Reporting a completion via usb_complete() will pass control outside
the scope of xhci.c, and could potentially result in a further call to
xhci_event_poll() before returning from usb_complete(). Since we
currently update the event consumer counter only after calling
usb_complete(), this can result in duplicate completions and
consequent corruption of the submission TRB ring structures.
Fix by updating the event ring consumer counter before passing control
to usb_complete().
Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The i219 appears to have a seriously broken reset mechanism. After
any transmit or receive activity, resetting the card will break both
the transmit and receive datapaths until the next PCI bus reset.
The Linux and BSD drivers include a convoluted workaround authored by
Intel which involves setting a bit in the undocumented FEXTNVM11
register, then transmitting a dummy 512-byte packet containing garbage
data, then reconfiguring the receive descriptor prefetch thresholds
and temporarily reenabling the receive datapath. The comments in the
Intel fix do not even remotely match what the code actually does, and
the code accidentally leaves the transmitter enabled after use.
Experimentation suggests that an equivalent fix is to simply set the
undocumented bit in FEXTNVM11 before enabling the transmit or receive
descriptor rings.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Invalid protocol speed ID tables appear to be increasingly common in
the wild, to the point that it is infeasible to apply an explicit
XHCI_BAD_PSIV flag for each offending PCI device ID.
Fix by assuming an invalid PSI table as soon as any invalid value is
reported by the hardware.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some older versions of gcc (observed with gcc 4.7.2) report a spurious
uninitialised variable warning in ena_get_device_attributes(). Work
around this warning by manually inlining the relevant code (which has
only a single call site).
Reported-by: xbgmsharp <xbgmsharp@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Most drivers do not utilise an MII interface, since the link state is
typically available directly from a memory-mapped register.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The SnpDxe driver raises the task priority level to TPL_CALLBACK when
calling the UNDI entry point. This does not appear to be a documented
requirement, but we should probably match the behaviour of SnpDxe to
minimise surprises to third party code.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The tap driver can retrieve a potentially unlimited number of packets
in a single poll. This can lead to heap exhaustion under heavy load.
Fix by imposing an artificial receive quota (as already used in other
drivers without natural receive limits).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The UEFI specification has an implicit and demonstrably incorrect
requirement (in the Mem_IO() calling convention) that any UNDI network
device has at most one memory BAR and one I/O BAR.
Some UEFI platforms have been observed to report the existence of
non-existent additional I/O BARs, causing iPXE to select the wrong
BAR. This problem does not affect the SnpDxe driver, since that
driver will always choose the lowest numbered existent BAR of each
type.
Adjust iPXE's behaviour to match that of SnpDxe, i.e. to always select
the lowest numbered BAR(s).
Debugged-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Debugged-by: Adklei <adklei@realtek.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The LAN78xx datapath is essentially identical to that of the SMSC75xx.
Expose the transmit, poll, and bulk IN endpoint operations to allow
for reuse by the LAN78xx driver.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The LAN78xx PHY interrupt source and mask registers do not match those
used by the SMSC75xx and SMSC95xx.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Since we don't enable IOMMU at all, we can then simply enable the
IOMMU support by claiming the support of VIRITO_F_IOMMU_PLATFORM.
This fixes booting failure when iommu_platform is set from qemu cli.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The smsc75xx and smsc95xx drivers include a substantial amount of
identical functionality, varying only in the base address of register
sets. Abstract out this common functionality to allow code to be
shared between the drivers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
We currently use a zero language ID to retrieve strings such as the
ECM/NCM MAC address. This works on most hardware devices, but is
known to fail on some software emulated CDC-NCM devices.
Fix by using the first supported language ID, falling back to English
(0x0409) if any error occurs when fetching the list of supported
languages. This matches the behaviour of the Linux kernel.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Xen network backend (xen-netback) suffered from a regression
between upstream Linux kernels 3.18 and 4.2 inclusive, which would
cause packet reception to fail unless at least 18 receive buffers were
available. This bug was fixed in kernel commit 1d5d485 ("xen-netback:
require fewer guest Rx slots when not using GSO").
Work around this bug in affected versions of xen-netback by providing
the requisite 18 receive buffers.
Reported-by: Taylor Schneider <tschneider@live.com>
Tested-by: Taylor Schneider <tschneider@live.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 7cfdd76 ("[block] Describe all SAN devices via ACPI tables")
changed the definition of the iSCSI initiator IQN in the iBFT to
represent a common initiator IQN used for all iSCSI sessions, and
attempted to calculate this common initiator IQN by fetching the
common ${initiator-iqn} setting.
This fails when no explicit ${initiator-iqn} has been specified
(i.e. when an initiator IQN has instead been constructed from either
the hostname or system UUID), and results in an empty initiator IQN in
the iBFT.
Fix by using the initiator IQN of an arbitrary iSCSI session
present in the iBFT.
Debugged-by: Tal Aloni <tal.aloni.il@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
An "enlightened" external bootloader (such as Windows Server 2016's
winload.exe) may take ownership of the Hyper-V connection before all
INT 13 operations have been completed. When this happens, all VMBus
devices are implicitly closed and we are left with a non-functional
network connection.
Detect when our Hyper-V connection has been lost (by checking the
SynIC message page MSR). Reclaim ownership of the Hyper-V connection
and reestablish any VMBus devices, without disrupting any existing
iPXE state (such as IPv4 settings attached to the network device).
Windows Server 2016 will not cleanly take ownership of an active
Hyper-V connection. Experimentation shows that we can quiesce by
resetting only the SynIC message page MSR; this results in a
successful SAN boot (on a Windows 2012 R2 physical host). Choose to
quiesce by resetting (almost) all MSRs, in the hope that this will be
more robust against corner cases such as a stray synthetic interrupt
occurring during the handover.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
On most Intel NICs, Auto-Speed Detection Enable (ASDE) can be used to
automatically detect the correct link speed by sampling the link using
the internal PHY. This feature is automatically inhibited when not
appropriate for the physical link (e.g. when using internal SerDes
mode on the 8254x).
On the i350 datasheet ASDE is a reserved bit, but the relevant
auto-speed detection hardware appears still to be present. However,
enabling ASDE on the i350 1000BASE-KX backplane NIC seems to cause an
immediate link failure. It is possible that the auto-speed detection
hardware is still present, is not connected to a physical link, and is
not inhibited from being applied in this mode.
Work around this problem by adding an INTEL_NO_ASDE flag bit
(analogous to INTEL_NO_PHY_RST), and applying this for the i350
backplane NIC.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
In situations where iPXE fails to reach link-up as expected, it is
useful to know the original values of the CTRL and STATUS registers
prior to our reset attempt.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Following changes were introduced:
- added GetBgxProp and GetLmacProp methods to ThunderxConfigProtocol
- replaced direct BOARD_CFG access with usage of introduced methods
- removed redundant BOARD_CFG
- changed GUID of ThunderxConfigProtocol, as this is not compatible
with previous version
- changed UINTN* to UINT64* buffer type to fix issue on 32-bit
platforms with MAC address
This change allows us to avoid alignment of BOARD_CFG definitions
every time it changes in UEFI.
