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E.g: If the user wants to create more than 64VD on a controller, it is not possible on current firmware/driver. New feature and requirement to support upto 256VD, firmware/driver/apps need changes. In addition to that, there must be a backward compatibility of the new driver with the older firmware and vice versa. RAID map is the interface between Driver and FW to fetch all required fields(attributes) for each Virtual Drives. In the earlier design driver was using the FW copy of RAID map where as in the new design the Driver will keep the RAID map copy of its own; on which it will operate for any raid map access in fast path. Local driver raid map copy will provide ease of access through out the code and provide generic interface for future FW raid map changes. For the backward compatibility driver will notify FW that it supports 256VD to the FW in driver capability field. Based on the controller properly returned by the FW, the Driver will know whether it supports 256VD or not and will copy the RAID map accordingly. At any given time, driver will always have old or new Raid map. Reviewed by : ambrisko MFC after : 2 weeks Sponsored by: AVAGO Technologies |
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mrsas_cam.c | ||
mrsas_fp.c | ||
mrsas_ioctl.c | ||
mrsas_ioctl.h | ||
mrsas.c | ||
mrsas.h |