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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2013-2023, Intel Corporation. All rights reserved.
4 * Intel Management Engine Interface (Intel MEI) Linux driver
5 */
6
7#include <linux/kernel.h>
8#include <linux/sched.h>
9#include <linux/module.h>
10#include <linux/device.h>
11#include <linux/slab.h>
12
13#include <linux/mei.h>
14#include <linux/mei_cl_bus.h>
15
16#include "mei_dev.h"
17#include "client.h"
18#include "mkhi.h"
19
20#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
21 0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
22
23static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
24
25#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
26 0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
27
28#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
29 0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
30
31#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
32 0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
33
34#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
35 0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
36
37#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
38 0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
39
40#define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
41 0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
42
43#define MEI_UUID_PAVP UUID_LE(0xfbf6fcf1, 0x96cf, 0x4e2e, 0xA6, \
44 0xa6, 0x1b, 0xab, 0x8c, 0xbe, 0x36, 0xb1)
45
46#define MEI_UUID_ANY NULL_UUID_LE
47
48/**
49 * number_of_connections - determine whether an client be on the bus
50 * according number of connections
51 * We support only clients:
52 * 1. with single connection
53 * 2. and fixed clients (max_number_of_connections == 0)
54 *
55 * @cldev: me clients device
56 */
57static void number_of_connections(struct mei_cl_device *cldev)
58{
59 if (cldev->me_cl->props.max_number_of_connections > 1)
60 cldev->do_match = 0;
61}
62
63/**
64 * blacklist - blacklist a client from the bus
65 *
66 * @cldev: me clients device
67 */
68static void blacklist(struct mei_cl_device *cldev)
69{
70 cldev->do_match = 0;
71}
72
73/**
74 * whitelist - forcefully whitelist client
75 *
76 * @cldev: me clients device
77 */
78static void whitelist(struct mei_cl_device *cldev)
79{
80 cldev->do_match = 1;
81}
82
83#define MKHI_SEND_MAX_TIMEOUT_MSEC 4000
84
85#define OSTYPE_LINUX 2
86struct mei_os_ver {
87 __le16 build;
88 __le16 reserved1;
89 u8 os_type;
90 u8 major;
91 u8 minor;
92 u8 reserved2;
93} __packed;
94
95struct mkhi_fw_ver_block {
96 u16 minor;
97 u8 major;
98 u8 platform;
99 u16 buildno;
100 u16 hotfix;
101} __packed;
102
103struct mkhi_fw_ver {
104 struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
105} __packed;
106
107#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
108 sizeof(struct mkhi_fwcaps) + \
109 sizeof(struct mei_os_ver))
110static int mei_osver(struct mei_cl_device *cldev)
111{
112 const size_t size = MKHI_OSVER_BUF_LEN;
113 u8 buf[MKHI_OSVER_BUF_LEN];
114 struct mkhi_msg *req;
115 struct mkhi_fwcaps *fwcaps;
116 struct mei_os_ver *os_ver;
117 unsigned int mode = MEI_CL_IO_TX_BLOCKING | MEI_CL_IO_TX_INTERNAL;
118
119 memset(buf, 0, size);
120
121 req = (struct mkhi_msg *)buf;
122 req->hdr.group_id = MKHI_FWCAPS_GROUP_ID;
123 req->hdr.command = MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD;
124
125 fwcaps = (struct mkhi_fwcaps *)req->data;
126
127 fwcaps->id.rule_type = 0x0;
128 fwcaps->id.feature_id = MKHI_FEATURE_PTT;
129 fwcaps->len = sizeof(*os_ver);
130 os_ver = (struct mei_os_ver *)fwcaps->data;
131 os_ver->os_type = OSTYPE_LINUX;
132
133 return __mei_cl_send_timeout(cldev->cl, buf, size, 0, mode, MKHI_SEND_MAX_TIMEOUT_MSEC);
134}
135
136#define MKHI_FWVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
137 sizeof(struct mkhi_fw_ver))
138#define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
139 sizeof(struct mkhi_fw_ver_block) * (__num))
140static int mei_fwver(struct mei_cl_device *cldev)
141{
142 u8 buf[MKHI_FWVER_BUF_LEN];
143 struct mkhi_msg req;
144 struct mkhi_msg *rsp;
145 struct mkhi_fw_ver *fwver;
146 int bytes_recv, ret, i;
147
148 memset(buf, 0, sizeof(buf));
149
150 req.hdr.group_id = MKHI_GEN_GROUP_ID;
