- 20 Jul, 2012 16 commits
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Eric Dumazet authored
Fix a missing roundup_pow_of_two(), since tcpmhash_entries is not guaranteed to be a power of two. Uses hash_32() instead of custom hash. tcpmhash_entries should be an unsigned int. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Vijay Subramanian authored
Applied to a set of static inline functions in tcp_input.c Signed-off-by:
Vijay Subramanian <subramanian.vijay@gmail.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jon Mason authored
Use PCI_VENDOR_ID_INTEL from pci_ids.h instead of creating its own vendor ID #define. Signed-off-by:
Jon Mason <jdmason@kudzu.us> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Bruce Allan <bruce.w.allan@intel.com> Cc: Carolyn Wyborny <carolyn.wyborny@intel.com> Cc: Don Skidmore <donald.c.skidmore@intel.com> Cc: Greg Rose <gregory.v.rose@intel.com> Cc: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Cc: Alex Duyck <alexander.h.duyck@intel.com> Cc: John Ronciak <john.ronciak@intel.com> Acked-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jon Mason authored
Use PCI_VENDOR_ID_INTEL from pci_ids.h instead of creating its own vendor ID #define. Signed-off-by:
Jon Mason <jdmason@kudzu.us> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Bruce Allan <bruce.w.allan@intel.com> Cc: Carolyn Wyborny <carolyn.wyborny@intel.com> Cc: Don Skidmore <donald.c.skidmore@intel.com> Cc: Greg Rose <gregory.v.rose@intel.com> Cc: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Cc: Alex Duyck <alexander.h.duyck@intel.com> Cc: John Ronciak <john.ronciak@intel.com> Acked-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jon Mason authored
Remove myself from myri10ge MAINTAINERS list Signed-off-by:
Jon Mason <jdmason@kudzu.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://gitorious.org/linux-can/linux-can-nextDavid S. Miller authored
Marc Kleine-Budde says: ==================== the fifth pull request for upcoming v3.6 net-next cleans up and improves the janz-ican3 driver (6 patches by Ira W. Snyder, one by me). A patch by Steffen Trumtrar adds imx53 support to the flexcan driver. And another patch by me, which marks the bit timing constant in the CAN drivers as "const". ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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John W. Linville authored
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
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Ira W. Snyder authored
The Janz VMOD-ICAN3 hardware has support for one shot packet transmission. This means that a packet will be attempted to be sent once, with no automatic retries. The SocketCAN core has a controller-wide setting for this mode: CAN_CTRLMODE_ONE_SHOT. The Janz VMOD-ICAN3 hardware supports this flag on a per-packet level, but the SocketCAN core does not. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Ira W. Snyder authored
If the bus error quota is set to infinite and the host CPU cannot keep up, the Janz VMOD-ICAN3 firmware will stop responding to control messages until the controller is reset. The firmware will automatically stop sending bus error messages when the quota is reached, and will only resume sending bus error messages when the quota is re-set to a positive value. This limitation is worked around by setting the bus error quota to one message, and then re-setting the quota to one message every time a bus error message is received. By doing this, the firmware never stops responding to control messages. The CAN bus can be reset without a hard-reset of the controller card. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Ira W. Snyder authored
The Janz VMOD-ICAN3 firmware does not support any sort of TX-done notification or interrupt. The driver previously used the hardware loopback to attempt to work around this deficiency, but this caused all sockets to receive all messages, even if CAN_RAW_RECV_OWN_MSGS is off. Using the new function ican3_cmp_echo_skb(), we can drop the loopback messages and return the original skbs. This fixes the issues with CAN_RAW_RECV_OWN_MSGS. A private skb queue is used to store the echo skbs. This avoids the need for any index management. Due to a lack of TX-error interrupts, bus errors are permanently enabled, and are used as a TX-error notification. This is used to drop an echo skb when transmission fails. Bus error packets are not generated if the user has not enabled bus error reporting. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Ira W. Snyder authored
