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Diffstat (limited to 'meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0825-drm-amdgpu-Make-amdgpu_ttm_tt_get_user_pages-work-in.patch')
-rw-r--r--meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0825-drm-amdgpu-Make-amdgpu_ttm_tt_get_user_pages-work-in.patch51
1 files changed, 51 insertions, 0 deletions
diff --git a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0825-drm-amdgpu-Make-amdgpu_ttm_tt_get_user_pages-work-in.patch b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0825-drm-amdgpu-Make-amdgpu_ttm_tt_get_user_pages-work-in.patch
new file mode 100644
index 00000000..f8fbb503
--- /dev/null
+++ b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/0825-drm-amdgpu-Make-amdgpu_ttm_tt_get_user_pages-work-in.patch
@@ -0,0 +1,51 @@
+From 83f520bbb6648732ee0329d218cb007ed58680cd Mon Sep 17 00:00:00 2001
+From: Felix Kuehling <Felix.Kuehling@amd.com>
+Date: Fri, 15 Jan 2016 16:19:12 -0500
+Subject: [PATCH 0825/4131] drm/amdgpu: Make amdgpu_ttm_tt_get_user_pages work
+ in kernel thread
+
+For HSA userptr support, a kernel worker thread must be able to
+re-pin a userptr BO after an MMU notifier unpinned it. Store the
+user task_struct in amdgpu_ttm_tt and use that task and its
+mm_struct instead of the current thread's.
+
+Change-Id: I3ba20fc9c489ad598c9706cf0b64231a18a0ec9f
+Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+index a80d9cb..f81146b 100644
+--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+@@ -657,7 +657,7 @@ struct amdgpu_ttm_tt {
+ struct amdgpu_device *adev;
+ u64 offset;
+ uint64_t userptr;
+- struct mm_struct *usermm;
++ struct task_struct *usertask;
+ uint32_t userflags;
+ spinlock_t guptasklock;
+ struct list_head guptasks;
+@@ -681,7 +681,7 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
+ unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
+ struct vm_area_struct *vma;
+
+- vma = find_vma(gtt->usermm, gtt->userptr);
++ vma = find_vma(gtt->usertask->mm, gtt->userptr);
+ if (!vma || vma->vm_file || vma->vm_end < end)
+ return -EPERM;
+ }
+@@ -1041,7 +1041,7 @@ int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
+ return -EINVAL;
+
+ gtt->userptr = addr;
+- gtt->usermm = current->mm;
++ gtt->usertask = current;
+ gtt->userflags = flags;
+ spin_lock_init(&gtt->guptasklock);
+ INIT_LIST_HEAD(&gtt->guptasks);
+--
+2.7.4
+