// SPDX-License-Identifier: GPL-2.0-only
/* Atlantic Network Driver
 * Copyright (C) 2020 Marvell International Ltd.
 */

#include <linux/iopoll.h>

#include "aq_hw.h"
#include "aq_hw_utils.h"
#include "aq_nic.h"
#include "hw_atl/hw_atl_llh.h"
#include "hw_atl2_utils.h"
#include "hw_atl2_llh.h"
#include "hw_atl2_internal.h"

#define AQ_A2_FW_READ_TRY_MAX 1000

#define hw_atl2_shared_buffer_write(HW, ITEM, VARIABLE) \
{\
	BUILD_BUG_ON_MSG((offsetof(struct fw_interface_in, ITEM) % \
			 sizeof(u32)) != 0,\
			 "Unaligned write " # ITEM);\
	BUILD_BUG_ON_MSG((sizeof(VARIABLE) %  sizeof(u32)) != 0,\
			 "Unaligned write length " # ITEM);\
	hw_atl2_mif_shared_buf_write(HW,\
		(offsetof(struct fw_interface_in, ITEM) / sizeof(u32)),\
		(u32 *)&(VARIABLE), sizeof(VARIABLE) / sizeof(u32));\
}

#define hw_atl2_shared_buffer_get(HW, ITEM, VARIABLE) \
{\
	BUILD_BUG_ON_MSG((offsetof(struct fw_interface_in, ITEM) % \
			 sizeof(u32)) != 0,\
			 "Unaligned get " # ITEM);\
	BUILD_BUG_ON_MSG((sizeof(VARIABLE) %  sizeof(u32)) != 0,\
			 "Unaligned get length " # ITEM);\
	hw_atl2_mif_shared_buf_get(HW, \
		(offsetof(struct fw_interface_in, ITEM) / sizeof(u32)),\
		(u32 *)&(VARIABLE), \
		sizeof(VARIABLE) / sizeof(u32));\
}

/* This should never be used on non atomic fields,
 * treat any > u32 read as non atomic.
 */
#define hw_atl2_shared_buffer_read(HW, ITEM, VARIABLE) \
{\
	BUILD_BUG_ON_MSG((offsetof(struct fw_interface_out, ITEM) % \
			 sizeof(u32)) != 0,\
			 "Unaligned read " # ITEM);\
	BUILD_BUG_ON_MSG((sizeof(VARIABLE) %  sizeof(u32)) != 0,\
			 "Unaligned read length " # ITEM);\
	BUILD_BUG_ON_MSG(sizeof(VARIABLE) > sizeof(u32),\
			 "Non atomic read " # ITEM);\
	hw_atl2_mif_shared_buf_read(HW, \
		(offsetof(struct fw_interface_out, ITEM) / sizeof(u32)),\
		(u32 *)&(VARIABLE), sizeof(VARIABLE) / sizeof(u32));\
}

#define hw_atl2_shared_buffer_read_safe(HW, ITEM, DATA) \
({\
	BUILD_BUG_ON_MSG((offsetof(struct fw_interface_out, ITEM) % \
			 sizeof(u32)) != 0,\
			 "Unaligned read_safe " # ITEM);\
	BUILD_BUG_ON_MSG((sizeof(((struct fw_interface_out *)0)->ITEM) % \
			 sizeof(u32)) != 0,\
			 "Unaligned read_safe length " # ITEM);\
	hw_atl2_shared_buffer_read_block((HW), \
		(offsetof(struct fw_interface_out, ITEM) / sizeof(u32)),\
		sizeof(((struct fw_interface_out *)0)->ITEM) / sizeof(u32),\
		(DATA));\
})

static int hw_atl2_shared_buffer_read_block(struct aq_hw_s *self,
					    u32 offset, u32 dwords, void *data)
{
	struct transaction_counter_s tid1, tid2;
	int cnt = 0;

	do {
		do {
			hw_atl2_shared_buffer_read(self, transaction_id, tid1);
			cnt++;
			if (cnt > AQ_A2_FW_READ_TRY_MAX)
				return -ETIME;
			if (tid1.transaction_cnt_a != tid1.transaction_cnt_b)
				mdelay(1);
		} while (tid1.transaction_cnt_a != tid1.transaction_cnt_b);

