d5f9 HNN |
546 | void ehca_process_eq(struct ehca_shca *shca, int is_irq) |
547 | { | |
548 | struct ehca_eq *eq = &shca->eq; | |
549 | struct ehca_eqe_cache_entry *eqe_cache = eq->eqe_cache; | |
6f7bc01a | 550 | u64 eqe_value, ret; |
78d8d5f9 HNN |
551 | unsigned long flags; |
552 | int eqe_cnt, i; | |
553 | int eq_empty = 0; | |
554 | ||
555 | spin_lock_irqsave(&eq->irq_spinlock, flags); | |
556 | if (is_irq) { | |
557 | const int max_query_cnt = 100; | |
558 | int query_cnt = 0; | |
559 | int int_state = 1; | |
560 | do { | |
561 | int_state = hipz_h_query_int_state( | |
562 | shca->ipz_hca_handle, eq->ist); | |
563 | query_cnt++; | |
564 | iosync(); | |
565 | } while (int_state && query_cnt < max_query_cnt); | |
566 | if (unlikely((query_cnt == max_query_cnt))) | |
567 | ehca_dbg(&shca->ib_device, "int_state=%x query_cnt=%x", | |
568 | int_state, query_cnt); | |
569 | } | |
fab97220 | 570 | |
78d8d5f9 HNN |
571 | /* read out all eqes */ |
572 | eqe_cnt = 0; | |
573 | do { | |
574 | u32 token; | |
575 | eqe_cache[eqe_cnt].eqe = | |
576 | (struct ehca_eqe *)ehca_poll_eq(shca, eq); | |
577 | if (!eqe_cache[eqe_cnt].eqe) | |
578 | break; | |
579 | eqe_value = eqe_cache[eqe_cnt].eqe->entry; | |
580 | if (EHCA_BMASK_GET(EQE_COMPLETION_EVENT, eqe_value)) { | |
581 | token = EHCA_BMASK_GET(EQE_CQ_TOKEN, eqe_value); | |
26ed687f | 582 | read_lock(&ehca_cq_idr_lock); |
78d8d5f9 | 583 | eqe_cache[eqe_cnt].cq = idr_find(&ehca_cq_idr, token); |
28db6beb JF |
584 | if (eqe_cache[eqe_cnt].cq) |
585 | atomic_inc(&eqe_cache[eqe_cnt].cq->nr_events); | |
26ed687f | 586 | read_unlock(&ehca_cq_idr_lock); |
78d8d5f9 | 587 | if (!eqe_cache[eqe_cnt].cq) { |
78d8d5f9 HNN |
588 | ehca_err(&shca->ib_device, |
589 | "Invalid eqe for non-existing cq " | |
590 | "token=%x", token); | |
591 | continue; | |
592 | } | |
78d8d5f9 HNN |
593 | } else |
594 | eqe_cache[eqe_cnt].cq = NULL; | |
595 | eqe_cnt++; | |
596 | } while (eqe_cnt < EHCA_EQE_CACHE_SIZE); | |
597 | if (!eqe_cnt) { | |
598 | if (is_irq) | |
599 | ehca_dbg(&shca->ib_device, | |
600 | "No eqe found for irq event"); | |
601 | goto unlock_irq_spinlock; | |
6f7bc01a SR |
602 | } else if (!is_irq) { |
603 | ret = hipz_h_eoi(eq->ist); | |
604 | if (ret != H_SUCCESS) | |
605 | ehca_err(&shca->ib_device, | |
606 | "bad return code EOI -rc = %ld\n", ret); | |
78d8d5f9 | 607 | ehca_dbg(&shca->ib_device, "deadman found %x eqe", eqe_cnt); |
6f7bc01a | 608 | } |
78d8d5f9 HNN |
609 | if (unlikely(eqe_cnt == EHCA_EQE_CACHE_SIZE)) |
610 | ehca_dbg(&shca->ib_device, "too many eqes for one irq event"); | |
611 | /* enable irq for new packets */ | |
612 | for (i = 0; i < eqe_cnt; i++) { | |
613 | if (eq->eqe_cache[i].cq) | |
614 | reset_eq_pending(eq->eqe_cache[i].cq); | |
615 | } | |
616 | /* check eq */ | |
617 | spin_lock(&eq->spinlock); | |
618 | eq_empty = (!ipz_eqit_eq_peek_valid(&shca->eq.ipz_queue)); | |
