Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.
Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.
Document these new interfaces with man pages, and oversight from before.
Reviewed by: jhb, bcr
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D29937
The NTB hardware starting with Skylake has some changes to the register
map and the doorbell interface. Add a new NTB_XEON_GEN3 device type and
use it to conditionalize driver logic that differs from the existing
Xeon code.
Reviewed by: vangyzen
Discussed with: cem, Bret Ketchum <Bret.Ketchum@dell.com>
MFC after: 1 month
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D26683
ubuf buffer is too small. It should be 18 if a NULL is not needed,
or 19 to hold the NULL terminator for the full 64-BIT value plus
the 0x prefix.
Submitted by: bret_ketchum@dell.com
Reviewed by: markj mav
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D26893
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked).
Use it in preparation for a general review of all nodes.
This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.
Mark all obvious cases as MPSAFE. All entries that haven't been marked
as MPSAFE before are by default marked as NEEDGIANT
Approved by: kib (mentor, blanket)
Commented by: kib, gallatin, melifaro
Differential Revision: https://reviews.freebsd.org/D23718
switch over to opt-in instead of opt-out for epoch.
Instead of IFF_NEEDSEPOCH, provide IFF_KNOWSEPOCH. If driver marks
itself with IFF_KNOWSEPOCH, then ether_input() would not enter epoch
when processing its packets.
Now this will create recursive entrance in epoch in >90% network
drivers, but will guarantee safeness of the transition.
Mark several tested drivers as IFF_KNOWSEPOCH.
Reviewed by: hselasky, jeff, bz, gallatin
Differential Revision: https://reviews.freebsd.org/D23674
supposedly may call into ether_input() without network epoch.
They all need to be reviewed before 13.0-RELEASE. Some may need
be fixed. The flag is not planned to be used in the kernel for
a long time.
I have no good explanation why it happens, but I found that in B2B mode
at least Xeon v4 NTB leaks accesses to its configuration memory at BAR0
originated from the link side to its host side. DMAR predictably blocks
those, making access to remote scratchpad registers in B2B mode impossible.
This change creates identity mapping in DMAR covering the BAR0 addresses,
making the NTB work fine with DMAR enabled. It seems like allowing single
4KB range at 32KB offset may be enough, but I don't see a reason to be so
specific.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
PLX NTB sends translated DMA requests not only from itsels, but from all
slots and functions of its bus. By default DMAR blocks those additional.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Previously ntb_transport(4) required at least 6 scratchpad registers,
plus 2 more for each additional memory window. That is too much for some
configurations, where several drivers have to share resources of the same
NTB hardware. This patch introduces new compact version of the protocol,
requiring only 3 scratchpad registers, plus one more for each additional
memory window. The optimization is based on fact that neither of version,
number of windows or number of queue pairs really need more then one byte
each, and window sizes of 4GB are not very useful now. The new protocol
is activated automatically when the configuration is low on scratchpad
registers, or it can be activated explicitly with loader tunable.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
Address Lookup Table (A-LUT) being enabled allows to specify separate
translation for each 1/128th or 1/256th of the BAR2. Previously it was
used only to limit effective window size by blocking access through some
of A-LUT elements. This change allows A-LUT elements to also point
different memory locations, providing to upper layers several (up to 128)
independent memory windows. A-LUT hardware allows even more flexible
configurations than this, but NTB KPI have no way to manage that now.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
NTB Tool driver is meant for testing NTB hardware driver functionalities,
such as doorbell interrupts, link events, scratchpad registers and memory
windows. This is a port of ntb_tool driver from Linux. It has been
verified on top of AMD and PLX NTB HW drivers.
Submitted by: Arpan Palit <arpan.palit@amd.com>
Cleaned up by: mav
MFC after: 2 weeks
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D18819
This adds safety net for the case of misconfigured NTB with too big
memory window, for which we may be unable to allocate a memory buffer,
which does not make much sense for the network interface. While there,
fix the code to really work with asymmetric window sizes setup.
This makes driver just print warning message on boot instead of hanging
if too large memory window is configured.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
This restores parity with AMD NTB driver. Though without any drivers
supporting more then one peer and respective KPI modification to pass
peer index to most of the calls this addition is pretty useless now.
MFC after: 2 weeks
This patch is the driver for NTB hardware in AMD SoCs (ported from Linux)
and enables the NTB infrastructure like Doorbells, Scratchpads and Memory
window in AMD SoC. This driver has been validated using ntb_transport and
if_ntb driver already available in FreeBSD.
