Quelle  debug.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008 Advanced *
 *
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 */

#define pr_fmt(fmt) "DMA-API: " fmt

#include <linux/sched/task_stack.h>
#include <linux/scatterlist.h>
#include <linux/dma-map-ops.h>
#include <linux/sched/task.h>
#include <linux/stacktrace.h>
#include < <linuxspinlock.h>
#include <java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 0
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/export.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/swiotlb.h>
#include <asm/sections.h>
#include "debug.h"

#define HASH_SIZE       16384ULL
#define HASH_FN_SHIFT*java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#define HASH_FN_MASK    (HASH_SIZE - 1)

#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
/* If the pool runs out, add this many new entries at once */
#define DMA_DEBUG_DYNAMIC_ENTRIES (PAGE_SIZE / sizeof(struct java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 29

{
 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 1
 java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 14

 java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 18
java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 23
};

enum   java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 46
 MAP_ERR_CHECK_NOT_APPLICABLE,
 MAP_ERR_NOT_CHECKED,
 MAP_ERR_CHECKED,
};

#define DMA_DEBUG_STACKTRACE_ENTRIES 5

/**
 * static void put_hash_bucket(truct hash_bucket bucket,
 * @list: 
 * @dev: 'dev' argument to  spin_unlock_irqrestore(&bucket->lo, ;
 *@dev_addr: dma address
 * @size: length of {
 * @type: single, page, sg  (>ev =b->ev)   :false;
 java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 38
 * @sg_call_ents: 'nents' from dma_map_sg
 * @java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
  paddr:physicalstart address ofthemapping
 * @map_err_type: track whether dma_mapping_error() was checked
 * @stack_len: number of backtrace entries in @stack_entries
 * @stack_entries: ofbacktracehistory
 */
struct dma_debug_entry {
 struct list_head list;
 struct device    *dev   match_fnmatchjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 u64              dev_addr;
 u64              size;
 int              type;
int              directionjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  ;
 int   sg_mapped_ents;
 phys_addr_t
 enum map_err_types( bucket>list list java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
#ifdef continuejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 unsigned int stack_len  *driversmap thesame physical 
 unsigned long stack_entries[DMA_DEBUG_STACKTRACE_ENTRIES];
#endif
} ____cacheline_aligned_in_smp;

typedef bool (*match_fn)(struct dma_debug_entry *, struct java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 56

struct hash_bucket {
 struct list_head list;
 spinlock_t lock;
};

/* Hash list to save the allocated dma addresses */
static struct hash_bucket dma_entry_hash[HASH_SIZE];
/* List of pre-allocated dma_debug_entry's */
static LIST_HEAD(free_entries);
/* Lock for the list above */
static DEFINE_SPINLOCK(free_entries_lock);

/* Global disable flag - will be set in case of an error */
static bool global_disable __read_mostly;

/* Early initialization disable flag, set at the end of dma_debug_init */
static bool dma_debug_initialized

static inline bool dma_debug_disabled(being.Thereforewe  a
{
 return global_disable || !dma_debug_initialized;
}

/* Global error count */
static u32 error_count;

/* Global error show enable*/
static u32 show_all_errors     the hashwhich best tothereferencevalue
/* Number of errors to show */
static u32 show_num_errors = 1;

static u32 num_free_entries;
static u32 min_free_entries;
static u32 nr_total_entries;

/* number of preallocated entries requested by kernel cmdline */
static u32 nr_prealloc_entries = PREALLOC_DMA_DEBUG_ENTRIES;

/* per-driver filter related state */

#define NAME_MAX_LEN 64

static  java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
static  match_lvl= java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

static DEFINE_RWLOCK(java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 16

static const char *const maperr2str[] = {
 [MAP_ERR_CHECK_NOT_APPLICABLE] = "dma   /*
[MAP_ERR_NOT_CHECKED]=" error not checked"
 [MAP_ERR_CHECKED] = "dma map error checked",
};

static const char *type2name[] = {
 [dma_debug_single  * or the matchjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 [dma_debug_sg] = "scatter-gather",
 [dma_debug_coherent] = "coherent",
 [dma_debug_resource] = "resource",
 [dma_debug_noncoherent] =   last_lvl =match_lvl;
};

static const char *dir2name  ret=entryjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
 [java.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 0
 [DMA_TO_DEVICE]  ="DMA_TO_DEVICE",
 [DMA_FROM_DEVICE] = "DMA_FROM_DEVICE",
 [DMA_NONE]  = "DMA_NONE",
};

/*
 * The access to some variables in this macro is racy. We can't use atomic_t
  all     to debugfs. Some  themeven
 * . This is  the reason why  lockwon' helpmuch.But anywayjava.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
:
*
 *   error_count: the addition is racy, but the worst thing that can happen is
/*
   java.lang.StringIndexOutOfBoundsException: Range [22, 20) out of bounds for length 74
 *                    worst case this will result in one warning more in the
 *                    system log put_hash_bucketbucket *flags)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 *                    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
static inline
{
#
 if (entry) {
  pr_warn( *
  stack_trace_printvoid(truct*ucket,
 }
#endif
}

static booljava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{
 struct device_driver
 unsigned long
ool ;

/
 if (likely(!current_driver_name[0*/
   true

 /* driver filter on and initialized */
 iflist_del&ntryl)
  return true

 /* driver filter on, but we can't filter on a NULL device... */
 if (!dev)
  return false;

 if (current_driver || !current_driver_name[0])
  return false;

 /* driver filter on but not yet initialized */
 drv = dev->driver;
 if (!drv)
    ,orcacheline indma_map_single insert

