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igb: Simplify how we populate the RSS key 

Instead of storing the RSS key as a character array we can simplify the
configuration by making it a u32 array.  This allows us to just write one
value per register without any unnecessary operations to construct the
value.

This change will produce the same exact key, the only difference is that I
translated the u8 array to a u32 array which will be correctly ordered on
writes to hardware by the cpu_to_le32 operations that are built into the
writel calls.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2012-09-13 06:28:16 +00:00 committed by Jeff Kirsher
parent 797fd4be7b
commit a57fe23e24
1 changed files with 6 additions and 12 deletions
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18
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -2835,20 +2835,14 @@ static void igb_setup_mrqc(struct igb_adapter *adapter)
struct e1000_hw *hw = &adapter->hw;
u32 mrqc, rxcsum;
u32 j, num_rx_queues, shift = 0;
static const u8 rsshash[40] = {
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, 0x41, 0x67,
0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, 0xd0, 0xca, 0x2b, 0xcb,
0xae, 0x7b, 0x30, 0xb4, 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30,
0xf2, 0x0c, 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa };
static const u32 rsskey[10] = { 0xDA565A6D, 0xC20E5B25, 0x3D256741,
0xB08FA343, 0xCB2BCAD0, 0xB4307BAE,
0xA32DCB77, 0x0CF23080, 0x3BB7426A,
0xFA01ACBE };
/* Fill out hash function seeds */
for (j = 0; j < 10; j++) {
u32 rsskey = rsshash[(j * 4)];
rsskey |= rsshash[(j * 4) + 1] << 8;
rsskey |= rsshash[(j * 4) + 2] << 16;
rsskey |= rsshash[(j * 4) + 3] << 24;
array_wr32(E1000_RSSRK(0), j, rsskey);
}
for (j = 0; j < 10; j++)
wr32(E1000_RSSRK(j), rsskey[j]);
num_rx_queues = adapter->rss_queues;