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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 <anthony.l.nguyen@intel.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Tony Nguyen 2016-07-13 10:33:16 -07:00 committed by Jeff Kirsher
parent 6e469ed03e
commit 6a11e52b69
3 changed files with 40 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View File

@ -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;
}

42
drivers/net/ethernet/intel/ixgbevf/vf.c
View File

@ -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;
}
/**

2
drivers/net/ethernet/intel/ixgbevf/vf.h
View File

@ -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 {