Stream Driver (DMA Allocation)

NTDEV
1

Hi DriverDevlopers,

I am new to this driver group.I am very proud of this driver writing job.
Now i am implementing Stream class minidriver.I finished the Stream class
Minidriver.
It is working fine…But i am not able allocate the BUSMASTER DMA greater
than 400MB.
does anyone know,is ther any restrication in DMA buffer allocation.

If yes please give any other way to allocate Common buffer.

Note: I tried the individual DMA allocation,with out the help of minidriver
DMA.
But it is allocating only 100 KB buffer.in http: this method i
allocated the Adapter object and extra.

by

muthukumaran</http:>

2

This is another of those ‘already answered’ questions. Try searching before
asking again.

“Muthukumaran kumaran” wrote in message
news:xxxxx@ntdev…
Hi DriverDevlopers,

I am new to this driver group.I am very proud of this driver writing job.
Now i am implementing Stream class minidriver.I finished the Stream class
Minidriver.
It is working fine…But i am not able allocate the BUSMASTER DMA greater
than 400MB.
does anyone know,is ther any restrication in DMA buffer allocation.

If yes please give any other way to allocate Common buffer.

Note: I tried the individual DMA allocation,with out the help of minidriver
DMA.
But it is allocating only 100 KB buffer.in http: this method i
allocated the Adapter object and extra.

by

muthukumaran</http:>