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Add NTB driver for PLX/Avago/Broadcom PCIe switches.

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This driver supports both NTB-to-NTB and NTB-to-Root Port modes (though
the second with predictable complications on hot-plug and reboot events).
I tested it with PEX 8717 and PEX 8733 chips, but expect it should work
with many other compatible ones too.  It supports up to two NT bridges
per chip, each of which can have up to 2 64-bit or 4 32-bit memory windows,
6 or 12 scratchpad registers and 16 doorbells.  There are also 4 DMA engines
in those chips, but they are not yet supported.

While there, rename Intel NTB driver from generic ntb_hw(4) to more specific
ntb_hw_intel(4), so now it is on par with this new ntb_hw_plx(4) driver and
alike to Linux naming.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2017-08-30 21:16:32 +00:00
parent f4711b38fd
commit ed9652da5f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=323032
16 changed files with 1261 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
share/man/man4/Makefile
View File

@ -373,7 +373,9 @@ MAN= aac.4 \
ng_vlan.4 \
nmdm.4 \
nsp.4 \
${_ntb_hw.4} \
${_ntb.4} \
${_ntb_hw_intel.4} \
${_ntb_hw_plx.4} \
${_ntb_transport.4} \
${_if_ntb.4} \
null.4 \
@ -686,7 +688,6 @@ MLINKS+=netintro.4 net.4 \
netintro.4 networking.4
MLINKS+=${_nfe.4} ${_if_nfe.4}
MLINKS+=nge.4 if_nge.4
MLINKS+=${_ntb_hw.4} ${_ntb.4}
MLINKS+=${_nxge.4} ${_if_nxge.4}
MLINKS+=ow.4 onewire.4
MLINKS+=pccbb.4 cbb.4
@ -834,7 +835,8 @@ _xnb.4= xnb.4
_if_ntb.4= if_ntb.4
_ioat.4= ioat.4
_ntb.4= ntb.4
_ntb_hw.4= ntb_hw.4
_ntb_hw_intel.4= ntb_hw_intel.4
_ntb_hw_plx.4= ntb_hw_plx.4
_ntb_transport.4=ntb_transport.4
_qlxge.4= qlxge.4
_qlxgb.4= qlxgb.4

12
share/man/man4/if_ntb.4
View File

@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 29, 2016
.Dd August 30, 2017
.Dt IF_NTB 4
.Os
.Sh NAME
@ -35,6 +35,8 @@
To compile this driver into your kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ntb"
.Cd "device ntb_transport"
.Cd "device if_ntb"
.Ed
.Pp
@ -56,11 +58,11 @@ The
.Nm
driver attaches on top of the
.Xr ntb_transport 4
driver to utilize its resources to create virtual Ethernet interface between
the systems.
Interface capabilities depend on the underlying transport.
driver to utilize its resources to create virtual Ethernet network interface
between the systems.
It supports as many tx/rx queues as provided by underlying
.Xr ntb_transport 4 .
Typical MTU is about 64KB to reduce overhead.
By default one queue is used, but more may be configured.
The MAC address for interface is randomly generated.
.Pp
The

91
share/man/man4/ntb.4 Normal file
View File

@ -0,0 +1,91 @@
.\"
.\" Copyright (c) 2017 Alexander Motin <mav@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd August 30, 2017
.Dt NTB 4
.Os
.Sh NAME
.Nm ntb
.Nd Non-Transparent Bridge subsystem
.Sh SYNOPSIS
To compile it into your kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ntb"
.Ed
.Pp
Or, to load it as a module at boot, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
ntb_load="YES"
.Ed
.Pp
The following tunables are settable from the
.Xr loader 8 :
.Bl -ohang
.It Va hw.ntb.debug_level
Driver debug level.
The default value is 0, higher means more verbose.
.It Va hint.ntb_hw. Ns Ar X Ns Va .config
Configures NTB resources split between several consumer devices.
Configuration of multiple consumer devices separated by commas.
Each device can be configured as: "[<name>][:<mw>[:<spad>[:<db>]]]", where:
.Va name
is a name of the driver which should attach the device (empty means any),
.Va mw
is a number of memory windows to allocate (empty means all available),
.Va spad
is a number of scratchpad registers to allocate (empty means all available),
.Va db
is a number of doorbells to allocate (empty means all available).
The default configuration is empty string, which means single device
with all available resources allowing any driver attachment.
.El
.Sh DESCRIPTION
Non-Transparent Bridges allow to connect two computer systems with PCIe
link(s), providing each of them limited access to others memory space,
scratchpad registers and interrupts.
The
.Nm
subsystem uses those resources provided in generic way by hardware drivers
and splits them between multiple consumer drivers, according to specified
configuration.
.Sh SEE ALSO
.Xr if_ntb 4 ,
.Xr ntb_transport 4 ,
.Xr ntb_hw_intel 4 ,
.Xr ntb_hw_plx 4
.Sh AUTHORS
.An -nosplit
The
.Nm
subsystem was developed by Intel and originally written by
.An Carl Delsey Aq Mt carl@FreeBSD.org .
Later improvements were done by
.An Conrad E. Meyer Aq Mt cem@FreeBSD.org
and
.An Alexander Motin Aq Mt mav@FreeBSD.org .

