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17#include <linux/export.h>
18#include <linux/sched.h>
19#include <linux/wait.h>
20#include <linux/pm_runtime.h>
21#include <linux/slab.h>
22
23#include <linux/mei.h>
24
25#include "mei_dev.h"
26#include "hbm.h"
27#include "client.h"
28
29static const char *mei_hbm_status_str(enum mei_hbm_status status)
30{
31#define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status
32 switch (status) {
33 MEI_HBM_STATUS(SUCCESS);
34 MEI_HBM_STATUS(CLIENT_NOT_FOUND);
35 MEI_HBM_STATUS(ALREADY_EXISTS);
36 MEI_HBM_STATUS(REJECTED);
37 MEI_HBM_STATUS(INVALID_PARAMETER);
38 MEI_HBM_STATUS(NOT_ALLOWED);
39 MEI_HBM_STATUS(ALREADY_STARTED);
40 MEI_HBM_STATUS(NOT_STARTED);
41 default: return "unknown";
42 }
43#undef MEI_HBM_STATUS
44};
45
46static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
47{
48#define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status
49 switch (status) {
50 MEI_CL_CS(SUCCESS);
51 MEI_CL_CS(NOT_FOUND);
52 MEI_CL_CS(ALREADY_STARTED);
53 MEI_CL_CS(OUT_OF_RESOURCES);
54 MEI_CL_CS(MESSAGE_SMALL);
55 MEI_CL_CS(NOT_ALLOWED);
56 default: return "unknown";
57 }
58#undef MEI_CL_CCS
59}
60
61const char *mei_hbm_state_str(enum mei_hbm_state state)
62{
63#define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state
64 switch (state) {
65 MEI_HBM_STATE(IDLE);
66 MEI_HBM_STATE(STARTING);
67 MEI_HBM_STATE(STARTED);
68 MEI_HBM_STATE(ENUM_CLIENTS);
69 MEI_HBM_STATE(CLIENT_PROPERTIES);
70 MEI_HBM_STATE(STOPPED);
71 default:
72 return "unknown";
73 }
74#undef MEI_HBM_STATE
75}
76
77
78
79
80
81
82
83
84
85static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
86{
87 switch (status) {
88 case MEI_CL_CONN_SUCCESS: return 0;
89 case MEI_CL_CONN_NOT_FOUND: return -ENOTTY;
90 case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
91 case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
92 case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
93 case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY;
94 default: return -EINVAL;
95 }
96}
97
98
99
100
101
102
103void mei_hbm_idle(struct mei_device *dev)
104{
105 dev->init_clients_timer = 0;
106 dev->hbm_state = MEI_HBM_IDLE;
107}
108
109
110
111
112
113
114void mei_hbm_reset(struct mei_device *dev)
115{
116 mei_me_cl_rm_all(dev);
117
118 mei_hbm_idle(dev);
119}
120
121
122
123
124
125
126
127
128static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
129{
130 hdr->host_addr = 0;
131 hdr->me_addr = 0;
132 hdr->length = length;
133 hdr->msg_complete = 1;
134 hdr->reserved = 0;
135 hdr->internal = 0;
136}
137
138
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142
143
144
145
146static inline
147void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
148{
149 struct mei_hbm_cl_cmd *cmd = buf;
150
151 memset(cmd, 0, len);
152
153 cmd->hbm_cmd = hbm_cmd;
154 cmd->host_addr = mei_cl_host_addr(cl);
155 cmd->me_addr = mei_cl_me_id(cl);
156}
157
