Skip to content
Snippets Groups Projects
driver-add-hilog-and-hievent-buffer-management-drive.patch 36.8 KiB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
From dab1259b6d11e2c3fc794cca2d55e7f984828a0f Mon Sep 17 00:00:00 2001
From: stesen <stesen.ma@huawei.com>
Date: Wed, 21 Jul 2021 15:14:30 +0800
Subject: [PATCH] driver: add hilog and hievent buffer management drivers
Content-Type: text/plain; charset = "utf-8"
Content-Transfert-Encoding: 8bit

ohos inclusion
category: feature
feature: dfx drivers
issue: #I3XQ1T

--------------------------------

Hilog driver is used by the hilog feature on small devices.
It manage the log buffer and provide an synced log read and
asynchronous write logic.

Hievent Driver is similar to the hilog driver, but used by
the hievent feature.

Signed-off-by: stesen <stesen.ma@huawei.com>
Signed-off-by: Zachery Wu <wuzuoyu@huawei.com>

Upstream-Status: Inappropriate [ OpenHarmony specific ]
---
 drivers/staging/Kconfig                  |   4 +
 drivers/staging/Makefile                 |   2 +
 drivers/staging/hievent/Kconfig          |   4 +
 drivers/staging/hievent/Makefile         |   3 +
 drivers/staging/hievent/hievent_driver.c | 422 +++++++++++++++++++
 drivers/staging/hievent/hievent_driver.h |  32 ++
 drivers/staging/hievent/hiview_hievent.c | 498 +++++++++++++++++++++++
 drivers/staging/hievent/hiview_hievent.h |  44 ++
 drivers/staging/hilog/Kconfig            |  21 +
 drivers/staging/hilog/Makefile           |   5 +
 drivers/staging/hilog/hilog.c            | 381 +++++++++++++++++
 11 files changed, 1416 insertions(+)
 create mode 100644 drivers/staging/hievent/Kconfig
 create mode 100644 drivers/staging/hievent/Makefile
 create mode 100644 drivers/staging/hievent/hievent_driver.c
 create mode 100644 drivers/staging/hievent/hievent_driver.h
 create mode 100644 drivers/staging/hievent/hiview_hievent.c
 create mode 100644 drivers/staging/hievent/hiview_hievent.h
 create mode 100644 drivers/staging/hilog/Kconfig
 create mode 100644 drivers/staging/hilog/Makefile
 create mode 100644 drivers/staging/hilog/hilog.c

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 2d0310448eba..4dbdc87e809c 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -118,4 +118,8 @@ source "drivers/staging/wfx/Kconfig"
 
 source "drivers/staging/hikey9xx/Kconfig"
 
+source "drivers/staging/hilog/Kconfig"
+
+source "drivers/staging/hievent/Kconfig"
+
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 757a892ab5b9..b33dfbdcce7e 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -49,3 +49,5 @@ obj-$(CONFIG_KPC2000)		+= kpc2000/
 obj-$(CONFIG_QLGE)		+= qlge/
 obj-$(CONFIG_WFX)		+= wfx/
 obj-y				+= hikey9xx/
+obj-$(CONFIG_HILOG) 		+= hilog/
+obj-$(CONFIG_HIEVENT) 		+= hievent/
diff --git a/drivers/staging/hievent/Kconfig b/drivers/staging/hievent/Kconfig
new file mode 100644
index 000000000000..39da4c041ba9
--- /dev/null
+++ b/drivers/staging/hievent/Kconfig
@@ -0,0 +1,4 @@
+config HIEVENT
+    tristate "Enable hievent"
+    help
+	hievent buffer manager
diff --git a/drivers/staging/hievent/Makefile b/drivers/staging/hievent/Makefile
new file mode 100644
index 000000000000..530802d59156
--- /dev/null
+++ b/drivers/staging/hievent/Makefile
@@ -0,0 +1,3 @@
+
+obj-$(CONFIG_HIEVENT)		+= hievent_driver.o
+obj-$(CONFIG_HIEVENT)		+= hiview_hievent.o
