};
/**
- * struct dax_dev - subdivision of a dax region
+ * struct dev_dax - instance data for a subdivision of a dax region
* @region - parent region
* @dev - device backing the character device
* @cdev - core chardev data
* @num_resources - number of physical address extents in this device
* @res - array of physical address ranges
*/
-struct dax_dev {
+struct dev_dax {
struct dax_region *region;
struct inode *inode;
struct device dev;
}
EXPORT_SYMBOL_GPL(alloc_dax_region);
-static struct dax_dev *to_dax_dev(struct device *dev)
+static struct dev_dax *to_dev_dax(struct device *dev)
{
- return container_of(dev, struct dax_dev, dev);
+ return container_of(dev, struct dev_dax, dev);
}
static ssize_t size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct dax_dev *dax_dev = to_dax_dev(dev);
+ struct dev_dax *dev_dax = to_dev_dax(dev);
unsigned long long size = 0;
int i;
- for (i = 0; i < dax_dev->num_resources; i++)
- size += resource_size(&dax_dev->res[i]);
+ for (i = 0; i < dev_dax->num_resources; i++)
+ size += resource_size(&dev_dax->res[i]);
return sprintf(buf, "%llu\n", size);
}
static DEVICE_ATTR_RO(size);
-static struct attribute *dax_device_attributes[] = {
+static struct attribute *dev_dax_attributes[] = {
&dev_attr_size.attr,
NULL,
};
-static const struct attribute_group dax_device_attribute_group = {
- .attrs = dax_device_attributes,
+static const struct attribute_group dev_dax_attribute_group = {
+ .attrs = dev_dax_attributes,
};
static const struct attribute_group *dax_attribute_groups[] = {
- &dax_device_attribute_group,
+ &dev_dax_attribute_group,
NULL,
};
-static int check_vma(struct dax_dev *dax_dev, struct vm_area_struct *vma,
+static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma,
const char *func)
{
- struct dax_region *dax_region = dax_dev->region;
- struct device *dev = &dax_dev->dev;
+ struct dax_region *dax_region = dev_dax->region;
+ struct device *dev = &dev_dax->dev;
unsigned long mask;
- if (!dax_dev->alive)
+ if (!dev_dax->alive)
return -ENXIO;
/* prevent private mappings from being established */
return 0;
}
-static phys_addr_t pgoff_to_phys(struct dax_dev *dax_dev, pgoff_t pgoff,
+static phys_addr_t pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff,
unsigned long size)
{
struct resource *res;
phys_addr_t phys;
int i;
- for (i = 0; i < dax_dev->num_resources; i++) {
- res = &dax_dev->res[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));
}
- if (i < dax_dev->num_resources) {
- res = &dax_dev->res[i];
+ if (i < dev_dax->num_resources) {
+ res = &dev_dax->res[i];
if (phys + size - 1 <= res->end)
return phys;
}
return -1;
}
-static int __dax_dev_pte_fault(struct dax_dev *dax_dev, struct vm_fault *vmf)
+static int __dev_dax_pte_fault(struct dev_dax *dev_dax, struct vm_fault *vmf)
{
- struct device *dev = &dax_dev->dev;
+ struct device *dev = &dev_dax->dev;
struct dax_region *dax_region;
int rc = VM_FAULT_SIGBUS;
phys_addr_t phys;
pfn_t pfn;
unsigned int fault_size = PAGE_SIZE;
- if (check_vma(dax_dev, vmf->vma, __func__))
+ if (check_vma(dev_dax, vmf->vma, __func__))
return VM_FAULT_SIGBUS;
- dax_region = dax_dev->region;
+ dax_region = dev_dax->region;
if (dax_region->align > PAGE_SIZE) {
dev_dbg(dev, "%s: alignment (%#x) > fault size (%#x)\n",
__func__, dax_region->align, fault_size);
if (fault_size != dax_region->align)
return VM_FAULT_SIGBUS;
- phys = pgoff_to_phys(dax_dev, vmf->pgoff, PAGE_SIZE);
