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: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 374f36b84513b8696147f325570197826ce86fe2..95c331abee438338244a6345322c2608e226ec4a 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/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;