\ No newline at end of file
diff --git a/drivers/staging/hievent/hievent_driver.c b/drivers/staging/hievent/hievent_driver.c
new file mode 100644
index 000000000000..f6b378766abc
--- /dev/null
+++ b/drivers/staging/hievent/hievent_driver.c
@@ -0,0 +1,422 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "hievent_driver.h"
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/cdev.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/rtc.h>
+#include <linux/version.h>
+#include <linux/uio.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+
+#ifndef HIEVENTDEV_MAJOR
+#define HIEVENTDEV_MAJOR 241
+#endif
+
+#ifndef HIEVENT_NR_DEVS
+#define HIEVENT_NR_DEVS 2
+#endif
+
+static int hievent_major = HIEVENTDEV_MAJOR;
+
+static struct cdev hievent_cdev;
+
+#define HIEVENT_BUFFER ((size_t)1024)
+#define HIEVENT_DRIVER "/dev/hwlog_exception"
+
+struct hievent_entry {
+	unsigned short len;
+	unsigned short header_size;
+	int pid;
+	int tid;
+	int sec;
+	int nsec;
+	char msg[0];
+};
+
+struct hievent_char_device {
+	int flag;
+	struct mutex mtx; /* lock to protect read/write buffer */
+	unsigned char *buffer;
+	wait_queue_head_t wq;
+	size_t write_offset;
+	size_t head_offset;
+	size_t size;
+	size_t count;
+} hievent_dev;
+
+static inline unsigned char *hievent_buffer_head(void)
+{
+	if (hievent_dev.head_offset > HIEVENT_BUFFER)
+		hievent_dev.head_offset =
+			hievent_dev.head_offset % HIEVENT_BUFFER;
+
+	return hievent_dev.buffer + hievent_dev.head_offset;
+}
+
+static void hievent_buffer_inc(size_t sz)
+{
+	if (hievent_dev.size + sz <= HIEVENT_BUFFER) {
+		hievent_dev.size += sz;
+		hievent_dev.write_offset += sz;
+		hievent_dev.write_offset %= HIEVENT_BUFFER;
+		hievent_dev.count++;
+	}
+}
+
+static void hievent_buffer_dec(size_t sz)
+{
+	if (hievent_dev.size >= sz) {
+		hievent_dev.size -= sz;
+		hievent_dev.head_offset += sz;
+		hievent_dev.head_offset %= HIEVENT_BUFFER;
+		hievent_dev.count--;
+	}
+}
+
+static int hievent_read_ring_buffer(unsigned char __user *buffer,
+				    size_t buf_len)
+{
+	size_t retval;
+	size_t buf_left = HIEVENT_BUFFER - hievent_dev.head_offset;
+
+	if (buf_left > buf_len) {
+		retval = copy_to_user(buffer, hievent_buffer_head(), buf_len);
+	} else {
+		size_t mem_len = (buf_len > buf_left) ? buf_left : buf_len;
+
+		retval = copy_to_user(buffer, hievent_buffer_head(), mem_len);
+		if (retval < 0)
+			return retval;
+
+		retval = copy_to_user(buffer + buf_left, hievent_dev.buffer,
+				      buf_len - buf_left);
+	}
+	return retval;
+}
+
+static int hievent_read_ring_head_buffer(unsigned char * const buffer,
+					 size_t buf_len)
+{
+	size_t buf_left = HIEVENT_BUFFER - hievent_dev.head_offset;
+
+	if (buf_left > buf_len) {
+		memcpy(buffer, hievent_buffer_head(), buf_len);
+	} else {
+		size_t mem_len = (buf_len > buf_left) ? buf_left : buf_len;
+
+		memcpy(buffer, hievent_buffer_head(), mem_len);
+		memcpy(buffer + buf_left, hievent_dev.buffer,
+		       buf_len - buf_left);
+	}
+	return 0;
+}
+
+static ssize_t hievent_read(struct file *file, char __user *user_buf,
+			    size_t count, loff_t *ppos)
+{
+	size_t retval;
+	struct hievent_entry header;
+
+	(void)file;
+
+	wait_event_interruptible(hievent_dev.wq, (hievent_dev.size > 0));
+
+	(void)mutex_lock(&hievent_dev.mtx);
+
