1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2021-2022, NVIDIA CORPORATION. All rights reserved
4 *
5 * The driver handles Error's from Control Backbone(CBB) version 2.0.
6 * generated due to illegal accesses. The driver prints debug information
7 * about failed transaction on receiving interrupt from Error Notifier.
8 * Error types supported by CBB2.0 are:
9 * UNSUPPORTED_ERR, PWRDOWN_ERR, TIMEOUT_ERR, FIREWALL_ERR, DECODE_ERR,
10 * SLAVE_ERR
11 */
12
13#include <linux/acpi.h>
14#include <linux/clk.h>
15#include <linux/cpufeature.h>
16#include <linux/debugfs.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/platform_device.h>
20#include <linux/device.h>
21#include <linux/io.h>
22#include <linux/interrupt.h>
23#include <linux/ioport.h>
24#include <soc/tegra/fuse.h>
25#include <soc/tegra/tegra-cbb.h>
26
27#define FABRIC_EN_CFG_INTERRUPT_ENABLE_0_0 0x0
28#define FABRIC_EN_CFG_STATUS_0_0 0x40
29#define FABRIC_EN_CFG_ADDR_INDEX_0_0 0x60
30#define FABRIC_EN_CFG_ADDR_LOW_0 0x80
31#define FABRIC_EN_CFG_ADDR_HI_0 0x84
32
33#define FABRIC_MN_MASTER_ERR_EN_0 0x200
34#define FABRIC_MN_MASTER_ERR_FORCE_0 0x204
35#define FABRIC_MN_MASTER_ERR_STATUS_0 0x208
36#define FABRIC_MN_MASTER_ERR_OVERFLOW_STATUS_0 0x20c
37
38#define FABRIC_MN_MASTER_LOG_ERR_STATUS_0 0x300
39#define FABRIC_MN_MASTER_LOG_ADDR_LOW_0 0x304
40#define FABRIC_MN_MASTER_LOG_ADDR_HIGH_0 0x308
41#define FABRIC_MN_MASTER_LOG_ATTRIBUTES0_0 0x30c
42#define FABRIC_MN_MASTER_LOG_ATTRIBUTES1_0 0x310
43#define FABRIC_MN_MASTER_LOG_ATTRIBUTES2_0 0x314
44#define FABRIC_MN_MASTER_LOG_USER_BITS0_0 0x318
45
46#define AXI_SLV_TIMEOUT_STATUS_0_0 0x8
47#define APB_BLOCK_TMO_STATUS_0 0xc00
48#define APB_BLOCK_NUM_TMO_OFFSET 0x20
49
50#define FAB_EM_EL_MSTRID GENMASK(29, 24)
51#define FAB_EM_EL_VQC GENMASK(17, 16)
52#define FAB_EM_EL_GRPSEC GENMASK(14, 8)
53#define FAB_EM_EL_FALCONSEC GENMASK(1, 0)
54
55#define FAB_EM_EL_FABID GENMASK(20, 16)
56#define FAB_EM_EL_SLAVEID GENMASK(7, 0)
57
58#define FAB_EM_EL_ACCESSID GENMASK(7, 0)
59
60#define FAB_EM_EL_AXCACHE GENMASK(27, 24)
61#define FAB_EM_EL_AXPROT GENMASK(22, 20)
62#define FAB_EM_EL_BURSTLENGTH GENMASK(19, 12)
63#define FAB_EM_EL_BURSTTYPE GENMASK(9, 8)
64#define FAB_EM_EL_BEATSIZE GENMASK(6, 4)
65#define FAB_EM_EL_ACCESSTYPE GENMASK(0, 0)
66
67#define USRBITS_MSTR_ID GENMASK(29, 24)
68
69#define REQ_SOCKET_ID GENMASK(27, 24)
70
71#define CCPLEX_MSTRID 0x1
72#define FIREWALL_APERTURE_SZ 0x10000
73/* Write firewall check enable */
74#define WEN 0x20000
75
76enum tegra234_cbb_fabric_ids {
77 CBB_FAB_ID,
78 SCE_FAB_ID,
79 RCE_FAB_ID,
80 DCE_FAB_ID,
81 AON_FAB_ID,
82 PSC_FAB_ID,
83 BPMP_FAB_ID,
84 FSI_FAB_ID,
85 MAX_FAB_ID,
86};
87
88struct tegra234_slave_lookup {
89 const char *name;
90 unsigned int offset;
91};
92
93struct tegra234_cbb_fabric {
94 const char *name;
95 phys_addr_t off_mask_erd;
96 phys_addr_t firewall_base;
97 unsigned int firewall_ctl;
98 unsigned int firewall_wr_ctl;
99 const char * const *master_id;
100 unsigned int notifier_offset;
101 const struct tegra_cbb_error *errors;
102 const int max_errors;
103 const struct tegra234_slave_lookup *slave_map;
104 const int max_slaves;
105};
106
107struct tegra234_cbb {
108 struct tegra_cbb base;
109
110 const struct tegra234_cbb_fabric *fabric;
111 struct resource *res;
112 void __iomem *regs;
113
114 int num_intr;
115 int sec_irq;
116
117 /* record */
118 void __iomem *mon;
119 unsigned int type;
120 u32 mask;
121 u64 access;
122 u32 mn_attr0;
123 u32 mn_attr1;
124 u32 mn_attr2;
125 u32 mn_user_bits;
126};
127
128static inline struct tegra234_cbb *to_tegra234_cbb(struct tegra_cbb *cbb)
129{
130 return container_of(cbb, struct tegra234_cbb, base);
131}
132
133static LIST_HEAD(cbb_list);
134static DEFINE_SPINLOCK(cbb_lock);
135
136static bool
137tegra234_cbb_write_access_allowed(struct platform_device *pdev, struct tegra234_cbb *cbb)
138{
139 u32 val;
140
141 if (!cbb->fabric->firewall_base ||
142 !cbb->fabric->firewall_ctl ||
143 !cbb->fabric->firewall_wr_ctl) {
144 dev_info(&pdev->dev, "SoC data missing for firewall\n");
145 return false;
146 }
147
148 if ((cbb->fabric->firewall_ctl > FIREWALL_APERTURE_SZ) ||
149 (cbb->fabric->firewall_wr_ctl > FIREWALL_APERTURE_SZ)) {
150 dev_err(&pdev->dev, "wrong firewall offset value\n");
151 return false;
152 }
153
154 val = readl(addr: cbb->regs + cbb->fabric->firewall_base + cbb->fabric->firewall_ctl);
155 /*
156 * If the firewall check feature for allowing or blocking the
157 * write accesses through the firewall of a fabric is disabled
158 * then CCPLEX can write to the registers of that fabric.
159 */
160 if (!(val & WEN))
161 return true;
162
163 /*
164 * If the firewall check is enabled then check whether CCPLEX
165 * has write access to the fabric's error notifier registers
166 */
167 val = readl(addr: cbb->regs + cbb->fabric->firewall_base + cbb->fabric->firewall_wr_ctl);
168 if (val & (BIT(CCPLEX_MSTRID)))
169 return true;
170
171 return false;
172}
173
174static void tegra234_cbb_fault_enable(struct tegra_cbb *cbb)
175{
176 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
177 void __iomem *addr;
178
179 addr = priv->regs + priv->fabric->notifier_offset;
180 writel(val: 0x1ff, addr: addr + FABRIC_EN_CFG_INTERRUPT_ENABLE_0_0);
181 dsb(sy);
182}
183
184static void tegra234_cbb_error_clear(struct tegra_cbb *cbb)
185{
186 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
187
188 writel(val: 0x3f, addr: priv->mon + FABRIC_MN_MASTER_ERR_STATUS_0);
189 dsb(sy);
190}
191
192static u32 tegra234_cbb_get_status(struct tegra_cbb *cbb)
193{
194 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
195 void __iomem *addr;
196 u32 value;
197
198 addr = priv->regs + priv->fabric->notifier_offset;
199 value = readl(addr: addr + FABRIC_EN_CFG_STATUS_0_0);
200 dsb(sy);
201
202 return value;
203}
204
205static void tegra234_cbb_mask_serror(struct tegra234_cbb *cbb)
206{
207 writel(val: 0x1, addr: cbb->regs + cbb->fabric->off_mask_erd);
208 dsb(sy);
209}
210
211static u32 tegra234_cbb_get_tmo_slv(void __iomem *addr)
212{
213 u32 timeout;
214
215 timeout = readl(addr);
216 return timeout;
217}
218
219static void tegra234_cbb_tmo_slv(struct seq_file *file, const char *slave, void __iomem *addr,
220 u32 status)
221{
222 tegra_cbb_print_err(file, fmt: "\t %s : %#x\n", slave, status);
223}
224
225static void tegra234_cbb_lookup_apbslv(struct seq_file *file, const char *slave,
226 void __iomem *base)
227{
228 unsigned int block = 0;
229 void __iomem *addr;
230 char name[64];
231 u32 status;
232
233 status = tegra234_cbb_get_tmo_slv(addr: base);
234 if (status)
235 tegra_cbb_print_err(file, fmt: "\t %s_BLOCK_TMO_STATUS : %#x\n", slave, status);
236
237 while (status) {
238 if (status & BIT(0)) {
239 u32 timeout, clients, client = 0;
240
241 addr = base + APB_BLOCK_NUM_TMO_OFFSET + (block * 4);
242 timeout = tegra234_cbb_get_tmo_slv(addr);
243 clients = timeout;
244
245 while (timeout) {
246 if (timeout & BIT(0)) {
247 if (clients != 0xffffffff)
248 clients &= BIT(client);
249
250 sprintf(buf: name, fmt: "%s_BLOCK%d_TMO", slave, block);
251
252 tegra234_cbb_tmo_slv(file, slave: name, addr, status: clients);
253 }
254
255 timeout >>= 1;
256 client++;
257 }
258 }
259
260 status >>= 1;
261 block++;
262 }
263}
264
265static void tegra234_lookup_slave_timeout(struct seq_file *file, struct tegra234_cbb *cbb,
266 u8 slave_id, u8 fab_id)
267{
268 const struct tegra234_slave_lookup *map = cbb->fabric->slave_map;
269 void __iomem *addr;
270
271 /*
272 * 1) Get slave node name and address mapping using slave_id.
273 * 2) Check if the timed out slave node is APB or AXI.
274 * 3) If AXI, then print timeout register and reset axi slave
275 * using <FABRIC>_SN_<>_SLV_TIMEOUT_STATUS_0_0 register.
276 * 4) If APB, then perform an additional lookup to find the client
277 * which timed out.
278 * a) Get block number from the index of set bit in
279 * <FABRIC>_SN_AXI2APB_<>_BLOCK_TMO_STATUS_0 register.
280 * b) Get address of register respective to block number i.e.
281 * <FABRIC>_SN_AXI2APB_<>_BLOCK<index-set-bit>_TMO_0.
282 * c) Read the register in above step to get client_id which
283 * timed out as per the set bits.
284 * d) Reset the timedout client and print details.
285 * e) Goto step-a till all bits are set.