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162
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164
165
166
167
168static inline
169int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl,
170 u8 hbm_cmd, u8 *buf, size_t len)
171{
172 struct mei_msg_hdr mei_hdr;
173
174 mei_hbm_hdr(&mei_hdr, len);
175 mei_hbm_cl_hdr(cl, hbm_cmd, buf, len);
176
177 return mei_write_message(dev, &mei_hdr, buf);
178}
179
180
181
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183
184
185
186
187
188
189static inline
190bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd)
191{
192 return mei_cl_host_addr(cl) == cmd->host_addr &&
193 mei_cl_me_id(cl) == cmd->me_addr;
194}
195
196
197
198
199
200
201
202
203
204static inline
205struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf)
206{
207 struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf;
208 struct mei_cl *cl;
209
210 list_for_each_entry(cl, &dev->file_list, link)
211 if (mei_hbm_cl_addr_equal(cl, cmd))
212 return cl;
213 return NULL;
214}
215
216
217
218
219
220
221
222
223
224int mei_hbm_start_wait(struct mei_device *dev)
225{
226 int ret;
227
228 if (dev->hbm_state > MEI_HBM_STARTING)
229 return 0;
230
231 mutex_unlock(&dev->device_lock);
232 ret = wait_event_timeout(dev->wait_hbm_start,
233 dev->hbm_state != MEI_HBM_STARTING,
234 mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
235 mutex_lock(&dev->device_lock);
236
237 if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {
238 dev->hbm_state = MEI_HBM_IDLE;
239 dev_err(dev->dev, "waiting for mei start failed\n");
240 return -ETIME;
241 }
242 return 0;
243}
244
245
246
247
248
249
250
251
252int mei_hbm_start_req(struct mei_device *dev)
253{
254 struct mei_msg_hdr mei_hdr;
255 struct hbm_host_version_request start_req;
256 const size_t len = sizeof(struct hbm_host_version_request);
257 int ret;
258
259 mei_hbm_reset(dev);
260
261 mei_hbm_hdr(&mei_hdr, len);
262
263
264 memset(&start_req, 0, len);
265 start_req.hbm_cmd = HOST_START_REQ_CMD;
266 start_req.host_version.major_version = HBM_MAJOR_VERSION;
267 start_req.host_version.minor_version = HBM_MINOR_VERSION;
268
269 dev->hbm_state = MEI_HBM_IDLE;
270 ret = mei_write_message(dev, &mei_hdr, &start_req);
271 if (ret) {
272 dev_err(dev->dev, "version message write failed: ret = %d\n",
273 ret);
274 return ret;
275 }
276
277 dev->hbm_state = MEI_HBM_STARTING;
278 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
279 return 0;
280}
281
282
283
284
285
286
287
288
289static int mei_hbm_enum_clients_req(struct mei_device *dev)
290{
291 struct mei_msg_hdr mei_hdr;
292 struct hbm_host_enum_request enum_req;
293 const size_t len = sizeof(struct hbm_host_enum_request);
294 int ret;
295
296
297 mei_hbm_hdr(&mei_hdr, len);
298
299 memset(&enum_req, 0, len);
300 enum_req.hbm_cmd = HOST_ENUM_REQ_CMD;
301 enum_req.flags |= dev->hbm_f_dc_supported ?
302 MEI_HBM_ENUM_F_ALLOW_ADD : 0;
303 enum_req.flags |= dev->hbm_f_ie_supported ?
