Re: [PATCH v11 8/9] iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV

On Fri, Aug 16, 2024 at 10:41:06AM -0700, Nicolin Chen wrote:

On Fri, Aug 16, 2024 at 03:19:26PM +0100, Will Deacon wrote:

quoted

[...]

quoted

+struct arm_smmu_device *
+tegra241_cmdqv_acpi_dsdt_probe(struct arm_smmu_device *smmu,
+                            struct acpi_iort_node *node)
+{
+     struct resource *res;
+     int irq;
+
+     /* Keep the pointer smmu intact if !res */
+     res = tegra241_cmdqv_find_acpi_resource(smmu, node, &irq);
+     if (!res)
+             return smmu;

Given that this probing code will end up running on non-tegra hardware
when CONFIG_TEGRA241_CMDQV is enabled, please can you move the common
part into the main driver?

You mean moving the tegra241_cmdqv_acpi_dsdt_probe() into the main
driver? I think this v11 puts a function call int he header already.

Right. I basically want it so that !tegra folks don't have to open
the tegra-specific file to look at the code running on their SoC.

We should also running that code at all on implementations which _do_
advertise a distinct model number in IORT.

Will