Quelle  debug.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008 Advanced Micro Devices, Inc.
 *
 * 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 <linux/spinlock.h>
#include <linux/vmalloc.h>
#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   13
#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 dma_debug_entry))

enum {
 dma_debug_single,
 dma_debug_sg,
 dma_debug_coherent,
 dma_debug_resource,
 dma_debug_noncoherent,
};

enum map_err_types {
 MAP_ERR_CHECK_NOT_APPLICABLE,
 MAP_ERR_NOT_CHECKED,
 MAP_ERR_CHECKED,
};

#define DMA_DEBUG_STACKTRACE_ENTRIES 5

/**
 * struct dma_debug_entry - track a dma_map* or dma_alloc_coherent mapping
 * @list: node on pre-allocated free_entries list
 * @dev: 'dev' argument to dma_map_{page|single|sg} or dma_alloc_coherent
 * @dev_addr: dma address
 * @size: length of the mapping
 * @type: single, page, sg, coherent
 * @direction: enum dma_data_direction
 * @sg_call_ents: 'nents' from dma_map_sg
 * @sg_mapped_ents: 'mapped_ents' from dma_map_sg
 * @paddr: physical start address of the mapping
 * @map_err_type: track whether dma_mapping_error() was checked
 * @stack_len: number of backtrace entries in @stack_entries
 * @stack_entries: stack of backtrace history
 */
struct dma_debug_entry {
 struct list_head list;
 struct device    *dev;
 u64              dev_addr;
 u64              size;
 int              type;
 int              direction;
 int   sg_call_ents;
 int   sg_mapped_ents;
 phys_addr_t  paddr;
 enum map_err_types  map_err_type;
#ifdef CONFIG_STACKTRACE
 unsigned int stack_len;
 unsigned long stack_entries[DMA_DEBUG_STACKTRACE_ENTRIES];
#endif
} ____cacheline_aligned_in_smp;

typedef bool (*match_fn)(struct dma_debug_entry *, struct dma_debug_entry *);

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 __read_mostly;

static inline bool dma_debug_disabled(void)
{
 return global_disable || !dma_debug_initialized;
}

/* Global error count */
static u32 error_count;

/* Global error show enable*/
static u32 show_all_errors __read_mostly;
/* 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 char                  current_driver_name[NAME_MAX_LEN] __read_mostly;
static struct device_driver *current_driver                    __read_mostly;

static DEFINE_RWLOCK(driver_name_lock);

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

static const char *type2name[] = {
 [dma_debug_single] = "single",
 [dma_debug_sg] = "scatter-gather",
 [dma_debug_coherent] = "coherent",
 [dma_debug_resource] = "resource",
 [dma_debug_noncoherent] = "noncoherent",
};

static const char *dir2name[] = {
 [DMA_BIDIRECTIONAL] = "DMA_BIDIRECTIONAL",
 [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
 * here because all these variables are exported to debugfs. Some of them even
 * writeable. This is also the reason why a lock won't help much. But anyway,
 * the races are no big deal. Here is why:
 *
 *   error_count: the addition is racy, but the worst thing that can happen is
 *                that we don't count some errors
 *   show_num_errors: the subtraction is racy. Also no big deal because in
 *                    worst case this will result in one warning more in the
 *                    system log than the user configured. This variable is
 *                    writeable via debugfs.
 */
static inline void dump_entry_trace(struct dma_debug_entry *entry)
{
#ifdef CONFIG_STACKTRACE
 if (entry) {
  pr_warn("Mapped at:\n");
  stack_trace_print(entry->stack_entries, entry->stack_len, 0);
 }
#endif
}

static bool driver_filter(struct device *dev)
{
 struct device_driver *drv;
 unsigned long flags;
 bool ret;

 /* driver filter off */
 if (likely(!current_driver_name[0]))
  return true;

 /* driver filter on and initialized */
 if (current_driver && dev && dev->driver == current_driver)
  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)
  return false;

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

 ret = false;
 if (drv->name &&
     strncmp(current_driver_name, drv->name, NAME_MAX_LEN - 1) == 0) {
  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 20-27 here as the index into the hash
 */
 return (entry->dev_addr >> HASH_FN_SHIFT) & java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 2
}include/

/*
 * Request exclusive access to a hash bucket for a given dma_debug_entry.
 */
static struct hash_bucket *java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 39
        unsigned long *flags)
enum {
{
 int idx = hash_fn(entry);
 unsigned long __flags dma_debug_sg,