+ phys = pgoff_to_phys(dev_dax, vmf->pgoff, PAGE_SIZE);
if (phys == -1) {
dev_dbg(dev, "%s: pgoff_to_phys(%#lx) failed\n", __func__,
vmf->pgoff);
return VM_FAULT_NOPAGE;
}
-static int __dax_dev_pmd_fault(struct dax_dev *dax_dev, struct vm_fault *vmf)
+static int __dev_dax_pmd_fault(struct dev_dax *dev_dax, struct vm_fault *vmf)
{
unsigned long pmd_addr = vmf->address & PMD_MASK;
- struct device *dev = &dax_dev->dev;
+ struct device *dev = &dev_dax->dev;
struct dax_region *dax_region;
phys_addr_t phys;
pgoff_t pgoff;
pfn_t pfn;
unsigned int fault_size = PMD_SIZE;
- if (check_vma(dax_dev, vmf->vma, __func__))
+ if (check_vma(dev_dax, vmf->vma, __func__))
return VM_FAULT_SIGBUS;
- dax_region = dax_dev->region;
+ dax_region = dev_dax->region;
if (dax_region->align > PMD_SIZE) {
dev_dbg(dev, "%s: alignment (%#x) > fault size (%#x)\n",
__func__, dax_region->align, fault_size);
return VM_FAULT_SIGBUS;
pgoff = linear_page_index(vmf->vma, pmd_addr);
- phys = pgoff_to_phys(dax_dev, pgoff, PMD_SIZE);
+ phys = pgoff_to_phys(dev_dax, pgoff, PMD_SIZE);
if (phys == -1) {
dev_dbg(dev, "%s: pgoff_to_phys(%#lx) failed\n", __func__,
pgoff);
}
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-static int __dax_dev_pud_fault(struct dax_dev *dax_dev, struct vm_fault *vmf)
+static int __dev_dax_pud_fault(struct dev_dax *dev_dax, struct vm_fault *vmf)
{
unsigned long pud_addr = vmf->address & PUD_MASK;
- struct device *dev = &dax_dev->dev;
+ struct device *dev = &dev_dax->dev;
struct dax_region *dax_region;
phys_addr_t phys;
pgoff_t pgoff;
unsigned int fault_size = PUD_SIZE;
- if (check_vma(dax_dev, vmf->vma, __func__))
+ if (check_vma(dev_dax, vmf->vma, __func__))
return VM_FAULT_SIGBUS;
- dax_region = dax_dev->region;
+ dax_region = dev_dax->region;
if (dax_region->align > PUD_SIZE) {
dev_dbg(dev, "%s: alignment (%#x) > fault size (%#x)\n",
__func__, dax_region->align, fault_size);
return VM_FAULT_SIGBUS;
pgoff = linear_page_index(vmf->vma, pud_addr);
- phys = pgoff_to_phys(dax_dev, pgoff, PUD_SIZE);
+ phys = pgoff_to_phys(dev_dax, pgoff, PUD_SIZE);
if (phys == -1) {
dev_dbg(dev, "%s: pgoff_to_phys(%#lx) failed\n", __func__,
pgoff);
vmf->flags & FAULT_FLAG_WRITE);
}
#else
-static int __dax_dev_pud_fault(struct dax_dev *dax_dev, struct vm_fault *vmf)
+static int __dev_dax_pud_fault(struct dev_dax *dev_dax, struct vm_fault *vmf)
{
return VM_FAULT_FALLBACK;
}
#endif /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
-static int dax_dev_huge_fault(struct vm_fault *vmf,
+static int dev_dax_huge_fault(struct vm_fault *vmf,
enum page_entry_size pe_size)
{
int rc, id;
struct file *filp = vmf->vma->vm_file;
- struct dax_dev *dax_dev = filp->private_data;
+ struct dev_dax *dev_dax = filp->private_data;
- dev_dbg(&dax_dev->dev, "%s: %s: %s (%#lx - %#lx) size = %d\n", __func__,
+ dev_dbg(&dev_dax->dev, "%s: %s: %s (%#lx - %#lx) size = %d\n", __func__,
current->comm, (vmf->flags & FAULT_FLAG_WRITE)
? "write" : "read",
vmf->vma->vm_start, vmf->vma->vm_end, pe_size);
id = srcu_read_lock(&dax_srcu);
switch (pe_size) {
case PE_SIZE_PTE:
- rc = __dax_dev_pte_fault(dax_dev, vmf);
+ rc = __dev_dax_pte_fault(dev_dax, vmf);
break;
case PE_SIZE_PMD:
- rc = __dax_dev_pmd_fault(dax_dev, vmf);
+ rc = __dev_dax_pmd_fault(dev_dax, vmf);
break;
case PE_SIZE_PUD:
- rc = __dax_dev_pud_fault(dax_dev, vmf);
+ rc = __dev_dax_pud_fault(dev_dax, vmf);
break;
default:
rc = VM_FAULT_SIGBUS;
return rc;
}
