habanalabs: restructure hl_mmap (3174ac9b) · Commits · 戴 / test

drivers/misc/habanalabs/common/command_buffer.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -183,7 +183,7 @@ int hl_cb_create(struct hl_device hdev, struct hl_cb_mgr mgr,
		* idr is 32-bit so we can safely OR it with a mask that is above
		* 32 bit
		*/
		*handle = cb->id \| HL_MMAP_CB_MASK;
		*handle = cb->id \| HL_MMAP_TYPE_CB;
		*handle <<= PAGE_SHIFT;

		hl_debugfs_add_cb(cb);

+6 −2

Original line number	Diff line number	Diff line
		@@ -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);
		}

+13 −1

Original line number	Diff line number	Diff line
		@@ -22,7 +22,19 @@

		#define HL_NAME "habanalabs"

		#define HL_MMAP_CB_MASK (0x8000000000000000ull >> PAGE_SHIFT)
		/* Use upper bits of mmap offset to store habana driver specific information.
		* bits[63:62] - Encode mmap type
		* bits[45:0] - mmap offset value
		*
		* NOTE: struct vm_area_struct.vm_pgoff uses offset in pages. Hence, these
		* defines are w.r.t to PAGE_SIZE
		*/
		#define HL_MMAP_TYPE_SHIFT (62 - PAGE_SHIFT)
		#define HL_MMAP_TYPE_MASK (0x3ull << HL_MMAP_TYPE_SHIFT)
		#define HL_MMAP_TYPE_CB (0x2ull << HL_MMAP_TYPE_SHIFT)

		#define HL_MMAP_OFFSET_VALUE_MASK (0x3FFFFFFFFFFFull >> PAGE_SHIFT)
		#define HL_MMAP_OFFSET_VALUE_GET(off) (off & HL_MMAP_OFFSET_VALUE_MASK)

		#define HL_PENDING_RESET_PER_SEC 30