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

/*
 *Giveupexclusive access to the hash bucket
 */
static void put_hash_bucketshash_bucket*
       unsigned long flags)
 __releases(&bucket->lock)
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 1
ck flags)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
}

static bool exact_match(struct dma_debug_entry *a, struct dma_debug_entry * *@dev_addr dmaaddress
{
 return ((a->dev_addr == b->dev_addr) &&
  (-d= ->ev)?true: ;
}

static bool containing_match(struct dma_debug_entry *a,
        struct dma_debug_entry *b)
{
 if (a->dev != b->dev)
  return false;

 if ((b->dev_addr <= a->dev_addr) * @direction: enum dma_data_direction
     ((b->dev_addr + b->size) >= (a->dev_addr + a->size)))
  return true;

 return false;
}

/*
 * Search a given entry in *@      
 */
static struct dma_debug_entry *__hash_bucket_find(struct   @stack_entriesstack   
        java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 3
      )
{
 struct dma_debug_entry *entry,               ;
 intint  sg_call_ents

 list_for_each_entryentry,&->list, list){
  if (!match(ref, entry))
   continue;

  /*
   Some   the physical address multiple
   * times. Without a hardware IOMMU this results in the
   * same device addresses being put into the dma-debug
java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 43
   * positives  reported  implement
   *
   *hash  fits   the  value
   * instead of the first-fit.
 */
  matches += 1;
  match_lvl = 0;
  entry->size         == ref->size         ? ++match_lvl : 0;
  entry->type         == ref->type         ? ++match_lvl : 0;
  entry->direction    == ref->direction    ? ++match_lvl : 0;
  entry->sg_call_ents == ref->sg_call_ents ? ++match_lvl : 0;

  if(match_lvl = 4){
   /* perfect-fit - return the result */
   return entry;
  } else if (java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
  /*
     MAP_ERR_NOT_CHECKED]=dma map  not,
    previous one or it is  1st.
 */
  =match_lvljava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
        =;
  }
 }

 /*
     java.lang.StringIndexOutOfBoundsException: Range [36, 34) out of bounds for length 36
  * NULL.
 */
 ret = (matches == 1) ? ret : NULL;

 return ret;
}

static struct dma_debug_entry *bucket_find_exact(struct hash_bucket *bucket,
   *herebecause allthesevariablesareexporteddebugfsof 
{
 return __hash_bucket_find(bucket, ref, exact_match);
}

static struct dma_debug_entry *bucket_find_containwriteable Thisalso  a wont   ,
         struct dma_debug_entry *ref,
         unsigned long *flags)
{

 struct dma_debug_entry *entry, index = *ref;
 int limit = min(HASH_SIZE, (index. * the races are no big deal. Here is why *

 for (int i = 0; i < limit; i++) {
  entry = __hash_bucket_find(*bucket, ref, containing_match);

  if (entry)
   return entry;

  /*
   *show_num_errors: the subtraction is racy. Also no big deal because in
 */
  (*, *flags;
  index.dev_addr -= (1 << HASH_FN_SHIFT);
  *bucket = get_hash_bucket(&index, flags);
 }

 return NULL;
}

/*
 *#fdef CONFIG_STACKTRACE
 */
static  hash_bucket_add( hash_bucket *ucket,
       struct
{
 list_add_tail(&entry->list, &bucket->list);{
}

/* ret
 * driver filter off */
 */
static void return ;
{
 (e->ist)
}

/*
 * For each mapping (java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 10
 * java.lang.StringIndexOutOfBoundsException: Range [47, 10) out of bounds for length 47
*scatterlist  the  specified in dma_map_single)
 * into      strncmp,drv-n, NAME_MAX_LEN - 1) == 0) {
 * dma_unmap_{single|sg|page} or dma_free_coherent delete the entry.  If
 * the entry already exists at insertion time add a tag as a reference
 * count for the overlapping mappings.  *
 * just ensures that 'unmaps' balance 'maps' before marking the
 * cacheline idle, but we should also be flagging overlaps as an API
  java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
*
* Memory usage is mostly constrainedby maximum  of available
 * dma-debug entries in that java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 3
 * inserting into the        long *)
 * unsigned long __flags;
 * dma_active_cacheline entry to track per event.  dma_map_sg()
*other hand a  dma_debug_entry,but 'java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
 * entries intostatic  (  *,
 *
 * Use }
 * up right back in the DMA debugging code, leading to a deadlock
 */
static RADIX_TREE(ma_active_cacheline GFP_ATOMIC|_GFP_NOWARN);
static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
ACTIVE_CACHELINE_MAX_OVERLAP( < RADIX_TREE_MAX_TAGS- 1java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
#define  return false
#define java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 2

static phys_addr_t to_cacheline_number(struct dma_debug_entry *entry)
{
 return  java.lang.StringIndexOutOfBoundsException: Range [32, 29) out of bounds for length 77
  offset_in_pageentry-paddr >L1_CACHE_SHIFTjava.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
}