151 req.hdr.command = MKHI_GEN_GET_FW_VERSION_CMD;
152
153 ret = __mei_cl_send_timeout(cldev->cl, (u8 *)&req, sizeof(req), 0,
154 MEI_CL_IO_TX_BLOCKING, MKHI_SEND_MAX_TIMEOUT_MSEC);
155 if (ret < 0) {
156 dev_info(&cldev->dev, "Could not send ReqFWVersion cmd ret = %d\n", ret);
157 return ret;
158 }
159
160 ret = 0;
161 bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
162 cldev->bus->timeouts.mkhi_recv);
163 if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
164 /*
165 * Should be at least one version block,
166 * error out if nothing found
167 */
168 dev_info(&cldev->dev, "Could not read FW version ret = %d\n", bytes_recv);
169 return -EIO;
170 }
171
172 rsp = (struct mkhi_msg *)buf;
173 fwver = (struct mkhi_fw_ver *)rsp->data;
174 memset(cldev->bus->fw_ver, 0, sizeof(cldev->bus->fw_ver));
175 for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++) {
176 if ((size_t)bytes_recv < MKHI_FWVER_LEN(i + 1))
177 break;
178 dev_dbg(&cldev->dev, "FW version%d %d:%d.%d.%d.%d\n",
179 i, fwver->ver[i].platform,
180 fwver->ver[i].major, fwver->ver[i].minor,
181 fwver->ver[i].hotfix, fwver->ver[i].buildno);
182
183 cldev->bus->fw_ver[i].platform = fwver->ver[i].platform;
184 cldev->bus->fw_ver[i].major = fwver->ver[i].major;
185 cldev->bus->fw_ver[i].minor = fwver->ver[i].minor;
186 cldev->bus->fw_ver[i].hotfix = fwver->ver[i].hotfix;
187 cldev->bus->fw_ver[i].buildno = fwver->ver[i].buildno;
188 }
189 cldev->bus->fw_ver_received = 1;
190
191 return ret;
192}
193
194#define GFX_MEMORY_READY_TIMEOUT 200 /* timeout in milliseconds */
195
196static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
197{
198 struct mkhi_gfx_mem_ready req = {0};
199 unsigned int mode = MEI_CL_IO_TX_INTERNAL | MEI_CL_IO_TX_BLOCKING;
200
201 req.hdr.group_id = MKHI_GROUP_ID_GFX;
202 req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
203 req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
204
205 dev_dbg(&cldev->dev, "Sending memory ready command\n");
206 return __mei_cl_send_timeout(cldev->cl, (u8 *)&req, sizeof(req), 0,
207 mode, GFX_MEMORY_READY_TIMEOUT);
208}
209
210static void mei_mkhi_fix(struct mei_cl_device *cldev)
211{
212 int ret;
213
214 /* No need to enable the client if nothing is needed from it */
215 if (!cldev->bus->fw_f_fw_ver_supported &&
216 !cldev->bus->hbm_f_os_supported)
217 return;
218
219 ret = mei_cldev_enable(cldev);
220 if (ret)
221 return;
222
223 if (cldev->bus->fw_f_fw_ver_supported) {
224 ret = mei_fwver(cldev);
225 if (ret < 0)
226 dev_info(&cldev->dev, "FW version command failed %d\n",
227 ret);
228 }
229
230 if (cldev->bus->hbm_f_os_supported) {
231 ret = mei_osver(cldev);
232 if (ret < 0)
233 dev_info(&cldev->dev, "OS version command failed %d\n",
234 ret);
235 }
236 mei_cldev_disable(cldev);
237}
238
239static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
240{
241 int ret;
242
243 /*
244 * No need to enable the client if nothing is needed from it.
245 * No need to fill in version if it is already filled in by the fix address client.
246 */
247 if (!cldev->bus->fw_f_fw_ver_supported || cldev->bus->fw_ver_received)
248 return;
249
250 ret = mei_cldev_enable(cldev);
251 if (ret)
252 return;
253
254 ret = mei_fwver(cldev);
255 if (ret < 0)
256 dev_info(&cldev->dev, "FW version command failed %d\n", ret);
257 mei_cldev_disable(cldev);
258}
259
260static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
261{
262 int ret;
263
264 /* No need to enable the client if nothing is needed from it */
265 if (!cldev->bus->fw_f_fw_ver_supported &&
266 cldev->bus->pxp_mode != MEI_DEV_PXP_INIT)
267 return;
268
269 ret = mei_cldev_enable(cldev);
270 if (ret)
271 return;
272
273 if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
274 ret = mei_gfx_memory_ready(cldev);
275 if (ret < 0) {
276 dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
277 } else {
278 dev_dbg(&cldev->dev, "memory ready command sent\n");
279 cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
280 }
281 /* we go to reset after that */
282 goto out;
283 }
284
285 ret = mei_fwver(cldev);
286 if (ret < 0)
287 dev_info(&cldev->dev, "FW version command failed %d\n",
288 ret);
289out:
290 mei_cldev_disable(cldev);
291}
292
293/**
294 * mei_wd - wd client on the bus, change protocol version
295 * as the API has changed.