66
share/man/man4/ntb_hw.4 → share/man/man4/ntb_hw_intel.4
View File

@ -1,5 +1,5 @@
.\"
.\" Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org>
.\" Copyright (c) 2016-2017 Alexander Motin <mav@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@ -25,66 +25,45 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 28, 2016
.Dt NTB_HW 4
.Dd August 30, 2017
.Dt NTB_HW_INTEL 4
.Os
.Sh NAME
.Nm ntb ,
.Nm ntb_hw
.Nm ntb_hw_intel
.Nd Intel(R) Non-Transparent Bridge driver
.Sh SYNOPSIS
To compile this driver into your kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ntb_hw"
.Cd "device ntb"
.Cd "device ntb_hw_intel"
.Ed
.Pp
Or, to load the driver as a module at boot, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
ntb_hw_load="YES"
ntb_hw_intel_load="YES"
.Ed
.Pp
The following tunables are settable from the
.Xr loader 8 :
.Bl -ohang
.It Va hw.ntb.debug_level
Driver debug level.
The default value is 0, higher means more verbose.
.It Va hint.ntb_hw. Ns Ar X Ns Va .config
Configures NTB resources split between several consumer devices.
Configuration of multiple consumer devices separated by commas.
Each device can be configured as: "<name>[:<mw>[:<spad>[:<db>]]]", where:
.Va name
is a name of the driver which should attach the device (empty means any),
.Va mw
is a number of memory windows to allocate (empty means all available),
.Va spad
is a number of scratchpad registers to allocate (empty means all available),
.Va db
is a number of doorbells to allocate (empty means all available).
The default configuration is empty string, which means single device
with all available resources allowing any driver attachment.
.El
.Sh DESCRIPTION
The NTB allows you to connect two computer systems using a PCIe link if they
have the correct equipment and connectors.
The
.Nm ntb_hw
driver provides support for the Non-Transparent Bridge (NTB) in the Intel S1200
and Xeon E3/E5 processor families.
The
.Nm
driver hides hardware details, exposing memory windows, scratchpads and
doorbells via hardware independent KPI.
.Nm ntb_hw_intel
driver provides support for the Non-Transparent Bridge (NTB) hardware in
Intel Xeon E3/E5 and S1200 processor families, which allow one of their PCIe
ports to be switched from transparent to non-transparent bridge mode.
In this mode bridge looks not as a PCI bridge, but as PCI endpoint device.
The driver hides hardware details, exposing memory windows, scratchpads
and doorbells of the other side via hardware independent KPI to
.Xr ntb 4
subsystem.
.Pp
The hardware provides 2-3 memory windows to the other system's memory,
16 scratchpad registers and 14/34 doorbells to interrupt the other system.
The hardware provides 2 or 3 memory windows to the other system's memory,
16 scratchpad registers and 14 or 34 doorbells to interrupt the other system.
On Xeon processors one of memory windows is typically consumed by the driver
to workaround multiple hardware erratas.
itself to workaround multiple hardware erratas.
.Sh CONFIGURATION
The NTB configuration should be set by BIOS.
It includes enabling NTB, choosing between NTB-to-NTB or NTB-to-Root Port mode,
It includes enabling NTB, choosing between NTB-to-NTB (back-to-back) or
NTB-to-Root Port mode,
enabling split BAR mode (one of two 64-bit BARs can be split into two 32-bit
ones) and configuring BAR sizes in bits (from 12 to 29/39) for both NTB sides.
.Pp
@ -93,7 +72,8 @@ all BAR sizes are set to 20 (1 MiB).
This needs to be done on both systems.
.Sh SEE ALSO
.Xr if_ntb 4 ,
.Xr ntb_transport 4
.Xr ntb_transport 4 ,
.Xr ntb 4 ,
.Sh AUTHORS
.An -nosplit
The

118
share/man/man4/ntb_hw_plx.4 Normal file
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@ -0,0 +1,118 @@
.\"
.\" Copyright (c) 2017 Alexander Motin <mav@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd August 30, 2017
.Dt NTB_HW_PLX 4
.Os
.Sh NAME
.Nm ntb_hw_plx
.Nd PLX/Avago/Broadcom Non-Transparent Bridge driver
.Sh SYNOPSIS
To compile this driver into your kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ntb"
.Cd "device ntb_hw_plx"
.Ed
.Pp
Or, to load the driver as a module at boot, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
ntb_hw_plx_load="YES"
.Ed
.Pp
The following tunables are settable from the
.Xr loader 8 :
.Bl -ohang
.It Va hint.ntb_hw. Ns Ar X Ns Va .b2b
Being set to 1 (default) tells the driver attached to Virtual Interface of the
NTB that it works in NTB-to-NTB (back-to-back) mode, 0 -- NTB-to-Root Port.
Driver attached to Link Interface (visible from Root Port side) switches to
NTB-to-Root Port mode automatically, but one attached to Virtual Interface
can't detect what is on the other side and require external knowledge.
.El
.Sh DESCRIPTION
The
.Nm
driver provides support for the Non-Transparent Bridge (NTB) hardware in
PLX PCIe bridge chips, which allow up to two of their PCIe ports to be
switched from transparent to non-transparent bridge mode.
In this mode bridge looks not as a PCI bridge, but as PCI endpoint device.
The driver hides hardware details, exposing memory windows, scratchpads
and doorbells of the other side via hardware independent KPI to
.Xr ntb 4
subsystem.
.Pp
Each PLX NTB provides up to 2 64-bit or 4 32-bit memory windows to the
other system's memory, 6 or 12 scratchpad registers and 16 doorbells to
interrupt the other system.
In NTB-to-NTB mode one of memory windows (or half of it, if bigger then 1MB)
is consumed by the driver itself to access scratchpad and doorbell registers
of the other side.
.Sh HARDWARE
The following PLX/Avago/Broadcom chips are supported by the
.Nm
driver:
.Pp
.Bl -bullet -compact
.It
PEX 8713
.It
PEX 8717
.It
PEX 8725
.It
PEX 8733
.It
PEX 8749
.El
.Pp
, but it may also work with other compatible ones.
.Sh CONFIGURATION
The basic chip configuration should be done by serial EEPROM or via i2c.
It includes enabling NTB on one or both sides (choosing between NTB-to-NTB
(back-to-back) and NTB-to-Root Port modes) and configuring BARs sizes.
.Pp
The recommended mode is NTB-to-NTB mode, since while NTB-to-Root Port is
generally supported by the driver, it require PCI hotplug handling on the
Root Port, that may be difficult or cause different kinds of problems.
.Sh SEE ALSO
.Xr if_ntb 4 ,
.Xr ntb_transport 4 ,
.Xr ntb 4 ,
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Alexander Motin Aq Mt mav@FreeBSD.org .
.Sh BUGS
There is no way to protect your system from malicious behavior on the other
system once the link is brought up.
Anyone with root or kernel access on the other system can read or write to
any location on your system.
In other words, only connect two systems that completely trust each other.

35
share/man/man4/ntb_transport.4
View File

@ -1,5 +1,5 @@
.\"
.\" Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org>
.\" Copyright (c) 2016-2017 Alexander Motin <mav@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@ -25,14 +25,21 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 29, 2016
.Dd August 30, 2017
.Dt NTB_TRANSPORT 4
.Os
.Sh NAME
.Nm ntb_transport
.Nd Packet-oriented transport for Non-Transparent Bridges
.Sh SYNOPSIS
To load the driver as a module at boot, place the following line in
To compile this driver into your kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ntb"
.Cd "device ntb_transport"
.Ed
.Pp
Or, to load the driver as a module at boot, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
ntb_transport_load="YES"
@ -46,11 +53,11 @@ Driver debug level.
The default value is 0, higher means more verbose.
.It Va hint.ntb_transport. Ns Ar X Ns Va .config
Configures queues allocation for consumer devices, separated by commas.
Each device can be configured as: "<name>[:<queues>]", where:
Each device can be configured as: "[<name>][:<queues>]", where:
.Va name
is a name of the driver which should attach the device (empty means any),
.Va queues
is a number of queues to allocate (empty means automatic),
is a number of queues to allocate (empty means automatic).
The default configuration is empty string, which means single device
with one queue per memory window allowing any driver attachment.
.El
@ -64,9 +71,25 @@ delivering packets between the systems.
The primary purpose of this is to be used by
.Nm if_ntb
network interface, but other consumers may also be developed using KPI.
.Pp
Each
.Nm
require from underlying
.Nm ntb
instance:
.Bl -bullet -compact
.It
1 or more memory windows;
.It
6 scratchpads, plus 2 more for each additional memory window;
.It
1 doorbell for each memory window or configured queue.
.El
.Sh SEE ALSO
.Xr if_ntb 4 ,
.Xr ntb_hw 4
.Xr ntb 4 ,
.Xr ntb_hw_intel 4 ,
.Xr ntb_hw_plx 4
.Sh AUTHORS
.An -nosplit
The

11
sys/amd64/conf/NOTES
View File

@ -395,9 +395,14 @@ device iwn6000g2bfw
device iwn6050fw
device wpifw
# Intel Non-Transparent Bridge (NTB) hardware
device ntb_hw # Hardware Abstraction Layer for the NTB
device if_ntb # Simulated ethernet device using the NTB
#
# Non-Transparent Bridge (NTB) drivers
#
device if_ntb # Virtual NTB network interface
device ntb_transport # NTB packet transport driver
device ntb # NTB hardware interface
device ntb_hw_intel # Intel NTB hardware driver
device ntb_hw_plx # PLX NTB hardware driver
#
#XXX this stores pointers in a 32bit field that is defined by the hardware

9
sys/conf/files.amd64
View File

@ -330,10 +330,11 @@ dev/hyperv/vmbus/amd64/vmbus_vector.S optional hyperv
dev/nctgpio/nctgpio.c optional nctgpio
dev/nfe/if_nfe.c optional nfe pci
dev/ntb/if_ntb/if_ntb.c optional if_ntb
dev/ntb/ntb_transport.c optional if_ntb
dev/ntb/ntb.c optional if_ntb | ntb_hw
dev/ntb/ntb_if.m optional if_ntb | ntb_hw
dev/ntb/ntb_hw/ntb_hw.c optional ntb_hw
dev/ntb/ntb_transport.c optional ntb_transport | if_ntb
dev/ntb/ntb.c optional ntb | ntb_transport | if_ntb | ntb_hw_intel | ntb_hw_plx | ntb_hw
dev/ntb/ntb_if.m optional ntb | ntb_transport | if_ntb | ntb_hw_intel | ntb_hw_plx | ntb_hw
dev/ntb/ntb_hw/ntb_hw_intel.c optional ntb_hw_intel | ntb_hw
dev/ntb/ntb_hw/ntb_hw_plx.c optional ntb_hw_plx | ntb_hw
dev/nvd/nvd.c optional nvd nvme
dev/nvme/nvme.c optional nvme
dev/nvme/nvme_ctrlr.c optional nvme

9
sys/conf/files.i386
View File

@ -271,10 +271,11 @@ dev/mse/mse_isa.c optional mse isa
dev/nctgpio/nctgpio.c optional nctgpio
dev/nfe/if_nfe.c optional nfe pci
dev/ntb/if_ntb/if_ntb.c optional if_ntb
dev/ntb/ntb_transport.c optional if_ntb
dev/ntb/ntb.c optional if_ntb | ntb_hw
dev/ntb/ntb_if.m optional if_ntb | ntb_hw
dev/ntb/ntb_hw/ntb_hw.c optional ntb_hw
dev/ntb/ntb_transport.c optional ntb_transport | if_ntb
dev/ntb/ntb.c optional ntb | ntb_transport | if_ntb | ntb_hw_intel | ntb_hw_plx
dev/ntb/ntb_if.m optional ntb | ntb_transport | if_ntb | ntb_hw_intel | ntb_hw_plx
dev/ntb/ntb_hw/ntb_hw_intel.c optional ntb_hw_intel
dev/ntb/ntb_hw/ntb_hw_plx.c optional ntb_hw_plx
dev/nvd/nvd.c optional nvd nvme
dev/nvme/nvme.c optional nvme
dev/nvme/nvme_ctrlr.c optional nvme

8
sys/dev/ntb/ntb_hw/ntb_hw.c → sys/dev/ntb/ntb_hw/ntb_hw_intel.c
View File

@ -61,7 +61,7 @@ __FBSDID("$FreeBSD$");
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "ntb_regs.h"
#include "ntb_hw_intel.h"
#include "../ntb.h"
#define MAX_MSIX_INTERRUPTS MAX(XEON_DB_COUNT, ATOM_DB_COUNT)
@ -3116,6 +3116,6 @@ static device_method_t ntb_intel_methods[] = {
static DEFINE_CLASS_0(ntb_hw, ntb_intel_driver, ntb_intel_methods,
sizeof(struct ntb_softc));
DRIVER_MODULE(ntb_intel, pci, ntb_intel_driver, ntb_hw_devclass, NULL, NULL);
MODULE_DEPEND(ntb_intel, ntb, 1, 1, 1);
MODULE_VERSION(ntb_intel, 1);
DRIVER_MODULE(ntb_hw_intel, pci, ntb_intel_driver, ntb_hw_devclass, NULL, NULL);
MODULE_DEPEND(ntb_hw_intel, ntb, 1, 1, 1);
MODULE_VERSION(ntb_hw_intel, 1);

0
sys/dev/ntb/ntb_hw/ntb_regs.h → sys/dev/ntb/ntb_hw/ntb_hw_intel.h
View File

945
sys/dev/ntb/ntb_hw/ntb_hw_plx.c Normal file
View File

@ -0,0 +1,945 @@
/*-
* Copyright (c) 2017 Alexander Motin <mav@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* The Non-Transparent Bridge (NTB) is a device that allows you to connect
* two or more systems using a PCI-e links, providing remote memory access.
*
* This module contains a driver for NTBs in PLX/Avago/Broadcom PCIe bridges.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "../ntb.h"
#define PLX_MAX_BARS 4 /* There are at most 4 data BARs. */
#define PLX_NUM_SPAD 8 /* There are 8 scratchpads. */
#define PLX_NUM_SPAD_PATT 4 /* Use test pattern as 4 more. */
#define PLX_NUM_DB 16 /* There are 16 doorbells. */
struct ntb_plx_mw_info {
int mw_bar;
int mw_64bit;
int mw_rid;
struct resource *mw_res;
vm_paddr_t mw_pbase;
caddr_t mw_vbase;
vm_size_t mw_size;
vm_memattr_t mw_map_mode;
bus_addr_t mw_xlat_addr;
size_t mw_xlat_size;
};
struct ntb_plx_softc {
/* ntb.c context. Do not move! Must go first! */
void *ntb_store;
device_t dev;
struct resource *conf_res;
int conf_rid;
u_int ntx; /* NTx number within chip. */
u_int link; /* Link v/s Virtual side. */
u_int port; /* Port number within chip. */
int int_rid;
struct resource *int_res;
void *int_tag;
struct ntb_plx_mw_info mw_info[PLX_MAX_BARS];
int mw_count; /* Number of memory windows. */
int spad_count1; /* Number of standard spads. */
int spad_count2; /* Number of extra spads. */
uint32_t spad_off1; /* Offset of our spads. */
uint32_t spad_off2; /* Offset of our extra spads. */
uint32_t spad_offp1; /* Offset of peer spads. */
uint32_t spad_offp2; /* Offset of peer extra spads. */
/* Parameters of window shared with peer config access in B2B mode. */
int b2b_mw; /* Shared window number. */
uint64_t b2b_off; /* Offset in shared window. */
};
#define PLX_NT0_BASE 0x3E000
#define PLX_NT1_BASE 0x3C000
#define PLX_NTX_BASE(sc) ((sc)->ntx ? PLX_NT1_BASE : PLX_NT0_BASE)
#define PLX_NTX_LINK_OFFSET 0x01000
/* Bases of NTx our/peer interface registers */
#define PLX_NTX_OUR(sc) \
(PLX_NTX_BASE(sc) + ((sc)->link ? PLX_NTX_LINK_OFFSET : 0))
#define PLX_NTX_PEER(sc) \
(PLX_NTX_BASE(sc) + ((sc)->link ? 0 : PLX_NTX_LINK_OFFSET))
/* Read/write NTx our interface registers */
#define NTX_READ(sc, reg) \
bus_read_4((sc)->conf_res, PLX_NTX_OUR(sc) + (reg))
#define NTX_WRITE(sc, reg, val) \
bus_write_4((sc)->conf_res, PLX_NTX_OUR(sc) + (reg), (val))
/* Read/write NTx peer interface registers */
#define PNTX_READ(sc, reg) \
bus_read_4((sc)->conf_res, PLX_NTX_PEER(sc) + (reg))
#define PNTX_WRITE(sc, reg, val) \
bus_write_4((sc)->conf_res, PLX_NTX_PEER(sc) + (reg), (val))
/* Read/write B2B NTx registers */
#define BNTX_READ(sc, reg) \
bus_read_4((sc)->mw_info[(sc)->b2b_mw].mw_res, \
PLX_NTX_BASE(sc) + (reg))
#define BNTX_WRITE(sc, reg, val) \
bus_write_4((sc)->mw_info[(sc)->b2b_mw].mw_res, \
PLX_NTX_BASE(sc) + (reg), (val))
static int ntb_plx_init(device_t dev);
static int ntb_plx_detach(device_t dev);
static int ntb_plx_mw_set_trans_internal(device_t dev, unsigned mw_idx);
static int
ntb_plx_probe(device_t dev)
{
switch (pci_get_devid(dev)) {
case 0x87a010b5:
device_set_desc(dev, "PLX Non-Transparent Bridge NT0 Link");
return (BUS_PROBE_DEFAULT);
case 0x87a110b5:
device_set_desc(dev, "PLX Non-Transparent Bridge NT1 Link");
return (BUS_PROBE_DEFAULT);
case 0x87b010b5:
device_set_desc(dev, "PLX Non-Transparent Bridge NT0 Virtual");
return (BUS_PROBE_DEFAULT);
case 0x87b110b5:
device_set_desc(dev, "PLX Non-Transparent Bridge NT1 Virtual");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
ntb_plx_init(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
uint64_t val64;
int i;
uint32_t val;
if (sc->b2b_mw >= 0) {
/* Set peer BAR0/1 size and address for B2B NTx access. */
mw = &sc->mw_info[sc->b2b_mw];
if (mw->mw_64bit) {
PNTX_WRITE(sc, 0xe4, 0x3); /* 64-bit */
val64 = 0x2000000000000000 * mw->mw_bar | 0x4;
PNTX_WRITE(sc, PCIR_BAR(0), val64);
PNTX_WRITE(sc, PCIR_BAR(0) + 4, val64 >> 32);
} else {
PNTX_WRITE(sc, 0xe4, 0x2); /* 32-bit */
val = 0x20000000 * mw->mw_bar;
PNTX_WRITE(sc, PCIR_BAR(0), val);
}
/* Set Virtual to Link address translation for B2B. */
for (i = 0; i < sc->mw_count; i++) {
mw = &sc->mw_info[i];
if (mw->mw_64bit) {
val64 = 0x2000000000000000 * mw->mw_bar;
NTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4, val64);
NTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4 + 4, val64 >> 32);
} else {
val = 0x20000000 * mw->mw_bar;
NTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4, val);
}
}
/* Enable Link Interface LUT entry 0 for 0:0.0. */
PNTX_WRITE(sc, 0xdb4, 1);
}
/*
* Enable Virtual Interface LUT entry 0 for 0:0.0 and
* entry 1 for our Requester ID reported by chip.
*/
val = (NTX_READ(sc, 0xc90) << 16) | 0x00010001;
NTX_WRITE(sc, sc->link ? 0xdb4 : 0xd94, val);
/* Set Link to Virtual address translation. */
for (i = 0; i < sc->mw_count; i++) {
mw = &sc->mw_info[i];
if (mw->mw_xlat_size != 0)
ntb_plx_mw_set_trans_internal(dev, i);
}
pci_enable_busmaster(dev);
if (sc->b2b_mw >= 0)
PNTX_WRITE(sc, PCIR_COMMAND, PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
return (0);
}
static void
ntb_plx_isr(void *arg)
{
device_t dev = arg;
struct ntb_plx_softc *sc = device_get_softc(dev);
uint32_t val;
ntb_db_event((device_t)arg, 0);
val = NTX_READ(sc, 0xfe0);
if (val == 0)
return;
NTX_WRITE(sc, 0xfe0, val);
if (val & 1)
device_printf(dev, "Correctable Error\n");
if (val & 2)
device_printf(dev, "Uncorrectable Error\n");
if (val & 4) {
/* DL_Down resets link side registers, have to reinit. */
ntb_plx_init(dev);
ntb_link_event(dev);
}
if (val & 8)
device_printf(dev, "Uncorrectable Error Message Drop\n");
}
static int
ntb_plx_setup_intr(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