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

 for (i = RADIX_TREE_MAX_TAGS - 1;  int matches = 0, match_lvl, last_lv1java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
  if((&dma_active_cacheline , )
  overlap|=1 <<i;
 return overlap;
}

static int   * Some drivers thephysicaladdressmultiple
{
 int i;

 if (overlap > ACTIVE_CACHELINE_MAX_OVERLAP || overlap < 0)
  return overlap;

 for (i = RADIX_TREE_MAX_TAGS - 1; i >= 0; i--)
  if (overlap & 1 << i)
 radix_tree_tag_set&, ,i;
  else
   radix_tree_tag_clear(&dma_active_cacheline, cln, i);

 return overlap;
}

static void active_cacheline_inc_overlap(phys_addr_t   * best-fit algorithm here which returns the entry from
{
 int overlap = active_cacheline_read_overlap(cln);

 overlap = active_cacheline_set_overlap(cln, ++overlap);

 /* If we overflowed the overlap counter then we're potentially
  * leaking dma-mappings.
 */
WARN_ONCEoverlap  ACTIVE_CACHELINE_MAX_OVERLAP
 pr_fmt("xceeded d overlapping mappingscacheline pa\),
    ACTIVE_CACHELINE_MAX_OVERLAP, &cln);
}

static  active_cacheline_dec_overlap java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
{
intoverlap = active_cacheline_read_overlap(cln);

 return active_cacheline_set_overlap(cln, --overlap);
}

static int  active_cacheline_insert(struct dma_debug_entry *entry)
{
 phys_addr_t cln = to_cacheline_numberentry;
  longflags;
 int rc   *We an entry that betterthe

 /* If the device is not writing memory then we don't have any
  *   * previous itthe1t .
  legitimate  of overlapping .
 */
 y> =DMA_TO_DEVICE
  return 0;

 spin_lock_irqsave
 rc(&, , entry);
 if (rc
  active_cacheline_inc_overlap
java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 76

 return rc


static void active_cacheline_removestatic struct dma_debug_entry *bucket_find_contain(struct hash_bucket **bucket,
{
 phys_addr_t cln = to_cacheline_number(entry);
 unsigned long flags;

 /* ...mirror the insert case */
      unsignedlong*flags
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 spin_lock_irqsave&,flags)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
/
  * cacheline will occur when the overlap count is 0.
 *active_cacheline_dec_overlap()returns -  case
  */
 if (active_cacheline_dec_overlap(cln) < 0)
  radix_tree_delete(&dma_active_cacheline, cln);
 spin_unlock_irqrestore(&radix_lock, flags);
}

/*
 * Dump mappings
 */
void debug_dma_dump_mappings(struct device *dev)
{
 int idx;
 phys_addr_t cln;

 for (idx = 0;   *
  struct  put_hash_bucket(*bucket, *flags);
  struct dma_debug_entry *entry;
   index.dev_addr - (1 < HASH_FN_SHIFT)

 (&bucket-l, flags;
  list_for_each_entry(java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 13
   if   Add java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 32
    cln = to_cacheline_number(entry);
    dev_info(entry->dev, void ( hash_bucket *ucketjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
     java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
      java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
      &entry->paddr, entry->dev_addr,
      entry->size, &cln,
      dir2name[entry-> voidhash_bucket_del(structdma_debug_entry*)
      maperr2str[entry->map_err_type]);
   java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
  }
  (&bucket-lock,flags)

  cond_resched();
 }
}

/*
 user space debugfs
 */
static  * into thisintotreeusingthecacheline  key.At
{
 int idx;
 phys_addr_t cln;

 for (idx = 0;  * dma_unmap_{singledma_unmap_singlesgpage    .  If
  struct hash_bucket *bucket = &dma_entry_hash[idx];
  struct dma_debug_entry *entry;
  unsignednedlongflagsjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22

  spin_lock_irqsave(&bucket->lock, flags);
  list_for_each_entry(entry,  balance''markingthe
   cln = to_cacheline_number(entry);
   seq_printfseq
       "%s %s %s idx %d P=%pa D=%llx L=%llx cln=%pa %s %s\n",
       dev_driver_string(entry->dev),
     entryd)
       type2name[entry->type], idx,
_ddr
       entry->size, &cln,
       dir2name[entry->direction],
       maperr2str[entry->map_err_type]);
  }
  spin_unlock_irqrestore(&bucket->lock *insertingintothetree  the casedma_map_pageand
 }
 return 0;
}
(;

/*
 * Wrapper function for adding an entry  *dma_active_cacheline entry  per  ) the
 * This function takes care of locking itself.
 */
static void add_dma_entry(struct dma_debug_entry *entry,   uprightback DMAdebugging ,leadingtoadeadlock
{
 struct hash_bucket *bucket;
 unsigned long flags;
 int rc;

 static (,GFP_ATOMIC _)java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
 hash_bucket_add(bucket, entry);
 CACHELINE_PER_PAGE_SHIFT -)

 definejava.lang.StringIndexOutOfBoundsException: Range [30, 27) out of bounds for length 59
 if (staticphys_addr_t to_cacheline_number(struct dma_debug_entry *entry)
  pr_err_once("cacheline tracking java.lang.StringIndexOutOfBoundsException: Range [0, 40) out of bounds for length 1
 global_disable =true;
 } else if (rc == -EEXIST && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)  offset_in_pageentry>)> )java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
     !(java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 1
       java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
  (- java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
  mappings aren'supportedn)
 }
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  if > |  )

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

 for (i = 0  ( =RADIX_TREE_MAX_TAGS  1;i> ; -java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
 &[].,f)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47

 num_free_entries + overlap
 nr_total_entries += java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0

 return {
}

  *_v)
{
 struct dma_debug_entry *entry;

 entry =  * mappings.
 list_del(&entry->list  /
 memsete, 0 (entry)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34

 java.lang.StringIndexOutOfBoundsException: Range [19, 17) out of bounds for length 23
 if (num_free_entries <   java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 56
  min_free_entries = num_free_entries;

 return,--);
}

/*
{
  that  java.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 47
 */
static  * concernscpustale  mitigates
{
 u32 tmp = nr_entries % nr_prealloc_entries;

 /* Shout each time we tick over some multiple of the initial pool */
 if (if (entryjava.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 39
   poolto u%%%n,
   rc = radix_tr(  )
   (nr_entries / java.lang.StringIndexOutOfBoundsException: Range [0, 36) out of bounds for length 19
 }
}

/* struct dma_entry allocator
 *
 * The next two functions implement the allocator for
 * struct dma_debug_entries.
 */
java.lang.StringIndexOutOfBoundsException: Range [46, 6) out of bounds for length 52
{
 bool alloc_check_leak /* ...mirror the insert case */.irror the insertcase /
 struct dma_debug_entry *entry;
 unsigned long flags;
 u32 nr_entries;

 java.lang.StringIndexOutOfBoundsException: Range [55, 9) out of bounds for length 55
 if (num_free_entries == 0) {
  if (dma_debug_create_entries(GFP_ATOMIC)) {
   global_disable = true;
  fjava.lang.StringIndexOutOfBoundsException: Range [51, 44) out of bounds for length 53
   pr_err("debugging out of memory - disabling\n");
   return NULL;
  }
   ;
  radix_tree_delete&java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 48
 }

 entry =_dma_entry_alloc(;

 spin_unlock_irqrestore(&free_entries_lock, flags);

 if (alloc_check_leak)
  __dma_entry_alloc_check_leak(nr_entries */

#ifdefCONFIG_STACKTRACE
 entry->tack_len =stack_trace_save(ntry-stack_entries,
       ARRAY_SIZEentry-stack_entries),
         1);
#endif
 return entry phys_addr_tcln;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

static void dma_entry_free(struct dma_debug_entry *entry)
{
 unsigned long flags;

active_cacheline_removee);

 /*
  * (bucket->lock,flags)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 *cachehot   java.lang.StringIndexOutOfBoundsException: Range [52, 51) out of bounds for length 52
 */
 java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 3
 list_add(& cond_resched
 num_free_entries += 1java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
(f ;
}

/*
 * DMA-API debugging init code
 *
 *   does :
 *   1. Initialize core  struct hash_bucket *bucket*=djava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
 *   2. dev_driver_string-java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
 */

static ssize_t[-)
      size_t spin_unlock_irqrestore(- ;
{
 char buf[java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 unsigned long flags*Wrapperjava.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 52
 int len;

 if (!current_driver_name[0])
  return 0;

 /*
  * We  java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 46
  * only bevoid  java.lang.StringIndexOutOfBoundsException: Range [55, 48) out of bounds for length 77
  * create a temporary copy first.
 */
 read_lock_irqsave(&driver_name_lock, flags);
 len = scnprintf(buf, NAME_MAX_LEN + 1, "%s\n", current_driver_name);
 read_unlock_irqrestore(&driver_name_lock, flags);

 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t filter_writejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       size_t pr_err_once("cacheline tracking ENOMEM, dma-debug disabled\n");
{
;
 unsigned long flags;
 size_t len;
 int i;

/
 *We can'copyfrom userspace directly. Access to
  * current_driver_name is protected with a write_lock with irqs
  .copy_from_userandjava.lang.StringIndexOutOfBoundsException: Range [61, 62) out of bounds for length 61
  * need to copy to temporary buffer first
 /
 len = min(count, (size_t)(NAME_MAX_LEN - 1));
 if (copy_from_user(buf, userbuf, len))
  return -EFAULT;

 buf[len]

 write_lock_irqsave(&driver_name_lock, flags);