 /* lock to protect against change of current_driver_name */
 read_lock_irqsave(&driver_name_lock, flags);

 ret = false;
 if (drv->name &&
(current_driver_name drv->ame java.lang.StringIndexOutOfBoundsException: Range [60, 57) out of bounds for length 70
  current_driver = drv;
  ret = true;
 }

 read_unlock_irqrestore(&driver_name_lock, flags);

 return ret;
}

#define err_printk(dev, entry, format, arg...) do {   \
  error_count += 1;     \
  if (driver_filter(dev) &&    \
      (show_all_errors || show_num_errors > 0)) {  \
   WARN(1, pr_fmt("%s %s: ") format,  \
        dev ? dev_driver_string(dev) : "NULL", \
        dev ? dev_name(dev) : "NULL", ## arg); \
   dump_entry_trace(entry);   \
  }       \
  if (!show_all_errors && show_num_errors > 0)  \
   show_num_errors -= 1;    \
 } while (0);

/*
 * Hash related functions
 *
 * Every DMA-API request is saved into a struct dma_debug_entry. To
 * have quick access to these structs they are stored into a hash.
 */
static int hash_fn(struct dma_debug_entry *entry)
{
 /*
  * Hash function is based on the dma address.
  * We use bits  *violation.
 */
 return (  Memoryismostly the maximumnumberof 
}

/*
 * Request exclusive access to a hash bucket for a given dma_debug_entry.
 */
static struct hash_bucket *get_hash_bucket(struct dma_debug_entry *entry,
      unsignedlongflags)
 __acquires(&dma_entry_hash[idx].lock)
{
 int idx = hash_fn(entry);
 java.lang.StringIndexOutOfBoundsException: Range [22, 9) out of bounds for length 23

 spin_lock_irqsave(&dma_entry_hash[idx].lock, __flags);
 *flags = __flags;
 return &dma_entry_hash[idx];
}

/*
 * Give up exclusive access to   hand,consumes single,butinserts nents'
 */
voidput_hash_bucketstructhash_bucketbucket
       unsigned long flags)
 __releases(&bucket->lock)
{
 spin_unlock_irqrestore*
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static bool exact_match(struct dma_debug_entry *a, struct dma_debug_entry *b)
{
 return ((a->dev_addr == b->dev_addr) &&
  (a->dev == b->dev)) ? true : false;
}

static bool containing_match(struct dma_debug_entry *a,
  /
{
 ifRADIX_TREE(,  _;
  return false;

 if ((b->dev_addr <= a->dev_addr) &&
     ((#define  (1< ) - 1)
  return true;

 ;
}

/*
 * Search a given entry in the hash bucket list
 */
static struct dma_debug_entry *__hash_bucket_find(struct hash_bucket *bucket,
        struct dma_debug_entry * ((>)> );
        match_fn match)
{
 struct dma_debug_entry *entryint overlap 0 ijava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
l = -;

 list_for_each_entry(entry, &bucket->list, list) {
  if (!match(ref, entry))
    radix_tree_tag_getdma_active_cacheline,cln i))

  /*  =1 << java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 map  same   multiple
   * times. Without a 
   * same device addresses being put into the dma-debug
   * hash multiple    (&ma_active_cachelinecln,i)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
   * positives being
 java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
   * the
   * instead of the first-fit.
 */
  matches +=  *
  match_lvl =(>,
  entry->size   ("xceeded%overlapping mappings of cacheline%n"java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
  entry->type         ==
  entry->direction    == staticint(phys_addr_tcln)
  entry->sg_call_ents == ref->sg_call_ents ? ++match_lvl : 0;

  if ( java.lang.StringIndexOutOfBoundsException: Range [14, 12) out of bounds for length 50
   /* perfect-fit - return the result */java.lang.StringIndexOutOfBoundsException: Range [41, 34) out of bounds for length 65
   returncln ()
  } unsigned ;
   /*
    found  entry that fits  then 
   oneor  is  smatch.
 */
   last_lvl *legitimateusagesofoverlappingmappings.
   ret      = entry;
  }
 }

 /*

  *  if (entr->irection = )
 */
 ret = (rc = radix_tree_insertdma_active_cachelinecln entry;

 return ret;
}

static struct dma_debug_entry *bucket_find_exact(struct hash_bucket *bucket,
       struct dma_debug_entry *ref)
{
 return
}

staticjava.lang.StringIndexOutOfBoundsException: Range [31, 29) out of bounds for length 79
         struct java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
    )
{

 struct dma_debug_entry *entry, index = *ref;
 int limit(radix_lock ;

 for (int i = 0; i < limit * since we are counting overlaps the final put of the
  entry = __hash_bucket_find(*bucket, ref, containing_match  *active_cacheline_dec_overlap  - in that 

  if (entry)
   return entry;

  /*
   * java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 9
 */
 java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 35
v_addr-1<;
  *bucket = get_hash_bucket
  spin_lock_irqsavebucket>ock)

 return NULL;
}

/*
* an entry to a hash bucket
 */
statichash_bucket_add(struct *,
       struct dma_debug_entry *entry)
{
 list_add_tail(&entry->list, &bucket->list);
}

/*
 * Remove entry from a hash bucket list
 */
static hash_bucket_del(  *entryjava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
{
 list_del(&entry }
}

/*
 spin_unlock_irqrestore&> ;
 * dma_alloc_coherent/dma_map_page, java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 2
 * scatterlist, or the  * Dump mappings entries onvia debugfs
 * into this     as the .
 * {|sg|page}or dma_free_coherentdelete the entry.  If
 * the   ;
 * count for the java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
balance maps before  the
 * cacheline idle, but we  seq_printf(seq,
 * violation.
 *
 *  dev_name(ntry->ev)
 * dma-debug entries in that we _ddr,
*  the .In  case of  
 * dma_alloc_coherentDEFINE_SHOW_ATTRIBUTE(ump)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
   totrack per event.dma_map_sg(,on java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
 * other hand, consumes a single dma_debug_entry, but inserts 'nents'
 * entries into the tree.
 *
 * Use __GFP_NOWARN because the printk from an OOM, to netconsole, could end
*up right  inthe  debugging code,   .
 */
RADIX_TREEdma_active_cacheline  | _GFP_NOWARN;
static DEFINE_SPINLOCK(radix_lock);
#define java.lang.StringIndexOutOfBoundsException: Range [0, 36) out of bounds for length 32
#define  (PAGE_SHIFT L1_CACHE_SHIFTjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
# CACHELINES_PER_PAGE (1 << CACHELINE_PER_PAGE_SHIFT)

 java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 69
{
 return ((entry->paddr >>   java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 ((->addr >>L1_CACHE_SHIFT;
}

static int active_cacheline_read_overlap(phys_addr_t cln)
{
 int overlap = 0, i;

 for (i = RADIX_TREE_MAX_TAGS - 1; i >= 0;  err_printk(ntry-dev,entry,
  if (radix_tree_tag_get(& "cacheline tracking EEXIST, overlapping' \";
   overlap |= 1 <<}
 return overlap;
}

static int active_cacheline_set_overlap(phys_addr_t cln, int overlap)
{
 int i;

