Hi Sinan, On Thu, Feb 04, 2016 at 11:34:31PM -0500, Sinan Kaya wrote: > The Qualcomm Technologies HIDMA device has been designed > to support virtualization technology. The driver has been > divided into two to follow the hardware design. > > 1. HIDMA Management driver > 2. HIDMA Channel driver > > Each HIDMA HW consists of multiple channels. These channels > share some set of common parameters. These parameters are > initialized by the management driver during power up. > Same management driver is used for monitoring the execution > of the channels. Management driver can change the performance > behavior dynamically such as bandwidth allocation and > prioritization in the future. > > The management driver is executed in host context and > is the main management entity for all channels provided by > the device. I'm not at all familiar with this kind of hardware. Once an entity (userspace or VM) has a HIDAM channel assigned via VFIO, how does it use it? Is it used in relation with another device to perform DMA on its behalf or is a HIDMA channel something that's useful on its own? Thanks, -Christoffer -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