619 | spin_unlock(&eq->spinlock); | |
620 | /* call completion handler for cached eqes */ | |
621 | for (i = 0; i < eqe_cnt; i++) | |
622 | if (eq->eqe_cache[i].cq) { | |
31726798 | 623 | if (ehca_scaling_code) |
4fd30060 | 624 | queue_comp_task(eq->eqe_cache[i].cq); |
31726798 HNN |
625 | else { |
626 | struct ehca_cq *cq = eq->eqe_cache[i].cq; | |
627 | comp_event_callback(cq); | |
28db6beb | 628 | if (atomic_dec_and_test(&cq->nr_events)) |
31726798 | 629 | wake_up(&cq->wait_completion); |
31726798 | 630 | } |
78d8d5f9 HNN |
631 | } else { |
632 | ehca_dbg(&shca->ib_device, "Got non completion event"); | |
633 | parse_identifier(shca, eq->eqe_cache[i].eqe->entry); | |
fab97220 | 634 | } |
78d8d5f9 HNN |
635 | /* poll eq if not empty */ |
636 | if (eq_empty) | |
637 | goto unlock_irq_spinlock; | |
638 | do { | |
639 | struct ehca_eqe *eqe; | |
640 | eqe = (struct ehca_eqe *)ehca_poll_eq(shca, &shca->eq); | |
641 | if (!eqe) | |
642 | break; | |
643 | process_eqe(shca, eqe); | |
78d8d5f9 HNN |
644 | } while (1); |
645 | ||
646 | unlock_irq_spinlock: | |
647 | spin_unlock_irqrestore(&eq->irq_spinlock, flags); | |
648 | } | |
fab97220 | 649 | |
78d8d5f9 HNN |
650 | void ehca_tasklet_eq(unsigned long data) |
651 | { | |
652 | ehca_process_eq((struct ehca_shca*)data, 1); | |
fab97220 HS |
653 | } |
654 | ||
2b94397a | 655 | static inline int find_next_online_cpu(struct ehca_comp_pool *pool) |
fab97220 | 656 | { |
8b16cef3 HNN |
657 | int cpu; |
658 | unsigned long flags; | |
fab97220 | 659 | |
8b16cef3 | 660 | WARN_ON_ONCE(!in_interrupt()); |
4da27d6d | 661 | if (ehca_debug_level >= 3) |
fab97220 HS |
662 | ehca_dmp(&cpu_online_map, sizeof(cpumask_t), ""); |
663 | ||
8b16cef3 | 664 | spin_lock_irqsave(&pool->last_cpu_lock, flags); |
5d7bfd0c MT |
665 | cpu = next_cpu_nr(pool->last_cpu, cpu_online_map); |
666 | if (cpu >= nr_cpu_ids) | |
8b16cef3 HNN |
667 | cpu = first_cpu(cpu_online_map); |
668 | pool->last_cpu = cpu; | |
669 | spin_unlock_irqrestore(&pool->last_cpu_lock, flags); | |
fab97220 | 670 | |
8b16cef3 | 671 | return cpu; |
fab97220 HS |
672 | } |
673 | ||
674 | static void __queue_comp_task(struct ehca_cq *__cq, | |
675 | struct ehca_cpu_comp_task *cct) | |
676 | { | |
8b16cef3 | 677 | unsigned long flags; |
fab97220 | 678 | |
8b16cef3 HNN |
679 | spin_lock_irqsave(&cct->task_lock, flags); |
680 | spin_lock(&__cq->task_lock); | |
fab97220 HS |
681 | |
682 | if (__cq->nr_callbacks == 0) { | |
683 | __cq->nr_callbacks++; | |
684 | list_add_tail(&__cq->entry, &cct->cq_list); | |
685 | cct->cq_jobs++; | |
686 | wake_up(&cct->wait_queue); | |
31726798 | 687 | } else |
fab97220 HS |
688 | __cq->nr_callbacks++; |
689 | ||
8b16cef3 HNN |
690 | spin_unlock(&__cq->task_lock); |
691 | spin_unlock_irqrestore(&cct->task_lock, flags); | |
fab97220 HS |
692 | } |
693 | ||
694 | static void queue_comp_task(struct ehca_cq *__cq) | |
695 | { | |
fab97220 HS |