The error and byte counter statistics were being incremented incorrectly. For example, a TX error would be counted both in tx_errors and rx_errors. This corrects the problem so that tx_errors and rx_errors are only incremented for errors caused by packets sent to the bus. Error packets generated by the driver are not counted. The byte counters are only increased for packets which are actually transmitted or received from the bus. Error packets generated by the driver are not counted. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
This patch cleans up the ICAN3 to Linux CAN frame and vice versa conversion functions: - RX: Use get_can_dlc() to limit the dlc value. - RX+TX: Don't copy the whole frame, only copy the amount of bytes specified in cf->can_dlc. Acked-by:
Ira W. Snyder <iws@ovro.caltech.edu> Tested-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Ira W. Snyder authored
The commit which added the janz-ican3 driver and commit 3ccd4c61 "can: Unify droping of invalid tx skbs and netdev stats" were committed into mainline Linux during the same merge window. Therefore, the addition of this code to the janz-ican3 driver was forgotten. This patch adds the expected code. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Ira W. Snyder authored
The code which used this variable was removed during review, before the driver was added to mainline Linux. It is now dead code, and can be removed. Signed-off-by:
Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Steffen Trumtrar authored
This patch adds support for a second clock to the flexcan driver. On modern freescale ARM cores like the imx53 and imx6q two clocks ("ipg" and "per") must be enabled in order to access the CAN core. In the original driver, the clock was requested without specifying the connection id, further all mainline ARM archs with flexcan support (imx28, imx25, imx35) register their flexcan clock without a connection id, too. This patch first renames the existing clk variable to clk_ipg and converts it to devm for easier error handling. The connection id "ipg" is added to the devm_clk_get() call. Then a second clock "per" is requested. As all archs don't specify a connection id, both clk_get return the same clock. This ensures compatibility to existing flexcan support and adds support for imx53 at the same time. After this patch hits mainline, the archs may give their existing flexcan clock the "ipg" connection id and implement a dummy "per" clock. This patch has been tested on imx28 (unmodified clk tree) and on imx53 with a seperate "ipg" and "per" clock. Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
Steffen Trumtrar <s.trumtrar@pengutronix.de> Acked-by:
Hui Wang <jason77.wang@gmail.com> Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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Marc Kleine-Budde authored
This patch marks the bittiming_const pointer as in the struct can_pric as "const". This allows us to mark the struct can_bittiming_const in the CAN drivers as "const", too. Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de>
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- 19 Jul, 2012 24 commits
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Julian Anastasov authored
Fix again the diff value in rt_bind_exception after collision of two latest patches, my original commit actually fixed the same problem. Signed-off-by:
Julian Anastasov <ja@ssi.bg> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Conflicts: drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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Yuchung Cheng authored
In trusted networks, e.g., intranet, data-center, the client does not need to use Fast Open cookie to mitigate DoS attacks. In cookie-less mode, sendmsg() with MSG_FASTOPEN flag will send SYN-data regardless of cookie availability. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
On paths with firewalls dropping SYN with data or experimental TCP options, Fast Open connections will have experience SYN timeout and bad performance. The solution is to track such incidents in the cookie cache and disables Fast Open temporarily. Since only the original SYN includes data and/or Fast Open option, the SYN-ACK has some tell-tale sign (tcp_rcv_fastopen_synack()) to detect such drops. If a path has recurring Fast Open SYN drops, Fast Open is disabled for 2^(recurring_losses) minutes starting from four minutes up to roughly one and half day. sendmsg with MSG_FASTOPEN flag will succeed but it behaves as connect() then write(). Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
sendmsg() (or sendto()) with MSG_FASTOPEN is a combo of connect(2) and write(2). The application should replace connect() with it to send data in the opening SYN packet. For blocking socket, sendmsg() blocks until all the data are buffered locally and the handshake is completed like connect() call. It returns similar errno like connect() if the TCP handshake fails. For non-blocking socket, it returns the number of bytes queued (and transmitted in the SYN-data packet) if cookie is available. If cookie is not available, it transmits a data-less SYN packet with Fast Open cookie request option and returns -EINPROGRESS like connect(). Using MSG_FASTOPEN on connecting or connected socket will result in simlar errno like repeating connect() calls. Therefore the application should only use this flag on new sockets. The buffer size of sendmsg() is independent of the MSS of the connection. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