296 *
297 * @cldev: me clients device
298 */
299#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
300#include <linux/pci.h>
301#include "hw-me-regs.h"
302static void mei_wd(struct mei_cl_device *cldev)
303{
304 struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
305
306 if (pdev->device == MEI_DEV_ID_WPT_LP ||
307 pdev->device == MEI_DEV_ID_SPT ||
308 pdev->device == MEI_DEV_ID_SPT_H)
309 cldev->me_cl->props.protocol_version = 0x2;
310
311 cldev->do_match = 1;
312}
313#else
314static inline void mei_wd(struct mei_cl_device *cldev) {}
315#endif /* CONFIG_INTEL_MEI_ME */
316
317struct mei_nfc_cmd {
318 u8 command;
319 u8 status;
320 u16 req_id;
321 u32 reserved;
322 u16 data_size;
323 u8 sub_command;
324 u8 data[];
325} __packed;
326
327struct mei_nfc_reply {
328 u8 command;
329 u8 status;
330 u16 req_id;
331 u32 reserved;
332 u16 data_size;
333 u8 sub_command;
334 u8 reply_status;
335 u8 data[];
336} __packed;
337
338struct mei_nfc_if_version {
339 u8 radio_version_sw[3];
340 u8 reserved[3];
341 u8 radio_version_hw[3];
342 u8 i2c_addr;
343 u8 fw_ivn;
344 u8 vendor_id;
345 u8 radio_type;
346} __packed;
347
348
349#define MEI_NFC_CMD_MAINTENANCE 0x00
350#define MEI_NFC_SUBCMD_IF_VERSION 0x01
351
352/* Vendors */
353#define MEI_NFC_VENDOR_INSIDE 0x00
354#define MEI_NFC_VENDOR_NXP 0x01
355
356/* Radio types */
357#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
358#define MEI_NFC_VENDOR_NXP_PN544 0x01
359
360/**
361 * mei_nfc_if_version - get NFC interface version
362 *
363 * @cl: host client (nfc info)
364 * @ver: NFC interface version to be filled in
365 *
366 * Return: 0 on success; < 0 otherwise
367 */
368static int mei_nfc_if_version(struct mei_cl *cl,
369 struct mei_nfc_if_version *ver)
370{
371 struct mei_device *bus;
372 struct mei_nfc_cmd cmd = {
373 .command = MEI_NFC_CMD_MAINTENANCE,
374 .data_size = 1,
375 .sub_command = MEI_NFC_SUBCMD_IF_VERSION,
376 };
377 struct mei_nfc_reply *reply = NULL;
378 size_t if_version_length;
379 u8 vtag;
380 int bytes_recv, ret;
381
382 bus = cl->dev;
383
384 WARN_ON(mutex_is_locked(&bus->device_lock));
385
386 ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(cmd), 0,
387 MEI_CL_IO_TX_BLOCKING);
388 if (ret < 0) {
389 dev_err(bus->dev, "Could not send IF version cmd ret = %d\n", ret);
390 return ret;
391 }
392
393 /* to be sure on the stack we alloc memory */
394 if_version_length = sizeof(*reply) + sizeof(*ver);
395
396 reply = kzalloc(if_version_length, GFP_KERNEL);
397 if (!reply)
398 return -ENOMEM;
399
400 ret = 0;
401 bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length, &vtag,
402 0, 0);
403 if (bytes_recv < 0 || (size_t)bytes_recv < if_version_length) {
404 dev_err(bus->dev, "Could not read IF version ret = %d\n", bytes_recv);
405 ret = -EIO;
406 goto err;
407 }
408
409 memcpy(ver, reply->data, sizeof(*ver));
410
411 dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
412 ver->fw_ivn, ver->vendor_id, ver->radio_type);
413
414err:
415 kfree(reply);
416 return ret;
417}
418
419/**
420 * mei_nfc_radio_name - derive nfc radio name from the interface version
421 *
422 * @ver: NFC radio version
423 *
424 * Return: radio name string
425 */
426static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
427{
428
429 if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
430 if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
431 return "microread";
432 }
433
434 if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
435 if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
436 return "pn544";
437 }
438
439 return NULL;
440}
441
442/**
443 * mei_nfc - The nfc fixup function. The function retrieves nfc radio
444 * name and set is as device attribute so we can load