696 | int cpu_id; |
697 | struct ehca_cpu_comp_task *cct; | |
31726798 HNN |
698 | int cq_jobs; |
699 | unsigned long flags; | |
fab97220 | 700 | |
fab97220 | 701 | cpu_id = find_next_online_cpu(pool); |
fab97220 HS |
702 | BUG_ON(!cpu_online(cpu_id)); |
703 | ||
704 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu_id); | |
8b16cef3 | 705 | BUG_ON(!cct); |
fab97220 | 706 | |
31726798 HNN |
707 | spin_lock_irqsave(&cct->task_lock, flags); |
708 | cq_jobs = cct->cq_jobs; | |
709 | spin_unlock_irqrestore(&cct->task_lock, flags); | |
710 | if (cq_jobs > 0) { | |
fab97220 HS |
711 | cpu_id = find_next_online_cpu(pool); |
712 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu_id); | |
8b16cef3 | 713 | BUG_ON(!cct); |
fab97220 HS |
714 | } |
715 | ||
716 | __queue_comp_task(__cq, cct); | |
fab97220 HS |
717 | } |
718 | ||
2b94397a | 719 | static void run_comp_task(struct ehca_cpu_comp_task *cct) |
fab97220 HS |
720 | { |
721 | struct ehca_cq *cq; | |
8b16cef3 | 722 | unsigned long flags; |
fab97220 | 723 | |
8b16cef3 | 724 | spin_lock_irqsave(&cct->task_lock, flags); |
fab97220 HS |
725 | |
726 | while (!list_empty(&cct->cq_list)) { | |
727 | cq = list_entry(cct->cq_list.next, struct ehca_cq, entry); | |
8b16cef3 | 728 | spin_unlock_irqrestore(&cct->task_lock, flags); |
fab97220 | 729 | |
28db6beb JF |
730 | comp_event_callback(cq); |
731 | if (atomic_dec_and_test(&cq->nr_events)) | |
31726798 | 732 | wake_up(&cq->wait_completion); |
31726798 HNN |
733 | |
734 | spin_lock_irqsave(&cct->task_lock, flags); | |
8b16cef3 | 735 | spin_lock(&cq->task_lock); |
fab97220 | 736 | cq->nr_callbacks--; |
31726798 | 737 | if (!cq->nr_callbacks) { |
fab97220 HS |
738 | list_del_init(cct->cq_list.next); |
739 | cct->cq_jobs--; | |
740 | } | |
8b16cef3 | 741 | spin_unlock(&cq->task_lock); |
fab97220 HS |
742 | } |
743 | ||
8b16cef3 | 744 | spin_unlock_irqrestore(&cct->task_lock, flags); |
fab97220 HS |
745 | } |
746 | ||
747 | static int comp_task(void *__cct) | |
748 | { | |
2b94397a | 749 | struct ehca_cpu_comp_task *cct = __cct; |
8b16cef3 | 750 | int cql_empty; |
fab97220 HS |
751 | DECLARE_WAITQUEUE(wait, current); |
752 | ||
753 | set_current_state(TASK_INTERRUPTIBLE); | |
2b94397a | 754 | while (!kthread_should_stop()) { |
fab97220 HS |
755 | add_wait_queue(&cct->wait_queue, &wait); |
756 | ||
8b16cef3 HNN |
757 | spin_lock_irq(&cct->task_lock); |
758 | cql_empty = list_empty(&cct->cq_list); | |
759 | spin_unlock_irq(&cct->task_lock); | |
760 | if (cql_empty) | |
fab97220 HS |
761 | schedule(); |
762 | else | |
763 | __set_current_state(TASK_RUNNING); | |
764 | ||
765 | remove_wait_queue(&cct->wait_queue, &wait); | |
766 | ||
8b16cef3 HNN |
767 | spin_lock_irq(&cct->task_lock); |
768 | cql_empty = list_empty(&cct->cq_list); | |
769 | spin_unlock_irq(&cct->task_lock); | |
770 | if (!cql_empty) | |
fab97220 HS |
771 | run_comp_task(__cct); |
772 | ||