On receiving the SYN-ACK after SYN-data, the client needs to a) update the cached MSS and cookie (if included in SYN-ACK) b) retransmit the data not yet acknowledged by the SYN-ACK in the final ACK of the handshake. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
This patch implements sending SYN-data in tcp_connect(). The data is from tcp_sendmsg() with flag MSG_FASTOPEN (implemented in a later patch). The length of the cookie in tcp_fastopen_req, init'd to 0, controls the type of the SYN. If the cookie is not cached (len==0), the host sends data-less SYN with Fast Open cookie request option to solicit a cookie from the remote. If cookie is not available (len > 0), the host sends a SYN-data with Fast Open cookie option. If cookie length is negative, the SYN will not include any Fast Open option (for fall back operations). To deal with middleboxes that may drop SYN with data or experimental TCP option, the SYN-data is only sent once. SYN retransmits do not include data or Fast Open options. The connection will fall back to regular TCP handshake. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
With help from Eric Dumazet, add Fast Open metrics in tcp metrics cache. The basic ones are MSS and the cookies. Later patch will cache more to handle unfriendly middleboxes. Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuchung Cheng authored
This patch impelements the common code for both the client and server. 1. TCP Fast Open option processing. Since Fast Open does not have an option number assigned by IANA yet, it shares the experiment option code 254 by implementing draft-ietf-tcpm-experimental-options with a 16 bits magic number 0xF989. This enables global experiments without clashing the scarce(2) experimental options available for TCP. When the draft status becomes standard (maybe), the client should switch to the new option number assigned while the server supports both numbers for transistion. 2. The new sysctl tcp_fastopen 3. A place holder init function Signed-off-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Thadeu Lima de Souza Cascardo authored
In its receive path, mlx4_en driver maps each page chunk that it pushes to the hardware and unmaps it when pushing it up the stack. This limits throughput to about 3Gbps on a Power7 8-core machine. One solution is to map the entire allocated page at once. However, this requires that we keep track of every page fragment we give to a descriptor. We also need to work with the discipline that all fragments will be released (in the sense that it will not be reused by the driver anymore) in the order they are allocated to the driver. This requires that we don't reuse any fragments, every single one of them must be reallocated. We do that by releasing all the fragments that are processed and only after finished processing the descriptors, we start the refill. We also must somehow guarantee that we either refill all fragments in a descriptor or none at all, without resorting to giving up a page fragment that we would have already given. Otherwise, we would break the discipline of only releasing the fragments in the order they were allocated. This has passed page allocation fault injections (restricted to the driver by using required-start and required-end) and device hotplug while 16 TCP streams were able to deliver more than 9Gbps. Signed-off-by:
Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Michal Schmidt authored
Dynamically allocated sysfs attributes must be initialized using sysfs_attr_init(), otherwise lockdep complains: BUG: key <address> not in .data! Signed-off-by:
Michal Schmidt <mschmidt@redhat.com> Acked-by:
Ben Hutchings <bhutchings@solarflare.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
Update the references to bridge utilities and web pages to current locations Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Bjørn Mork authored
