- 08 Apr, 2016 17 commits
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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 2016-04-07 This series contains updates to ixgbe and ixgbevf. This entire series (except for one patch from Alex) comes from Mark and is mainly to add support for our new MAC (x550em_a). So let's get Alex's patch out of the way first before we cover Mark's many changes. Alex does his enable bulk free in transmit cleanup for ixgbe and ixgbevf, like his has done for all of our other drivers. First Mark cleans up registers that were not being used, so do some house cleaning. Then to avoid casting lan_id and func fields, just make them u8 since they only hold small values anyways. Found and fixed an issue where on read operations it could be possible to modify locations beyond the length passed in, so change the check to round up in the same way. Cleaned up the interface for issuing firmware commands to use a void * instead of a u32 * which eliminates a number of casts. Added support for the new MAC and provided method pointers and use them to access IOSF-attached devices, since the new MAC will also need a new access method. Added support for SFPs with an external retimer and for an SGMII backplane interface. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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David S. Miller authored
Alexei Starovoitov says: ==================== allow bpf attach to tracepoints Hi Steven, Peter, v1->v2: addressed Peter's comments: - fixed wording in patch 1, added ack - refactored 2nd patch into 3: 2/10 remove unused __perf_addr macro which frees up an argument in perf_trace_buf_submit 3/10 split perf_trace_buf_prepare into alloc and update parts, so that bpf programs don't have to pay performance penalty for update of struct trace_entry which is not going to be accessed by bpf 4/10 actual addition of bpf filter to perf tracepoint handler is now trivial and bpf prog can be used as proper filter of tracepoints v1 cover: last time we discussed bpf+tracepoints it was a year ago [1] and the reason we didn't proceed with that approach was that bpf would make arguments arg1, arg2 to trace_xx(arg1, arg2) call to be exposed to bpf program and that was considered unnecessary extension of abi. Back then I wanted to avoid the cost of buffer alloc and field assign part in all of the tracepoints, but looks like when optimized the cost is acceptable. So this new apporach doesn't expose any new abi to bpf program. The program is looking at tracepoint fields after they were copied by perf_trace_xx() and described in /sys/kernel/debug/tracing/events/xxx/format We made a tool [2] that takes arguments from /sys/.../format and works as: $ tplist.py -v random:urandom_read int got_bits; int pool_left; int input_left; Then these fields can be copy-pasted into bpf program like: struct urandom_read { __u64 hidden_pad; int got_bits; int pool_left; int input_left; }; and the program can use it: SEC("tracepoint/random/urandom_read") int bpf_prog(struct urandom_read *ctx) { return ctx->pool_left > 0 ? 1 : 0; } This way the program can access tracepoint fields faster than equivalent bpf+kprobe program, which is the main goal of these patches. Patch 1-4 are simple changes in perf core side, please review. I'd like to take the whole set via net-next tree, since the rest of the patches might conflict with other bpf work going on in net-next and we want to avoid cross-tree merge conflicts. Alternatively we can put patches 1-4 into both tip and net-next. Patch 9 is an example of access to tracepoint fields from bpf prog. Patch 10 is a micro benchmark for bpf+kprobe vs bpf+tracepoint. Note that for actual tracing tools the user doesn't need to run tplist.py and copy-paste fields manually. The tools do it automatically. Like argdist tool [3] can be used as: $ argdist -H 't:block:block_rq_complete():u32:nr_sector' where 'nr_sector' is name of tracepoint field taken from /sys/kernel/debug/tracing/events/block/block_rq_complete/format and appropriate bpf program is generated on the fly. [1] http://thread.gmane.org/gmane.linux.kernel.api/8127/focus=8165 [2] https://github.com/iovisor/bcc/blob/master/tools/tplist.py [3] https://github.com/iovisor/bcc/blob/master/tools/argdist.py ==================== Signed-off-by: -
Alexei Starovoitov authored
the first microbenchmark does fd=open("/proc/self/comm"); for() { write(fd, "test"); } and on 4 cpus in parallel: writes per sec base (no tracepoints, no kprobes) 930k with kprobe at __set_task_comm() 420k with tracepoint at task:task_rename 730k For kprobe + full bpf program manully fetches oldcomm, newcomm via bpf_probe_read. For tracepint bpf program does nothing, since arguments are copied by tracepoint. 2nd microbenchmark does: fd=open("/dev/urandom"); for() { read(fd, buf); } and on 4 cpus in parallel: reads per sec base (no tracepoints, no kprobes) 300k with kprobe at urandom_read() 279k with tracepoint at random:urandom_read 290k bpf progs attached to kprobe and tracepoint are noop. Signed-off-by:Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Alexei Starovoitov authored
modify offwaketime to work with sched/sched_switch tracepoint instead of kprobe into finish_task_switch Signed-off-by:
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Alexei Starovoitov authored
Recognize "tracepoint/" section name prefix and attach the program to that tracepoint. Signed-off-by:
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Alexei Starovoitov authored
during bpf program loading remember the last byte of ctx access and at the time of attaching the program to tracepoint check that the program doesn't access bytes beyond defined in tracepoint fields This also disallows access to __dynamic_array fields, but can be relaxed in the future. Signed-off-by:
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Alexei Starovoitov authored
needs two wrapper functions to fetch 'struct pt_regs *' to convert tracepoint bpf context into kprobe bpf context to reuse existing helper functions Signed-off-by:
