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igb: Add macro for size of RETA indirection table 

RETA indirection table is used to assign the received data to a CPU
in order to maintain an efficient distribution of network receive
processing across multiple CPUs.

This patch removes the hard-coded value for the size of the indirection
table and defines a new macro.

Signed-off-by: Laura Mihaela Vasilescu <laura.vasilescu@rosedu.org>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Laura Mihaela Vasilescu 2013-07-31 20:19:48 +00:00 committed by Jeff Kirsher
parent 7dc98a6233
commit c342b39ea7
2 changed files with 3 additions and 1 deletions
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2
drivers/net/ethernet/intel/igb/igb.h
View File

@ -343,6 +343,8 @@ struct hwmon_buff {
}; };
#endif #endif
#define IGB_RETA_SIZE 128
/* board specific private data structure */ /* board specific private data structure */
struct igb_adapter { struct igb_adapter {
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];

2
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -3157,7 +3157,7 @@ static void igb_setup_mrqc(struct igb_adapter *adapter)
* we are generating the results for n and n+2 and then interleaving * we are generating the results for n and n+2 and then interleaving
* those with the results with n+1 and n+3. * those with the results with n+1 and n+3.
*/ */
for (j = 0; j < 32; j++) { for (j = 0; j < IGB_RETA_SIZE / 4; j++) {
/* first pass generates n and n+2 */ /* first pass generates n and n+2 */
u32 base = ((j * 0x00040004) + 0x00020000) * num_rx_queues; u32 base = ((j * 0x00040004) + 0x00020000) * num_rx_queues;
u32 reta = (base & 0x07800780) >> (7 - shift); u32 reta = (base & 0x07800780) >> (7 - shift);