From a94bceb1e30bc0cde391d9d2d3297995a3800412 Mon Sep 17 00:00:00 2001 From: Qi Zhang Date: Wed, 8 Mar 2017 01:19:03 -0500 Subject: [PATCH] net/fm10k/base: improve re-map queues handle Avoid potential FUM fault errors on a VF when updating MAC address and VLAN information. Only use the register flow when the mailbox is disconnected, by checking if the enqueue_tx returns FM10K_MBX_ERR_NO_MBX. If the mailbox message can be sent, there is no reason to bother with the register writes which are only intended to be used during VF driver initialization. Signed-off-by: Qi Zhang --- drivers/net/fm10k/base/fm10k_common.c | 3 ++ drivers/net/fm10k/base/fm10k_pf.c | 42 ++++++++++++++++++--------- 2 files changed, 32 insertions(+), 13 deletions(-) diff --git a/drivers/net/fm10k/base/fm10k_common.c b/drivers/net/fm10k/base/fm10k_common.c index 7acc1baefd..29f35d7d91 100644 --- a/drivers/net/fm10k/base/fm10k_common.c +++ b/drivers/net/fm10k/base/fm10k_common.c @@ -230,6 +230,9 @@ s32 fm10k_disable_queues_generic(struct fm10k_hw *hw, u16 q_cnt) /* clear tx_ready to prevent any false hits for reset */ hw->mac.tx_ready = false; + if (FM10K_REMOVED(hw->hw_addr)) + return FM10K_SUCCESS; + /* clear the enable bit for all rings */ for (i = 0; i < q_cnt; i++) { reg = FM10K_READ_REG(hw, FM10K_TXDCTL(i)); diff --git a/drivers/net/fm10k/base/fm10k_pf.c b/drivers/net/fm10k/base/fm10k_pf.c index bce29134a9..5b1098e975 100644 --- a/drivers/net/fm10k/base/fm10k_pf.c +++ b/drivers/net/fm10k/base/fm10k_pf.c @@ -926,9 +926,35 @@ STATIC s32 fm10k_iov_assign_default_mac_vlan_pf(struct fm10k_hw *hw, fm10k_tlv_attr_put_mac_vlan(msg, FM10K_MAC_VLAN_MSG_DEFAULT_MAC, vf_info->mac, vf_vid); - /* load onto outgoing mailbox, ignore any errors on enqueue */ - if (vf_info->mbx.ops.enqueue_tx) - vf_info->mbx.ops.enqueue_tx(hw, &vf_info->mbx, msg); + /* Configure Queue control register with new VLAN ID. The TXQCTL + * register is RO from the VF, so the PF must do this even in the + * case of notifying the VF of a new VID via the mailbox. + */ + txqctl = ((u32)vf_vid << FM10K_TXQCTL_VID_SHIFT) & + FM10K_TXQCTL_VID_MASK; + txqctl |= (vf_idx << FM10K_TXQCTL_TC_SHIFT) | + FM10K_TXQCTL_VF | vf_idx; + + for (i = 0; i < queues_per_pool; i++) + FM10K_WRITE_REG(hw, FM10K_TXQCTL(vf_q_idx + i), txqctl); + + /* try loading a message onto outgoing mailbox first */ + if (vf_info->mbx.ops.enqueue_tx) { + err = vf_info->mbx.ops.enqueue_tx(hw, &vf_info->mbx, msg); + if (err != FM10K_MBX_ERR_NO_MBX) + return err; + err = FM10K_SUCCESS; + } + + /* If we aren't connected to a mailbox, this is most likely because + * the VF driver is not running. It should thus be safe to re-map + * queues and use the registers to pass the MAC address so that the VF + * driver gets correct information during its initialization. + */ + + /* MAP Tx queue back to 0 temporarily, and disable it */ + FM10K_WRITE_REG(hw, FM10K_TQMAP(qmap_idx), 0); + FM10K_WRITE_REG(hw, FM10K_TXDCTL(vf_q_idx), 0); /* verify ring has disabled before modifying base address registers */ txdctl = FM10K_READ_REG(hw, FM10K_TXDCTL(vf_q_idx)); @@ -967,16 +993,6 @@ STATIC s32 fm10k_iov_assign_default_mac_vlan_pf(struct fm10k_hw *hw, FM10K_TDLEN_ITR_SCALE_SHIFT); err_out: - /* configure Queue control register */ - txqctl = ((u32)vf_vid << FM10K_TXQCTL_VID_SHIFT) & - FM10K_TXQCTL_VID_MASK; - txqctl |= (vf_idx << FM10K_TXQCTL_TC_SHIFT) | - FM10K_TXQCTL_VF | vf_idx; - - /* assign VLAN ID */ - for (i = 0; i < queues_per_pool; i++) - FM10K_WRITE_REG(hw, FM10K_TXQCTL(vf_q_idx + i), txqctl); - /* restore the queue back to VF ownership */ FM10K_WRITE_REG(hw, FM10K_TQMAP(qmap_idx), vf_q_idx); return err; -- 2.20.1