include/linux/backing-dev.h


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#ifndef _LINUX_EISA_H
#define _LINUX_EISA_H

#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>

#define EISA_MAX_SLOTS 8

#define EISA_MAX_RESOURCES 4

/* A few EISA constants/offsets... */

#define EISA_DMA1_STATUS            8
#define EISA_INT1_CTRL           0x20
#define EISA_INT1_MASK           0x21
#define EISA_INT2_CTRL           0xA0
#define EISA_INT2_MASK           0xA1
#define EISA_DMA2_STATUS         0xD0
#define EISA_DMA2_WRITE_SINGLE   0xD4
#define EISA_EXT_NMI_RESET_CTRL 0x461
#define EISA_INT1_EDGE_LEVEL    0x4D0
#define EISA_INT2_EDGE_LEVEL    0x4D1
#define EISA_VENDOR_ID_OFFSET   0xC80
#define EISA_CONFIG_OFFSET      0xC84

#define EISA_CONFIG_ENABLED         1
#define EISA_CONFIG_FORCED          2

/* There is not much we can say about an EISA device, apart from
 * signature, slot number, and base address. dma_mask is set by
 * default to parent device mask..*/

struct eisa_device {
	struct eisa_device_id id;
	int                   slot;
	int                   state;
	unsigned long         base_addr;
	struct resource       res[EISA_MAX_RESOURCES];
	u64                   dma_mask;
	struct device         dev; /* generic device */
#ifdef CONFIG_EISA_NAMES
	char		      pretty_name[50];
#endif
};

#define to_eisa_device(n) container_of(n, struct eisa_device, dev)

static inline int eisa_get_region_index (void *addr)
{
	unsigned long x = (unsigned long) addr;

	x &= 0xc00;
	return (x >> 12);
}

struct eisa_driver {
	const struct eisa_device_id *id_table;
	struct device_driver         driver;
};

#define to_eisa_driver(drv) container_of(drv,struct eisa_driver, driver)

/* These external functions are only available when EISA support is enabled. */
#ifdef CONFIG_EISA

extern struct bus_type eisa_bus_type;
int eisa_driver_register (struct eisa_driver *edrv);
void eisa_driver_unregister (struct eisa_driver *edrv);

#else /* !CONFIG_EISA */

static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }

#endif /* !CONFIG_EISA */

/* Mimics pci.h... */
static inline void *eisa_get_drvdata (struct eisa_device *edev/*
 * include/linux/backing-dev.h
 *
 * low-level device information and state which is propagated up through
 * to high-level code.
 */

#ifndef _LINUX_BACKING_DEV_H
#define _LINUX_BACKING_DEV_H

#include <linux/percpu_counter.h>
#include <linux/log2.h>
#include <linux/proportions.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/writeback.h>
#include <asm/atomic.h>

struct page;
struct device;
struct dentry;

/*
 * Bits in backing_dev_info.state
 */
enum bdi_state {
	BDI_pending,		/* On its way to being activated */
	BDI_wb_alloc,		/* Default embedded wb allocated */
	BDI_async_congested,	/* The async (write) queue is getting full */
	BDI_sync_congested,	/* The sync queue is getting full */
	BDI_registered,		/* bdi_register() was done */
	BDI_writeback_running,	/* Writeback is in progress */
	BDI_unused,		/* Available bits start here */
};

typedef int (congested_fn)(void *, int);

enum bdi_stat_item {
	BDI_RECLAIMABLE,
	BDI_WRITEBACK,
	NR_BDI_STAT_ITEMS
};

#define BDI_STAT_BATCH (8*(1+ilog2(nr_