- 05 Apr, 2016 39 commits
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Shannon Nelson authored
In some error scenarios, we may find ourselves trying to remove a non-existent timer or worktask. This causes the kernel some bit of consternation, so don't do it. Signed-off-by:
Shannon Nelson <shannon.nelson@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Shannon Nelson authored
When dropping into debug mode in a failed probe, make sure that the AdminQ is left alive for possible hand debug of driver and firmware states. Move the mutex_init calls earlier in probe so that if init fails, the admin queue interface is still available for debugging purposes. Signed-off-by:
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Shannon Nelson authored
When cleaning up the interrupt handling, clean up the IRQs only if we actually got them set up. There are a couple of error recovery paths that were violating this and causing the kernel a bit of indigestion. Signed-off-by:
Williams, Mitch A <mitch.a.williams@intel.com> Tested-by:
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Jesse Brandeburg authored
The i40e_common.c typically uses i40e_status as a return code, but got missed this one case. Signed-off-by:
Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by:
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Kevin Scott authored
When updating a VSI, save off the number of allocated and unallocated VSIs as we do when adding a VSI. Signed-off-by:
Kevin Scott <kevin.c.scott@intel.com> Tested-by:
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Catherine Sullivan authored
This patch removes the duplicate definition of I40E_MAX_USER_PRIORITY in i40e.h that is not needed. Signed-off-by:
Catherine Sullivan <catherine.sullivan@intel.com> Tested-by:
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Jesse Brandeburg authored
Simple cast to fix a sparse warning. Fixes: commit 5453205c ("i40e/i40evf: Enable support for SKB_GSO_UDP_TUNNEL_CSUM") Signed-off-by:
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Alexander Duyck authored
This patch enables bulk Tx clean for skbs. In order to enable it we need to pass the napi_budget value as that is used to determine if we are truly running in NAPI mode or if we are simply calling the routine from netpoll with a budget of 0. In order to avoid adding too many more variables I thought it best to pass the VSI directly in a fashion similar to what we do on igb and ixgbe with the q_vector. Signed-off-by:
Alexander Duyck <aduyck@mirantis.com> Tested-by:
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Alexander Duyck authored
In the polling routines for i40e and i40evf we were using bitwise operators to avoid the side effects of the logical operators, specifically the fact that if the first case is true with "||" we skip the second case, or if it is false with "&&" we skip the second case. This fixes an earlier patch that converted the bitwise operators over to the logical operators and instead replaces the entire thing with just an if statement since it should be more readable what we are trying to do this way. Fixes: 1a36d7fa ("i40e/i40evf: use logical operators, not bitwise") Signed-off-by:
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Alan Cox authored
The only error case is when the malloc fails, in which case the clean up loop does nothing at all, so remove it Signed-off-by:
Alan Cox <alan@linux.intel.com> Tested-by:
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Alexander Duyck authored
From what I can tell the practical limitation on the size of the Tx data buffer is the fact that the Tx descriptor is limited to 14 bits. As such we cannot use 16K as is typically used on the other Intel drivers. However artificially limiting ourselves to 8K can be expensive as this means that we will consume up to 10 descriptors (1 context, 1 for header, and 9 for payload, non-8K aligned) in a single send. I propose that we can reduce this by increasing the maximum data for a 4K aligned block to 12K. We can reduce the descriptors used for a 32K aligned block by 1 by increasing the size like this. In addition we still have the 4K - 1 of space that is still unused. We can use this as a bit of extra padding when dealing with data that is not aligned to 4K. By aligning the descriptors after the first to 4K we can improve the efficiency of PCIe accesses as we can avoid using byte enables and can fetch full TLP transactions after the first fetch of the buffer. This helps to improve PCIe efficiency. Below is the results of testing before and after with this patch: Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB Before: 87380 16384 16384 10.00 33682.24 20.27 -1.00 0.592 -1.00 After: 87380 16384 16384 10.00 34204.08 20.54 -1.00 0.590 -1.00 So the net result of this patch is that we have a small gain in throughput due to a reduction in overhead for putting together the frame. Signed-off-by:
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Stefan Assmann authored
Calling dev_close() causes IFF_UP to be cleared which will remove the interfaces routes and some addresses. That's probably not what the user intended when running the offline selftest. Besides this does not happen if the interface is brought down before the test, so the current behaviour is inconsistent. Instead call the net_device_ops ndo_stop function directly and avoid touching IFF_UP at all. Signed-off-by:
Stefan Assmann <sassmann@kpanic.de> Tested-by:
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David S. Miller authored
Eric Dumazet says: ==================== net: various udp/tcp changes First round of patches for linux-4.7 Add a generic facility for sockets to be freed after an RCU grace period, if they need to. Then UDP stack is changed to no longer use SLAB_DESTROY_BY_RCU, in order to speedup rx processing for traffic encapsulated in UDP. It gives a 17 % speedup for normal UDP reception in stress conditions. Then TCP listeners are changed to use SOCK_RCU_FREE as well to avoid touching sk_refcnt in synflood case : I got up to 30 % performance increase for a mono listener. Then three patches add SK_MEMINFO_DROPS to sock_diag and add per socket rx drops accounting to TCP. Last patch adds rate limiting on ACK sent on behalf of SYN_RECV to better resist to SYNFLOOD targeting one or few flows. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Attackers like to use SYNFLOOD targeting one 5-tuple, as they hit a single RX queue (and cpu) on the victim. If they use random sequence numbers in their SYN, we detect they do not match the expected window and send back an ACK. This patch adds a rate limitation, so that the effect of such attacks is limited to ingress only. We roughly double our ability to absorb such attacks. Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Maciej Żenczykowski <maze@google.com> Acked-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
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Eric Dumazet authored
TCP uses per cpu 'sockets' to send some packets : - RST packets ( tcp_v4_send_reset()) ) - ACK packets for SYN_RECV and TIMEWAIT sockets By setting SOCK_USE_WRITE_QUEUE flag, we tell sock_wfree() to not call sk_write_space() since these internal sockets do not care. This gives a small performance improvement, merely by allowing cpu to properly predict the sock_wfree() conditional branch, and avoiding one atomic operation. Signed-off-by:
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Eric Dumazet authored
Goal: packets dropped by a listener are accounted for. This adds tcp_listendrop() helper, and clears sk_drops in sk_clone_lock() so that children do not inherit their parent drop count. Note that we no longer increment LINUX_MIB_LISTENDROPS counter when sending a SYNCOOKIE, since the SYN packet generated a SYNACK. We already have a separate LINUX_MIB_SYNCOOKIESSENT Signed-off-by:
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Eric Dumazet authored
Now ss can report sk_drops, we can instruct TCP to increment this per socket counter when it drops an incoming frame, to refine monitoring and debugging. Following patch takes care of listeners drops. Signed-off-by:
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Eric Dumazet authored
Reporting sk_drops to user space was available for UDP sockets using /proc interface. Add this to sock_diag, so that we can have the same information available to ss users, and we'll be able to add sk_drops indications for TCP sockets as well. Signed-off-by:
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Eric Dumazet authored
When a SYNFLOOD targets a non SO_REUSEPORT listener, multiple cpus contend on sk->sk_refcnt and sk->sk_wmem_alloc changes. By letting listeners use SOCK_RCU_FREE infrastructure, we can relax TCP_LISTEN lookup rules and avoid touching sk_refcnt Note that we still use SLAB_DESTROY_BY_RCU rules for other sockets, only listeners are impacted by this change. Peak performance under SYNFLOOD is increased by ~33% : On my test machine, I could process 3.2 Mpps instead of 2.4 Mpps Most consuming functions are now skb_set_owner_w() and sock_wfree() contending on sk->sk_wmem_alloc when cooking SYNACK and freeing them. Signed-off-by:
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Eric Dumazet authored
We'll soon no longer take a refcount on listeners, so reqsk_alloc() can not assume a listener refcount is not zero. We need to use atomic_inc_not_zero() Signed-off-by:
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Eric Dumazet authored
RX packet processing holds rcu_read_lock(), so we can remove pairs of rcu_read_lock()/rcu_read_unlock() in lookup functions if inet_diag also holds rcu before calling them. This is needed anyway as __inet_lookup_listener() and inet6_lookup_listener() will soon no longer increment refcount on the found listener. Signed-off-by:
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Eric Dumazet authored
Since linux 2.6.29, lookups only use rcu locking. Signed-off-by:
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Eric Dumazet authored
Tom Herbert would like not touching UDP socket refcnt for encapsulated traffic. For this to happen, we need to use normal RCU rules, with a grace period before freeing a socket. UDP sockets are not short lived in the high usage case, so the added cost of call_rcu() should not be a concern. This actually removes a lot of complexity in UDP stack. Multicast receives no longer need to hold a bucket spinlock. Note that ip early demux still needs to take a reference on the socket. Same remark for functions used by xt_socket and xt_PROXY netfilter modules, but this might be changed later. Performance for a single UDP socket receiving flood traffic from many RX queues/cpus. Simple udp_rx using simple recvfrom() loop : 438 kpps instead of 374 kpps : 17 % increase of the peak rate. v2: Addressed Willem de Bruijn feedback in multicast handling - keep early demux break in __udp4_lib_demux_lookup() Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
