[PATCH v1 03/10] baseband/acc200: add info get function

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

Add support for info_get to allow to query the device.
Null capability exposed.

Signed-off-by: Nicolas Chautru <nicolas.chautru@intel.com>
---
 drivers/baseband/acc200/acc200_pmd.h     |   2 +
 drivers/baseband/acc200/rte_acc200_cfg.h |  94 ++++++++++++
 drivers/baseband/acc200/rte_acc200_pmd.c | 256 +++++++++++++++++++++++++++++++
 3 files changed, 352 insertions(+)
 create mode 100644 drivers/baseband/acc200/rte_acc200_cfg.h

diff --git a/drivers/baseband/acc200/acc200_pmd.h b/drivers/baseband/acc200/acc200_pmd.h
index b420524..91e0798 100644
--- a/drivers/baseband/acc200/acc200_pmd.h
+++ b/drivers/baseband/acc200/acc200_pmd.h
@@ -7,6 +7,7 @@
 
 #include "acc200_pf_enum.h"
 #include "acc200_vf_enum.h"
+#include "rte_acc200_cfg.h"
 
 /* Helper macro for logging */
 #define rte_bbdev_log(level, fmt, ...) \
@@ -619,6 +620,7 @@ struct acc200_registry_addr {
 struct acc200_device {
 	void *mmio_base;  /**< Base address of MMIO registers (BAR0) */
 	uint32_t ddr_size; /* Size in kB */
+	struct rte_acc200_conf acc200_conf; /* ACC200 Initial configuration */
 	bool pf_device; /**< True if this is a PF ACC200 device */
 	bool configured; /**< True if this ACC200 device is configured */
 };
diff --git a/drivers/baseband/acc200/rte_acc200_cfg.h b/drivers/baseband/acc200/rte_acc200_cfg.h
new file mode 100644
index 0000000..fcccfbf
--- /dev/null
+++ b/drivers/baseband/acc200/rte_acc200_cfg.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2021 Intel Corporation
+ */
+
+#ifndef _RTE_ACC200_CFG_H_
+#define _RTE_ACC200_CFG_H_
+
+/**
+ * @file rte_acc200_cfg.h
+ *
+ * Functions for configuring ACC200 HW, exposed directly to applications.
+ * Configuration related to encoding/decoding is done through the
+ * librte_bbdev library.
+ *
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/**< Number of Virtual Functions ACC200 supports */
+#define RTE_ACC200_NUM_VFS 16
+
+/**
+ * Definition of Queue Topology for ACC200 Configuration
+ * Some level of details is abstracted out to expose a clean interface
+ * given that comprehensive flexibility is not required
+ */
+struct rte_acc200_queue_topology {
+	/** Number of QGroups in incremental order of priority */
+	uint16_t num_qgroups;
+	/**
+	 * All QGroups have the same number of AQs here.
+	 * Note : Could be made a 16-array if more flexibility is really
+	 * required
+	 */
+	uint16_t num_aqs_per_groups;
+	/**
+	 * Depth of the AQs is the same of all QGroups here. Log2 Enum : 2^N
+	 * Note : Could be made a 16-array if more flexibility is really
+	 * required
+	 */
+	uint16_t aq_depth_log2;
+	/**
+	 * Index of the first Queue Group Index - assuming contiguity
+	 * Initialized as -1
+	 */
+	int8_t first_qgroup_index;
+};
+
+/**
+ * Definition of Arbitration related parameters for ACC200 Configuration
+ */
+struct rte_acc200_arbitration {
+	/** Default Weight for VF Fairness Arbitration */
+	uint16_t round_robin_weight;
+	uint32_t gbr_threshold1; /**< Guaranteed Bitrate Threshold 1 */
+	uint32_t gbr_threshold2; /**< Guaranteed Bitrate Threshold 2 */
+};
+
+/**
+ * Structure to pass ACC200 configuration.
+ * Note: all VF Bundles will have the same configuration.
+ */
+struct rte_acc200_conf {
+	bool pf_mode_en; /**< 1 if PF is used for dataplane, 0 for VFs */
+	/** 1 if input '1' bit is represented by a positive LLR value, 0 if '1'
+	 * bit is represented by a negative value.
+	 */
+	bool input_pos_llr_1_bit;
+	/** 1 if output '1' bit is represented by a positive value, 0 if '1'
+	 * bit is represented by a negative value.
+	 */
+	bool output_pos_llr_1_bit;
+	uint16_t num_vf_bundles; /**< Number of VF bundles to setup */
+	/** Queue topology for each operation type */
+	struct rte_acc200_queue_topology q_ul_4g;
+	struct rte_acc200_queue_topology q_dl_4g;
+	struct rte_acc200_queue_topology q_ul_5g;
+	struct rte_acc200_queue_topology q_dl_5g;
+	struct rte_acc200_queue_topology q_fft;
+	/** Arbitration configuration for each operation type */
+	struct rte_acc200_arbitration arb_ul_4g[RTE_ACC200_NUM_VFS];
+	struct rte_acc200_arbitration arb_dl_4g[RTE_ACC200_NUM_VFS];
+	struct rte_acc200_arbitration arb_ul_5g[RTE_ACC200_NUM_VFS];
+	struct rte_acc200_arbitration arb_dl_5g[RTE_ACC200_NUM_VFS];
+	struct rte_acc200_arbitration arb_fft[RTE_ACC200_NUM_VFS];
+};
+
+#endif /* _RTE_ACC200_CFG_H_ */
diff --git a/drivers/baseband/acc200/rte_acc200_pmd.c b/drivers/baseband/acc200/rte_acc200_pmd.c
index 70b6cc5..ce72654 100644
--- a/drivers/baseband/acc200/rte_acc200_pmd.c
+++ b/drivers/baseband/acc200/rte_acc200_pmd.c
@@ -29,6 +29,207 @@
 RTE_LOG_REGISTER_DEFAULT(acc200_logtype, NOTICE);
 #endif
 
