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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue 

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2016-04-13

This series contains updates to i40e, i40evf and fm10k.

Alex fixes a bug introduced earlier based on his interpretation of the
XL710 datasheet.  The actual limit for fragments with TSO and a skbuff
that has payload data in the header portion of the buffer is actually
only 7 fragments and the skb-data portion counts as 2 buffers, one for
the TSO header, and the one for a segment payload buffer.

Jacob fixes a bug where in a previous refactor of the code broke
multi-bit updates for VFs.  The problem occurs because a multi-bit
request has a non-zero length, and the PF would simply drop any
request with the upper 16 bits set.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-04-14 00:31:45 -04:00
parent d6d5e999e5 f808c5dbcd
commit 41015e89d9
5 changed files with 84 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/ethernet/intel/fm10k/fm10k_pf.c
View File

@ -1223,18 +1223,32 @@ s32 fm10k_iov_msg_mac_vlan_pf(struct fm10k_hw *hw, u32 **results,
if (err)
return err;
/* verify upper 16 bits are zero */
if (vid >> 16)
return FM10K_ERR_PARAM;
set = !(vid & FM10K_VLAN_CLEAR);
vid &= ~FM10K_VLAN_CLEAR;
err = fm10k_iov_select_vid(vf_info, (u16)vid);
if (err < 0)
return err;
/* if the length field has been set, this is a multi-bit
* update request. For multi-bit requests, simply disallow
* them when the pf_vid has been set. In this case, the PF
* should have already cleared the VLAN_TABLE, and if we
* allowed them, it could allow a rogue VF to receive traffic
* on a VLAN it was not assigned. In the single-bit case, we
* need to modify requests for VLAN 0 to use the default PF or
* SW vid when assigned.
*/
vid = err;
if (vid >> 16) {
/* prevent multi-bit requests when PF has
* administratively set the VLAN for this VF
*/
if (vf_info->pf_vid)
return FM10K_ERR_PARAM;
} else {
err = fm10k_iov_select_vid(vf_info, (u16)vid);
if (err < 0)
return err;
vid = err;
}
/* update VSI info for VF in regards to VLAN table */
err = hw->mac.ops.update_vlan(hw, vid, vf_info->vsi, set);

49
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View File

@ -2594,35 +2594,34 @@ int __i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size)
}
/**
* __i40e_chk_linearize - Check if there are more than 8 fragments per packet
* __i40e_chk_linearize - Check if there are more than 8 buffers per packet
* @skb: send buffer
*
* Note: Our HW can't scatter-gather more than 8 fragments to build
* a packet on the wire and so we need to figure out the cases where we
* need to linearize the skb.
* Note: Our HW can't DMA more than 8 buffers to build a packet on the wire
* and so we need to figure out the cases where we need to linearize the skb.
*
* For TSO we need to count the TSO header and segment payload separately.
* As such we need to check cases where we have 7 fragments or more as we
* can potentially require 9 DMA transactions, 1 for the TSO header, 1 for
* the segment payload in the first descriptor, and another 7 for the
* fragments.
**/
bool __i40e_chk_linearize(struct sk_buff *skb)
{
const struct skb_frag_struct *frag, *stale;
int gso_size, nr_frags, sum;
int nr_frags, sum;
/* check to see if TSO is enabled, if so we may get a repreive */
gso_size = skb_shinfo(skb)->gso_size;
if (unlikely(!gso_size))
return true;
/* no need to check if number of frags is less than 8 */
/* no need to check if number of frags is less than 7 */
nr_frags = skb_shinfo(skb)->nr_frags;
if (nr_frags < I40E_MAX_BUFFER_TXD)
if (nr_frags < (I40E_MAX_BUFFER_TXD - 1))
return false;
/* We need to walk through the list and validate that each group
* of 6 fragments totals at least gso_size. However we don't need
* to perform such validation on the first or last 6 since the first
* 6 cannot inherit any data from a descriptor before them, and the
* last 6 cannot inherit any data from a descriptor after them.
* to perform such validation on the last 6 since the last 6 cannot
* inherit any data from a descriptor after them.
*/
nr_frags -= I40E_MAX_BUFFER_TXD - 1;
nr_frags -= I40E_MAX_BUFFER_TXD - 2;
frag = &skb_shinfo(skb)->frags[0];
/* Initialize size to the negative value of gso_size minus 1. We
@ -2631,21 +2630,21 @@ bool __i40e_chk_linearize(struct sk_buff *skb)
* descriptors for a single transmit as the header and previous
* fragment are already consuming 2 descriptors.
*/
sum = 1 - gso_size;
sum = 1 - skb_shinfo(skb)->gso_size;
/* Add size of frags 1 through 5 to create our initial sum */
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
/* Add size of frags 0 through 4 to create our initial sum */
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
/* Walk through fragments adding latest fragment, testing it, and
* then removing stale fragments from the sum.
*/
stale = &skb_shinfo(skb)->frags[0];
for (;;) {
sum += skb_frag_size(++frag);
sum += skb_frag_size(frag++);
/* if sum is negative we failed to make sufficient progress */
if (sum < 0)
@ -2655,7 +2654,7 @@ bool __i40e_chk_linearize(struct sk_buff *skb)
if (!--nr_frags)
break;
sum -= skb_frag_size(++stale);
sum -= skb_frag_size(stale++);
}
return false;

