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Date: Fri, 22 Jul 2016 23:49:48 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
guru.anbalagane@...cle.com,
Emil Tantilov <emil.s.tantilov@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 11/14] ixgbevf: Add range checking for setting MTU
From: Tony Nguyen <anthony.l.nguyen@...el.com>
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@...el.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 17 ++++++---
drivers/net/ethernet/intel/ixgbevf/vf.c | 42 +++++++++++++++--------
drivers/net/ethernet/intel/ixgbevf/vf.h | 2 +-
3 files changed, 40 insertions(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 201e482..d9d6616 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 cb409b3..4862bc2 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 e3a0dea..04d8d4e 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 {
--
2.5.5
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