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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2020-08-29 10:51:39 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-09-22 17:49:51 +0200 |
| commit | 3174ac9bb1045946ff563aa01d679809e87fb2db (patch) | |
| tree | 19b93d14a98445319a8c790c4a6b12b9a21ef52d /drivers/misc/habanalabs/common/device.c | |
| parent | habanalabs: cast to u64 before shift > 31 bits (diff) | |
| download | linux-3174ac9bb1045946ff563aa01d679809e87fb2db.tar.xz linux-3174ac9bb1045946ff563aa01d679809e87fb2db.zip | |
habanalabs: restructure hl_mmap
Arrange the hl_mmap code to be more structured and expandable for the
future. Add better defines that describe our usage of the vm_pgoff.
Note that I shamelessly took the code and defines from the amdkfd driver
(my previous driver).
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/misc/habanalabs/common/device.c')
| -rw-r--r-- | drivers/misc/habanalabs/common/device.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c index 6e916cc22a4c..aa7fa9e94651 100644 --- a/drivers/misc/habanalabs/common/device.c +++ b/drivers/misc/habanalabs/common/device.c @@ -123,9 +123,13 @@ static int hl_device_release_ctrl(struct inode *inode, struct file *filp) static int hl_mmap(struct file *filp, struct vm_area_struct *vma) { struct hl_fpriv *hpriv = filp->private_data; + unsigned long vm_pgoff; - if ((vma->vm_pgoff & HL_MMAP_CB_MASK) == HL_MMAP_CB_MASK) { - vma->vm_pgoff ^= HL_MMAP_CB_MASK; + vm_pgoff = vma->vm_pgoff; + vma->vm_pgoff = HL_MMAP_OFFSET_VALUE_GET(vm_pgoff); + + switch (vm_pgoff & HL_MMAP_TYPE_MASK) { + case HL_MMAP_TYPE_CB: return hl_cb_mmap(hpriv, vma); } |