10
drivers/net/ethernet/intel/i40e/i40e_txrx.h
View File

@ -413,10 +413,14 @@ static inline int i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size)
**/
static inline bool i40e_chk_linearize(struct sk_buff *skb, int count)
{
/* we can only support up to 8 data buffers for a single send */
if (likely(count <= I40E_MAX_BUFFER_TXD))
/* Both TSO and single send will work if count is less than 8 */
if (likely(count < I40E_MAX_BUFFER_TXD))
return false;
return __i40e_chk_linearize(skb);
if (skb_is_gso(skb))
return __i40e_chk_linearize(skb);
/* we can support up to 8 data buffers for a single send */
return count != I40E_MAX_BUFFER_TXD;
}
#endif /* _I40E_TXRX_H_ */

49
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
View File

@ -1796,35 +1796,34 @@ static void i40e_create_tx_ctx(struct i40e_ring *tx_ring,
}
/**
* __i40evf_chk_linearize - Check if there are more than 8 fragments per packet
* __i40evf_chk_linearize - Check if there are more than 8 buffers per packet
* @skb: send buffer
*
* Note: Our HW can't scatter-gather more than 8 fragments to build
* a packet on the wire and so we need to figure out the cases where we
* need to linearize the skb.
* Note: Our HW can't DMA more than 8 buffers to build a packet on the wire
* and so we need to figure out the cases where we need to linearize the skb.
*
* For TSO we need to count the TSO header and segment payload separately.
* As such we need to check cases where we have 7 fragments or more as we
* can potentially require 9 DMA transactions, 1 for the TSO header, 1 for
* the segment payload in the first descriptor, and another 7 for the
* fragments.
**/
bool __i40evf_chk_linearize(struct sk_buff *skb)
{
const struct skb_frag_struct *frag, *stale;
int gso_size, nr_frags, sum;
int nr_frags, sum;
/* check to see if TSO is enabled, if so we may get a repreive */
gso_size = skb_shinfo(skb)->gso_size;
if (unlikely(!gso_size))
return true;
/* no need to check if number of frags is less than 8 */
/* no need to check if number of frags is less than 7 */
nr_frags = skb_shinfo(skb)->nr_frags;
if (nr_frags < I40E_MAX_BUFFER_TXD)
if (nr_frags < (I40E_MAX_BUFFER_TXD - 1))
return false;
/* We need to walk through the list and validate that each group
* of 6 fragments totals at least gso_size. However we don't need
* to perform such validation on the first or last 6 since the first
* 6 cannot inherit any data from a descriptor before them, and the
* last 6 cannot inherit any data from a descriptor after them.
* to perform such validation on the last 6 since the last 6 cannot
* inherit any data from a descriptor after them.
*/
nr_frags -= I40E_MAX_BUFFER_TXD - 1;
nr_frags -= I40E_MAX_BUFFER_TXD - 2;
frag = &skb_shinfo(skb)->frags[0];
/* Initialize size to the negative value of gso_size minus 1. We
@ -1833,21 +1832,21 @@ bool __i40evf_chk_linearize(struct sk_buff *skb)
* descriptors for a single transmit as the header and previous
* fragment are already consuming 2 descriptors.
*/
sum = 1 - gso_size;
sum = 1 - skb_shinfo(skb)->gso_size;
/* Add size of frags 1 through 5 to create our initial sum */
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
sum += skb_frag_size(++frag);
/* Add size of frags 0 through 4 to create our initial sum */
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
sum += skb_frag_size(frag++);
/* Walk through fragments adding latest fragment, testing it, and
* then removing stale fragments from the sum.
*/
stale = &skb_shinfo(skb)->frags[0];
for (;;) {
sum += skb_frag_size(++frag);
sum += skb_frag_size(frag++);
/* if sum is negative we failed to make sufficient progress */
if (sum < 0)
@ -1857,7 +1856,7 @@ bool __i40evf_chk_linearize(struct sk_buff *skb)
if (!--nr_frags)
break;
sum -= skb_frag_size(++stale);
sum -= skb_frag_size(stale++);
}
return false;

10
drivers/net/ethernet/intel/i40evf/i40e_txrx.h
View File

@ -395,10 +395,14 @@ static inline int i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size)
**/
static inline bool i40e_chk_linearize(struct sk_buff *skb, int count)
{
/* we can only support up to 8 data buffers for a single send */
if (likely(count <= I40E_MAX_BUFFER_TXD))
/* Both TSO and single send will work if count is less than 8 */
if (likely(count < I40E_MAX_BUFFER_TXD))
return false;
return __i40evf_chk_linearize(skb);
if (skb_is_gso(skb))
return __i40evf_chk_linearize(skb);
/* we can support up to 8 data buffers for a single send */
return count != I40E_MAX_BUFFER_TXD;
}
#endif /* _I40E_TXRX_H_ */