i40e: workaround NVM GLQF_HKEY

The NVM wasn't filling in the GLQF_HKEY register on
some old NVM versions.  If this is the case, fill
in some values so receive with flow rules works right.

Change-ID: Ic737888ee68f96efb4cf8a1a49d2301615e09ed2
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -5463,6 +5463,20 @@ static void i40e_fdir_sb_setup(struct i40e_pf *pf)
 	struct i40e_vsi *vsi;
 	int i;
 
+	/* quick workaround for an NVM issue that leaves a critical register
+	 * uninitialized
+	 */
+	if (!rd32(&pf->hw, I40E_GLQF_HKEY(0))) {
+		static const u32 hkey[] = {
+			0xe640d33f, 0xcdfe98ab, 0x73fa7161, 0x0d7a7d36,
+			0xeacb7d61, 0xaa4f05b6, 0x9c5c89ed, 0xfc425ddb,
+			0xa4654832, 0xfc7461d4, 0x8f827619, 0xf5c63c21,
+			0x95b3a76d};
+
+		for (i = 0; i <= I40E_GLQF_HKEY_MAX_INDEX; i++)
+			wr32(&pf->hw, I40E_GLQF_HKEY(i), hkey[i]);
+	}
+
 	if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
 		return;