Signed-off-by: Konrad Adamczyk <konrad.adamczyk@cavium.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The TEST UNIT READY command is issued automatically when the device is
opened, and is not the result of a command being issued by the caller.
This is required in order that a permanent TEST UNIT READY failure can
be used to identify unusable paths in a multipath SAN device.
Since the TEST UNIT READY command is not part of the caller's command
issuing process, it is not covered by any external retry loops (such
as the main retry loop in sandev_command()).
We must therefore be prepared to retry the TEST UNIT READY command
within the SCSI layer itself. We retry only the TEST UNIT READY
command so as not to multiply the number of potential retries for
normal commands (which are already retried by sandev_command()).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Describe all SAN devices via ACPI tables such as the iBFT. For tables
that can describe only a single device (i.e. the aBFT and sBFT), one
table is installed per device. For multi-device tables (i.e. the
iBFT), all devices are described in a single table.
An underlying SAN device connection may be closed at the time that we
need to construct an ACPI table. We therefore introduce the concept
of an "ACPI descriptor" which enables the SAN boot code to maintain an
opaque pointer to the underlying object, and an "ACPI model" which can
build tables from a list of such descriptors. This separates the
lifecycles of ACPI descriptions from the lifecycles of the block
device interfaces, and allows for construction of the ACPI tables even
if the block device interface has been closed.
For a multipath SAN device, iPXE will wait until sufficient
information is available to describe all devices but will not wait for
all paths to connect successfully. For example: with a multipath
iSCSI boot iPXE will wait until at least one path has become available
and name resolution has completed on all other paths. We do this
since the iBFT has to include IP addresses rather than DNS names. We
will commence booting without waiting for the inactive paths to either
become available or close; this avoids unnecessary boot delays.
Note that the Linux kernel will refuse to accept an iBFT with more
than two NIC or target structures. We therefore describe only the
NICs that are actually required in order to reach the described
targets. Any iBFT with at most two targets is therefore guaranteed to
describe at most two NICs.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When the TEST UNIT READY command receives an error response, the
shutdown of the command's block data interface will result in
scsidev_ready() closing the SCSI device. This will subsequently
result in a duplicate call to scsicmd_close(), leading to an assertion
failure when list_del() is called for the second time.
Fix by removing the command from the list of outstanding commands
before shutting down the command's interfaces.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
B0_CTST is a 24bit register according to the vendor driver (sk98lin).
A 16bit read on B0_CTST will always return 0 for Y2_VAUX_AVAIL
(1<<16), so use a 32bit read when testing Y2_VAUX_AVAIL.
[This patch is copied directly from the Linux kernel tree.]
Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The value of ( ( x & 0x0c00 ) | 0x0c00 ) is always 0x0c00 regardless
of the value of x, and so the read_csr() is redundant. (There are no
read side effects for this register, according to the datasheet.)
This line of code originated in Linux kernel 2.3.19pre1 as
a->write_csr(ioaddr, 80, a->read_csr(ioaddr, 80) | 0x0c00);
and was modified in kernel 2.3.41pre4 to read
a->write_csr(ioaddr, 80, (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
In the absence of commit messages, the intention of the code is
unclear. However, the logic resulting in a fixed value of 0x0c00 has
remained unaltered for over 17 years, and can probably be assumed to
have the correct overall result.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Any underlying errors arising during ib_create_cq() or ib_create_qp()
are lost since the functions simply return NULL on error. This makes
debugging harder, since a debug-enabled build is required to discover
the root cause of the error.
Fix by returning a status code from these functions, thereby allowing
any underlying errors to be propagated.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Report errors in eoib_duplicate() via netdev_tx_err() rather than
netdev_tx_complete_err(), since netdev_tx_complete_err() accepts only
valid I/O buffers that are currently in the network device's transmit
queue.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When the area to be mapped straddles the 2GB boundary, the expression
(high+size) will overflow on the first loop iteration. Fix by using
(end-size), which cannot underflow.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When the area to be mapped straddles the 2GB boundary, the expression
(high+size) will overflow on the first loop iteration. Fix by using
(end-size), which cannot underflow.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
We currently request cable detection in PXE_OPCODE_INITIALIZE to work
around buggy Emulex drivers (see commit c0b61ba ("[efi] Work around
bugs in Emulex NII driver")).
This causes problems with some other NII drivers (e.g. Mellanox),
which may time out if the underlying link is intrinsically slow to
come up.
Attempt to work around both problems simultaneously by requesting
cable detection only if the underlying NII driver does not support
link status reporting via PXE_OPCODE_GET_STATUS. (This is based on a
potentially incorrect assumption that the buggy Emulex drivers do not
claim to report link status via PXE_OPCODE_GET_STATUS.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Several files define the ARRAY_SIZE() macro as used in Linux. Provide
a common definition for this in include/compiler.h.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some VF data is not cleared with reset, so make sure to return all the
settings to default before configuring the VF.
This fixes an issue where network packets would fail to be received if
the VF was previously used by the linux ixgbevf driver.
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When a SCSI device is closed in error, the shutdown of the device's
block data interface will probably lead to any outstanding commands
being closed (by whichever object is currently connected to the block
data interface). However, commands remain in the list of outstanding
commands until the final reference is dropped. The result is that
scsidev_close() will make a second call to scsicmd_close() for each
command. This is harmless, but produces confusing debug messages.
Fix by treating the outstanding command list as holding an explicit
reference to each command, and removing the command from the list of
outstanding commands in scsicmd_close().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The SCSI layer currently implements a retry loop in order to retry
commands that fail due to spurious "error" conditions such as "power
on occurred". Move this retry loop to the generic SAN device layer:
this allow for retries due to other transient error conditions such as
an iSCSI target having dropped the connection due to inactivity.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
According to ThunderX Errata G-17560, NIC_PF_CFG[ENA] bit should not
be cleared at exit. This allows other drivers to access the NIC regs
correctly.
Signed-off-by: Konrad Adamczyk <konrad.adamczyk@cavium.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
It is required to reset BGX context state for the LMAC using
BGX_CMR_CONFIG register.
This solves problem with network connectivity in Linux booted from
iPXE.
Signed-off-by: Bartosz Szczepanek <bartosz.szczepanek@cavium.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Originally-implemented-by: Malte zu Klampen <malte@pclab.ifg.uni-kiel.de>
Originally-implemented-by: Richard Moore <rich@richud.com>
Tested-by: Esben Storgaard Nielsen <esn@solar.dk>
Signed-off-by: Christian Nilsson <nikize@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow the active timer (providing udelay() and currticks()) to be
selected at runtime based on probing during the INIT_EARLY stage of
initialisation.
