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This commit is contained in:
Florian Pose
2008-10-15 10:01:54 +00:00
parent 882a01c91f
commit 7c3d71913c
5 changed files with 43 additions and 19 deletions
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master/cdev.c
+26 -15
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@@ -50,18 +50,18 @@
/*****************************************************************************/
/** \cond */
int eccdev_open(struct inode *, struct file *);
int eccdev_release(struct inode *, struct file *);
long eccdev_ioctl(struct file *, unsigned int, unsigned long);
int eccdev_mmap(struct file *, struct vm_area_struct *);
static int eccdev_open(struct inode *, struct file *);
static int eccdev_release(struct inode *, struct file *);
static long eccdev_ioctl(struct file *, unsigned int, unsigned long);
static int eccdev_mmap(struct file *, struct vm_area_struct *);
static struct page *eccdev_vma_nopage(
struct vm_area_struct *, unsigned long, int *);
/*****************************************************************************/
/** File operation callbacks for the EtherCAT character device.
*/
static struct file_operations eccdev_fops = {
.owner = THIS_MODULE,
.open = eccdev_open,
@@ -70,21 +70,21 @@ static struct file_operations eccdev_fops = {
.mmap = eccdev_mmap
};
/** Callbacks for a virtual memory area retrieved with ecdevc_mmap().
*/
struct vm_operations_struct eccdev_vm_ops = {
.nopage = eccdev_vma_nopage
};
/** \endcond */
/*****************************************************************************/
/** Private data structure for file handles.
*/
typedef struct {
ec_cdev_t *cdev;
unsigned int requested;
uint8_t *process_data;
size_t process_data_size;
ec_cdev_t *cdev; /**< Character device. */
unsigned int requested; /**< Master wac requested via this file handle. */
uint8_t *process_data; /**< Total process data area. */
size_t process_data_size; /**< Size of the \a process_data. */
} ec_cdev_priv_t;
/*****************************************************************************/
@@ -2563,6 +2563,11 @@ long eccdev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
/*****************************************************************************/
/** Memory-map callback for the EtherCAT character device.
*
* The actual mapping will be done in the eccdev_vma_nopage() callback of the
* virtual memory area.
*/
int eccdev_mmap(
struct file *filp,
struct vm_area_struct *vma
@@ -2582,10 +2587,16 @@ int eccdev_mmap(
/*****************************************************************************/
/** Page fault callback for a virtual memory area.
*
* Called at the first access on a virtual-memory area retrieved with
* ecdev_mmap().
*/
struct page *eccdev_vma_nopage(
struct vm_area_struct *vma,
unsigned long address,
int *type
struct vm_area_struct *vma, /**< Virtual memory area initialized by
the kernel. */
unsigned long address, /**< Requested virtual address. */
int *type /**< Type output parameter. */
)
{
unsigned long offset;