[Qemu-devel] [PATCH v5 00/16] Stream Patches

[Peter Crosthwaite]

Hi all. The Xilinx AXIEnet and DMA devices have two AXI stream connections
(control and data), only one of which is currently modelled (data). AXI stream
is modelled using the stream QOM interface described in stream.h. Unfortunately,
interfaces have no nice way of modelling multiple connections of the same type.
So to overcome this I created a secondary object which acts as a proxy for the
stream connection. Multiple connections can be implemented using multiple
proxies and stream masters link to the relevant proxy, rather than the ethernet
device itself. This Series changes AXI Enet and DMA to be connected as such.

Also changed the stream interface to implement flow control handshaking. This
is needed for the AXIEnet to be be able to implement the net can_receive() flow
control.

Patches 1-10 are low-impact cleanup of axienet/dma as per the current QOM
styling guidelines and can be cherry-picked off the front.

changed from v4:
resynchronized control flow stream API
reordered series for better consistency.
Folded patch 17 in 16 (app array length fix)
Fixed DMA tx path halted bit
changed from v3:
Changed from asynchronous flow control to synchronous (Edgar review)
changed from v2:
Reordered patches (from low impact -> high impact)
Added styling refactoring of AXIDMA
Added asynchronous patches
Removed dummy second stream connection patch (former patch 8)
Added (functional) second stream connection
changed from v1:
Removed former P1&2 (already merged)
Address Andreas review
Refactor axienet to be more QOM friendly.


Peter Crosthwaite (16):
  xilinx_axienet: typedef XilinxAXIEnet struct
  xilinx_axienet: Defined and use type cast macro
  xilinx_axienet: Register reset properly
  xilinx_axienet: converted init->realize
  xilinx_axidma: typedef XilinxAXIDMA struct
  xilinx_axidma: Defined and use type cast macro
  xilinx_axidma: Register reset properly
  xilinx_axidma: converted init->realize
  petalogix_ml605_mmu: Fix machine node attachment
  petalogix_ml605_mmu: Attach ethernet to machine
  xilinx_axienet: Create Proxy object for stream
  xilinx_axidma: Create Proxy object for stream
  xilinx_axidma: Fix rx/tx halted bit.
  stream: Add flow control API
  xilinx_axienet/dma: Implement rx path flow control
  stream: Remove app argument hack

 hw/microblaze/petalogix_ml605_mmu.c |   28 +++-
 hw/stream.c                         |   15 ++-
 hw/stream.h                         |   36 ++++-
 hw/xilinx.h                         |   21 ++-
 hw/xilinx_axidma.c                  |  261 +++++++++++++++++++++++++++--------
 hw/xilinx_axienet.c                 |  255 +++++++++++++++++++++++++++-------
 6 files changed, 483 insertions(+), 133 deletions(-)