commit 9ac32e1b firmware: convert e100 driver to request_firmware() did a straight conversion of the in-driver ucode to external files. This introduced the possibility of the driver failing to enable an interface due to missing ucode. There was no evaluation of the importance of the ucode at the time. Based on comments in earlier versions of this driver, and in the source code for the FreeBSD fxp driver, we can assume that the ucode implements the "CPU Cycle Saver" feature on supported adapters. Although generally wanted, this is an optional feature. The ucode source is not available, preventing it from being included in free distributions. This creates unnecessary problems for the end users. Doing a network install based on a free distribution installer requires the user to download and insert the ucode into the installer. Making the ucode optional when possible improves the user experience and driver usability. The ucode for some adapters include a bugfix, making it essential. We continue to fail for these adapters unless the ucode is available. Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Christian Riesch authored
Since commit 16626b0c the asix driver depends on the phylib. Select phylib when the asix driver is selected. Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Cc: kernel-janitors@vger.kernel.org Signed-off-by:
Christian Riesch <christian.riesch@omicron.at> Tested-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Christian Riesch authored
This patch adds the asix_set_eeprom() function to provide support for programming the configuration EEPROM via ethtool. Signed-off-by:
Christian Riesch <christian.riesch@omicron.at> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Christian Riesch authored
The current code for reading the EEPROM via ethtool in the asix driver has a few issues. It cannot handle odd length values (accesses must be aligned at 16 bit boundaries) and interprets the offset provided by ethtool as 16 bit word offset instead as byte offset. The new code for asix_get_eeprom() introduced by this patch is modeled after the code in drivers/net/ethernet/atheros/atl1e/atl1e_ethtool.c and provides read access to the entire EEPROM with arbitrary offsets and lengths. Signed-off-by:
Christian Riesch <christian.riesch@omicron.at> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Dinh Nguyen authored
Because there are multiple variants to the stmmac/dwmac driver, the dts bindings should be updated to include version of the IP used. Signed-off-by:
Dinh Nguyen <dinguyen@altera.com> Acked-by:
Stefan Roese <sr@denx.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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brenohl@br.ibm.com authored
cxgb3 interface has a bad performance when VLAN is set. On my current setup, a PowerLinux 7R2, I am able to get around 7 Gbps on a TCP_STREAM (8 instances, 4k message). With this patch, I am able to reach 9.5 Gbps. Signed-off-by:
Breno Leitao <brenohl@br.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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stephen hemminger authored
The Ethernet II wrapper is only used by IPX protocol, may have once been used by Appletalk but not currently. Therefore it makes sense to move it to the IPX dust bin and drop the exports. Build tested only. Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
include/net/dst_ops.h:28:20: warning: ‘struct sock’ declared inside parameter list Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
tcp_v4_send_reset() and tcp_v4_send_ack() use a single socket per network namespace. This leads to bad behavior on multiqueue NICS, because many cpus contend for the socket lock and once socket lock is acquired, extra false sharing on various socket fields slow down the operations. To better resist to attacks, we use a percpu socket. Each cpu can run without contention, using appropriate memory (local node) Additional features : 1) We also mirror the queue_mapping of the incoming skb, so that answers use the same queue if possible. 2) Setting SOCK_USE_WRITE_QUEUE socket flag speedup sock_wfree() 3) We now limit the number of in-flight RST/ACK [1] packets per cpu, instead of per namespace, and we honor the sysctl_wmem_default limit dynamically. (Prior to this patch, sysctl_wmem_default value was copied at boot time, so any further change would not affect tcp_sock limit) [1] These packets are only generated when no socket was matched for the incoming packet. Reported-by:
Bill Sommerfeld <wsommerfeld@google.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Tom Herbert <therbert@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Julian Anastasov authored
Use global seqlock for the nh_exceptions. Call fnhe_oldest with the right hash chain. Correct the diff value for dst_set_expires. v2: after suggestions from Eric Dumazet: * get rid of spin lock fnhe_lock, rearrange update_or_create_fnhe * continue daddr search in rt_bind_exception v3: * remove the daddr check before seqlock in rt_bind_exception * restart lookup in rt_bind_exception on detected seqlock change, as suggested by David Miller Signed-off-by:
Julian Anastasov <ja@ssi.bg> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Duan Jiong authored
Signed-off-by:
Duan Jiong <djduanjiong@gmail.com>