Can I launch a DMA operation in DPC routine ?

Tech-Archive recommends: Fix windows errors by optimizing your registry

I am writing a dirver of a PCI AD card. The design of the card is
common .It based on the PLX9054 , and there is a FIFO on the local
side, when the fifo is half full? it triges the interrupt , then the
dirver launch a DMA to get the data.

At first , I followed the Packet Based DMA method , and the upper
application writer told me their software can't responds enough
quickly. They ask me to setup a buffer in my dirver, then the
gathering data stored in the buffe firstly, when the upper application
need, it read the buffer.

If I adhibit this method , It is the driver , not the application
become the original DMA launcher. So , the dirver must perform a DMA
opertion automatically after each "half full interrupt" occurs. The
only way and the only palace I can imaging is the DPC where begin a
DMA Read opertion.

IS IT Workability? thanks.
.

Relevant Pages

  • Can I launch a DMA operation in DPC routine ?
    ... I am writing a dirver of a PCI AD card. ... At first, I followed the Packet Based DMA method, and the upper ... They ask me to setup a buffer in my dirver, ...
    (microsoft.public.development.device.drivers)
  • Re: Can I launch a DMA operation in DPC routine ?
    ... I might be tempted to have a "start dma" kernel thread of my own, ... and have the dpc release the event so that the ... They ask me to setup a buffer in my dirver, ...
    (microsoft.public.development.device.drivers)