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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/arch/powerpc/kernel/nvram_64.c
....@@ -1,18 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  c 2001 PPC 64 Team, IBM Corp
34  *
4
- *      This program is free software; you can redistribute it and/or
5
- *      modify it under the terms of the GNU General Public License
6
- *      as published by the Free Software Foundation; either version
7
- *      2 of the License, or (at your option) any later version.
8
- *
95  * /dev/nvram driver for PPC64
10
- *
11
- * This perhaps should live in drivers/char
12
- *
13
- * TODO: Split the /dev/nvram part (that one can use
14
- *       drivers/char/generic_nvram.c) from the arch & partition
15
- *       parsing code.
166  */
177 
188 #include <linux/types.h>
....@@ -83,7 +73,8 @@
8373 };
8474 
8575 static void oops_to_nvram(struct kmsg_dumper *dumper,
86
-			  enum kmsg_dump_reason reason);
76
+			  enum kmsg_dump_reason reason,
77
+			  struct kmsg_dumper_iter *iter);
8778 
8879 static struct kmsg_dumper nvram_kmsg_dumper = {
8980 	.dump = oops_to_nvram
....@@ -653,7 +644,8 @@
653644  * partition.  If that's too much, go back and capture uncompressed text.
654645  */
655646 static void oops_to_nvram(struct kmsg_dumper *dumper,
656
-			  enum kmsg_dump_reason reason)
647
+			  enum kmsg_dump_reason reason,
648
+			  struct kmsg_dumper_iter *iter)
657649 {
658650 	struct oops_log_info *oops_hdr = (struct oops_log_info *)oops_buf;
659651 	static unsigned int oops_count = 0;
....@@ -665,9 +657,7 @@
665657 	int rc = -1;
666658 
667659 	switch (reason) {
668
-	case KMSG_DUMP_RESTART:
669
-	case KMSG_DUMP_HALT:
670
-	case KMSG_DUMP_POWEROFF:
660
+	case KMSG_DUMP_SHUTDOWN:
671661 		/* These are almost always orderly shutdowns. */
672662 		return;
673663 	case KMSG_DUMP_OOPS:
....@@ -693,13 +683,13 @@
693683 		return;
694684 
695685 	if (big_oops_buf) {
696
-		kmsg_dump_get_buffer(dumper, false,
686
+		kmsg_dump_get_buffer(iter, false,
697687 				     big_oops_buf, big_oops_buf_sz, &text_len);
698688 		rc = zip_oops(text_len);
699689 	}
700690 	if (rc != 0) {
701
-		kmsg_dump_rewind(dumper);
702
-		kmsg_dump_get_buffer(dumper, false,
691
+		kmsg_dump_rewind(iter);
692
+		kmsg_dump_get_buffer(iter, false,
703693 				     oops_data, oops_data_sz, &text_len);
704694 		err_type = ERR_TYPE_KERNEL_PANIC;
705695 		oops_hdr->version = cpu_to_be16(OOPS_HDR_VERSION);
....@@ -713,136 +703,6 @@
713703 
714704 	spin_unlock_irqrestore(&lock, flags);
715705 }
716
-
717
-static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
718
-{
719
-	if (ppc_md.nvram_size == NULL)
720
-		return -ENODEV;
721
-	return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
722
-					ppc_md.nvram_size());
723
-}
724
-
725
-
726
-static ssize_t dev_nvram_read(struct file *file, char __user *buf,
727
-			  size_t count, loff_t *ppos)
728
-{
729
-	ssize_t ret;
730
-	char *tmp = NULL;
731
-	ssize_t size;
732
-
733
-	if (!ppc_md.nvram_size) {
734
-		ret = -ENODEV;
735
-		goto out;
736
-	}
737
-
738
-	size = ppc_md.nvram_size();
739
-	if (size < 0) {
740
-		ret = size;
741
-		goto out;
742
-	}
743
-
744
-	if (*ppos >= size) {
745
-		ret = 0;
746
-		goto out;
747
-	}
748
-
749
-	count = min_t(size_t, count, size - *ppos);
750
-	count = min(count, PAGE_SIZE);
751
-
752
-	tmp = kmalloc(count, GFP_KERNEL);
753
-	if (!tmp) {
754
-		ret = -ENOMEM;
755
-		goto out;
756
-	}
