diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2018-11-07 15:31:23 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-01-06 21:41:55 -0800 |
| commit | d200781ef237a354d918ceff5cee350d88a93d42 (patch) | |
| tree | afd53c6e25a57e31b8c0c8542e086bd50840bc9a /drivers/dax/bus.h | |
| parent | 89ec9f2cfa36cc5fca2fb445ed221bb9add7b536 (diff) | |
device-dax: Add support for a dax override driver
Introduce the 'new_id' concept for enabling a custom device-driver attach
policy for dax-bus drivers. The intended use is to have a mechanism for
hot-plugging device-dax ranges into the page allocator on-demand. With
this in place the default policy of using device-dax for performance
differentiated memory can be overridden by user-space policy that can
arrange for the memory range to be managed as 'System RAM' with
user-defined NUMA and other performance attributes.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax/bus.h')
| -rw-r--r-- | drivers/dax/bus.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/dax/bus.h b/drivers/dax/bus.h index e08e0c394983..395ab812367c 100644 --- a/drivers/dax/bus.h +++ b/drivers/dax/bus.h @@ -12,10 +12,18 @@ struct dax_region *alloc_dax_region(struct device *parent, int region_id, struct resource *res, unsigned int align, unsigned long flags); struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, int id, struct dev_pagemap *pgmap); -int __dax_driver_register(struct device_driver *drv, + +struct dax_device_driver { + struct device_driver drv; + struct list_head ids; + int match_always; +}; + +int __dax_driver_register(struct dax_device_driver *dax_drv, struct module *module, const char *mod_name); #define dax_driver_register(driver) \ __dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) +void dax_driver_unregister(struct dax_device_driver *dax_drv); void kill_dev_dax(struct dev_dax *dev_dax); /* |