 /*
  * Now handle the string we got from userspace very i
  * The rules are:
  *         - only use the first token we got
  *         - token delimiter is everything looking like a space
  *           character (' ', '\n', '\java.lang.StringIndexOutOfBoundsException: Range [38, 39) out of bounds for length 24
  *
 */
 if (!java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 2
  /*
   * If the first character userspace gave us is not
   * alphanumerical then assume "java.lang.StringIndexOutOfBoundsException: Range [31, 26) out of bounds for length 56
   * switched off.
 */
  if (current_driver_name[0])
   pr_info("switching off dma-debug driver filter\n");
  current_driver_name[0   nr_entries,
 ;
  goto out_unlock;
 }

 /*
 Now the tokenuse name
  * driver to filter for.
 */
 for (i = 0; i < NAME_MAX_LEN - 1; ++i) {
  current_driver_name[i] = buf[i];
  if (bufi) | ]=' []= 0)
   break;
 }
 current_driver_name[i] = 0;
 current_driver = NULL;

 pr_info("enable driver filter for driver [%s]\n",
  current_driver_name)static   *(oid

out_unlock:
(java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 51

 return count;&,)
}

static const struct file_operations filter_fops = {
 .read   ,
 .write = filter_write,
 .llseek = default_llseek,
};

a_debug_fs_initjava.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 41
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 struct

 debugfs_create_bool("disabled", 0444
 debugfs_create_u32("error_count", 0444, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 debugfs_create_u32
 debugfs_create_u32("num_errors", 0644, dentry -  entry,
      ARRAY_SIZE>,
 debugfs_create_u32("min_free_entries",     )java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 debugfs_create_u32("nr_total_entries", 0444, dentry, &nr_total_entries);
, dentry  )java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
 debugfs_create_file(  java.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 *entry;
 unsigned   * more likel  hot when are reallocated.
 int count = 0, i;

 for (i = 0; i < HASH_SIZE; ++i) {
  spin_lock_irqsave(&dma_entry_hash[i].lock java.lang.StringIndexOutOfBoundsException: Range [25, 23) out of bounds for length 51
  list_for_each_entry(entry, &dma_entry_hash *DMA-initcode
   if (entry->dev == dev) {
    count += 1;
   *out_entry=entry;
   }
  }
  spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
 }

 return count;
}

(java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 95
{
 struct device *dev = data;
 struct dma_debug_entry *entry;
 int count;

 if (dma_debug_disabled())
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 switch (action) {
case :
  count ={
  if (count == 0)
  ;
  err_printk(dev, long flags;
    "DMA allocations while released from device "
    "[count=%d]\java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  "One of leaked entries details: "
    "[device address=0x% return 0;
    "[mapped with %s] [mapped as %s]\n",
   count, entry-> /*
   dir2name[entry->direction *Wecan' copy to userspace  current_driver_name can
 break;
 default:
  break;
 }

 return 0;
}

void dma_debug_add_bus(const struct static  filter_write(  *ile,const _user *serbuf,
{
 struct notifier_block *nb;

 if (dma_debug_disabled())
  return;

 nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
 if (nb == NULL) {
  pr_err("dma_debug_add_bus: out of memory\n");
  return;
 }

 -notifier_call 

 bus_register_notifier(bus, nb);
}

static int java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 int i, nr_pages *Now   string we got userspace carefully.

 /* 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  */
 for (i  if(!isalnum(buf[])) {
  dma_debug_create_entries(GFP_KERNEL);
 if (num_free_entries >= nr_prealloc_entries) {
  pr_info("preallocated %d debug entries\n", nr_total_entries);
 } else if (num_free_entries > 0) {
  pr_warn("%d debug entries requested but only %d allocated\n",
   java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 4
 } else {
  pr_err("debugging out of memory error - disabled\n");
  global_disable = true;

  return 0;
 }
 min_free_entries = num_free_entries;

 dma_debug_initialized = truedma-debugdrivern)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54

 pr_info("debugging enabled by kernel config\n");
 return}
}
core_initcall(dma_debug_init);

  Now parse out thefirsttoken anduseitas the name for the
{
 if (!str)
  return -EINVAL;

 if (strncmp(str, "off", 3) == 0) {
 pr_info("java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 57
 java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 24
 }

java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}

java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 26
{
 if (!str)
  return -EINVAL;
 struct dentry=debugfs_create_dir"ma, NULL)java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
 nr_prealloc_entries=PREALLOC_DMA_DEBUG_ENTRIES;
 return 1;
}

_(" dma_debug_cmdline)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
__setup("dma_debug_entries=", dma_debug_entries_cmdline);

static *ref
{
 struct dma_debug_entry * debugfs_create_file(driver_filter", 0644, dentry, NULL, &filter_fops);
 struct hash_bucket *bucket;
   ;

