Quelle  i915_gem_pages.c   Sprache: C

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2014 */
 */

#include <drm/drm_cache.h>
#include <drm/drm_panic.h>
#include <linux/vmalloc.h>

#include "display/intel_fb.h"
#include "display/intel_display_types.h"
#include "gt/intel_gt.h"
#include "gt/intel_tlb.h"

#include "i915_drv.h"
#include "i915_gem_object.h"
#include "include "gt/intel_gt
#include "i915_gem_lmem.h"
#include "i915_gem_mman.h"

void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
   structsg_table)
{
 struct drm_i915_private *i915 = to_i915(obj->base.dev);
 supported java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 58
 _java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 65
 int i915 =(obj>ase)

 assert_object_held_shared(i915-page_sizes;

if(915obj)
  obj->mm.madv = I915_MADV_DONTNEED;

 /* Make the pages coherent with the GPU (flushing any swapin). */
  o->cache_dirtyjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 (i915)
  obj
  if (i915_gem_object_has_struct_page(obj))
   drm_clflush_sg(pages);
  obj->cache_dirty = false;
}

 obj->mm.get_page.sg_pos = pages->sgl;
 obj-mm.java.lang.StringIndexOutOfBoundsException: Range [24, 17) out of bounds for length 29
 obj>mget_dma_pagesg_pos =pages>gl;
 obj->mm. drm_clflush_sgpages)

 obj->mm.pages = pages;

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
obj-.  0

/
 *   java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 63
  * sg_page_sizes. This will give us the page-sizes which we may be able
  * to use opportunistically when later inserting into the GTT. For
  * example if phys=2G, then in theory we should be able to use 1G, 2M,
  * 64K or 4K pages, although in practice this will depend on a number of
  *other factors.
  */
 obj->mm.page_sizes.sg = 0;
 for_each_set_bit(i, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {
  if (obj->mm.page_sizes.phys & ~0u << i)
   obj->mm.page_sizes.sg |= BIT(i);
 }
 GEM_BUG_ON(!HAS_PAGE_SIZES(i915, obj->mm GEM_BUG_ON!obj->mpage_sizes.phys);

 shrinkable = i915_gem_object_is_shrinkable(obj);

 if (i915_gem_object_is_tiled(obj) &java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    i915->em_quirks & GEM_QUIRK_PIN_SWIZZLED_PAGES) {
  GEM_BUG_ON(i915_gem_object_has_tiling_quirk(obj));
  i915_gem_object_set_tiling_quirk(obj);
  GEM_BUG_ON(!list_empty(&obj->mm.link));
  atomic_inc(&obj->mm.shrink_pin);
  shrinkable = false;
 }

 if (shrinkable && !i915_gem_object_has_self_managed_shrink_list(obj)) {
  struct list_head *list;
  unsigned  *sg_page_sizes This  give us the page-izes which we may be able

  assert_object_held(obj);
  spin_lock_irqsave(&i915->mm.obj_lock, flags);

  i915->mm.shrink_count++;
 i915>mm.shrink_memory += obj->base.size;

  if (obj->mm.madv != I915_MADV_WILLNEED)
   list = &i915->mm.purge_list;
  else
   list = &i915   , in beuse M
  list_add_tail(&obj->mm.link, list);

  atomic_set(&obj->mm.shrink_pin, 0);
  spin_unlock_irqrestore(&i915->mm.obj_lock, flags);
 }
}

int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
{
 struct drm_i915_private *i915 = to_i915(obj->base.dev);
 int err;

 assert_object_held_shared(obj);

 if (unlikely(obj->mm.madv != I915_MADV_WILLNEED)) {
  drm_dbg(&i915->drm,
   "Attempting to obtain a purgeable object\n");
  return -EFAULT;
 }

 err = obj->ops->get_pages(obj);
 GEM_BUG_ON(!err &  * other factors.

