From: Tony Nguyen Date: Wed, 13 Jul 2016 17:33:16 +0000 (-0700) Subject: ixgbevf: Add range checking for setting MTU X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6a11e52b6995b07a83a7d50e6301025ca35501be;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ixgbevf: Add range checking for setting MTU Currently when setting the VF's MTU, the PF can return a NACK but this isn't passed on to the VF. Propagate the results from the PF to the VF so errors can be reported. In ixgbevf_change_mtu, return an error and reject the change. For ixgbevf_configure_rx, log the error for debugging purposes since the function is buried in a series of Rx config routines that are void. Signed-off-by: Tony Nguyen Signed-off-by: Emil Tantilov Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 201e48215c01..d9d6616f02a4 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -1802,16 +1802,19 @@ static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter, **/ static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter) { - int i; struct ixgbe_hw *hw = &adapter->hw; struct net_device *netdev = adapter->netdev; + int i, ret; ixgbevf_setup_psrtype(adapter); if (hw->mac.type >= ixgbe_mac_X550_vf) ixgbevf_setup_vfmrqc(adapter); /* notify the PF of our intent to use this size of frame */ - hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN); + ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN); + if (ret) + dev_err(&adapter->pdev->dev, + "Failed to set MTU at %d\n", netdev->mtu); /* Setup the HW Rx Head and Tail Descriptor Pointers and * the Base and Length of the Rx Descriptor Ring @@ -3737,6 +3740,7 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) struct ixgbe_hw *hw = &adapter->hw; int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE; + int ret; switch (adapter->hw.api_version) { case ixgbe_mbox_api_11: @@ -3753,14 +3757,17 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) if ((new_mtu < 68) || (max_frame > max_possible_frame)) return -EINVAL; + /* notify the PF of our intent to use this size of frame */ + ret = hw->mac.ops.set_rlpml(hw, max_frame); + if (ret) + return -EINVAL; + hw_dbg(hw, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); + /* must set new MTU before calling down or up */ netdev->mtu = new_mtu; - /* notify the PF of our intent to use this size of frame */ - hw->mac.ops.set_rlpml(hw, max_frame); - return 0; } diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c index cb409b3a31ff..4862bc2fa968 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.c +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -33,6 +33,18 @@ */ #define IXGBE_HV_RESET_OFFSET 0x201 +static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg, + u32 *retmsg, u16 size) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 retval = mbx->ops.write_posted(hw, msg, size); + + if (retval) + return retval; + + return mbx->ops.read_posted(hw, retmsg, size); +} + /** * ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx * @hw: pointer to hardware structure @@ -470,17 +482,6 @@ static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr, return -EOPNOTSUPP; } -static void ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, - u32 *msg, u16 size) -{ - struct ixgbe_mbx_info *mbx = &hw->mbx; - u32 retmsg[IXGBE_VFMAILBOX_SIZE]; - s32 retval = mbx->ops.write_posted(hw, msg, size); - - if (!retval) - mbx->ops.read_posted(hw, retmsg, size); -} - /** * ixgbevf_update_mc_addr_list_vf - Update Multicast addresses * @hw: pointer to the HW structure @@ -521,7 +522,7 @@ static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw, vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr); } - ixgbevf_write_msg_read_ack(hw, msgbuf, IXGBE_VFMAILBOX_SIZE); + ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, IXGBE_VFMAILBOX_SIZE); return 0; } @@ -799,13 +800,22 @@ out: * @hw: pointer to the HW structure * @max_size: value to assign to max frame size **/ -static void ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) +static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) { u32 msgbuf[2]; + s32 ret_val; msgbuf[0] = IXGBE_VF_SET_LPE; msgbuf[1] = max_size; - ixgbevf_write_msg_read_ack(hw, msgbuf, 2); + + ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2); + if (ret_val) + return ret_val; + if ((msgbuf[0] & IXGBE_VF_SET_LPE) && + (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK)) + return IXGBE_ERR_MBX; + + return 0; } /** @@ -814,7 +824,7 @@ static void ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) * @max_size: value to assign to max frame size * Hyper-V variant. **/ -static void ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) +static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) { u32 reg; @@ -825,6 +835,8 @@ static void ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size) /* CRC == 4 */ reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN); IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg); + + return 0; } /** diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h index e3a0dea3d659..04d8d4ee4f04 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.h +++ b/drivers/net/ethernet/intel/ixgbevf/vf.h @@ -69,7 +69,7 @@ struct ixgbe_mac_operations { s32 (*disable_mc)(struct ixgbe_hw *); s32 (*clear_vfta)(struct ixgbe_hw *); s32 (*set_vfta)(struct ixgbe_hw *, u32, u32, bool); - void (*set_rlpml)(struct ixgbe_hw *, u16); + s32 (*set_rlpml)(struct ixgbe_hw *, u16); }; enum ixgbe_mac_type {