[PATCH v3 02/12] baseband/acc: add FFT window width in the VRB PMD

[Nicolas Chautru]

This allows to expose the FFT window width being introduced in
previous commit based on what is configured dynamically on the
device platform.

Signed-off-by: Nicolas Chautru <nicolas.chautru at intel.com>
---
 drivers/baseband/acc/acc_common.h  |  3 +++
 drivers/baseband/acc/rte_vrb_pmd.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/baseband/acc/acc_common.h b/drivers/baseband/acc/acc_common.h
index 5bb00746c3..7d24c644c0 100644
--- a/drivers/baseband/acc/acc_common.h
+++ b/drivers/baseband/acc/acc_common.h
@@ -512,6 +512,8 @@ struct acc_deq_intr_details {
 enum {
 	ACC_VF2PF_STATUS_REQUEST = 1,
 	ACC_VF2PF_USING_VF = 2,
+	ACC_VF2PF_LUT_VER_REQUEST = 3,
+	ACC_VF2PF_FFT_WIN_REQUEST = 4,
 };
 
 
@@ -558,6 +560,7 @@ struct acc_device {
 	queue_offset_fun_t queue_offset;  /* Device specific queue offset */
 	uint16_t num_qgroups;
 	uint16_t num_aqs;
+	uint16_t fft_window_width[RTE_BBDEV_MAX_FFT_WIN]; /* FFT windowing width. */
 };
 
 /* Structure associated with each queue. */
diff --git a/drivers/baseband/acc/rte_vrb_pmd.c b/drivers/baseband/acc/rte_vrb_pmd.c
index 9e5a73c9c7..c5a74bae11 100644
--- a/drivers/baseband/acc/rte_vrb_pmd.c
+++ b/drivers/baseband/acc/rte_vrb_pmd.c
@@ -298,6 +298,34 @@ vrb_device_status(struct rte_bbdev *dev)
 	return reg;
 }
 
+/* Request device FFT windowing information. */
+static inline void
+vrb_device_fft_win(struct rte_bbdev *dev, struct rte_bbdev_driver_info *dev_info)
+{
+	struct acc_device *d = dev->data->dev_private;
+	uint32_t reg, time_out = 0, win;
+
+	if (d->pf_device)
+		return;
+
+	/* Check from the device the first time. */
+	if (d->fft_window_width[0] == 0) {
+		for (win = 0; win < RTE_BBDEV_MAX_FFT_WIN; win++) {
+			vrb_vf2pf(d, ACC_VF2PF_FFT_WIN_REQUEST | win);
+			reg = acc_reg_read(d, d->reg_addr->pf2vf_doorbell);
+			while ((time_out < ACC_STATUS_TO) && (reg == RTE_BBDEV_DEV_NOSTATUS)) {
+				usleep(ACC_STATUS_WAIT); /*< Wait or VF->PF->VF Comms */
+				reg = acc_reg_read(d, d->reg_addr->pf2vf_doorbell);
+				time_out++;
+			}
+			d->fft_window_width[win] = reg;
+		}
+	}
+
+	for (win = 0; win < RTE_BBDEV_MAX_FFT_WIN; win++)
+		dev_info->fft_window_width[win] = d->fft_window_width[win];
+}
+
 /* Checks PF Info Ring to find the interrupt cause and handles it accordingly. */
 static inline void
 vrb_check_ir(struct acc_device *acc_dev)
@@ -1100,6 +1128,7 @@ vrb_dev_info_get(struct rte_bbdev *dev, struct rte_bbdev_driver_info *dev_info)
 	fetch_acc_config(dev);
 	/* Check the status of device. */
 	dev_info->device_status = vrb_device_status(dev);
+	vrb_device_fft_win(dev, dev_info);
 
 	/* Exposed number of queues. */
 	dev_info->num_queues[RTE_BBDEV_OP_NONE] = 0;
-- 
2.34.1