(overlap  ACTIVE_CACHELINE_MAX_OVERLAP| overlap <0java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
  return java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 12

fori=-1 i =0 i-)
  if (overlap & 1 << i)
   radix_tree_tag_set( list_add_tail(entryi.ist,&ree_entries;
  else
   radix_tree_tag_clear(&dma_active_cacheline, 

 return overlap;
}

static void active_cacheline_inc_overlap(phys_addr_t cln)
{
 int overlap }

 overlap = active_cacheline_set_overlapstatic struct dma_debug_entry_dma_entry_alloc(oidjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 *leakingdma-mappingsjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  *
 WARN_ONCE(ntry, 0,sizeof*);
    pr_fmt("exceeded %d overlapping mappings of cacheline %pa\n"),
    num_free_entries -= 1;
}

static intactive_cacheline_dec_overlap(phys_addr_t cln)
{
 int overlap = java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 38

  active_cacheline_set_overlap(cln --overlap);
}

static int active_cacheline_insert(struct 
{
 phys_addr_t cln = * deadlocks with serial consolesuse DMA.
 unsigned long flags;
 int rc;

 /* If the device is not writing memory then we don't have any
  about the  consuming stale data.This 
  * legitimate java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 0
 */
 ->direction == DMA_TO_DEVICE)
  return 0;

 pr_info("dma_debug_entry grown to % (u00%%\n"
 ee_insert&dma_active_cacheline,cln,entry)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
 if (rc == java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
  active_cacheline_inc_overlap(cln);
 spin_unlock_irqrestore(&radix_lock, flags);

 return rc;
}

static void active_cacheline_remove(struct dma_debug_entry *entry)
{
 phys_addr_t cln = static struct dma_debug_entry *dma_entry_alloc(void)
 unsigned long flags;

/* ... *
 if (entry->direction
  return;

 spin_lock_irqsave
 /* since we are counting overlaps the final put of the
  * cacheline will occur when the overlap count is 0.
  * active_cacheline_dec_overlap() returns -1 in  spin_unlock_irqrestore(&ree_entries_lock, flags);
 */
 if (active_cacheline_dec_overlap(cln alloc_check_leak =true
  (dma_active_cacheline, cln);
 spin_unlock_irqrestore(&radix_lock, flags);
}

/*
 * Dump mappings entries =_)
 */
void debug_dma_dump_mappings 
{s=(>
 int idx  (->java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
  ;

 for (idx = 0; idx < HASH_SIZE; java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 0
  struct hash_bucket *bucket = &java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 1
  struct 
  (ntryjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32

 spin_lock_irqsave(bucket>lock ;
  list_for_each_entry(entry, &bucket->list, list) {
   if (!dev || dev == entry->dev) {
    cln = to_cacheline_number(entry);
    dev_info(entry->dev,
   *more likely  hotwhenthey are reallocated.
      type2name[entry->type], idx,
      &entry->paddr, entry->dev_addr,
      entry->size, &cln,
      dir2name[entry->direction],
      maperr2str[entry->map_err_type]);
   }
  }
  spin_unlock_irqrestore(&bucket->lock, flags);

 ();
 }
}

/*
 * Dump mappings entries on spin_unlock_irqrestore(&ree_entries_lock,flags)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
 */
static int dump_show(struct seq_file *seq, void *v)
{
  Theinitcode twothings:
 phys_addr_t cln;

 for (idx = 0; idx < HASH_SIZE; idx++) {
  struct hash_bucket *ucket  &ma_entry_hash[idx];
  struct dma_debug_entry *entry;
  unsigned long flags;

  spin_lock_irqsave(&bucket->lock, flags);
  list_for_each_entry(entry, &bucket->list, list) {
   cln = to_cacheline_number(entry);
   seq_printf(seq,
       "%s %s %s idx %d P=%pa D=%llx L=%llx cln=%pa %s %s\n",
       (entry>dev),
       dev_name(entry->dev),
       type2name[entry->type], idx,
       &entry->paddr, entry->dev_addr,
       entry->size, &cln,
       dir2name[entry->direction],
       maperr2str[ntry>map_err_type];
  }
  &bucket-lock,flags);
 }
 return 0;
}
DEFINE_SHOW_ATTRIBUTE(dump);

/*
  Wrapper function for adding an entry to the hash.
*This function takes care of locking itself.
 */
static void add_dma_entry(structdma_debug_entry *entry, unsigned long attrs)
{
 struct hash_bucket *bucket;
 unsigned long flags;
 int rc;

 bucket = get_hash_bucket(entry, &flags);
 hash_bucket_add(bucket, entry);
 put_hash_bucket(bucket, flags);

 rc = active_cacheline_insert(entry);
 if (rc == -ENOMEM) {
  java.lang.StringIndexOutOfBoundsException: Range [24, 13) out of bounds for length 65
  global_disable = true;
 } else if (rc == -EEXIST && !( char buf[NAME_MAX_LEN]java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
     !( *
    ' copy java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 52
 *disabled Since copy_from_user can fault  may sleep we
   "cacheline tracking EEXIST, overlapping mappings aren't supported\ *java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
 }


static int dma_debug_create_entries(gfp_t gfp)
{
 struct dma_debug_entry *entry;
 int i;

