Bjorn Helgaas 25f6c4c440 PCI: Work around Intel I210 ROM BAR overlap defect ... [ Upstream commit 500b55b05d ] Per PCIe r5, sec 7.5.1.2.4, a device must not claim accesses to its Expansion ROM unless both the Memory Space Enable and the Expansion ROM Enable bit are set. But apparently some Intel I210 NICs don't work correctly if the ROM BAR overlaps another BAR, even if the Expansion ROM is disabled. Michael reported that on a Kontron SMARC-sAL28 ARM64 system with U-Boot v2021.01-rc3, the ROM BAR overlaps BAR 3, and networking doesn't work at all: BAR 0: 0x40000000 (32-bit, non-prefetchable) [size=1M] BAR 3: 0x40200000 (32-bit, non-prefetchable) [size=16K] ROM: 0x40200000 (disabled) [size=1M] NETDEV WATCHDOG: enP2p1s0 (igb): transmit queue 0 timed out Hardware name: Kontron SMARC-sAL28 (Single PHY) on SMARC Eval 2.0 carrier (DT) igb 0002:01:00.0 enP2p1s0: Reset adapter Previously, pci_std_update_resource() wrote the assigned ROM address to the BAR only when the ROM was enabled. This meant that the I210 ROM BAR could be left with an address assigned by firmware, which might overlap with other BARs. Quirk these I210 devices so pci_std_update_resource() always writes the assigned address to the ROM BAR, whether or not the ROM is enabled. Link: https://lore.kernel.org/r/20211223163754.GA1267351@bhelgaas Link: https://lore.kernel.org/r/20201230185317.30915-1-michael@walle.cc Link: https://bugzilla.kernel.org/show_bug.cgi?id=211105 Reported-by: Michael Walle <michael@walle.cc> Tested-by: Michael Walle <michael@walle.cc> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Stable-dep-of: 627c6db20703 ("PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports") Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-04-10 16:18:38 +02:00
..
acpi	…
asm-generic	arm64: irq: set the correct node for VMAP stack	2024-02-23 08:54:36 +01:00
clocksource	…
crypto	crypto: af_alg - Disallow multiple in-flight AIO requests	2024-01-25 14:52:34 -08:00
drm	drm/ttm: add ttm_resource_fini v2	2024-03-26 18:21:25 -04:00
dt-bindings	dt-bindings: clocks: imx8mp: Add ID for usb suspend clock	2024-03-01 13:21:53 +01:00
keys	…
kunit	…
kvm	…
linux	PCI: Work around Intel I210 ROM BAR overlap defect	2024-04-10 16:18:38 +02:00
math-emu	…
media	…
memory	…
misc	…
net	bpf: Derive source IP addr via bpf_*_fib_lookup()	2024-03-06 14:38:50 +00:00
pcmcia	…
ras	…
rdma	…
scsi	…
soc	…
sound	…
target	…
trace	f2fs: multidevice: support direct IO	2024-03-26 18:21:32 -04:00
uapi	bpf: Derive source IP addr via bpf_*_fib_lookup()	2024-03-06 14:38:50 +00:00
vdso	…
video	…
xen	…