[PATCH v1 22/31] net/ntnic: add base init and deinit the NT flow backend

[Serhii Iliushyk <sil-plv@napatech.com>]

From: Oleksandr Kolomeiets <okl-plv@napatech.com>

Add basic implementation of the NT flow backend  API

Signed-off-by: Oleksandr Kolomeiets <okl-plv@napatech.com>
---
 drivers/net/ntnic/include/flow_api.h          |  3 +
 drivers/net/ntnic/include/flow_api_engine.h   |  5 ++
 drivers/net/ntnic/include/hw_mod_backend.h    | 12 ++++
 drivers/net/ntnic/meson.build                 |  1 +
 drivers/net/ntnic/nthw/flow_api/flow_api.c    | 64 +++++++++++++++++++
 .../nthw/flow_api/hw_mod/hw_mod_backend.c     | 28 ++++++++
 6 files changed, 113 insertions(+)
 create mode 100644 drivers/net/ntnic/nthw/flow_api/hw_mod/hw_mod_backend.c

diff --git a/drivers/net/ntnic/include/flow_api.h b/drivers/net/ntnic/include/flow_api.h
index bad1f72868..b5194ffa8d 100644
--- a/drivers/net/ntnic/include/flow_api.h
+++ b/drivers/net/ntnic/include/flow_api.h
@@ -46,6 +46,9 @@ struct flow_eth_dev {
 
 /* registered NIC backends */
 struct flow_nic_dev {
+	uint8_t adapter_no;     /* physical adapter no in the host system */
+	uint16_t ports; /* number of in-ports addressable on this NIC */
+
 	struct hw_mod_resource_s res[RES_COUNT];/* raw NIC resource allocation table */
 	void *km_res_handle;
 	void *kcc_res_handle;
diff --git a/drivers/net/ntnic/include/flow_api_engine.h b/drivers/net/ntnic/include/flow_api_engine.h
index 724b68c3e8..db5e6fe09d 100644
--- a/drivers/net/ntnic/include/flow_api_engine.h
+++ b/drivers/net/ntnic/include/flow_api_engine.h
@@ -6,6 +6,11 @@
 #ifndef _FLOW_API_ENGINE_H_
 #define _FLOW_API_ENGINE_H_
 
+/*
+ * Resource management
+ */
+#define BIT_CONTAINER_8_ALIGN(x) (((x) + 7) / 8)
+
 /*
  * Resource management
  * These are free resources in FPGA
diff --git a/drivers/net/ntnic/include/hw_mod_backend.h b/drivers/net/ntnic/include/hw_mod_backend.h
index 3c6c15c896..f47153cbb6 100644
--- a/drivers/net/ntnic/include/hw_mod_backend.h
+++ b/drivers/net/ntnic/include/hw_mod_backend.h
@@ -278,6 +278,18 @@ struct flow_api_backend_ops {
 struct flow_api_backend_s {
 	void *be_dev;
 	const struct flow_api_backend_ops *iface;
+
+	/* NIC attributes */
+	unsigned int num_phy_ports;
+	unsigned int num_rx_ports;
+
+	/* flow filter resource capacities */
+	unsigned int max_categories;
+	unsigned int max_queues;
 };
 
+int flow_api_backend_init(struct flow_api_backend_s *dev, const struct flow_api_backend_ops *iface,
+	void *be_dev);
+int flow_api_backend_done(struct flow_api_backend_s *dev);
+
 #endif  /* _HW_MOD_BACKEND_H_ */
diff --git a/drivers/net/ntnic/meson.build b/drivers/net/ntnic/meson.build
index 15549e1c94..57d1ded2a7 100644
--- a/drivers/net/ntnic/meson.build
+++ b/drivers/net/ntnic/meson.build
@@ -48,6 +48,7 @@ sources = files(
         'nthw/flow_api/flow_filter.c',
         'nthw/flow_api/flow_kcc.c',
         'nthw/flow_api/flow_km.c',
+        'nthw/flow_api/hw_mod/hw_mod_backend.c',
         'nthw/flow_filter/flow_nthw_cat.c',
         'nthw/flow_filter/flow_nthw_csu.c',
         'nthw/flow_filter/flow_nthw_flm.c',
diff --git a/drivers/net/ntnic/nthw/flow_api/flow_api.c b/drivers/net/ntnic/nthw/flow_api/flow_api.c
index 92b8d083e0..4bab8983c9 100644
--- a/drivers/net/ntnic/nthw/flow_api/flow_api.c
+++ b/drivers/net/ntnic/nthw/flow_api/flow_api.c
@@ -175,6 +175,24 @@ int flow_delete_eth_dev(struct flow_eth_dev *eth_dev)
  * Flow backend creation function - register and initialize common backend API to FPA modules
  */
 
