linux.git/include/linux/net/intel/libie/controlq.h, branch master Linux kernel source tree libie: add bookkeeping support for control queue messages 2026-08-12T20:56:51+00:00 Phani R Burra phani.r.burra@intel.com 2026-06-25T16:01:59+00:00 b4ff4e626a7c7f10152c0895d51ff60123041e0e Small send control queue message buffers are managed and reused by libie itself, bigger send buffers are consumed. All are tracked with the unique transaction (Xn) ids until they receive response or time out. Responses can be received out of order, therefore transactions are stored in an array and tracked though a bitmap. Rx buffers utilize page_pool. Pre-allocated DMA memory is used where possible. It reduces the driver overhead in handling memory allocation/free and message timeouts. Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Phani R Burra <phani.r.burra@intel.com> Co-developed-by: Victor Raj <victor.raj@intel.com> Signed-off-by: Victor Raj <victor.raj@intel.com> Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com> Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com> Tested-by: Bharath R <bharath.r@intel.com> Tested-by: Samuel Salin <Samuel.salin@intel.com> Co-developed-by: Larysa Zaremba <larysa.zaremba@intel.com> Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> 
Small send control queue message buffers are managed and reused by
libie itself, bigger send buffers are consumed. All are tracked with
the unique transaction (Xn) ids until they receive response or time out.

Responses can be received out of order, therefore transactions are stored
in an array and tracked though a bitmap. Rx buffers utilize page_pool.

Pre-allocated DMA memory is used where possible. It reduces the driver
overhead in handling memory allocation/free and message timeouts.

Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Phani R Burra <phani.r.burra@intel.com>
Co-developed-by: Victor Raj <victor.raj@intel.com>
Signed-off-by: Victor Raj <victor.raj@intel.com>
Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Tested-by: Bharath R <bharath.r@intel.com>
Tested-by: Samuel Salin <Samuel.salin@intel.com>
Co-developed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
libie: add control queue support 2026-08-12T20:56:51+00:00 Phani R Burra phani.r.burra@intel.com 2026-06-25T16:01:58+00:00 caed480f29914c3ce2a83107f6e0da4f0c5974b3 Libie will now support control queue setup and configuration APIs. These are mainly used for mailbox communication between drivers and control plane. Make use of the libeth_rx page pool support for managing controlq buffers. Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Phani R Burra <phani.r.burra@intel.com> Co-developed-by: Victor Raj <victor.raj@intel.com> Signed-off-by: Victor Raj <victor.raj@intel.com> Co-developed-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com> Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com> Tested-by: Samuel Salin <Samuel.salin@intel.com> Tested-by: Bharath R <bharath.r@intel.com> Co-developed-by: Larysa Zaremba <larysa.zaremba@intel.com> Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> 
Libie will now support control queue setup and configuration APIs. These
are mainly used for mailbox communication between drivers and control
plane.

Make use of the libeth_rx page pool support for managing controlq buffers.

Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Phani R Burra <phani.r.burra@intel.com>
Co-developed-by: Victor Raj <victor.raj@intel.com>
Signed-off-by: Victor Raj <victor.raj@intel.com>
Co-developed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Tested-by: Samuel Salin <Samuel.salin@intel.com>
Tested-by: Bharath R <bharath.r@intel.com>
Co-developed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>