757
-
758
-	ret = ppc_md.nvram_read(tmp, count, ppos);
759
-	if (ret <= 0)
760
-		goto out;
761
-
762
-	if (copy_to_user(buf, tmp, ret))
763
-		ret = -EFAULT;
764
-
765
-out:
766
-	kfree(tmp);
767
-	return ret;
768
-
769
-}
770
-
771
-static ssize_t dev_nvram_write(struct file *file, const char __user *buf,
772
-			  size_t count, loff_t *ppos)
773
-{
774
-	ssize_t ret;
775
-	char *tmp = NULL;
776
-	ssize_t size;
777
-
778
-	ret = -ENODEV;
779
-	if (!ppc_md.nvram_size)
780
-		goto out;
781
-
782
-	ret = 0;
783
-	size = ppc_md.nvram_size();
784
-	if (*ppos >= size || size < 0)
785
-		goto out;
786
-
787
-	count = min_t(size_t, count, size - *ppos);
788
-	count = min(count, PAGE_SIZE);
789
-
790
-	tmp = memdup_user(buf, count);
791
-	if (IS_ERR(tmp)) {
792
-		ret = PTR_ERR(tmp);
793
-		goto out;
794
-	}
795
-
796
-	ret = ppc_md.nvram_write(tmp, count, ppos);
797
-
798
-	kfree(tmp);
799
-out:
800
-	return ret;
801
-}
802
-
803
-static long dev_nvram_ioctl(struct file *file, unsigned int cmd,
804
-			    unsigned long arg)
805
-{
806
-	switch(cmd) {
807
-#ifdef CONFIG_PPC_PMAC
808
-	case OBSOLETE_PMAC_NVRAM_GET_OFFSET:
809
-		printk(KERN_WARNING "nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n");
810
-	case IOC_NVRAM_GET_OFFSET: {
811
-		int part, offset;
812
-
813
-		if (!machine_is(powermac))
814
-			return -EINVAL;
815
-		if (copy_from_user(&part, (void __user*)arg, sizeof(part)) != 0)
816
-			return -EFAULT;
817
-		if (part < pmac_nvram_OF || part > pmac_nvram_NR)
818
-			return -EINVAL;
819
-		offset = pmac_get_partition(part);
820
-		if (offset < 0)
821
-			return offset;
822
-		if (copy_to_user((void __user*)arg, &offset, sizeof(offset)) != 0)
823
-			return -EFAULT;
824
-		return 0;
825
-	}
826
-#endif /* CONFIG_PPC_PMAC */
827
-	default:
828
-		return -EINVAL;
829
-	}
830
-}
831
-
832
-static const struct file_operations nvram_fops = {
833
-	.owner		= THIS_MODULE,
834
-	.llseek		= dev_nvram_llseek,
835
-	.read		= dev_nvram_read,
836
-	.write		= dev_nvram_write,
837
-	.unlocked_ioctl	= dev_nvram_ioctl,
838
-};
839
-
840
-static struct miscdevice nvram_dev = {
841
-	NVRAM_MINOR,
842
-	"nvram",
843
-	&nvram_fops
844
-};
845
-
846706 
847707 #ifdef DEBUG_NVRAM
848708 static void __init nvram_print_partitions(char * label)
....@@ -991,9 +851,11 @@
991851 	long size = 0;
992852 	int rc;
993853 
854
+	BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
855
+
994856 	/* Convert sizes from bytes to blocks */
995
-	req_size = _ALIGN_UP(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
996
-	min_size = _ALIGN_UP(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
857
+	req_size = ALIGN(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
858
+	min_size = ALIGN(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN;
997859 
998860 	/* If no minimum size specified, make it the same as the
999861 	 * requested size
....@@ -1191,22 +1053,3 @@
11911053 	kfree(header);
11921054 	return err;
11931055 }
1194
-
1195
-static int __init nvram_init(void)
1196
-{
1197
-	int rc;
1198
-	
1199
-	BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
1200
-
1201
-	if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
1202
-		return  -ENODEV;
1203
-
1204
-  	rc = misc_register(&nvram_dev);
1205
-	if (rc != 0) {
1206
-		printk(KERN_ERR "nvram_init: failed to register device\n");
1207
-		return rc;
1208
-	}
1209
-  	
1210
-  	return rc;
1211
-}
1212
-device_initcall(nvram_init);