+	retval = hievent_read_ring_head_buffer((unsigned char *)&header,
+					       sizeof(header));
+	if (retval < 0) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	if (count < header.len + sizeof(header)) {
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	hievent_buffer_dec(sizeof(header));
+	retval = copy_to_user((unsigned char *)user_buf,
+			      (unsigned char *)&header,
+			      min(count, sizeof(header)));
+	if (retval < 0) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	retval = hievent_read_ring_buffer((unsigned char *)(user_buf +
+					  sizeof(header)), header.len);
+	if (retval < 0) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	hievent_buffer_dec(header.len);
+
+	retval = header.len + sizeof(header);
+out:
+	(void)mutex_unlock(&hievent_dev.mtx);
+
+	return retval;
+}
+
+static int hievent_write_ring_head_buffer(const unsigned char *buffer,
+					  size_t buf_len)
+{
+	size_t buf_left = HIEVENT_BUFFER - hievent_dev.write_offset;
+
+	if (buf_len > buf_left) {
+		memcpy(hievent_dev.buffer + hievent_dev.write_offset,
+		       buffer, buf_left);
+		memcpy(hievent_dev.buffer, buffer + buf_left,
+		       min(HIEVENT_BUFFER, buf_len - buf_left));
+	} else {
+		memcpy(hievent_dev.buffer + hievent_dev.write_offset,
+		       buffer, min(buf_left, buf_len));
+	}
+
+	return 0;
+}
+
+static void hievent_head_init(struct hievent_entry * const header, size_t len)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
+#define NANOSEC_PER_MIRCOSEC 1000
+	struct timeval now = { 0 };
+
+	do_gettimeofday(&now);
+
+	header->sec = now.tv_sec;
+	header->nsec = now.tv_usec * NANOSEC_PER_MIRCOSEC;
+#else
+	struct timespec64 now = { 0 };
+
+	ktime_get_real_ts64(&now);
+
+	header->sec = now.tv_sec;
+	header->nsec = now.tv_nsec;
+#endif
+
+	header->len = (unsigned short)len;
+	header->pid = current->pid;
+	header->tid = 0;
+	header->header_size = sizeof(struct hievent_entry);
+}
+
+static void hievent_cover_old_log(size_t buf_len)
+{
+	int retval;
+	struct hievent_entry header;
+	size_t total_size = buf_len + sizeof(struct hievent_entry);
+
+	while (total_size + hievent_dev.size >= HIEVENT_BUFFER) {
+		retval = hievent_read_ring_head_buffer((unsigned char *)&header,
+						       sizeof(header));
+		if (retval < 0)
+			break;
+
+		/* let count decrease twice */
+		hievent_buffer_dec(sizeof(header));
+		hievent_buffer_dec(header.len);
+	}
+}
+
+int hievent_write_internal(const char *buffer, size_t buf_len)
+{
+	struct hievent_entry header;
+	int retval;
+
+	if (buf_len < sizeof(int) ||
+	    buf_len > HIEVENT_BUFFER - sizeof(struct hievent_entry))
+		return -EINVAL;
+
+	(void)mutex_lock(&hievent_dev.mtx);
+
+	hievent_cover_old_log(buf_len);
+
+	hievent_head_init(&header, buf_len);
+
+	retval = hievent_write_ring_head_buffer((unsigned char *)&header,
+						sizeof(header));
+	if (retval) {
+		retval = -EINVAL;
+		goto out;
+	}
+	hievent_buffer_inc(sizeof(header));
+
+	retval = hievent_write_ring_head_buffer((unsigned char *)(buffer),
+						header.len);
+	if (retval) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	hievent_buffer_inc(header.len);
+
+	retval = header.len;
+
+out:
+	(void)mutex_unlock(&hievent_dev.mtx);
+	if (retval > 0)
+		wake_up_interruptible(&hievent_dev.wq);
+
+	return retval;
+}
+
+static unsigned int hievent_poll(struct file *filep,