445 * the proper device driver for it
446 *
447 * @cldev: me client device (nfc)
448 */
449static void mei_nfc(struct mei_cl_device *cldev)
450{
451 struct mei_device *bus;
452 struct mei_cl *cl;
453 struct mei_me_client *me_cl = NULL;
454 struct mei_nfc_if_version ver;
455 const char *radio_name = NULL;
456 int ret;
457
458 bus = cldev->bus;
459
460 mutex_lock(&bus->device_lock);
461 /* we need to connect to INFO GUID */
462 cl = mei_cl_alloc_linked(bus);
463 if (IS_ERR(cl)) {
464 ret = PTR_ERR(cl);
465 cl = NULL;
466 dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
467 goto out;
468 }
469
470 me_cl = mei_me_cl_by_uuid(bus, &mei_nfc_info_guid);
471 if (!me_cl) {
472 ret = -ENOTTY;
473 dev_err(bus->dev, "Cannot find nfc info %d\n", ret);
474 goto out;
475 }
476
477 ret = mei_cl_connect(cl, me_cl, NULL);
478 if (ret < 0) {
479 dev_err(&cldev->dev, "Can't connect to the NFC INFO ME ret = %d\n",
480 ret);
481 goto out;
482 }
483
484 mutex_unlock(&bus->device_lock);
485
486 ret = mei_nfc_if_version(cl, &ver);
487 if (ret)
488 goto disconnect;
489
490 radio_name = mei_nfc_radio_name(&ver);
491
492 if (!radio_name) {
493 ret = -ENOENT;
494 dev_err(&cldev->dev, "Can't get the NFC interface version ret = %d\n",
495 ret);
496 goto disconnect;
497 }
498
499 dev_dbg(bus->dev, "nfc radio %s\n", radio_name);
500 strscpy(cldev->name, radio_name, sizeof(cldev->name));
501
502disconnect:
503 mutex_lock(&bus->device_lock);
504 if (mei_cl_disconnect(cl) < 0)
505 dev_err(bus->dev, "Can't disconnect the NFC INFO ME\n");
506
507 mei_cl_flush_queues(cl, NULL);
508
509out:
510 mei_cl_unlink(cl);
511 mutex_unlock(&bus->device_lock);
512 mei_me_cl_put(me_cl);
513 kfree(cl);
514
515 if (ret)
516 cldev->do_match = 0;
517
518 dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
519}
520
521/**
522 * vt_support - enable on bus clients with vtag support
523 *
524 * @cldev: me clients device
525 */
526static void vt_support(struct mei_cl_device *cldev)
527{
528 if (cldev->me_cl->props.vt_supported == 1)
529 cldev->do_match = 1;
530}
531
532/**
533 * pxp_is_ready - enable bus client if pxp is ready
534 *
535 * @cldev: me clients device
536 */
537static void pxp_is_ready(struct mei_cl_device *cldev)
538{
539 struct mei_device *bus = cldev->bus;
540
541 switch (bus->pxp_mode) {
542 case MEI_DEV_PXP_READY:
543 case MEI_DEV_PXP_DEFAULT:
544 cldev->do_match = 1;
545 break;
546 default:
547 cldev->do_match = 0;
548 break;
549 }
550}
551
552#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
553
554static struct mei_fixup {
555
556 const uuid_le uuid;
557 void (*hook)(struct mei_cl_device *cldev);
558} mei_fixups[] = {
559 MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
560 MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
561 MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
562 MEI_FIXUP(MEI_UUID_WD, mei_wd),
563 MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
564 MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
565 MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
566 MEI_FIXUP(MEI_UUID_HDCP, whitelist),
567 MEI_FIXUP(MEI_UUID_ANY, vt_support),
568 MEI_FIXUP(MEI_UUID_PAVP, pxp_is_ready),
569};
570
571/**
572 * mei_cl_bus_dev_fixup - run fixup handlers
573 *
574 * @cldev: me client device
575 */
576void mei_cl_bus_dev_fixup(struct mei_cl_device *cldev)
577{
578 struct mei_fixup *f;
579 const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
580 size_t i;
581
582 for (i = 0; i < ARRAY_SIZE(mei_fixups); i++) {
583
584 f = &mei_fixups[i];
585 if (uuid_le_cmp(f->uuid, MEI_UUID_ANY) == 0 ||
586 uuid_le_cmp(f->uuid, *uuid) == 0)
587 f->hook(cldev);
588 }
589}
590
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2013-2023, Intel Corporation. All rights reserved.
