The Raspberry Pi NIC has no EEPROM to hold the MAC address. The
platform firmware (e.g. UEFI or U-Boot) will typically obtain the MAC
address from the VideoCore firmware and add it to the device tree,
which is then made available to subsequent programs such as iPXE or
the Linux kernel.
Add the ability to parse a flattened device tree and to extract the
MAC address.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
efidev_parent() currently assumes that any device with BUS_TYPE_EFI is
part of a struct efi_device. This assumption is not valid, since the
code in efi_device_info() may also create a device with BUS_TYPE_EFI.
Fix by searching through the list of registered EFI devices when
looking for a match, instead of relying on the bus type value.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
It is currently not possible to build the all-drivers iPXE binaries
for ARM, since there is no implementation for inb(), outb(), etc.
There is no common standard for accessing I/O space on ARM platforms,
and there are almost no ARM-compatible peripherals that actually
require I/O space accesses.
Provide dummy implementations that behave as though no device is
present (i.e. ignore writes, return all bits high for reads). This is
sufficient to allow the all-drivers binaries to link, and should cause
drivers to behave as though no I/O space peripherals are present in
the system.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 1a7746603 ("[build] Fix use of inline assembly on GCC 4.8 ARM64
builds") switched from using "%c0" to "%a0" in order to avoid an
"invalid operand prefix" error on the ARM64 version of GCC 4.8.
It appears that the ARM64 version of GCC 8 now produces an "invalid
address mode" error for the "%a0" form, but is happy with the original
"%c0" form.
Switch back to using the "%c0" form, on the assumption that the
requirement for "%a0" was a temporary aberration.
Originally-fixed-by: John L. Jolly <jjolly@suse.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The physical function defaults to operating in "PXE mode" after a
power-on reset. In this mode, receive descriptors are fetched and
written back as single descriptors. In normal (non-PXE mode)
operation, receive descriptors are fetched and written back only as
complete cachelines unless an interrupt is raised.
There is no way to return to PXE mode from non-PXE mode, and there is
no way for the virtual function driver to operate in PXE mode.
Choose to operate in non-PXE mode. This requires us to trick the
hardware into believing that it is raising an interrupt, so that it
will not defer writing back receive descriptors until a complete
cacheline (i.e. four packets) have been consumed. We do so by
configuring the hardware to use MSI-X with a dummy target location in
place of the usual APIC register.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The virtual function driver will use the same transmit and receive
descriptor ring structures, but will not itself construct and program
the ring context. Split out ring creation and destruction from the
programming of the ring context, to allow code to be shared between
physical and virtual function drivers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The virtual function transmit and receive ring tail register offsets
do not match those of the physical function. Allow the tail register
offsets to be specified separately.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The physical function driver does not allow the virtual function to
request the use of 16-byte receive descriptors. Switch to using
32-byte receive descriptors.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Provide a weak stub function for handling the "send to VF" event used
for communications between the physical and virtual function drivers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The "send to PF" and "send to VF" admin queue descriptors (ab)use the
cookie field to hold the extended opcode and return code values.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
A virtual function reset is triggered via an admin queue command and
will reset the admin queue configuration registers. Allow the admin
queues to be reinitialised after such a reset, without requiring the
overhead (and potential failure paths) of freeing and reallocating the
queues.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
We currently use a single data buffer shared between all admin queue
descriptors. This works for the physical function driver since we
have at most one command in progress and only a single event (which
does not use a data buffer).
The communication path between the physical and virtual function
drivers uses the event data buffer, and there is no way to prevent a
solicited event (i.e. a response to a request) from being overwritten
by an unsolicited event (e.g. a link status change).