-static int dax_dev_fault(struct vm_fault *vmf)
+static int dev_dax_fault(struct vm_fault *vmf)
{
- return dax_dev_huge_fault(vmf, PE_SIZE_PTE);
+ return dev_dax_huge_fault(vmf, PE_SIZE_PTE);
}
-static const struct vm_operations_struct dax_dev_vm_ops = {
- .fault = dax_dev_fault,
- .huge_fault = dax_dev_huge_fault,
+static const struct vm_operations_struct dax_vm_ops = {
+ .fault = dev_dax_fault,
+ .huge_fault = dev_dax_huge_fault,
};
static int dax_mmap(struct file *filp, struct vm_area_struct *vma)
{
- struct dax_dev *dax_dev = filp->private_data;
+ struct dev_dax *dev_dax = filp->private_data;
int rc;
- dev_dbg(&dax_dev->dev, "%s\n", __func__);
+ dev_dbg(&dev_dax->dev, "%s\n", __func__);
- rc = check_vma(dax_dev, vma, __func__);
+ rc = check_vma(dev_dax, vma, __func__);
if (rc)
return rc;
- vma->vm_ops = &dax_dev_vm_ops;
+ vma->vm_ops = &dax_vm_ops;
vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
return 0;
}
unsigned long flags)
{
unsigned long off, off_end, off_align, len_align, addr_align, align;
- struct dax_dev *dax_dev = filp ? filp->private_data : NULL;
+ struct dev_dax *dev_dax = filp ? filp->private_data : NULL;
struct dax_region *dax_region;
- if (!dax_dev || addr)
+ if (!dev_dax || addr)
goto out;
- dax_region = dax_dev->region;
+ dax_region = dev_dax->region;
align = dax_region->align;
off = pgoff << PAGE_SHIFT;
off_end = off + len;
static int dax_open(struct inode *inode, struct file *filp)
{
- struct dax_dev *dax_dev;
+ struct dev_dax *dev_dax;
- dax_dev = container_of(inode->i_cdev, struct dax_dev, cdev);
- dev_dbg(&dax_dev->dev, "%s\n", __func__);
- inode->i_mapping = dax_dev->inode->i_mapping;
- inode->i_mapping->host = dax_dev->inode;
+ dev_dax = container_of(inode->i_cdev, struct dev_dax, cdev);
+ dev_dbg(&dev_dax->dev, "%s\n", __func__);
+ inode->i_mapping = dev_dax->inode->i_mapping;
+ inode->i_mapping->host = dev_dax->inode;
filp->f_mapping = inode->i_mapping;
- filp->private_data = dax_dev;
+ filp->private_data = dev_dax;
inode->i_flags = S_DAX;
return 0;
static int dax_release(struct inode *inode, struct file *filp)
{
- struct dax_dev *dax_dev = filp->private_data;
+ struct dev_dax *dev_dax = filp->private_data;
- dev_dbg(&dax_dev->dev, "%s\n", __func__);
+ dev_dbg(&dev_dax->dev, "%s\n", __func__);
return 0;
}
.mmap = dax_mmap,
};
-static void dax_dev_release(struct device *dev)
+static void dev_dax_release(struct device *dev)
{
- struct dax_dev *dax_dev = to_dax_dev(dev);
- struct dax_region *dax_region = dax_dev->region;
+ struct dev_dax *dev_dax = to_dev_dax(dev);
+ struct dax_region *dax_region = dev_dax->region;
- ida_simple_remove(&dax_region->ida, dax_dev->id);
+ ida_simple_remove(&dax_region->ida, dev_dax->id);
ida_simple_remove(&dax_minor_ida, MINOR(dev->devt));
dax_region_put(dax_region);
- iput(dax_dev->inode);
- kfree(dax_dev);
+ iput(dev_dax->inode);
+ kfree(dev_dax);
}
-static void kill_dax_dev(struct dax_dev *dax_dev)
+static void kill_dev_dax(struct dev_dax *dev_dax)
{
/*
- * Note, rcu is not protecting the liveness of dax_dev, rcu is
+ * Note, rcu is not protecting the liveness of dev_dax, rcu is
* ensuring that any fault handlers that might have seen
- * dax_dev->alive == true, have completed. Any fault handlers
+ * dev_dax->alive == true, have completed. Any fault handlers
* that start after synchronize_srcu() has started will abort
- * upon seeing dax_dev->alive == false.
+ * upon seeing dev_dax->alive == false.
