Ashok Raj [Wed, 18 Oct 2023 21:34:15 +0000 (14:34 -0700)]
Subject: lspci: Display PASID required attribute in Page Status Register.
Display the PASID required attribute in the Page Request Status Register.
When set, the function expects a PASID on Page Group Response (PRG)
messages when the corresponding page request had a PASID.
Decode the PCIe DevCtl2 End-to-End TLP Prefix Blocking bit. The
"EETLPPrefixBlk" format is analogous to the existing "EETLPPrefix" format
used for the corresponding DevCap2 bit.
Martin Mares [Sat, 22 Jul 2023 21:47:13 +0000 (23:47 +0200)]
update-pciids: Re-compress pci.ids if needed
Previously, if pciutils were configured with compression of pci.ids,
update-pciids downloaded the gzipped version. Now, it downloads the
most compressed version for which tools are found installed, and
recompresses it to gzip if needed.
David Edmondson [Wed, 19 Jul 2023 14:16:41 +0000 (15:16 +0100)]
lspci: Use mangled vendor/device ID when examining vendor caps
Given that PCI VFs are expected to have a vendor and device ID of
0xffff, when examining vendor capabilities use the mangled vendor and
device IDs (typically copied from the PF) rather than those read from
the VF configuration space.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
The error bit is specified by the 2nd (zero indexed) bit
in the status register, so the respective bit value is 4 (PCI Base Spec
6.0.1). Let's fix that up.
ls-tree: Fix parsing devices on multidomain PCI system
Represent each domain as domain bridge under the &host_bridge and put root
bus of each domain under the domain bridge.
With this change lspci in tree view does not show zero bus on domain 0 in
the output if this bus does not exist at all. Root bus in PCIe hierarchy
does not have to be zero and on Freescale PowerPC systems it is common.
Also with this change are separate domain showed in the output separately.
ls-tree: Do not read Primary Bus Number for PCI Bridges from PCI config space
For PCIe devices of PCI Bridge type is Primary Bus Number not used and the
default value is 0. PCIe devices capture their Bus and Device numbers
automatically from PCIe TLP packets.
Instead of Primary Bus Number use Device Number because zero value confuse
tree building algorithm. Existing code already expects that Device Number
of PCI Bridge is already set to Primary Bus Number.
Martin Mares [Sun, 5 Mar 2023 13:56:52 +0000 (14:56 +0100)]
Parameters: Keep the list sorted and remove duplicates
When multiple back-ends use the same option (e.g., "devmem.path"),
they tend to define it each. This is not nice, but before we generalize
these options properly, let us at least remove the duplicate definitions.
Pali Rohár [Sun, 29 Jan 2023 23:39:36 +0000 (00:39 +0100)]
libpci: Add PCIe ECAM access method
This is a new direct hardware access method via PCIe ECAM (Enhanced
Configuration Access Mechanism). It is available on all PCIe-compliant
hardware. Requires root privileges and access to physical memory.
ECAM mapping can be specified manually via a new ecam.addrs parameter or
can be read from ACPI MCFG table. ACPI MCFG table can be located in the
system or read from x86 BIOS memory.
Martin Mares [Sat, 4 Mar 2023 15:33:09 +0000 (16:33 +0100)]
Use "command -v" instead of "which"
Apparently, people started considering "which" obsolete. I still
consider "which" rather useful and definitely more comfortable to type
than "command -v".
Still, "command -v" should be more portable, so let us use it.
I wonder which of the ancient systems which we are still supporting
will be broken by this change...
Pali Rohár [Sun, 29 Jan 2023 22:49:06 +0000 (23:49 +0100)]
libpci: mmio-ports: Fix support for 64-bit non-LLP64 systems
On 64-bit non-LLP64 systems is type long 64-bit. On 32-bit and 64-bit LLP64
systems is type long only 32-bit. But readl() and writel() functions works
with 32-bit PCI word. Fix it for non-LLP64 systems by using type u32.
Pali Rohár [Fri, 30 Dec 2022 20:21:10 +0000 (21:21 +0100)]
libpci: win32-cfgmgr32: Add support for accessing config space via other backend
Extend win32-cfgmgr32 backend and add a new option win32.cfgmethod for
specifying other backend for accessing PCI config space. There are more
config space access methods available on Windows and each is working only
sometimes (either requires special privileges or special setup).
So by default try to choose the first working one via order defined in pci
probe_sequence[] array. If none is available then emulate PCI config space
like before this change.
Function pci_init_v35() is extended and renamed to pci_init_internal() to
optionally do not throw errors and allow to specify one access method which
will be skipped in AUTO mode. This is used to prevent choosing win32-cfgmgr32
as config space access method for win32-cfgmgr32.
Pali Rohár [Fri, 18 Nov 2022 22:40:39 +0000 (23:40 +0100)]
libpci: windows: Handle long paths generated by GetModuleFileName()
C function fopen() implemented by msvcrt.dll requires special prefix
"\\\\?\\" for paths longer than 260 bytes. Because GetModuleFileName()
returns absolute path, it may be longer than 260 bytes. Add fixup to handle
long paths.