int error;
/*
* XXX: This hardware supports MSI, but I found it unusable.
* It generates new MSI only when doorbell register goes from
* zero, but does not generate it when another bit is set or on
* partial clear. It makes operation very racy and unreliable.
* The data book mentions some mask juggling magic to workaround
* that, but I failed to make it work.
*/
sc->int_rid = 0;
sc->int_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->int_rid, RF_SHAREABLE|RF_ACTIVE);
if (sc->int_res == NULL) {
device_printf(dev, "bus_alloc_resource failed\n");
return (ENOMEM);
}
error = bus_setup_intr(dev, sc->int_res, INTR_MPSAFE | INTR_TYPE_MISC,
NULL, ntb_plx_isr, dev, &sc->int_tag);
if (error != 0) {
device_printf(dev, "bus_setup_intr failed: %d\n", error);
return (error);
}
NTX_WRITE(sc, 0xfe0, 0xf); /* Clear link interrupts. */
NTX_WRITE(sc, 0xfe4, 0x0); /* Unmask link interrupts. */
return (0);
}
static void
ntb_plx_teardown_intr(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
NTX_WRITE(sc, 0xfe4, 0xf); /* Mask link interrupts. */
if (sc->int_res) {
bus_teardown_intr(dev, sc->int_res, sc->int_tag);
bus_release_resource(dev, SYS_RES_IRQ, sc->int_rid,
sc->int_res);
}
}
static int
ntb_plx_attach(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
int error = 0, i;
uint32_t val;
char buf[32];
/* Identify what we are (what side of what NTx). */
sc->dev = dev;
val = pci_read_config(dev, 0xc8c, 4);
sc->ntx = (val & 1) != 0;
sc->link = (val & 0x80000000) != 0;
/* Get access to whole 256KB of chip configuration space via BAR0/1. */
sc->conf_rid = PCIR_BAR(0);
sc->conf_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->conf_rid, RF_ACTIVE);
if (sc->conf_res == NULL) {
device_printf(dev, "Can't allocate configuration BAR.\n");
return (ENXIO);
}
pmap_change_attr((vm_offset_t)rman_get_start(sc->conf_res),
rman_get_size(sc->conf_res), VM_MEMATTR_UNCACHEABLE);
/* Identify chip port we are connected to. */
val = bus_read_4(sc->conf_res, 0x360);
sc->port = (val >> ((sc->ntx == 0) ? 8 : 16)) & 0x1f;
/* Find configured memory windows at BAR2-5. */
sc->mw_count = 0;
for (i = 2; i <= 5; i++) {
mw = &sc->mw_info[sc->mw_count];
mw->mw_bar = i;
mw->mw_rid = PCIR_BAR(mw->mw_bar);
mw->mw_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&mw->mw_rid, RF_ACTIVE);
if (mw->mw_res == NULL)
continue;
mw->mw_pbase = rman_get_start(mw->mw_res);
mw->mw_size = rman_get_size(mw->mw_res);
mw->mw_vbase = rman_get_virtual(mw->mw_res);
mw->mw_map_mode = VM_MEMATTR_UNCACHEABLE;
pmap_change_attr((vm_offset_t)mw->mw_vbase, mw->mw_size,
mw->mw_map_mode);
sc->mw_count++;
/* Skip over adjacent BAR for 64-bit BARs. */
val = pci_read_config(dev, PCIR_BAR(mw->mw_bar), 4);
if ((val & PCIM_BAR_MEM_TYPE) == PCIM_BAR_MEM_64) {
mw->mw_64bit = 1;
i++;
}
}
/* Try to identify B2B mode. */
i = 1;
snprintf(buf, sizeof(buf), "hint.%s.%d.b2b", device_get_name(dev),
device_get_unit(dev));
TUNABLE_INT_FETCH(buf, &i);
if (sc->link) {
device_printf(dev, "NTB-to-Root Port mode (Link Interface)\n");
sc->b2b_mw = -1;
} else if (i == 0) {
device_printf(dev, "NTB-to-Root Port mode (Virtual Interface)\n");
sc->b2b_mw = -1;
} else {
device_printf(dev, "NTB-to-NTB (back-to-back) mode\n");
/* We need at least one memory window for B2B peer access. */
if (sc->mw_count == 0) {
device_printf(dev, "No memory window BARs enabled.\n");
error = ENXIO;
goto out;
}
sc->b2b_mw = sc->mw_count - 1;
/* Use half of the window for B2B, but no less then 1MB. */
mw = &sc->mw_info[sc->b2b_mw];
if (mw->mw_size >= 2 * 1024 * 1024)
sc->b2b_off = mw->mw_size / 2;
else
sc->b2b_off = 0;
}
/*
* Use Physical Layer User Test Pattern as additional scratchpad.
* Make sure they are present and enabled by writing to them.
* XXX: Its a hack, but standard 8 registers are not enough.
*/
if (sc->b2b_mw >= 0) {
sc->spad_count1 = PLX_NUM_SPAD;
sc->spad_off1 = PLX_NTX_OUR(sc) + 0xc6c;
sc->spad_off2 = (sc->ntx == 0) ? 0x0020c : 0x0820c;
sc->spad_offp1 = sc->spad_off1;
sc->spad_offp2 = sc->spad_off2;
bus_write_4(sc->conf_res, sc->spad_off2, 0x12345678);
if (bus_read_4(sc->conf_res, sc->spad_off2) == 0x12345678)
sc->spad_count2 = PLX_NUM_SPAD_PATT;
} else {
sc->spad_count1 = PLX_NUM_SPAD / 2;
sc->spad_off1 = PLX_NTX_OUR(sc) + 0xc6c;
sc->spad_off2 = (sc->ntx == 0) ? 0x0020c : 0x0820c;
sc->spad_offp1 = sc->spad_off1;
sc->spad_offp2 = sc->spad_off2;
if (sc->link) {
sc->spad_off1 += PLX_NUM_SPAD / 2 * 4;
sc->spad_off2 += PLX_NUM_SPAD_PATT / 2 * 4;
} else {
sc->spad_offp1 += PLX_NUM_SPAD / 2 * 4;
sc->spad_offp2 += PLX_NUM_SPAD_PATT / 2 * 4;
}
bus_write_4(sc->conf_res, sc->spad_off2, 0x12345678);
if (bus_read_4(sc->conf_res, sc->spad_off2) == 0x12345678)
sc->spad_count2 = PLX_NUM_SPAD_PATT / 2;
}
/* Apply static part of NTB configuration. */
ntb_plx_init(dev);
/* Allocate and setup interrupts. */
error = ntb_plx_setup_intr(dev);
if (error)
goto out;
/* Attach children to this controller */
error = ntb_register_device(dev);
out:
if (error != 0)
ntb_plx_detach(dev);
return (error);
}
static int
ntb_plx_detach(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
int i;
/* Detach & delete all children */
ntb_unregister_device(dev);
/* Disable and free interrupts. */
ntb_plx_teardown_intr(dev);
/* Free memory resources. */
for (i = 0; i < sc->mw_count; i++) {
mw = &sc->mw_info[i];
bus_release_resource(dev, SYS_RES_MEMORY, mw->mw_rid,
mw->mw_res);
}
bus_release_resource(dev, SYS_RES_MEMORY, sc->conf_rid, sc->conf_res);
return (0);
}
static bool
ntb_plx_link_is_up(device_t dev, enum ntb_speed *speed, enum ntb_width *width)
{
uint16_t link;
link = pcie_read_config(dev, PCIER_LINK_STA, 2);
if (speed != NULL)
*speed = (link & PCIEM_LINK_STA_SPEED);
if (width != NULL)
*width = (link & PCIEM_LINK_STA_WIDTH) >> 4;
return ((link & PCIEM_LINK_STA_WIDTH) != 0);
}
static int