+/* Read a register of a ACC200 device */
+static inline uint32_t
+acc200_reg_read(struct acc200_device *d, uint32_t offset)
+{
+
+	void *reg_addr = RTE_PTR_ADD(d->mmio_base, offset);
+	uint32_t ret = *((volatile uint32_t *)(reg_addr));
+	return rte_le_to_cpu_32(ret);
+}
+
+/* Calculate the offset of the enqueue register */
+static inline uint32_t
+queue_offset(bool pf_device, uint8_t vf_id, uint8_t qgrp_id, uint16_t aq_id)
+{
+	if (pf_device)
+		return ((vf_id << 12) + (qgrp_id << 7) + (aq_id << 3) +
+				HWPfQmgrIngressAq);
+	else
+		return ((qgrp_id << 7) + (aq_id << 3) +
+				HWVfQmgrIngressAq);
+}
+
+enum {UL_4G = 0, UL_5G, DL_4G, DL_5G, FFT, NUM_ACC};
+
+/* Return the queue topology for a Queue Group Index */
+static inline void
+qtopFromAcc(struct rte_acc200_queue_topology **qtop, int acc_enum,
+		struct rte_acc200_conf *acc200_conf)
+{
+	struct rte_acc200_queue_topology *p_qtop;
+	p_qtop = NULL;
+	switch (acc_enum) {
+	case UL_4G:
+		p_qtop = &(acc200_conf->q_ul_4g);
+		break;
+	case UL_5G:
+		p_qtop = &(acc200_conf->q_ul_5g);
+		break;
+	case DL_4G:
+		p_qtop = &(acc200_conf->q_dl_4g);
+		break;
+	case DL_5G:
+		p_qtop = &(acc200_conf->q_dl_5g);
+		break;
+	case FFT:
+		p_qtop = &(acc200_conf->q_fft);
+		break;
+	default:
+		/* NOTREACHED */
+		rte_bbdev_log(ERR, "Unexpected error evaluating qtopFromAcc %d",
+				acc_enum);
+		break;
+	}
+	*qtop = p_qtop;
+}
+
+static void
+initQTop(struct rte_acc200_conf *acc200_conf)
+{
+	acc200_conf->q_ul_4g.num_aqs_per_groups = 0;
+	acc200_conf->q_ul_4g.num_qgroups = 0;
+	acc200_conf->q_ul_4g.first_qgroup_index = -1;
+	acc200_conf->q_ul_5g.num_aqs_per_groups = 0;
+	acc200_conf->q_ul_5g.num_qgroups = 0;
+	acc200_conf->q_ul_5g.first_qgroup_index = -1;
+	acc200_conf->q_dl_4g.num_aqs_per_groups = 0;
+	acc200_conf->q_dl_4g.num_qgroups = 0;
+	acc200_conf->q_dl_4g.first_qgroup_index = -1;
+	acc200_conf->q_dl_5g.num_aqs_per_groups = 0;
+	acc200_conf->q_dl_5g.num_qgroups = 0;
+	acc200_conf->q_dl_5g.first_qgroup_index = -1;
+	acc200_conf->q_fft.num_aqs_per_groups = 0;
+	acc200_conf->q_fft.num_qgroups = 0;
+	acc200_conf->q_fft.first_qgroup_index = -1;
+}
+
+static inline void
+updateQtop(uint8_t acc, uint8_t qg, struct rte_acc200_conf *acc200_conf,
+		struct acc200_device *d) {
+	uint32_t reg;
+	struct rte_acc200_queue_topology *q_top = NULL;
+	qtopFromAcc(&q_top, acc, acc200_conf);
+	if (unlikely(q_top == NULL))
+		return;
+	uint16_t aq;
+	q_top->num_qgroups++;
+	if (q_top->first_qgroup_index == -1) {
+		q_top->first_qgroup_index = qg;
+		/* Can be optimized to assume all are enabled by default */
+		reg = acc200_reg_read(d, queue_offset(d->pf_device,
+				0, qg, ACC200_NUM_AQS - 1));
+		if (reg & ACC200_QUEUE_ENABLE) {
+			q_top->num_aqs_per_groups = ACC200_NUM_AQS;
+			return;
+		}
+		q_top->num_aqs_per_groups = 0;
+		for (aq = 0; aq < ACC200_NUM_AQS; aq++) {
+			reg = acc200_reg_read(d, queue_offset(d->pf_device,
+					0, qg, aq));
+			if (reg & ACC200_QUEUE_ENABLE)
+				q_top->num_aqs_per_groups++;
+		}
+	}
+}
+
+/* Fetch configuration enabled for the PF/VF using MMIO Read (slow) */
+static inline void
+fetch_acc200_config(struct rte_bbdev *dev)
+{
+	struct acc200_device *d = dev->data->dev_private;
