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| author | Kiran Patil <kiran.patil@intel.com> | 2020-07-30 03:19:17 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-08-01 18:44:04 +0300 |
| commit | 0a37abfa017a90cf0708f69022368cca6869416f (patch) | |
| tree | 43a7c30e087a2a8a22ac1b1d1e04fed210339977 /drivers/net/ethernet/intel | |
| parent | f34f55557ac9a4dfbfbf36c70585d1648ab5cd90 (diff) | |
| download | linux-0a37abfa017a90cf0708f69022368cca6869416f.tar.xz | |
ice: port fix for chk_linearlize
This is a port of commit 248de22e638f ("i40e/i40evf: Account for frags
split over multiple descriptors in check linearize")
As part of testing workloads (read/write) using larger IO size (128K)
tx_timeout is observed and whenever it happens, it was due to
tx_linearize.
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_txrx.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index 53c67eeec2fa..77de8869e7ca 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -2292,10 +2292,30 @@ static bool __ice_chk_linearize(struct sk_buff *skb) /* Walk through fragments adding latest fragment, testing it, and * then removing stale fragments from the sum. */ - stale = &skb_shinfo(skb)->frags[0]; - for (;;) { + for (stale = &skb_shinfo(skb)->frags[0];; stale++) { + int stale_size = skb_frag_size(stale); + sum += skb_frag_size(frag++); + /* The stale fragment may present us with a smaller + * descriptor than the actual fragment size. To account + * for that we need to remove all the data on the front and + * figure out what the remainder would be in the last + * descriptor associated with the fragment. + */ + if (stale_size > ICE_MAX_DATA_PER_TXD) { + int align_pad = -(skb_frag_off(stale)) & + (ICE_MAX_READ_REQ_SIZE - 1); + + sum -= align_pad; + stale_size -= align_pad; + + do { + sum -= ICE_MAX_DATA_PER_TXD_ALIGNED; + stale_size -= ICE_MAX_DATA_PER_TXD_ALIGNED; + } while (stale_size > ICE_MAX_DATA_PER_TXD); + } + /* if sum is negative we failed to make sufficient progress */ if (sum < 0) return true; @@ -2303,7 +2323,7 @@ static bool __ice_chk_linearize(struct sk_buff *skb) if (!nr_frags--) break; - sum -= skb_frag_size(stale++); + sum -= stale_size; } return false; |