diff options
| author | Laura Mihaela Vasilescu <laura.vasilescu@rosedu.org> | 2013-07-31 20:19:54 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2013-08-22 02:26:27 -0700 |
| commit | ed12cc9a145132f5e59919570adff84b318f6010 (patch) | |
| tree | ae6d7238a3927d368445db24fbe4898bb95a08d0 /drivers/net/ethernet/intel/igb/igb_main.c | |
| parent | c342b39ea7ca0e46e093cdb346bf52b2b4e71b01 (diff) | |
igb: Expose RSS indirection table for ethtool
This patch adds the ethtool callbacks necessary to change the RETA
indirection table from userspace.
In order to achieve this, we add the indirection table field (rss_indir_tbl)
in the board specific data structure (struct igb_adapter) to preserve the
values across hardware resets.
The indirection table must be initialized with default values in the
following cases:
* at module init time
* when the number of RX queues changes.
For this reason we add a new field (rss_indir_tbl_init) in igb_adapter
that keeps track of the number of RX queues. Whenever the number of RX
queues changes, the rss_indir_tbl is modified and initialized with default
values. The rss_indir_tbl_init is updated accordingly.
CC: Ben Hutchings <bhutchings@solarflare.com>
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>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 28 |
1 files changed, 7 insertions, 21 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 1acd9c06026..df33c4b8fa8 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -3126,7 +3126,7 @@ 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; + u32 j, num_rx_queues; static const u32 rsskey[10] = { 0xDA565A6D, 0xC20E5B25, 0x3D256741, 0xB08FA343, 0xCB2BCAD0, 0xB4307BAE, 0xA32DCB77, 0x0CF23080, 0x3BB7426A, @@ -3139,35 +3139,21 @@ static void igb_setup_mrqc(struct igb_adapter *adapter) num_rx_queues = adapter->rss_queues; switch (hw->mac.type) { - case e1000_82575: - shift = 6; - break; case e1000_82576: /* 82576 supports 2 RSS queues for SR-IOV */ - if (adapter->vfs_allocated_count) { - shift = 3; + if (adapter->vfs_allocated_count) num_rx_queues = 2; - } break; default: break; } - /* Populate the indirection table 4 entries at a time. To do this - * we are generating the results for n and n+2 and then interleaving - * those with the results with n+1 and n+3. - */ - for (j = 0; j < IGB_RETA_SIZE / 4; j++) { - /* first pass generates n and n+2 */ - u32 base = ((j * 0x00040004) + 0x00020000) * num_rx_queues; - u32 reta = (base & 0x07800780) >> (7 - shift); - - /* second pass generates n+1 and n+3 */ - base += 0x00010001 * num_rx_queues; - reta |= (base & 0x07800780) << (1 + shift); - - wr32(E1000_RETA(j), reta); + if (adapter->rss_indir_tbl_init != num_rx_queues) { + for (j = 0; j < IGB_RETA_SIZE; j++) + adapter->rss_indir_tbl[j] = (j * num_rx_queues) / IGB_RETA_SIZE; + adapter->rss_indir_tbl_init = num_rx_queues; } + igb_write_rss_indir_tbl(adapter); /* Disable raw packet checksumming so that RSS hash is placed in * descriptor on writeback. No need to enable TCP/UDP/IP checksum |