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Diffstat (limited to 'arch/powerpc/sysdev/axonram.c')
-rw-r--r--arch/powerpc/sysdev/axonram.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index f523ac883150..a7fe5fee744f 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -25,6 +25,7 @@
#include <linux/bio.h>
#include <linux/blkdev.h>
+#include <linux/dax.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fs.h>
@@ -62,6 +63,7 @@ static int azfs_major, azfs_minor;
struct axon_ram_bank {
struct platform_device *device;
struct gendisk *disk;
+ struct dax_device *dax_dev;
unsigned int irq_id;
unsigned long ph_addr;
unsigned long io_addr;
@@ -137,25 +139,32 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
return BLK_QC_T_NONE;
}
-/**
- * axon_ram_direct_access - direct_access() method for block device
- * @device, @sector, @data: see block_device_operations method
- */
+static const struct block_device_operations axon_ram_devops = {
+ .owner = THIS_MODULE,
+};
+
static long
-axon_ram_direct_access(struct block_device *device, sector_t sector,
- void **kaddr, pfn_t *pfn, long size)
+__axon_ram_direct_access(struct axon_ram_bank *bank, pgoff_t pgoff, long nr_pages,
+ void **kaddr, pfn_t *pfn)
{
- struct axon_ram_bank *bank = device->bd_disk->private_data;
- loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT;
+ resource_size_t offset = pgoff * PAGE_SIZE;
*kaddr = (void *) bank->io_addr + offset;
*pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV);
- return bank->size - offset;
+ return (bank->size - offset) / PAGE_SIZE;
}
-static const struct block_device_operations axon_ram_devops = {
- .owner = THIS_MODULE,
- .direct_access = axon_ram_direct_access
+static long
+axon_ram_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages,
+ void **kaddr, pfn_t *pfn)
+{
+ struct axon_ram_bank *bank = dax_get_private(dax_dev);
+
+ return __axon_ram_direct_access(bank, pgoff, nr_pages, kaddr, pfn);
+}
+
+static const struct dax_operations axon_ram_dax_ops = {
+ .direct_access = axon_ram_dax_direct_access,
};
/**
@@ -219,6 +228,7 @@ static int axon_ram_probe(struct platform_device *device)
goto failed;
}
+
bank->disk->major = azfs_major;
bank->disk->first_minor = azfs_minor;
bank->disk->fops = &axon_ram_devops;
@@ -227,6 +237,13 @@ static int axon_ram_probe(struct platform_device *device)
sprintf(bank->disk->disk_name, "%s%d",
AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
+ bank->dax_dev = alloc_dax(bank, bank->disk->disk_name,
+ &axon_ram_dax_ops);
+ if (!bank->dax_dev) {
+ rc = -ENOMEM;
+ goto failed;
+ }
+
bank->disk->queue = blk_alloc_queue(GFP_KERNEL);
if (bank->disk->queue == NULL) {
dev_err(&device->dev, "Cannot register disk queue\n");
@@ -278,6 +295,8 @@ failed:
del_gendisk(bank->disk);
put_disk(bank->disk);
}
+ kill_dax(bank->dax_dev);
+ put_dax(bank->dax_dev);
device->dev.platform_data = NULL;
if (bank->io_addr != 0)
iounmap((void __iomem *) bank->io_addr);
@@ -300,6 +319,8 @@ axon_ram_remove(struct platform_device *device)
device_remove_file(&device->dev, &dev_attr_ecc);
free_irq(bank->irq_id, device);
+ kill_dax(bank->dax_dev);
+ put_dax(bank->dax_dev);
del_gendisk(bank->disk);
put_disk(bank->disk);
iounmap((void __iomem *) bank->io_addr);