+				 struct poll_table_struct *fds)
+{
+	(void)filep;
+	(void)fds;
+
+	wait_event_interruptible(hievent_dev.wq, (hievent_dev.size > 0));
+
+	return (POLLOUT | POLLWRNORM);
+}
+
+static ssize_t  hievent_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	int check_code = 0;
+	unsigned char *temp_buffer = NULL;
+	const struct iovec *iov = from->iov;
+	int retval;
+	int buf_len;
+
+	(void)iocb;
+	if (from->nr_segs != 3) {     /* must contain 3 segments */
+		retval = -EINVAL;
+		goto out;
+	}
+
+	retval = copy_from_user(&check_code, iov[0].iov_base,
+				sizeof(check_code));
+	if (retval || check_code != CHECK_CODE) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	/* seg 1 && 2 is head info */
+	buf_len = iov[1].iov_len + iov[2].iov_len;
+	if (buf_len > HIEVENT_BUFFER - sizeof(struct hievent_entry)) {
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	temp_buffer = kmalloc(buf_len, GFP_KERNEL);
+	if (!temp_buffer) {
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	retval = copy_from_user(temp_buffer, iov[1].iov_base, iov[1].iov_len);
+	if (retval) {
+		retval = -EIO;
+		goto free_mem;
+	}
+
+	/* 1 2 head info */
+	retval = copy_from_user(temp_buffer + iov[1].iov_len, iov[2].iov_base,
+				iov[2].iov_len);
+	if (retval) {
+		retval = -EIO;
+		goto free_mem;
+	}
+
+	retval = hievent_write_internal(temp_buffer, buf_len);
+	if (retval) {
+		retval = -EIO;
+		goto free_mem;
+	}
+
+	retval = buf_len + iov[0].iov_len;
+
+free_mem:
+	kfree(temp_buffer);
+
+out:
+	return retval;
+}
+
+static const struct file_operations hievent_fops = {
+	.read  = hievent_read,   /* read */
+	.poll  = hievent_poll,   /* poll */
+	.write_iter = hievent_write_iter, /* write_iter */
+};
+
+static void hievent_device_init(void)
+{
+	hievent_dev.buffer = kmalloc(HIEVENT_BUFFER, GFP_KERNEL);
+	if (!hievent_dev.buffer)
+		return;
+
+	init_waitqueue_head(&hievent_dev.wq);
+	mutex_init(&hievent_dev.mtx);
+	hievent_dev.write_offset = 0;
+	hievent_dev.head_offset = 0;
+	hievent_dev.size = 0;
+	hievent_dev.count = 0;
+}
+
+static int __init hieventdev_init(void)
+{
+	int result;
+	dev_t devno = MKDEV(hievent_major, 0);
+
+	result = register_chrdev_region(devno, 2, "hwlog_exception");
+	if (result < 0)
+		return result;
+
+	cdev_init(&hievent_cdev, &hievent_fops);
+	hievent_cdev.owner = THIS_MODULE;
+	hievent_cdev.ops = &hievent_fops;
+
+	cdev_add(&hievent_cdev, MKDEV(hievent_major, 0), HIEVENT_NR_DEVS);
+
+	hievent_device_init();
+	return 0;
+}
+
+static void __exit hievent_exit_module(void)
+{
+	cdev_del(&hievent_cdev);
+	unregister_chrdev_region(MKDEV(hievent_major, 0), HIEVENT_NR_DEVS);
+}
+
+static int __init hievent_init_module(void)
+{
+	int state;
+
+	state = hieventdev_init();
+	return 0;
+}
+
+module_init(hievent_init_module);
+module_exit(hievent_exit_module);
+
+MODULE_AUTHOR("OHOS");
+MODULE_DESCRIPTION("User mode hievent device interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("hievent");
diff --git a/drivers/staging/hievent/hievent_driver.h b/drivers/staging/hievent/hievent_driver.h
new file mode 100644
index 000000000000..56eb0c5ea316
--- /dev/null
+++ b/drivers/staging/hievent/hievent_driver.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef HIEVENT_DRIVER_H
+#define HIEVENT_DRIVER_H
+
+#include <linux/types.h>
+
+#define CHECK_CODE 0x7BCDABCD
+
