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RISC-V interrupt controllers for wired interrupts are platform devices
and hence their driver will be probed late. Also, APLIC which is one
such interrupt controller can not be probed early since it needs MSI
services. This needs a probing order between the interrupt controller
driver and the device drivers.
_DEP is typically used to indicate such dependencies. However, the
dependency may be already available like GSI mapping. Hence, instead of
an explicit _DEP, architecture can find the implicit dependencies and
add to the dependency list.
For RISC-V, add the dependencies for below use cases.
1) For devices which has IRQ resource, find out the interrupt controller
using GSI number map and add the dependency.
2) For PCI host bridges:
a) If _PRT indicate PCI link devices, add dependency on the link
device.
b) If _PRT indicates GSI, find out the interrupt controller
using GSI number map and add the dependency.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-13-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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RISC-V has PLIC and APLIC in MADT as well as namespace devices.
Initialize the list of those structures using MADT and namespace devices
to create mapping between the ACPI handle and the GSI ranges. This will
be used later to add dependencies.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-12-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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On RISC-V platforms, the RINTC structures should be probed before any
other interrupt controller structures and IMSIC before APLIC. This order
is established by using MADT sub table types which are ordered in the
incremental order from the RINTC. So, add the architecture function for
RISC-V to reorder the interrupt controller probing as per the hierarchy
like below.
ACPI_MADT_TYPE_RINTC = 24,
ACPI_MADT_TYPE_IMSIC = 25,
ACPI_MADT_TYPE_APLIC = 26,
ACPI_MADT_TYPE_PLIC = 27
This means processing all RINTC structures (in the order of appearance
in MADT), followed by IMSIC strucutre and then all APLIC/PLIC
structures.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-11-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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