4 * Intel Management Engine Interface (Intel MEI) Linux driver
5 */
6
7#include <linux/kernel.h>
8#include <linux/sched.h>
9#include <linux/module.h>
10#include <linux/device.h>
11#include <linux/slab.h>
12
13#include <linux/mei.h>
14#include <linux/mei_cl_bus.h>
15
16#include "mei_dev.h"
17#include "client.h"
18#include "mkhi.h"
19
20#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
21 0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
22
23static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
24
25#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
26 0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
27
28#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
29 0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
30
31#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
32 0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
33
34#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
35 0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
36
37#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
38 0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
39
40#define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
41 0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
42
43#define MEI_UUID_PAVP UUID_LE(0xfbf6fcf1, 0x96cf, 0x4e2e, 0xA6, \
44 0xa6, 0x1b, 0xab, 0x8c, 0xbe, 0x36, 0xb1)
45
46#define MEI_UUID_ANY NULL_UUID_LE
47
48/**
49 * number_of_connections - determine whether an client be on the bus
50 * according number of connections
51 * We support only clients:
52 * 1. with single connection
53 * 2. and fixed clients (max_number_of_connections == 0)
54 *
55 * @cldev: me clients device
56 */
57static void number_of_connections(struct mei_cl_device *cldev)
58{
59 if (cldev->me_cl->props.max_number_of_connections > 1)
60 cldev->do_match = 0;
61}
62
63/**
64 * blacklist - blacklist a client from the bus
65 *
66 * @cldev: me clients device
67 */
68static void blacklist(struct mei_cl_device *cldev)
69{
70 cldev->do_match = 0;
71}
72
73/**
74 * whitelist - forcefully whitelist client
75 *
76 * @cldev: me clients device
77 */
78static void whitelist(struct mei_cl_device *cldev)
79{
80 cldev->do_match = 1;
81}
82
83#define OSTYPE_LINUX 2
84struct mei_os_ver {
85 __le16 build;
86 __le16 reserved1;
87 u8 os_type;
88 u8 major;
89 u8 minor;
90 u8 reserved2;
91} __packed;
92
93struct mkhi_fw_ver_block {
94 u16 minor;
95 u8 major;
96 u8 platform;
97 u16 buildno;
98 u16 hotfix;
99} __packed;
100
101struct mkhi_fw_ver {
102 struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
103} __packed;
104
105#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
106 sizeof(struct mkhi_fwcaps) + \
107 sizeof(struct mei_os_ver))
108static int mei_osver(struct mei_cl_device *cldev)
109{
110 const size_t size = MKHI_OSVER_BUF_LEN;
111 u8 buf[MKHI_OSVER_BUF_LEN];
112 struct mkhi_msg *req;
113 struct mkhi_fwcaps *fwcaps;
114 struct mei_os_ver *os_ver;
115 unsigned int mode = MEI_CL_IO_TX_BLOCKING | MEI_CL_IO_TX_INTERNAL;
116
117 memset(buf, 0, size);
118
119 req = (struct mkhi_msg *)buf;
120 req->hdr.group_id = MKHI_FWCAPS_GROUP_ID;
121 req->hdr.command = MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD;
122
123 fwcaps = (struct mkhi_fwcaps *)req->data;
124
125 fwcaps->id.rule_type = 0x0;
126 fwcaps->id.feature_id = MKHI_FEATURE_PTT;
127 fwcaps->len = sizeof(*os_ver);
128 os_ver = (struct mei_os_ver *)fwcaps->data;
129 os_ver->os_type = OSTYPE_LINUX;
130
131 return __mei_cl_send(cldev->cl, buf, size, 0, mode);
132}
133
134#define MKHI_FWVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
135 sizeof(struct mkhi_fw_ver))
136#define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
137 sizeof(struct mkhi_fw_ver_block) * (__num))
138static int mei_fwver(struct mei_cl_device *cldev)
139{
140 u8 buf[MKHI_FWVER_BUF_LEN];
141 struct mkhi_msg req;
142 struct mkhi_msg *rsp;
143 struct mkhi_fw_ver *fwver;
144 int bytes_recv, ret, i;
145
146 memset(buf, 0, sizeof(buf));
147
148 req.hdr.group_id = MKHI_GEN_GROUP_ID;
149 req.hdr.command = MKHI_GEN_GET_FW_VERSION_CMD;
150
151 ret = __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0,
