> >> > [Jack Wang] > >> >It's the same, sas_ex_get_linkrate use DISCOVER response as linkrate. > >> But the function have problem, actually, the error statement is: > >> child->linkrate = min(parent_phy->linkrate, child->max_linkrate); > >> its mean like this: > >> child->linkrate = min(child_phy->linkrate, > >> max(parent->max_linkrate,child_phy->linkrate)); > >> and if parent->max_linkrate(3Gbps) is less than > child_phy->linkrate(6Gbps), > >> the statement will be change this: > >> child->linkrate = child_phy->linkrate, forget the parent linkrate. > >[Jack Wang] > >I don't think the statement below is error: > >child->linkrate = min(parent_phy->linkrate, child->max_linkrate); > >parent_phy->linkrate is came from sas_set_ex_phy which will set the linkrate > >to negotiated logical linkrate. For your eg: you topo like this: > >hba(3G)---expander1(6G)---expander2(6G): > > Yes, you can test like this. > >Then expander1's linkrate will set to 3G, and expander2's linkrate will set > >to 6G, that is correct. > yes > > But the connection rate will be 3G from hba to > >expander2. > How to configure the connection rate? > Now, MVSAS driver get 6G from sas_ex_get_linkrate function, and set linkrate > of OPEN address frame to the value. right? > > -- [Jack Wang] Connection rate is auto, link layer will insert deletable primitives to do rate matching (sas2r15 7.14). Yes, you should set the linkrate to that value . > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
