ACPI/IORT: Add IORT named component memory address limits (10d8ab2c) · Commits · 戴 / test

drivers/acpi/arm64/iort.c

+37 −17

Original line number	Diff line number	Diff line
		@@ -680,6 +680,24 @@ static const struct iommu_ops iort_iommu_xlate(struct device dev,
		return ret ? NULL : ops;
		}

		static int nc_dma_get_range(struct device dev, u64 size)
		{
		struct acpi_iort_node *node;
		struct acpi_iort_named_component *ncomp;

		node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
		iort_match_node_callback, dev);
		if (!node)
		return -ENODEV;

		ncomp = (struct acpi_iort_named_component *)node->node_data;

		*size = ncomp->memory_address_limit >= 64 ? U64_MAX :
		1ULL<<ncomp->memory_address_limit;

		return 0;
		}

		/**
		* iort_dma_setup() - Set-up device DMA parameters.
		*
		@@ -708,8 +726,11 @@ void iort_dma_setup(struct device dev, u64 dma_addr, u64 *dma_size)

		size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);

		if (dev_is_pci(dev)) {
		if (dev_is_pci(dev))
		ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
		else
		ret = nc_dma_get_range(dev, &size);

		if (!ret) {
		msb = fls64(dmaaddr + size - 1);
		/*
		@@ -726,7 +747,6 @@ void iort_dma_setup(struct device dev, u64 dma_addr, u64 *dma_size)
		dev->coherent_dma_mask = mask;
		*dev->dma_mask = mask;
		}
		}

		*dma_addr = dmaaddr;
		*dma_size = size;