+	struct rte_acc200_conf *acc200_conf = &d->acc200_conf;
+	const struct acc200_registry_addr *reg_addr;
+	uint8_t acc, qg;
+	uint32_t reg_aq, reg_len0, reg_len1, reg0, reg1;
+	uint32_t reg_mode, idx;
+
+	/* No need to retrieve the configuration is already done */
+	if (d->configured)
+		return;
+
+	/* Choose correct registry addresses for the device type */
+	if (d->pf_device)
+		reg_addr = &pf_reg_addr;
+	else
+		reg_addr = &vf_reg_addr;
+
+	d->ddr_size = 0;
+
+	/* Single VF Bundle by VF */
+	acc200_conf->num_vf_bundles = 1;
+	initQTop(acc200_conf);
+
+	struct rte_acc200_queue_topology *q_top = NULL;
+	int qman_func_id[ACC200_NUM_ACCS] = {ACC200_ACCMAP_0, ACC200_ACCMAP_1,
+			ACC200_ACCMAP_2, ACC200_ACCMAP_3, ACC200_ACCMAP_4};
+	reg0 = acc200_reg_read(d, reg_addr->qman_group_func);
+	reg1 = acc200_reg_read(d, reg_addr->qman_group_func + 4);
+	for (qg = 0; qg < ACC200_NUM_QGRPS; qg++) {
+		reg_aq = acc200_reg_read(d,
+				queue_offset(d->pf_device, 0, qg, 0));
+		if (reg_aq & ACC200_QUEUE_ENABLE) {
+			/* printf("Qg enabled %d %x\n", qg, reg_aq); */
+			if (qg < ACC200_NUM_QGRPS_PER_WORD)
+				idx = (reg0 >> (qg * 4)) & 0x7;
+			else
+				idx = (reg1 >> ((qg -
+					ACC200_NUM_QGRPS_PER_WORD) * 4)) & 0x7;
+			if (idx < ACC200_NUM_ACCS) {
+				acc = qman_func_id[idx];
+				updateQtop(acc, qg, acc200_conf, d);
+			}
+		}
+	}
+
+	/* Check the depth of the AQs*/
+	reg_len0 = acc200_reg_read(d, reg_addr->depth_log0_offset);
+	reg_len1 = acc200_reg_read(d, reg_addr->depth_log1_offset);
+	for (acc = 0; acc < NUM_ACC; acc++) {
+		qtopFromAcc(&q_top, acc, acc200_conf);
+		if (q_top->first_qgroup_index < ACC200_NUM_QGRPS_PER_WORD)
+			q_top->aq_depth_log2 = (reg_len0 >>
+					(q_top->first_qgroup_index * 4))
+					& 0xF;
+		else
+			q_top->aq_depth_log2 = (reg_len1 >>
+					((q_top->first_qgroup_index -
+					ACC200_NUM_QGRPS_PER_WORD) * 4))
+					& 0xF;
+	}
+
+	/* Read PF mode */
+	if (d->pf_device) {
+		reg_mode = acc200_reg_read(d, HWPfHiPfMode);
+		acc200_conf->pf_mode_en = (reg_mode == ACC200_PF_VAL) ? 1 : 0;
+	} else {
+		reg_mode = acc200_reg_read(d, reg_addr->hi_mode);
+		acc200_conf->pf_mode_en = reg_mode & 1;
+	}
+
+	rte_bbdev_log_debug(
+			"%s Config LLR SIGN IN/OUT %s %s QG %u %u %u %u %u AQ %u %u %u %u %u Len %u %u %u %u %u\n",
+			(d->pf_device) ? "PF" : "VF",
+			(acc200_conf->input_pos_llr_1_bit) ? "POS" : "NEG",
+			(acc200_conf->output_pos_llr_1_bit) ? "POS" : "NEG",
+			acc200_conf->q_ul_4g.num_qgroups,
+			acc200_conf->q_dl_4g.num_qgroups,
+			acc200_conf->q_ul_5g.num_qgroups,
+			acc200_conf->q_dl_5g.num_qgroups,
+			acc200_conf->q_fft.num_qgroups,
+			acc200_conf->q_ul_4g.num_aqs_per_groups,
+			acc200_conf->q_dl_4g.num_aqs_per_groups,
+			acc200_conf->q_ul_5g.num_aqs_per_groups,
+			acc200_conf->q_dl_5g.num_aqs_per_groups,
+			acc200_conf->q_fft.num_aqs_per_groups,
+			acc200_conf->q_ul_4g.aq_depth_log2,
+			acc200_conf->q_dl_4g.aq_depth_log2,
+			acc200_conf->q_ul_5g.aq_depth_log2,
+			acc200_conf->q_dl_5g.aq_depth_log2,
+			acc200_conf->q_fft.aq_depth_log2);
+}
+
 /* Free memory used for software rings */
 static int
 acc200_dev_close(struct rte_bbdev *dev)
@@ -39,9 +240,57 @@
 	return 0;
 }
 