ntb_plx_link_enable(device_t dev, enum ntb_speed speed __unused,
enum ntb_width width __unused)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
uint32_t reg, val;
/* The fact that we see the Link Interface means link is enabled. */
if (sc->link) {
ntb_link_event(dev);
return (0);
}
reg = (sc->port < 8) ? 0x00208 : 0x08208;
val = bus_read_4(sc->conf_res, reg);
if ((val & (1 << (sc->port & 7))) == 0) {
/* If already enabled, generate fake link event and exit. */
ntb_link_event(dev);
return (0);
}
val &= ~(1 << (sc->port & 7));
bus_write_4(sc->conf_res, reg, val);
return (0);
}
static int
ntb_plx_link_disable(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
uint32_t reg, val;
/* Link disable for Link Interface would be suicidal. */
if (sc->link)
return (0);
reg = (sc->port < 8) ? 0x00208 : 0x08208;
val = bus_read_4(sc->conf_res, reg);
val |= (1 << (sc->port & 7));
bus_write_4(sc->conf_res, reg, val);
return (0);
}
static bool
ntb_plx_link_enabled(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
uint32_t reg, val;
/* The fact that we see the Link Interface means link is enabled. */
if (sc->link)
return (TRUE);
reg = (sc->port < 8) ? 0x00208 : 0x08208;
val = bus_read_4(sc->conf_res, reg);
return ((val & (1 << (sc->port & 7))) == 0);
}
static uint8_t
ntb_plx_mw_count(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
if (sc->b2b_mw >= 0 && sc->b2b_off == 0)
return (sc->mw_count - 1); /* B2B consumed whole window. */
return (sc->mw_count);
}
static int
ntb_plx_mw_get_range(device_t dev, unsigned mw_idx, vm_paddr_t *base,
caddr_t *vbase, size_t *size, size_t *align, size_t *align_size,
bus_addr_t *plimit)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
size_t off;
if (mw_idx >= sc->mw_count)
return (EINVAL);
off = 0;
if (mw_idx == sc->b2b_mw) {
KASSERT(sc->b2b_off != 0,
("user shouldn't get non-shared b2b mw"));
off = sc->b2b_off;
}
mw = &sc->mw_info[mw_idx];
/* Local to remote memory window parameters. */
if (base != NULL)
*base = mw->mw_pbase + off;
if (vbase != NULL)
*vbase = mw->mw_vbase + off;
if (size != NULL)
*size = mw->mw_size - off;
/*
* Remote to local memory window translation address alignment.
* XXX: In B2B mode we can change window size (and so alignmet)
* live, but there is no way to report it, so report safe value.
*/
if (align != NULL)
*align = mw->mw_size - off;
/*
* Remote to local memory window size alignment.
* XXX: The chip has no limit registers. In B2B case size must be
* power of 2 (since we can reprogram BAR size), but there is no way
* to report it, so report 1MB -- minimal BAR size. In non-B2B case
* there is no control at all, so report the precofigured BAR size.
*/
if (align_size != NULL) {
if (sc->b2b_mw >= 0)
*align_size = 1024 * 1024;
else
*align_size = mw->mw_size - off;
}
/* Remote to local memory window translation address upper limit. */
if (plimit != NULL)
*plimit = mw->mw_64bit ? BUS_SPACE_MAXADDR :
BUS_SPACE_MAXADDR_32BIT;
return (0);
}
static int
ntb_plx_mw_set_trans_internal(device_t dev, unsigned mw_idx)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
uint64_t addr, off, size, val64;
uint32_t val;
mw = &sc->mw_info[mw_idx];
addr = mw->mw_xlat_addr;
size = mw->mw_xlat_size;
off = 0;
if (mw_idx == sc->b2b_mw) {
off = sc->b2b_off;
KASSERT(off != 0, ("user shouldn't get non-shared b2b mw"));
/*
* While generally we can set any BAR size on link side,
* for B2B shared window we can't go above preconfigured
* size due to BAR address alignment requirements.
*/
if (size > mw->mw_size - off)
return (EINVAL);
}
if (size > 0) {
/* Round BAR size to next power of 2 or at least 1MB. */
if (!powerof2(size))
size = 1LL << flsll(size);
if (size < 1024 * 1024)
size = 1024 * 1024;
/* Hardware requires addr aligned to BAR size. */
if ((addr & (size - 1)) != 0)
return (EINVAL);
}
if (mw->mw_64bit) {
if (sc->b2b_mw >= 0) {
/* Set Link Interface BAR size and enable/disable it. */
val64 = 0;
if (size > 0)
val64 = (~(size - 1) & ~0xfffff);
val64 |= 0x4;
PNTX_WRITE(sc, 0xe8 + (mw->mw_bar - 2) * 4, val64);
PNTX_WRITE(sc, 0xe8 + (mw->mw_bar - 2) * 4 + 4, val64 >> 32);
/* Set Link Interface BAR address. */
val64 = 0x2000000000000000 * mw->mw_bar + off;
val64 |= 0x4;
PNTX_WRITE(sc, PCIR_BAR(mw->mw_bar), val64);
PNTX_WRITE(sc, PCIR_BAR(mw->mw_bar) + 4, val64 >> 32);
}
/* Set Virtual Interface BARs address translation */
PNTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4, addr);
PNTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4 + 4, addr >> 32);
} else {
/* Make sure we fit into 32-bit address space. */
if ((addr & UINT32_MAX) != addr)
return (ERANGE);
if (((addr + size) & UINT32_MAX) != (addr + size))
return (ERANGE);
if (sc->b2b_mw >= 0) {
/* Set Link Interface BAR size and enable/disable it. */
val = 0;
if (size > 0)
val = (~(size - 1) & ~0xfffff);
PNTX_WRITE(sc, 0xe8 + (mw->mw_bar - 2) * 4, val);
/* Set Link Interface BAR address. */
val64 = 0x20000000 * mw->mw_bar + off;
PNTX_WRITE(sc, PCIR_BAR(mw->mw_bar), val64);
}
/* Set Virtual Interface BARs address translation */
PNTX_WRITE(sc, 0xc3c + (mw->mw_bar - 2) * 4, addr);
}
return (0);
}
static int
ntb_plx_mw_set_trans(device_t dev, unsigned mw_idx, bus_addr_t addr, size_t size)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
if (mw_idx >= sc->mw_count)
return (EINVAL);
mw = &sc->mw_info[mw_idx];
mw->mw_xlat_addr = addr;
mw->mw_xlat_size = size;
return (ntb_plx_mw_set_trans_internal(dev, mw_idx));
}
static int
ntb_plx_mw_clear_trans(device_t dev, unsigned mw_idx)
{
return (ntb_plx_mw_set_trans(dev, mw_idx, 0, 0));
}
static int
ntb_plx_mw_get_wc(device_t dev, unsigned idx, vm_memattr_t *mode)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
if (idx >= sc->mw_count)
return (EINVAL);
mw = &sc->mw_info[idx];
*mode = mw->mw_map_mode;
return (0);
}
static int