TICKS_PER_SEC is now a fixed compile-time constant for all builds, and
is independent of the underlying clock tick rate. We choose the value
1024 to allow multiplications and divisions on seconds to be converted
to bit shifts.
TICKS_PER_MS is defined as 1, allowing multiplications and divisions
on milliseconds to be omitted entirely. The 2% inaccuracy in this
definition is negligible when using the standard BIOS timer (running
at around 18.2Hz).
TIMER_RDTSC now checks for a constant TSC before claiming to be a
usable timer. (This timer can be tested in KVM via the command-line
option "-cpu host,+invtsc".)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some host implementations (notably Google Compute Platform) are known
to unconditionally write back VIRTIO_NET_HDR_F_DATA_VALID to
header->flags for received packets, regardless of the features
negotiated by the driver. This breaks the transmit datapath by
effectively setting an illegal flag for all subsequent transmitted
packets.
Work around this problem by using separate empty header buffers for
the receive and transmit queues.
Debugged-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This code largely inspired by tap.c. Allows for testing iPXE on real
NICs from within Linux. For example:
make bin-x86_64-linux/af_packet.linux
valgrind ./bin-x86_64-linux/af_packet.linux --net af_packet,if=eth3
Tested as x86_64 and i386 binary.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Virtio 0.9 implementation was limited to the maximum virtqueue size of
MAX_QUEUE_NUM and the virtio-net driver would fail to initialize on hosts
exceeding this limit.
This commit lifts the restriction by allocating the queue memory based on
the actual queue size instead of using a fixed maximum. Note that virtio
1.0 still uses the MAX_QUEUE_NUM constant to cap the size (unfortunately
this functionality is not available in virtio 0.9).
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit introduces virtnet_free_virtqueues called on all virtqueue
error and shutdown paths. vpm_find_vqs no longer cleans up after itself
and instead expects virtnet_free_virtqueues to be always called to undo
its effect.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
vpm_find_vqs incorrectly accepted the host provided queue size with no
regard to iPXE's internal limitations. Virtio 1.0 makes it possible for
the driver to override the queue size to reduce memory requirements and
iPXE is a great use case for this feature.
Also removing the extra vq->vring.num assignment which is already
handled in vring_init.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Updates:
- Nodnic: Support for arm cq doorbell via the UAR BAR
- Ensure hardware is quiescent when no interface is open - WinPE WA
- Support for clear interrupt via BAR
- Nodnic: Support for send TX doorbells via the UAR BAR
- Added ConnectX-5EX device
- Added ConnectX-5 device
Signed-off-by: Raed Salem <raeds@mellanox.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit db34436 ("[intel] Strip spurious VLAN tags received by virtual
function NICs") accidentally introduced two copies of the
intel[x]vf_mbox_queues() function. Remove the unintended copy.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The physical function may be configured to transparently insert a VLAN
tag into all transmitted packets. Unfortunately, it does not
equivalently strip this same VLAN tag from all received packets. This
behaviour may be observed in some Amazon EC2 instances with Enhanced
Networking enabled: transmissions work as expected but all packets
received by iPXE appear to have a spurious VLAN tag.
We can configure the receive queue to strip VLAN tags via the
RXDCTL.VME bit. We need to find out from the PF driver whether or not
we should do so.
There exists a "get queue configuration" mailbox message which
contains a field labelled IXGBE_VF_TRANS_VLAN in the Linux driver.
A comment in the Linux PF driver describes this field as "notify VF of
need for VLAN tag stripping, and correct queue". It will be filled
with a non-zero value if the PF is enforcing the use of a single VLAN
tag. It will also be filled with a non-zero value if the PF is using
multiple traffic classes.
The Linux VF driver seems to treat this field as being simply the
number of traffic classes, and gives it no VLAN-related
interpretation. The Linux VF driver instead handles the VLAN tag
stripping by simply assuming that any unrecognised VLAN tag ought to
be silently dropped.
We choose to strip and ignore the VLAN tag if the IXGBE_VF_TRANS_VLAN
field has a non-zero value.
Reported-by: Leonid Vasetsky <leonidv@velostrata.com>
Tested-by: Leonid Vasetsky <leonidv@velostrata.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE debug logging doesn't support %u. This commit replaces it with
%d in virtio-pci debug format strings.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
ARM64 has a weaker memory order model than x86. The missing memory
barrier caused phy initialization notification to be delayed beyond
the link-wait timeout (15 secs).
Signed-off-by: Leendert van Doorn <leendert@paramecium.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Extend the 16-bit PCI bus:dev.fn address to a 32-bit seg🚌dev.fn
address, assuming a segment value of zero in contexts where multiple
segments are unsupported by the underlying data structures (e.g. in
the iBFT or BOFM tables).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This backport is from linux kernel upstream commit 83d6f1f ("ath9k:
fix buffer overrun for ar9287").
Signed-off-by: Christian Hesse <mail@eworm.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The UEFI specification requires the EFI_SIMPLE_NETWORK_PROTOCOL
GetStatus() method to set TxBuf to NULL if there are no transmit
buffers to recycle.
Some implementations (observed with Lan9118Dxe in EDK2) fill in TxBuf
only when there is a transmit buffer to recycle, which leads to large
numbers of "spurious TX completion" errors.
Work around this problem by initialising TxBuf to NULL before calling
the GetStatus() method.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 86f96a4 ("[tg3] Remove x86-specific inline assembly")
introduced a regression in _tg3_flag() in 64-bit builds, since any
flags in the upper 32 bits of a 64-bit unsigned long would be
discarded when truncating to a 32-bit int.
Debugged-by: Shane Thompson <shane.thompson@aeontech.com.au>
Tested-by: Shane Thompson <shane.thompson@aeontech.com.au>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit makes virtio-net support devices with VEN 0x1af4 and DEV
0x1041, which is how non-transitional (modern-only) virtio-net devices
are exposed on the PCI bus.
Transitional devices supporting both the old 0.9.5 and new 1.0 version
of the virtio spec are driven using the new protocol. Legacy devices
are driven using the old protocol, same as before this commit.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit adds support for driving virtio 1.0 PCI devices. In
addition to various helpers, a number of vpm_ functions are introduced
to be used instead of their legacy vp_ counterparts when accessing
virtio 1.0 (aka modern) devices.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Virtio 1.0 introduces new constants and data structures, common to all
devices as well as specific to virtio-net. This commit adds a subset
of these to be able to drive the virtio-net 1.0 network device.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
PCI devices may support more capabilities of the same type (for
example PCI_CAP_ID_VNDR) and there was no way to discover all of them.
This commit adds a new API pci_find_next_capability which provides
this functionality. It would typically be used like so:
for (pos = pci_find_capability(pci, PCI_CAP_ID_VNDR);
pos > 0;
pos = pci_find_next_capability(pci, pos, PCI_CAP_ID_VNDR)) {
...