152 MEI_CL_IO_TX_BLOCKING);
153 if (ret < 0) {
154 dev_info(&cldev->dev, "Could not send ReqFWVersion cmd ret = %d\n", ret);
155 return ret;
156 }
157
158 ret = 0;
159 bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
160 cldev->bus->timeouts.mkhi_recv);
161 if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
162 /*
163 * Should be at least one version block,
164 * error out if nothing found
165 */
166 dev_info(&cldev->dev, "Could not read FW version ret = %d\n", bytes_recv);
167 return -EIO;
168 }
169
170 rsp = (struct mkhi_msg *)buf;
171 fwver = (struct mkhi_fw_ver *)rsp->data;
172 memset(cldev->bus->fw_ver, 0, sizeof(cldev->bus->fw_ver));
173 for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++) {
174 if ((size_t)bytes_recv < MKHI_FWVER_LEN(i + 1))
175 break;
176 dev_dbg(&cldev->dev, "FW version%d %d:%d.%d.%d.%d\n",
177 i, fwver->ver[i].platform,
178 fwver->ver[i].major, fwver->ver[i].minor,
179 fwver->ver[i].hotfix, fwver->ver[i].buildno);
180
181 cldev->bus->fw_ver[i].platform = fwver->ver[i].platform;
182 cldev->bus->fw_ver[i].major = fwver->ver[i].major;
183 cldev->bus->fw_ver[i].minor = fwver->ver[i].minor;
184 cldev->bus->fw_ver[i].hotfix = fwver->ver[i].hotfix;
185 cldev->bus->fw_ver[i].buildno = fwver->ver[i].buildno;
186 }
187 cldev->bus->fw_ver_received = 1;
188
189 return ret;
190}
191
192#define GFX_MEMORY_READY_TIMEOUT 200 /* timeout in milliseconds */
193
194static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
195{
196 struct mkhi_gfx_mem_ready req = {0};
197 unsigned int mode = MEI_CL_IO_TX_INTERNAL | MEI_CL_IO_TX_BLOCKING;
198
199 req.hdr.group_id = MKHI_GROUP_ID_GFX;
200 req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
201 req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
202
203 dev_dbg(&cldev->dev, "Sending memory ready command\n");
204 return __mei_cl_send_timeout(cldev->cl, (u8 *)&req, sizeof(req), 0,
205 mode, GFX_MEMORY_READY_TIMEOUT);
206}
207
208static void mei_mkhi_fix(struct mei_cl_device *cldev)
209{
210 int ret;
211
212 /* No need to enable the client if nothing is needed from it */
213 if (!cldev->bus->fw_f_fw_ver_supported &&
214 !cldev->bus->hbm_f_os_supported)
215 return;
216
217 ret = mei_cldev_enable(cldev);
218 if (ret)
219 return;
220
221 if (cldev->bus->fw_f_fw_ver_supported) {
222 ret = mei_fwver(cldev);
223 if (ret < 0)
224 dev_info(&cldev->dev, "FW version command failed %d\n",
225 ret);
226 }
227
228 if (cldev->bus->hbm_f_os_supported) {
229 ret = mei_osver(cldev);
230 if (ret < 0)
231 dev_info(&cldev->dev, "OS version command failed %d\n",
232 ret);
233 }
234 mei_cldev_disable(cldev);
235}
236
237static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
238{
239 int ret;
240
241 /*
242 * No need to enable the client if nothing is needed from it.
243 * No need to fill in version if it is already filled in by the fix address client.
244 */
245 if (!cldev->bus->fw_f_fw_ver_supported || cldev->bus->fw_ver_received)
246 return;
247
248 ret = mei_cldev_enable(cldev);
249 if (ret)
250 return;
251
252 ret = mei_fwver(cldev);
253 if (ret < 0)
254 dev_info(&cldev->dev, "FW version command failed %d\n", ret);
255 mei_cldev_disable(cldev);
256}
257
258static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
259{
260 int ret;
261
262 /* No need to enable the client if nothing is needed from it */
263 if (!cldev->bus->fw_f_fw_ver_supported &&
264 cldev->bus->pxp_mode != MEI_DEV_PXP_INIT)
265 return;
266
267 ret = mei_cldev_enable(cldev);
268 if (ret)
269 return;
270
271 if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
272 ret = mei_gfx_memory_ready(cldev);
273 if (ret < 0) {
274 dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
275 } else {
276 dev_dbg(&cldev->dev, "memory ready command sent\n");
277 cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
278 }
279 /* we go to reset after that */
280 goto out;
281 }
282
283 ret = mei_fwver(cldev);
284 if (ret < 0)
285 dev_info(&cldev->dev, "FW version command failed %d\n",
286 ret);
287out:
288 mei_cldev_disable(cldev);
289}
290
291/**
292 * mei_wd - wd client on the bus, change protocol version
293 * as the API has changed.
