Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright(c) 2017 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/libnvdimm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/badblocks.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/ndctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "nd-core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "nd.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) void badrange_init(struct badrange *badrange)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	INIT_LIST_HEAD(&badrange->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	spin_lock_init(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) EXPORT_SYMBOL_GPL(badrange_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static void append_badrange_entry(struct badrange *badrange,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		struct badrange_entry *bre, u64 addr, u64 length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	lockdep_assert_held(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	bre->start = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	bre->length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	list_add_tail(&bre->list, &badrange->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static int alloc_and_append_badrange_entry(struct badrange *badrange,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		u64 addr, u64 length, gfp_t flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct badrange_entry *bre;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	bre = kzalloc(sizeof(*bre), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (!bre)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	append_badrange_entry(badrange, bre, addr, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static int add_badrange(struct badrange *badrange, u64 addr, u64 length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct badrange_entry *bre, *bre_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	spin_unlock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	bre_new = kzalloc(sizeof(*bre_new), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	spin_lock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (list_empty(&badrange->list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		if (!bre_new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		append_badrange_entry(badrange, bre_new, addr, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	 * There is a chance this is a duplicate, check for those first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	 * This will be the common case as ARS_STATUS returns all known
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	 * errors in the SPA space, and we can't query it per region
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	list_for_each_entry(bre, &badrange->list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (bre->start == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			/* If length has changed, update this list entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			if (bre->length != length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				bre->length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			kfree(bre_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	 * If not a duplicate or a simple length update, add the entry as is,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	 * as any overlapping ranges will get resolved when the list is consumed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	 * and converted to badblocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (!bre_new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	append_badrange_entry(badrange, bre_new, addr, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) int badrange_add(struct badrange *badrange, u64 addr, u64 length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	spin_lock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	rc = add_badrange(badrange, addr, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	spin_unlock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) EXPORT_SYMBOL_GPL(badrange_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) void badrange_forget(struct badrange *badrange, phys_addr_t start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct list_head *badrange_list = &badrange->list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	u64 clr_end = start + len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct badrange_entry *bre, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	spin_lock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	 * [start, clr_end] is the badrange interval being cleared.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	 * [bre->start, bre_end] is the badrange_list entry we're comparing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	 * the above interval against. The badrange list entry may need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 * to be modified (update either start or length), deleted, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	 * split into two based on the overlap characteristics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	list_for_each_entry_safe(bre, next, badrange_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		u64 bre_end = bre->start + bre->length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		/* Skip intervals with no intersection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		if (bre_end < start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		if (bre->start >  clr_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		/* Delete completely overlapped badrange entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		if ((bre->start >= start) && (bre_end <= clr_end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			list_del(&bre->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			kfree(bre);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		/* Adjust start point of partially cleared entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		if ((start <= bre->start) && (clr_end > bre->start)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			bre->length -= clr_end - bre->start + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			bre->start = clr_end + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		/* Adjust bre->length for partial clearing at the tail end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		if ((bre->start < start) && (bre_end <= clr_end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			/* bre->start remains the same */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			bre->length = start - bre->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		 * If clearing in the middle of an entry, we split it into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		 * two by modifying the current entry to represent one half of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		 * the split, and adding a new entry for the second half.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		if ((bre->start < start) && (bre_end > clr_end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			u64 new_start = clr_end + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			u64 new_len = bre_end - new_start + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			/* Add new entry covering the right half */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			alloc_and_append_badrange_entry(badrange, new_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					new_len, GFP_NOWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			/* Adjust this entry to cover the left half */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			bre->length = start - bre->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	spin_unlock(&badrange->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL_GPL(badrange_forget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void set_badblock(struct badblocks *bb, sector_t s, int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	dev_dbg(bb->dev, "Found a bad range (0x%llx, 0x%llx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			(u64) s * 512, (u64) num * 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	/* this isn't an error as the hardware will still throw an exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (badblocks_set(bb, s, num, 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		dev_info_once(bb->dev, "%s: failed for sector %llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				__func__, (u64) s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  * __add_badblock_range() - Convert a physical address range to bad sectors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  * @bb:		badblocks instance to populate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * @ns_offset:	namespace offset where the error range begins (in bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * @len:	number of bytes of badrange to be added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  * This assumes that the range provided with (ns_offset, len) is within
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  * the bounds of physical addresses for this namespace, i.e. lies in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * interval [ns_start, ns_start + ns_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	const unsigned int sector_size = 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	sector_t start_sector, end_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	u64 num_sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	u32 rem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	start_sector = div_u64(ns_offset, sector_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	end_sector = div_u64_rem(ns_offset + len, sector_size, &rem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (rem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		end_sector++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	num_sectors = end_sector - start_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (unlikely(num_sectors > (u64)INT_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		u64 remaining = num_sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		sector_t s = start_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		while (remaining) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			int done = min_t(u64, remaining, INT_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			set_badblock(bb, s, done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			remaining -= done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			s += done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		set_badblock(bb, start_sector, num_sectors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static void badblocks_populate(struct badrange *badrange,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		struct badblocks *bb, const struct range *range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct badrange_entry *bre;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (list_empty(&badrange->list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	list_for_each_entry(bre, &badrange->list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		u64 bre_end = bre->start + bre->length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		/* Discard intervals with no intersection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (bre_end < range->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		if (bre->start > range->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		/* Deal with any overlap after start of the namespace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		if (bre->start >= range->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			u64 start = bre->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			u64 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			if (bre_end <= range->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 				len = bre->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 				len = range->start + range_len(range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 					- bre->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			__add_badblock_range(bb, start - range->start, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		 * Deal with overlap for badrange starting before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		 * the namespace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		if (bre->start < range->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			u64 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 			if (bre_end < range->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 				len = bre->start + bre->length - range->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				len = range_len(range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			__add_badblock_range(bb, 0, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)  * nvdimm_badblocks_populate() - Convert a list of badranges to badblocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)  * @region: parent region of the range to interrogate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)  * @bb: badblocks instance to populate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)  * @res: resource range to consider
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)  * The badrange list generated during bus initialization may contain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)  * multiple, possibly overlapping physical address ranges.  Compare each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)  * of these ranges to the resource range currently being initialized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)  * and add badblocks entries for all matching sub-ranges
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) void nvdimm_badblocks_populate(struct nd_region *nd_region,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		struct badblocks *bb, const struct range *range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct nvdimm_bus *nvdimm_bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (!is_memory(&nd_region->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		dev_WARN_ONCE(&nd_region->dev, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 				"%s only valid for pmem regions\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	nvdimm_bus_lock(&nvdimm_bus->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	badblocks_populate(&nvdimm_bus->badrange, bb, range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	nvdimm_bus_unlock(&nvdimm_bus->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate);