| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20180226180756.10736-9-jeffrey.t.kirsher@intel.com>
Date: Mon, 26 Feb 2018 10:07:51 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Emil Tantilov <emil.s.tantilov@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 08/13] ixgbevf: add support for padding packet
From: Emil Tantilov <emil.s.tantilov@...el.com>
Following the logic from commit 2de6aa3a666e
("ixgbe: Add support for padding packet")
Add support for providing a buffer with headroom and tail room
to allow for shared info, NET_SKB_PAD, and NET_IP_ALIGN. With this
combined with the DMA changes we can start using build_skb to build frames
around an incoming Rx buffer instead of having to memcpy the headers.
Signed-off-by: Emil Tantilov <emil.s.tantilov@...el.com>
Tested-by: Krishneil Singh <krishneil.k.singh@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbevf/ixgbevf.h | 11 ++++++++
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 32 ++++++++++++++++++++---
2 files changed, 39 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
index d4ee6b1719a9..a5e9127a1156 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
@@ -90,6 +90,7 @@ struct ixgbevf_rx_queue_stats {
enum ixgbevf_ring_state_t {
__IXGBEVF_RX_3K_BUFFER,
+ __IXGBEVF_RX_BUILD_SKB_ENABLED,
__IXGBEVF_TX_DETECT_HANG,
__IXGBEVF_HANG_CHECK_ARMED,
};
@@ -179,11 +180,21 @@ struct ixgbevf_ring {
#define clear_ring_uses_large_buffer(ring) \
clear_bit(__IXGBEVF_RX_3K_BUFFER, &(ring)->state)
+#define ring_uses_build_skb(ring) \
+ test_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
+#define set_ring_build_skb_enabled(ring) \
+ set_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
+#define clear_ring_build_skb_enabled(ring) \
+ clear_bit(__IXGBEVF_RX_BUILD_SKB_ENABLED, &(ring)->state)
+
static inline unsigned int ixgbevf_rx_bufsz(struct ixgbevf_ring *ring)
{
#if (PAGE_SIZE < 8192)
if (ring_uses_large_buffer(ring))
return IXGBEVF_RXBUFFER_3072;
+
+ if (ring_uses_build_skb(ring))
+ return IXGBEVF_MAX_FRAME_BUILD_SKB;
#endif
return IXGBEVF_RXBUFFER_2048;
}
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index cb9d00a38658..189d6af43b37 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -554,6 +554,11 @@ static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
return true;
}
+static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
+{
+ return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
+}
+
static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
struct ixgbevf_rx_buffer *bi)
{
@@ -588,7 +593,7 @@ static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
bi->dma = dma;
bi->page = page;
- bi->page_offset = 0;
+ bi->page_offset = ixgbevf_rx_offset(rx_ring);
bi->pagecnt_bias = 1;
rx_ring->rx_stats.alloc_rx_page++;
@@ -803,7 +808,9 @@ static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
#if (PAGE_SIZE < 8192)
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
#else
- unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
+ unsigned int truesize = ring_uses_build_skb(rx_ring) ?
+ SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
+ SKB_DATA_ALIGN(size);
#endif
unsigned int pull_len;
@@ -1776,8 +1783,19 @@ static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
ixgbevf_configure_srrctl(adapter, ring, reg_idx);
- /* allow any size packet since we can handle overflow */
- rxdctl &= ~IXGBE_RXDCTL_RLPML_EN;
+ /* RXDCTL.RLPML does not work on 82599 */
+ if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
+ rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
+ IXGBE_RXDCTL_RLPML_EN);
+
+#if (PAGE_SIZE < 8192)
+ /* Limit the maximum frame size so we don't overrun the skb */
+ if (ring_uses_build_skb(ring) &&
+ !ring_uses_large_buffer(ring))
+ rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
+ IXGBE_RXDCTL_RLPML_EN;
+#endif
+ }
rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
@@ -1793,11 +1811,14 @@ static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
/* set build_skb and buffer size flags */
+ clear_ring_build_skb_enabled(rx_ring);
clear_ring_uses_large_buffer(rx_ring);
if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
return;
+ set_ring_build_skb_enabled(rx_ring);
+
#if (PAGE_SIZE < 8192)
if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
return;
@@ -3890,6 +3911,9 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
/* must set new MTU before calling down or up */
netdev->mtu = new_mtu;
+ if (netif_running(netdev))
+ ixgbevf_reinit_locked(adapter);
+
return 0;
}
--
2.14.3
Powered by blists - more mailing lists