From c14db20259ccb623171d4b788e51dd3e8df901d7 Mon Sep 17 00:00:00 2001 From: Yuval Mintz Date: Sun, 12 Jan 2014 14:37:59 +0200 Subject: bnx2x: Correct default Tx switching behaviour With this patch bnx2x will configure the PF to perform Tx switching on out-going traffic as soon as SR-IOV is dynamically enabled and de-activate it when it is disabled. This will allow VFs to communicate with their parent PFs. Signed-off-by: Yuval Mintz Signed-off-by: Ariel Elior Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnx2x/bnx2x.h | 1 + drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 3 ++ drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c | 7 +++ drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h | 4 +- drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 61 +++++++++++++++++++++++ 5 files changed, 75 insertions(+), 1 deletion(-) (limited to 'drivers/net/ethernet/broadcom') diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h index 9819a548e3b9..391f29ef6d2e 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h @@ -1566,6 +1566,7 @@ struct bnx2x { #define NO_ISCSI_FLAG (1 << 14) #define NO_FCOE_FLAG (1 << 15) #define BC_SUPPORTS_PFC_STATS (1 << 17) +#define TX_SWITCHING (1 << 18) #define BC_SUPPORTS_FCOE_FEATURES (1 << 19) #define USING_SINGLE_MSIX_FLAG (1 << 20) #define BC_SUPPORTS_DCBX_MSG_NON_PMF (1 << 21) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c index f90079acb58c..cf17b660b4ee 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c @@ -3007,6 +3007,9 @@ static unsigned long bnx2x_get_common_flags(struct bnx2x *bp, if (zero_stats) __set_bit(BNX2X_Q_FLG_ZERO_STATS, &flags); + if (bp->flags & TX_SWITCHING) + __set_bit(BNX2X_Q_FLG_TX_SWITCH, &flags); + __set_bit(BNX2X_Q_FLG_PCSUM_ON_PKT, &flags); __set_bit(BNX2X_Q_FLG_TUN_INC_INNER_IP_ID, &flags); diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c index 9373584e400f..0fb6ff2ac8e3 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c @@ -4728,6 +4728,13 @@ static void bnx2x_q_fill_update_data(struct bnx2x *bp, test_bit(BNX2X_Q_UPDATE_SILENT_VLAN_REM, ¶ms->update_flags); data->silent_vlan_value = cpu_to_le16(params->silent_removal_value); data->silent_vlan_mask = cpu_to_le16(params->silent_removal_mask); + + /* tx switching */ + data->tx_switching_flg = + test_bit(BNX2X_Q_UPDATE_TX_SWITCHING, ¶ms->update_flags); + data->tx_switching_change_flg = + test_bit(BNX2X_Q_UPDATE_TX_SWITCHING_CHNG, + ¶ms->update_flags); } static inline int bnx2x_q_send_update(struct bnx2x *bp, diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h index c8b939b141de..00d7f214a40a 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h @@ -767,7 +767,9 @@ enum { BNX2X_Q_UPDATE_DEF_VLAN_EN, BNX2X_Q_UPDATE_DEF_VLAN_EN_CHNG, BNX2X_Q_UPDATE_SILENT_VLAN_REM_CHNG, - BNX2X_Q_UPDATE_SILENT_VLAN_REM + BNX2X_Q_UPDATE_SILENT_VLAN_REM, + BNX2X_Q_UPDATE_TX_SWITCHING_CHNG, + BNX2X_Q_UPDATE_TX_SWITCHING }; /* Allowed Queue states */ diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c index 208636d05cc0..d0e246b8a871 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c @@ -3130,6 +3130,60 @@ void bnx2x_unlock_vf_pf_channel(struct bnx2x *bp, struct bnx2x_virtf *vf, vf->abs_vfid, vf->op_current); } +static int bnx2x_set_pf_tx_switching(struct bnx2x *bp, bool enable) +{ + struct bnx2x_queue_state_params q_params; + u32 prev_flags; + int i, rc; + + /* Verify changes are needed and record current Tx switching state */ + prev_flags = bp->flags; + if (enable) + bp->flags |= TX_SWITCHING; + else + bp->flags &= ~TX_SWITCHING; + if (prev_flags == bp->flags) + return 0; + + /* Verify state enables the sending of queue ramrods */ + if ((bp->state != BNX2X_STATE_OPEN) || + (bnx2x_get_q_logical_state(bp, + &bnx2x_sp_obj(bp, &bp->fp[0]).q_obj) != + BNX2X_Q_LOGICAL_STATE_ACTIVE)) + return 0; + + /* send q. update ramrod to configure Tx switching */ + memset(&q_params, 0, sizeof(q_params)); + __set_bit(RAMROD_COMP_WAIT, &q_params.ramrod_flags); + q_params.cmd = BNX2X_Q_CMD_UPDATE; + __set_bit(BNX2X_Q_UPDATE_TX_SWITCHING_CHNG, + &q_params.params.update.update_flags); + if (enable) + __set_bit(BNX2X_Q_UPDATE_TX_SWITCHING, + &q_params.params.update.update_flags); + else + __clear_bit(BNX2X_Q_UPDATE_TX_SWITCHING, + &q_params.params.update.update_flags); + + /* send the ramrod on all the queues of the PF */ + for_each_eth_queue(bp, i) { + struct bnx2x_fastpath *fp = &bp->fp[i]; + + /* Set the appropriate Queue object */ + q_params.q_obj = &bnx2x_sp_obj(bp, fp).q_obj; + + /* Update the Queue state */ + rc = bnx2x_queue_state_change(bp, &q_params); + if (rc) { + BNX2X_ERR("Failed to configure Tx switching\n"); + return rc; + } + } + + DP(BNX2X_MSG_IOV, "%s Tx Switching\n", enable ? "Enabled" : "Disabled"); + return 0; +} + int bnx2x_sriov_configure(struct pci_dev *dev, int num_vfs_param) { struct bnx2x *bp = netdev_priv(pci_get_drvdata(dev)); @@ -3157,12 +3211,14 @@ int bnx2x_sriov_configure(struct pci_dev *dev, int num_vfs_param) bp->requested_nr_virtfn = num_vfs_param; if (num_vfs_param == 0) { + bnx2x_set_pf_tx_switching(bp, false); pci_disable_sriov(dev); return 0; } else { return bnx2x_enable_sriov(bp); } } + #define IGU_ENTRY_SIZE 4 int bnx2x_enable_sriov(struct bnx2x *bp) @@ -3240,6 +3296,11 @@ int bnx2x_enable_sriov(struct bnx2x *bp) */ DP(BNX2X_MSG_IOV, "about to call enable sriov\n"); bnx2x_disable_sriov(bp); + + rc = bnx2x_set_pf_tx_switching(bp, true); + if (rc) + return rc; + rc = pci_enable_sriov(bp->pdev, req_vfs); if (rc) { BNX2X_ERR("pci_enable_sriov failed with %d\n", rc); -- cgit v1.2.3