294 *
295 * @cldev: me clients device
296 */
297#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
298#include <linux/pci.h>
299#include "hw-me-regs.h"
300static void mei_wd(struct mei_cl_device *cldev)
301{
302 struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
303
304 if (pdev->device == MEI_DEV_ID_WPT_LP ||
305 pdev->device == MEI_DEV_ID_SPT ||
306 pdev->device == MEI_DEV_ID_SPT_H)
307 cldev->me_cl->props.protocol_version = 0x2;
308
309 cldev->do_match = 1;
310}
311#else
312static inline void mei_wd(struct mei_cl_device *cldev) {}
313#endif /* CONFIG_INTEL_MEI_ME */
314
315struct mei_nfc_cmd {
316 u8 command;
317 u8 status;
318 u16 req_id;
319 u32 reserved;
320 u16 data_size;
321 u8 sub_command;
322 u8 data[];
323} __packed;
324
325struct mei_nfc_reply {
326 u8 command;
327 u8 status;
328 u16 req_id;
329 u32 reserved;
330 u16 data_size;
331 u8 sub_command;
332 u8 reply_status;
333 u8 data[];
334} __packed;
335
336struct mei_nfc_if_version {
337 u8 radio_version_sw[3];
338 u8 reserved[3];
339 u8 radio_version_hw[3];
340 u8 i2c_addr;
341 u8 fw_ivn;
342 u8 vendor_id;
343 u8 radio_type;
344} __packed;
345
346
347#define MEI_NFC_CMD_MAINTENANCE 0x00
348#define MEI_NFC_SUBCMD_IF_VERSION 0x01
349
350/* Vendors */
351#define MEI_NFC_VENDOR_INSIDE 0x00
352#define MEI_NFC_VENDOR_NXP 0x01
353
354/* Radio types */
355#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
356#define MEI_NFC_VENDOR_NXP_PN544 0x01
357
358/**
359 * mei_nfc_if_version - get NFC interface version
360 *
361 * @cl: host client (nfc info)
362 * @ver: NFC interface version to be filled in
363 *
364 * Return: 0 on success; < 0 otherwise
365 */
366static int mei_nfc_if_version(struct mei_cl *cl,
367 struct mei_nfc_if_version *ver)
368{
369 struct mei_device *bus;
370 struct mei_nfc_cmd cmd = {
371 .command = MEI_NFC_CMD_MAINTENANCE,
372 .data_size = 1,
373 .sub_command = MEI_NFC_SUBCMD_IF_VERSION,
374 };
375 struct mei_nfc_reply *reply = NULL;
376 size_t if_version_length;
377 u8 vtag;
378 int bytes_recv, ret;
379
380 bus = cl->dev;
381
382 WARN_ON(mutex_is_locked(&bus->device_lock));
383
384 ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(cmd), 0,
385 MEI_CL_IO_TX_BLOCKING);
386 if (ret < 0) {
387 dev_err(bus->dev, "Could not send IF version cmd ret = %d\n", ret);
388 return ret;
389 }
390
391 /* to be sure on the stack we alloc memory */
392 if_version_length = sizeof(*reply) + sizeof(*ver);
393
394 reply = kzalloc(if_version_length, GFP_KERNEL);
395 if (!reply)
396 return -ENOMEM;
397
398 ret = 0;
399 bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length, &vtag,
400 0, 0);
401 if (bytes_recv < 0 || (size_t)bytes_recv < if_version_length) {
402 dev_err(bus->dev, "Could not read IF version ret = %d\n", bytes_recv);
403 ret = -EIO;
404 goto err;
405 }
406
407 memcpy(ver, reply->data, sizeof(*ver));
408
409 dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
410 ver->fw_ivn, ver->vendor_id, ver->radio_type);
411
412err:
413 kfree(reply);
414 return ret;
415}
416
417/**
418 * mei_nfc_radio_name - derive nfc radio name from the interface version
419 *
420 * @ver: NFC radio version
421 *
422 * Return: radio name string
423 */
424static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
425{
426
427 if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
428 if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
429 return "microread";
430 }
431
432 if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
433 if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
434 return "pn544";
435 }
436
437 return NULL;
438}
439
440/**
441 * mei_nfc - The nfc fixup function. The function retrieves nfc radio