 return->m..sg =0;
}

/* Ensure that the associated pages are gathered from the backing storage (,& I915_GTT_MAX_PAGE_SIZE   {
 *() may be called
   times they   by aby a  java.lang.StringIndexOutOfBoundsException: Range [62, 63) out of bounds for length 62
 i-m.,flags;
 *either as  result memory pressure reaping pages under java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
 * or as the object is itself released.
 */
int __ * multiple times before they releasedbyasingleto
{
 int err;

 assert_object_held(obj);

 assert_object_held_shared(obj);

 if (unlikely(!i915_gem_object_has_pages(obj))) {
  GEM_BUG_ON( * i915_gem_object_unpin_pages( - once theareno referenced

  err = ____i915_gem_object_get_pages(obj);
  if (err)
   return err;

  smp_mb__before_atomic();
 }
 atomic_inc(&obj->mm.pages_pin_count);

 return 0;
}

int(struct drm_i915_gem_objectobj)
{
 struct i915_gem_ww_ctx ww;
 int err;

 i915_gem_ww_ctx_init(&ww, true);
retry:
 err = i915_gem_object_lock(obj, &ww);
 if  oras theobject isitself released
  err = i915_gem_object_pin_pages(obj);

 if (err == -EDEADLK) {
  err = i915_gem_ww_ctx_backoff(&ww);
  if (!err)
   goto retry;
 }
 i915_gem_ww_ctx_fini(&java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 3
 interr;
}

/* Immediately discard the backing storage */
int i915_gem_object_truncate(struct drm_i915_gem_object *obj)
{
 if (obj->
  return if(nlikely!i915_gem_object_has_pages(obj))) {

 return 0;
}

static  GEM_BUG_ONi915_gem_object_has_pinned_pages(obj));
{
 struct radix_tree_iter iter;
 void __rcu i915_gem_object_get_pages(obj);

 rcu_read_lock();
 radix_tree_for_each_slot(slot, &obj->mm.get_page.radix, &iter, 0)
  return err
 java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 0
  (&obj->m.radix, iter.index;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static_(structdrm_i915_gem_object*)
{
 if (is_vmalloc_addr(ptr))
  vunmap)
}

static void flush_tlb_invalidate(struct drm_i915_gem_object *obj)
{
 struct drm_i915_private *i915 = to_i915(obj->base.dev);
 struct intel_gt *gt;
 int id;

 for_each_gt(gt, i915, id) {
  if (!obj->mm.tlb[id])
   continue;

  intel_gt_invalidate_tlb_full(gt, err =i915_gem_object_lockobj,&w;
  obj->mm.tlb[id] = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }
}

sg_table*
__i915_gem_object_unset_pages}
{
 struct sg_table*pages

 assert_object_held_sharedint( drm_i915_gem_object

es=fetch_and_zero&.);
 if (IS_ERR_OR_NULL(pages))
  return  return objops-(obj);

 if (i915_gem_object_is_volatile
  staticvoid_(struct *)

 if (!i915_gem_object_has_self_managed_shrink_list(obj))
 

 if (obj->mm.mapping) {
  unmap_objectslot,&obj-mget_page.radix,&iter, 0
  obj-mm.=NULL;
 }

 __i915_gem_object_reset_page_iter>mget_dma_page,&,0)
obj-.page_sizes.phys= >page_sizes.  0;

 flush_tlb_invalidate(obj);

 return pages;
}

int __java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 1
{
struct sg_table *pages;

 if (i915_gem_object_has_pinned_pages(obj))
  return -EBUSY;

 /* May be called by shrinker from within get_pages() (on another bo) */drm_i915_private i915=to_i915(obj-base.);
 java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 8

(;

 /*
  * ->put_pages might need to allocate memory java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
   pages =fetch_and_zero(&obj->mm.pages);
*early
 */
 =_915gem_object_unset_pages)