}
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
There is no way for the hardware to give us an invalid length in the
LRH, since it must have parsed this length field in order to perform
header splitting. However, this is difficult to prove conclusively.
Add an unnecessary length check to explicitly reject any packets
larger than the posted receive I/O buffer.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
There is no way for the hardware to give us an invalid length in the
LRH, since it must have parsed this length field in order to perform
header splitting. However, this is difficult to prove conclusively.
Add an unnecessary length check to explicitly reject any packets
larger than the posted receive I/O buffer.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some versions of gcc complain that "'__bswap_variable_32' is static
but used in inline function 'golan_check_rc_and_cmd_status' which is
not static".
Fix by making golan_check_rc_and_cmd_status() a static inline.
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Infiniband specification (volume 1, section 11.4.1.2 "Post Receive
Request") notes that for UD QPs, the GRH will be placed in the first
40 bytes of the receive buffer if present. (If no GRH is present,
which is normal, then the first 40 bytes of the receive buffer will be
unused.)
Mellanox hardware performs this placement automatically: other headers
will be stripped (and their values returned via the CQE), but the
first 40 bytes of the data buffer will be consumed by the (probably
non-existent) GRH.
This does not fit neatly into iPXE's internal abstraction, which
expects the data buffer to represent just the data payload with the
addresses from the GRH (if present) passed as additional parameters to
ib_complete_recv().
The end result of this discrepancy is that attempts to receive
full-sized 2048-byte IPoIB packets on Mellanox hardware will fail.
Fix by allocating a separate ring buffer to hold the received GRHs.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This driver is the original source of the current readq() and writeq()
implementations for 32-bit iPXE. Switch to using the now-centralised
definitions, to avoid including architecture-specific code in an
otherwise architecture-independent driver.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some EoIB implementations utilise an EoIB-to-Ethernet gateway device
that does not perform a FullMember join to the multicast group for the
EoIB broadcast domain. This has various exciting side-effects, such
as requiring every EoIB node to send every broadcast packet twice.
As an added bonus, the gateway may also break the EoIB MAC address to
GID mapping protocol by sending Ethernet-sourced packets from the
wrong QPN.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some EoIB implementations require each individual EoIB node to create
the multicast group for the EoIB broadcast domain.
It is left as an exercise for the interested reader to determine how
such an implementation might ever allow the parameters of such a
multicast group to be changed without requiring a simultaneous upgrade
of every driver on every operating system on every machine currently
attached to the fabric.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some EoIB implementations transmit a vendor-proprietary heartbeat
packet on the same multicast group used to provide the EoIB broadcast
domain.
Silently ignore these heartbeat packets, to avoid cluttering up the
network interface error statistics.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
EoIB is a fairly simple protocol in which raw Ethernet frames
(excluding the CRC) are encapsulated within Infiniband Unreliable
Datagrams, with a four-byte fixed EoIB header (which conveys no actual
information). The Ethernet broadcast domain is provided by a
multicast group, similar to the IPoIB IPv4 multicast group.
The mapping from Ethernet MAC addresses to Infiniband address vectors
is achieved by snooping incoming traffic and building a peer cache
which can then be used to map a MAC address into a port GID. The
address vector is completed using a path record lookup, as for IPoIB.
Note that this requires every packet to include a GRH.
Add basic support for EoIB devices. This driver is substantially
derived from the IPoIB driver. There is currently no mechanism for
automatically creating EoIB devices.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit e62e52b ("[ipoib] Simplify test for received broadcast
packets") relies upon the multicast LID being present in the
destination address vector as passed to ipoib_complete_recv().
Unfortunately, this information is not present in many Infiniband
devices' completion queue entries.
Fix by testing instead for the presence of a multicast GID.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
ath_rx_init() demonstrates some serious confusion over how to use
pointers, resulting in (uint32_t*)NULL being used as a temporary
variable. This does not end well.
The broken code in question is performing manual alignment of I/O
buffers, which can now be achieved more simply using alloc_iob_raw().
Fix by removing ath_rxbuf_alloc() entirely.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some protocols (such as ARP) may modify the received packet and re-use
the same I/O buffer for transmission of a reply. The SMSC95XX
transmit header is larger than the receive header: the re-used I/O
buffer therefore does not have sufficient headroom for the transmit
header, and the ARP reply will therefore fail to be transmitted. This
is essentially the same problem as in commit 2e72d10 ("[ncm] Reserve
headroom in received packets").
Fix by reserving sufficient space at the start of each received packet
to allow for the difference between the lengths of the transmit and
receive headers.
This problem is not caught by the current driver development test
suite (documented at http://ipxe.org/dev/driver), since even the large
file transfer tests tend to completely sufficiently quickly that there
is no need for the server to ever send an ARP request. The failure
shows up only when using a very slow protocol such as RFC7440-enhanced
TFTP (as used by Windows Deployment Services).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The LED pins are configured by default as GPIO inputs. While it is
conceivable that a board might actually use these pins as GPIOs, no
such board is known to exist.
The Linux smsc95xx driver configures these pins unconditionally as LED
outputs. Assume that it is safe to do likewise.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The SMSC95xx devices tend to be used in embedded systems with a
variety of ad-hoc mechanisms for storing the MAC address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some xHCI controllers (such as qemu's emulated xHCI controller) do not
correctly handle zero-length packets that are part of a TRB chain.
The zero-length TRB ends up being squashed and does not result in a
zero-length packet as seen by the device.
Work around this problem by marking the zero-length packet as
belonging to a separate transfer descriptor.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some hubs (e.g. the Avocent Corp. Virtual Hub on a Lenovo x3550
Integrated Management Module) have been observed to require more than
the standard 200ms for ports to stabilise, with the result that
devices appear to disconnect and immediately reconnect during the
initial bus enumeration.
Work around this problem by allowing specific hubs an extra 500ms of
settling time.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Record the speed of a USB device based on the port's speed at the time
that the device was enabled. This allows us to remember the device's
speed even after the device has been disconnected (and so the port's
current speed has changed).
In particular, this allows us to correctly identify the transaction
translator for a low-speed or full-speed device after the device has
been disconnected.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The usb_message() and usb_stream() functions currently check for
port->speed==USB_SPEED_NONE to determine whether or not a device has
been unplugged. This test will give a false negative result if a new
device has been plugged in before the hotplug mechanism has finished
handling the removal of the old device.
Fix by checking instead the port->disconnected flag, which is now
cleared only after completing the removal of the old device.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Tested using QEMU and usbredir to expose the LAN9512 chip present on a
Raspberry Pi.
There is a known issue with the LAN9512: an extra two bytes are
appended to every transmitted packet. These two bytes comprise:
{ 0x00, 0x08 } if packet length == 0 (mod 8)
{ CRC[0], 0x00 } if packet length == 7 (mod 8)
{ CRC[0], CRC[1] } otherwise
The extra bytes are appended whether the Ethernet CRC is generated
manually or added automatically by the hardware. The issue occurs
with the Linux kernel driver as well as the iPXE driver. It appears
to be an undocumented hardware errata.