442 * name and set is as device attribute so we can load
443 * the proper device driver for it
444 *
445 * @cldev: me client device (nfc)
446 */
447static void mei_nfc(struct mei_cl_device *cldev)
448{
449 struct mei_device *bus;
450 struct mei_cl *cl;
451 struct mei_me_client *me_cl = NULL;
452 struct mei_nfc_if_version ver;
453 const char *radio_name = NULL;
454 int ret;
455
456 bus = cldev->bus;
457
458 mutex_lock(&bus->device_lock);
459 /* we need to connect to INFO GUID */
460 cl = mei_cl_alloc_linked(bus);
461 if (IS_ERR(cl)) {
462 ret = PTR_ERR(cl);
463 cl = NULL;
464 dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
465 goto out;
466 }
467
468 me_cl = mei_me_cl_by_uuid(bus, &mei_nfc_info_guid);
469 if (!me_cl) {
470 ret = -ENOTTY;
471 dev_err(bus->dev, "Cannot find nfc info %d\n", ret);
472 goto out;
473 }
474
475 ret = mei_cl_connect(cl, me_cl, NULL);
476 if (ret < 0) {
477 dev_err(&cldev->dev, "Can't connect to the NFC INFO ME ret = %d\n",
478 ret);
479 goto out;
480 }
481
482 mutex_unlock(&bus->device_lock);
483
484 ret = mei_nfc_if_version(cl, &ver);
485 if (ret)
486 goto disconnect;
487
488 radio_name = mei_nfc_radio_name(&ver);
489
490 if (!radio_name) {
491 ret = -ENOENT;
492 dev_err(&cldev->dev, "Can't get the NFC interface version ret = %d\n",
493 ret);
494 goto disconnect;
495 }
496
497 dev_dbg(bus->dev, "nfc radio %s\n", radio_name);
498 strscpy(cldev->name, radio_name, sizeof(cldev->name));
499
500disconnect:
501 mutex_lock(&bus->device_lock);
502 if (mei_cl_disconnect(cl) < 0)
503 dev_err(bus->dev, "Can't disconnect the NFC INFO ME\n");
504
505 mei_cl_flush_queues(cl, NULL);
506
507out:
508 mei_cl_unlink(cl);
509 mutex_unlock(&bus->device_lock);
510 mei_me_cl_put(me_cl);
511 kfree(cl);
512
513 if (ret)
514 cldev->do_match = 0;
515
516 dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
517}
518
519/**
520 * vt_support - enable on bus clients with vtag support
521 *
522 * @cldev: me clients device
523 */
524static void vt_support(struct mei_cl_device *cldev)
525{
526 if (cldev->me_cl->props.vt_supported == 1)
527 cldev->do_match = 1;
528}
529
530/**
531 * pxp_is_ready - enable bus client if pxp is ready
532 *
533 * @cldev: me clients device
534 */
535static void pxp_is_ready(struct mei_cl_device *cldev)
536{
537 struct mei_device *bus = cldev->bus;
538
539 switch (bus->pxp_mode) {
540 case MEI_DEV_PXP_READY:
541 case MEI_DEV_PXP_DEFAULT:
542 cldev->do_match = 1;
543 break;
544 default:
545 cldev->do_match = 0;
546 break;
547 }
548}
549
550#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
551
552static struct mei_fixup {
553
554 const uuid_le uuid;
555 void (*hook)(struct mei_cl_device *cldev);
556} mei_fixups[] = {
557 MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
558 MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
559 MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
560 MEI_FIXUP(MEI_UUID_WD, mei_wd),
561 MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
562 MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
563 MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
564 MEI_FIXUP(MEI_UUID_HDCP, whitelist),
565 MEI_FIXUP(MEI_UUID_ANY, vt_support),
566 MEI_FIXUP(MEI_UUID_PAVP, pxp_is_ready),
567};
568
569/**
570 * mei_cl_bus_dev_fixup - run fixup handlers
571 *
572 * @cldev: me client device
573 */
574void mei_cl_bus_dev_fixup(struct mei_cl_device *cldev)
575{
576 struct mei_fixup *f;
577 const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
578 size_t i;
579
580 for (i = 0; i < ARRAY_SIZE(mei_fixups); i++) {
581
582 f = &mei_fixups[i];
583 if (uuid_le_cmp(f->uuid, MEI_UUID_ANY) == 0 ||
584 uuid_le_cmp(f->uuid, *uuid) == 0)
585 f->hook(cldev);
586 }
587}
588