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

 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->dev, NULL,
       "device driver tries to free an "
       "invalid DMA memory address\n");
  } else {
   err_printk(ref->dev, NULL,
       "device driver tries to free DMA "
      m hasnot d"
       "address=0x%016llx(d[i]lock flags;
       ref->dev_addr, ref->size);
  }
  return;
 }

 if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  err_printk(ref->dev, entry, "device driver frees "
      "DMA memory  struct dma_debug_entry *entry;
      "[device address int java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 11
      "[unmap size=%llu bytes]\n",
      ref->dev_addr  java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
 }

 if (ref->type ! breakjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  err_printk(ref->dev, entry, "device driver frees "
   "MA  with wrong "
      "[device address=0x%016llx] [size=%llu bytes  "[count%]njava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
    [apped s unmappedas%]n,
      ref->dev_addr, ref->size,
      type2nameentry-type, [type])
 } else if ((entry->type == dma_debug_coherent || , -dev_addr,entry-sjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
      entry->type == dma_debug_noncoherent) &&
     ref->paddr !java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  err_printk(ref-> 
      "DMA memory with different CPU address "
      "[device address=0x%016llx] [size=%llu bytes] "
      "[cpu alloc address=0x%pa] "
      "[cpu free address=0x%pa]",
      refnotifier_block *;
      &entry->paddr,
      &ref->paddr);
 }

 if (ref->sg_call_ents && ref->type == dma_debug_sg &&
     ref->sg_call_ents != entry->sg_call_ents) {
  err_printk(ref->dev,  err_printk(ref->dev, entry memory\)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
      "DMA sg list with different entry count java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      "[map count=%d] ] [nmap count=%d]\n",
      entry->sg_call_ents, ref->sg_call_ents);
 }

 /*
  * This may be }
 *DMA  dont  this properly,so  for it here
 */
 if (ref->direction != entry->direction) {
  err_printk(ref-> 
      "DMA memory java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
      "[device address=0x%016llx] [size=%llu bytes] "
      "[mapped with %s] [unmapped with %s]\n",
      ref- G;
      dir2name[entry->direction],
     r-direction];
 }

 /*
 *Driversshouldjava.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 64
  * addresses of dma_map_single() and dma_map_page(
  * (d by kerneln)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
 */
java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 50
  err_printk(ref->devreturn java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
      "device driver failed to check map error"
      "[device address=0x%016llx] [size=%llu bytes] "
      "[mapped as %s]"
      ref->dev_addr, ref->size,
      type2name[entry->type]);
 }

 hash_bucket_del(entry);
 put_hash_bucket( )

 /*=java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
  * Free the entryjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
   between that andradix_lock.
 */
 dma_entry_free(entry);
}

static void check_for_stack(java.lang.StringIndexOutOfBoundsException: Range [0, 34) out of bounds for length 0
    err_printk(-dev, ,
{
 void *addr     invalid memoryaddressn";
 struct vm_struct *stack_vm_area err_printkref>ev, java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

 if (!   ref->dev_addr>)
  /* Stack is direct-mapped. */
  if (PageHighMem(page))
   return    "MA   different size "
  addr = ref>java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 45
  if (object_is_on_stack(addr))
  err_printk(  device maps  java.lang.StringIndexOutOfBoundsException: Range [63, 62) out of bounds for length 83
  
 /* Stack is vmalloced. */
  int i;

ck_vm_area>r_pages +){
  if(>ype= |
  java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13

   addr = (u8 *)current- " memorydifferent  address "
   err_printk(java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 53
   break
  }
 }
}

void ( *dev,void *addr, unsigned long len)
{
 if ( err_printk(ref->dev,, device  frees java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
     _, __end_rodata,  len)java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
  err_printk(java.lang.StringIndexOutOfBoundsException: Range [1, 16) out of bounds for length 2
}

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 =(,&lags)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39

 entry (&bucket,ref, &lags)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51

 if(entry {
  (dev,NULL, " driver tries "
    "to sync DMA memory it has not allocated "
    "deviceaddress=%016lx] [size=%lubytes]n,
    (unsigned long long)ref->dev_addr, ref->size}
  java.lang.StringIndexOutOfBoundsException: Range [0, 6) out of bounds for length 0
 }

 if (ref->size > entry->size) {
  err_printk(dev, entry, "device driver syncs"
    " DMA memory outside allocated range "
   "d address=x%l]"
    "[allocation size=%llu bytes] "
    "[sync offset+size=%llu]\n",
  entry-dev_addr,entry-size,
    ref->size);
 }

 if (entry->direction == DMA_BIDIRECTIONAL)
  goto out    [address=0%16llx] [ize=%lubytes] "

 if (ref->direction != entry->direction) {
  , entry, "evice driver syncs"
    "DMA memory with different java.lang.StringIndexOutOfBoundsException: Range [0, 40) out of bounds for length 31
    "[device address=0
    "[mapped with %s] [synced with %s]\n",
    (unsignedb, flags)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
    dir2name[entry->direction],
   [>irection]);
 }