Provide individual data buffers for each admin event queue descriptor
(and for each admin command queue descriptor, for the sake of
consistency).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The register map for the virtual functions appears to have been
constructed using a random number generator.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The physical function driver does not allow the virtual function to
request that VLAN tags are left unstripped. Extract and use the VLAN
tag from the receive descriptor if present.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Hermon driver uses vlan_find() to identify the appropriate VLAN
device for packets that are received with the VLAN tag already
stripped out by the hardware. Generalise this capability and expose
it for use by other network card drivers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Intel 40 Gigabit Ethernet virtual functions support only MSI-X
interrupts, and will write back completed interrupt descriptors only
when the device attempts to raise an interrupt (or when a complete
cacheline of receive descriptors has been completed).
We cannot actually use MSI-X interrupts within iPXE, since we never
have ownership of the APIC. However, an MSI-X interrupt is
fundamentally just a DMA write of a single dword to an arbitrary
address. We can therefore configure the device to "raise" an
interrupt by writing a meaningless value to an otherwise unused memory
location: this is sufficient to trigger the receive descriptor
writeback logic.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
One of the design goals of ASN.1 DER is to provide a canonical
serialization of a data structure, thereby allowing for equality of
values to be tested by simply comparing the serialized bytes.
Some OCSP servers will modify the request certID to omit the optional
(and null) "parameters" portion of the hashAlgorithm. This is
arguably legal but breaks the ability to perform a straightforward
bitwise comparison on the entire certID field between request and
response.
Fix by comparing the OID-identified hashAlgorithm separately from the
remaining certID fields.
Originally-fixed-by: Thilo Fromm <Thilo@kinvolk.io>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Provide increased visibility into the progress of TCP connections by
displaying an explicit "connecting" status message while waiting for
the TCP handshake to complete.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
TLS connections will almost always create background connections to
perform cross-signed certificate downloads and OCSP checks. There is
currently no direct visibility into which checks are taking place,
which makes troubleshooting difficult in the absence of either a
packet capture or a debug build.
Use the job progress message buffer to report the current cross-signed
certificate download or OCSP status check, where applicable.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Record the session ID (if any) provided by the server and attempt to
reuse it for any concurrent connections to the same server.
If multiple connections are initiated concurrently (e.g. when using
PeerDist) then defer sending the ClientHello for all but the first
connection, to allow time for the first connection to potentially
obtain a session ID (and thereby speed up the negotiation for all
remaining connections).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
On a Dell OptiPlex 7010, calling DisconnectController() on the LOM
device handle will lock up the system. Debugging shows that execution
is trapped in an infinite loop that is somehow trying to reconnect
drivers (without going via ConnectController()).
The problem can be reproduced in the UEFI shell with no iPXE code
present, by using the "disconnect" command. Experimentation shows
that the only fix is to unload (rather than just disconnect) the
"Ip4ConfigDxe" driver.
Add the concept of a blacklist of UEFI drivers that will be
automatically unloaded when iPXE runs as an application, and add the
Dell Ip4ConfigDxe driver to this blacklist.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Option::ROM module recognizes and checks EFI header of image. The
disrom.pl utility dumps this header if is present.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The Option::ROM module now compares the Code Type in the PCIR header
to 0x00 (PC-AT) in order to check the presence of other header types
(PnP, UNDI, iPXE, etc). The validity of these headers are checked not
only by offset, but by range and signature checks also. The image
checksum and initial size also depends on Code Type.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
GCC 9 warns that abs() may truncate its signed long argument. Fix by
using labs() instead.
Reported-by: Martin Liška <mliska@suse.cz>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Fix strcmp() and strncmp() to return proper standard positive/negative
values for unequal strings. Current implementation is backwards
(i.e. the functions are returning negative when should be positive and
vice-versa).
Currently all consumers of these functions only check the return value
for ==0 or !=0 and so we can safely change the implementation without
breaking things.