+static int init_resource_elements(struct flow_nic_dev *ndev, enum res_type_e res_type,
+	uint32_t count)
+{
+	assert(ndev->res[res_type].alloc_bm == NULL);
+	/* allocate bitmap and ref counter */
+	ndev->res[res_type].alloc_bm =
+		calloc(1, BIT_CONTAINER_8_ALIGN(count) + count * sizeof(uint32_t));
+
+	if (ndev->res[res_type].alloc_bm) {
+		ndev->res[res_type].ref =
+			(uint32_t *)&ndev->res[res_type].alloc_bm[BIT_CONTAINER_8_ALIGN(count)];
+		ndev->res[res_type].resource_count = count;
+		return 0;
+	}
+
+	return -1;
+}
+
 static void done_resource_elements(struct flow_nic_dev *ndev, enum res_type_e res_type)
 {
 	assert(ndev);
@@ -183,6 +201,14 @@ static void done_resource_elements(struct flow_nic_dev *ndev, enum res_type_e re
 		free(ndev->res[res_type].alloc_bm);
 }
 
+static void list_insert_flow_nic(struct flow_nic_dev *ndev)
+{
+	pthread_mutex_lock(&base_mtx);
+	ndev->next = dev_base;
+	dev_base = ndev;
+	pthread_mutex_unlock(&base_mtx);
+}
+
 static int list_remove_flow_nic(struct flow_nic_dev *ndev)
 {
 	pthread_mutex_lock(&base_mtx);
@@ -232,7 +258,44 @@ struct flow_nic_dev *flow_api_create(uint8_t adapter_no, const struct flow_api_b
 	 */
 	be_if->set_debug_mode(be_dev, FLOW_BACKEND_DEBUG_MODE_NONE);
 
+	if (flow_api_backend_init(&ndev->be, be_if, be_dev) != 0)
+		goto err_exit;
+
+	ndev->adapter_no = adapter_no;
+
+	ndev->ports = (uint16_t)((ndev->be.num_rx_ports > 256) ? 256 : ndev->be.num_rx_ports);
+
+	/*
+	 * Free resources in NIC must be managed by this module
+	 * Get resource sizes and create resource manager elements
+	 */
+	if (init_resource_elements(ndev, RES_QUEUE, ndev->be.max_queues))
+		goto err_exit;
+
+	if (init_resource_elements(ndev, RES_CAT_COT, ndev->be.max_categories))
+		goto err_exit;
+
+	if (init_resource_elements(ndev, RES_SLC_LR_RCP, ndev->be.max_categories))
+		goto err_exit;
+
+	/* may need IPF, COR */
+
+	/* check all defined has been initialized */
+	for (int i = 0; i < RES_COUNT; i++)
+		assert(ndev->res[i].alloc_bm);
+
+	pthread_mutex_init(&ndev->mtx, NULL);
+	list_insert_flow_nic(ndev);
+
 	return ndev;
+
+err_exit:
+
+	if (ndev)
+		flow_api_done(ndev);
+
+	NT_LOG(DBG, FILTER, "ERR: %s\n", __func__);
+	return NULL;
 }
 
 int flow_api_done(struct flow_nic_dev *ndev)
@@ -246,6 +309,7 @@ int flow_api_done(struct flow_nic_dev *ndev)
 		for (int i = 0; i < RES_COUNT; i++)
 			done_resource_elements(ndev, i);
 
+		flow_api_backend_done(&ndev->be);
 		list_remove_flow_nic(ndev);
 		free(ndev);
 	}
diff --git a/drivers/net/ntnic/nthw/flow_api/hw_mod/hw_mod_backend.c b/drivers/net/ntnic/nthw/flow_api/hw_mod/hw_mod_backend.c
new file mode 100644
index 0000000000..5966dc6e8c
--- /dev/null
+++ b/drivers/net/ntnic/nthw/flow_api/hw_mod/hw_mod_backend.c
@@ -0,0 +1,28 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2023 Napatech A/S
+ */
+
+#include "hw_mod_backend.h"
+
+int flow_api_backend_init(struct flow_api_backend_s *dev,
+	const struct flow_api_backend_ops *iface,
+	void *be_dev)
+{
+	assert(dev);
+	dev->iface = iface;
+	dev->be_dev = be_dev;
+	dev->num_phy_ports = iface->get_nb_phy_port(be_dev);
+	dev->num_rx_ports = iface->get_nb_rx_port(be_dev);
+	dev->max_categories = iface->get_nb_categories(be_dev);
+	dev->max_queues = iface->get_nb_queues(be_dev);
+
+	return 0;
+}
+
+int flow_api_backend_done(struct flow_api_backend_s *dev)
+{
+	(void)dev;
+
+	return 0;
+}
-- 
2.45.0