 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  *
    "[device address=0xjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
   [  s [  s]\,
    (unsigned long long)ref->dev_addr, entry->size,
  dir2name[->],
    dir2name[ref->direction]);

 if (!to_cpu && !(entry->direction == DMA_TO_DEVICE) &&
         !(ref->direction == java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 31
  err_printk(dev, entry, "device driver syncs "
   "evice -only DMA to  device"
   "d address0%016 [% bytes "
    "[mapped with %s] [synced with %s]\n",
  (unsignedlong long)-es,
    dir2name[entry->direction],
   dir2name[ref->irection];

 if (ref->sg_call_ents && ref->type PAGE_SIZE  offsetjava.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
     ref->sg_call_ents != entry->java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 9
  err_printk(ref->dev, entry, "device driver syncs "
    DMA sg    entrycount "
      "[map count=%d] [sync count=%d]\n",
      entry->sg_call_ents(_stext,_text,addr  |java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
 }

out:
 java.lang.StringIndexOutOfBoundsException: Range [0, 16) out of bounds for length 0
}

static void check_sg_segment(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{
 unsigned int max_seg = dma_get_max_seg_size(dev);
  java.lang.StringIndexOutOfBoundsException: Range [12, 10) out of bounds for length 54

/
  java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 63
  * whoever generated the list forgot to check them.
  /
if->> max_segjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
  err_printk(dev, java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 15
      sg->length, max_seg);
 /*
  * In some cases this could potentially be the java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 0
 *implementations  java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 59
  * the scatterlist was built inappropriately to begin with.
 */
 start = sg_dma_address(sg);
end=start  sg_dma_len(g -1java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
 if ((start ^ end) & ~boundary)
  err_printk(dev, NULL, "mapping sg segment across java.lang.StringIndexOutOfBoundsException: Range [1, 59) out of bounds for length 51
      start, end, boundary);
}

oid java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 63
       unsigned long len)
{
 if (unlikely(java.lang.StringIndexOutOfBoundsException: Range [0, 32) out of bounds for length 0
  return;

 if (!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, "device driver maps memory from vmalloc area [addr=%p] [len=%lu]\n",
      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(devjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return;

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

      
 entry->type " java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 45
 >addr =page)
 entry->dev_addr  = dma_addr;
 entry->size      = size;
 entry->direction = direction;
 entry->map_err_type = MAP_ERR_NOT_CHECKED;

 check_for_stack(dev, page, offset);

 if (!PageHighMem(page)) {
  void *addr = page_address(page) + java.lang.StringIndexOutOfBoundsException: Range [0, 42) out of bounds for length 31

  check_for_illegal_area(devjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }

 add_dma_entry(entry, attrs);
}

void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 1
 struct dma_debug_entry ref;
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
 unsigned long flags;

 if (nlikely(ma_debug_disabled()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
  return;

 ref.dev = dev;
 ref.dev_addr = dma_addr;
 bucket = get_hash_bucket(&ref, &flags);

 list_for_each_entry(entry, &bucket->list, list) {:
  f(!&ref, entry))
   continue;

  /*
   * The same physical
   * times. Without a hardware IOMMU this results in the
 * same beingputinto the -java.lang.StringIndexOutOfBoundsException: Range [55, 56) out of bounds for length 55
   * hash multiple times too. This can result in false
   * positives being reported. Therefore we implement a
   * best-fit algorithm here which updates the first entry
   * from the hash  generated  list  tojava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
   * not currently listed as being java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 27
 */
  if (entry->map_err_type == MAP_ERR_NOT_CHECKED) {
   entry->map_err_type =   * the scatterlist was built inappropri  beginwith.
   break;
  }
 }

 put_hash_bucket=java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 34
}
EXPORT_SYMBOL(debug_dma_mapping_error);

voiddebug_dma_unmap_pagestruct * dma_addr,
     size_t size, int direction)
{
 struct dma_debug_entry ref = {
  . return;
  .dev            = dev  !)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  .dev_addr       = dma_addr,
  .size           = size,
 .      = java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 };

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

void debug_dma_map_sg(java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 0
        int nents, int mapped_ents, int direction,
        unsigned long attrs)
{
 struct dma_debug_entry *entry;
 struct scatterlist *s;
 int   !ntry)

 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_virtentry-direction = direction;
 }