Signed-off-by: Aaron Young <Aaron.Young@oracle.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Current (simplified):
1. InstallMultipleProtocolInterfaces
if err goto err_install_protocol_interface;
2. OpenProtocol(efi_nii_protocol_guid)
if err goto err_open_nii;
3. OpenProtocol(efi_nii31_protocol_guid)
if err goto err_open_nii31;
4. efi_child_add
if err goto err_efi_child_add;
...
err_efi_child_add:
CloseProtocol(efi_nii_protocol_guid) <= should be efi_nii31_protocol_guid
err_open_nii: <= should be err_open_nii31
CloseProtocol(efi_nii31_protocol_guid) <= should be efi_nii_protocol_guid
err_open_nii31: <= should be err_open_nii
UninstallMultipleProtocolInterfaces
Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
PCI Configuration Space contains fields prog-if at the offset 0x09,
sub-class at the offset 0x0a and base-class at the offset 0x0b (it
respects little endian). PCIR structure uses these fields in the same
order.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Starting from binutils 2.31.0 (commit bd7ab16b) x86-64 assembler
generates R_X86_64_PLT32 instead of R_X86_64_PC32.
Acked-by: John Jolly <jjolly@suse.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The first adapters in this family are X2522-10, X2522-25, X2541 and
X2542.
These no longer use PCI BAR 0 for I/O, but use that for memory. In
other words, BAR 2 on SFN8xxx adapters now becomes BAR 0.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Devices that support jumbo frames will currently default to the
largest possible MTU. This assumption is valid for virtual adapters
such as virtio-net, where the MTU must have been configured by a
system administrator, but is unsafe in the general case of a physical
adapter.
Default to the standard Ethernet MTU, unless explicitly overridden
either by the driver or via the ${netX/mtu} setting.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Avoid calling rndis_halt() and rndis->op->close() twice if the call to
register_netdev() fails.
Reported-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some versions of gcc seem to silently accept an attempt to disable an
unrecognised warning (e.g. via -Wno-stringop-truncation) but will then
report the unrecognised warning if any other error occurs during the
build, resulting in a potentially misleading error message.
Avoid this potential confusion by using the positive-form tests in
order to determine the workaround CFLAGS.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The definition of version_response channel message in Linux doesn't
include version field, so the upcoming VMBus implementation in QEMU
doesn't set it either. Neither Windows nor Linux had any problem with
this.
The check against this field is redundant because the message is the
response to initiate_contact message containing the specific version
requested, so the response with version_supported=true is unambiguous.
Drop this check and don't rely on the field to be present in the
message.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
register_netdev expects ->hw_addr and ->ll_addr to be already filled,
so move it towards the end of register_rndis, after the respective
fields have been successfully queried from the underlying device.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The gcc 8 compiler introduces a warning for certain string
manipulation functions, flagging usages which _may_ not be intended.
An audit of the iPXE sources indicates all usages of strncat and
strncpy are as intended, so the warnings currently issued are not
helpful, especially if warnings are considered errors.
Fix by detecting gcc's support for -Wno-stringop-truncation and, if
detected, using that option to avoid the warning.
Signed-off-by: Bruce Rogers <brogers@suse.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Also-fixed-by: Christian Hesse <list@eworm.de>
Also-fixed-by: Roman Kagan <rkagan@virtuozzo.com>
Also-fixed-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Also-fixed-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
As pointedly documented in RFC7230 section 2.3, HTTP is a stateless
protocol: each request message can be understood in isolation from any
other requests or responses. Various authentication schemes such as
NTLM break this fundamental property of HTTP and rely on the same TCP
connection being reused.
Work around these broken authentication schemes by ensuring that the
most recently pooled connection is reused for the subsequent
authentication retry.
Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Add the function mii_find() in order to locate the PHY address.
Signed-off-by: Sylvie Barlow <sylvie.c.barlow@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
We currently have no generic concept of a PHY address, since all
existing implementations simply hardcode the PHY address within the
MII access methods.
A bit-bashing MII interface will need to be provided with an explicit
PHY address in order to generate the correct waveform. Allow for this
by separating out the concept of a MII device (i.e. a specific PHY
address attached to a particular MII interface).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow the subsystem IDs to be used when checking for PXE stacks with
broken interrupt support.
