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bb0bc49a1c
The new FUSE file system requires some DAX changes. * dax/fsdev: fix uninitialized kaddr in fsdev_dax_zero_page_range() * dax: export dax_dev_get() * dax: Add fs_dax_get() func to prepare dax for fs-dax usage * dax: Add dax_set_ops() for setting dax_operations at bind time * dax: Add dax_operations for use by fs-dax on fsdev dax * dax: Save the kva from memremap * dax: add fsdev.c driver for fs-dax on character dax * dax: Factor out dax_folio_reset_order() helper * dax: move dax_pgoff_to_phys from [drivers/dax/] device.c to bus.c -----BEGIN PGP SIGNATURE----- iIoEABYKADIWIQSgX9xt+GwmrJEQ+euebuN7TNx1MQUCaeeclRQcaXJhLndlaW55 QGludGVsLmNvbQAKCRCebuN7TNx1MZvgAQCTVqx7CbsR4qWpdXCreaetqJJUjwI5 iCvJJvdF1zLlngD9FAvnFv1/o/KktCnfZw1CAWadFrdOtyYDASYWS0mgGA8= =8YBs -----END PGP SIGNATURE----- Merge tag 'libnvdimm-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull dax updates from Ira Weiny: "The series adds DAX support required for the upcoming fuse/famfs file system.[1] The support here is required because famfs is backed by devdax rather than pmem. This all lays the groundwork for using shared memory as a file system" Link: https://lore.kernel.org/all/0100019d43e5f632-f5862a3e-361c-4b54-a9a6-96c242a8f17a-000000@email.amazonses.com/ [1] * tag 'libnvdimm-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: dax/fsdev: fix uninitialized kaddr in fsdev_dax_zero_page_range() dax: export dax_dev_get() dax: Add fs_dax_get() func to prepare dax for fs-dax usage dax: Add dax_set_ops() for setting dax_operations at bind time dax: Add dax_operations for use by fs-dax on fsdev dax dax: Save the kva from memremap dax: add fsdev.c driver for fs-dax on character dax dax: Factor out dax_folio_reset_order() helper dax: move dax_pgoff_to_phys from [drivers/dax/] device.c to bus.c
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
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#ifndef __DAX_BUS_H__
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#define __DAX_BUS_H__
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/range.h>
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#include <linux/workqueue.h>
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struct dev_dax;
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struct resource;
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struct dax_device;
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struct dax_region;
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/* dax bus specific ioresource flags */
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#define IORESOURCE_DAX_STATIC BIT(0)
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#define IORESOURCE_DAX_KMEM BIT(1)
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struct dax_region *alloc_dax_region(struct device *parent, int region_id,
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struct range *range, int target_node, unsigned int align,
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unsigned long flags);
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struct dev_dax_data {
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struct dax_region *dax_region;
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struct dev_pagemap *pgmap;
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resource_size_t size;
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int id;
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bool memmap_on_memory;
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};
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struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
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enum dax_driver_type {
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DAXDRV_KMEM_TYPE,
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DAXDRV_DEVICE_TYPE,
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DAXDRV_FSDEV_TYPE,
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};
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struct dax_device_driver {
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struct device_driver drv;
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struct list_head ids;
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enum dax_driver_type type;
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int (*probe)(struct dev_dax *dev);
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void (*remove)(struct dev_dax *dev);
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};
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#define to_dax_drv(__drv) container_of_const(__drv, struct dax_device_driver, drv)
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int __dax_driver_register(struct dax_device_driver *dax_drv,
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struct module *module, const char *mod_name);
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#define dax_driver_register(driver) \
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__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
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void dax_driver_unregister(struct dax_device_driver *dax_drv);
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void kill_dev_dax(struct dev_dax *dev_dax);
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bool static_dev_dax(struct dev_dax *dev_dax);
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struct hmem_platform_device {
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struct platform_device pdev;
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struct work_struct work;
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bool did_probe;
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};
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static inline struct hmem_platform_device *
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to_hmem_platform_device(struct platform_device *pdev)
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{
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return container_of(pdev, struct hmem_platform_device, pdev);
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}
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#if IS_ENABLED(CONFIG_DEV_DAX_HMEM)
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void dax_hmem_flush_work(void);
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#else
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static inline void dax_hmem_flush_work(void) { }
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#endif
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#define MODULE_ALIAS_DAX_DEVICE(type) \
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MODULE_ALIAS("dax:t" __stringify(type) "*")
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#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"
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#endif /* __DAX_BUS_H__ */
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