librtas_src/syscall_rmo.c File Reference

#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include "common.h"
#include "syscall.h"
#include "librtas.h"

Data Structures
struct	workarea_config
Defines
#define	MAX_PAGES   64
Functions
static int	read_kregion_bounds (struct region *kregion)
	Read the kernel region bounds for RMO memory.
static uint64_t	get_bits (short lobit, short hibit, uint64_t mask)
static void	set_bits (short lobit, short hibit, uint64_t value, uint64_t *mask)
static int	acquire_file_lock (off_t start, size_t size)
static int	release_file_lock (off_t start, size_t size)
static int	get_phys_region (size_t size, uint32_t *phys_addr)
static int	release_phys_region (uint32_t phys_addr, size_t size)
static int	init_workarea_config ()
static int	mmap_dev_mem (uint32_t phys_addr, size_t size, void **buf)
static int	munmap_dev_mem (void *buf, size_t size)
int	sc_interface_exists ()
int	sc_free_rmo_buffer (void *buf, uint32_t phys_addr, size_t size)
int	sc_get_rmo_buffer (size_t size, void **buf, uint32_t *phys_addr)
Variables
static const char *	rmo_filename = "rmo_buffer"
static const char *	devmem_path = "/dev/mem"
static const char *	lockfile_path = "/var/lock/LCK..librtas"
static struct workarea_config	wa_config

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Detailed Description

Copyright (C) 2005 IBM Corporation Common Public License Version 1.0 (see COPYRIGHT)

Author:

John Rose <johnrose@us.ibm.com>

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Define Documentation

#define MAX_PAGES   64

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Function Documentation

static int acquire_file_lock	(	off_t	start,
		size_t	size
	)			[static]

acquire_file_lock

Parameters:

	start
	size

Returns:

0 on success, !0 otherwise

static uint64_t get_bits	(	short	lobit,
		short	hibit,
		uint64_t	mask
	)			[inline, static]

get_bits

Parameters:

	lobit
	hibit
	mask

Returns:

0 on success, !0 otherwise

static int get_phys_region	(	size_t	size,
		uint32_t *	phys_addr
	)			[static]

get_phys_region

Parameters:

	size
	phys_addr

Returns:

0 on success, !0 otherwise

static int init_workarea_config

(

)

[static]

init_workarea_config

Returns:

0 on success, !0 otherwise

static int mmap_dev_mem	(	uint32_t	phys_addr,
		size_t	size,
		void **	buf
	)			[static]

mmap_dev_mem

Parameters:

	phys_addr
	size
	buf

Returns:

0 on success, !0 otherwise

static int munmap_dev_mem	(	void *	buf,
		size_t	size
	)			[static]

munmap_dev_mem

Parameters:

	buf
	size

Returns:

0 on success, !0 otherwise

static int read_kregion_bounds

(

struct region *

kregion

)

[static]

read_kregion_bounds

Parameters:

kregion

Returns:

0 on success, !0 otherwise

static int release_file_lock	(	off_t	start,
		size_t	size
	)			[static]

release_file_lock

Parameters:

	start
	size

Returns:

0 on success, !0 otherwise

static int release_phys_region	(	uint32_t	phys_addr,
		size_t	size
	)			[static]

release_phys_region

Parameters:

	phys_addr
	size

Returns:

0 on success, !0 otherwise

int sc_free_rmo_buffer	(	void *	buf,
		uint32_t	phys_addr,
		size_t	size
	)

sc_free_rmo_buffer

Parameters:

	buf	virtual address of mmap()'ed buffer
	phys_addr	physical address of low mem buffer
	size	size of buffer

Returns:

0 on success, !0 otherwise RTAS_FREE_ERR - Free called before get RTAS_IO_ASSERT - Unexpected I/O Error

int sc_get_rmo_buffer	(	size_t	size,
		void **	buf,
		uint32_t *	phys_addr
	)

sc_get_rmo_buffer

Parameters:

	size	Size of requested region. Must be a multiple of 4096.
	buf	Assigned to mmap'ed buffer of acquired region
	phys_addr	Assigned to physical address of acquired region

Returns:

0 on success, !0 otherwise RTAS_NO_MEM - Out of heap memory RTAS_NO_LOWMEM - Out of rmo memory RTAS_IO_ASSERT - Unexpected I/O Error

int sc_interface_exists

(

)

sc_interface_exists

Returns:

0 on success, !0 otherwise

static void set_bits	(	short	lobit,
		short	hibit,
		uint64_t	value,
		uint64_t *	mask
	)			[inline, static]

set_bits

Parameters:

	lobit
	hibit
	value
	mask

Returns:

0 on success, !0 otherwise

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Variable Documentation

const char* devmem_path = "/dev/mem" [static]

const char* lockfile_path = "/var/lock/LCK..librtas" [static]

const char* rmo_filename = "rmo_buffer" [static]

struct workarea_config wa_config [static]

Initial value:

 {
        .lockfile_fd = -1,
        .init_done = 0,
        .pages_map = 0ll,
}

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