Suggested-by: Levi Hsieh <Levi.Hsieh@dell.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The relocation type R_ARM_REL32 is generated when building
bin-arm32-efi/snp.efi using gcc 6.3 and ld 2.28.
R_ARM_REL32 is a program counter (PC) relative 32 bit relocation so we
can ignore it like all other PC relative relocations.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When booting some versions of the UEFI shell, our driver binding
protocol's Supported() entry point is called at TPL_NOTIFY for no
discernible reason. Attempting to raise to TPL_CALLBACK triggers an
immediate assertion failure in the firmware.
Since our Supported() method can run at any TPL, fix by simply not
attempting to raise the TPL within this method.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Release SNP devices to allow the SAN booted image to use our
EFI_SIMPLE_NETWORK_PROTOCOL instance, and to ensure that the image is
started at TPL_APPLICATION.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The cipherstream xfer_window_changed() message is used to retrigger
the TLS transmit state machine. If the transmit state machine is
idle, then the window change message will not be propagated to the
plainstream interface. This can potentially cause the plainstream
interface peer (e.g. httpcore) to block waiting for a window change
message that will never arrive.
Fix by ensuring that the window change message is propagated to the
plainstream interface if the transmit state machine is idle. (If the
transmit state machine is not idle then the plainstream window will be
zero anyway.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
In TLS terminology a session conceptually spans multiple individual
connections, and essentially represents the stored cryptographic state
(master secret and cipher suite) required to establish communication
without going through the certificate and key exchange handshakes.
Rename tls_session to tls_connection in order to make the name
tls_session available to represent the session state.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
A failure in tls_generate_random() will result in a call to ref_put()
before the received data list has been initialised, which will cause
free_tls() to attempt to traverse an uninitialised list.
Fix by ensuring that all fields referenced by free_tls() are
initialised before any of the potential failure paths.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 6149e0a ("[librm] Provide symbols for inline code placed into
other sections") may cause build failures due to duplicate label names
if the compiler chooses to duplicate inline assembly code.
Fix by using the "%=" special format string to include a
guaranteed-unique number within the label name.
The "%=" will be expanded only if constraints exist for the inline
assembly. This fix therefore requires that all REAL_CODE() fragments
use a (possibly empty) constraint list.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Provide symbols constructed from the object name and line number for
code fragments placed into alternative sections, such as inline
REAL_CODE() assembly placed into .text16. This simplifies the
debugging task of finding the source code corresponding to a given
instruction pointer.
Note that we cannot use __FUNCTION__ since it is not a preprocessor
macro and so cannot be concatenated with string literals.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
If the underlying PXE stack reports an invalid IRQ number (above
IRQ_MAX), treat this as equivalent to an empty IRQ number and fall
back to using polling mode.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The existence of MMX and SSE is required by the System V x86_64 ABI
and so is assumed by gcc, but these registers are not preserved by our
own interrupt handlers and are unlikely to be preserved by other
context switch handlers in a boot firmware environment.
Explicitly prevent gcc from using MMX or SSE registers to avoid
potential problems due to silent register corruption.
We must remove the %xmm0-%xmm5 clobbers from the x86_64 version of
hv_call() since otherwise gcc will complain about unknown register
names. Theoretically, we should probably add code to explicitly
preserve the %xmm0-%xmm5 registers across a hypercall, in order to
guarantee to external code that these registers remain unchanged. In
practice this is difficult since SSE registers are disabled by
default: for background information see commits 71560d1 ("[librm]
Preserve FPU, MMX and SSE state across calls to virt_call()") and
dd9a14d ("[librm] Conditionalize the workaround for the Tivoli VMM's
SSE garbling").
Signed-off-by: Michael Brown <mcb30@ipxe.org>
We currently perform various min-entropy calculations using build-time
floating-point arithmetic. No floating-point code ends up in the
final binary, since the results are eventually converted to integers
and asserted to be compile-time constants.
Though this mechanism is undoubtedly cute, it inhibits us from using
"-mno-sse" to prevent the use of SSE registers by the compiler.