286 */
287
288 addr = cbb->regs + map[slave_id].offset;
289
290 if (strstr(map[slave_id].name, "AXI2APB")) {
291 addr += APB_BLOCK_TMO_STATUS_0;
292
293 tegra234_cbb_lookup_apbslv(file, slave: map[slave_id].name, base: addr);
294 } else {
295 char name[64];
296 u32 status;
297
298 addr += AXI_SLV_TIMEOUT_STATUS_0_0;
299
300 status = tegra234_cbb_get_tmo_slv(addr);
301 if (status) {
302 sprintf(buf: name, fmt: "%s_SLV_TIMEOUT_STATUS", map[slave_id].name);
303 tegra234_cbb_tmo_slv(file, slave: name, addr, status);
304 }
305 }
306}
307
308static void tegra234_cbb_print_error(struct seq_file *file, struct tegra234_cbb *cbb, u32 status,
309 u32 overflow)
310{
311 unsigned int type = 0;
312
313 if (status & (status - 1))
314 tegra_cbb_print_err(file, fmt: "\t Multiple type of errors reported\n");
315
316 while (status) {
317 if (type >= cbb->fabric->max_errors) {
318 tegra_cbb_print_err(file, fmt: "\t Wrong type index:%u, status:%u\n",
319 type, status);
320 return;
321 }
322
323 if (status & 0x1)
324 tegra_cbb_print_err(file, fmt: "\t Error Code\t\t: %s\n",
325 cbb->fabric->errors[type].code);
326
327 status >>= 1;
328 type++;
329 }
330
331 type = 0;
332
333 while (overflow) {
334 if (type >= cbb->fabric->max_errors) {
335 tegra_cbb_print_err(file, fmt: "\t Wrong type index:%u, overflow:%u\n",
336 type, overflow);
337 return;
338 }
339
340 if (overflow & 0x1)
341 tegra_cbb_print_err(file, fmt: "\t Overflow\t\t: Multiple %s\n",
342 cbb->fabric->errors[type].code);
343
344 overflow >>= 1;
345 type++;
346 }
347}
348
349static void print_errlog_err(struct seq_file *file, struct tegra234_cbb *cbb)
350{
351 u8 cache_type, prot_type, burst_length, mstr_id, grpsec, vqc, falconsec, beat_size;
352 u8 access_type, access_id, requester_socket_id, local_socket_id, slave_id, fab_id;
353 char fabric_name[20];
354 bool is_numa = false;
355 u8 burst_type;
356
357 if (num_possible_nodes() > 1)
358 is_numa = true;
359
360 mstr_id = FIELD_GET(FAB_EM_EL_MSTRID, cbb->mn_user_bits);
361 vqc = FIELD_GET(FAB_EM_EL_VQC, cbb->mn_user_bits);
362 grpsec = FIELD_GET(FAB_EM_EL_GRPSEC, cbb->mn_user_bits);
363 falconsec = FIELD_GET(FAB_EM_EL_FALCONSEC, cbb->mn_user_bits);
364
365 /*
366 * For SOC with multiple NUMA nodes, print cross socket access
367 * errors only if initiator/master_id is CCPLEX, CPMU or GPU.
368 */
369 if (is_numa) {
370 local_socket_id = numa_node_id();
371 requester_socket_id = FIELD_GET(REQ_SOCKET_ID, cbb->mn_attr2);
372
373 if (requester_socket_id != local_socket_id) {
374 if ((mstr_id != 0x1) && (mstr_id != 0x2) && (mstr_id != 0xB))
375 return;
376 }
377 }
378
379 fab_id = FIELD_GET(FAB_EM_EL_FABID, cbb->mn_attr2);
380 slave_id = FIELD_GET(FAB_EM_EL_SLAVEID, cbb->mn_attr2);
381
382 access_id = FIELD_GET(FAB_EM_EL_ACCESSID, cbb->mn_attr1);
383
384 cache_type = FIELD_GET(FAB_EM_EL_AXCACHE, cbb->mn_attr0);
385 prot_type = FIELD_GET(FAB_EM_EL_AXPROT, cbb->mn_attr0);
386 burst_length = FIELD_GET(FAB_EM_EL_BURSTLENGTH, cbb->mn_attr0);
387 burst_type = FIELD_GET(FAB_EM_EL_BURSTTYPE, cbb->mn_attr0);
388 beat_size = FIELD_GET(FAB_EM_EL_BEATSIZE, cbb->mn_attr0);
389 access_type = FIELD_GET(FAB_EM_EL_ACCESSTYPE, cbb->mn_attr0);
390
391 tegra_cbb_print_err(file, fmt: "\n");
392 if (cbb->type < cbb->fabric->max_errors)
393 tegra_cbb_print_err(file, fmt: "\t Error Code\t\t: %s\n",
394 cbb->fabric->errors[cbb->type].code);
395 else
396 tegra_cbb_print_err(file, fmt: "\t Wrong type index:%u\n", cbb->type);
397
398 tegra_cbb_print_err(file, fmt: "\t MASTER_ID\t\t: %s\n", cbb->fabric->master_id[mstr_id]);
399 tegra_cbb_print_err(file, fmt: "\t Address\t\t: %#llx\n", cbb->access);
400
401 tegra_cbb_print_cache(file, cache: cache_type);
402 tegra_cbb_print_prot(file, prot: prot_type);
403
404 tegra_cbb_print_err(file, fmt: "\t Access_Type\t\t: %s", (access_type) ? "Write\n" : "Read\n");
405 tegra_cbb_print_err(file, fmt: "\t Access_ID\t\t: %#x", access_id);
406
407 if (fab_id == PSC_FAB_ID)
408 strcpy(p: fabric_name, q: "psc-fabric");
409 else if (fab_id == FSI_FAB_ID)
410 strcpy(p: fabric_name, q: "fsi-fabric");
411 else
412 strcpy(p: fabric_name, q: cbb->fabric->name);
413
414 if (is_numa) {
415 tegra_cbb_print_err(file, fmt: "\t Requester_Socket_Id\t: %#x\n",
416 requester_socket_id);
417 tegra_cbb_print_err(file, fmt: "\t Local_Socket_Id\t: %#x\n",
418 local_socket_id);
419 tegra_cbb_print_err(file, fmt: "\t No. of NUMA_NODES\t: %#x\n",
420 num_possible_nodes());
421 }
422
423 tegra_cbb_print_err(file, fmt: "\t Fabric\t\t: %s\n", fabric_name);
424 tegra_cbb_print_err(file, fmt: "\t Slave_Id\t\t: %#x\n", slave_id);
425 tegra_cbb_print_err(file, fmt: "\t Burst_length\t\t: %#x\n", burst_length);
426 tegra_cbb_print_err(file, fmt: "\t Burst_type\t\t: %#x\n", burst_type);
427 tegra_cbb_print_err(file, fmt: "\t Beat_size\t\t: %#x\n", beat_size);
428 tegra_cbb_print_err(file, fmt: "\t VQC\t\t\t: %#x\n", vqc);
429 tegra_cbb_print_err(file, fmt: "\t GRPSEC\t\t: %#x\n", grpsec);
430 tegra_cbb_print_err(file, fmt: "\t FALCONSEC\t\t: %#x\n", falconsec);
431
432 if ((fab_id == PSC_FAB_ID) || (fab_id == FSI_FAB_ID))
433 return;
434
435 if (slave_id >= cbb->fabric->max_slaves) {
436 tegra_cbb_print_err(file, fmt: "\t Invalid slave_id:%d\n", slave_id);
437 return;
438 }
439
440 if (!strcmp(cbb->fabric->errors[cbb->type].code, "TIMEOUT_ERR")) {
441 tegra234_lookup_slave_timeout(file, cbb, slave_id, fab_id);
442 return;
443 }
444
445 tegra_cbb_print_err(file, fmt: "\t Slave\t\t\t: %s\n", cbb->fabric->slave_map[slave_id].name);
446}
447
448static int print_errmonX_info(struct seq_file *file, struct tegra234_cbb *cbb)
449{
450 u32 overflow, status, error;
451
452 status = readl(addr: cbb->mon + FABRIC_MN_MASTER_ERR_STATUS_0);
453 if (!status) {
454 pr_err("Error Notifier received a spurious notification\n");
455 return -ENODATA;
456 }
457
458 if (status == 0xffffffff) {
459 pr_err("CBB registers returning all 1's which is invalid\n");
460 return -EINVAL;
461 }
462
463 overflow = readl(addr: cbb->mon + FABRIC_MN_MASTER_ERR_OVERFLOW_STATUS_0);
464
465 tegra234_cbb_print_error(file, cbb, status, overflow);
466
467 error = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ERR_STATUS_0);
468 if (!error) {
469 pr_info("Error Monitor doesn't have Error Logger\n");
470 return -EINVAL;
471 }
472
473 cbb->type = 0;
474
475 while (error) {
476 if (error & BIT(0)) {
477 u32 hi, lo;
478
479 hi = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ADDR_HIGH_0);
480 lo = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ADDR_LOW_0);
481
482 cbb->access = (u64)hi << 32 | lo;
483
484 cbb->mn_attr0 = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ATTRIBUTES0_0);
485 cbb->mn_attr1 = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ATTRIBUTES1_0);
486 cbb->mn_attr2 = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_ATTRIBUTES2_0);
487 cbb->mn_user_bits = readl(addr: cbb->mon + FABRIC_MN_MASTER_LOG_USER_BITS0_0);
488
489 print_errlog_err(file, cbb);
490 }
491
492 cbb->type++;
493 error >>= 1;
494 }
495
496 return 0;
497}
498
499static int print_err_notifier(struct seq_file *file, struct tegra234_cbb *cbb, u32 status)
500{
501 unsigned int index = 0;
502 int err;
503
504 pr_crit("**************************************\n");
505 pr_crit("CPU:%d, Error:%s, Errmon:%d\n", smp_processor_id(),
506 cbb->fabric->name, status);
507
508 while (status) {
509 if (status & BIT(0)) {
510 unsigned int notifier = cbb->fabric->notifier_offset;
511 u32 hi, lo, mask = BIT(index);
512 phys_addr_t addr;
513 u64 offset;
514
515 writel(val: mask, addr: cbb->regs + notifier + FABRIC_EN_CFG_ADDR_INDEX_0_0);
516 hi = readl(addr: cbb->regs + notifier + FABRIC_EN_CFG_ADDR_HI_0);
517 lo = readl(addr: cbb->regs + notifier + FABRIC_EN_CFG_ADDR_LOW_0);
518
519 addr = (u64)hi << 32 | lo;
520
521 offset = addr - cbb->res->start;
522 cbb->mon = cbb->regs + offset;
523 cbb->mask = BIT(index);
524
525 err = print_errmonX_info(file, cbb);
526 tegra234_cbb_error_clear(cbb: &cbb->base);
527 if (err)
528 return err;
529 }
530
531 status >>= 1;
532 index++;
533 }
534
535 tegra_cbb_print_err(file, fmt: "\t**************************************\n");
536 return 0;
537}
538
539#ifdef CONFIG_DEBUG_FS
540static DEFINE_MUTEX(cbb_debugfs_mutex);
541
542static int tegra234_cbb_debugfs_show(struct tegra_cbb *cbb, struct seq_file *file, void *data)
543{
544 int err = 0;
545
546 mutex_lock(&cbb_debugfs_mutex);
547
548 list_for_each_entry(cbb, &cbb_list, node) {
549 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
550 u32 status;
551
552 status = tegra_cbb_get_status(cbb: &priv->base);
553 if (status) {
554 err = print_err_notifier(file, cbb: priv, status);
555 if (err)
556 break;
557 }
558 }
559
560 mutex_unlock(lock: &cbb_debugfs_mutex);
561 return err;
562}
563#endif
564
565/*
566 * Handler for CBB errors
567 */
568static irqreturn_t tegra234_cbb_isr(int irq, void *data)
569{
570 bool is_inband_err = false;
571 struct tegra_cbb *cbb;
572 unsigned long flags;
573 u8 mstr_id;
574 int err;
575
576 spin_lock_irqsave(&cbb_lock, flags);
577
578 list_for_each_entry(cbb, &cbb_list, node) {
579 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
580 u32 status = tegra_cbb_get_status(cbb);
581
582 if (status && (irq == priv->sec_irq)) {
583 tegra_cbb_print_err(NULL, fmt: "CPU:%d, Error: %s@0x%llx, irq=%d\n",
584 smp_processor_id(), priv->fabric->name,
585 priv->res->start, irq);
586
587 err = print_err_notifier(NULL, cbb: priv, status);
588 if (err)
589 goto unlock;
590
591 /*
592 * If illegal request is from CCPLEX(id:0x1) master then call WARN()
593 */
594 if (priv->fabric->off_mask_erd) {
595 mstr_id = FIELD_GET(USRBITS_MSTR_ID, priv->mn_user_bits);
596 if (mstr_id == CCPLEX_MSTRID)
597 is_inband_err = 1;
598 }
599 }
600 }
601
602unlock:
603 spin_unlock_irqrestore(lock: &cbb_lock, flags);
604 WARN_ON(is_inband_err);
