[PATCH v2 39/73] net/ntnic: add GMF (Generic MAC Feeder) module

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

The Generic MAC Feeder module provides a way to feed data
to the MAC modules directly from the FPGA,
rather than from host or physical ports.
The use case for this is as a test tool and is not used by NTNIC.
This module is requireqd for correct initialization

Signed-off-by: Serhii Iliushyk <sil-plv@napatech.com>
---
 .../link_mgmt/link_100g/nt4ga_link_100g.c     |   8 ++
 drivers/net/ntnic/meson.build                 |   1 +
 .../net/ntnic/nthw/core/include/nthw_core.h   |   1 +
 .../net/ntnic/nthw/core/include/nthw_gmf.h    |  64 +++++++++
 drivers/net/ntnic/nthw/core/nthw_gmf.c        | 133 ++++++++++++++++++
 5 files changed, 207 insertions(+)
 create mode 100644 drivers/net/ntnic/nthw/core/include/nthw_gmf.h
 create mode 100644 drivers/net/ntnic/nthw/core/nthw_gmf.c

diff --git a/drivers/net/ntnic/link_mgmt/link_100g/nt4ga_link_100g.c b/drivers/net/ntnic/link_mgmt/link_100g/nt4ga_link_100g.c
index 8964458b47..d8e0cad7cd 100644
--- a/drivers/net/ntnic/link_mgmt/link_100g/nt4ga_link_100g.c
+++ b/drivers/net/ntnic/link_mgmt/link_100g/nt4ga_link_100g.c
@@ -404,6 +404,14 @@ static int _port_init(adapter_info_t *drv, nthw_fpga_t *fpga, int port)
 	_enable_tx(drv, mac_pcs);
 	_reset_rx(drv, mac_pcs);
 
+	/* 2.2) Nt4gaPort::setup() */
+	if (nthw_gmf_init(NULL, fpga, port) == 0) {
+		nthw_gmf_t gmf;
+
+		if (nthw_gmf_init(&gmf, fpga, port) == 0)
+			nthw_gmf_set_enable(&gmf, true);
+	}
+
 	/* Phase 3. Link state machine steps */
 
 	/* 3.1) Create NIM, ::createNim() */
diff --git a/drivers/net/ntnic/meson.build b/drivers/net/ntnic/meson.build
index d7e6d05556..92167d24e4 100644
--- a/drivers/net/ntnic/meson.build
+++ b/drivers/net/ntnic/meson.build
@@ -38,6 +38,7 @@ sources = files(
         'nthw/core/nt200a0x/reset/nthw_fpga_rst9563.c',
         'nthw/core/nt200a0x/reset/nthw_fpga_rst_nt200a0x.c',
         'nthw/core/nthw_fpga.c',
+        'nthw/core/nthw_gmf.c',
         'nthw/core/nthw_gpio_phy.c',
         'nthw/core/nthw_hif.c',
         'nthw/core/nthw_i2cm.c',
diff --git a/drivers/net/ntnic/nthw/core/include/nthw_core.h b/drivers/net/ntnic/nthw/core/include/nthw_core.h
index fe32891712..4073f9632c 100644
--- a/drivers/net/ntnic/nthw/core/include/nthw_core.h
+++ b/drivers/net/ntnic/nthw/core/include/nthw_core.h
@@ -17,6 +17,7 @@
 #include "nthw_iic.h"
 #include "nthw_i2cm.h"
 