ntb_plx_mw_set_wc(device_t dev, unsigned idx, vm_memattr_t mode)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
uint64_t off;
int rc;
if (idx >= sc->mw_count)
return (EINVAL);
mw = &sc->mw_info[idx];
if (mw->mw_map_mode == mode)
return (0);
off = 0;
if (idx == sc->b2b_mw) {
KASSERT(sc->b2b_off != 0,
("user shouldn't get non-shared b2b mw"));
off = sc->b2b_off;
}
rc = pmap_change_attr((vm_offset_t)mw->mw_vbase + off,
mw->mw_size - off, mode);
if (rc == 0)
mw->mw_map_mode = mode;
return (rc);
}
static uint8_t
ntb_plx_spad_count(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
return (sc->spad_count1 + sc->spad_count2);
}
static int
ntb_plx_spad_write(device_t dev, unsigned int idx, uint32_t val)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
u_int off;
if (idx >= sc->spad_count1 + sc->spad_count2)
return (EINVAL);
if (idx < sc->spad_count1)
off = sc->spad_off1 + idx * 4;
else
off = sc->spad_off2 + (idx - sc->spad_count1) * 4;
bus_write_4(sc->conf_res, off, val);
return (0);
}
static void
ntb_plx_spad_clear(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->spad_count1 + sc->spad_count2; i++)
ntb_plx_spad_write(dev, i, 0);
}
static int
ntb_plx_spad_read(device_t dev, unsigned int idx, uint32_t *val)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
u_int off;
if (idx >= sc->spad_count1 + sc->spad_count2)
return (EINVAL);
if (idx < sc->spad_count1)
off = sc->spad_off1 + idx * 4;
else
off = sc->spad_off2 + (idx - sc->spad_count1) * 4;
*val = bus_read_4(sc->conf_res, off);
return (0);
}
static int
ntb_plx_peer_spad_write(device_t dev, unsigned int idx, uint32_t val)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
u_int off;
if (idx >= sc->spad_count1 + sc->spad_count2)
return (EINVAL);
if (idx < sc->spad_count1)
off = sc->spad_offp1 + idx * 4;
else
off = sc->spad_offp2 + (idx - sc->spad_count1) * 4;
if (sc->b2b_mw >= 0)
bus_write_4(sc->mw_info[sc->b2b_mw].mw_res, off, val);
else
bus_write_4(sc->conf_res, off, val);
return (0);
}
static int
ntb_plx_peer_spad_read(device_t dev, unsigned int idx, uint32_t *val)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
u_int off;
if (idx >= sc->spad_count1 + sc->spad_count2)
return (EINVAL);
if (idx < sc->spad_count1)
off = sc->spad_offp1 + idx * 4;
else
off = sc->spad_offp2 + (idx - sc->spad_count1) * 4;
if (sc->b2b_mw >= 0)
*val = bus_read_4(sc->mw_info[sc->b2b_mw].mw_res, off);
else
*val = bus_read_4(sc->conf_res, off);
return (0);
}
static uint64_t
ntb_plx_db_valid_mask(device_t dev)
{
return ((1LL << PLX_NUM_DB) - 1);
}
static int
ntb_plx_db_vector_count(device_t dev)
{
return (1);
}
static uint64_t
ntb_plx_db_vector_mask(device_t dev, uint32_t vector)
{
if (vector > 0)
return (0);
return ((1LL << PLX_NUM_DB) - 1);
}
static void
ntb_plx_db_clear(device_t dev, uint64_t bits)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
NTX_WRITE(sc, sc->link ? 0xc60 : 0xc50, bits);
}
static void
ntb_plx_db_clear_mask(device_t dev, uint64_t bits)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
NTX_WRITE(sc, sc->link ? 0xc68 : 0xc58, bits);
}
static uint64_t
ntb_plx_db_read(device_t dev)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
return (NTX_READ(sc, sc->link ? 0xc5c : 0xc4c));
}
static void
ntb_plx_db_set_mask(device_t dev, uint64_t bits)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
NTX_WRITE(sc, sc->link ? 0xc64 : 0xc54, bits);
}
static int
ntb_plx_peer_db_addr(device_t dev, bus_addr_t *db_addr, vm_size_t *db_size)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
struct ntb_plx_mw_info *mw;
KASSERT((db_addr != NULL && db_size != NULL), ("must be non-NULL"));
if (sc->b2b_mw >= 0) {
mw = &sc->mw_info[sc->b2b_mw];
*db_addr = (uint64_t)mw->mw_pbase + PLX_NTX_BASE(sc) + 0xc4c;
} else {
*db_addr = rman_get_start(sc->conf_res) + PLX_NTX_BASE(sc);
*db_addr += sc->link ? 0xc4c : 0xc5c;
}
*db_size = 4;
return (0);
}
static void
ntb_plx_peer_db_set(device_t dev, uint64_t bit)
{
struct ntb_plx_softc *sc = device_get_softc(dev);
if (sc->b2b_mw >= 0)
BNTX_WRITE(sc, 0xc4c, bit);
else
NTX_WRITE(sc, sc->link ? 0xc4c : 0xc5c, bit);
}
static device_method_t ntb_plx_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ntb_plx_probe),
DEVMETHOD(device_attach, ntb_plx_attach),
DEVMETHOD(device_detach, ntb_plx_detach),
/* NTB interface */
DEVMETHOD(ntb_link_is_up, ntb_plx_link_is_up),
DEVMETHOD(ntb_link_enable, ntb_plx_link_enable),
DEVMETHOD(ntb_link_disable, ntb_plx_link_disable),
DEVMETHOD(ntb_link_enabled, ntb_plx_link_enabled),
DEVMETHOD(ntb_mw_count, ntb_plx_mw_count),
DEVMETHOD(ntb_mw_get_range, ntb_plx_mw_get_range),
DEVMETHOD(ntb_mw_set_trans, ntb_plx_mw_set_trans),
DEVMETHOD(ntb_mw_clear_trans, ntb_plx_mw_clear_trans),
DEVMETHOD(ntb_mw_get_wc, ntb_plx_mw_get_wc),
DEVMETHOD(ntb_mw_set_wc, ntb_plx_mw_set_wc),
DEVMETHOD(ntb_spad_count, ntb_plx_spad_count),
DEVMETHOD(ntb_spad_clear, ntb_plx_spad_clear),
DEVMETHOD(ntb_spad_write, ntb_plx_spad_write),
DEVMETHOD(ntb_spad_read, ntb_plx_spad_read),
DEVMETHOD(ntb_peer_spad_write, ntb_plx_peer_spad_write),
DEVMETHOD(ntb_peer_spad_read, ntb_plx_peer_spad_read),
DEVMETHOD(ntb_db_valid_mask, ntb_plx_db_valid_mask),
DEVMETHOD(ntb_db_vector_count, ntb_plx_db_vector_count),
DEVMETHOD(ntb_db_vector_mask, ntb_plx_db_vector_mask),
DEVMETHOD(ntb_db_clear, ntb_plx_db_clear),
DEVMETHOD(ntb_db_clear_mask, ntb_plx_db_clear_mask),
DEVMETHOD(ntb_db_read, ntb_plx_db_read),
DEVMETHOD(ntb_db_set_mask, ntb_plx_db_set_mask),
DEVMETHOD(ntb_peer_db_addr, ntb_plx_peer_db_addr),
DEVMETHOD(ntb_peer_db_set, ntb_plx_peer_db_set),
DEVMETHOD_END
};
static DEFINE_CLASS_0(ntb_hw, ntb_plx_driver, ntb_plx_methods,
sizeof(struct ntb_plx_softc));
DRIVER_MODULE(ntb_hw_plx, pci, ntb_plx_driver, ntb_hw_devclass, NULL, NULL);
MODULE_DEPEND(ntb_hw_plx, ntb, 1, 1, 1);
MODULE_VERSION(ntb_hw_plx, 1);