773 | set_current_state(TASK_INTERRUPTIBLE); | |
774 | } | |
775 | __set_current_state(TASK_RUNNING); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | static struct task_struct *create_comp_task(struct ehca_comp_pool *pool, | |
781 | int cpu) | |
782 | { | |
783 | struct ehca_cpu_comp_task *cct; | |
784 | ||
785 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu); | |
786 | spin_lock_init(&cct->task_lock); | |
787 | INIT_LIST_HEAD(&cct->cq_list); | |
788 | init_waitqueue_head(&cct->wait_queue); | |
789 | cct->task = kthread_create(comp_task, cct, "ehca_comp/%d", cpu); | |
790 | ||
791 | return cct->task; | |
792 | } | |
793 | ||
794 | static void destroy_comp_task(struct ehca_comp_pool *pool, | |
795 | int cpu) | |
796 | { | |
797 | struct ehca_cpu_comp_task *cct; | |
798 | struct task_struct *task; | |
799 | unsigned long flags_cct; | |
800 | ||
801 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu); | |
802 | ||
803 | spin_lock_irqsave(&cct->task_lock, flags_cct); | |
804 | ||
805 | task = cct->task; | |
806 | cct->task = NULL; | |
807 | cct->cq_jobs = 0; | |
808 | ||
809 | spin_unlock_irqrestore(&cct->task_lock, flags_cct); | |
810 | ||
811 | if (task) | |
812 | kthread_stop(task); | |
fab97220 HS |
813 | } |
814 | ||
9faa559c | 815 | static void __cpuinit take_over_work(struct ehca_comp_pool *pool, int cpu) |
fab97220 HS |
816 | { |
817 | struct ehca_cpu_comp_task *cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu); | |
818 | LIST_HEAD(list); | |
819 | struct ehca_cq *cq; | |
820 | unsigned long flags_cct; | |
821 | ||
822 | spin_lock_irqsave(&cct->task_lock, flags_cct); | |
823 | ||
824 | list_splice_init(&cct->cq_list, &list); | |
825 | ||
2b94397a | 826 | while (!list_empty(&list)) { |
78d8d5f9 | 827 | cq = list_entry(cct->cq_list.next, struct ehca_cq, entry); |
fab97220 | 828 | |
78d8d5f9 HNN |
829 | list_del(&cq->entry); |
830 | __queue_comp_task(cq, per_cpu_ptr(pool->cpu_comp_tasks, | |
831 | smp_processor_id())); | |
fab97220 HS |
832 | } |
833 | ||
834 | spin_unlock_irqrestore(&cct->task_lock, flags_cct); | |
835 | ||
836 | } | |
837 | ||
9faa559c SS |
838 | static int __cpuinit comp_pool_callback(struct notifier_block *nfb, |
839 | unsigned long action, | |
840 | void *hcpu) | |
fab97220 HS |
841 | { |
842 | unsigned int cpu = (unsigned long)hcpu; | |
843 | struct ehca_cpu_comp_task *cct; | |
844 | ||
845 | switch (action) { | |
846 | case CPU_UP_PREPARE: | |
8bb78442 | 847 | case CPU_UP_PREPARE_FROZEN: |
fab97220 | 848 | ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu); |
2b94397a | 849 | if (!create_comp_task(pool, cpu)) { |
fab97220 HS |
850 | ehca_gen_err("Can't create comp_task for cpu: %x", cpu); |
851 | return NOTIFY_BAD; | |
852 | } | |
853 | break; | |
854 | case CPU_UP_CANCELED: | |
8bb78442 | 855 | case CPU_UP_CANCELED_FROZEN: |
fab97220 HS |
856 | ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu); |