+#include "nthw_gmf.h"
 #include "nthw_gpio_phy.h"
 #include "nthw_mac_pcs.h"
 #include "nthw_sdc.h"
diff --git a/drivers/net/ntnic/nthw/core/include/nthw_gmf.h b/drivers/net/ntnic/nthw/core/include/nthw_gmf.h
new file mode 100644
index 0000000000..cc5be85154
--- /dev/null
+++ b/drivers/net/ntnic/nthw/core/include/nthw_gmf.h
@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2023 Napatech A/S
+ */
+
+#ifndef __NTHW_GMF_H__
+#define __NTHW_GMF_H__
+
+struct nthw_gmf {
+	nthw_fpga_t *mp_fpga;
+	nthw_module_t *mp_mod_gmf;
+	int mn_instance;
+
+	nthw_register_t *mp_ctrl;
+	nthw_field_t *mp_ctrl_enable;
+	nthw_field_t *mp_ctrl_ifg_enable;
+	nthw_field_t *mp_ctrl_ifg_tx_now_always;
+	nthw_field_t *mp_ctrl_ifg_tx_on_ts_always;
+	nthw_field_t *mp_ctrl_ifg_tx_on_ts_adjust_on_set_clock;
+	nthw_field_t *mp_ctrl_ifg_auto_adjust_enable;
+	nthw_field_t *mp_ctrl_ts_inject_always;
+	nthw_field_t *mp_ctrl_fcs_always;
+
+	nthw_register_t *mp_speed;
+	nthw_field_t *mp_speed_ifg_speed;
+
+	nthw_register_t *mp_ifg_clock_delta;
+	nthw_field_t *mp_ifg_clock_delta_delta;
+
+	nthw_register_t *mp_ifg_clock_delta_adjust;
+	nthw_field_t *mp_ifg_clock_delta_adjust_delta;
+
+	nthw_register_t *mp_ifg_max_adjust_slack;
+	nthw_field_t *mp_ifg_max_adjust_slack_slack;
+
+	nthw_register_t *mp_debug_lane_marker;
+	nthw_field_t *mp_debug_lane_marker_compensation;
+
+	nthw_register_t *mp_stat_sticky;
+	nthw_field_t *mp_stat_sticky_data_underflowed;
+	nthw_field_t *mp_stat_sticky_ifg_adjusted;
+
+	nthw_register_t *mp_stat_next_pkt;
+	nthw_field_t *mp_stat_next_pkt_ns;
+
+	nthw_register_t *mp_stat_max_delayed_pkt;
+	nthw_field_t *mp_stat_max_delayed_pkt_ns;
+
+	nthw_register_t *mp_ts_inject;
+	nthw_field_t *mp_ts_inject_offset;
+	nthw_field_t *mp_ts_inject_pos;
+	int mn_param_gmf_ifg_speed_mul;
+	int mn_param_gmf_ifg_speed_div;
+
+	bool m_administrative_block;	/* Used to enforce license expiry */
+};
+
+typedef struct nthw_gmf nthw_gmf_t;
+
+int nthw_gmf_init(nthw_gmf_t *p, nthw_fpga_t *p_fpga, int n_instance);
+
+void nthw_gmf_set_enable(nthw_gmf_t *p, bool enable);
+
+#endif	/* __NTHW_GMF_H__ */
diff --git a/drivers/net/ntnic/nthw/core/nthw_gmf.c b/drivers/net/ntnic/nthw/core/nthw_gmf.c
new file mode 100644
index 0000000000..16a4c288bd
--- /dev/null
+++ b/drivers/net/ntnic/nthw/core/nthw_gmf.c
@@ -0,0 +1,133 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2023 Napatech A/S
+ */
+
+#include <limits.h>
+#include <math.h>
+#include "ntlog.h"
+
+#include "nthw_drv.h"
+#include "nthw_register.h"
+
+#include "nthw_gmf.h"
+
+int nthw_gmf_init(nthw_gmf_t *p, nthw_fpga_t *p_fpga, int n_instance)
+{
+	nthw_module_t *mod = nthw_fpga_query_module(p_fpga, MOD_GMF, n_instance);
+
+	if (p == NULL)
+		return mod == NULL ? -1 : 0;
+
+	if (mod == NULL) {
+		NT_LOG(ERR, NTHW, "%s: GMF %d: no such instance",
+			p_fpga->p_fpga_info->mp_adapter_id_str, n_instance);
+		return -1;
+	}
+
+	p->mp_fpga = p_fpga;
+	p->mn_instance = n_instance;
+	p->mp_mod_gmf = mod;
+
+	p->mp_ctrl = nthw_module_get_register(p->mp_mod_gmf, GMF_CTRL);
+	p->mp_ctrl_enable = nthw_register_get_field(p->mp_ctrl, GMF_CTRL_ENABLE);
+	p->mp_ctrl_ifg_enable = nthw_register_get_field(p->mp_ctrl, GMF_CTRL_IFG_ENABLE);
+	p->mp_ctrl_ifg_auto_adjust_enable =
+		nthw_register_get_field(p->mp_ctrl, GMF_CTRL_IFG_AUTO_ADJUST_ENABLE);
+	p->mp_ctrl_ts_inject_always =
+		nthw_register_query_field(p->mp_ctrl, GMF_CTRL_TS_INJECT_ALWAYS);
