windows - Equivalent API to MmGetPhysicalAddress in WEC7 -


i porting windows 7 network driver code wec7. got stuck api mmgetphysicaladdress. didn't find equivalent api in wec7. can proceed further..

pnet_buffer os_buf = net_buffer_list_first_nb((pnet_buffer_list)skb->wb_os_buf);     pmdl pmdl = net_buffer_first_mdl(os_buf);     ulong length = 0;     int8_t *data = null;         physical_address addr;     ndisquerymdl(pmdl, &data, &length, normalpagepriority);           addr = mmgetphysicaladdress(data);  skb->wb_mapped_paddr_lo[0] = addr.lowpart + net_buffer_data_offset(os_buf);

how can port last line of above code wec7?

thanks.

mmgetphysicaladdress not available in windows ce, don't need anyway.

somewhere in initializehandlerex callback, driver should calling ndismallocatesharedmemory allocate rx/tx buffers.

ndismallocatesharedmemory returns both virtual , physical address of allocated buffer, can keep physical address around, , there won't need request os.

normally physical address kept in driver-specific, per-buffer structure along virtual buffer address.

you can find sample implementation of in c:\wince700\public\common\oak\drivers\netcard\e100bex\60. in mp_init.c, notice how nicallocadaptermemory calls ndismallocatesharedmemory , stores physical address of each buffer in pmptxbuf->bufferpa.


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