		hw_atl2_mif_shared_buf_read(self, offset, (u32 *)data, dwords);

		hw_atl2_shared_buffer_read(self, transaction_id, tid2);

		cnt++;
		if (cnt > AQ_A2_FW_READ_TRY_MAX)
			return -ETIME;
	} while (tid2.transaction_cnt_a != tid2.transaction_cnt_b ||
		 tid1.transaction_cnt_a != tid2.transaction_cnt_a);

	return 0;
}

static inline int hw_atl2_shared_buffer_finish_ack(struct aq_hw_s *self)
{
	u32 val;
	int err;

	hw_atl2_mif_host_finished_write_set(self, 1U);
	err = readx_poll_timeout_atomic(hw_atl2_mif_mcp_finished_read_get,
					self, val, val == 0U,
					100, 100000U);
	WARN(err, "hw_atl2_shared_buffer_finish_ack");

	return err;
}

static int aq_a2_fw_init(struct aq_hw_s *self)
{
	struct link_control_s link_control;
	u32 mtu;
	u32 val;
	int err;

	hw_atl2_shared_buffer_get(self, link_control, link_control);
	link_control.mode = AQ_HOST_MODE_ACTIVE;
	hw_atl2_shared_buffer_write(self, link_control, link_control);

	hw_atl2_shared_buffer_get(self, mtu, mtu);
	mtu = HW_ATL2_MTU_JUMBO;
	hw_atl2_shared_buffer_write(self, mtu, mtu);

	hw_atl2_mif_host_finished_write_set(self, 1U);
	err = readx_poll_timeout_atomic(hw_atl2_mif_mcp_finished_read_get,
					self, val, val == 0U,
					100, 5000000U);
	WARN(err, "hw_atl2_shared_buffer_finish_ack");

	return err;
}

static int aq_a2_fw_deinit(struct aq_hw_s *self)
{
	struct link_control_s link_control;

	hw_atl2_shared_buffer_get(self, link_control, link_control);
	link_control.mode = AQ_HOST_MODE_SHUTDOWN;
	hw_atl2_shared_buffer_write(self, link_control, link_control);

	return hw_atl2_shared_buffer_finish_ack(self);
}

static void a2_link_speed_mask2fw(u32 speed,
				  struct link_options_s *link_options)
{
	link_options->rate_10G = !!(speed & AQ_NIC_RATE_10G);
	link_options->rate_5G = !!(speed & AQ_NIC_RATE_5G);
	link_options->rate_N5G = link_options->rate_5G;
	link_options->rate_2P5G = !!(speed & AQ_NIC_RATE_2G5);
	link_options->rate_N2P5G = link_options->rate_2P5G;
	link_options->rate_1G = !!(speed & AQ_NIC_RATE_1G);
	link_options->rate_100M = !!(speed & AQ_NIC_RATE_100M);
	link_options->rate_10M = !!(speed & AQ_NIC_RATE_10M);

	link_options->rate_1G_hd = !!(speed & AQ_NIC_RATE_1G_HALF);
	link_options->rate_100M_hd = !!(speed & AQ_NIC_RATE_100M_HALF);
	link_options->rate_10M_hd = !!(speed & AQ_NIC_RATE_10M_HALF);
}

static u32 a2_fw_dev_to_eee_mask(struct device_link_caps_s *device_link_caps)
{
	u32 rate = 0;

	if (device_link_caps->eee_10G)
		rate |= AQ_NIC_RATE_EEE_10G;
	if (device_link_caps->eee_5G)
		rate |= AQ_NIC_RATE_EEE_5G;
	if (device_link_caps->eee_2P5G)
		rate |= AQ_NIC_RATE_EEE_2G5;
	if (device_link_caps->eee_1G)
		rate |= AQ_NIC_RATE_EEE_1G;
	if (device_link_caps->eee_100M)
		rate |= AQ_NIC_RATE_EEE_100M;

	return rate;
}

static u32 a2_fw_lkp_to_mask(struct lkp_link_caps_s *lkp_link_caps)
{
	u32 rate = 0;