+	p->mp_ctrl_fcs_always = nthw_register_query_field(p->mp_ctrl, GMF_CTRL_FCS_ALWAYS);
+
+	p->mp_speed = nthw_module_get_register(p->mp_mod_gmf, GMF_SPEED);
+	p->mp_speed_ifg_speed = nthw_register_get_field(p->mp_speed, GMF_SPEED_IFG_SPEED);
+
+	p->mp_ifg_clock_delta = nthw_module_get_register(p->mp_mod_gmf, GMF_IFG_SET_CLOCK_DELTA);
+	p->mp_ifg_clock_delta_delta =
+		nthw_register_get_field(p->mp_ifg_clock_delta, GMF_IFG_SET_CLOCK_DELTA_DELTA);
+
+	p->mp_ifg_max_adjust_slack =
+		nthw_module_get_register(p->mp_mod_gmf, GMF_IFG_MAX_ADJUST_SLACK);
+	p->mp_ifg_max_adjust_slack_slack = nthw_register_get_field(p->mp_ifg_max_adjust_slack,
+			GMF_IFG_MAX_ADJUST_SLACK_SLACK);
+
+	p->mp_debug_lane_marker = nthw_module_get_register(p->mp_mod_gmf, GMF_DEBUG_LANE_MARKER);
+	p->mp_debug_lane_marker_compensation =
+		nthw_register_get_field(p->mp_debug_lane_marker,
+			GMF_DEBUG_LANE_MARKER_COMPENSATION);
+
+	p->mp_stat_sticky = nthw_module_get_register(p->mp_mod_gmf, GMF_STAT_STICKY);
+	p->mp_stat_sticky_data_underflowed =
+		nthw_register_get_field(p->mp_stat_sticky, GMF_STAT_STICKY_DATA_UNDERFLOWED);
+	p->mp_stat_sticky_ifg_adjusted =
+		nthw_register_get_field(p->mp_stat_sticky, GMF_STAT_STICKY_IFG_ADJUSTED);
+
+	p->mn_param_gmf_ifg_speed_mul =
+		nthw_fpga_get_product_param(p_fpga, NT_GMF_IFG_SPEED_MUL, 1);
+	p->mn_param_gmf_ifg_speed_div =
+		nthw_fpga_get_product_param(p_fpga, NT_GMF_IFG_SPEED_DIV, 1);
+
+	p->m_administrative_block = false;
+
+	p->mp_stat_next_pkt = nthw_module_query_register(p->mp_mod_gmf, GMF_STAT_NEXT_PKT);
+
+	if (p->mp_stat_next_pkt) {
+		p->mp_stat_next_pkt_ns =
+			nthw_register_query_field(p->mp_stat_next_pkt, GMF_STAT_NEXT_PKT_NS);
+
+	} else {
+		p->mp_stat_next_pkt_ns = NULL;
+	}
+
+	p->mp_stat_max_delayed_pkt =
+		nthw_module_query_register(p->mp_mod_gmf, GMF_STAT_MAX_DELAYED_PKT);
+
+	if (p->mp_stat_max_delayed_pkt) {
+		p->mp_stat_max_delayed_pkt_ns =
+			nthw_register_query_field(p->mp_stat_max_delayed_pkt,
+				GMF_STAT_MAX_DELAYED_PKT_NS);
+
+	} else {
+		p->mp_stat_max_delayed_pkt_ns = NULL;
+	}
+
+	p->mp_ctrl_ifg_tx_now_always =
+		nthw_register_query_field(p->mp_ctrl, GMF_CTRL_IFG_TX_NOW_ALWAYS);
+	p->mp_ctrl_ifg_tx_on_ts_always =
+		nthw_register_query_field(p->mp_ctrl, GMF_CTRL_IFG_TX_ON_TS_ALWAYS);
+
+	p->mp_ctrl_ifg_tx_on_ts_adjust_on_set_clock =
+		nthw_register_query_field(p->mp_ctrl, GMF_CTRL_IFG_TX_ON_TS_ADJUST_ON_SET_CLOCK);
+
+	p->mp_ifg_clock_delta_adjust =
+		nthw_module_query_register(p->mp_mod_gmf, GMF_IFG_SET_CLOCK_DELTA_ADJUST);
+
+	if (p->mp_ifg_clock_delta_adjust) {
+		p->mp_ifg_clock_delta_adjust_delta =
+			nthw_register_query_field(p->mp_ifg_clock_delta_adjust,
+				GMF_IFG_SET_CLOCK_DELTA_ADJUST_DELTA);
+
+	} else {
+		p->mp_ifg_clock_delta_adjust_delta = NULL;
+	}
+
+	p->mp_ts_inject = nthw_module_query_register(p->mp_mod_gmf, GMF_TS_INJECT);
+
+	if (p->mp_ts_inject) {
+		p->mp_ts_inject_offset =
+			nthw_register_query_field(p->mp_ts_inject, GMF_TS_INJECT_OFFSET);
+		p->mp_ts_inject_pos =
+			nthw_register_query_field(p->mp_ts_inject, GMF_TS_INJECT_POS);
+
+	} else {
+		p->mp_ts_inject_offset = NULL;
+		p->mp_ts_inject_pos = NULL;
+	}
+
+	return 0;
+}
+
+void nthw_gmf_set_enable(nthw_gmf_t *p, bool enable)
+{
+	if (!p->m_administrative_block)
+		nthw_field_set_val_flush32(p->mp_ctrl_enable, enable ? 1 : 0);
+}
-- 
2.45.0