Fix by using fixed-point arithmetic instead.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This is required to work around a bug in some firmware versions.
Signed-off-by: Ameer Mahagneh <ameerm@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Allow the ACPI power management timer to be used if enabled via
TIMER_ACPI in config/timer.h. This provides an alternative timer on
systems where the standard 8254 PIT is unavailable or unreliable.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some drivers are known to call the optional Map_Mem() callback without
first checking that the callback exists. Provide a usable basic
implementation of Map_Mem() along with the other callbacks that become
mandatory if Map_Mem() is provided.
Note that in theory the PCI I/O protocol is allowed to require
multiple calls to Map(), with each call handling only a subset of the
overall mapped range. However, the reference implementation in EDK2
assumes that a single Map() will always suffice, so we can probably
make the same simplifying assumption here.
Tested with the Intel E3522X2.EFI driver (which, incidentally, fails
to cleanly remove one of its mappings).
Originally-implemented-by: Maor Dickman <maord@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The blocked link test in eth_slow_lacp_rx() is performed before the
actor TLV is copied to the partner TLV, and so must test the actor
state field rather than the partner state field.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some CAs provide non-functional OCSP servers, and some clients are
forced to operate on networks without access to the OCSP servers.
Allow the user to explicitly disable the use of OCSP checks by
undefining OCSP_CHECK in config/crypto.h.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Limit the profile sample count to INT_MAX to avoid both signed
overflow and a potential division by zero when updating the stored
mean value.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Mark the link as blocked if the LACP partner is not reporting itself
as being in sync, collecting, and distributing.
This matches the behaviour for STP: we mark the link as blocked if we
detect that the switch is actively blocking traffic, in order to
extend the DHCP discovery period and so prevent boot failures on
switches that take an excessively long time to enable ports.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Remove the global variable shomron_nodnic_supported, since it may have
different values for different PCI devices.
Originally-fixed-by: Mohammed Taha <mohammedt@mellanox.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
When DEBUG=librm_mgmt is enabled, intercept CPU exceptions and provide
a register and stack dump, then drop to an emergency shell. Exiting
from the shell will almost certainly not work, but this provides an
opportunity to view the register and stack dump and carry out some
basic debugging.
Note that we can intercept only the first 8 CPU exceptions, since a
PXE ROM is not permitted to rebase the PIC.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit c89a446 ("[efi] Run at TPL_CALLBACK to protect against UEFI
timers") introduced a regression in the EFI entropy gathering code.
When the EFI_RNG_PROTOCOL is not present, we fall back to using timer
interrupts (as for the BIOS build). Since timer interrupts are
disabled at TPL_CALLBACK, WaitForEvent() fails and no entropy can be
gathered.
Fix by dropping to TPL_APPLICATION while entropy gathering is enabled.
Reported-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
The iSCSI root path may contain a literal IPv6 address. Update the
parser to handle this address format correctly.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
As noted in the comments, UEFI manages to combines the all of the
worst aspects of both a polling design (inefficiency and inability to
sleep until something interesting happens) and of an interrupt-driven
design (the complexity of code that could be preempted at any time,
thanks to UEFI timers).
This causes problems in particular for UEFI USB keyboards: the
keyboard driver calls UsbAsyncInterruptTransfer() to set up a periodic
timer which is used to poll the USB bus. This poll may interrupt a
critical section within iPXE, typically resulting in list corruption
and either a hang or reboot.
Work around this problem by mirroring the BIOS design, in which we run
with interrupts disabled almost all of the time.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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>
Michael Brown
Mohammed
Christian Nilsson
Petr Borsodi
Aaron Young
Ignat Korchagin
Christian Hesse
Martin Habets
Roman Kagan
Rob Taglang
Steven Haber
Bruce Rogers
Sylvie Barlow
Rob Taglang
Heinrich Schuchardt
Robin Smidsrød
Ameer Mahagneh
Hannes Reinecke