ssize_t write_dev(struct file *filp, const char __user *ubuff, size_t size, loff_t *loff)
{
int no_qs, qun_siz, ret, nocsw, noctw, lv, i;
struct DEV *lsdev;
struct Qset *lqset;
lsdev = filp->private_data;
//char buff[] = ubuff;
#ifdef DEBUG
printk(KERN_INFO "BEGIN.....%s\n", __func__);
#endif
//if(!down(&lsdev->sem))
// return -ERESTARTSYS;
ret = i = nocsw = 0;
no_qs = size / (qset_size * quantum_size);/*Calculation of number of struct qset*/
if(size % (qset_size * quantum_size) )
no_qs++;
lsdev->qset = create_structqset(no_qs); /*Function for the creation of the struct Qset*/
create_qset(no_qs, lsdev->qset); /*Function for the create of the qset array*/
qun_siz = size / quantum_size;
if(size % quantum_size)
qun_siz++;
create_quantum(qun_siz, lsdev->qset);/*Function to create the quantum*/
noctw = size;
lqset = lsdev->qset;
for(lv = 0; lv < qun_siz; lv++)
{
if(noctw > quantum_size)
noctw = quantum_size;
ret = copy_from_user(lqset->data[i], ubuff + nocsw, noctw);
printk(KERN_INFO "nocsw ..%d noctw ..%d i = %d\n", nocsw, noctw, i);
#ifdef DEBUG
printk(KERN_INFO "Wrote on the device is %s\n", (char *)lqset->data[i]);
#endif
i++;
nocsw = nocsw + noctw - ret;
noctw = size - nocsw;
if(i == qset_size)
{
/*if(!lqset->next)
{
#ifdef DEBUG
printk(KERN_ERR "Next qset is not present ...%s\n", __func__);
#endif
goto OUT;
}*/
if(lqset->next != NULL)
{
i = 0;
lqset = lqset->next;
}
//else
// goto OUT;
}
}
#ifdef DEBUG
printk(KERN_INFO "END.....%s\n", __func__);
#endif
data_size = nocsw;
lsdev->data_size = nocsw;
#ifdef DEBUG
printk(KERN_INFO "._siz....%d\n", data_size);
#endif
filp->f_pos = nocsw;
// up(&lsdev->sem);
complete(&lsdev->comp);
return nocsw;
//OUT:
// data_size = nocsw;
// return nocsw;
}
ssize_t dev_write(struct file * filep, const char __user *ubuff, size_t count, loff_t * pos)
{
int noq,nosqs,ret,lv,notb;
int nobpq=0,loop;
int nobw=0;
struct Sculldev *lsculldev;
struct Scullqset *lscullqset;
#ifdef DEFINE
printk(KERN_INFO " begin : %s\n",__func__);
#endif
nosqs = noq = 0;
lsculldev=(struct Sculldev *)filep->private_data;
lsculldev->wcount=count;
noq = count/quantum_size;
if(count % quantum_size)
noq++;
#ifdef DEFINE
printk(KERN_INFO " noq = %d\n",noq);
#endif
nosqs = count/(quantum_size * qset_size);
if(count % (quantum_size * qset_size))
nosqs++;
#ifdef DEFINE
printk(KERN_INFO " nosqs = %d\n",nosqs);
#endif
lsculldev->scullqset=create_scullqset(nosqs);
if(!lsculldev->scullqset)
{
#ifdef DEFINE
printk(KERN_INFO " create_scullqset faliure\n");
#endif
}
else
{
#ifdef DEFINE
printk(KERN_INFO " create_scullqset successful\n");
#endif
}
lscullqset = lsculldev->scullqset;
ret=create_qset(lscullqset,nosqs );
if(ret<0)
{
#ifdef DEFINE
printk(KERN_INFO " create_qset faliure\n");
#endif
}
else
{
#ifdef DEFINE
printk(KERN_INFO " create_qset successful\n");
#endif
}
ret=create_quantum(lscullqset,noq);
if(ret<0)
{
#ifdef DEFINE
printk(KERN_INFO " create_quantum faliure\n");
#endif
}
else if(ret==noq)
{
#ifdef DEFINE
printk(KERN_INFO " create_quantum successful\n");
#endif
}
notb = count;
while(noq)
{
if(noq>quantum_size)
{
loop=quantum_size;
}
else
{
loop=noq;
}
for(lv=0;lv<loop;lv++)
{
if(notb > quantum_size)
nobpq=quantum_size;
else
nobpq = notb;
ret=copy_from_user(lscullqset->data[lv],ubuff+nobw,nobpq);
if(ret==0)
{
#ifdef DEFINE
printk(KERN_INFO " written succesfully %d %d %s\n",lv,ret,(char *)lscullqset->data[lv]);
#endif
}
else
{
#ifdef DEFINE
printk(KERN_INFO " remaining bytes are %d\n",ret);
#endif
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/* unsigned long status;
status=inb(BASE+1);
if(status==1)
{
outb(*((char*)(lscullqset->data[lv])),BASE);
outb(0,BASE+2);
}*/
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//outb(255,0x0378);
nobw=nobw+(nobpq-ret);
notb = notb -(nobpq + ret);
filep->f_pos = nobw;
#ifdef DEFINE
printk(KERN_INFO " file_position = %d\n",(int)filep->f_pos);
#endif
}
lscullqset=lscullqset->next;
noq=noq-loop;
#ifdef DEFINE
printk(KERN_INFO " noq= %d\n",noq);
#endif
}
#ifdef DEFINE
printk(KERN_INFO " end : %s\n",__func__);
#endif
return nobw;
}
