static int igt_gem_huge(void *arg)
{
const unsigned int nreal = 509; /* just to be awkward */
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
unsigned int n;
int err;
/* Basic sanitycheck of our huge fake object allocation */
obj = huge_gem_object(i915,
nreal * PAGE_SIZE,
i915->ggtt.vm.total + PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
err = i915_gem_object_pin_pages(obj);
if (err) {
pr_err("Failed to allocate %u pages (%lu total), err=%d\n",
nreal, obj->base.size / PAGE_SIZE, err);
goto out;
}
for (n = 0; n < obj->base.size / PAGE_SIZE; n++) {
if (i915_gem_object_get_page(obj, n) !=
i915_gem_object_get_page(obj, n % nreal)) {
pr_err("Page lookup mismatch at index %u [%u]\n",
n, n % nreal);
err = -EINVAL;
goto out_unpin;
}
}
out_unpin:
i915_gem_object_unpin_pages(obj);
out:
i915_gem_object_put(obj);
return err;
}
static struct drm_i915_error_object *
i915_error_object_create_sized(struct drm_i915_private *dev_priv,
struct drm_i915_gem_object *src,
const int num_pages)
{
struct drm_i915_error_object *dst;
int i;
u32 reloc_offset;
if (src == NULL || src->pages == NULL)
return NULL;
dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
if (dst == NULL)
return NULL;
reloc_offset = dst->gtt_offset = i915_gem_obj_ggtt_offset(src);
for (i = 0; i < num_pages; i++) {
unsigned long flags;
void *d;
d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
if (d == NULL)
goto unwind;
local_irq_save(flags);
if (reloc_offset < dev_priv->gtt.mappable_end &&
src->has_global_gtt_mapping) {
bus_space_handle_t bsh;
void __iomem *s;
/* Simply ignore tiling or any overlapping fence.
* It's part of the error state, and this hopefully
* captures what the GPU read.
*/
#ifdef __linux__
s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
reloc_offset);
#else
agp_map_atomic(dev_priv->agph, reloc_offset, &bsh);
s = bus_space_vaddr(dev_priv->bst, bsh);
#endif
memcpy_fromio(d, s, PAGE_SIZE);
#ifdef __linux__
io_mapping_unmap_atomic(s);
#else
agp_unmap_atomic(dev_priv->agph, bsh);
#endif
} else if (src->stolen) {
unsigned long offset;
offset = dev_priv->mm.stolen_base;
offset += src->stolen->start;
offset += i << PAGE_SHIFT;
memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
} else {
struct vm_page *page;
void *s;
page = i915_gem_object_get_page(src, i);
drm_clflush_pages(&page, 1);
s = kmap_atomic(page);
memcpy(d, s, PAGE_SIZE);
kunmap_atomic(s);
drm_clflush_pages(&page, 1);
}
local_irq_restore(flags);
dst->pages[i] = d;
reloc_offset += PAGE_SIZE;
}
dst->page_count = num_pages;
return dst;
unwind:
while (i--)
kfree(dst->pages[i]);
kfree(dst);
return NULL;
}
