63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
// 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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unsigned long flags = IORESOURCE_DAX_KMEM;
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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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/*
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* @region_idle == true indicates that an administrative agent
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* wants to manipulate the range partitioning before the devices
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* are created, so do not send them to the dax_kmem driver by
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* default.
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*/
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if (region_idle)
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flags = 0;
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mri = dev->platform_data;
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dax_region = alloc_dax_region(dev, pdev->id, &mri->range,
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mri->target_node, PMD_SIZE, flags);
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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 : range_len(&mri->range),
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.memmap_on_memory = false,
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};
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return PTR_ERR_OR_ZERO(devm_create_dev_dax(&data));
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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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