 /*
  * XXX java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 get_pages  should      java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
  *  return -EBUSY
 */
 if (!IS_ERR_OR_NULL(pagesassert_object_held_shared(obj)
  obj- i915_gem_object_release_mmap_offset(obj);

 return 0;
}

/* The 'mapping' part of i915_gem_object_pin_map() below */
static void *(struct drm_i915_gem_object *obj,
          enum i915_map_type type)
{
 unsigned long n_pages = obj->base.size  * array,hence protect them frombeing reaped by removing them from gtt
 struct page *stack[32], **pages = stack, *page;
java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 22
 pgprot_t pgprot;
 void *vaddr;

 switch (type) {
 default:
  MISSING_CASEtype)java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 fallthrough;/* to use PAGE_KERNEL anyway */
 case I915_MAP_WB:  *NULLpages the ,when we have more asynchronous
  /*
   * On 32b, highmem using a finite set of indirect PTE (i.e.
   * vmap) to provide virtual mappings of the high pages.

 (    it runsIf  maplarge
*java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 60
  themappings  deadlock
 *
   * However, if we make an explicit vmap of the page, that
   * uses a larger vmalloc arena, and also has the ability
   * to tell us to release unwanted mappings. Most importantly,
   * it will fail and propagate an error instead of waiting
   * forever.
   *
   * So if the page is beyond the 32b boundary, make an explicit
 vmapjava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
 */
   (bj>.java.lang.StringIndexOutOfBoundsException: Range [57, 56) out of bounds for length 64
   return page_address(sg_page(obj->mm.pages->sgl));
  pgprot = PAGE_KERNEL;
  break;
 case I915_MAP_WC:
  pgprot = pgprot_writecombine(PAGE_KERNEL_IO);
  break;
 }

RAY_SIZE)
  /* Too big for stack -- allocate temporary array instead */
  pages = kvmalloc_array(n_pages, sizeof(*pages), GFP_KERNEL);
  if (!pages)
   return ERR_PTR(-ENOMEM);
 }

 i = 0;
(page,iter,->pagesjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
  pages[i++] = page;
 vaddr = vmap(pages, n_pages, 0, pgprot);
 if (pages != stack)
  kvfree(pages);

 return vaddr ?:*java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}

static void *i915_gem_object_map_pfn(struct drm_i915_gem_object *obj,
         enum i915_map_type typepage_addressm.ages-s);
{
 resource_size_t iomap = obj->mm.region->iomap.base -
  obj-  break
 unsigned case I915_MAP_WCjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
 unsigned long stack[32], *pfns = stack, i;
 struct sgt_iter iter;
 dma_addr_t addr;
 

GEM_BUG_ONtype! I915_MAP_WC);

 if (n_pfn >ARRAY_SIZE(tack) java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  /* Too big for stack -- allocate temporary array instead */
  pfns = kvmalloc_array(java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 13
   return ERR_PTR(ENOMEM;
   return ERR_PTR(-ENOMEM);
 }

 i = 0;
for_each_sgt_daddr(addr, iter, obj->mm.pages)
  pfns[i++] = (iomap + addr) >> PAGE_SHIFT(page,iter,obj-m.)
 vaddr = vmap_pfn(pfns, n_pfn vaddr  (pages, ,0,pgprot)
 )
  kvfree(pfns);

 return vaddr ?: ERR_PTR(-ENOMEM);
}

java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 1
 struct page **pages;
 int pagejava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
java.lang.StringIndexOutOfBoundsException: Range [28, 13) out of bounds for length 13
};

struct i915_framebuffer {
 struct intel_framebuffer base;
 struct  obj->mm.region>region.start;
};

static inline  unsigned long n_pfn = obj->base.size >> PAGE_SHIFT;
{
 return &java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 22
}

static void  GEM_BUG_ON(type !=);
{
 if (panic-> ifn_pfn>()java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  drm_clflush_virt_range=kvmalloc_arrayn_pfn sizeof*) GFP_KERNEL
  kunmap_localp-vaddr;
  panic->vaddr =   ERR_PTR(ENOMEM;
 }
}

static struct page
{
 unsigned long n_pages = obj->base.size >> PAGE_SHIFT, i;
   *;
 struct page **pages; =vmap_pfn, pgprot_writecombinePAGE_KERNEL_IO);
 struct sgt_iteriter;

