Hi Vinod, Thanks very much for your reply. Best Regards, Peng >-----Original Message----- >From: Vinod Koul <vkoul@xxxxxxxxxx> >Sent: 2019年10月17日 12:11 >To: Peng Ma <peng.ma@xxxxxxx> >Cc: dan.j.williams@xxxxxxxxx; Leo Li <leoyang.li@xxxxxxx>; >linux-kernel@xxxxxxxxxxxxxxx; dmaengine@xxxxxxxxxxxxxxx >Subject: [EXT] Re: [V5 1/2] dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data >Path DMA Interface) support > >Caution: EXT Email > >On 30-09-19, 02:04, Peng Ma wrote: >> The MC(Management Complex) exports the DPDMAI(Data Path DMA >Interface) >> object as an interface to operate the DPAA2(Data Path Acceleration >> Architecture 2) qDMA Engine. The DPDMAI enables sending frame-based >> requests to qDMA and receiving back confirmation response on >> transaction completion, utilizing the DPAA2 QBMan(Queue Manager and >> Buffer Manager >> hardware) infrastructure. DPDMAI object provides up to two priorities >> for processing qDMA requests. >> The following list summarizes the DPDMAI main features and capabilities: >> 1. Supports up to two scheduling priorities for processing >> service requests. >> - Each DPDMAI transmit queue is mapped to one of two service >> priorities, allowing further prioritization in hardware between >> requests from different DPDMAI objects. >> 2. Supports up to two receive queues for incoming transaction >> completion confirmations. >> - Each DPDMAI receive queue is mapped to one of two receive >> priorities, allowing further prioritization between other >> interfaces when associating the DPDMAI receive queues to DPIO >> or DPCON(Data Path Concentrator) objects. >> 3. Supports different scheduling options for processing received >> packets: >> - Queues can be configured either in 'parked' mode (default), >> or attached to a DPIO object, or attached to DPCON object. >> 4. Allows interaction with one or more DPIO objects for >> dequeueing/enqueueing frame descriptors(FD) and for >> acquiring/releasing buffers. >> 5. Supports enable, disable, and reset operations. >> >> Add dpdmai to support some platforms with dpaa2 qdma engine. > >Applied both, thanks > >-- >~Vinod