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Alexei Starovoitov authored
register tracepoint bpf program type and let it call the same set of helper functions as BPF_PROG_TYPE_KPROBE Signed-off-by:
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Alexei Starovoitov authored
introduce BPF_PROG_TYPE_TRACEPOINT program type and allow it to be attached to the perf tracepoint handler, which will copy the arguments into the per-cpu buffer and pass it to the bpf program as its first argument. The layout of the fields can be discovered by doing 'cat /sys/kernel/debug/tracing/events/sched/sched_switch/format' prior to the compilation of the program with exception that first 8 bytes are reserved and not accessible to the program. This area is used to store the pointer to 'struct pt_regs' which some of the bpf helpers will use: +---------+ | 8 bytes | hidden 'struct pt_regs *' (inaccessible to bpf program) +---------+ | N bytes | static tracepoint fields defined in tracepoint/format (bpf readonly) +---------+ | dynamic | __dynamic_array bytes of tracepoint (inaccessible to bpf yet) +---------+ Not that all of the fields are already dumped to user space via perf ring buffer and broken application access it directly without consulting tracepoint/format. Same rule applies here: static tracepoint fields should only be accessed in a format defined in tracepoint/format. The order of fields and field sizes are not an ABI. Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by:
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Alexei Starovoitov authored
split allows to move expensive update of 'struct trace_entry' to later phase. Repurpose unused 1st argument of perf_tp_event() to indicate event type. While splitting use temp variable 'rctx' instead of '*rctx' to avoid unnecessary loads done by the compiler due to -fno-strict-aliasing Signed-off-by:
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Alexei Starovoitov authored
now all calls to perf_trace_buf_submit() pass 0 as 4th argument which will be repurposed in the next patch which will change the meaning of 1st arg of perf_tp_event() to event_type Signed-off-by:
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Alexei Starovoitov authored
avoid memset in perf_fetch_caller_regs, since it's the critical path of all tracepoints. It's called from perf_sw_event_sched, perf_event_task_sched_in and all of perf_trace_##call with this_cpu_ptr(&__perf_regs[..]) which are zero initialized by perpcu init logic and subsequent call to perf_arch_fetch_caller_regs initializes the same fields on all archs, so we can safely drop memset from all of the above cases and move it into perf_ftrace_function_call that calls it with stack allocated pt_regs. Acked-by:
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David S. Miller authored
Needs to be protected with CONFIG_LOCKDEP. Based upon a patch by Hannes Frederic Sowa. Signed-off-by: -
Mark Rustad authored
Update ixgbe version number. Signed-off-by:
Mark Rustad <mark.d.rustad@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Mark Rustad authored
Add support for x550em_a-based KR backplane devices. Signed-off-by:
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Mark Rustad authored
Add support for an SGMII backplane interface. Signed-off-by:
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Mark Rustad authored
Add support for SFPs with an external retimer. Signed-off-by:
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- 07 Apr, 2016 23 commits
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Mark Rustad authored
Move code that controls MDIO speed into a new function because there will be more MACs that need the control. Signed-off-by:
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Mark Rustad authored
Read the IXGBE_NW_MNG_IF_SEL register and use it to set interface attributes. Signed-off-by:
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Mark Rustad authored
Read the instance number from EEPROM and save it for later use. Signed-off-by:
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Mark Rustad authored
Now x550em_a devices will use a new method for PHY access that will get the firmware token for each access. Signed-off-by:
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Mark Rustad authored
Add support for x550em_a 10G MAC type to the ixgbe driver. The new MAC includes new firmware commands that need to be used to control PHY and IOSF access, so that support is also added. The interface supported is a native SFP+ interface. Signed-off-by:
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Mark Rustad authored
Provide method pointers and use them to access IOSF-attached devices. A new MAC will introduce a new access method. Signed-off-by:
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Mark Rustad authored
Add definitions for a x550em_a 10G MAC device with a native SFP interface. Signed-off-by:
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Mark Rustad authored
Add support for a single-port X550 device. Signed-off-by:
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Alexander Duyck authored
This patch enables bulk free in Tx cleanup for ixgbevf and cleans up the boolean logic in the polling routines for ixgbe and ixgbevf in the hopes of avoiding any mix-ups similar to what occurred with i40e and i40evf. Signed-off-by:
Alexander Duyck <aduyck@mirantis.com> Tested-by:
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Mark Rustad authored
We need to take the manageability semaphore when issuing firmware commands to avoid problems. With this in place, the semaphore is no longer taken in the ixgbe_set_fw_drv_ver_generic function, since it will now always be taken by the ixgbe_host_interface_command function. Signed-off-by:
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Mark Rustad authored