+struct idap_header {
+	char level;
+	char category;
+	char log_type;
+	char sn;
+};
+
+int hievent_write_internal(const char *buffer, size_t buf_len);
+
+#endif /* HIEVENT_DRIVER_H */
diff --git a/drivers/staging/hievent/hiview_hievent.c b/drivers/staging/hievent/hiview_hievent.c
new file mode 100644
index 000000000000..552965dfacb4
--- /dev/null
+++ b/drivers/staging/hievent/hiview_hievent.c
@@ -0,0 +1,498 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Huawei Technologies Co., Ltd. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "hiview_hievent.h"
+#include "hievent_driver.h"
+
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#define INT_TYPE_MAX_LEN    21
+
+#define MAX_PATH_LEN        256
+#define MAX_STR_LEN         (10 * 1024)
+
+/* 64K is max length of /dev/hwlog_exception */
+#define EVENT_INFO_BUF_LEN         (64 * 1024)
+#define EVENT_INFO_PACK_BUF_LEN    (2 * 1024)
+
+#define BUF_POINTER_FORWARD                     \
+do {                                    \
+	if (tmplen < len) {                 \
+		tmp += tmplen;                  \
+		len -= tmplen;                  \
+	} else {                            \
+		tmp += len;                     \
+		len = 0;                        \
+	}                                   \
+} while (0)
+
+struct hievent_payload {
+	char *key;
+	char *value;
+	struct hievent_payload *next;
+};
+
+static int hievent_convert_string(struct hiview_hievent *event, char **pbuf);
+
+static struct hievent_payload *hievent_payload_create(void);
+
+static void hievent_payload_destroy(struct hievent_payload *p);
+
+static struct hievent_payload *hievent_get_payload(struct hievent_payload *head,
+						   const char *key);
+
+static void hievent_add_payload(struct hiview_hievent *obj,
+				struct hievent_payload *payload);
+
+static struct hievent_payload *hievent_payload_create(void)
+{
+	struct hievent_payload *payload = NULL;
+
+	payload = kmalloc(sizeof(*payload), GFP_KERNEL);
+	if (!payload)
+		return NULL;
+
+	payload->key = NULL;
+	payload->value = NULL;
+	payload->next = NULL;
+
+	return payload;
+}
+
+static void hievent_payload_destroy(struct hievent_payload *p)
+{
+	if (!p)
+		return;
+
+	kfree(p->value);
+	kfree(p->key);
+	kfree(p);
+}
+
+static struct hievent_payload *hievent_get_payload(struct hievent_payload *head,
+						   const char *key)
+{
+	struct hievent_payload *p = head;
+
+	while (p) {
+		if (key && p->key) {
+			if (strcmp(p->key, key) == 0)
+				return p;
+		}
+		p = p->next;
+	}
+
+	return NULL;
+}
+
+static void hievent_add_payload(struct hiview_hievent *obj,
+				struct hievent_payload *payload)
+{
+	if (!obj->head) {
+		obj->head = payload;
+	} else {
+		struct hievent_payload *p = obj->head;
+
+		while (p->next)
+			p = p->next;
+		p->next = payload;
+	}
+}
+
+struct hiview_hievent *hievent_create(unsigned int eventid)
+{
+	struct hiview_hievent *event = NULL;
+
+	/* combined event obj struct */
+	event = kmalloc(sizeof(*event), GFP_KERNEL);
+	if (!event)
+		return NULL;
+
+	memset(event, 0, sizeof(*event));
+	event->eventid = eventid;
+	pr_debug("%s : %u\n", __func__, eventid);
+
+	return (void *)event;
+}
+
+int hievent_put_integer(struct hiview_hievent *event,
+			const char *key, long value)
+{
+	int ret;
+	struct hievent_payload *payload = NULL;
+
+	if ((!event) || (!key)) {