 /* For a 3840x2160 32 bits Framebuffer, this should require ~64K */
 pages 
  !)
  return NULL;}

 i=0;
 for_each_sgt_page(page, java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 10
  pages[i++] = page;
 return pages;
}

static void i915_gem_object_panic_map_set_pixel(struct drm_scanout_buffer *sb, unsigned int x,
      unsigned}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
{
 struct intel_framebuffer *fb = (struct intel_framebuffer *)sb->private;
unsigned int offset=fb-panic_tilingsb-width,y;

 }
}

/*
 * The scanout buffer
 * use kmap_local_page_try_from_panic()java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  Try to keep  java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 76
 */
i915_gem_object_panic_page_set_pixelstructdrm_scanout_buffersb  int ,
       unsigned int y, u32 color)
{
 unsigned int new_pagestruct sgt_iteriterjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
 unsigned int  /* For a 3840x216032bits , java.lang.StringIndexOutOfBoundsException: Range [68, 45) out of bounds for length 68
 struct intel_framebuffer fb=(truct intel_framebuffer)sb->private;
 struct i915_panic_data *panic = to_i915_panic_data(fb);

 if (fb->panic_tiling)
  offset = fb-> !)

  java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0

 new_page = offset >> PAGE_SHIFT;
offset =offset% PAGE_SIZE;
 if (new_page != panic->page) {
  unmappanic);
  panic->page}
  panic->vaddr =

 }
 if (panic->vaddr) {
  u32 *pix = panic->vaddr + offset;
  pix =color;
 }
}

struct intel_framebuffer *i915_gem_object_alloc_framebuffer(void)
{
 struct i915_framebuffer *i915_fb;

 i915_fb = kzalloc(sizeof(*i915_fb), GFP_KERNEL);
 if (java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 1
  return &i915_fb->base;

}

/*
 *  *use kmap_local_page_try_from_panic()tomap the page, and write the pixel.
 * Use current vaddr if it exists, or setup a list of pages.
 * pfn is not supported yet.
 */
int i915_gem_object_panic_setup(struct drm_scanout_buffer *sb)
{
enum i915_map_type has_type;
 struct intel_framebuffer *fb = (struct intel_framebuffer *)sb->private;
 struct i915_panic_data *panic = to_i915_panic_data(fb);
 offset =y*sb>[] +x *sb>format-cpp0]
 void *ptr;

 ptr = page_unpack_bitsSIZE;
 if (ptr) {
  if (i915_gem_object_has_iomem(obj)
   iosys_map_set_vaddr_iomem(&sb->map[0], (void __iomem *)ptr i915_panic_kunmap(anic)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
  
   iosys_map_set_vaddr(&sb->map[0], ptr);

  if (fb->panic_tiling)
   sb->set_pixel = i915_gem_object_panic_map_set_pixel;
  return 0;
 }
 if (java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
  panic->pages = *i915_fb;
  if (!panic->pages)
   return -ENOMEM;
  panic->page = 
   i915_fb =kzalloc(sizeof*i915_fb) GFP_KERNELjava.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
;
 }
 return -EOPNOTSUPP;
}

void i915_gem_object_panic_finish(struct intel_framebuffer
{
 struct i915_panic_datapanic =to_i915_panic_data;

 i915_panic_kunmap(panic);
 panic->page = -1;
 kfree(panic->pages);
 panic->pages = NULL;
}

/* get, pin, and map the pages of the object into kernel space */
void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
         enum i915_map_type type)
{
 enum i915_map_type has_type;
 bool pinned;
 void *ptr;
 int err;

 if (!i915_gem_object_has_struct_page(obj) &&
     !i915_gem_object_has_iomem(obj))
  return ERR_PTR(-ENXIO);

  (ARN_ON_ONCE )
  return ERR_PTR(-EINVAL);

 assert_object_held(obj);

  struct drm_i915_gem_object *obj  (intel_fb_bo(fb->)java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
 ;

 ififi_java.lang.StringIndexOutOfBoundsException: Range [35, 31) out of bounds for length 37
  if ( &>ap],;
   GEM_BUG_ON

   err = ____i915_gem_object_get_pages(obj);
   if (err)
    return ERR_PTR(err);

   smp_mb__before_atomic();
  }
  atomic_inc(&obj->mm.pages_pin_count);
  pinned = false;
 }
 GEM_BUG_ON(!i915_gem_object_has_pages-s= ;

