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authorDan Williams <dan.j.williams@intel.com>2017-07-14 13:54:50 -0700
committerDan Williams <dan.j.williams@intel.com>2019-01-06 21:24:46 -0800
commit753a0850e707e9a8c5861356222f9b9e4eba7945 (patch)
tree8c7e75e158b5debb5d31cdfce8e86d173e55084a /drivers/dax/device.c
parent93694f9630b0ed29cda61df58e480dcb34ef52fd (diff)
device-dax: Remove multi-resource infrastructure
The multi-resource implementation anticipated discontiguous sub-division support. That has not yet materialized, delete the infrastructure and related code. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax/device.c')
-rw-r--r--drivers/dax/device.c49
1 files changed, 8 insertions, 41 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 811c1015194c..db12e24b8005 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -151,11 +151,7 @@ static ssize_t size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dev_dax *dev_dax = to_dev_dax(dev);
- unsigned long long size = 0;
- int i;
-
- for (i = 0; i < dev_dax->num_resources; i++)
- size += resource_size(&dev_dax->res[i]);
+ unsigned long long size = resource_size(&dev_dax->region->res);
return sprintf(buf, "%llu\n", size);
}
@@ -224,21 +220,11 @@ static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma,
__weak phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
unsigned long size)
{
- struct resource *res;
- /* gcc-4.6.3-nolibc for i386 complains that this is uninitialized */
- phys_addr_t uninitialized_var(phys);
- int i;
-
- for (i = 0; i < dev_dax->num_resources; i++) {
- res = &dev_dax->res[i];
- phys = pgoff * PAGE_SIZE + res->start;
- if (phys >= res->start && phys <= res->end)
- break;
- pgoff -= PHYS_PFN(resource_size(res));
- }
+ struct resource *res = &dev_dax->region->res;
+ phys_addr_t phys;
- if (i < dev_dax->num_resources) {
- res = &dev_dax->res[i];
+ phys = pgoff * PAGE_SIZE + res->start;
+ if (phys >= res->start && phys <= res->end) {
if (phys + size - 1 <= res->end)
return phys;
}
@@ -608,8 +594,7 @@ static void unregister_dev_dax(void *dev)
put_device(dev);
}
-struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
- int id, struct resource *res, int count)
+struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, int id)
{
struct device *parent = dax_region->dev;
struct dax_device *dax_dev;
@@ -617,29 +602,12 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
struct inode *inode;
struct device *dev;
struct cdev *cdev;
- int rc, i;
+ int rc;
- if (!count)
- return ERR_PTR(-EINVAL);
-
- dev_dax = kzalloc(struct_size(dev_dax, res, count), GFP_KERNEL);
+ dev_dax = kzalloc(sizeof(*dev_dax), GFP_KERNEL);
if (!dev_dax)
return ERR_PTR(-ENOMEM);
- for (i = 0; i < count; i++) {
- if (!IS_ALIGNED(res[i].start, dax_region->align)
- || !IS_ALIGNED(resource_size(&res[i]),
- dax_region->align)) {
- rc = -EINVAL;
- break;
- }
- dev_dax->res[i].start = res[i].start;
- dev_dax->res[i].end = res[i].end;
- }
-
- if (i < count)
- goto err;
-
/*
* No 'host' or dax_operations since there is no access to this
* device outside of mmap of the resulting character device.
@@ -659,7 +627,6 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
cdev_init(cdev, &dax_fops);
cdev->owner = parent->driver->owner;
- dev_dax->num_resources = count;
dev_dax->dax_dev = dax_dev;
dev_dax->region = dax_region;
kref_get(&dax_region->kref);