- 13 Dec, 2017 20 commits
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Subash Abhinov Kasiviswanathan authored
Add support to send and receive packets over ethernet. An example of usage is testing the data path on UML. This can be achieved by setting up two UML instances in multicast mode and associating rmnet over the UML ethernet device. Signed-off-by:
Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Subash Abhinov Kasiviswanathan authored
Upon de-multiplexing data from one real dev, the packets can be sent to an unique rmnet device for a given mux id. Signed-off-by:
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Subash Abhinov Kasiviswanathan authored
Multiplexing is always enabled when transmiting from a rmnet device, so remove the redundant egress macros. De-multiplexing is always enabled when receiving packets from a rmnet device, so remove those ingress macros. Signed-off-by:
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Subash Abhinov Kasiviswanathan authored
Only the success and consumed entries were actually in use. Use standard error codes instead. Signed-off-by:
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Neal Cardwell authored
This patch enables tail loss probe in cwnd reduction (CWR) state to detect potential losses. Prior to this patch, since the sender uses PRR to determine the cwnd in CWR state, the combination of CWR+PRR plus tcp_tso_should_defer() could cause unnecessary stalls upon losses: PRR makes cwnd so gentle that tcp_tso_should_defer() defers sending wait for more ACKs. The ACKs may not come due to packet losses. Disallowing TLP when there is unused cwnd had the primary effect of disallowing TLP when there is TSO deferral, Nagle deferral, or we hit the rwin limit. Because basically every application write() or incoming ACK will cause us to run tcp_write_xmit() to see if we can send more, and then if we sent something we call tcp_schedule_loss_probe() to see if we should schedule a TLP. At that point, there are a few common reasons why some cwnd budget could still be unused: (a) rwin limit (b) nagle check (c) TSO deferral (d) TSQ For (d), after the next packet tx completion the TSQ mechanism will allow us to send more packets, so we don't really need a TLP (in practice it shouldn't matter whether we schedule one or not). But for (a), (b), (c) the sender won't send any more packets until it gets another ACK. But if the whole flight was lost, or all the ACKs were lost, then we won't get any more ACKs, and ideally we should schedule and send a TLP to get more feedback. In particular for a long time we have wanted some kind of timer for TSO deferral, and at least this would give us some kind of timer Reported-by:
Steve Ibanez <sibanez@stanford.edu> Signed-off-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
Yuchung Cheng <ycheng@google.com> Reviewed-by:
Nandita Dukkipati <nanditad@google.com> Reviewed-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Cong Wang authored
Since we now hold RTNL lock in tc_action_net_exit(), it is good to batch them to speedup tc action dismantle. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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David S. Miller authored
Stephen Hemminger says: ==================== hv_netvsc: Fix default and limit of recv buffer The default for receive buffer descriptors is not correct, it should match the default receive buffer size and the upper limit of receive buffer size is too low. Also, for older versions of Window servers hosts, different lower limit check is necessary, otherwise the buffer request will be rejected by the host, resulting vNIC not come up. This patch set corrects these problems. ==================== Signed-off-by: -
Haiyang Zhang authored
The values were not computed correctly. There are no significant visible impact, though. The intended size of RX buffer is 16 MB, and the default slot size is 1728. So, NETVSC_DEFAULT_RX should be 16*1024*1024 / 1728 = 9709. The intended size of TX buffer is 1 MB, and the slot size is 6144. So, NETVSC_DEFAULT_TX should be 1024*1024 / 6144 = 170. The patch puts the formula directly into the macro, and moves them to hyperv_net.h, together with related macros. Fixes: 5023a6db ("netvsc: increase default receive buffer size") Signed-off-by:
Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by:
Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by:
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Haiyang Zhang authored
