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device-dax: introduce 'struct dev_dax' typed-driver operations

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In preparation for introducing seed devices the dax-bus core needs to be
able to intercept ->probe() and ->remove() operations.  Towards that end
arrange for the bus and drivers to switch from raw 'struct device' driver
operations to 'struct dev_dax' typed operations.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jason Yan <yanaijie@huawei.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jia He <justin.he@arm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/160106113357.30709.4541750544799737855.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Williams 2020-10-13 16:50:08 -07:00 committed by Linus Torvalds
parent c2f3011ee6
commit f11cf813de
5 changed files with 35 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/dax/bus.c
View File

@ -135,10 +135,28 @@ static bool is_static(struct dax_region *dax_region)
return (dax_region->res.flags & IORESOURCE_DAX_STATIC) != 0;
}
static int dax_bus_probe(struct device *dev)
{
struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
struct dev_dax *dev_dax = to_dev_dax(dev);
return dax_drv->probe(dev_dax);
}
static int dax_bus_remove(struct device *dev)
{
struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
struct dev_dax *dev_dax = to_dev_dax(dev);
return dax_drv->remove(dev_dax);
}
static struct bus_type dax_bus_type = {
.name = "dax",
.uevent = dax_bus_uevent,
.match = dax_bus_match,
.probe = dax_bus_probe,
.remove = dax_bus_remove,
.drv_groups = dax_drv_groups,
};

4
drivers/dax/bus.h
View File

@ -38,6 +38,8 @@ struct dax_device_driver {
struct device_driver drv;
struct list_head ids;
int match_always;
int (*probe)(struct dev_dax *dev);
int (*remove)(struct dev_dax *dev);
};
int __dax_driver_register(struct dax_device_driver *dax_drv,
@ -48,7 +50,7 @@ void dax_driver_unregister(struct dax_device_driver *dax_drv);
void kill_dev_dax(struct dev_dax *dev_dax);
#if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
int dev_dax_probe(struct device *dev);
int dev_dax_probe(struct dev_dax *dev_dax);
#endif
/*

12
drivers/dax/device.c
View File

@ -392,11 +392,11 @@ static void dev_dax_kill(void *dev_dax)
kill_dev_dax(dev_dax);
}
int dev_dax_probe(struct device *dev)
int dev_dax_probe(struct dev_dax *dev_dax)
{
struct dev_dax *dev_dax = to_dev_dax(dev);
struct dax_device *dax_dev = dev_dax->dax_dev;
struct range *range = &dev_dax->range;
struct device *dev = &dev_dax->dev;
struct dev_pagemap *pgmap;
struct inode *inode;
struct cdev *cdev;
@ -446,17 +446,15 @@ int dev_dax_probe(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_dax_probe);
static int dev_dax_remove(struct device *dev)
static int dev_dax_remove(struct dev_dax *dev_dax)
{
/* all probe actions are unwound by devm */
return 0;
}
static struct dax_device_driver device_dax_driver = {
.drv = {
.probe = dev_dax_probe,
.remove = dev_dax_remove,
},
.probe = dev_dax_probe,
.remove = dev_dax_remove,
.match_always = 1,
};

18
drivers/dax/kmem.c
View File

@ -29,10 +29,10 @@ static struct range dax_kmem_range(struct dev_dax *dev_dax)
return range;
}
int dev_dax_kmem_probe(struct device *dev)
static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
{
struct dev_dax *dev_dax = to_dev_dax(dev);
struct range range = dax_kmem_range(dev_dax);
struct device *dev = &dev_dax->dev;
struct resource *res;
char *res_name;
int numa_node;
@ -88,12 +88,12 @@ int dev_dax_kmem_probe(struct device *dev)
}
#ifdef CONFIG_MEMORY_HOTREMOVE
static int dev_dax_kmem_remove(struct device *dev)
static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
{
struct dev_dax *dev_dax = to_dev_dax(dev);
int rc;
struct device *dev = &dev_dax->dev;
struct range range = dax_kmem_range(dev_dax);
const char *res_name = dev_get_drvdata(dev);
int rc;
/*
* We have one shot for removing memory, if some memory blocks were not
@ -116,7 +116,7 @@ static int dev_dax_kmem_remove(struct device *dev)
return 0;
}
#else
static int dev_dax_kmem_remove(struct device *dev)
static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
{
/*
* Without hotremove purposely leak the request_mem_region() for the
@ -131,10 +131,8 @@ static int dev_dax_kmem_remove(struct device *dev)
#endif /* CONFIG_MEMORY_HOTREMOVE */
static struct dax_device_driver device_dax_kmem_driver = {
.drv = {
.probe = dev_dax_kmem_probe,
.remove = dev_dax_kmem_remove,
},
.probe = dev_dax_kmem_probe,
.remove = dev_dax_kmem_remove,
};
static int __init dax_kmem_init(void)

2
drivers/dax/pmem/compat.c
View File

@ -22,7 +22,7 @@ static int dax_pmem_compat_probe(struct device *dev)
return -ENOMEM;
device_lock(&dev_dax->dev);
rc = dev_dax_probe(&dev_dax->dev);
rc = dev_dax_probe(dev_dax);
device_unlock(&dev_dax->dev);
devres_close_group(&dev_dax->dev, dev_dax);