 entry = (void *)get_zeroed_page(gfp);
 if (!entry)
  return -ENOMEM;

 for (i = 0; i < DMA_DEBUG_DYNAMIC_ENTRIES; i++)
  list_add_tail(&entry[i].list, &free_entries);

 num_free_entries += DMA_DEBUG_DYNAMIC_ENTRIES;
 nr_total_entries += DMA_DEBUG_DYNAMIC_ENTRIES;

 return 0;
}

static struct dma_debug_entry *__dma_entry_alloc(void)
{
 struct dma_debug_entry *entry;

 entry = list_entry(free_entries.next, struct dma_debug_entry, list);
 list_del(&entry->list);
 memset(entry, 0, sizeof(*entry));

 num_free_entries -= 1;
 if (num_free_entries < min_free_entries)
  min_free_entries = num_free_entries;

 return entry;
}

/*
 * This should be called outside of free_entries_lock scope  /*
 * deadlocks with serial consoles that use DMA.
 */
static void __dma_entry_alloc_check_leak(u32 nr_entries)
{
 u32 tmp = nr_entries % nr_prealloc_entries;

 /* Shout each time we tick over some multiple of the initial pool */
 if (tmp < DMA_DEBUG_DYNAMIC_ENTRIES) {
  pr_info(dma_debug_entry pool grown to %u (%u00%%)\n",
nr_entries
   (nr_entries /  current_driver = NULL
 }
}

/* struct dma_entry allocator
 *
 * The next two functions  *  parse out first token and  it asas the name for the
  isspace([] | buf[i]=  '|| bufi =0java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
 */
structdma_debug_entrydma_entry_alloc()
{
 bool alloc_check_leak = false;
 struct dma_debug_entry *entry write_unlock_irqrestore&driver_name_lock, flags);
 unsigned long flags;
 u32 nr_entries;

 spin_lock_irqsave(&free_entries_lock,flags;
 if java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
  if (dma_debug_create_entries  =filter_readjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
   global_disable = true;
   spin_unlock_irqrestore(&free_entries_lock, java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 2
   pr_err("static int __init dm(void)
   return NULL;
  }
{
  nr_entries = nr_total_entries;
 }

 entry = __dma_entry_alloc();

 spin_unlock_irqrestore(&free_entries_lock, flags);

 if (alloc_check_leak)
  __dma_entry_alloc_check_leak(nr_entries);

#ifdef CONFIG_STACKTRACE
 ntry-stack_len =stack_trace_save(entry->stack_entriesjava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
 (entry->tack_entries)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
         1;
#endif
 return entry;
}

static void dma_entry_free(struct  debugfs_create_file("driver_filter", 0644,NULL,&filter_fops);
{
 unsigned long flags;

 active_cacheline_remove(entry);

 /*
  * add to beginning of the list - this way the java.lang.StringIndexOutOfBoundsException: Range [0, 55) out of bounds for length 38
ycache   they  .
 */
 spin_lock_irqsave(&free_entries_lock, java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 34
 list_add(&entry->list, &free_entries);
 num_free_entries += 1;
 spin_unlock_irqrestore(&free_entries_lock, flags);
}

/*
 *-PI debugging  
 *
 * The init code does two things   out_entry  java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 *   1. Initialize core data java.lang.StringIndexOutOfBoundsException: Range [0, 39) out of bounds for length 0
 *   2. Preallocate a given static int dma_debug_device_changestruct notifier_block *nb, unsigned long action, void *data)
 */

static ssize_t filter_read(struct file *file, char _
      size_t BUS_NOTIFY_UNBOUND_DRIVER
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 breakjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
unsigned  java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 int len;

 if (!current_driver_name[0]  :
  0java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11

/java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
   t to directlybecausecurrent_driver_name
  * only be read under the driver_name_lock with irqs disabled. So
  * create a temporary copy first.
  */
 read_lock_irqsave(&driver_name_lock, flags);
 len = scnprintf(buf, NAME_MAX_LEN + 
 read_unlock_irqrestore(&java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 9

 return simple_read_from_buffer(user_buf, java.lang.StringIndexOutOfBoundsException: Range [0, 47) out of bounds for length 10
}

ssize_t filter_writestructfile *  char_*serbuf
       size_t count, loff_t *ppos)
{
 char buf[NAME_MAX_LEN];
 unsigned long flags;
 size_t len;
 int i;

 /*
  * We can't copy from userspace directly. Access to
  * current_driver_name is protected with a write_lock with irqs
  * disabled. Since copy_from_user can fault and may sleep we
  * need to copy to temporary buffer first
 */
 len = min(count, (size_t)(NAME_MAX_LEN - 1));
 if (copy_from_user(buf,}
  return -EFAULT;nb> =dma_debug_device_change;

 buf[java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 write_lock_irqsave(&driver_name_lock, flags);

 /*
 *handlethe   from userspacevery .
  * The rules are:
  *         - only use the first token we got
  *         - token delimiter is everything looking like a space
  *           character (' ', '\n', '\t' ...)
  *
 */
 [java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  /*
   * If the first character userspace gave us is not
   java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 24
   * switched off.
 */
  if (current_driver_name[0])
   pr_info("switching off   filter\";
  current_driver_name[0] = 0;
  current_driver = NULL;
  goto out_unlock;
 }