The max should be 31 MB on host with NVSP version > 2. On legacy hosts (NVSP version <=2) only 15 MB receive buffer is allowed, otherwise the buffer request will be rejected by the host, resulting vNIC not coming up. The NVSP version is only available after negotiation. So, we add the limit checking for legacy hosts in netvsc_init_buf(). Fixes: 5023a6db ("netvsc: increase default receive buffer size") Signed-off-by:
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David S. Miller authored
Richard Leitner says: ==================== net: fec: fix refclk enable for SMSC LAN8710/20 This patch series fixes the use of the SMSC LAN8710/20 with a Freescale ETH when the refclk is generated by the FSL. This patchset depends on the "phylib: Add device reset GPIO support" patch submitted by Geert Uytterhoeven/Sergei Shtylyov, which was merged to net-next as commit bafbdd52 ("phylib: Add device reset GPIO support"). Changes v5: - fix reset delay calculation (max_t instead of min_t) Changes v4: - simplify dts parsing - simplify reset delay evaluation and execution - fec: ensure to only reset once during fec_enet_open() - remove dependency notes from commit message - add reviews and acks Changes v3: - use phylib to hard-reset the PHY - implement reset delays in phylib - add new phylib API & flag (PHY_RST_AFTER_CLK_EN) to determine if a PHY is affected Changes v2: - simplify and fix fec_reset_phy function to support multiple calls - include: linux: phy: harmonize phy_id{,_mask} type - reset the phy instead of not turning the clock on and off (which would have caused a power consumption regression) ==================== Signed-off-by:
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Richard Leitner authored
Some PHYs (for example the SMSC LAN8710/LAN8720) doesn't allow turning the refclk on and off again during operation (according to their datasheet). Nonetheless exactly this behaviour was introduced for power saving reasons by commit e8fcfcd5 ("net: fec: optimize the clock management to save power"). Therefore add support for the phy_reset_after_clk_enable function from phylib to mitigate this issue. Generally speaking this issue is only relevant if the ref clk for the PHY is generated by the SoC and therefore the PHY is configured to "REF_CLK In Mode". In our specific case (PCB) this problem does occur at about every 10th to 50th POR of an LAN8710 connected to an i.MX6SOLO SoC. The typical symptom of this problem is a "swinging" ethernet link. Similar issues were reported by users of the NXP forum: https://community.nxp.com/thread/389902 https://community.nxp.com/message/309354 With this patch applied the issue didn't occur for at least a few hundret PORs of our board. Fixes: e8fcfcd5 ("net: fec: optimize the clock management to save power") Signed-off-by:
Richard Leitner <richard.leitner@skidata.com> Signed-off-by:
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Richard Leitner authored
The Microchip/SMSC LAN8710/LAN8720 PHYs need (according to their datasheet [1]) a continuous REF_CLK when configured to "REF_CLK In Mode". Therefore set the PHY_RST_AFTER_CLK_EN flag for those PHYs to let the ETH driver reset them after the REF_CLK is enabled. [1] http://ww1.microchip.com/downloads/en/DeviceDoc/00002165B.pdfSigned-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Richard Leitner authored
Some PHYs need the refclk to be a continuous clock. Therefore they don't allow turning it off and on again during operation. Nonetheless such a clock switching is performed by some ETH drivers (namely FEC [1]) for power saving reasons. An example for an affected PHY is the SMSC/Microchip LAN8720 in "REF_CLK In Mode". In order to provide a uniform method to overcome this problem this patch adds a new phy_driver flag (PHY_RST_AFTER_CLK_EN) and corresponding function phy_reset_after_clk_enable() to the phylib. These should be used to trigger reset of the PHY after the refclk is switched on again. [1] commit e8fcfcd5 ("net: fec: optimize the clock management to save power") Signed-off-by:
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Richard Leitner authored
Some PHYs need a minimum time after the reset gpio was asserted and/or deasserted. To ensure we meet these timing requirements add two new optional devicetree parameters for the phy: reset-delay-us and reset-post-delay-us. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by:
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David S. Miller authored
Antoine Tenart says: ==================== net: mvpp2: various improvements These patches are sent as a series to avoid any possible conflict, even though there're not entirely related. I can send them separately if needed. The series applies on today's net-next tree. Since v1: - Removed the patch disabling TSO on allocation errors. ==================== Signed-off-by: -
