msm: kgsl: Allocate physical pages instead of using vmalloc
Replace vmalloc allocation with physical page allocation. For most
allocations we do not need a kernel virual address. vmalloc uses up
the kernel virtual address space. By replacing vmalloc with physical
page alloction and mapping that allocation to kernel space only
when it is required prevents the kgsl driver from using unnecessary
vmalloc virtual space.
Change-Id: Idc716c8366f837f06a61b154deacec65a3a0662e
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_drm.c b/drivers/gpu/msm/kgsl_drm.c
index 03f8c42..d43b29b 100644
--- a/drivers/gpu/msm/kgsl_drm.c
+++ b/drivers/gpu/msm/kgsl_drm.c
@@ -903,17 +903,18 @@
struct drm_gem_object *obj = vma->vm_private_data;
struct drm_device *dev = obj->dev;
struct drm_kgsl_gem_object *priv;
- unsigned long offset, pg;
+ unsigned long offset;
struct page *page;
+ int i;
mutex_lock(&dev->struct_mutex);
priv = obj->driver_private;
offset = (unsigned long) vmf->virtual_address - vma->vm_start;
- pg = (unsigned long) priv->memdesc.hostptr + offset;
+ i = offset >> PAGE_SHIFT;
+ page = sg_page(&(priv->memdesc.sg[i]));
- page = vmalloc_to_page((void *) pg);
if (!page) {
mutex_unlock(&dev->struct_mutex);
return VM_FAULT_SIGBUS;