Submitted by: Rajesh Kumar <rajesh1.kumar@amd.com>
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D18774
This allows replacing "sys/eventfilter.h" includes with "sys/_eventfilter.h"
in other header files (e.g., sys/{bus,conf,cpu}.h) and reduces header
pollution substantially.
EVENTHANDLER_DECLARE and EVENTHANDLER_LIST_DECLAREs were moved out of .c
files into appropriate headers (e.g., sys/proc.h, powernv/opal.h).
As a side effect of reduced header pollution, many .c files and headers no
longer contain needed definitions. The remainder of the patch addresses
adding appropriate includes to fix those files.
LOCK_DEBUG and LOCK_FILE_LINE_ARG are moved to sys/_lock.h, as required by
sys/mutex.h since r326106 (but silently protected by header pollution prior
to this change).
No functional change (intended). Of course, any out of tree modules that
relied on header pollution for sys/eventhandler.h, sys/lock.h, or
sys/mutex.h inclusion need to be fixed. __FreeBSD_version has been bumped.
Its a hack, we can't know/list all DMA engines, but this covers all
I/OAT of Xeon E5/E7 at least from Sandy Bridge till Skylake I saw.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Remove unused and easy to misuse PNP macro parameter
Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely. The 'table' parameter is now required to
have correct pointer (or array) type. Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.
Mostly done with the coccinelle 'spatch' tool:
$ cat modpnpsize0.cocci
@normaltables@
identifier b,c;
expression a,d,e;
declarer MODULE_PNP_INFO;
@@
MODULE_PNP_INFO(a,b,c,d,
-sizeof(d[0]),
e);
@singletons@
identifier b,c,d;
expression a;
declarer MODULE_PNP_INFO;
@@
MODULE_PNP_INFO(a,b,c,&d,
-sizeof(d),
1);
$ rg -l MODULE_PNP_INFO -- sys | \
xargs spatch --in-place --sp-file modpnpsize0.cocci
(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not. So I had to link gdiff into
PATH as diff to use spatch.)
Tinderbox'd (-DMAKE_JUST_KERNELS).
Approved by: re (glen)
I was not aware Warner was making or planning to make forward progress in
this area and have since been informed of that.
It's easy to apply/reapply when churn dies down.
Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely. The 'table' parameter is now required to
have correct pointer (or array) type. Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.
Mostly done with the coccinelle 'spatch' tool:
$ cat modpnpsize0.cocci
@normaltables@
identifier b,c;
expression a,d,e;
declarer MODULE_PNP_INFO;
@@
MODULE_PNP_INFO(a,b,c,d,
-sizeof(d[0]),
e);
@singletons@
identifier b,c,d;
expression a;
declarer MODULE_PNP_INFO;
@@
MODULE_PNP_INFO(a,b,c,&d,
-sizeof(d),
1);
$ rg -l MODULE_PNP_INFO -- sys | \
xargs spatch --in-place --sp-file modpnpsize0.cocci
(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not. So I had to link gdiff into
PATH as diff to use spatch.)
Tinderbox'd (-DMAKE_JUST_KERNELS).
We may not have enough contiguous memory later, when NTB connection get
established. It is quite likely that NTB windows are symmetric and this
allocation remain, but even if not, we will just reallocate it later.
MFC after: 2 weeks
I suppose it should make this code NUMA-aware with recent NUMA drop-in,
trying to allocate shared memory buffers from domain closer to NT-bridge.
MFC after: 2 weeks
When enabled by EEPROM, use it to relax translation address/size alignment
requirements for BAR2 window by 128 or 256 times.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
An eventual devd(8) or other component should be able to scan buses and
automatically load drivers that match device ids described in this metadata.
Reviewed by: imp
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D12364
There is no big need to burn CPU if other side may be not there yet. For
example, the PLX hardware by default enables the NTB link up on reset, not
dependig on driver to do it. In case of Intel hardware this also reduces
race between MSI-X workaround negotiation and upper layers, using the same
scratchpad registers in different time.
MFC after: 12 days
In theory this allows to avoid one more expensive doorbell register read
later in some scenarios. But in practice it also significantly increases
packet rate on PLX hardware, that I can't explain yet, possibly work-
arounding some interrupt delays.
MFC after: 13 days
Sponsored by: iXsystems, Inc.