*/
- dax_dev->alive = false;
+ dev_dax->alive = false;
synchronize_srcu(&dax_srcu);
- unmap_mapping_range(dax_dev->inode->i_mapping, 0, 0, 1);
+ unmap_mapping_range(dev_dax->inode->i_mapping, 0, 0, 1);
}
-static void unregister_dax_dev(void *dev)
+static void unregister_dev_dax(void *dev)
{
- struct dax_dev *dax_dev = to_dax_dev(dev);
+ struct dev_dax *dev_dax = to_dev_dax(dev);
dev_dbg(dev, "%s\n", __func__);
- kill_dax_dev(dax_dev);
- cdev_device_del(&dax_dev->cdev, dev);
+ kill_dev_dax(dev_dax);
+ cdev_device_del(&dev_dax->cdev, dev);
put_device(dev);
}
-struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region,
+struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
struct resource *res, int count)
{
struct device *parent = dax_region->dev;
- struct dax_dev *dax_dev;
+ struct dev_dax *dev_dax;
int rc = 0, minor, i;
struct device *dev;
struct cdev *cdev;
dev_t dev_t;
- dax_dev = kzalloc(sizeof(*dax_dev) + sizeof(*res) * count, GFP_KERNEL);
- if (!dax_dev)
+ dev_dax = kzalloc(sizeof(*dev_dax) + sizeof(*res) * count, GFP_KERNEL);
+ if (!dev_dax)
return ERR_PTR(-ENOMEM);
for (i = 0; i < count; i++) {
rc = -EINVAL;
break;
}
- dax_dev->res[i].start = res[i].start;
- dax_dev->res[i].end = res[i].end;
+ dev_dax->res[i].start = res[i].start;
+ dev_dax->res[i].end = res[i].end;
}
if (i < count)
goto err_id;
- dax_dev->id = ida_simple_get(&dax_region->ida, 0, 0, GFP_KERNEL);
- if (dax_dev->id < 0) {
- rc = dax_dev->id;
+ dev_dax->id = ida_simple_get(&dax_region->ida, 0, 0, GFP_KERNEL);
+ if (dev_dax->id < 0) {
+ rc = dev_dax->id;
goto err_id;
}
}
dev_t = MKDEV(MAJOR(dax_devt), minor);
- dev = &dax_dev->dev;
- dax_dev->inode = dax_inode_get(&dax_dev->cdev, dev_t);
- if (!dax_dev->inode) {
+ dev = &dev_dax->dev;
+ dev_dax->inode = dax_inode_get(&dev_dax->cdev, dev_t);
+ if (!dev_dax->inode) {
rc = -ENOMEM;
goto err_inode;
}
- /* from here on we're committed to teardown via dax_dev_release() */
+ /* from here on we're committed to teardown via dev_dax_release() */
device_initialize(dev);
- cdev = &dax_dev->cdev;
+ cdev = &dev_dax->cdev;
cdev_init(cdev, &dax_fops);
cdev->owner = parent->driver->owner;
- dax_dev->num_resources = count;
- dax_dev->alive = true;
- dax_dev->region = dax_region;
+ dev_dax->num_resources = count;
+ dev_dax->alive = true;
+ dev_dax->region = dax_region;
kref_get(&dax_region->kref);
dev->devt = dev_t;
dev->class = dax_class;
dev->parent = parent;
dev->groups = dax_attribute_groups;
- dev->release = dax_dev_release;
- dev_set_name(dev, "dax%d.%d", dax_region->id, dax_dev->id);
+ dev->release = dev_dax_release;
+ dev_set_name(dev, "dax%d.%d", dax_region->id, dev_dax->id);
rc = cdev_device_add(cdev, dev);
if (rc) {
- kill_dax_dev(dax_dev);
+ kill_dev_dax(dev_dax);
put_device(dev);
return ERR_PTR(rc);
}
- rc = devm_add_action_or_reset(dax_region->dev, unregister_dax_dev, dev);
+ rc = devm_add_action_or_reset(dax_region->dev, unregister_dev_dax, dev);
if (rc)
return ERR_PTR(rc);
- return dax_dev;
+ return dev_dax;
err_inode:
ida_simple_remove(&dax_minor_ida, minor);
err_minor:
- ida_simple_remove(&dax_region->ida, dax_dev->id);
+ ida_simple_remove(&dax_region->ida, dev_dax->id);
err_id:
- kfree(dax_dev);
+ kfree(dev_dax);
return ERR_PTR(rc);
}
-EXPORT_SYMBOL_GPL(devm_create_dax_dev);
+EXPORT_SYMBOL_GPL(devm_create_dev_dax);
static int __init dax_init(void)
{
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff