[Qemu-devel] [PATCH 00/10] SCSI scatter/gather support

[Paolo Bonzini]

Hi,

this is the version of SCSI scatter/gather based on the existing
DMA helpers infrastructure.

The infrastructure required a little update because I need to
know the residual amount of data upon short transfers.  To this
end, my choice was to make QEMUSGList mutable and track the
current position in there.  Any other ideas are welcome, the
reason for this choice is explained in patch 2.

The patches are quite self-contained, but they depend on the
changes I posted yesterday.

Patch 11 is the sample vmw_pvscsi device model that I used to
test the code.

Paolo Bonzini (11):
  dma-helpers: allow including from target-independent code
  dma-helpers: track position in the QEMUSGList
  dma-helpers: rewrite completion/cancellation
  dma-helpers: prepare for adding dma_buf_* functions
  dma-helpers: add dma_buf_read and dma_buf_write
  scsi: pass residual amount to command_complete
  scsi: add scatter/gather functionality
  scsi-disk: commonize iovec creation between reads and writes
  scsi-disk: lazily allocate bounce buffer
  scsi-disk: enable scatter/gather functionality
  sample pvscsi driver with s/g support

 Makefile.objs                      |    1 +
 cutils.c                           |    8 +-
 default-configs/i386-softmmu.mak   |    1 +
 default-configs/pci.mak            |    1 +
 default-configs/x86_64-softmmu.mak |    1 +
 dma-helpers.c                      |  231 +++++++--
 dma.h                              |   27 +-
 hw/esp.c                           |    5 +-
 hw/lsi53c895a.c                    |    4 +-
 hw/pci.h                           |    1 +
 hw/scsi-bus.c                      |   38 ++-
 hw/scsi-disk.c                     |  117 +++--
 hw/scsi.h                          |    7 +-
 hw/spapr_vscsi.c                   |    4 +-
 hw/usb-msd.c                       |    4 +-
 hw/vmw_pvscsi.c                    |  904 ++++++++++++++++++++++++++++++++++++
 hw/vmw_pvscsi.h                    |  389 ++++++++++++++++
 qemu-common.h                      |    1 +
 trace-events                       |   15 +
 19 files changed, 1646 insertions(+), 113 deletions(-)
 create mode 100644 hw/vmw_pvscsi.c
 create mode 100644 hw/vmw_pvscsi.h

-- 
1.7.6