TCP/IP traffic is not affected, since the IP header length field
causes the extraneous bytes to be discarded by the receiver. However,
protocols that rely on the length of the Ethernet frame (such as FCoE
or iPXE's "lotest" protocol) will be unusable on this hardware.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
On some models (notably ICH), the PHY reset mechanism appears to be
broken. In particular, the PHY_CTRL register will be correctly loaded
from NVM but the values will not be propagated to the "OEM bits" PHY
register. This typically has the effect of dropping the link speed to
10Mbps.
Since the original version of this driver in commit 945e428 ("[intel]
Replace driver for Intel Gigabit NICs"), we have always worked around
this problem by skipping the PHY reset if the link is already up.
Enhance this workaround by explicitly checking for known-broken PCI
IDs.
Reported-by: Robin Smidsrød <robin@smidsrod.no>
Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Make the class ID a property of the USB driver (rather than a property
of the USB device ID), and allow USB drivers to specify a wildcard ID
for any of the three component IDs (class, subclass, or protocol).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Generate a score for each possible USB device configuration based on
the available driver support, and select the configuration with the
highest score. This will allow us to prefer ECM over RNDIS (for
devices which support both) and will allow us to meaningfully select a
configuration even when we have drivers available for all functions
(e.g. when exposing unused functions via EFI_USB_IO_PROTOCOL).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The decision on whether or not a zero-length packet needs to be
transmitted is independent of the host controller and belongs in the
USB core.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow iPXE to coexist with other USB device drivers, by attaching to
the EFI_USB_IO_PROTOCOL instances provided by the UEFI platform
firmware.
The EFI_USB_IO_PROTOCOL is an unsurprisingly badly designed
abstraction of a USB device. The poor design choices intrinsic in the
UEFI specification prevent efficient operation as a network device,
with the result that devices operated using the EFI_USB_IO_PROTOCOL
operate approximately two orders of magnitude slower than devices
operated using our native EHCI or xHCI host controller drivers.
Since the performance is so abysmally slow, and since the underlying
problems are due to fundamental architectural mistakes in the UEFI
specification, support for the EFI_USB_IO_PROTOCOL host controller
driver is left as disabled by default. Users are advised to use the
native iPXE host controller drivers instead.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The raw EFI_HANDLE value is almost never useful to know, and simply
adds noise to the already verbose debug messages. Improve the
legibility of debug messages by using only the name generated by
efi_handle_name().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Infiniband link status change callback ipoib_link_state_changed()
may be called while the IPoIB device is closed, in which case there
will not be an IPoIB queue pair to be joined to the IPv4 broadcast
group. This leads to NULL pointer dereferences in ib_mcast_attach()
and ib_mcast_detach().
Fix by not attempting to join (or leave) the broadcast group unless we
actually have an IPoIB queue pair.
Signed-off-by: Wissam Shoukair <wissams@mellanox.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Multicast MAC addresses will never have REMAC cache entries, and the
corresponding multicast IPoIB MAC address cannot be obtained simply by
issuing an ARP request.
For the trivial volume of multicast packets that we expect to send in
any realistic scenario, the simplest solution is to send them as
broadcasts instead.
Reported-by: Wissam Shoukair <wissams@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The only way to map an eIPoIB MAC address (REMAC) to an IPoIB MAC
address is to intercept an incoming ARP request or reply.
If we do not have an REMAC cache entry for a particular destination
MAC address, then we cannot transmit the packet. This can arise in at
least two situations:
- An external program (e.g. a PXE NBP using the UNDI API) may attempt
to transmit to a destination MAC address that has been obtained by
some method other than ARP.
- Memory pressure may have caused REMAC cache entries to be
discarded. This is fairly likely on a busy network, since REMAC
cache entries are created for all received (broadcast) ARP
requests. (We can't sensibly avoid creating these cache entries,
since they are required in order to send an ARP reply, and when we
are being used via the UNDI API we may have no knowledge of which
IP addresses are "ours".)
Attempt to ameliorate the situation by generating a semi-spurious ARP
request whenever we find a missing REMAC cache entry. This will
hopefully trigger an ARP reply, which would then provide us with the
information required to populate the REMAC cache.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
As with the neighbour cache, discarding an REMAC cache entry is
potentially very disruptive.
Originally-fixed-by: Wissam Shoukair <wissams@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some Intel Skylake platforms (observed on a prototype Lenovo ThinkPad)
report the list of available USB3 protocol speed ID values as {1,2,3}
but then report a port's speed using ID value 4.
The value 4 happens to be the default value for SuperSpeed (when no
protocol speed ID value list is explicitly defined), and the hardware
seems to function correctly if we simply ignore its protocol speed ID
table and assume that it uses the default values.
Fix by adding a "broken PSI values" quirk for this controller.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
gcc 4.8.2 fails to report this erroneous comparison unless assertions
are enabled.
Reported-by: Mary-Ann Johnson <MaryAnn.Johnson@displaylink.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The xHCI slot ID is one-based, not zero-based. Fix the length of the
xhci->slot[] array to account for this, and add assertions to check
that the hardware returns a valid slot ID in response to the Enable
Slot command.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When jumbo frames are enabled, the Linux ixgbe physical function
driver will disable the virtual function's receive datapath by
default, and will enable it only if the virtual function negotiates
API version 1.1 (or higher) and explicitly selects an MTU.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Virtual functions use a mailbox to communicate with the physical
function driver: this covers functionality such as obtaining the MAC
address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Intel virtual function NICs almost work with the use of "legacy"
transmit and receive descriptors (which are backwards compatible right
back to the original Intel Gigabit NICs).
Unfortunately the "TX switching" feature (which allows for VM<->VM
traffic to be looped back within the NIC itself) does not work when a
legacy TX descriptor is used: the packet is instead sent onto the
wire.
Fix by allowing for the use of an "advanced" TX descriptor (containing
exactly the same information as is found in the "legacy" descriptor).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The recorded disconnections (in port->disconnected) will currently be
left uncleared if usb_attached() returns an error (e.g. because there
are no drivers for a particular USB device). This is incorrect
behaviour: the disconnection has been handled and the record should be
cleared until the next physical disconnection is detected (via the CSC
bit).
The problem is masked for EHCI, UHCI, and USB hubs, since these will
report a changed port (via usb_port_changed()) only when the
underlying hardware reports a change. xHCI will call
usb_port_changed() in response to any port status event, at which
point the stale value of port->disconnected will be erroneously acted
upon. This can lead to an endless loop of repeatedly enumerating the
same device when a driverless device is attached to an xHCI root hub
port.
Fix by unconditionally clearing port->disconnected in usb_hotplugged().