605 return IRQ_HANDLED;
606}
607
608/*
609 * Register handler for CBB_SECURE interrupt for reporting errors
610 */
611static int tegra234_cbb_interrupt_enable(struct tegra_cbb *cbb)
612{
613 struct tegra234_cbb *priv = to_tegra234_cbb(cbb);
614
615 if (priv->sec_irq) {
616 int err = devm_request_irq(dev: cbb->dev, irq: priv->sec_irq, handler: tegra234_cbb_isr, irqflags: 0,
617 devname: dev_name(dev: cbb->dev), dev_id: priv);
618 if (err) {
619 dev_err(cbb->dev, "failed to register interrupt %u: %d\n", priv->sec_irq,
620 err);
621 return err;
622 }
623 }
624
625 return 0;
626}
627
628static void tegra234_cbb_error_enable(struct tegra_cbb *cbb)
629{
630 tegra_cbb_fault_enable(cbb);
631}
632
633static const struct tegra_cbb_ops tegra234_cbb_ops = {
634 .get_status = tegra234_cbb_get_status,
635 .error_clear = tegra234_cbb_error_clear,
636 .fault_enable = tegra234_cbb_fault_enable,
637 .error_enable = tegra234_cbb_error_enable,
638 .interrupt_enable = tegra234_cbb_interrupt_enable,
639#ifdef CONFIG_DEBUG_FS
640 .debugfs_show = tegra234_cbb_debugfs_show,
641#endif
642};
643
644static const char * const tegra234_master_id[] = {
645 [0x00] = "TZ",
646 [0x01] = "CCPLEX",
647 [0x02] = "CCPMU",
648 [0x03] = "BPMP_FW",
649 [0x04] = "AON",
650 [0x05] = "SCE",
651 [0x06] = "GPCDMA_P",
652 [0x07] = "TSECA_NONSECURE",
653 [0x08] = "TSECA_LIGHTSECURE",
654 [0x09] = "TSECA_HEAVYSECURE",
655 [0x0a] = "CORESIGHT",
656 [0x0b] = "APE",
657 [0x0c] = "PEATRANS",
658 [0x0d] = "JTAGM_DFT",
659 [0x0e] = "RCE",
660 [0x0f] = "DCE",
661 [0x10] = "PSC_FW_USER",
662 [0x11] = "PSC_FW_SUPERVISOR",
663 [0x12] = "PSC_FW_MACHINE",
664 [0x13] = "PSC_BOOT",
665 [0x14] = "BPMP_BOOT",
666 [0x15] = "NVDEC_NONSECURE",
667 [0x16] = "NVDEC_LIGHTSECURE",
668 [0x17] = "NVDEC_HEAVYSECURE",
669 [0x18] = "CBB_INTERNAL",
670 [0x19] = "RSVD"
671};
672
673static const struct tegra_cbb_error tegra234_cbb_errors[] = {
674 {
675 .code = "SLAVE_ERR",
676 .desc = "Slave being accessed responded with an error"
677 }, {
678 .code = "DECODE_ERR",
679 .desc = "Attempt to access an address hole"
680 }, {
681 .code = "FIREWALL_ERR",
682 .desc = "Attempt to access a region which is firewall protected"
683 }, {
684 .code = "TIMEOUT_ERR",
685 .desc = "No response returned by slave"
686 }, {
687 .code = "PWRDOWN_ERR",
688 .desc = "Attempt to access a portion of fabric that is powered down"
689 }, {
690 .code = "UNSUPPORTED_ERR",
691 .desc = "Attempt to access a slave through an unsupported access"
692 }
693};
694
695static const struct tegra234_slave_lookup tegra234_aon_slave_map[] = {
696 { "AXI2APB", 0x00000 },
697 { "AST", 0x14000 },
698 { "CBB", 0x15000 },
699 { "CPU", 0x16000 },
700};
701
702static const struct tegra234_cbb_fabric tegra234_aon_fabric = {
703 .name = "aon-fabric",
704 .master_id = tegra234_master_id,
705 .slave_map = tegra234_aon_slave_map,
706 .max_slaves = ARRAY_SIZE(tegra234_aon_slave_map),
707 .errors = tegra234_cbb_errors,
708 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
709 .notifier_offset = 0x17000,
710 .firewall_base = 0x30000,
711 .firewall_ctl = 0x8d0,
712 .firewall_wr_ctl = 0x8c8,
713};
714
715static const struct tegra234_slave_lookup tegra234_bpmp_slave_map[] = {
716 { "AXI2APB", 0x00000 },
717 { "AST0", 0x15000 },
718 { "AST1", 0x16000 },
719 { "CBB", 0x17000 },
720 { "CPU", 0x18000 },
721};
722
723static const struct tegra234_cbb_fabric tegra234_bpmp_fabric = {
724 .name = "bpmp-fabric",
725 .master_id = tegra234_master_id,
726 .slave_map = tegra234_bpmp_slave_map,
727 .max_slaves = ARRAY_SIZE(tegra234_bpmp_slave_map),
728 .errors = tegra234_cbb_errors,
729 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
730 .notifier_offset = 0x19000,
731 .firewall_base = 0x30000,
732 .firewall_ctl = 0x8f0,
733 .firewall_wr_ctl = 0x8e8,
734};
735
736static const struct tegra234_slave_lookup tegra234_cbb_slave_map[] = {
737 { "AON", 0x40000 },
738 { "BPMP", 0x41000 },
739 { "CBB", 0x42000 },
740 { "HOST1X", 0x43000 },
741 { "STM", 0x44000 },
742 { "FSI", 0x45000 },
743 { "PSC", 0x46000 },
744 { "PCIE_C1", 0x47000 },
745 { "PCIE_C2", 0x48000 },
746 { "PCIE_C3", 0x49000 },
747 { "PCIE_C0", 0x4a000 },
748 { "PCIE_C4", 0x4b000 },
749 { "GPU", 0x4c000 },
750 { "SMMU0", 0x4d000 },
751 { "SMMU1", 0x4e000 },
752 { "SMMU2", 0x4f000 },
753 { "SMMU3", 0x50000 },
754 { "SMMU4", 0x51000 },
755 { "PCIE_C10", 0x52000 },
756 { "PCIE_C7", 0x53000 },
757 { "PCIE_C8", 0x54000 },
758 { "PCIE_C9", 0x55000 },
759 { "PCIE_C5", 0x56000 },
760 { "PCIE_C6", 0x57000 },
761 { "DCE", 0x58000 },
762 { "RCE", 0x59000 },
763 { "SCE", 0x5a000 },
764 { "AXI2APB_1", 0x70000 },
765 { "AXI2APB_10", 0x71000 },
766 { "AXI2APB_11", 0x72000 },
767 { "AXI2APB_12", 0x73000 },
768 { "AXI2APB_13", 0x74000 },
769 { "AXI2APB_14", 0x75000 },
770 { "AXI2APB_15", 0x76000 },
771 { "AXI2APB_16", 0x77000 },
772 { "AXI2APB_17", 0x78000 },
773 { "AXI2APB_18", 0x79000 },
774 { "AXI2APB_19", 0x7a000 },
775 { "AXI2APB_2", 0x7b000 },
776 { "AXI2APB_20", 0x7c000 },
777 { "AXI2APB_21", 0x7d000 },
778 { "AXI2APB_22", 0x7e000 },
779 { "AXI2APB_23", 0x7f000 },
780 { "AXI2APB_25", 0x80000 },
781 { "AXI2APB_26", 0x81000 },
782 { "AXI2APB_27", 0x82000 },
783 { "AXI2APB_28", 0x83000 },
784 { "AXI2APB_29", 0x84000 },
785 { "AXI2APB_30", 0x85000 },
786 { "AXI2APB_31", 0x86000 },
787 { "AXI2APB_32", 0x87000 },
788 { "AXI2APB_33", 0x88000 },
789 { "AXI2APB_34", 0x89000 },
790 { "AXI2APB_35", 0x92000 },
791 { "AXI2APB_4", 0x8b000 },
792 { "AXI2APB_5", 0x8c000 },
793 { "AXI2APB_6", 0x8d000 },
794 { "AXI2APB_7", 0x8e000 },
795 { "AXI2APB_8", 0x8f000 },
796 { "AXI2APB_9", 0x90000 },
797 { "AXI2APB_3", 0x91000 },
798};
799
800static const struct tegra234_cbb_fabric tegra234_cbb_fabric = {
801 .name = "cbb-fabric",
802 .master_id = tegra234_master_id,
803 .slave_map = tegra234_cbb_slave_map,
804 .max_slaves = ARRAY_SIZE(tegra234_cbb_slave_map),
805 .errors = tegra234_cbb_errors,
806 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
807 .notifier_offset = 0x60000,
808 .off_mask_erd = 0x3a004,
809 .firewall_base = 0x10000,
810 .firewall_ctl = 0x23f0,
811 .firewall_wr_ctl = 0x23e8,
812};
813
814static const struct tegra234_slave_lookup tegra234_common_slave_map[] = {
815 { "AXI2APB", 0x00000 },
816 { "AST0", 0x15000 },
817 { "AST1", 0x16000 },
818 { "CBB", 0x17000 },
819 { "RSVD", 0x00000 },
820 { "CPU", 0x18000 },
821};
822
823static const struct tegra234_cbb_fabric tegra234_dce_fabric = {
824 .name = "dce-fabric",
825 .master_id = tegra234_master_id,
826 .slave_map = tegra234_common_slave_map,
827 .max_slaves = ARRAY_SIZE(tegra234_common_slave_map),
828 .errors = tegra234_cbb_errors,
829 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
830 .notifier_offset = 0x19000,
831 .firewall_base = 0x30000,
832 .firewall_ctl = 0x290,
833 .firewall_wr_ctl = 0x288,
834};
835
836static const struct tegra234_cbb_fabric tegra234_rce_fabric = {
837 .name = "rce-fabric",
838 .master_id = tegra234_master_id,
839 .slave_map = tegra234_common_slave_map,
840 .max_slaves = ARRAY_SIZE(tegra234_common_slave_map),
841 .errors = tegra234_cbb_errors,
842 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
843 .notifier_offset = 0x19000,
844 .firewall_base = 0x30000,
845 .firewall_ctl = 0x290,
846 .firewall_wr_ctl = 0x288,
847};
848
849static const struct tegra234_cbb_fabric tegra234_sce_fabric = {
850 .name = "sce-fabric",
851 .master_id = tegra234_master_id,
852 .slave_map = tegra234_common_slave_map,
853 .max_slaves = ARRAY_SIZE(tegra234_common_slave_map),
854 .errors = tegra234_cbb_errors,
855 .max_errors = ARRAY_SIZE(tegra234_cbb_errors),
856 .notifier_offset = 0x19000,
857 .firewall_base = 0x30000,
858 .firewall_ctl = 0x290,
859 .firewall_wr_ctl = 0x288,
860};
861
862static const char * const tegra241_master_id[] = {
863 [0x0] = "TZ",
864 [0x1] = "CCPLEX",
865 [0x2] = "CCPMU",
866 [0x3] = "BPMP_FW",
867 [0x4] = "PSC_FW_USER",
868 [0x5] = "PSC_FW_SUPERVISOR",
869 [0x6] = "PSC_FW_MACHINE",
870 [0x7] = "PSC_BOOT",
871 [0x8] = "BPMP_BOOT",
872 [0x9] = "JTAGM_DFT",
873 [0xa] = "CORESIGHT",
874 [0xb] = "GPU",
875 [0xc] = "PEATRANS",
876 [0xd ... 0x3f] = "RSVD"
877};
878
879/*
880 * Possible causes for Slave and Timeout errors.
881 * SLAVE_ERR:
882 * Slave being accessed responded with an error. Slave could return
883 * an error for various cases :
884 * Unsupported access, clamp setting when power gated, register
885 * level firewall(SCR), address hole within the slave, etc
886 *
887 * TIMEOUT_ERR:
888 * No response returned by slave. Can be due to slave being clock
889 * gated, under reset, powered down or slave inability to respond
890 * for an internal slave issue
891 */
892static const struct tegra_cbb_error tegra241_cbb_errors[] = {
893 {
894 .code = "SLAVE_ERR",
895 .desc = "Slave being accessed responded with an error."
896 }, {
897 .code = "DECODE_ERR",
898 .desc = "Attempt to access an address hole or Reserved region of memory."
899 }, {
900 .code = "FIREWALL_ERR",
901 .desc = "Attempt to access a region which is firewalled."
902 }, {
903 .code = "TIMEOUT_ERR",
904 .desc = "No response returned by slave."
905 }, {
906 .code = "PWRDOWN_ERR",
907 .desc = "Attempt to access a portion of the fabric that is powered down."
908 }, {
909 .code = "UNSUPPORTED_ERR",
910 .desc = "Attempt to access a slave through an unsupported access."
911 }, {
912 .code = "POISON_ERR",
913 .desc = "Slave responds with poison error to indicate error in data."
914 }, {
915 .code = "RSVD"
916 }, {
917 .code = "RSVD"
918 }, {
919 .code = "RSVD"
920 }, {
921 .code = "RSVD"
922 }, {
923 .code = "RSVD"
924 }, {
925 .code = "RSVD"
926 }, {
927 .code = "RSVD"
928 }, {
929 .code = "RSVD"
930 }, {
931 .code = "RSVD"
932 }, {
933 .code = "NO_SUCH_ADDRESS_ERR",
934 .desc = "The address belongs to the pri_target range but there is no register "
935 "implemented at the address."