	if (lkp_link_caps->rate_10G)
		rate |= AQ_NIC_RATE_10G;
	if (lkp_link_caps->rate_5G)
		rate |= AQ_NIC_RATE_5G;
	if (lkp_link_caps->rate_2P5G)
		rate |= AQ_NIC_RATE_2G5;
	if (lkp_link_caps->rate_1G)
		rate |= AQ_NIC_RATE_1G;
	if (lkp_link_caps->rate_1G_hd)
		rate |= AQ_NIC_RATE_1G_HALF;
	if (lkp_link_caps->rate_100M)
		rate |= AQ_NIC_RATE_100M;
	if (lkp_link_caps->rate_100M_hd)
		rate |= AQ_NIC_RATE_100M_HALF;
	if (lkp_link_caps->rate_10M)
		rate |= AQ_NIC_RATE_10M;
	if (lkp_link_caps->rate_10M_hd)
		rate |= AQ_NIC_RATE_10M_HALF;

	if (lkp_link_caps->eee_10G)
		rate |= AQ_NIC_RATE_EEE_10G;
	if (lkp_link_caps->eee_5G)
		rate |= AQ_NIC_RATE_EEE_5G;
	if (lkp_link_caps->eee_2P5G)
		rate |= AQ_NIC_RATE_EEE_2G5;
	if (lkp_link_caps->eee_1G)
		rate |= AQ_NIC_RATE_EEE_1G;
	if (lkp_link_caps->eee_100M)
		rate |= AQ_NIC_RATE_EEE_100M;

	return rate;
}

static int aq_a2_fw_set_link_speed(struct aq_hw_s *self, u32 speed)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);
	link_options.link_up = 1U;
	a2_link_speed_mask2fw(speed, &link_options);
	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

static void aq_a2_fw_set_mpi_flow_control(struct aq_hw_s *self,
					  struct link_options_s *link_options)
{
	u32 flow_control = self->aq_nic_cfg->fc.req;

	link_options->pause_rx = !!(flow_control & AQ_NIC_FC_RX);
	link_options->pause_tx = !!(flow_control & AQ_NIC_FC_TX);
}

static void aq_a2_fw_upd_eee_rate_bits(struct aq_hw_s *self,
				       struct link_options_s *link_options,
				       u32 eee_speeds)
{
	link_options->eee_10G =  !!(eee_speeds & AQ_NIC_RATE_EEE_10G);
	link_options->eee_5G = !!(eee_speeds & AQ_NIC_RATE_EEE_5G);
	link_options->eee_2P5G = !!(eee_speeds & AQ_NIC_RATE_EEE_2G5);
	link_options->eee_1G = !!(eee_speeds & AQ_NIC_RATE_EEE_1G);
	link_options->eee_100M = !!(eee_speeds & AQ_NIC_RATE_EEE_100M);
}

static int aq_a2_fw_set_state(struct aq_hw_s *self,
			      enum hal_atl_utils_fw_state_e state)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);

	switch (state) {
	case MPI_INIT:
		link_options.link_up = 1U;
		aq_a2_fw_upd_eee_rate_bits(self, &link_options,
					   self->aq_nic_cfg->eee_speeds);
		aq_a2_fw_set_mpi_flow_control(self, &link_options);
		break;
	case MPI_DEINIT:
		link_options.link_up = 0U;
		break;
	case MPI_RESET:
	case MPI_POWER:
		/* No actions */
		break;
	}

	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

static int aq_a2_fw_update_link_status(struct aq_hw_s *self)
{
	struct lkp_link_caps_s lkp_link_caps;
	struct link_status_s link_status;

	hw_atl2_shared_buffer_read(self, link_status, link_status);