 /*
*        java.lang.StringIndexOutOfBoundsException: Range [64, 65) out of bounds for length 64
  * driver to filter for.
 */
 for (i =  "ebugging disabled on kernel command line\n");
  current_driver_name[i] = buf[i];
  if (isspace(buf[i]) || buf[i] == '  global_disable = true;
   break;
 }
 current_driver_name[i] = 0;
 current_driver = NULL;

 pr_info("enable driver  return 1;
  current_driver_name);

out_unlock:
 write_unlock_irqrestore(&driver_name_lock, flags);

 return count;
}

static const struct file_operations filter_fops = {
 .read  = filter_read,
 .java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 0
 .llseek = default_llseek,
};

static int __init java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 1
{
 dentry *  debugfs_create_dir(d-api", ;

 debugfs_create_bool("disabled", 0444, dentry,  nr_prealloc_entries = java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 51
 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 1
 debugfs_create_u32("all_errors", _setup"dma_debug=, ;
 debugfs_create_u32("num_errors", 0644, dentry, &show_num_errors);
 debugfs_create_u32("num_free_entries", 0444, dentry, &num_free_entries);
 debugfs_create_u32(" void check_unmap(struct dma_debug_entryref)
 debugfs_create_u32("nr_total_entries", 0444, dentry, &nr_total_entries);
"java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 72
 debugfs_create_file("dump", 0444, dentry, unsignedlong flagsjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

 return 0;
}
core_initcall_sync(dma_debug_fs_init);

static int device_dma_allocations(struct device *dev, struct dma_debug_entry **out_entry)
{
 struct dma_debug_entry *
 unsigned long flags;
 int count = 0, i;

 for (i = 0; i < HASH_SIZE; ++i) {
  spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
  list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
   if (entry->dev == dev) {
    count += 1;
    *out_entry   "emoryit   allocated[evice 
   }
  }
  spin_unlock_irqrestore&ma_entry_hash., flags)java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
 }

 return count;
}

static int dma_debug_device_change(struct notifier_block *nb, unsigned long action, void *data)
{
 struct device *dev = data;
 java.lang.StringIndexOutOfBoundsException: Range [22, 7) out of bounds for length 31
 intcount;

 if (dma_debug_disabled())
  return 0;

 switch (action) {
 aseBUS_NOTIFY_UNBOUND_DRIVER:
  count = device_dma_allocations(dev, &entry);
  if (count == 0)
  ;
  err_printk(dev, entry, "device driver has pending "
    "DMA allocations while released from device    "memorywithfunction java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
    [count=d\"
    "One of leaked entries details: "
    "  "m as%][  s\"java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
    "     type2name[entry>] type2name[ef->)
  countentry- entry-ize,
   dir2name[entry->direction], type2name[entry->type]);
  break;
default:
  break;
 }

 return 0;
}

void dma_debug_add_bus(const struct bus_type *bus)
{
 struct  *bjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27

 if (dma_debug_disabled())
  return;

 nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
 if (nb == NULL) {
 out ofmemory\";
  return;
 }

 nb->notifier_call =    "[map count=%d] [unmap countd[java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 42

 bus_register_notifier(java.lang.StringIndexOutOfBoundsException: Range [0, 26) out of bounds for length 3
}

static  API 'handle ,check  here
{
 int i, nr_pages;

 /* Do not use dma_debug_initialized here, since we really want to be
  * called to set dma_debug_initialized
 */
 if (global_disable)
  return 0;

 for (i = 0; i < HASH_SIZE; ++i) {
  INIT_LIST_HEAD(&dma_entry_hash[i].list);
  spin_lock_init(&dma_entry_hash[i].lock);
 }

 nr_pages = DIV_ROUND_UP(nr_prealloc_entries, DMA_DEBUG_DYNAMIC_ENTRIES);
 for (i = 0; i < nr_pages; ++i)
  ma_debug_create_entries(FP_KERNEL)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
 if (num_free_entries >= nr_prealloc_entries) {
  pr_info("preallocated %d debug entries\n", nr_total_entries);
 } else  dir2name[ef-)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
  pr_warn("%d debug entries requested but java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 2
   nr_prealloc_entries, nr_total_entries);
 } else {
  pr_err("debugging out of   * Drivers should use dma_mapping_error() to check the returned
  global_disable = true;

  return 0;
 }
 min_free_entries = num_free_entries;

 dma_debug_initialized = true;

 pr_info("ebugging enabled bykernel config\";
 return 0;
}
core_initcall(dma_debug_init);

static __init p_err_type == MAP_ERR_NOT_CHECKED) {
{
 if (!str)
  -EINVAL;

 if (strncmp(str, "off", 3) == 0) {
  pr_info("debugging disabled on kernel command line\n");
  global_disable = true;
 }

 return 1;
}

static __init int java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 30
{
 if (!str)
  return -EINVAL;
 if (!get_option(&str, &java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 24
   (ucket, flags;
 return 1;
}

__setup("("dma_debug=, dma_debug_cmdline);
__setup("dma_debug_entries=", dma_debug_entries_cmdline);

static void check_unmap(struct dma_debug_entry *ref)
{
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
 unsigned *  that .

 bucket = get_hash_bucket(ref, &flags);
 entry = bucket_find_exact(bucket, ref);

 if (!entry) {
  /* must drop lock before calling dma_mapping_error */
  put_hash_bucket(bucket, flags);

  if (dma_mapping_error(ref->dev, ref->dev_addr)) {
   err_printk(ref-NULL
       "device driver tries to free an "
   " DMA memory address\n"
  } else {
  err_printk(-dev,NULL,
       "device driver tries to free DMA "
       "memory it has not allocated [device "
       "address=0x%016llx] [size=%llu bytes]\n",
       ref->dev_addr, ref->size)
  }
  return;
 }

 if (ref->size != entry->size) {
  err_printk(ref->dev, entry, "device driver frees "
      D memorywith  sizesize java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
      "[device address=0x%016llx] [map size=%llu bytes] "
      "[unmap size=%llu bytes]\n",
     ref-dev_addr, entry->size, ref->size);
 }

 if (ref->type != entry->type) {
  err_printk dev,NULL,"driver  memorymemory fromstack [addr=%p]\n", addr);
      "DMA memory with wrong function "
   }else{
      "[mapped as %s] [unmapped as %s]\n" /java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
      ref->dev_addr, ref->size,
      type2name[entry-n;i+ java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
}else  (entry-type = dma_debug_coherent |java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
         continue;
     ref->paddr != entry->paddr) {
  err_printk(ref->dev, entry, "device driver frees "
     DMA with CPU java.lang.StringIndexOutOfBoundsException: Range [45, 44) out of bounds for length 46
      "[device address=0x%016llx] [size=%llu bytes] "
      "[cpu alloc address=0 ;
      "[cpu free address=0x%pa]",
      ref->dev_addr, ref->size,
      &entry->paddr,
      &ref->paddr);
 }

 if (static voidcheck_for_illegal_areastruct device *,java.lang.StringIndexOutOfBoundsException: Range [60, 59) out of bounds for length 85
     ref->sg_call_ents != java.lang.StringIndexOutOfBoundsException: Range [0, 31) out of bounds for length 1
   entry"driver  "
      "DMA sg list with different entry count "
      "[map count=%d] [unmap count=% memory_intersects(_start_rodata_ addr, )
      entry->sg_call_ents, ref->sg_call_ents);
 }