936 }, {
937 .code = "TASK_ERR",
938 .desc = "Attempt to update a PRI task when the current task has still not "
939 "completed."
940 }, {
941 .code = "EXTERNAL_ERR",
942 .desc = "Indicates that an external PRI register access met with an error due to "
943 "any issue in the unit."
944 }, {
945 .code = "INDEX_ERR",
946 .desc = "Applicable to PRI index aperture pair, when the programmed index is "
947 "outside the range defined in the manual."
948 }, {
949 .code = "RESET_ERR",
950 .desc = "Target in Reset Error: Attempt to access a SubPri or external PRI "
951 "register but they are in reset."
952 }, {
953 .code = "REGISTER_RST_ERR",
954 .desc = "Attempt to access a PRI register but the register is partial or "
955 "completely in reset."
956 }, {
957 .code = "POWER_GATED_ERR",
958 .desc = "Returned by external PRI client when the external access goes to a power "
959 "gated domain."
960 }, {
961 .code = "SUBPRI_FS_ERR",
962 .desc = "Subpri is floorswept: Attempt to access a subpri through the main pri "
963 "target but subPri logic is floorswept."
964 }, {
965 .code = "SUBPRI_CLK_OFF_ERR",
966 .desc = "Subpri clock is off: Attempt to access a subpri through the main pri "
967 "target but subPris clock is gated/off."
968 },
969};
970
971static const struct tegra234_slave_lookup tegra241_cbb_slave_map[] = {
972 { "RSVD", 0x00000 },
973 { "PCIE_C8", 0x51000 },
974 { "PCIE_C9", 0x52000 },
975 { "RSVD", 0x00000 },
976 { "RSVD", 0x00000 },
977 { "RSVD", 0x00000 },
978 { "RSVD", 0x00000 },
979 { "RSVD", 0x00000 },
980 { "RSVD", 0x00000 },
981 { "RSVD", 0x00000 },
982 { "RSVD", 0x00000 },
983 { "AON", 0x5b000 },
984 { "BPMP", 0x5c000 },
985 { "RSVD", 0x00000 },
986 { "RSVD", 0x00000 },
987 { "PSC", 0x5d000 },
988 { "STM", 0x5e000 },
989 { "AXI2APB_1", 0x70000 },
990 { "AXI2APB_10", 0x71000 },
991 { "AXI2APB_11", 0x72000 },
992 { "AXI2APB_12", 0x73000 },
993 { "AXI2APB_13", 0x74000 },
994 { "AXI2APB_14", 0x75000 },
995 { "AXI2APB_15", 0x76000 },
996 { "AXI2APB_16", 0x77000 },
997 { "AXI2APB_17", 0x78000 },
998 { "AXI2APB_18", 0x79000 },
999 { "AXI2APB_19", 0x7a000 },
1000 { "AXI2APB_2", 0x7b000 },
1001 { "AXI2APB_20", 0x7c000 },
1002 { "AXI2APB_4", 0x87000 },
1003 { "AXI2APB_5", 0x88000 },
1004 { "AXI2APB_6", 0x89000 },
1005 { "AXI2APB_7", 0x8a000 },
1006 { "AXI2APB_8", 0x8b000 },
1007 { "AXI2APB_9", 0x8c000 },
1008 { "AXI2APB_3", 0x8d000 },
1009 { "AXI2APB_21", 0x7d000 },
1010 { "AXI2APB_22", 0x7e000 },
1011 { "AXI2APB_23", 0x7f000 },
1012 { "AXI2APB_24", 0x80000 },
1013 { "AXI2APB_25", 0x81000 },
1014 { "AXI2APB_26", 0x82000 },
1015 { "AXI2APB_27", 0x83000 },
1016 { "AXI2APB_28", 0x84000 },
1017 { "PCIE_C4", 0x53000 },
1018 { "PCIE_C5", 0x54000 },
1019 { "PCIE_C6", 0x55000 },
1020 { "PCIE_C7", 0x56000 },
1021 { "PCIE_C2", 0x57000 },
1022 { "PCIE_C3", 0x58000 },
1023 { "PCIE_C0", 0x59000 },
1024 { "PCIE_C1", 0x5a000 },
1025 { "CCPLEX", 0x50000 },
1026 { "AXI2APB_29", 0x85000 },
1027 { "AXI2APB_30", 0x86000 },
1028 { "CBB_CENTRAL", 0x00000 },
1029 { "AXI2APB_31", 0x8E000 },
1030 { "AXI2APB_32", 0x8F000 },
1031};
1032
1033static const struct tegra234_cbb_fabric tegra241_cbb_fabric = {
1034 .name = "cbb-fabric",
1035 .master_id = tegra241_master_id,
1036 .slave_map = tegra241_cbb_slave_map,
1037 .max_slaves = ARRAY_SIZE(tegra241_cbb_slave_map),
1038 .errors = tegra241_cbb_errors,
1039 .max_errors = ARRAY_SIZE(tegra241_cbb_errors),
1040 .notifier_offset = 0x60000,
1041 .off_mask_erd = 0x40004,
1042 .firewall_base = 0x20000,
1043 .firewall_ctl = 0x2370,
1044 .firewall_wr_ctl = 0x2368,
1045};
1046
1047static const struct tegra234_slave_lookup tegra241_bpmp_slave_map[] = {
1048 { "RSVD", 0x00000 },
1049 { "RSVD", 0x00000 },
1050 { "RSVD", 0x00000 },
1051 { "CBB", 0x15000 },
1052 { "CPU", 0x16000 },
1053 { "AXI2APB", 0x00000 },
1054 { "DBB0", 0x17000 },
1055 { "DBB1", 0x18000 },
1056};
1057
1058static const struct tegra234_cbb_fabric tegra241_bpmp_fabric = {
1059 .name = "bpmp-fabric",
1060 .master_id = tegra241_master_id,
1061 .slave_map = tegra241_bpmp_slave_map,
1062 .max_slaves = ARRAY_SIZE(tegra241_bpmp_slave_map),
1063 .errors = tegra241_cbb_errors,
1064 .max_errors = ARRAY_SIZE(tegra241_cbb_errors),
1065 .notifier_offset = 0x19000,
1066 .firewall_base = 0x30000,
1067 .firewall_ctl = 0x8f0,
1068 .firewall_wr_ctl = 0x8e8,
1069};
1070
1071static const struct of_device_id tegra234_cbb_dt_ids[] = {
1072 { .compatible = "nvidia,tegra234-cbb-fabric", .data = &tegra234_cbb_fabric },
