rubenslte/android_kernel_samsung_msm8226-rubenslte
1
Fork 0
forked from rubenslte/android_kernel_samsung_msm8226
Code Pull Requests Activity

msm: kgsl: don't clear gpuaddr when unmapping global mappings

Browse Source 
Memory mapped through kgsl_mmu_map_global() is supposed to have
the same gpu address in all pagetables. And the memdesc will
persist beyond the lifetime of any single pagetable.
Therefore, memdesc->gpuaddr should not be zeroed for these
memdescs.

Change-Id: I0f46aaee2b9e87f839e78b7978cdf1bb4239d6f5
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
This commit is contained in:
Jeremy Gebben
2012-03-23 14:05:59 -06:00
parent 80b6c0a555
commit 7faf9ecde6
2 changed files with 9 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/msm/kgsl_mmu.c
+7 -1
View File
@@ -605,7 +605,12 @@ kgsl_mmu_unmap(struct kgsl_pagetable *pagetable,
memdesc->gpuaddr & KGSL_MMU_ALIGN_MASK,
memdesc->size);
memdesc->gpuaddr = 0;
/*
* Don't clear the gpuaddr on global mappings because they
* may be in use by other pagetables
*/
if (!(memdesc->priv & KGSL_MEMFLAGS_GLOBAL))
memdesc->gpuaddr = 0;
return 0;
}
EXPORT_SYMBOL(kgsl_mmu_unmap);
@@ -637,6 +642,7 @@ int kgsl_mmu_map_global(struct kgsl_pagetable *pagetable,
gpuaddr, memdesc->gpuaddr);
goto error_unmap;
}
memdesc->priv |= KGSL_MEMFLAGS_GLOBAL;
return result;
error_unmap:
kgsl_mmu_unmap(pagetable, memdesc);
drivers/gpu/msm/kgsl_sharedmem.h
+2
View File
@@ -29,6 +29,8 @@ struct kgsl_process_private;
/** Set if the memdesc describes cached memory */
#define KGSL_MEMFLAGS_CACHED 0x00000001
/** Set if the memdesc is mapped into all pagetables */
#define KGSL_MEMFLAGS_GLOBAL 0x00000002
struct kgsl_memdesc_ops {
int (*vmflags)(struct kgsl_memdesc *);