Clean up the interface for issuing firmware commands to use a void * instead of a u32 *. This eliminates a number of casts. Also clean up ixgbe_host_interface_command in a few other ways, eliminating comparisons with 0, redundant parens and minor formatting issues. Signed-off-by:
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Mark Rustad authored
The function ixgbe_host_interface_command actually uses a multiple of word sized buffer to do its business, but only checks against the actual length passed in. This means that on read operations it could be possible to modify locations beyond the length passed in. Change the check to round up in the same way, just to avoid any possible hazard. Signed-off-by:
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Mark Rustad authored
Since the lan_id and func fields only ever hold small values, make them u8 to avoid casts used to silence warnings. Signed-off-by:
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Mark Rustad authored
I noticed the SRAMREL registers are not referenced for any device, so delete the definitions. Signed-off-by:
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Hannes Frederic Sowa authored
I forgot to add inline to lockdep_sock_is_held, so it generated all kinds of build warnings if not build with lockdep support. Reported-by:
kbuild test robot <fengguang.wu@intel.com> Signed-off-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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David S. Miller authored
Jon Maloy says: ==================== tipc: some small fixes When fix a minor buffer leak, and ensure that bearers filter packets correctly while they are being shut down. v2: Corrected typos in commit #3, as per feedback from S. Shtylyov v3: Removed commit #3 from the series. Improved version will be re-submitted later. ==================== Signed-off-by: -
Jon Paul Maloy authored
Resetting a bearer/interface, with the consequence of resetting all its pertaining links, is not an atomic action. This becomes particularly evident in very large clusters, where a lot of traffic may happen on the remaining links while we are busy shutting them down. In extreme cases, we may even see links being re-created and re-established before we are finished with the job. To solve this, we now introduce a solution where we temporarily detach the bearer from the interface when the bearer is reset. This inhibits all packet reception, while sending still is possible. For the latter, we use the fact that the device's user pointer now is zero to filter out which packets can be sent during this situation; i.e., outgoing RESET messages only. This filtering serves to speed up the neighbors' detection of the loss event, and saves us from unnecessary probing. Acked-by:
Ying Xue <ying.xue@windriver.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Jon Paul Maloy authored
When enabling a bearer we create a 'neigbor discoverer' instance by calling the function tipc_disc_create() before the bearer is actually registered in the list of enabled bearers. Because of this, the very first discovery broadcast message, created by the mentioned function, is lost, since it cannot find any valid bearer to use. Furthermore, the used send function, tipc_bearer_xmit_skb() does not free the given buffer when it cannot find a bearer, resulting in the leak of exactly one send buffer each time a bearer is enabled. This commit fixes this problem by introducing two changes: 1) Instead of attemting to send the discovery message directly, we let tipc_disc_create() return the discovery buffer to the calling function, tipc_enable_bearer(), so that the latter can send it when the enabling sequence is finished. 2) In tipc_bearer_xmit_skb(), as well as in the two other transmit functions at the bearer layer, we now free the indicated buffer or buffer chain when a valid bearer cannot be found. Acked-by:
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David S. Miller authored
Tom Herbert says: ==================== udp: GRO in UDP sockets This patch set adds GRO functions (gro_receive and gro_complete) to UDP sockets and removes udp_offload infrastructure. Add GRO functions (gro_receive and gro_complete) to UDP sockets. In udp_gro_receive and udp_gro_complete a socket lookup is done instead of looking up the port number in udp_offloads. If a socket is found and there are GRO functions for it then those are called. This feature allows binding GRO functions to more than just a port number. Eventually, we will be able to use this technique to allow application defined GRO for an application protocol by attaching BPF porgrams to UDP sockets for doing GRO. In order to implement these functions, we added exported udp6_lib_lookup_skb and udp4_lib_lookup_skb functions in ipv4/udp.c and ipv6/udp.c. Also, inet_iif and references to skb_dst() were changed to check that dst is set in skbuf before derefencing. In the GRO path there is now a UDP socket lookup performed before dst is set, to the get the device in that case we simply use skb->dev. Tested: Ran various combinations of VXLAN and GUE TCP_STREAM and TCP_RR tests. Did not see any material regression. ==================== Signed-off-by: -
Tom Herbert authored
Now that the UDP encapsulation GRO functions have been moved to the UDP socket we not longer need the udp_offload insfrastructure so removing it. Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
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Tom Herbert authored
Adapt geneve_gro_receive, geneve_gro_complete to take a socket argument. Set these functions in tunnel_config. Don't set udp_offloads any more. Signed-off-by:
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Tom Herbert authored
Adapt gue_gro_receive, gue_gro_complete to take a socket argument. Don't set udp_offloads any more. Signed-off-by:
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Tom Herbert authored
Adapt vxlan_gro_receive, vxlan_gro_complete to take a socket argument. Set these functions in tunnel_config. Don't set udp_offloads any more. Signed-off-by:
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