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path: root/sys/dev/netmap/netmap_kloop.c
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* netmap: silence -Wdefault-const-init-field-unsafe warningAlex Richardson2025-12-161-2/+4
| | | | | | | | | | | | | | | | | | | | | | | The netmap_ring struct starts with various const members and rencent clang warns about leaving them uninitialized. Having them const in the first place is highly suspicious since they are updated with various macros but using hand-coded __DECONST(). But fixing that is a more invasive change that I am unable to test. ``` .../freebsd/sys/dev/netmap/netmap_kloop.c:320:21: error: default initialization of an object of type 'struct netmap_ring' with const member leaves the object uninitialized [-Werror,-Wdefault-const-init-field-unsafe] 320 | struct netmap_ring shadow_ring; /* shadow copy of the netmap_ring */ | ^ .../freebsd/sys/net/netmap.h:290:16: note: member 'buf_ofs' declared 'const' here 290 | const int64_t buf_ofs; | ^ ``` Test Plan: Compiles Reviewed by: vmaffione, jhb MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D52568
* sys: Automated cleanup of cdefs and other formattingWarner Losh2023-11-271-1/+1
| | | | | | | | | | | | | | | | Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
* sys: Remove $FreeBSD$: two-line .h patternWarner Losh2023-08-161-2/+0
| | | | Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
* Mechanically convert netmap(4) to IfAPIJustin Hibbits2023-02-141-1/+1
| | | | | | Reviewed by: vmaffione, zlei Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D37814
* netmap(4): Remove a double word in a source code commentGordon Bergling2022-09-041-1/+1
| | | | | | - s/the the/the/ MFC after: 3 days
* netmap: Move more_txspace and some_recvd under #ifdef SYNC_KLOOP_POLL.John Baldwin2022-04-091-0/+8
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* netmap: several typo fixesVincenzo Maffione2021-04-021-6/+6
| | | | No functional changes intended.
* netmap: import changes from upstream (SHA 137f537eae513)Vincenzo Maffione2019-09-011-9/+2
| | | | | | | | | | | - Rework option processing. - Use larger integers for memory size values in the memory management code. MFC after: 2 weeks Notes: svn path=/head/; revision=351657
* netmap: upgrade sync-kloop supportVincenzo Maffione2019-02-021-98/+309
| | | | | | | | | | Add SYNC_KLOOP_MODE option, and add support for direct mode, where application executes the TXSYNC and RXSYNC in the context of the ioeventfd wake up callback. MFC after: 5 days Notes: svn path=/head/; revision=343689
* netmap: add notifications on kloop stopVincenzo Maffione2019-01-291-9/+24
| | | | | | | | | | | On sync-kloop stop, send a wake-up signal to the kloop, so that waiting for the timeout is not needed. Also, improve logging in netmap_freebsd.c. MFC after: 3 days Notes: svn path=/head/; revision=343549
* netmap: improvements to the netmap kloop (CSB mode)Vincenzo Maffione2019-01-231-51/+95
| | | | | | | | | | | | | | | | | | | | | | Changelist: - Add the proper memory barriers in the kloop ring processing functions. - Fix memory barriers usage in the user helpers (nm_sync_kloop_appl_write, nm_sync_kloop_appl_read). - Fix nm_kr_txempty() helper to look at rhead rather than rcur. This is important since the kloop can read a value of rcur which is ahead of the value of rhead (see explanation in nm_sync_kloop_appl_write) - Remove obsolete ptnetmap_guest_write_kring_csb() and ptnet_guest_read_kring_csb(), and update if_ptnet(4) to use those. - Prepare in advance the arguments for netmap_sync_kloop_[tr]x_ring(), to make the kloop faster. - Provide kernel and user implementation for nm_ldld_barrier() and nm_ldst_barrier() MFC after: 2 weeks Notes: svn path=/head/; revision=343346
* netmap: fix warning in netmap_kloop.cVincenzo Maffione2018-12-121-0/+2
| | | | | | | | Reported by: markj MFC after: 3 days Notes: svn path=/head/; revision=341992
* netmap: align codebase to the current upstream (760279cfb2730a585)Vincenzo Maffione2018-12-051-0/+916
Changelist: - Replace netmap passthrough host support with a more general mechanism to call TXSYNC/RXSYNC from an in-kernel event-loop. No kernel threads are used to use this feature: the application is required to spawn a thread (or a process) and issue a SYNC_KLOOP_START (NIOCCTRL) command in the thread body. The kernel loop is executed by the ioctl implementation, which returns to userspace only when a different thread calls SYNC_KLOOP_STOP or the netmap file descriptor is closed. - Update the if_ptnet driver to cope with the new data structures, and prune all the obsolete ptnetmap code. - Add support for "null" netmap ports, useful to allocate netmap_if, netmap_ring and netmap buffers to be used by specialized applications (e.g. hypervisors). TXSYNC/RXSYNC on these ports have no effect. - Various fixes and code refactoring. Sponsored by: Sunny Valley Networks Differential Revision: https://reviews.freebsd.org/D18015 Notes: svn path=/head/; revision=341516
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