1073 { .compatible = "nvidia,tegra234-aon-fabric", .data = &tegra234_aon_fabric },
1074 { .compatible = "nvidia,tegra234-bpmp-fabric", .data = &tegra234_bpmp_fabric },
1075 { .compatible = "nvidia,tegra234-dce-fabric", .data = &tegra234_dce_fabric },
1076 { .compatible = "nvidia,tegra234-rce-fabric", .data = &tegra234_rce_fabric },
1077 { .compatible = "nvidia,tegra234-sce-fabric", .data = &tegra234_sce_fabric },
1078 { /* sentinel */ },
1079};
1080MODULE_DEVICE_TABLE(of, tegra234_cbb_dt_ids);
1081
1082struct tegra234_cbb_acpi_uid {
1083 const char *hid;
1084 const char *uid;
1085 const struct tegra234_cbb_fabric *fabric;
1086};
1087
1088static const struct tegra234_cbb_acpi_uid tegra234_cbb_acpi_uids[] = {
1089 { "NVDA1070", "1", &tegra241_cbb_fabric },
1090 { "NVDA1070", "2", &tegra241_bpmp_fabric },
1091 { },
1092};
1093
1094static const struct
1095tegra234_cbb_fabric *tegra234_cbb_acpi_get_fabric(struct acpi_device *adev)
1096{
1097 const struct tegra234_cbb_acpi_uid *entry;
1098
1099 for (entry = tegra234_cbb_acpi_uids; entry->hid; entry++) {
1100 if (acpi_dev_hid_uid_match(adev, entry->hid, entry->uid))
1101 return entry->fabric;
1102 }
1103
1104 return NULL;
1105}
1106
1107static const struct acpi_device_id tegra241_cbb_acpi_ids[] = {
1108 { "NVDA1070" },
1109 { },
1110};
1111MODULE_DEVICE_TABLE(acpi, tegra241_cbb_acpi_ids);
1112
1113static int tegra234_cbb_probe(struct platform_device *pdev)
1114{
1115 const struct tegra234_cbb_fabric *fabric;
1116 struct tegra234_cbb *cbb;
1117 unsigned long flags = 0;
1118 int err;
1119
1120 if (pdev->dev.of_node) {
1121 fabric = of_device_get_match_data(dev: &pdev->dev);
1122 } else {
1123 struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
1124 if (!device)
1125 return -ENODEV;
1126
1127 fabric = tegra234_cbb_acpi_get_fabric(adev: device);
1128 if (!fabric) {
1129 dev_err(&pdev->dev, "no device match found\n");
1130 return -ENODEV;
1131 }
1132 }
1133
1134 cbb = devm_kzalloc(dev: &pdev->dev, size: sizeof(*cbb), GFP_KERNEL);
1135 if (!cbb)
1136 return -ENOMEM;
1137
1138 INIT_LIST_HEAD(list: &cbb->base.node);
1139 cbb->base.ops = &tegra234_cbb_ops;
1140 cbb->base.dev = &pdev->dev;
1141 cbb->fabric = fabric;
1142
1143 cbb->regs = devm_platform_get_and_ioremap_resource(pdev, index: 0, res: &cbb->res);
1144 if (IS_ERR(ptr: cbb->regs))
1145 return PTR_ERR(ptr: cbb->regs);
1146
1147 err = tegra_cbb_get_irq(pdev, NULL, sec_irq: &cbb->sec_irq);
1148 if (err)
1149 return err;
1150
1151 platform_set_drvdata(pdev, data: cbb);
1152
1153 /*
1154 * Don't enable error reporting for a Fabric if write to it's registers
1155 * is blocked by CBB firewall.
1156 */
1157 if (!tegra234_cbb_write_access_allowed(pdev, cbb)) {
1158 dev_info(&pdev->dev, "error reporting not enabled due to firewall\n");
1159 return 0;
1160 }
1161
1162 spin_lock_irqsave(&cbb_lock, flags);
1163 list_add(new: &cbb->base.node, head: &cbb_list);
1164 spin_unlock_irqrestore(lock: &cbb_lock, flags);
1165
1166 /* set ERD bit to mask SError and generate interrupt to report error */
1167 if (cbb->fabric->off_mask_erd)
1168 tegra234_cbb_mask_serror(cbb);
1169
1170 return tegra_cbb_register(cbb: &cbb->base);
1171}
1172
1173static int __maybe_unused tegra234_cbb_resume_noirq(struct device *dev)
1174{
1175 struct tegra234_cbb *cbb = dev_get_drvdata(dev);
1176
1177 tegra234_cbb_error_enable(cbb: &cbb->base);
1178
1179 dev_dbg(dev, "%s resumed\n", cbb->fabric->name);
1180
1181 return 0;
1182}
1183
1184static const struct dev_pm_ops tegra234_cbb_pm = {
1185 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, tegra234_cbb_resume_noirq)
1186};
1187
1188static struct platform_driver tegra234_cbb_driver = {
1189 .probe = tegra234_cbb_probe,
1190 .driver = {
1191 .name = "tegra234-cbb",
1192 .of_match_table = tegra234_cbb_dt_ids,
1193 .acpi_match_table = tegra241_cbb_acpi_ids,
1194 .pm = &tegra234_cbb_pm,
1195 },
1196};
1197
1198static int __init tegra234_cbb_init(void)
1199{
1200 return platform_driver_register(&tegra234_cbb_driver);
1201}
1202pure_initcall(tegra234_cbb_init);
1203
1204static void __exit tegra234_cbb_exit(void)
1205{
1206 platform_driver_unregister(&tegra234_cbb_driver);
1207}
1208module_exit(tegra234_cbb_exit);
1209
1210MODULE_DESCRIPTION("Control Backbone 2.0 error handling driver for Tegra234");
1211

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source code of linux/drivers/soc/tegra/cbb/tegra234-cbb.c