[PATCH v2 2/7] baseband/acc: add FFT version in the VRB PMD

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

This allows to expose the flexible version of the pointwise
flexible multiplication being dynamically configured on the device.

Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
---
 drivers/baseband/acc/acc_common.h  |  1 +
 drivers/baseband/acc/rte_vrb_pmd.c | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/drivers/baseband/acc/acc_common.h b/drivers/baseband/acc/acc_common.h
index 5bb00746c3..df18506e75 100644
--- a/drivers/baseband/acc/acc_common.h
+++ b/drivers/baseband/acc/acc_common.h
@@ -512,6 +512,7 @@ struct acc_deq_intr_details {
 enum {
 	ACC_VF2PF_STATUS_REQUEST = 1,
 	ACC_VF2PF_USING_VF = 2,
+	ACC_VF2PF_LUT_VER_REQUEST = 3,
 };
 
 
diff --git a/drivers/baseband/acc/rte_vrb_pmd.c b/drivers/baseband/acc/rte_vrb_pmd.c
index 9e5a73c9c7..3c8f3409ed 100644
--- a/drivers/baseband/acc/rte_vrb_pmd.c
+++ b/drivers/baseband/acc/rte_vrb_pmd.c
@@ -298,6 +298,27 @@ vrb_device_status(struct rte_bbdev *dev)
 	return reg;
 }
 
+/* Request device FFT related version information. */
+static inline uint32_t
+vrb_device_fft_ver(struct rte_bbdev *dev)
+{
+	struct acc_device *d = dev->data->dev_private;
+	uint32_t reg, time_out = 0;
+
+	if (d->pf_device)
+		return 0;
+
+	vrb_vf2pf(d, ACC_VF2PF_LUT_VER_REQUEST);
+	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++;
+	}
+
+	return reg;
+}
+
 /* 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 +1121,7 @@ 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);
+	dev_info->fft_version = vrb_device_fft_ver(dev);
 
 	/* Exposed number of queues. */
 	dev_info->num_queues[RTE_BBDEV_OP_NONE] = 0;
-- 
2.34.1