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Eric Dumazet authored
We want a generic way to insert an RCU grace period before socket freeing for cases where RCU_SLAB_DESTROY_BY_RCU is adding too much overhead. SLAB_DESTROY_BY_RCU strict rules force us to take a reference on the socket sk_refcnt, and it is a performance problem for UDP encapsulation, or TCP synflood behavior, as many CPUs might attempt the atomic operations on a shared sk_refcnt UDP sockets and TCP listeners can set SOCK_RCU_FREE so that their lookup can use traditional RCU rules, without refcount changes. They can set the flag only once hashed and visible by other cpus. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Jeff Kirsher says: ==================== 10GbE Intel Wired LAN Driver Updates 2016-04-04 This series contains updates to ixgbe and ixgbevf. Pavel Tikhomirov fixes a typo where we were incrementing transmit stats instead of receive stats on the receive side. Emil updates the ixgbevf driver to use bit operations for setting and checking the adapter state. Chas Williams adds the new NDO trust feature check so that the VF guest has the ability to set the unicast address of the interface, if it is a trusted VF. Alex cleans up the driver to that the only time we add a PF entry to the VLVF is either for VLAN 0 or if the PF has requested a VLAN that a VF is already using. Also adds support for generic transmit checksums, giving the added advantage is that we can support inner checksum offloads for tunnels and MPLS while still being able to transparently insert VLAN tags. Lastly, changed ixgbe so that we can use the ethtool rx-vlan-filter flag to toggle receive VLAN filtering on and off. Mark cleans up the ixgbe driver by making all op structures that do not change constants. Also fixed flow control for Xeon D KR backplanes, since we cannot use auto-negotiation to determine the mode, we have to use whatever the user configured. Sowmini Varadhan updates ixgbe to use eth_platform_get_mac_address() instead of the arch specific solution that was added by a previous commit. Don fixed an issue where it was possible that a system reset could occur when we were holding the SWFW semaphore lock, which the next time the driver loaded would see it incorrectly as locked. v2: updated patch 8 of the series to include a minor flags issue where we had lost NETIF_F_HW_TC and we were setting NETIF_F_SCTP_CRC in two different areas, when we only needed/wanted it in one spot. ==================== Signed-off-by: -
David S. Miller authored
Vivien Didelot says: ==================== net: dsa: mv88e6131: HW bridging support for 6185 All packets passing through a switch of the 6185 family are currently all directed to the CPU port. This means that port bridging is software driven. To enable hardware bridging for this switch family, we need to implement the port mapping operations, the FDB operations, and optionally the VLAN operations (for 802.1Q and VLAN filtering aware systems). However this family only has 256 FDBs indexed by 8-bit identifiers, opposed to 4096 FDBs with 12-bit identifiers for other families such as 6352. It also doesn't have dedicated FID registers for ATU and VTU operations. This patchset fixes these differences, and enable hardware bridging for 6185. Changes v1 -> v2: - Describe the different numbers of databases and prefer a feature-based logic over the current ID/family-based logic. ==================== Tested-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Vivien Didelot authored
By adding support for bridge operations, FDB operations, and optionally VLAN operations (for 802.1Q and VLAN filtering aware systems), the switch bridges ports correctly, the CPU is able to populate the hardware address databases, and thus hardware bridging becomes functional within the 88E6185 family of switches. Signed-off-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by:
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Vivien Didelot authored
The 88E6185 switch also has a MapDA bit in its Port Control 2 register. When this bit is cleared, all frames are sent out to the CPU port. Set this bit to rely on address databases (ATU) hits and direct frames out of the correct ports, and thus allow hardware bridging. Signed-off-by:
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Vivien Didelot authored
The 6185 family of devices has only 256 address databases. Their 8-bit FID for ATU and VTU operations are split into ATU Control and ATU/VTU Operation registers. Signed-off-by:
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Vivien Didelot authored
Marvell switch chips have different number of address databases. The code currently only supports models with 4096 databases. Such switch has dedicated FID registers for ATU and VTU operations. Models with fewer databases have their FID split in several registers. List them all but only support models with 4096 databases at the moment. Signed-off-by:
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Vivien Didelot authored