304 MEI_HBM_ENUM_F_IMMEDIATE_ENUM : 0;
305
306 ret = mei_write_message(dev, &mei_hdr, &enum_req);
307 if (ret) {
308 dev_err(dev->dev, "enumeration request write failed: ret = %d.\n",
309 ret);
310 return ret;
311 }
312 dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
313 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
314 return 0;
315}
316
317
318
319
320
321
322
323
324
325
326static int mei_hbm_me_cl_add(struct mei_device *dev,
327 struct hbm_props_response *res)
328{
329 struct mei_me_client *me_cl;
330 const uuid_le *uuid = &res->client_properties.protocol_name;
331
332 mei_me_cl_rm_by_uuid(dev, uuid);
333
334 me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL);
335 if (!me_cl)
336 return -ENOMEM;
337
338 mei_me_cl_init(me_cl);
339
340 me_cl->props = res->client_properties;
341 me_cl->client_id = res->me_addr;
342 me_cl->mei_flow_ctrl_creds = 0;
343
344 mei_me_cl_add(dev, me_cl);
345
346 return 0;
347}
348
349
350
351
352
353
354
355
356
357
358static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status)
359{
360 struct mei_msg_hdr mei_hdr;
361 struct hbm_add_client_response resp;
362 const size_t len = sizeof(struct hbm_add_client_response);
363 int ret;
364
365 dev_dbg(dev->dev, "adding client response\n");
366
367 mei_hbm_hdr(&mei_hdr, len);
368
369 memset(&resp, 0, sizeof(struct hbm_add_client_response));
370 resp.hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD;
371 resp.me_addr = addr;
372 resp.status = status;
373
374 ret = mei_write_message(dev, &mei_hdr, &resp);
375 if (ret)
376 dev_err(dev->dev, "add client response write failed: ret = %d\n",
377 ret);
378 return ret;
379}
380
381
382
383
384
385
386
387
388
389static int mei_hbm_fw_add_cl_req(struct mei_device *dev,
390 struct hbm_add_client_request *req)
391{
392 int ret;
393 u8 status = MEI_HBMS_SUCCESS;
394
395 BUILD_BUG_ON(sizeof(struct hbm_add_client_request) !=
396 sizeof(struct hbm_props_response));
397
398 ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req);
399 if (ret)
400 status = !MEI_HBMS_SUCCESS;
401
402 if (dev->dev_state == MEI_DEV_ENABLED)
403 schedule_work(&dev->bus_rescan_work);
404
405 return mei_hbm_add_cl_resp(dev, req->me_addr, status);
406}
407
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409
410
411
412
413
414
415
416
417int mei_hbm_cl_notify_req(struct mei_device *dev,
418 struct mei_cl *cl, u8 start)
419{
420
421 struct mei_msg_hdr mei_hdr;
422 struct hbm_notification_request req;
423 const size_t len = sizeof(struct hbm_notification_request);
424 int ret;
425
426 mei_hbm_hdr(&mei_hdr, len);
427 mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, &req, len);
428
429 req.start = start;
430
431 ret = mei_write_message(dev, &mei_hdr, &req);
432 if (ret)
433 dev_err(dev->dev, "notify request failed: ret = %d\n", ret);
434
435 return ret;
436}
437
438
439
440
441
442
443
444
445
446static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd)
447{
448 struct hbm_notification_response *rs =
449 (struct hbm_notification_response *)cmd;
450
451 return mei_cl_notify_req2fop(rs->start);
452}
453
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455
456
457
458
459
460
461
462static void mei_hbm_cl_notify_start_res(struct mei_device *dev,
463 struct mei_cl *cl,
464 struct mei_hbm_cl_cmd *cmd)
465{
466 struct hbm_notification_response *rs =
467 (struct hbm_notification_response *)cmd;
468
469 cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status);
470
471 if (rs->status == MEI_HBMS_SUCCESS ||
472 rs->status == MEI_HBMS_ALREADY_STARTED) {