9
sys/i386/conf/NOTES
View File

@ -657,6 +657,15 @@ device iwn6000g2bfw
device iwn6050fw
device wpifw
#
# Non-Transparent Bridge (NTB) drivers
#
device if_ntb # Virtual NTB network interface
device ntb_transport # NTB packet transport driver
device ntb # NTB hardware interface
device ntb_hw_intel # Intel NTB hardware driver
device ntb_hw_plx # PLX NTB hardware driver
#
# ATA raid adapters
#

2
sys/modules/ntb/Makefile
View File

@ -1,5 +1,5 @@
# $FreeBSD$
SUBDIR= ntb ntb_hw ntb_transport if_ntb
SUBDIR= ntb ntb_hw_intel ntb_hw_plx ntb_transport if_ntb
.include <bsd.subdir.mk>

9
sys/modules/ntb/ntb_hw_intel/Makefile Normal file
View File

@ -0,0 +1,9 @@
# $FreeBSD$
.PATH: ${SRCTOP}/sys/dev/ntb/ntb_hw
KMOD = ntb_hw_intel
SRCS = ntb_hw_intel.c
SRCS += device_if.h bus_if.h pci_if.h ntb_if.h
.include <bsd.kmod.mk>

4
sys/modules/ntb/ntb_hw/Makefile → sys/modules/ntb/ntb_hw_plx/Makefile
View File

@ -2,8 +2,8 @@
.PATH: ${SRCTOP}/sys/dev/ntb/ntb_hw
KMOD = ntb_hw
SRCS = ntb_hw.c
KMOD = ntb_hw_plx
SRCS = ntb_hw_plx.c
SRCS += device_if.h bus_if.h pci_if.h ntb_if.h
.include <bsd.kmod.mk>