git: ff28ca091142 - stable/14 - iflib: Add sysctl to request extra MSIX vectors on driver load
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Date: Wed, 24 Apr 2024 22:14:59 UTC
The branch stable/14 has been updated by erj: URL: https://cgit.FreeBSD.org/src/commit/?id=ff28ca091142538330b3469be7c9af678db65107 commit ff28ca091142538330b3469be7c9af678db65107 Author: Eric Joyner <erj@FreeBSD.org> AuthorDate: 2023-03-22 19:18:44 +0000 Commit: Eric Joyner <erj@FreeBSD.org> CommitDate: 2024-04-24 22:14:48 +0000 iflib: Add sysctl to request extra MSIX vectors on driver load Intended to be used with upcoming feature to add sub-interfaces, since those new interfaces will be dynamically created and will need to have spare MSI-X interrupts already allocated for them on driver load. This sysctl is marked as a tunable since it will need to be set before the driver is loaded since MSI-X interrupt allocation and setup is done during the attach process. Signed-off-by: Eric Joyner <erj@FreeBSD.org> Sponsored by: Intel Corporation Differential Revision: https://reviews.freebsd.org/D41326 (cherry picked from commit 3c7da27a473e339392121404e06c506df040c16f) --- sys/net/iflib.c | 14 ++++++++++++++ sys/net/iflib.h | 1 + 2 files changed, 15 insertions(+) diff --git a/sys/net/iflib.c b/sys/net/iflib.c index 999a86fabc79..ac27450480c9 100644 --- a/sys/net/iflib.c +++ b/sys/net/iflib.c @@ -194,6 +194,7 @@ struct iflib_ctx { #define CORE_OFFSET_UNSPECIFIED 0xffff uint8_t ifc_sysctl_separate_txrx; uint8_t ifc_sysctl_use_logical_cores; + uint16_t ifc_sysctl_extra_msix_vectors; bool ifc_cpus_are_physical_cores; qidx_t ifc_sysctl_ntxds[8]; @@ -264,6 +265,13 @@ iflib_get_sctx(if_ctx_t ctx) return (ctx->ifc_sctx); } +uint16_t +iflib_get_extra_msix_vectors_sysctl(if_ctx_t ctx) +{ + + return (ctx->ifc_sysctl_extra_msix_vectors); +} + #define IP_ALIGNED(m) ((((uintptr_t)(m)->m_data) & 0x3) == 0x2) #define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*)) #define CACHE_PTR_NEXT(ptr) ((void *)(((uintptr_t)(ptr)+CACHE_LINE_SIZE-1) & (CACHE_LINE_SIZE-1))) @@ -6802,6 +6810,12 @@ iflib_add_device_sysctl_pre(if_ctx_t ctx) SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "use_logical_cores", CTLFLAG_RDTUN, &ctx->ifc_sysctl_use_logical_cores, 0, "try to make use of logical cores for TX and RX"); + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "use_extra_msix_vectors", + CTLFLAG_RDTUN, &ctx->ifc_sysctl_extra_msix_vectors, 0, + "attempt to reserve the given number of extra MSI-X vectors during driver load for the creation of additional interfaces later"); + SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "allocated_msix_vectors", + CTLFLAG_RDTUN, &ctx->ifc_softc_ctx.isc_vectors, 0, + "total # of MSI-X vectors allocated by driver"); /* XXX change for per-queue sizes */ SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds", diff --git a/sys/net/iflib.h b/sys/net/iflib.h index b16e2805aab6..5e1adccf202c 100644 --- a/sys/net/iflib.h +++ b/sys/net/iflib.h @@ -489,5 +489,6 @@ void iflib_led_create(if_ctx_t ctx); void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *, if_int_delay_info_t, int, int); +uint16_t iflib_get_extra_msix_vectors_sysctl(if_ctx_t ctx); #endif /* __IFLIB_H_ */