Reported-by: Robin Smidsrød <robin@smidsrod.no>
Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The action of registering a new hub can itself happen in only two
ways: either a new USB hub has been created (in which case we are
already inside a call to usb_hotplug()), or a new root hub has been
created.
In the former case, we do not need to issue a further call to
usb_hotplug(), since the hub's ports will all be marked as changed and
so will be handled after the return from register_usb_hub() anyway.
Calling usb_hotplug() within register_usb_hub() leads to a confusing
order of events, such as:
- root hub port 1 detects a change
- root hub port 2 detects a change
- usb_hotplug() is called
- root hub port 1 finds a USB hub
- usb_hotplug() is called
- this inner call to usb_hotplug() handles root hub port 2
Fix by calling usb_hotplug() only from usb_step() and from
register_usb_bus(). This avoids recursive calls to usb_hotplug() and
ensures that devices are enumerated in the order of detection.
Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When USB network card drivers are used, the BIOS' legacy USB
capability is necessarily disabled since there is no way to share the
host controller between the BIOS and iPXE. This currently results in
USB keyboards becoming non-functional in USB-enabled builds of iPXE.
Fix by adding basic support for USB keyboards, enabled by default in
iPXE builds which include USB support.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When an EHCI hotplug action results in the controller disowning the
port, it will result in a hotplug action on the corresponding UHCI or
OHCI controller. Allow such hotplug actions to be carried out as part
of the same call to usb_step() or usb_register_bus(), by maintaining a
single central list of changed ports.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The USB core will currently fail to detect disconnections if a new
device has attached by the time the port is examined in
usb_hotplug().
Fix by recording the fact that a disconnection has taken place
whenever the "connection status changed" (CSC) bit is observed to be
set. (Whether the change represents a disconnection or a
reconnection, it indicates that the port has experienced some time of
being disconnected.)
Note that the time at which a disconnection can be detected varies by
hub type. In particular: root hubs can observe the CSC bit when
polling, and so will record the disconnection before calling
usb_port_changed(), but USB hubs read the port status (and hence the
CSC bit) only during the call to hub_speed(), long after the call to
usb_port_changed().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Rename PCI_CLASS() (which constructs a struct pci_class_id) to
PCI_CLASS_ID(), and provide PCI_CLASS() as a macro which constructs
the 24-bit scalar value of a PCI class code.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The USB API currently assumes that host controllers will have
immediate data buffer space available in which to store the setup
packet. This is true for xHCI, partially true for EHCI (which happens
to have 12 bytes of padding in each transfer descriptor due to
alignment requirements), and not true at all for UHCI.
Include the setup packet within the I/O buffer passed to the host
controller's message() method, thereby eliminating the requirement for
host controllers to provide immediate data buffers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The current API for Base16 (and Base64) encoding requires the caller
to always provide sufficient buffer space. This prevents the use of
the generic encoding/decoding functionality in some situations, such
as in formatting the hex setting types.
Implement a generic hex_encode() (based on the existing
format_hex_setting()), implement base16_encode() and base16_decode()
in terms of the more generic hex_encode() and hex_decode(), and update
all callers to provide the additional buffer length parameter.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This changed in Linux kernel the same way in commit 7067e701
("ath9k_hw: remove confusing logic inversion in an ANI variable") by
Felix Fietkau.
Additionally this fixes "error: logical not is only applied to the
left hand side of comparison" with GCC 5.1.0.
Signed-off-by: Christian Hesse <mail@eworm.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
I218-LM (rev 3) is found in Lenovo Thinkpad X250. The remaining
device IDs are from linux/drivers/net/ethernet/intel/e1000e/hw.h
Signed-off-by: Christian Hesse <mail@eworm.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
On some RTL8169 onboard NICs (observed with a Lenovo ThinkPad 11e),
the EEPROM is not merely not present: any attempt to read from the
non-existent EEPROM will crash and reboot the system.
The equivalent code to read from the EEPROM was removed from the Linux
r8169 driver in 2009 with a comment suggesting that it was similarly
found to be unreliable on some systems.
Fix by accessing the EEPROM only on RTL8139 NICs, and assuming that
the MAC address will always be correctly preset on RTL8169 NICs.
Reported-by: Evan Prohaska <eprohaska@edkey.org>
Tested-by: Evan Prohaska <eprohaska@edkey.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The emulated Intel 82545em in some versions of VMware (observed with
ESXi v5.1) seems to sometimes fail to set the RXT0 bit in the
interrupt cause register (ICR), causing iPXE to stop receiving
packets. Work around this problem (for the 82545em only) by always
polling the receive queue regardless of the state of the ICR.
Reported-by: Slava Bendersky <volga629@networklab.ca>
Tested-by: Slava Bendersky <volga629@networklab.ca>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
At least one NII implementation (in a Microsoft Surface tablet) seems
to fail to report the absence (sic) of TX completions properly. Work
around this by checking for TX completions only when we expect to see
one.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some NII implementations will fail the GET_STATUS operation if we
request the media status. Fix by doing so only if GET_INIT_INFO
reported that media status is supported.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
In theory USB3 ports do not require a reset to enable the port.
Experimentation shows that this is sometimes required, particularly
when rerouting ports from EHCI to xHCI and switching speeds.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
xHCI provides a somewhat convoluted mechanism for specifying details
of a transaction translator. Hubs must be marked as such in the
device slot context. The only opportunity to do so is as part of a
Configure Endpoint command, which can be executed only when opening
the hub's interrupt endpoint.
We add a mechanism for host controllers to intercept the opening of
hub devices, providing xHCI with an opportunity to update the internal
device slot structure for the corresponding USB device to indicate
that the device is a hub. We then include the hub-specific details in
the input context whenever any Configure Endpoint command is issued.
When a device is opened, we record the device slot and port for its
transaction translator (if any), and supply these as part of the
Address Device command.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Support low-speed and full-speed devices attached to a USB2 hub. Such
devices use a transaction translator (TT) within the USB2 hub, which
asynchronously initiates transactions on the lower-speed bus and
returns the result via a split completion on the high-speed bus.
We make the simplifying assumption that there will never be more than
sixteen active interrupt endpoints behind a single transaction
translator; this assumption allows us to schedule all periodic start
splits in microframe 0 and all periodic split completions in
microframes 2 and 3. (We do not handle isochronous endpoints.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The current endpoint reset logic defers the reset until the caller
attempts to enqueue a new transfer to that endpoint. This is
insufficient when dealing with endpoints behind a transaction
translator, since the transaction translator is a resource shared
between multiple endpoints.
We cannot reset the endpoint as part of the completion handling, since
that would introduce recursive calls to usb_poll(). Instead, we
add the endpoint to a list of halted endpoints, and perform the reset
on the next call to usb_step().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The endpoint may already have enqueued TRBs at the time that
xhci_endpoint_reset() is called. Ring the doorbell to resume
processing these TRBs immediately, rather than waiting until the next
call to xhci_endpoint_message() or xhci_endpoint_stream().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Several of the USB timeouts were chosen on the principle of "pick an
arbitrary but ridiculously large value, just to be safe". It turns
out that some of the timeouts permitted by the USB specification are
even larger: for example, control transactions are allowed to take up
to five seconds to complete.