473 cl->notify_en = true;
474 cl->status = 0;
475 } else {
476 cl->status = -EINVAL;
477 }
478}
479
480
481
482
483
484
485
486
487
488static void mei_hbm_cl_notify_stop_res(struct mei_device *dev,
489 struct mei_cl *cl,
490 struct mei_hbm_cl_cmd *cmd)
491{
492 struct hbm_notification_response *rs =
493 (struct hbm_notification_response *)cmd;
494
495 cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status);
496
497 if (rs->status == MEI_HBMS_SUCCESS ||
498 rs->status == MEI_HBMS_NOT_STARTED) {
499 cl->notify_en = false;
500 cl->status = 0;
501 } else {
502
503 cl->status = -EINVAL;
504 }
505}
506
507
508
509
510
511
512
513static void mei_hbm_cl_notify(struct mei_device *dev,
514 struct mei_hbm_cl_cmd *cmd)
515{
516 struct mei_cl *cl;
517
518 cl = mei_hbm_cl_find_by_cmd(dev, cmd);
519 if (cl)
520 mei_cl_notify(cl);
521}
522
523
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526
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529
530
531static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx)
532{
533 struct mei_msg_hdr mei_hdr;
534 struct hbm_props_request prop_req;
535 const size_t len = sizeof(struct hbm_props_request);
536 unsigned long addr;
537 int ret;
538
539 addr = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, start_idx);
540
541
542 if (addr == MEI_CLIENTS_MAX) {
543 dev->hbm_state = MEI_HBM_STARTED;
544 mei_host_client_init(dev);
545
546 return 0;
547 }
548
549 mei_hbm_hdr(&mei_hdr, len);
550
551 memset(&prop_req, 0, sizeof(struct hbm_props_request));
552
553 prop_req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
554 prop_req.me_addr = addr;
555
556 ret = mei_write_message(dev, &mei_hdr, &prop_req);
557 if (ret) {
558 dev_err(dev->dev, "properties request write failed: ret = %d\n",
559 ret);
560 return ret;
561 }
562
563 dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
564
565 return 0;
566}
567
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571
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575
576
577int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)
578{
579 struct mei_msg_hdr mei_hdr;
580 struct hbm_power_gate req;
581 const size_t len = sizeof(struct hbm_power_gate);
582 int ret;
583
584 if (!dev->hbm_f_pg_supported)
585 return -EOPNOTSUPP;
586
587 mei_hbm_hdr(&mei_hdr, len);
588
589 memset(&req, 0, len);
590 req.hbm_cmd = pg_cmd;
591
592 ret = mei_write_message(dev, &mei_hdr, &req);
593 if (ret)
594 dev_err(dev->dev, "power gate command write failed.\n");
595 return ret;
596}
597EXPORT_SYMBOL_GPL(mei_hbm_pg);
598
599
600
601
602
603
604
605
606static int mei_hbm_stop_req(struct mei_device *dev)
607{
608 struct mei_msg_hdr mei_hdr;
609 struct hbm_host_stop_request req;
610 const size_t len = sizeof(struct hbm_host_stop_request);
611
612 mei_hbm_hdr(&mei_hdr, len);
613
614 memset(&req, 0, len);
615 req.hbm_cmd = HOST_STOP_REQ_CMD;
616 req.reason = DRIVER_STOP_REQUEST;
617
618 return mei_write_message(dev, &mei_hdr, &req);
619}
620
621
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623
624
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626
627
628
629int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
630{
631 const size_t len = sizeof(struct hbm_flow_control);
632 u8 buf[len];
633
634 cl_dbg(dev, cl, "sending flow control\n");
635 return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, buf, len);
636}
637
638
639
640
641
642
643
644
645
646static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
647 struct hbm_flow_control *flow)
648{
649 struct mei_me_client *me_cl;
650 int rets;
651