	switch (link_status.link_rate) {
	case AQ_A2_FW_LINK_RATE_10G:
		self->aq_link_status.mbps = 10000;
		break;
	case AQ_A2_FW_LINK_RATE_5G:
		self->aq_link_status.mbps = 5000;
		break;
	case AQ_A2_FW_LINK_RATE_2G5:
		self->aq_link_status.mbps = 2500;
		break;
	case AQ_A2_FW_LINK_RATE_1G:
		self->aq_link_status.mbps = 1000;
		break;
	case AQ_A2_FW_LINK_RATE_100M:
		self->aq_link_status.mbps = 100;
		break;
	case AQ_A2_FW_LINK_RATE_10M:
		self->aq_link_status.mbps = 10;
		break;
	default:
		self->aq_link_status.mbps = 0;
	}
	self->aq_link_status.full_duplex = link_status.duplex;

	hw_atl2_shared_buffer_read(self, lkp_link_caps, lkp_link_caps);

	self->aq_link_status.lp_link_speed_msk =
				 a2_fw_lkp_to_mask(&lkp_link_caps);
	self->aq_link_status.lp_flow_control =
				((lkp_link_caps.pause_rx) ? AQ_NIC_FC_RX : 0) |
				((lkp_link_caps.pause_tx) ? AQ_NIC_FC_TX : 0);

	return 0;
}

static int aq_a2_fw_get_mac_permanent(struct aq_hw_s *self, u8 *mac)
{
	struct mac_address_aligned_s mac_address;

	hw_atl2_shared_buffer_get(self, mac_address, mac_address);
	ether_addr_copy(mac, (u8 *)mac_address.aligned.mac_address);

	return 0;
}

static void aq_a2_fill_a0_stats(struct aq_hw_s *self,
				struct statistics_s *stats)
{
	struct hw_atl2_priv *priv = (struct hw_atl2_priv *)self->priv;
	struct aq_stats_s *cs = &self->curr_stats;
	struct aq_stats_s curr_stats = *cs;
	bool corrupted_stats = false;

#define AQ_SDELTA(_N, _F)  \
do { \
	if (!corrupted_stats && \
	    ((s64)(stats->a0.msm._F - priv->last_stats.a0.msm._F)) >= 0) \
		curr_stats._N += stats->a0.msm._F - priv->last_stats.a0.msm._F;\
	else \
		corrupted_stats = true; \
} while (0)

	if (self->aq_link_status.mbps) {
		AQ_SDELTA(uprc, rx_unicast_frames);
		AQ_SDELTA(mprc, rx_multicast_frames);
		AQ_SDELTA(bprc, rx_broadcast_frames);
		AQ_SDELTA(erpr, rx_error_frames);

		AQ_SDELTA(uptc, tx_unicast_frames);
		AQ_SDELTA(mptc, tx_multicast_frames);
		AQ_SDELTA(bptc, tx_broadcast_frames);
		AQ_SDELTA(erpt, tx_errors);

		AQ_SDELTA(ubrc, rx_unicast_octets);
		AQ_SDELTA(ubtc, tx_unicast_octets);
		AQ_SDELTA(mbrc, rx_multicast_octets);
		AQ_SDELTA(mbtc, tx_multicast_octets);
		AQ_SDELTA(bbrc, rx_broadcast_octets);
		AQ_SDELTA(bbtc, tx_broadcast_octets);

		if (!corrupted_stats)
			*cs = curr_stats;
	}
#undef AQ_SDELTA

}

static void aq_a2_fill_b0_stats(struct aq_hw_s *self,
				struct statistics_s *stats)
{
	struct hw_atl2_priv *priv = (struct hw_atl2_priv *)self->priv;
	struct aq_stats_s *cs = &self->curr_stats;
	struct aq_stats_s curr_stats = *cs;
	bool corrupted_stats = false;

#define AQ_SDELTA(_N, _F)  \
do { \
	if (!corrupted_stats && \
	    ((s64)(stats->b0._F - priv->last_stats.b0._F)) >= 0) \
		curr_stats._N += stats->b0._F - priv->last_stats.b0._F; \
	else \
		corrupted_stats = true; \
} while (0)

	if (self->aq_link_status.mbps) {
		AQ_SDELTA(uprc, rx_unicast_frames);
		AQ_SDELTA(mprc, rx_multicast_frames);
		AQ_SDELTA(bprc, rx_broadcast_frames);
		AQ_SDELTA(erpr, rx_errors);
		AQ_SDELTA(brc, rx_good_octets);

