diff options
author | Yi Zou <yi.zou@intel.com> | 2009-11-06 12:56:00 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-11-07 04:33:36 (GMT) |
commit | 26f23d82dd8eae6dcc2ab99c04a9256089576a73 (patch) | |
tree | e6e45270aacab63c8127e73fc8a50eb88cc56fea /drivers/net | |
parent | b352e40da8977253f49850a24f6448653a459ac0 (diff) | |
download | linux-fsl-qoriq-26f23d82dd8eae6dcc2ab99c04a9256089576a73.tar.xz |
ixgbe: Fix checking TFCS register for TXOFF status when DCB is enabled
When DCB is enabled, the ixgbe_check_tx_hang() should check the corresponding
TC's TXOFF in TFCS based on the TC that the tx ring belongs to. Adds a
function to map from the tx_ring hw reg_idx to the correspodning TC and read
TFCS accordingly.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 26fc1df..2d0f618 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -226,6 +226,56 @@ static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter, /* tx_buffer_info must be completely set up in the transmit path */ } +/** + * ixgbe_tx_is_paused - check if the tx ring is paused + * @adapter: the ixgbe adapter + * @tx_ring: the corresponding tx_ring + * + * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the + * corresponding TC of this tx_ring when checking TFCS. + * + * Returns : true if paused + */ +static inline bool ixgbe_tx_is_paused(struct ixgbe_adapter *adapter, + struct ixgbe_ring *tx_ring) +{ + int tc; + u32 txoff = IXGBE_TFCS_TXOFF; + +#ifdef CONFIG_IXGBE_DCB + if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) { + int reg_idx = tx_ring->reg_idx; + int dcb_i = adapter->ring_feature[RING_F_DCB].indices; + + if (adapter->hw.mac.type == ixgbe_mac_82598EB) { + tc = reg_idx >> 2; + txoff = IXGBE_TFCS_TXOFF0; + } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) { + tc = 0; + txoff = IXGBE_TFCS_TXOFF; + if (dcb_i == 8) { + /* TC0, TC1 */ + tc = reg_idx >> 5; + if (tc == 2) /* TC2, TC3 */ + tc += (reg_idx - 64) >> 4; + else if (tc == 3) /* TC4, TC5, TC6, TC7 */ + tc += 1 + ((reg_idx - 96) >> 3); + } else if (dcb_i == 4) { + /* TC0, TC1 */ + tc = reg_idx >> 6; + if (tc == 1) { + tc += (reg_idx - 64) >> 5; + if (tc == 2) /* TC2, TC3 */ + tc += (reg_idx - 96) >> 4; + } + } + } + txoff <<= tc; + } +#endif + return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff; +} + static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter, struct ixgbe_ring *tx_ring, unsigned int eop) @@ -237,7 +287,7 @@ static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter, adapter->detect_tx_hung = false; if (tx_ring->tx_buffer_info[eop].time_stamp && time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) && - !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) { + !ixgbe_tx_is_paused(adapter, tx_ring)) { /* detected Tx unit hang */ union ixgbe_adv_tx_desc *tx_desc; tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); |