+		pr_err("Bad input event or key for %s", __func__);
+		return -EINVAL;
+	}
+
+	payload = hievent_get_payload(event->head, key);
+	if (!payload) {
+		payload = hievent_payload_create();
+		if (!payload)
+			return -ENOMEM;
+		payload->key = kstrdup(key, GFP_KERNEL);
+		hievent_add_payload(event, payload);
+	}
+
+	kfree(payload->value);
+
+	payload->value = kmalloc(INT_TYPE_MAX_LEN, GFP_KERNEL);
+	if (!payload->value)
+		return -ENOMEM;
+
+	(void)memset(payload->value, 0, INT_TYPE_MAX_LEN);
+	ret = snprintf(payload->value, INT_TYPE_MAX_LEN, "%d", (int)value);
+	if (ret < 0)
+		return -ENOMEM;
+
+	return 0;
+}
+
+int hievent_put_string(struct hiview_hievent *event,
+		       const char *key, const char *value)
+{
+	struct hievent_payload *payload = NULL;
+	int len;
+
+	if ((!event) || (!key) || (!value)) {
+		pr_err("Bad key for %s", __func__);
+		return -EINVAL;
+	}
+
+	payload = hievent_get_payload(event->head, key);
+	if (!payload) {
+		payload = hievent_payload_create();
+		if (!payload)
+			return -ENOMEM;
+
+		payload->key = kstrdup(key, GFP_KERNEL);
+		hievent_add_payload(event, payload);
+	}
+
+	kfree(payload->value);
+
+	len = strlen(value);
+	/* prevent length larger than MAX_STR_LEN */
+	if (len > MAX_STR_LEN)
+		len = MAX_STR_LEN;
+
+	payload->value = kmalloc(len + 1, GFP_KERNEL);
+	if (!payload->value)
+		return -ENOMEM;
+
+	(void)memset(payload->value, 0, len + 1);
+	if (strncpy(payload->value, value, len) > 0)
+		payload->value[len] = '\0';
+
+	return 0;
+}
+
+int hievent_set_time(struct hiview_hievent *event, long long seconds)
+{
+	if ((!event) || (seconds == 0)) {
+		pr_err("Bad input for %s", __func__);
+		return -EINVAL;
+	}
+	event->time = seconds;
+	return 0;
+}
+
+static int append_array_item(char **pool, int pool_len, const char *path)
+{
+	int i;
+
+	if ((!path) || (path[0] == 0)) {
+		pr_err("Bad path %s", __func__);
+		return -EINVAL;
+	}
+
+	if (strlen(path) > MAX_PATH_LEN) {
+		pr_err("file path over max: %d", MAX_PATH_LEN);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < pool_len; i++) {
+		if (pool[i] != 0)
+			continue;
+
+		pool[i] = kstrdup(path, GFP_KERNEL);
+		if (!pool[i])
+			return -ENOMEM;
+
+		break;
+	}
+
+	if (i == MAX_PATH_NUMBER) {
+		pr_err("Too many paths");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int hievent_add_filepath(struct hiview_hievent *event, const char *path)
+{
+	if (!event) {
+		pr_err("Bad path %s", __func__);
+		return -EINVAL;
+	}
+	return append_array_item(event->file_path, MAX_PATH_NUMBER, path);
+}
+
+/* make string ":" to "::", ";" to ";;", and remove newline character
+ * for example: "abc:def;ghi" transfer to "abc::def;;ghi"
+ */
+static char *hievent_make_regular(char *value)
+{
+	int count = 0;
+	int len = 0;
+	char *temp = value;
+	char *regular = NULL;
+	char *regular_tmp = NULL;
+	size_t regular_len;
+
+	while (*temp != '\0') {
+		if (*temp == ':')
+			count++;
+		else if (*temp == ';')
+			count++;
+		else if ((*temp == '\n') || (*temp == '\r'))
+			*temp = ' ';
+
+		temp++;
+		len++;
+	}
+
+	/* no need to transfer, just return old value */
+	if (count == 0)
+		return value;
+
+	regular_len = len + count * 2 + 1; // 2 char in a byte
+	regular = kmalloc(regular_len, GFP_KERNEL);
+	if (!regular)
+		return NULL;
+
+	(void)memset(regular, 0, regular_len);