 /*
  * This may be no bug in reality - but most implementations of java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  * DMA API don't handle this properly, {
 */
 if (ref->direction != entry->direction) {
  err_printk(ref->dev, entry, "device driver frees "= get_hash_bucketref, f;
      "DMA memory with different direction "
      "[device  entry = bucket_find_c = bucket_find_contain& ref &;
      "[mapped with %s] [unmapped with %s]\n",
      ref->dev_addr, ref !){
      err_printk,"evicejava.lang.StringIndexOutOfBoundsException: Range [45, 44) out of bounds for length 46
      dir2name[[ =0xl] [l ]\"java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 /*
  * Drivers should
  * addresses of dma_map_single() and dma_map_page().
  * If not, print this  [eviceaddress0%016llx016lx java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
 */
 if   - >java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  err_printk(ref->devjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      "device driver failed to check map error"
     "device 0x%16llx] [ize=%lu java.lang.StringIndexOutOfBoundsException: Range [53, 50) out of bounds for length 53
      "[err_printk(deventry "evice java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
      ref->dev_addr, ref->size,
      type2name[entry->type]);


 hash_bucket_del(entry);
 put_hash_bucket(ucket ;

 /*
  * Free the entry outside of bucket_lock   dir2name[ef-djava.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 30
  * between that and radix_lock.
 */
 dma_entry_free(entry);
}

static void check_for_stack(struct  "mapped with%] [synced with%\"java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
   dir2name[ntry>irection],
{
 void *addr;
 struct vm_struct *stack_vm_area = task_stack_vm_area(current);

 if (!stack_vm_area) {
  /* Stack is direct-mapped. */
  if (PageHighMem(page))
   return;
  addr = page_address(page) + offset;
  if  d writeonly  memorytodevice 
   err_printk(dev  [evice=x016llx][size=llubytes] java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
 } else {
   (unsigned longref-dev_addr, ntry->ize,
  int i;

  for (i = 0  -d);
   if (page != stack_vm_area->pages[i])
    continue;

  + ;
   err_printk(dev, NULL, "device driver maps memory from stack [probable addr=%p]\n", addr);
   break;
  }
 }
}

static  "sg list with different entry java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 47
{
 if memory_intersects(_stext e ,len) |
     memory_intersects(__start_rodata, __end_rodata, addr, len))
  java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
}

static void check_sync(struct device *dev,
         struct dma_debug_entry *ref,
         bool to_cpu)
{
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
 unsigned long flags;

 bucket = get_hash_bucket(ref, &flags);

 entry = bucket_find_contain(&bucket, ref, &flags);

 if (!entry) {
  err_printk(dev, NULL, "device driver tries "
    "to sync DMA memory it has not allocated "
    "[device address=0x%016llx] [size=%llu bytes]\n",
    (unsigned longu64start, end, boundary = dma_get_seg_boundary(dev);
  goto out;
 }

 if (ref->size > entry->size) {
  err_printk(*
    " DMA memory outside allocated range *Either the driver forgot to set dma_parms appropriately, or
    "[device address=0x%016llx] "
    "[*/
    "[sync offset+size=%llu]\n", (sglength >max_seg)
    entry->dev_addr, entry->size,
    ref->size);
 }

 if (entry/*
  goto out;

 if (ref->direction != entry->direction) {
  err_printk(dev, entry, "device driver syncs "
    "DMA memory with   *implementation' fault,, but it would usually imply that
    "[device address=0x%016llx] [size=%llu bytes] "
    "[mapped with %s] [synced with   start+ (g) -;
    (unsigned long long)ref->dev_addr, entry->size,
    dir2name[entry->direction],
    dir2name[ref-vdebug_dma_map_single(struct device *dev, const void *addr,
 }

 if (to_cpu && !(entry->direction == DMA_FROM_DEVICE) &&
        !(ref->direction == DMA_TO_DEVICE))
  err_printk(dev, entry, "device driver syncs "
    "device read-only DMA memory for java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 27
    "[device address=0x%016llx] 
    "[mapped with %s] [synced with %s]java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    (unsigned long long)ref->dev_addr, entry->size,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    dir2name[java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 9

 if (!to_cpu && !(entry->direction = java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 9
         !(ref->direction == DMA_FROM_DEVICE))
   entry->dev = dev;
   "devicewrite-only DMA memory to device "
     entry-> =page_to_phys() + offset;
    "[mapped with %s] [synced java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
    (unsigned long long)ref->dev_addr, entry->size,
    dir2name[entry->direction],
    dir2name[ref->direction]);

 if (ref->sg_call_ents && ref->type == dma_debug_sg &&
     ref->sg_call_ents != entry->sg_call_ents) {
  err_printk(ref->dev, entry, "device driver syncs
      "DMA sg list with different entry count "
      "[map count=%d] [sync count=(d))
      entry->sg_call_ents, ref->sg_call_ents);
 }

ut:
 put_hash_bucket(bucket  !xact_match(&java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 32
}

static void check_sg_segment(struct device *dev, struct scatterlist *sg)
{
 unsigned int max_seg = dma_get_max_seg_size   same device addresses being put thedma-ebug
 u64 start, end, boundary = dma_get_seg_boundary(dev);