652 me_cl = mei_me_cl_by_id(dev, flow->me_addr);
653 if (!me_cl) {
654 dev_err(dev->dev, "no such me client %d\n",
655 flow->me_addr);
656 return -ENOENT;
657 }
658
659 if (WARN_ON(me_cl->props.single_recv_buf == 0)) {
660 rets = -EINVAL;
661 goto out;
662 }
663
664 me_cl->mei_flow_ctrl_creds++;
665 dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",
666 flow->me_addr, me_cl->mei_flow_ctrl_creds);
667
668 rets = 0;
669out:
670 mei_me_cl_put(me_cl);
671 return rets;
672}
673
674
675
676
677
678
679
680static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
681 struct hbm_flow_control *flow_control)
682{
683 struct mei_cl *cl;
684
685 if (!flow_control->host_addr) {
686
687 mei_hbm_add_single_flow_creds(dev, flow_control);
688 return;
689 }
690
691 cl = mei_hbm_cl_find_by_cmd(dev, flow_control);
692 if (cl) {
693 cl->mei_flow_ctrl_creds++;
694 cl_dbg(dev, cl, "flow control creds = %d.\n",
695 cl->mei_flow_ctrl_creds);
696 }
697}
698
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703
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705
706
707
708int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
709{
710 const size_t len = sizeof(struct hbm_client_connect_request);
711 u8 buf[len];
712
713 return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, buf, len);
714}
715
716
717
718
719
720
721
722
723
724int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)
725{
726 const size_t len = sizeof(struct hbm_client_connect_response);
727 u8 buf[len];
728
729 return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, buf, len);
730}
731
732
733
734
735
736
737
738
739
740static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl,
741 struct mei_hbm_cl_cmd *cmd)
742{
743 struct hbm_client_connect_response *rs =
744 (struct hbm_client_connect_response *)cmd;
745
746 cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status);
747
748 if (rs->status == MEI_CL_DISCONN_SUCCESS)
749 cl->state = MEI_FILE_DISCONNECT_REPLY;
750 cl->status = 0;
751}
752
753
754
755
756
757
758
759
760
761int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
762{
763 const size_t len = sizeof(struct hbm_client_connect_request);
764 u8 buf[len];
765
766 return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, buf, len);
767}
768
769
770
771
772
773
774
775
776
777static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl,
778 struct mei_hbm_cl_cmd *cmd)
779{
780 struct hbm_client_connect_response *rs =
781 (struct hbm_client_connect_response *)cmd;
782
783 cl_dbg(dev, cl, "hbm: connect response status=%s\n",
784 mei_cl_conn_status_str(rs->status));
785
786 if (rs->status == MEI_CL_CONN_SUCCESS)
787 cl->state = MEI_FILE_CONNECTED;
788 else {
789 cl->state = MEI_FILE_DISCONNECT_REPLY;
790 if (rs->status == MEI_CL_CONN_NOT_FOUND) {
791 mei_me_cl_del(dev, cl->me_cl);
792 if (dev->dev_state == MEI_DEV_ENABLED)
793 schedule_work(&dev->bus_rescan_work);
794 }
795 }
796 cl->status = mei_cl_conn_status_to_errno(rs->status);
797}
798
799
800
801
802
803
804
805
806
807static void mei_hbm_cl_res(struct mei_device *dev,
808 struct mei_hbm_cl_cmd *rs,
809 enum mei_cb_file_ops fop_type)
810{
811 struct mei_cl *cl;
812 struct mei_cl_cb *cb, *next;
813
814 cl = NULL;
815 list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) {
816
817 cl = cb->cl;
818
819 if (cb->fop_type != fop_type)
820 continue;
821
822 if (mei_hbm_cl_addr_equal(cl, rs)) {
823 list_del_init(&cb->list);
824 break;
825 }
826 }
827
828 if (!cl)
829 return;
830
831 switch (fop_type) {
832 case MEI_FOP_CONNECT:
833 mei_hbm_cl_connect_res(dev, cl, rs);
834 break;
835 case MEI_FOP_DISCONNECT:
836 mei_hbm_cl_disconnect_res(dev, cl, rs);
837 break;
838 case MEI_FOP_NOTIFY_START:
839 mei_hbm_cl_notify_start_res(dev, cl, rs);
840 break;
841 case MEI_FOP_NOTIFY_STOP:
842 mei_hbm_cl_notify_stop_res(dev, cl, rs);
843 break;
844 default:
845 return;
846 }
847
848 cl->timer_count = 0;
849 wake_up(&cl->wait);
850}
851
852
853
854
855
856
857
858
859
860
861
862static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
863 struct hbm_client_connect_request *disconnect_req)
864{
865 struct mei_cl *cl;
866 struct mei_cl_cb *cb;
867
868 cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req);
869 if (cl) {
870 cl_warn(dev, cl, "fw disconnect request received\n");
871 cl->state = MEI_FILE_DISCONNECTING;
872 cl->timer_count = 0;
873
874 cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL);
875 if (!cb)
876 return -ENOMEM;
877 list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
878 }
879 return 0;
880}
881
882
883
884
885
886
887
888
889static int mei_hbm_pg_enter_res(struct mei_device *dev)
890{
891 if (mei_pg_state(dev) != MEI_PG_OFF ||
892 dev->pg_event != MEI_PG_EVENT_WAIT) {
893 dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n",
894 mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
895 return -EPROTO;
896 }
897
898 dev->pg_event = MEI_PG_EVENT_RECEIVED;
899 wake_up(&dev->wait_pg);
900
901 return 0;
902}
903
904
905
906
907
908
909void mei_hbm_pg_resume(struct mei_device *dev)
910{
911 pm_request_resume(dev->dev);
912}
913EXPORT_SYMBOL_GPL(mei_hbm_pg_resume);
914
915
916
917
918
919
920
921
922static int mei_hbm_pg_exit_res(struct mei_device *dev)
923{
924 if (mei_pg_state(dev) != MEI_PG_ON ||
925 (dev->pg_event != MEI_PG_EVENT_WAIT &&
926 dev->pg_event != MEI_PG_EVENT_IDLE)) {
927 dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n",
928 mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
929 return -EPROTO;
930 }
931
932 switch (dev->pg_event) {
933 case MEI_PG_EVENT_WAIT:
934 dev->pg_event = MEI_PG_EVENT_RECEIVED;
935 wake_up(&dev->wait_pg);
936 break;
937 case MEI_PG_EVENT_IDLE:
938
939
940
941
942
943 dev->pg_event = MEI_PG_EVENT_RECEIVED;
944 mei_hbm_pg_resume(dev);
945 break;
946 default:
947 WARN(1, "hbm: pg exit response: unexpected pg event = %d\n",
948 dev->pg_event);
949 return -EPROTO;
950 }
951
952 return 0;
953}
954
955
956
957
958
959
960
961static void mei_hbm_config_features(struct mei_device *dev)
962{
963
964 dev->hbm_f_pg_supported = 0;
965 if (dev->version.major_version > HBM_MAJOR_VERSION_PGI)
966 dev->hbm_f_pg_supported = 1;
967
968 if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&
969 dev->version.minor_version >= HBM_MINOR_VERSION_PGI)
970 dev->hbm_f_pg_supported = 1;
971
972 if (dev->version.major_version >= HBM_MAJOR_VERSION_DC)
973 dev->hbm_f_dc_supported = 1;
974
975 if (dev->version.major_version >= HBM_MAJOR_VERSION_IE)
976 dev->hbm_f_ie_supported = 1;
977
978
979 if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT)
980 dev->hbm_f_dot_supported = 1;
981
982
983 if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
984 dev->hbm_f_ev_supported = 1;
985
986
987 if (dev->version.major_version >= HBM_MAJOR_VERSION_FA)
988 dev->hbm_f_fa_supported = 1;
989}
990
991
992
993
994
995
996
997
998bool mei_hbm_version_is_supported(struct mei_device *dev)
999{
1000 return (dev->version.major_version < HBM_MAJOR_VERSION) ||
1001 (dev->version.major_version == HBM_MAJOR_VERSION &&
1002 dev->version.minor_version <= HBM_MINOR_VERSION);
1003}