Fix up these USB timeout values to match those found in the USB2
specification.
Debugged-by: Robin Smidsrød <robin@smidsrod.no>
Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
xHCI (and EHCI) nominally provide a mechanism for releasing ownership
of the host controller back to the BIOS, which can then potentially
restore legacy USB keyboard functionality.
This is a rarely used code path, since most operating systems claim
ownership and never attempt to later return to the BIOS. On some
systems (observed with a Lenovo X1 Carbon), this code path leads to
obscure and interesting bugs: if the xHCI and EHCI controllers are
both claimed and later released back to the BIOS, then a subsequent
call to INT 16,0305 to set the keyboard repeat rate to a non-default
value will lock the system.
Obscure though this sequence of operations may sound, it is exactly
what happens when using iPXE to boot a Linux kernel via a USB network
card. There is old and probably unwanted code in Linux's
arch/x86/boot/main.c which sets the keyboard repeat rate (with the
accompanying comment "Set keyboard repeat rate (why?)"). When booting
Linux via a USB network card on a Lenovo X1 Carbon, the system
therefore locks up immediately after jumping to the kernel's entry
point.
Work around this problem by preventing the release of ownership back
to the BIOS if it is known that we are shutting down to boot an OS.
This should allow legacy USB keyboard functionality to be restored if
the user chooses to exit iPXE, while avoiding the rarely used code
paths (and corresponding BIOS bugs) if the user chooses instead to
boot an OS.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
If the BIOS fails to gracefully release ownership of the xHCI
controller, we can forcibly claim it by disabling all SMIs via the
USB legacy support control/status register.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
RX FIFO overflow is almost inevitable since the (usable) USB2 bus
bandwidth is approximately one quarter of the Ethernet bandwidth.
Avoid flooding the console with RX FIFO overflow messages in a
standard debug build.
With TCP SACK implemented, the RX FIFO overflow no longer causes a
catastrophic drop in throughput. Experimentation shows that HTTP
downloads now progress at a fairly smooth 250Mbps, which is around the
maximum speed attainable for a USB2 NIC.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This driver is functional but any downloads via a TCP-based protocol
tend to perform poorly. The 1Gbps Ethernet line rate is substantially
higher than the 480Mbps (in practice around 280Mbps) provided by USB2,
and the device has only 32kB of internal buffer memory. Our 256kB TCP
receive window therefore rapidly overflows the RX FIFO, leading to
multiple dropped packets (usually within the same TCP window) and
hence a low overall throughput.
Reducing the TCP window size so that the RX FIFO does not overflow
greatly increases throughput, but is not a general-purpose solution.
Further investigation is required to determine how other OSes
(e.g. Linux) cope with this scenario. It is possible that
implementing TCP SACK would provide some benefit.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Most devices expose at least the link up/down status via a bit in a
MAC register, since the MAC generally already needs to know whether or
not the link is up. Some devices (e.g. the SMSC75xx USB NIC) expose
this information to software only via the MII registers.
Provide a generic mii_check_link() implementation to check the BMSR
and report the link status via netdev_link_{up,down}().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE already sends RX notifications to the backend when needed, but
does not set the "feature-rx-notify" flag. As of XenServer 6.5, this
flag is mandatory and omitting it will cause the backend to fail.
Fix by setting the "feature-rx-notify" flag, to inform the backend
that we will send notifications.
Reported-by: Shalom Bhooshi <shalom.bhooshi@citrix.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Restore the original values of XUSB2PR and USB3PSSEN, in case we are
booting an OS with no support for xHCI.
Suggested-by: Dan Ellis <Dan.Ellis@displaylink.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Intel PCH controllers default to routing USB2 ports to EHCI rather
than xHCI, and default to disabling SuperSpeed connections.
Manipulate the PCI configuration space registers as necessary to
reroute ports and enable SuperSpeed.
Originally-fixed-by: Dan Ellis <Dan.Ellis@displaylink.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Relicense files with kind permission from
Stefan Hajnoczi <stefanha@redhat.com>
alongside the contributors who have already granted such relicensing
permission.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
At some point in the past few years, binutils became more aggressive
at removing unused symbols. To function as a symbol requirement, a
relocation record must now be in a section marked with @progbits and
must not be in a section which gets discarded during the link (either
via --gc-sections or via /DISCARD/).
Update REQUIRE_SYMBOL() to generate relocation records meeting these
criteria. To minimise the impact upon the final binary size, we use
existing symbols (specified via the REQUIRING_SYMBOL() macro) as the
relocation targets where possible. We use R_386_NONE or R_X86_64_NONE
relocation types to prevent any actual unwanted relocation taking
place. Where no suitable symbol exists for REQUIRING_SYMBOL() (such
as in config.c), the macro PROVIDE_REQUIRING_SYMBOL() can be used to
generate a one-byte-long symbol to act as the relocation target.
If there are versions of binutils for which this approach fails, then
the fallback will probably involve killing off REQUEST_SYMBOL(),
redefining REQUIRE_SYMBOL() to use the current definition of
REQUEST_SYMBOL(), and postprocessing the linked ELF file with
something along the lines of "nm -u | wc -l" to check that there are
no undefined symbols remaining.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
These files cannot be automatically relicensed by util/relicense.pl
since they either contain unusual but trivial contributions (such as
the addition of __nonnull function attributes), or contain lines
dating back to the initial git revision (and so require manual
knowledge of the code's origin).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Relicence files with kind permission from the following contributors:
Alex Williamson <alex.williamson@redhat.com>
Eduardo Habkost <ehabkost@redhat.com>
Greg Jednaszewski <jednaszewski@gmail.com>
H. Peter Anvin <hpa@zytor.com>
Marin Hannache <git@mareo.fr>
Robin Smidsrød <robin@smidsrod.no>
Shao Miller <sha0.miller@gmail.com>
Thomas Horsten <thomas@horsten.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Add the standard warranty disclaimer and Free Software Foundation
address paragraphs to the licence text where these are not currently
present.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When a command times out, abort it (via the Command Abort bit in the
Command Ring Control Register) so that subsequent commands may execute
as expected.
This improves robustness when a device fails to respond to the Set
Address command, since the subsequent Disable Slot command will now
succeed.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
If the Disable Slot command fails then the hardware may continue to
write to the slot context. Leak the memory used by the slot context
to avoid future memory corruption.
This situation has been observed in practice when a Set Address
command fails, causing the command ring to become temporarily
unresponsive.
Note that there is no need to similarly leak memory on the failure
path in xhci_device_open(), since in the event of a failure the
hardware is never informed of the slot context address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Provide a generic framework for allocating, refilling, and optionally
recycling I/O buffers used by bulk IN and interrupt endpoints.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit a60f2dd ("[usb] Try multiple USB device configurations")
changed the behaviour of register_usb() such that if no drivers are
found then the device will be closed and the memory used will be
freed.