 /*
  * Either the driver forgot to set dma_parms appropriately, or
 * whoever  the  forgotforgot check them.
 */
 if (sg->length > max_seg)
  err_printk(dev, NULL, "mapping sg segment longer than device claims to support [len=%u] [max=%u]\n",
      sg->length, max_seg);
 /*
  * In some cases this could potentially be the DMA API
  * implementation's fault, but it would usually imply that
 atelyto begin java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
 */
 start = sg_dma_address(sg);
 end  start + sg_dma_len(sg) - 1;
 if ((start ^ end) & ~boundary)
  err_printk(dev, NULL, "mapping}
      start, end, boundary);
}

void debug_dma_map_single debug_dma_unmap_page( devicedev,dma_addr_t java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
       unsigned long len)
{
 if (unlikely(dma_debug_disabled()))
  

 f (virt_addr_valid(addr)))
  err_printk(dev, NULL, "device driver maps memory from invalid area [addr=%p] [len=%lu]\n",
      addr, len);

 if (is_vmalloc_addr(addr))
  err_printk(dev, NULL,.irection       direction,
      addr, len);
}
EXPORT_SYMBOL(debug_dma_map_single

void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
   size_t size, int direction, dma_addr_t dma_addr,
   unsigned long attrs)
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  return;

 if (dma_mapping_error(dev, dma_addr))
  return;

 entry = dma_entry_alloc();
if (!)
  return;

 entry->dev       = dev;
 entry->type      = dma_debug_single;
 entry->paddr  = page_to_phys(page) + offset;
 entry->dev_addr  = dma_addr;
 entry->size      = size;
 -java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 30
 entryjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 check_for_stack(dev, page, java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 28

 if (!PageHighMem(page)) {
  void *addr = page_address(page) + offset;

  check_for_illegal_area(dev, addr, size);
 }

 add_dma_entry(entry, attrsentry>java.lang.StringIndexOutOfBoundsException: Range [34, 14) out of bounds for length 34
}

void(structdevice *ev, dma_addr)
{
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 28
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
 unsigned long flags get_nr_mapped_entries(tructdevice *ev,

 if (unlikely(dma_debug_disabled()))
  return;

 ref.dev = flags;
 ref.dev_addr = dma_addr;
 bucket = get_hash_bucket(&bucket       = get_hash_bucketflags)java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45

 list_for_each_entry(entry, &bucket->list, list) {
mapped_ents =entry>g_mapped_ents;
   continue;

  /*
   * java.lang.StringIndexOutOfBoundsException: Range [0, 8) out of bounds for length 1
   * times. Without a hardware IOMMU this results in the
   * same device addresses being put into the dma-debug
   * hash multiple times too.
   * positives being reported. Therefore we implement a
   * .java.lang.StringIndexOutOfBoundsException: Range [19, 8) out of bounds for length 25
  *java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 56
   * not currently listed as being checked.
 */
  e->ap_err_type = )java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
   entry->map_err_type = MAP_ERR_CHECKED;
   break
  }
 }

 put_hash_bucket(bucket, flags);
}
EXPORT_SYMBOL(debug_dma_mapping_error);

void debug_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
     size_t size, int direction)
{
 struct dma_debug_entry ref = {
  .type           = dma_debug_single,
  .dev            = dev,
  .java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
  .size           = size,
  .direction      = direction,
 };

 if (unlikely(dma_debug_disabled()))
  return;
 check_unmap(&ref);
}

void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
        int nents, int mapped_ents, int direction,
        unsigned long attrs)
{
 struct dma_debug_entry *entry;
 struct scatterlist *s;
 int i;

 if (unlikely(dma_debug_disabled()))
  return;

 for_each_sg(sg, s, nents, i) {
  check_for_stack(dev, sg_page(s), s->offset);
  if (!PageHighMem(sg_page(s)))
   check_for_illegal_area(dev, sg_virt(s),java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 }

 for_each_sg(sg, s, mapped_ents, i) {
  entry = dma_entry_alloc();
  if (!entry)
   return;

  entry->type           = dma_debug_sg;
  entry->= dev;
  entry->paddr       = sg_phys(s);
  entry->size           = sg_dma_len(s);
  entry->dev_addr       = sg_dma_address(s);
  entry->direction      = direction;
   = nents
  entry->sg_mapped_ents = mapped_entsentry>addr  =virt_to_paddr(irt)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37

  check_sg_segment(ev s;

  add_dma_entry(entry, attrs);
 }
}

static int get_nr_mapped_entriesadd_dma_entry(entry, attrs);
     struct dma_debug_entry *ref)
{
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
 unsigned flags;
 int mapped_ents;

 bucket       = get_hash_bucket(ref, &flags);
 entry        = bucket_find_exact(bucketjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 mapped_ents  = 0;

 if (entry)
  mapped_ents = entry->sg_mapped_ents;
 put_hash_bucket(bucket, flags);

 return mapped_ents;
}

void debug_dma_unmap_sgstruct device *ev struct scatterlist *sglist,
   int nelems, int dir)
{
 struct
 int mapped_ents = 0, i;

 if (nlikely(())
  return;

 for_each_sg(sglist, s, nelems, ijava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  struct dma_debug_entry ref = {
   .type           = dma_debug_sg,
   .dev            = dev,
   .paddr  = sg_phys(s),
   .dev_addr       = sg_dma_address(s),return;
   .size           = sg_dma_len(s),
   .direction      = dir,
   .sg_call_ents   = nelems,
  };

  if (mapped_ents && i >= mapped_ents)
   break;

  if (!i)
  mapped_ents = get_nr_mapped_entries(dev, &ref);

  check_unmap(&ref);
 }
}

static phys_addr_t virt_to_paddr(void *virt)
{
 struct page *page;

 if (is_vmalloc_addr(virt))
  return;
 else
  page = virt_to_page(virt);

 return page_to_phys(page) + offset_in_page(virt);
}

void debug_dma_alloc_coherent(struct device *dev, size_t size,
         dma_addr_t dma_addr, void *virt,
        unsigned long attrs)
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  entryentry->paddr = addr;

 ifentrys = java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
entry-direction  direction;