Pali Rohár [Fri, 18 Nov 2022 20:57:50 +0000 (21:57 +0100)]
libpci: djgpp: Allow to specify empty IDSDIR=
Like for windows builds this will cause to load pci.ids file from the same
directory where is stored application binary. Code is same as for Windows,
just djgpp uses global symbol __dos_argv0 instead of _pgmptr.
Tested with following compile command:
make CROSS_COMPILE=i586-pc-msdosdjgpp- HOST=i586-djgpp ZLIB=no DNS=no IDSDIR=
Pali Rohár [Fri, 18 Nov 2022 20:54:53 +0000 (21:54 +0100)]
libpci: windows: Fix locating path to pci.ids file for DLL builds
When using shared libpci DLL library, it is expected that pci.ids file is
stored in directory where is also libpci DLL library and not in directory
where is application executable.
Based on the build mode and compile options, choose the appropriate
function for retrieving path to the libpci DLL library or application
executable. Also pass correct module argument to GetModuleFileName() call.
Pali Rohár [Fri, 18 Nov 2022 20:47:04 +0000 (21:47 +0100)]
libpci: windows: Fix usage of GetModuleFileName()
Module file name can have arbitrary length despite all MS examples say
about MAX_PATH upper limit. This limit does not apply for example when
executable is running from network disk with very long UNC paths or
when using "\\??\\" prefix for specifying executable binary path.
So handle buffer truncatenation by retrying GetModuleFileName() call with
larger buffer.
Fixes loading of pci.ids file when lspci.exe binary is running from network
drive with path longer than 260 bytes.
Pali Rohár [Sun, 2 Jan 2022 19:50:41 +0000 (20:50 +0100)]
libpci: mmio-ports: Add Extended PCIe Intel Type 1 access method
Extended method allows to access all PCIe registers, including extended
registers starting at 0x100 offset. This method uses 4 reserved buts above
bus bits for PCIe registers. On ARM platforms it is very common for PCIe
controllers. Like standard method, it needs to be properly configured.
Pali Rohár [Fri, 4 Mar 2022 00:07:53 +0000 (01:07 +0100)]
libpci: Add new windows kldbgdrv.sys implementation
Microsoft Kernel Local Debugging Driver (kldbgdrv.sys) allow access for
userspace processes to the PCI config space. It supports access up to
65536 domains and whole 4096 bytes long extended PCIe config space. Driver
is signed by Microsoft and is available for both 32-bit and 64-bit systems.
Driver is not part of Windows system and has to be installed via WinDbg
installation package. Standalone installers for WinDbg 6.12.2.633 version:
https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_amd64/dbg_amd64.msi
https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools/dbg_x86.msi
This kldbgdrv.sys API is used by the !pci command of new WinDbg kernel
debugger for displaying PCI config space.
API of this driver is available only for processes with Debug privilege and
only if system was booted with Debugging option.
Pali Rohár [Sun, 6 Nov 2022 17:57:39 +0000 (18:57 +0100)]
i386-ports: Fix intel_io_lock usage
Do not call pci_generic_block_read() and pci_generic_block_write()
functions when io is locked. These functions call back same backend
read/write function which tries to lock and unlock io again.
Pali Rohár [Sun, 6 Nov 2022 12:58:55 +0000 (13:58 +0100)]
i386-io-linux: Prefer usage of ioperm()
Since Linux 2.6.8, it is possible to use ioperm() syscall to gain access
for all I/O ports. Because iopl() syscall before Linux 5.5 allowed
userspace to disable interrupts, prefer usage of ioperm() syscall and ask
for access only for PCI ports.
Pali Rohár [Sun, 2 Jan 2022 19:50:41 +0000 (20:50 +0100)]
libpci: Add Intel Type 1 implementation for memory mapped systems
Lot of non-x86 platforms also support Intel Type 1 mechanism. x86 IO ports
CF8 and CFC are on these platforms mapped into standard memory space.
Address mapping itself is platform or board specific and there is no
default value.
Lot of ARM boards with multiple PCIe controllers are multi-domain and each
PCI domain has its own CF8/CFC (address/data) registers mapped into memory
space.
Add new mmio-conf1 backend which access CF8/CFC ports via MMIO and define
new config option mmio-conf1.addrs which specify list of address/data
register pairs in memory space for each PCI domain. Format of this option
is: 0xaddr1/0xdata1,0xaddr2/0xdata2,...
Jaxon Haws [Mon, 31 Oct 2022 21:57:43 +0000 (16:57 -0500)]
cxl: Fix Register Locator DVSEC decoding
Fix decoding of register blocks by introducing offset to position
calculation (8.1.9 of CXL 3.0 spec) and removed unused defines for
Register Locator DVSEC.
Show error message from intel_setup_io() function into debug area instead
of error area. This is what other backends do as intel_setup_io() is called
during quite detect phase, which may fail.
Also show human readable failure instead of magic code number.