+	regular_tmp = regular;
+	temp = value;
+	while (*temp != 0) {
+		if ((*temp == ':') || (*temp == ';'))
+			*regular_tmp++ = *temp;
+
+		*regular_tmp++ = *temp;
+		temp++;
+	}
+	*regular_tmp = '\0';
+
+	return regular;
+}
+
+int logbuff_to_exception(char category, int level, char log_type,
+			 char sn, const char *msg, int msglen)
+{
+	struct idap_header *hdr = NULL;
+	size_t buf_len = sizeof(int) + sizeof(struct idap_header) + msglen;
+	int ret;
+	int *check_code = NULL;
+	char *buffer = kmalloc(buf_len, GFP_KERNEL);
+
+	if (!buffer)
+		return -ENOMEM;
+
+	check_code = (int *)buffer;
+	*check_code = CHECK_CODE;
+
+	hdr = (struct idap_header *)(buffer + sizeof(int));
+	hdr->level = level;
+	hdr->category = category;
+	hdr->log_type = log_type;
+	hdr->sn = sn;
+
+	memcpy(buffer + sizeof(int) + sizeof(struct idap_header), msg, msglen);
+
+	ret = hievent_write_internal(buffer, buf_len);
+
+	kfree(buffer);
+
+	return ret;
+}
+
+static int hievent_fill_payload(struct hiview_hievent *event, char **pbuf,
+				char *tmp, int length)
+{
+	struct hievent_payload *p = event->head;
+	int len = length;
+	int tmplen;
+	unsigned int keycount = 0;
+
+	while (p) {
+		char *value = NULL;
+		char *regular_value = NULL;
+		int need_free = 1;
+
+		if (!p->value) {
+			p = p->next;
+			continue;
+		}
+		if (keycount == 0) {
+			tmplen = snprintf(tmp, len - 1, " --extra ");
+			BUF_POINTER_FORWARD;
+		}
+		keycount++;
+
+		/* fill key */
+		if (p->key)
+			tmplen = snprintf(tmp, len - 1, "%s:", p->key);
+
+		BUF_POINTER_FORWARD;
+		/* fill value */
+		tmplen = 0;
+
+		value = p->value;
+		regular_value = hievent_make_regular(value);
+		if (!regular_value) {
+			regular_value = "NULL";
+			need_free = 0;
+		}
+		tmplen = snprintf(tmp, len - 1, "%s;", regular_value);
+		if ((value != regular_value) && need_free)
+			kfree(regular_value);
+
+		BUF_POINTER_FORWARD;
+		p = p->next;
+	}
+	return len;
+}
+
+static int hievent_convert_string(struct hiview_hievent *event, char **pbuf)
+{
+	int len;
+	char *tmp = NULL;
+	int tmplen;
+	unsigned int i;
+
+	char *buf = kmalloc(EVENT_INFO_BUF_LEN, GFP_KERNEL);
+
+	if (!buf) {
+		*pbuf = NULL;
+		return 0;
+	}
+
+	(void)memset(buf, 0, EVENT_INFO_BUF_LEN);
+	len = EVENT_INFO_BUF_LEN;
+	tmp = buf;
+
+	/* fill eventid */
+	tmplen = snprintf(tmp, len - 1, "eventid %d", event->eventid);
+	BUF_POINTER_FORWARD;
+
+	/* fill the path */
+	for (i = 0; i < MAX_PATH_NUMBER; i++) {
+		if (!event->file_path[i])
+			break;
+
+		tmplen = snprintf(tmp, len - 1, " -i %s", event->file_path[i]);
+		BUF_POINTER_FORWARD;
+	}
+
+	/* fill time */
+	if (event->time) {
+		tmplen = snprintf(tmp, len - 1, " -t %lld",  event->time);
+		BUF_POINTER_FORWARD;
+	}
+
+	/* fill the payload info */
+	len = hievent_fill_payload(event, pbuf, tmp, len);
+	*pbuf = buf;
+	return (EVENT_INFO_BUF_LEN - len);
+}
+
+#define IDAP_LOGTYPE_CMD 1
+static int hievent_write_logexception(char *str, const int strlen)
+{
+	char tempchr;
+	char *strptr = str;
+	int left_buf_len = strlen + 1;
+	int sent_cnt = 0;
+
+	while (left_buf_len > 0) {
+		if (left_buf_len > EVENT_INFO_PACK_BUF_LEN) {
+			tempchr = strptr[EVENT_INFO_PACK_BUF_LEN - 1];
+			strptr[EVENT_INFO_PACK_BUF_LEN - 1] = '\0';
+			logbuff_to_exception(0, 0, IDAP_LOGTYPE_CMD, 1, strptr,
+					     EVENT_INFO_PACK_BUF_LEN);