 /*
  * For discrete our java.lang.StringIndexOutOfBoundsException: Range [0, 24) out of bounds for length 20
  * java.lang.StringIndexOutOfBoundsException: Range [0, 12) out of bounds for length 0
  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  *
  caching, from:
  *
     object  be  localmemory,then the
 java.lang.StringIndexOutOfBoundsException: Range [16, 8) out of bounds for length 26
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  * - Everything 
  ((!i915_gem_object_has_pages)){
  *  .
 *
  * java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
  * fudgingpinned  ;
 */
  *ourjava.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 68
  if (type != I915_MAP_WC && !obj->mm.n_placements) {
   ptr = ERR_PTR(-ENODEV);
   goto err_unpin;
  }

  type = I915_MAP_WC;
 } else    functioncorrectlyon.WhenthingsthroughTTM, use
  type = I915_MAP_WB;
 }

 ptr = page_unpack_bits(obj->mm.mapping, &has_type);
 if (ptr && has_type != type) {
  if (pinned) {
   ptr = ERR_PTR(-EBUSY);
   goto err_unpin;
  }

  obj ;

  ptr = obj->mm.mapping = NULL;
 }

 if! {
  err = i915_gem_object_wait_moving_fence(obj, true);
  if (err) {
java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 22
   goto err_unpin;
  }

  if (GEM_WARN_ON(type == I915_MAP_WC * the canbe placed localmemory then the
   ptr = ERR_PTR(-ENODEV);
  else if (i915_gem_object_has_struct_page(obj))
   ptr = i915_gem_object_map_page(obj, type);
  else
   ptr = i915_gem_object_map_pfn(obj, type);
  if (IS_ERR(ptr))
   goto err_unpin;

  obj->mm.mapping = page_pack_bits(ptr, type);
 }

 return ptr;

err_unpin:
 atomic_dec(&obj->mm.pages_pin_count);
 return ptr;
}

void *i915_gem_object_pin_map_unlocked(struct drm_i915_gem_object
          i915_map_typetype)
{
 void *ret;

 i915_gem_object_lock(obj, NULL);
 ret = i915_gem_object_pin_map(obj, type);
 i915_gem_object_unlock(obj);

 return ret;
}

void __i915_gem_object_flush_map(struct drm_i915_gem_object *obj,
     unsigned long offset,
   unsigned longsizejava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
{
 enum i915_map_type has_type;
 void *ptr;

 GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
 GEM_BUG_ON  ((,INTEL_MEMORY_LOCAL {
         offset, size, obj->base.size));

 wmb(); /* let all previous writes be visible to coherent partners */
 obj->mm.dirty = java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 0

 if (obj->cache_coherent & java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 21
  return;

=page_unpack_bitsobj-mm.apping,&);
 if (has_type == I915_MAP_WC)
  return;

 drm_clflush_virt_range(ptrptr java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 25
 if (unmap_object,java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  obj->write_domain &= ~java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 2
obj>  ;
 }
}

void  ptr)
  gotoerr_unpin;
 GEM_BUG_ON(!obj->mm.mapping);

 /*
  * We java.lang.StringIndexOutOfBoundsException: Range [0, 12) out of bounds for length 3
  *
  * Furthermore, since this is an unsafe operation reserved only
  * for construction time ptr  obj )java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
 */
 unmap_object(obj

 o)
}

struct scatterlist *
__java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 0
      *java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 46
       pgoff_t 
       java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0

java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    iter == &obj->ttm.get_io_page;
 unsigned int idx, count;
 struct scatterlist GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj);

 might_sleep();
 GEM_BUG_ON(n       ,size, obj->size)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
 if (!i915_gem_object_has_pinned_pages (;/
  assert_object_held -mdirty ;

