[PATCH v4 01/12] bbdev: add FFT window width member in driver info

[Nicolas Chautru <nicolas.chautru@intel.com>]

This exposes the width of each windowing shape being configured on
the device. This allows to distinguish different version of the
flexible pointwise windowing applied to the FFT and expose
this platform configuration to the application.
This also add the total number of windows supported in the capability.

The SRS processing chain
(https://doc.dpdk.org/guides/prog_guide/bbdev.html#bbdev-fft-operation)
includes a pointwise multiplication by time window whose shape width
needs to be exposed, notably for accurate SNR estimate.
Using that mechanism user application can retrieve information related
to what has been dynamically programmed on any bbdev device
supporting FFT windowing operation.

Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
---
 lib/bbdev/rte_bbdev.h    | 2 ++
 lib/bbdev/rte_bbdev_op.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/lib/bbdev/rte_bbdev.h b/lib/bbdev/rte_bbdev.h
index 2985c9f42b..d12e2e7fbc 100644
--- a/lib/bbdev/rte_bbdev.h
+++ b/lib/bbdev/rte_bbdev.h
@@ -349,6 +349,8 @@ struct rte_bbdev_driver_info {
 	const struct rte_bbdev_op_cap *capabilities;
 	/** Device cpu_flag requirements */
 	const enum rte_cpu_flag_t *cpu_flag_reqs;
+	/** FFT windowing width for 2048 FFT - size defined in capability. */
+	uint16_t *fft_window_width;
 };
 
 /** Macro used at end of bbdev PMD list */
diff --git a/lib/bbdev/rte_bbdev_op.h b/lib/bbdev/rte_bbdev_op.h
index 693baa8386..369ac331bf 100644
--- a/lib/bbdev/rte_bbdev_op.h
+++ b/lib/bbdev/rte_bbdev_op.h
@@ -905,6 +905,8 @@ struct rte_bbdev_op_cap_fft {
 	uint16_t num_buffers_src;
 	/** Num output code block buffers. */
 	uint16_t num_buffers_dst;
+	/** Number of FFT windows supported. */
+	uint16_t fft_windows_num;
 };
 
 /** List of the capabilities for the MLD */
-- 
2.34.1