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Kevin Bowling
6362e5068c
A host IRQ resource is not necessarily an LPC SIRQ selector. Let the frontend configure the route: ACPI uses the allocated _CRS interrupt and _SRS when present, preserving the firmware selector, while ISA supplies a separate, range-checked SIRQ. Match trigger and polarity to the host route and TPM capabilities, including opaque INTRNG resource mappings. Pass the firmware descriptor unchanged to _SRS; apply the x86 ISA polarity override only when computing the TPM mode. ISA chips without rising-edge support now poll instead of substituting a level mode for the host route. For both FIFO drivers, require a complete GetRandom transport response and a fresh DATA_AVAIL interrupt before selecting interrupt waits. Perform the test with polling before publishing the device, and repeat it after resume. During cold boot, defer the test and publication to an interrupt configuration hook so the IRQ grace wait can sleep and the handler can run. Drain the hook before teardown; failed deferred initialization remains unpublished and can be detached safely. Missing or failed routes release the handler and IRQ resource; TPM 1.2 handler-setup failure now also falls back to polling. Use monotonic deadlines for TPM 1.2 locality, status and burst polling. Keep lifecycle locality waits uninterruptible, propagate command signal errors, and terminate transfers when the burst wait expires instead of retrying a zero burst indefinitely. Check VALID with the requested status bits and retain bounded polling response retries. Interrupt waits retain their original single-timeout budget and error return. Arm only DATA_AVAIL before GO. Mask delivery on the first interrupt and before relinquishing locality, preventing idle and repeated-source storms. Bound interrupt sleeps so lost delivery can recover the current command through polling. Defer unexpected-source cleanup to a task that can acquire locality, and drain it before destroying driver locks. Preserve an unread TPM 1.2 response when quiescing an already owned locality. If the ithread cannot mask the TPM, yield for a tick with the host source masked so a level storm cannot starve the command owner or cleanup worker. Register INTR_SLEEPABLE | INTR_EXCL for both drivers, and reject firmware shared routes before installing a handler. Such routes now poll: FreeBSD does not allow sleepable shared handlers. Drain maskable events during firmware programming without letting them validate or reject the IRQ test. Retain the initial hardware-quiesce guarantee, including after _SRS: initialization fails when delivery cannot be disabled, and a later unrecoverable quiesce failure suspends command access. Known TPM 1.2 NOINTS quirks and the TPM 2.0 polling hint remain effective. Frontends without an explicit route method use polling. Tested by: jrm (tpm 1.2 tis) MFC after: 2 weeks Sponsored by: BBOX.io Differential Revision: https://reviews.freebsd.org/D59657
30 lines
554 B
Makefile
30 lines
554 B
Makefile
.PATH: ${SRCTOP}/sys/dev/tpm
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KMOD= tpm
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SRCS= bus_if.h device_if.h tpm_if.c tpm_if.h
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SRCS+= opt_acpi.h opt_tpm.h
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#Bus specific stuff.
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.if ${MACHINE_ARCH:Namd64:Ni386} == ""
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SRCS+= tpm.c
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SRCS+= tpm_acpi.c tpm_isa.c
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SRCS+= isa_if.h
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.endif
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#TPM 2.0
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SRCS+= tpm20.c tpm_tis_core.c
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.if defined(${OPT_FDT})
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SRCS+= tpm_spibus.c tpm_tis_spibus.c spibus_if.h
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.endif
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.if ${MACHINE_ARCH:Namd64:Ni386:Naarch64} == ""
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SRCS+= acpi_if.h
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SRCS+= tpm_tis_acpi.c
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SRCS+= tpm_acpi_subr.c
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SRCS+= tpm_crb.c
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SRCS+= tpm_bus.c
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CFLAGS+=-DDEV_ACPI
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.endif
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.include <bsd.kmod.mk>
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