+/* Get ACC200 device info */
+static void
+acc200_dev_info_get(struct rte_bbdev *dev,
+		struct rte_bbdev_driver_info *dev_info)
+{
+	struct acc200_device *d = dev->data->dev_private;
+	int i;
+	static const struct rte_bbdev_op_cap bbdev_capabilities[] = {
+		RTE_BBDEV_END_OF_CAPABILITIES_LIST()
+	};
+
+	static struct rte_bbdev_queue_conf default_queue_conf;
+	default_queue_conf.socket = dev->data->socket_id;
+	default_queue_conf.queue_size = ACC200_MAX_QUEUE_DEPTH;
+
+	dev_info->driver_name = dev->device->driver->name;
+
+	/* Read and save the populated config from ACC200 registers */
+	fetch_acc200_config(dev);
+
+	/* Exposed number of queues */
+	dev_info->num_queues[RTE_BBDEV_OP_NONE] = 0;
+	dev_info->num_queues[RTE_BBDEV_OP_TURBO_DEC] = 0;
+	dev_info->num_queues[RTE_BBDEV_OP_TURBO_ENC] = 0;
+	dev_info->num_queues[RTE_BBDEV_OP_LDPC_DEC] = 0;
+	dev_info->num_queues[RTE_BBDEV_OP_LDPC_ENC] = 0;
+	dev_info->num_queues[RTE_BBDEV_OP_FFT] = 0;
+	dev_info->queue_priority[RTE_BBDEV_OP_TURBO_DEC] = 0;
+	dev_info->queue_priority[RTE_BBDEV_OP_TURBO_ENC] = 0;
+	dev_info->queue_priority[RTE_BBDEV_OP_LDPC_DEC] = 0;
+	dev_info->queue_priority[RTE_BBDEV_OP_LDPC_ENC] = 0;
+	dev_info->queue_priority[RTE_BBDEV_OP_FFT] = 0;
+	dev_info->max_num_queues = 0;
+	for (i = RTE_BBDEV_OP_NONE; i <= RTE_BBDEV_OP_FFT; i++)
+		dev_info->max_num_queues += dev_info->num_queues[i];
+	dev_info->queue_size_lim = ACC200_MAX_QUEUE_DEPTH;
+	dev_info->hardware_accelerated = true;
+	dev_info->max_dl_queue_priority =
+			d->acc200_conf.q_dl_4g.num_qgroups - 1;
+	dev_info->max_ul_queue_priority =
+			d->acc200_conf.q_ul_4g.num_qgroups - 1;
+	dev_info->default_queue_conf = default_queue_conf;
+	dev_info->cpu_flag_reqs = NULL;
+	dev_info->min_alignment = 1;
+	dev_info->capabilities = bbdev_capabilities;
+	dev_info->harq_buffer_size = 0;
+}
 
 static const struct rte_bbdev_ops acc200_bbdev_ops = {
 	.close = acc200_dev_close,
+	.info_get = acc200_dev_info_get,
 };
 
 /* ACC200 PCI PF address map */
@@ -60,6 +309,13 @@
 	{.device_id = 0},
 };
 
+/* Read flag value 0/1 from bitmap */
+static inline bool
+check_bit(uint32_t bitmap, uint32_t bitmask)
+{
+	return bitmap & bitmask;
+}
+
 /* Initialization Function */
 static void
 acc200_bbdev_init(struct rte_bbdev *dev, struct rte_pci_driver *drv)
-- 
1.8.3.1