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
1015{
1016 struct mei_bus_message *mei_msg;
1017 struct hbm_host_version_response *version_res;
1018 struct hbm_props_response *props_res;
1019 struct hbm_host_enum_response *enum_res;
1020 struct hbm_add_client_request *add_cl_req;
1021 int ret;
1022
1023 struct mei_hbm_cl_cmd *cl_cmd;
1024 struct hbm_client_connect_request *disconnect_req;
1025 struct hbm_flow_control *flow_control;
1026
1027
1028 BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
1029 mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
1030 mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
1031 cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg;
1032
1033
1034
1035
1036 if (dev->hbm_state == MEI_HBM_IDLE) {
1037 dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n");
1038 return 0;
1039 }
1040
1041 switch (mei_msg->hbm_cmd) {
1042 case HOST_START_RES_CMD:
1043 dev_dbg(dev->dev, "hbm: start: response message received.\n");
1044
1045 dev->init_clients_timer = 0;
1046
1047 version_res = (struct hbm_host_version_response *)mei_msg;
1048
1049 dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n",
1050 HBM_MAJOR_VERSION, HBM_MINOR_VERSION,
1051 version_res->me_max_version.major_version,
1052 version_res->me_max_version.minor_version);
1053
1054 if (version_res->host_version_supported) {
1055 dev->version.major_version = HBM_MAJOR_VERSION;
1056 dev->version.minor_version = HBM_MINOR_VERSION;
1057 } else {
1058 dev->version.major_version =
1059 version_res->me_max_version.major_version;
1060 dev->version.minor_version =
1061 version_res->me_max_version.minor_version;
1062 }
1063
1064 if (!mei_hbm_version_is_supported(dev)) {
1065 dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n");
1066
1067 dev->hbm_state = MEI_HBM_STOPPED;
1068 if (mei_hbm_stop_req(dev)) {
1069 dev_err(dev->dev, "hbm: start: failed to send stop request\n");
1070 return -EIO;
1071 }
1072 break;
1073 }
1074
1075 mei_hbm_config_features(dev);
1076
1077 if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
1078 dev->hbm_state != MEI_HBM_STARTING) {
1079 dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n",
1080 dev->dev_state, dev->hbm_state);
1081 return -EPROTO;
1082 }
1083
1084 if (mei_hbm_enum_clients_req(dev)) {
1085 dev_err(dev->dev, "hbm: start: failed to send enumeration request\n");
1086 return -EIO;
1087 }
1088
1089 wake_up(&dev->wait_hbm_start);
1090 break;
1091
1092 case CLIENT_CONNECT_RES_CMD:
1093 dev_dbg(dev->dev, "hbm: client connect response: message received.\n");
1094 mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT);
1095 break;
1096
1097 case CLIENT_DISCONNECT_RES_CMD:
1098 dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n");
1099 mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT);
1100 break;
1101
1102 case MEI_FLOW_CONTROL_CMD:
1103 dev_dbg(dev->dev, "hbm: client flow control response: message received.\n");
1104
1105 flow_control = (struct hbm_flow_control *) mei_msg;
1106 mei_hbm_cl_flow_control_res(dev, flow_control);
1107 break;
1108
1109 case MEI_PG_ISOLATION_ENTRY_RES_CMD:
1110 dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n");
1111 ret = mei_hbm_pg_enter_res(dev);
1112 if (ret)
1113 return ret;
1114 break;
1115
1116 case MEI_PG_ISOLATION_EXIT_REQ_CMD:
1117 dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n");
1118 ret = mei_hbm_pg_exit_res(dev);
1119 if (ret)
1120 return ret;
1121 break;
1122
1123 case HOST_CLIENT_PROPERTIES_RES_CMD:
1124 dev_dbg(dev->dev, "hbm: properties response: message received.\n");
1125