Antoine Tenart authored
This patch adjust the coalescing parameters to the vendor recommendations for the PPv2 network controller. Suggested-by:
Yan Markman <ymarkman@marvell.com> Signed-off-by:
Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by:
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Antoine Tenart authored
This patch adds the tx-usec value to the informations reported to ethtool by the get_coalesce function. Suggested-by:
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Antoine Tenart authored
Cosmetic patch aligning values in the ethtool get_coalesce function. This patch do not modify in anyway the driver's behaviour. Signed-off-by:
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Yan Markman authored
The Rx/Tx ring sizes can be adjusted thanks to ethtool given specific network needs. This commit splits the default ring size from its max value to allow ethtool to vary the parameters in both ways. Signed-off-by:
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Antoine Tenart authored
This patch adds a check to only free the TSO header buffer when its allocation previously succeeded. Signed-off-by:
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- 12 Dec, 2017 4 commits
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David S. Miller authored
Eric Dumazet says: ==================== tcp: better receiver autotuning Now TCP senders no longer backoff when a drop is detected, it appears we are very often receive window limited. This series makes tcp_rcv_space_adjust() slightly more robust and responsive. ==================== Signed-off-by: -
Eric Dumazet authored
Back in linux-3.13 (commit b0983d3c ("tcp: fix dynamic right sizing")) I addressed the pressing issues we had with receiver autotuning. But DRS suffers from extra latencies caused by rcv_rtt_est.rtt_us drifts. One common problem happens during slow start, since the apparent RTT measured by the receiver can be inflated by ~50%, at the end of one packet train. Also, a single drop can delay read() calls by one RTT, meaning tcp_rcv_space_adjust() can be called one RTT too late. By replacing the tri-modal heuristic with a continuous function, we can offset the effects of not growing 'at the optimal time'. The curve of the function matches prior behavior if the space increased by 25% and 50% exactly. Cost of added multiply/divide is small, considering a TCP flow typically would run this part of the code few times in its life. I tested this patch with 100 ms RTT / 1% loss link, 100 runs of (netperf -l 5), and got an average throughput of 4600 Mbit instead of 1700 Mbit. Signed-off-by:
Soheil Hassas Yeganeh <soheil@google.com> Acked-by:
Wei Wang <weiwan@google.com> Acked-by:
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Eric Dumazet authored
When using large tcp_rmem[2] values (I did tests with 500 MB), I noticed overflows while computing rcvwin. Lets fix this before the following patch. Signed-off-by:
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Eric Dumazet authored
While rcvbuf is properly clamped by tcp_rmem[2], rcvwin is left to a potentially too big value. It has no serious effect, since : 1) tcp_grow_window() has very strict checks. 2) window_clamp can be mangled by user space to any value anyway. tcp_init_buffer_space() and companions use tcp_full_space(), we use tcp_win_from_space() to avoid reloading sk->sk_rcvbuf Signed-off-by:
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- 11 Dec, 2017 16 commits
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Zhu Yanjun authored
Since both tx_ring and first_tx are the head of tx ring, it not necessary to use two structure members to statically indicate the head of tx ring. So first_tx is removed. CC: Srinivas Eeda <srinivas.eeda@oracle.com> CC: Joe Jin <joe.jin@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by:
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David S. Miller authored
Jakub Kicinski says: ==================== nfp: dead code, clean ups and slight improvements This series contains small clean ups from John and Carl, and brings no functional changes. John's improvements target the flower code. First he makes sure we don't allocate space in FW request messages for MAC matches if the TC rule does not contain any. The remaining two patches remove some dead code and unused defines. Carl follows up with a slight optimization to his recent ethtool FW state dumps, byte swapping input parameters once instead of the data for every dumped item. ==================== Signed-off-by: -