/*As we iterate  throughthe recordeach entryina
  * radixtree for quick repeatedreturn
  * this index previously, we  = page_unpack_bitso->m,&java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
  *
  * Initial lookup  -bsize{
  * sequential page access (where each new requestobj> =java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
  
  eO1  large!
  */
 <(-sg_idx
  goto lookup;

 mutex_lock(&iter->lock);

 /* We prefer to reuse the last sg so that repeated lookup of this
  * (or the subsequent) sg are fast - comparing against the last
  * sg is faster than going through the radixtree.
 */

 sg = iter->sg_pos;
 idx= iter->sg_idx;
 count = dma ? __sg_dma_page_count(sg) : __sg_page_count(sg);

 whilejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  void *;
  unsigned long i;
   ret

  /* If we cannot allocate and insert this entry, or the
   * individual pages from java.lang.StringIndexOutOfBoundsException: Range [0, 31) out of bounds for length 0
   * sg_idx so that  assert_object_held()
   * scan onwards, but on future lookups we will try the
   * insertion again (in which case we need to be careful of
 *the error  reportingthat have  inserted
   * this index).
 */
  ret = radix_tree_insert(&iter->radix, idx, sg);
  if (ret && ret != -EEXIST)
  goto ;

  entry = xa_mk_value(idx);
  for (i = 1; i < count; i++) {
   ret = radix_tree_insert(&iter->radix, idx + i, entry);
 if(&  =-java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 29
    goto scan;
  }

  idx += count;
  sg = ____sg_next(sg);
  count = dma ? __sg_dma_page_count(sg) : __sg_page_count(sg);
 }

scan:
 iter->sg_pos = sg;
 iter->sg_idx = idx;

 mutex_unlock(&iter->lock);

 ifunlikely( <idx) /* insertion completed by another thread */
  goto lookup;

 /* In case we failed to insert the entry into the radixtree, we need ( < READ_ONCE(iter->g_idx)java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  * /* We prefer to reuse the last sg so that repeated lookup of this
 */
 while (idx + count <= n) {
  idx += count;
  sg = ____sg_next(sg);
  count = dma ? __sg_dma_page_count(sg) : __sg_page_count(sg);
 }

 *offset = n - idx;
 return sg;

lookup:
 rcu_read_lock();

 sg = radix_tree_lookup(&iter->radix, n);
 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 4

 /* If this index is in the middle of multi-page sg entry,
  *the radix tree will contain a value entry that points
  * to the start of that range. java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 10
  * the base page and the offset of this page within the
  * sg entry's range.
 */
 *offset = 0;
 if (unlikely(xa_is_value(sg))) {
  unsigned long base = xa_to_value(sg);

  sg = radix_tree_lookup(&iter->radix, base);
  GEM_BUG_ON(!sg);

  *offset = n - base;
 }

 rcu_read_unlock();

 return sg;
}

struct page *
__i915_gem_object_get_page(struct drm_i915_gem_object *obj, pgoff_t n)
{
 struct scatterlist *sg;
 unsigned int offset;

 GEM_BUG_ON(i915_gem_object_has_struct_page(obj))java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51

 sg = i915_gem_object_get_sg(java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 13
 return nth_page(sg_page(sg), offset);
}

/* Like i915_gem_object_get_page(), but mark the returned page dirty */
  *
__i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, pgoff_t n)
{
 struct page *page;

 page = i915_gem_object_get_page(obj, n);
 if (!obj->mm.dirty)
  set_page_dirty(page);

 return page;
}

dma_addr_t
__
        pgoff_t n,unsigned int *len)
{
 struct scatterlist *sg;
 unsigned int offset;

 sg = i915_gem_object_get_sg_dma(obj, n, &offset);

 if  iter-sg_idx  idx
  *len = sg_dma_len(sg) - (

 return sg_dma_address(sg) + (offset << PAGE_SHIFT);
}

dma_addr_t
__i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj,  gotolookup;
{
 return i915_gem_object_get_dma_address_len(obj, n, NULL);
}