If a port status change subsequently occurs while the device is still
physically attached, then usb_hotplug() will see this as a new device
having been attached, since there is no device recorded as being
currently attached to the port. This can lead to spurious hotplug
events (or even endless loops of hotplug events, if the process of
opening and closing the device happens to generate a port status
change).
Fix by using a separate flag to indicate that a device is physically
attached (even if we have no corresponding struct usb_device).
Reported-by: Dan Ellis <Dan.Ellis@displaylink.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some xHCI controllers (observed with a Renesas Electronics PCIe USB3
card) seem to require a delay after forcing the link state of USB3
ports to RxDetect. Omitting this delay causes strange behaviour
including system lockups.
Add an unconditional 20ms delay after writing the port link states.
This seems to be sufficient to avoid the problem.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some USB endpoints require that a short packet be used to terminate
transfers, since they have no other way to determine message
boundaries. If the message length happens to be an exact multiple of
the USB packet size, then this requires the use of an additional
zero-length packet.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
USB Communications Device Class devices may use a union functional
descriptor to group several interfaces into a function.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Iterate over a USB device's available configurations until we find one
for which we have working drivers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some protocols (such as ARP) may modify the received packet and re-use
the same I/O buffer for transmission of a reply. To allow this,
reserve sufficient headroom at the start of each received packet
buffer for our transmit datapath headers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some devices have a very small number of internal buffers, and rely on
being able to pack multiple packets into each buffer. Using 2048-byte
buffers on such devices produces throughput of around 100Mbps. Using
a small number of much larger buffers (e.g. 32kB) increases the
throughput to around 780Mbps. (The full 1Gbps is not reached because
the high RTT induced by the use of multi-packet buffers causes us to
saturate our 256kB TCP window.)
Since allocation of large buffers is very likely to fail, allocate the
buffer set only once when the device is opened and recycle buffers
immediately after use. Received data is now always copied to
per-packet buffers.
If allocation of large buffers fails, fall back to allocating a larger
number of smaller buffers. This will give reduced performance, but
the device will at least still be functional.
Share code between the interrupt and bulk IN endpoint handlers, since
the buffer handling is now very similar.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow drivers to specify a supported PCI class code. To save space in
the final binary, make this an attribute of the driver rather than an
attribute of a PCI device ID list entry.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The (undocumented) VMBus protocol seems to allow for transfer
page-based packets where the data payload is split into an arbitrary
set of ranges within the transfer page set.
The RNDIS protocol includes a length field within the header of each
message, and it is known from observation that multiple RNDIS messages
can be concatenated into a single VMBus message.
iPXE currently assumes that the transfer page range boundaries are
entirely arbitrary, and uses the RNDIS header length to determine the
RNDIS message boundaries.
Windows Server 2012 R2 generates an RNDIS_INDICATE_STATUS_MSG for an
undocumented and unknown status code (0x40020006) with a malformed
RNDIS header length: the length does not cover the StatusBuffer
portion of the message. This causes iPXE to report a malformed RNDIS
message and to discard any further RNDIS messages within the same
VMBus message.
The Linux Hyper-V driver assumes that the transfer page range
boundaries correspond to RNDIS message boundaries, and so does not
notice the malformed length field in the RNDIS header.
Match the behaviour of the Linux Hyper-V driver: assume that the
transfer page range boundaries correspond to the RNDIS message
boundaries and ignore the RNDIS header length. This avoids triggering
the "malformed packet" error and also avoids unnecessary data copying:
since we now have one I/O buffer per RNDIS message, there is no longer
any need to use iob_split().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Empirical observation suggests that 32 is a sensible size to minimise
the number of deferred packet transmissions without overflowing the
VMBus transmit ring buffer.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow for elision of transmitted TCP ACKs by handling all received
VMBus messages in each network device poll operation.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
On Windows Server 2012 R2, the receive buffer teardown completion
message seems to occasionally be deferred until after the VMBus
channel has been closed. This happens even if there are no packets
currently in the receive buffer.
Work around this problem by separating the revocation and teardown of
the receive buffer, and deferring the teardown until after the VMBus
channel has been closed.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The i350 (and possibly other Intel NICs) have a non-trivial
correspondence between the PCI function number and the external
physical port number. For example, the i350 has a "LAN Function Sel"
bit within the EEPROM which can invert the mapping so that function 0
becomes port 3, function 1 becomes port 2, etc.
Unfortunately the MAC addresses within the EEPROM are indexed by
physical port number rather than PCI function number. The end result
is that when anything other than the default mapping is used, iPXE
will use the wrong address as the base MAC address.
Fix by using the autoloaded MAC address if it is valid, and falling
back to reading the MAC address directly from the EEPROM only if no
autoloaded address is available.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
End users almost certainly don't care whether the underlying interface
is SNP or NII/UNDI. Try to minimise surprise and unnecessary
documentation by including the NII driver whenever the SNP driver is
requested.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE itself exposes a dummy NII protocol with no UNDI. Avoid
potentially dereferencing a NULL pointer by checking for a non-zero
UNDI address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some UEFI network drivers provide a software UNDI interface which is
exposed via the Network Interface Identifier Protocol (NII), rather
than providing a Simple Network Protocol (SNP).
The UEFI platform firmware will usually include the SnpDxe driver,
which attaches to NII and provides an SNP interface. The SNP
interface is usually provided on the same handle as the underlying NII
device. This causes problems for our EFI driver model: when
efi_driver_connect() detaches existing drivers from the handle it will
cause the SNP interface to be uninstalled, and so our SNP driver will
not be able to attach to the handle. The platform firmware will
eventually reattach the SnpDxe driver and may attach us to the SNP
handle, but we have no way to prevent other drivers from attaching
first.
Fix by providing a driver which can attach directly to the NII
protocol, using the software UNDI interface to drive the network
device.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The snpnet driver uses netdev_tx_defer() and so must ensure that space
in the (single-entry) transmit descriptor ring is freed up before
calling netdev_tx_complete().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Rob Taglang
Michael Brown
Joseph Wong
Janos Mattyasovszky
Peter von Konigsmark
Richard Moore
Jason Wang
Jerone Young
Mika Tiainen
Martin Habets
Adamczyk, Konrad
Mike McCormack
Raed Salem
Vishvananda Ishaya
Bartosz Szczepanek
Christian Nilsson
David Decotigny
Ladi Prosek
Lukas Grossar
Leendert van Doorn
Christian Hesse
Wissam Shoukair
Hummel Frank
Torgeir Wulfsberg
Kyösti Mälkki
Carl Henrik Lunde
Fabrice Bacchella
Bernd Wiebelt
Ed Swierk
Laszlo Ersek
Thomas Miletich