Carl Heymann authored
Convert the requested dump level parameter to big-endian at the start of nfp_net_dump_calculate_size() and nfp_net_dump_populate_buffer(), then compare and assign it directly where needed in the traversal and prolog code. This decreases the total number of conversions used. Signed-off-by:
Carl Heymann <carl.heymann@netronome.com> Reviewed-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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John Hurley authored
Delete match field defines that are not supported at this time. Signed-off-by:
John Hurley <john.hurley@netronome.com> Reviewed-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Reviewed-by:
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John Hurley authored
Port matching is selected by default on every rule so remove check for it and delete 'else' side of the statement. Remove nfp_flower_meta_one as now it will not feature in the code. Rename nfp_flower_meta_two given that one has been removed. 'Additional metadata' if statement can never be true so remove it as well. Signed-off-by:
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John Hurley authored
Remove the matching of mac/mpls as a default selection. These are not necessarily set by a TC rule (unlike the port). Previously a mac/mpls field would exist in every match and be masked out if not used. This patch has no impact on functionality but removes unnessary memory assignment in the match cmsg. Signed-off-by:
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Fabio Estevam authored
The GPIO polarity passed to phy-reset-gpio is ignored by the FEC driver and it is assumed to be active low. It can be active high only when the 'phy-reset-active-high' property is present. The current examples pass active high polarity and work fine, but in order to improve the documentation make it explicit what the real polarity is. Signed-off-by:
Fabio Estevam <fabio.estevam@nxp.com> Acked-by:
Fugang Duan <fugang.duan@nxp.com> Signed-off-by:
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David S. Miller authored
Xin Long says: ==================== sctp: Implement Stream Interleave: The I-DATA Chunk Supporting User Message Interleaving Stream Interleave would be Implemented in two Parts: 1. The I-DATA Chunk Supporting User Message Interleaving 2. Interaction with Other SCTP Extensions Overview in section 1.1 of RFC8260 for Part 1: This document describes a new chunk carrying payload data called I-DATA. This chunk incorporates the properties of the current SCTP DATA chunk, all the flags and fields except the Stream Sequence Number (SSN), and also adds two new fields in its chunk header -- the Fragment Sequence Number (FSN) and the Message Identifier (MID). The FSN is only used for reassembling all fragments that have the same MID and the same ordering property. The TSN is only used for the reliable transfer in combination with Selective Acknowledgment (SACK) chunks. In addition, the MID is also used for ensuring ordered delivery instead of using the stream sequence number (the I-DATA chunk omits an SSN). As the 1st part of Stream Interleave Implementation, this patchset adds an ops framework named sctp_stream_interleave with a bunch of stuff that does lots of things needed somewhere. Then it defines sctp_stream_interleave_0 to work for normal DATA chunks and sctp_stream_interleave_1 for I-DATA chunks. With these functions, hundreds of if-else checks for the different process on I-DATA chunks would be avoided. Besides, very few codes could be shared in these two function sets. In this patchset, it adds some basic variables, structures and socket options firstly, then implement these functions one by one to add the procedures for ordered idata gradually, at last adjusts some codes to make them work for unordered idata. To make it safe to be implemented and also not break the normal data chunk process, this feature can't be enabled to use until all stream interleave codes are completely accomplished. v1 -> v2: - fixed a checkpatch warning that a blank line was missed. - avoided a kbuild warning reported from gcc-4.9. ==================== Signed-off-by: -
Xin Long authored
Unordered idata process is more complicated than unordered data: - It has to add mid into sctp_stream_out to save the next mid value, which is separated from ordered idata's. - To support pd for unordered idata, another mid and pd_mode need to be added to save the message id and pd state in sctp_stream_in. - To make unordered idata reasm easier, it adds a new event queue to save frags for idata. The patch mostly adds the samilar reasm functions for unordered idata as ordered idata's, and also adjusts some other codes on assign_mid, abort_pd and ulpevent_data for idata. Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