Pali Rohár [Sun, 8 May 2022 12:31:11 +0000 (14:31 +0200)]
libpci: Put name and version information into DLL library
Generate rc file from in template and fill DLL name and DLL version from
Makefile.
It looks like that the only possible way via GNU tools to specify version
information for DLL library is via text rc file compiled as COFF object
file via GNU windres and linked into the final DLL library via GNU ld.
Pali Rohár [Sun, 8 May 2022 08:52:35 +0000 (10:52 +0200)]
libpci: Do not call unversioned symbols from libpci itself
Windows version of GNU LD has bugs which cause that linker would translate
this unknown unversioned symbols to some random version.
So change pci_fill_info() to pci_fill_info_v38() in lib/filter.c to ensure
that last version of this function would be used also by Windows version of
GNU LD linker.
Before this change GNU LD translated this function call to symbol
_pci_fill_info@LIBPCI_3.0. After this change GNU LD translate it to
_pci_fill_info@LIBPCI_3.8.
Pali Rohár [Sun, 8 May 2022 08:25:59 +0000 (10:25 +0200)]
libpci: Add support for building versioned shared Windows DLL library libpci3.dll
PE/COFF format, used by DLL libraries, does not support version symbols
like ELF format. Recommendation from Microsoft for DLL symbol versioning is
to use DLL API sets. But DLL API sets scheme requires for every API change
to generated a new slim forwarding DLL library, which is unsuitable for
distribution which wants just one DLL library with all version symbols.
So instead of Microsoft recommended scheme for DLL versioning, use new
different versioning scheme: Symbol is composed by function name, at (@)
character and version string (version is same as for ELF targets). Symbol
name without version information is added only into the DLL DEF file as
alias to symbol with higest version. So linker at application link time
resolves "unversioned" symbol to the versioned one via this alias and puts
"versioned" symbol into final executable. This works fine if GNU LD is
linking application via import library libpci3.dll.a generated from that
DLL DEF file libpci3.def. But does not work when linking directly to the
DLL library because library itself does not contain aliases. Note that GNU
LD does not support linking to DEF file (it is required to first generated
import library from DEF file).
Note that older GNU LD versions have bug which cause generation of
corrupted DLL files if some symbol contains dot (.) character. Hopefully
this bug was fixed in GNU LD 2.21.
At the end application lspci.exe requires library libpci3.dll with symbols
pci_alloc@LIBPCI_3.0, pci_init@LIBPCI_3.5, pci_fill_info@LIBPCI_3.8 and
therefore libpci3.dll stays backward compatible with future changes.
PE/COFF executables can reference symbols either via name or via its
ordinal number. Because DLL DEF files are generated from libpci version
script and generator ver2def.pl preserves order of symbols, it means that
ordinal numbers stay backward compatible unless order of lines in version
script is changed.
WARNINGS:
GCC an GNU LD for Windows target have some bugs which cause that
-fvisibility=hidden switch and __attribute__((visibility("default"))) does
not work. Seems that they are broken and ignored when building DLL library.
So instead use -Wl,--exclude-all-symbols switch with explicit DLL DEF file
for building DLL library, which seems to work. This switch is supported
since GNU LD 2.21.
GNU LD has also another bug which results in broken DLL library if input
DLL DEF file which describes symbols for exports, contains also symbol
aliases via == operator.
So do not specify symbol aliases in input DLL DEF file for building DLL
library. Instead construct separate DLL DEF file for building libpci3.dll
without symbol aliases and separate DLL DEF file libpci3.def with symbol
aliases for building import library libpci3.dll.a suitable for linking into
target applications. Note that operator == for symbol aliases is supported
since GNU dlltool 2.21.
Generate those two DLL DEF files via new script ver2def.pl from libpci.ver
version script. So exported functions and version symbols would be defined
only at one place in file libpci.ver.
Note that GNU LD for Windows targets has also broken support for version
scripts, it exports nonsense data and completely ignores version
information. So always use only DLL DEF files generated by ver2def.pl
script and never pass original version script to GNU LD.
Due to another bugs in GNU dlltool, ordinals for aliased symbols from DLL
DEF file are calculated incorrectly when building import library. So
calculate ordinals manually in ver2def.pl script and explicitly put then
into generated libpci3.def DLL DEF file for every symbol, including
aliases.
And because aliases are stored only in libpci3.def file (and in import
library libpci3.dll.a generated from that DEF file) and not in DLL library
libpci3.dll itself, it is required to link all libpci applications via
import library and not directly to libpci3.dll. This is limitation of
PE/COFF format used by DLL libraries.
So for building Windows DLL library libpci3.dll is needed to use GNU
binutils 2.21 or new.
Pali Rohár [Thu, 16 Jun 2022 14:14:56 +0000 (16:14 +0200)]
setpci: Check if standard register on device exist
Some standard registers are available only on device with header type 0,
some only on header type 1, some other only on header type 2 and some on
header type 0 and 1. Add definitions which registers are available on which
header type and add check to access only available registers.