1126 dev->init_clients_timer = 0;
1127
1128 if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
1129 dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
1130 dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",
1131 dev->dev_state, dev->hbm_state);
1132 return -EPROTO;
1133 }
1134
1135 props_res = (struct hbm_props_response *)mei_msg;
1136
1137 if (props_res->status) {
1138 dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n",
1139 props_res->status,
1140 mei_hbm_status_str(props_res->status));
1141 return -EPROTO;
1142 }
1143
1144 mei_hbm_me_cl_add(dev, props_res);
1145
1146
1147 if (mei_hbm_prop_req(dev, props_res->me_addr + 1))
1148 return -EIO;
1149
1150 break;
1151
1152 case HOST_ENUM_RES_CMD:
1153 dev_dbg(dev->dev, "hbm: enumeration response: message received\n");
1154
1155 dev->init_clients_timer = 0;
1156
1157 enum_res = (struct hbm_host_enum_response *) mei_msg;
1158 BUILD_BUG_ON(sizeof(dev->me_clients_map)
1159 < sizeof(enum_res->valid_addresses));
1160 memcpy(dev->me_clients_map, enum_res->valid_addresses,
1161 sizeof(enum_res->valid_addresses));
1162
1163 if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
1164 dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
1165 dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n",
1166 dev->dev_state, dev->hbm_state);
1167 return -EPROTO;
1168 }
1169
1170 dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
1171
1172
1173 if (mei_hbm_prop_req(dev, 0))
1174 return -EIO;
1175
1176 break;
1177
1178 case HOST_STOP_RES_CMD:
1179 dev_dbg(dev->dev, "hbm: stop response: message received\n");
1180
1181 dev->init_clients_timer = 0;
1182
1183 if (dev->hbm_state != MEI_HBM_STOPPED) {
1184 dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n",
1185 dev->dev_state, dev->hbm_state);
1186 return -EPROTO;
1187 }
1188
1189 dev->dev_state = MEI_DEV_POWER_DOWN;
1190 dev_info(dev->dev, "hbm: stop response: resetting.\n");
1191
1192 return -EPROTO;
1193 break;
1194
1195 case CLIENT_DISCONNECT_REQ_CMD:
1196 dev_dbg(dev->dev, "hbm: disconnect request: message received\n");
1197
1198 disconnect_req = (struct hbm_client_connect_request *)mei_msg;
1199 mei_hbm_fw_disconnect_req(dev, disconnect_req);
1200 break;
1201
1202 case ME_STOP_REQ_CMD:
1203 dev_dbg(dev->dev, "hbm: stop request: message received\n");
1204 dev->hbm_state = MEI_HBM_STOPPED;
1205 if (mei_hbm_stop_req(dev)) {
1206 dev_err(dev->dev, "hbm: stop request: failed to send stop request\n");
1207 return -EIO;
1208 }
1209 break;
1210
1211 case MEI_HBM_ADD_CLIENT_REQ_CMD:
1212 dev_dbg(dev->dev, "hbm: add client request received\n");
1213
1214
1215
1216
1217 if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS ||
1218 dev->hbm_state >= MEI_HBM_STOPPED) {
1219 dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n",
1220 dev->dev_state, dev->hbm_state);
1221 return -EPROTO;
1222 }
1223 add_cl_req = (struct hbm_add_client_request *)mei_msg;
1224 ret = mei_hbm_fw_add_cl_req(dev, add_cl_req);
1225 if (ret) {
1226 dev_err(dev->dev, "hbm: add client: failed to send response %d\n",
1227 ret);
1228 return -EIO;
1229 }
1230 dev_dbg(dev->dev, "hbm: add client request processed\n");
1231 break;
1232
1233 case MEI_HBM_NOTIFY_RES_CMD:
1234 dev_dbg(dev->dev, "hbm: notify response received\n");
1235 mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd));
1236 break;
1237
1238 case MEI_HBM_NOTIFICATION_CMD:
1239 dev_dbg(dev->dev, "hbm: notification\n");
1240 mei_hbm_cl_notify(dev, cl_cmd);
1241 break;
1242
1243 default:
1244 BUG();
1245 break;
1246
1247 }
1248 return 0;
1249}
1250
1251