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Xin Long authored
abort_pd is added as a member of sctp_stream_interleave, used to abort partial delivery for data or idata, called in sctp_cmd_assoc_failed. Since stream interleave allows to do partial delivery for each stream at the same time, sctp_intl_abort_pd for idata would be very different from the old function sctp_ulpq_abort_pd for data. Note that sctp_ulpevent_make_pdapi will support per stream in this patch by adding pdapi_stream and pdapi_seq in sctp_pdapi_event, as described in section 6.1.7 of RFC6458. Signed-off-by:
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Xin Long authored
start_pd is added as a member of sctp_stream_interleave, used to do partial_delivery for data or idata when datalen >= asoc->rwnd in sctp_eat_data. The codes have been done in last patches, but they need to be extracted into start_pd, so that it could be used for SCTP_CMD_PART_DELIVER cmd as well. Signed-off-by:
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Xin Long authored
renege_events is added as a member of sctp_stream_interleave, used to renege some old data or idata in reasm or lobby queue properly to free some memory for the new data when there's memory stress. It defines sctp_renege_events for idata, and leaves sctp_ulpq_renege as it is for data. Signed-off-by:
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Xin Long authored
enqueue_event is added as a member of sctp_stream_interleave, used to enqueue either data, idata or notification events into user socket rx queue. It replaces sctp_ulpq_tail_event used in the other places with enqueue_event. Signed-off-by:
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Xin Long authored
ulpevent_data is added as a member of sctp_stream_interleave, used to do the most process in ulpq, including to convert data or idata chunk to event, reasm them in reasm queue and put them in lobby queue in right order, and deliver them up to user sk rx queue. This procedure is described in section 2.2.3 of RFC8260. It adds most functions for idata here to do the similar process as the old functions for data. But since the details are very different between them, the old functions can not be reused for idata. event->ssn and event->ppid settings are moved to ulpevent_data from sctp_ulpevent_make_rcvmsg, so that sctp_ulpevent_make_rcvmsg could work for both data and idata. Note that mid is added in sctp_ulpevent for idata, __packed has to be used for defining sctp_ulpevent, or it would exceeds the skb cb that saves a sctp_ulpevent variable for ulp layer process. Signed-off-by:
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Xin Long authored
validate_data is added as a member of sctp_stream_interleave, used to validate ssn/chunk type for data or mid (message id)/chunk type for idata, called in sctp_eat_data. If this check fails, an abort packet will be sent, as said in section 2.2.3 of RFC8260. It also adds the process for idata in rx path. As Marcelo pointed out, there's no need to add event table for idata, but just share chunk_event_table with data's. It would drop data chunk for idata and drop idata chunk for data by calling validate_data in sctp_eat_data. As last patch did, it also replaces sizeof(struct sctp_data_chunk) with sctp_datachk_len for rx path. After this patch, the idata can be accepted and delivered to ulp layer. Signed-off-by:
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Xin Long authored
assign_number is added as a member of sctp_stream_interleave, used to assign ssn for data or mid (message id) for idata, called in sctp_packet_append_data. sctp_chunk_assign_ssn is left as it is, and sctp_chunk_assign_mid is added for sctp_stream_interleave_1. This procedure is described in section 2.2.2 of RFC8260. All sizeof(struct sctp_data_chunk) in tx path is replaced with sctp_datachk_len, to make it right for idata as well. And also adjust sctp_chunk_is_data for SCTP_CID_I_DATA. After this patch, idata can be built and sent in tx path. Note that if sp strm_interleave is set, it has to wait_connect in sctp_sendmsg, as asoc intl_enable need to be known after 4 shake- hands, to decide if it should use data or idata later. data and idata can't be mixed to send in one asoc. Signed-off-by:
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