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65 lines
1.5 KiB
65 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/platform_device.h> |
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#include <linux/memregion.h> |
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#include <linux/module.h> |
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#include <linux/pfn_t.h> |
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#include "../bus.h" |
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static bool region_idle; |
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module_param_named(region_idle, region_idle, bool, 0644); |
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static int dax_hmem_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct dax_region *dax_region; |
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struct memregion_info *mri; |
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struct dev_dax_data data; |
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struct dev_dax *dev_dax; |
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struct resource *res; |
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struct range range; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!res) |
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return -ENOMEM; |
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mri = dev->platform_data; |
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range.start = res->start; |
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range.end = res->end; |
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dax_region = alloc_dax_region(dev, pdev->id, &range, mri->target_node, |
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PMD_SIZE, 0); |
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if (!dax_region) |
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return -ENOMEM; |
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data = (struct dev_dax_data) { |
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.dax_region = dax_region, |
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.id = -1, |
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.size = region_idle ? 0 : resource_size(res), |
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}; |
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dev_dax = devm_create_dev_dax(&data); |
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if (IS_ERR(dev_dax)) |
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return PTR_ERR(dev_dax); |
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/* child dev_dax instances now own the lifetime of the dax_region */ |
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dax_region_put(dax_region); |
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return 0; |
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} |
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static int dax_hmem_remove(struct platform_device *pdev) |
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{ |
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/* devm handles teardown */ |
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return 0; |
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} |
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static struct platform_driver dax_hmem_driver = { |
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.probe = dax_hmem_probe, |
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.remove = dax_hmem_remove, |
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.driver = { |
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.name = "hmem", |
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}, |
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}; |
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module_platform_driver(dax_hmem_driver); |
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MODULE_ALIAS("platform:hmem*"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Intel Corporation");
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