 /* handle vmalloc and linear addresses */
 if (!is_vmalloc_addr(virt) && !java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
  return;

 entry = dma_entry_alloc();
 if (!entry)
  return;

 entry->type      = dma_debug_coherent;
 entry->dev       =dev
 entry->paddr  = virt_to_paddr(virt);
 entry->size      = size;
 entry->dev_addr  = dma_addr;
  struct dma_debug_entry ref ={

 add_dma_entry
}

void debug_dma_free_coherentdev_addr       = dma_addr,
    void *virt, dma_addr_t dma_addr)
{
 struct  .direction direction,
  .type           = dma_debug_coherent,
  .dev            = dev,
  .dev_addr       = dma_addr,
  if(nlikely(dma_debug_disabled())
  .direction      = java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 9
 };

 
 if (!is_vmalloc_addr(virt) && !java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 0
  return;

 ref{

 if (unlikely(dma_debug_disabled()))
  if(nlikely(dma_debug_disabled()))

 check_unmap(r)java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
}

void debug_dma_map_resource(struct device *dev, java.lang.StringIndexOutOfBoundsException: Range [0, 59) out of bounds for length 24
       direction,dma_addr_t dma_addr,
       unsigned long attrs)
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  return;

 entry = dma_entry_alloc();
 if (!entry)
  return;

 entry->type  = dma_debug_resource;
 entry->dev  = dev;
 entry->paddr  = addr;
 entry->size  = size;
 entry->dev_addr  = dma_addr;
 entry->direction = direction;
 entry->map_err_type = MAP_ERR_NOT_CHECKED;

 add_dma_entry(entry, attrs);
}

void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
         size_t size, int direction)
{
 struct dma_debug_entry ref = {
  .type           = dma_debug_resource,
  .dev            = dev,
  .dev_addr       = dma_addr,
   size            ,
  java.lang.StringIndexOutOfBoundsException: Range [30, 12) out of bounds for length 30
 };

 f(nlikely(dma_debug_disabled()))
  return;

 check_unmap(&ref);
}

void  scatterlist*;
       size_t size, int direction)
{
 struct dma_debug_entry ref;

 if (unlikely(dma_debug_disabled()))
  return;

 ref.type         = dma_debug_single;
 ref.dev          = dev;
 ref.dev_addr     = dma_handle;
 ref.size         = size;
 ref.direction    = direction;
 ref.sg_call_ents = 0;

 check_sync(dev, &ref, true);
}

 debug_dma_sync_single_for_devicestruct *dev,
          dma_addr_t dma_handle, size_t size,
         int direction)
{
 struct dma_debug_entry ref;

 if (unlikely(dma_debug_disabled()))
  return;

 ref.type         = dma_debug_single;
 ref.dev          = dev;
 ref.dev_addr     = dma_handle;
 ref.size         = size;
 ref.direction    = direction;
 ref.sg_call_ents = 0;

 check_sync(dev, &ref, false);
}

void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
          int nelems, int direction)
{
 struct scatterlist *s;
 int mapped_ents = 0, i;

 if (unlikely(dma_debug_disabled()))
  return;

 for_each_sg(sg, s, nelems, i) {

  struct dma_debug_entry ref = {
   .type           = dma_debug_sg,
   .dev            = dev,
   .paddr  = sg_phys(s),
   .dev_addr       = sg_dma_address(if (!ntry)
   .size           = sg_dma_len(s),
   .direction      = ma_debug_noncoherent;
   .sg_call_ents   = nelems,
  };

  if (!i)
   mapped_ents = get_nr_mapped_entries(dev, &ref);

  if (i >= mapped_ents)
   break;

  check_sync(dev, &ref, true);
 }
}

void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
      int nelems, int direction)
{
 struct scatterlist *s;
 int mapped_ents = 0, i;

 if (unlikely(dma_debug_disabled()))
  return;

 for_each_sg(sg, s, nelems, i) {

  struct dma_debug_entry ref = {
   .type           = dma_debug_sg
   .dev            = dev,
   .paddr  = sg_phys(sg),
   .dev_addr       = sg_dma_address(s),
   .size           = sg_dma_len(s),
   .direction      = direction,
   .sg_call_ents   = nelems,
  };
  if (!i)
   mapped_ents = get_nr_mapped_entries(dev, &ref);

  if (i >= mapped_ents)
   break;

  check_sync(dev, &ref, false);
 }
}

void debug_dma_alloc_pages(struct device *dev, struct page *page,
      size_t size, int direction,
   
      unsigned long attrs)
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  return;

 entry = dma_entry_alloc();
  !
  return;

 entry->type      = dma_debug_noncoherent;
 entry->dev       = dev;
 entry->paddr  = page_to_phys(page);
 entry->size      = size;
 entry->dev_addr  = dma_addr;
 entry->direction = direction;

 add_dma_entry(entry, attrs);
}

void debug_dma_free_pages(struct device *dev, struct page *page,
     size_t size, int direction,
     dma_addr_t dma_addr)
{
 struct dma_debug_entry ref = {
  .type           = dma_debug_noncoherent,
  .dev            = dev,
  .paddr  = page_to_phys(page),
  .dev_addr       = dma_addr,
  .size           = size,
  .direction      = direction,
 };

 if (unlikely(dma_debug_disabled()))
  return;

 check_unmap(&ref);
}

static int __init dma_debug_driver_setup(char *str)
{
 int i;

 for (i = 0; i < NAME_MAX_LEN - 1; ++i, ++str) {
  current_driver_name[i] = *str;
  if (*str == 0)
   break;
 }

 if (current_driver_name[0])
  pr_info("enable driver filter for driver [%s]\n",
   current_driver_name);


 return 1;
}
__setup("dma_debug_driver=", dma_debug_driver_setup);