Only switch families with 4096 address databases have dedicated FID registers for ATU and VTU operations. Factorize the access to the GLOBAL_ATU_FID register and introduce a mv88e6xxx_has_fid_reg() helper function to protect the access to GLOBAL_ATU_FID and GLOBAL_VTU_FID. Signed-off-by:
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Vivien Didelot authored
Introduce a mv88e6xxx_has_stu() helper to protect the access to the GLOBAL_VTU_SID register, instead of checking switch families. Signed-off-by:
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Alexander Duyck authored
This change makes it so that we can use the ethtool rx-vlan-filter flag to toggle Rx VLAN filtering on and off. This is basically just an extension of the existing VLAN promisc work in that it just adds support for the additional ethtool flag. Signed-off-by:
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Amritha Nambiar authored
Added support to match on UDP fields in the transport layer. Extended core logic to support multiple headers. Verified with the following filters : handle 1: u32 divisor 1 u32 ht 800: order 1 link 1: \ offset at 0 mask 0f00 shift 6 plus 0 eat match ip protocol 6 ff u32 ht 1: order 2 \ match tcp src 1024 ffff match tcp dst 23 ffff action drop handle 2: u32 divisor 1 u32 ht 800: order 3 link 2: \ offset at 0 mask 0f00 shift 6 plus 0 eat match ip protocol 17 ff u32 ht 2: order 4 \ match udp src 1025 ffff match udp dst 24 ffff action drop Signed-off-by:
Amritha Nambiar <amritha.nambiar@intel.com> Acked-by:
John Fastabend <john.r.fastabend@intel.com> Acked-by:
Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by:
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Don Skidmore authored
It is possible on some HW that a system reset could occur when we are holding the SWFW semaphore lock. So next time the driver was loaded we would see it incorrectly as locked. This patch will recover from that state by: Attempting to acquire the semaphore and then regardless of whether or not it was acquire we immediately release it. This will force us into a known good state. Signed-off-by:
Don Skidmore <donald.c.skidmore@intel.com> Tested-by:
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Rostislav Pehlivanov authored
This commit adds a callback which allows to adjust the maximum transmit bitrate the card can output. This makes it possible to get a smooth traffic instead of the default burst-y behaviour when trying to output e.g. a video stream. Much of the logic needed to get a correct bcnrc_val was taken from the ixgbe_set_vf_rate_limit() function. Signed-off-by:
Rostislav Pehlivanov <atomnuker@gmail.com> Tested-by:
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Mark Rustad authored
Xeon D KR backplane is different from other backplanes, in that we can't use auto-negotiation to determine the mode. Instead, use whatever the user configured. Signed-off-by:
Mark Rustad <mark.d.rustad@intel.com> Tested-by:
Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by:
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Alexander Duyck authored
This patch adds support for generic Tx checksums to the ixgbevf driver. It turns out this is actually pretty easy after going over the datasheet as we were doing a number of steps we didn't need to. In order to perform a Tx checksum for an L4 header we need to fill in the following fields in the Tx descriptor: MACLEN (maximum of 127), retrieved from: skb_network_offset() IPLEN (maximum of 511), retrieved from: skb_checksum_start_offset() - skb_network_offset() TUCMD.L4T indicates offset and if checksum or crc32c, based on: skb->csum_offset The added advantage to doing this is that we can support inner checksum offloads for tunnels and MPLS while still being able to transparently insert VLAN tags. I also took the opportunity to clean-up many of the feature flag configuration bits to make them a bit more consistent between drivers. In the case of the VF drivers this meant adding support for SCTP CRCs, and inner checksum offloads for MPLS and various tunnel types. Signed-off-by:
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Alexander Duyck authored
This patch adds support for generic Tx checksums to the ixgbe driver. It turns out this is actually pretty easy after going over the datasheet as we were doing a number of steps we didn't need to. In order to perform a Tx checksum for an L4 header we need to fill in the following fields in the Tx descriptor: MACLEN (maximum of 127), retrieved from: skb_network_offset() IPLEN (maximum of 511), retrieved from: skb_checksum_start_offset() - skb_network_offset() TUCMD.L4T indicates offset and if checksum or crc32c, based on: skb->csum_offset The added advantage to doing this is that we can support inner checksum offloads for tunnels and MPLS while still being able to transparently insert VLAN tags. I also took the opportunity to clean-up many of the feature flag configuration bits to make them a bit more consistent between drivers. Signed-off-by:
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- 04 Apr, 2016 1 commit
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Sowmini Varadhan authored
This commit converts commit c762dff2 ("ixgbe: Look up MAC address in Open Firmware or IDPROM") to use eth_platform_get_mac_address() added by commit c7f5d105 ("net: Add eth_platform_get_mac_address() helper.") Signed-off-by:
Sowmini Varadhan <sowmini.varadhan@oracle.com> Tested-by:
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