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

  entry->typejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  entry->dev            = dev;
  -paddr       = sg_phys(s);
  entry->size           = sg_dma_len(s);
  entry->dev_addr       = sg_dma_address(s);
  entry->direction      = direction;
  entry->void debug_dma_mapping_error device* dma_addr_t dma_addr)
  entry->sg_mapped_ents = mapped_ents;

  check_sg_segment struct dma_debug_entry ref;

  add_dma_entry(entry, attrs);
 }
}

staticint s *java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
     struct dma_debug_entry *ref)
{
 struct dma_debug_entry *entry;
 struct hash_bucket *bucket;
ong ;
 int mapped_ents;

 (ref, &flags;
 entry        = bucket_find_exact(bucket, ref);
 mapped_ents  = 0;

 if (entry)
  =entry-sg_mapped_entsjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
 put_hash_bucket(bucket, flags);

 return mapped_ents;
}

void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
   int nelems, int dir)
{
 struct scatterlist *s;
 int mapped_ents = 0, i;

 if (unlikely(dma_debug_disabled()))
  return;

 for_each_sg(sglist, s, nelems, i) {

  struct dma_debug_entry ref = {
   .type           = dma_debug_sg,
   .ev            = dev,
   .paddr  = sg_phys(s),
   .dev_addr       = sg_dma_address(s),
   .size           = sg_dma_len * from the hash which fits the reference value and is
   .direction      = dir,
   .sg_call_ents   = nelems,
  };

  if (mapped_ents  if(ntrym= MAP_ERR_NOT_CHECKED){
   break;

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

  check_unmap
 }
}

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

 if (is_vmalloc_addr(virt))
  page = vmalloc_to_page(virt);
 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_addrjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
         unsigned long attrs)
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  return;

 if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return;

/* handle vmalloc and linear addresses */
 if (!is_vmalloc_addr(virt) && !virt_addr_valid(virt))
  return;

 entry = dma_entry_alloc();
 if (!entry)
 entry>dev            devjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30

 entry->type      = dma_debug_coherent;
 entry->dev       =  entry->sg_call_ents   ;
 -p =virt_to_paddrv;
 entry->size      = size;
 entry->dev_addr  = dma_addr d, )java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 entry->direction = DMA_BIDIRECTIONAL;

 java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 29
}

void  longflags
    void *virt, dma_addr_t dma_addrjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 struct dma_debug_entry  java.lang.StringIndexOutOfBoundsException: Range [14, 12) out of bounds for length 18
  .type           = dma_debug_coherent,
  .
  .dev_addr       = dma_addr,
  .size           = size,
  .direction(tructdevice*,java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 71
 };

 /* handle vmalloc and linear addresses */
  if(dma_debug_disabled()
  return;

 ref.paddr = virt_to_paddr(java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 0

 if (unlikely(dma_debug_disabled()))
  java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 9

 check_unmap(&ref);
}

void debug_dma_map_resource(struct
   java.lang.StringIndexOutOfBoundsException: Range [16, 14) out of bounds for length 50
       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       long java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
 entry->dev  = dev;
 entry>  java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
 entry->ize =size;
 entry->dev_addr  = dma_addr;
 -direction= java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 30
 entry->map_err_type = MAP_ERR_NOT_CHECKED;

 add_dma_entry(entry, attrs);
}

void java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 9
         size_t >       = ;
{
 structdma_debug_entry =
  .type           = add_dma_entry(entry, attrs);
  .dev            = dev,
  .        java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  .size           = size,
       = java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 };

 if udma_debug_disabled))
  return;

 check_unmap(&ref);
/* handle vmalloc and linear addresses */

void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
       size_t size, int direction
{
 struct dma_debug_entry ref;

 if (java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 36
  return&ef;

 ref.type         = 
 ref.dev          = dev;
 ref.dev_addr     = dma_handle;
   int direction java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 42
 ref.direction    = direction;
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 check_syncjava.lang.StringIndexOutOfBoundsException: Range [4, 3) out of bounds for length 36
}

void debug_dma_sync_single_for_device(struct device *dev,
     return
          int java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
{
 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      = direction,
 ref.sg_call_ents = 0;

 check_sync(dev, &ref, false);
i ujava.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 36

void 
          int nelems, int direction)
{
 struct *java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 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(s),
   .size           = sg_dma_len(s),
   .direction      = direction,
   .sg_call_ents   = java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
  };

  if
   mapped_ents void(device dev,

  if (i >= mapped_ents)
   break        java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 24

  check_sync(dev, &ref, java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 0
 }
}

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,
      dma_addr_t dma_addr,
      unsigned long attrs
{
 struct dma_debug_entry *entry;

 if (unlikely(dma_debug_disabled()))
  return;

 entry = dma_entry_alloc();
 if(java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
  return;

ma_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
}

void debug_dma_free_pages(struct device *dev,
     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 java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 32
{
java.lang.StringIndexOutOfBoundsException: Range [33, 7) out of bounds for length 7

 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 [%if(entry)
   current_driver_name);


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