857 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu); | |
858 | kthread_bind(cct->task, any_online_cpu(cpu_online_map)); | |
859 | destroy_comp_task(pool, cpu); | |
860 | break; | |
861 | case CPU_ONLINE: | |
8bb78442 | 862 | case CPU_ONLINE_FROZEN: |
fab97220 HS |
863 | ehca_gen_dbg("CPU: %x (CPU_ONLINE)", cpu); |
864 | cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu); | |
865 | kthread_bind(cct->task, cpu); | |
866 | wake_up_process(cct->task); | |
867 | break; | |
868 | case CPU_DOWN_PREPARE: | |
8bb78442 | 869 | case CPU_DOWN_PREPARE_FROZEN: |
fab97220 HS |
870 | ehca_gen_dbg("CPU: %x (CPU_DOWN_PREPARE)", cpu); |
871 | break; | |
872 | case CPU_DOWN_FAILED: | |
8bb78442 | 873 | case CPU_DOWN_FAILED_FROZEN: |
fab97220 HS |
874 | ehca_gen_dbg("CPU: %x (CPU_DOWN_FAILED)", cpu); |
875 | break; | |
876 | case CPU_DEAD: | |
8bb78442 | 877 | case CPU_DEAD_FROZEN: |
fab97220 HS |
878 | ehca_gen_dbg("CPU: %x (CPU_DEAD)", cpu); |
879 | destroy_comp_task(pool, cpu); | |
880 | take_over_work(pool, cpu); | |
881 | break; | |
882 | } | |
883 | ||
884 | return NOTIFY_OK; | |
885 | } | |
9faa559c SS |
886 | |
887 | static struct notifier_block comp_pool_callback_nb __cpuinitdata = { | |
888 | .notifier_call = comp_pool_callback, | |
889 | .priority = 0, | |
890 | }; | |
fab97220 | 891 | |
fab97220 HS |
892 | int ehca_create_comp_pool(void) |
893 | { | |
fab97220 HS |
894 | int cpu; |
895 | struct task_struct *task; | |
896 | ||
4fd30060 HNN |
897 | if (!ehca_scaling_code) |
898 | return 0; | |
899 | ||
fab97220 HS |
900 | pool = kzalloc(sizeof(struct ehca_comp_pool), GFP_KERNEL); |
901 | if (pool == NULL) | |
902 | return -ENOMEM; | |
903 | ||
904 | spin_lock_init(&pool->last_cpu_lock); | |
905 | pool->last_cpu = any_online_cpu(cpu_online_map); | |
906 | ||
907 | pool->cpu_comp_tasks = alloc_percpu(struct ehca_cpu_comp_task); | |
908 | if (pool->cpu_comp_tasks == NULL) { | |
909 | kfree(pool); | |
910 | return -EINVAL; | |
911 | } | |
912 | ||
913 | for_each_online_cpu(cpu) { | |
914 | task = create_comp_task(pool, cpu); | |
915 | if (task) { | |
916 | kthread_bind(task, cpu); | |
917 | wake_up_process(task); | |
918 | } | |
919 | } | |
920 | ||
9faa559c | 921 | register_hotcpu_notifier(&comp_pool_callback_nb); |
4fd30060 HNN |
922 | |
923 | printk(KERN_INFO "eHCA scaling code enabled\n"); | |
fab97220 HS |
924 | |
925 | return 0; | |
926 | } | |
927 | ||
928 | void ehca_destroy_comp_pool(void) | |
929 | { | |
fab97220 HS |
930 | int i; |
931 | ||
4fd30060 HNN |
932 | if (!ehca_scaling_code) |
933 | return; | |
934 | ||
9faa559c | 935 | unregister_hotcpu_notifier(&comp_pool_callback_nb); |
fab97220 HS |
936 | |
937 | for (i = 0; i < NR_CPUS; i++) { | |
938 | if (cpu_online(i)) | |
939 | destroy_comp_task(pool, i); | |
940 | } | |
65e5c026 AM |
941 | free_percpu(pool->cpu_comp_tasks); |
942 | kfree(pool); | |
fab97220 | 943 | } |