		AQ_SDELTA(uptc, tx_unicast_frames);
		AQ_SDELTA(mptc, tx_multicast_frames);
		AQ_SDELTA(bptc, tx_broadcast_frames);
		AQ_SDELTA(erpt, tx_errors);
		AQ_SDELTA(btc, tx_good_octets);

		if (!corrupted_stats)
			*cs = curr_stats;
	}
#undef AQ_SDELTA
}

static int aq_a2_fw_update_stats(struct aq_hw_s *self)
{
	struct hw_atl2_priv *priv = (struct hw_atl2_priv *)self->priv;
	struct aq_stats_s *cs = &self->curr_stats;
	struct statistics_s stats;
	struct version_s version;
	int err;

	err = hw_atl2_shared_buffer_read_safe(self, version, &version);
	if (err)
		return err;

	err = hw_atl2_shared_buffer_read_safe(self, stats, &stats);
	if (err)
		return err;

	if (version.drv_iface_ver == AQ_A2_FW_INTERFACE_A0)
		aq_a2_fill_a0_stats(self, &stats);
	else
		aq_a2_fill_b0_stats(self, &stats);

	cs->dma_pkt_rc = hw_atl_stats_rx_dma_good_pkt_counter_get(self);
	cs->dma_pkt_tc = hw_atl_stats_tx_dma_good_pkt_counter_get(self);
	cs->dma_oct_rc = hw_atl_stats_rx_dma_good_octet_counter_get(self);
	cs->dma_oct_tc = hw_atl_stats_tx_dma_good_octet_counter_get(self);
	cs->dpc = hw_atl_rpb_rx_dma_drop_pkt_cnt_get(self);

	memcpy(&priv->last_stats, &stats, sizeof(stats));

	return 0;
}

static int aq_a2_fw_get_phy_temp(struct aq_hw_s *self, int *temp)
{
	struct phy_health_monitor_s phy_health_monitor;

	hw_atl2_shared_buffer_read_safe(self, phy_health_monitor,
					&phy_health_monitor);

	*temp = (int8_t)phy_health_monitor.phy_temperature * 1000;
	return 0;
}

static int aq_a2_fw_get_mac_temp(struct aq_hw_s *self, int *temp)
{
	/* There's only one temperature sensor on A2, use it for
	 * both MAC and PHY.
	 */
	return aq_a2_fw_get_phy_temp(self, temp);
}

static int aq_a2_fw_set_eee_rate(struct aq_hw_s *self, u32 speed)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);

	aq_a2_fw_upd_eee_rate_bits(self, &link_options, speed);

	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

static int aq_a2_fw_get_eee_rate(struct aq_hw_s *self, u32 *rate,
				 u32 *supported_rates)
{
	struct device_link_caps_s device_link_caps;
	struct lkp_link_caps_s lkp_link_caps;

	hw_atl2_shared_buffer_read(self, device_link_caps, device_link_caps);
	hw_atl2_shared_buffer_read(self, lkp_link_caps, lkp_link_caps);

	*supported_rates = a2_fw_dev_to_eee_mask(&device_link_caps);
	*rate = a2_fw_lkp_to_mask(&lkp_link_caps);

	return 0;
}

static int aq_a2_fw_renegotiate(struct aq_hw_s *self)
{
	struct link_options_s link_options;
	int err;

	hw_atl2_shared_buffer_get(self, link_options, link_options);
	link_options.link_renegotiate = 1U;
	hw_atl2_shared_buffer_write(self, link_options, link_options);

	err = hw_atl2_shared_buffer_finish_ack(self);

	/* We should put renegotiate status back to zero
	 * after command completes
	 */
	link_options.link_renegotiate = 0U;
	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return err;
}

static int aq_a2_fw_set_flow_control(struct aq_hw_s *self)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);

	aq_a2_fw_set_mpi_flow_control(self, &link_options);

	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

static u32 aq_a2_fw_get_flow_control(struct aq_hw_s *self, u32 *fcmode)
{
	struct link_status_s link_status;

	hw_atl2_shared_buffer_read(self, link_status, link_status);

	*fcmode = ((link_status.pause_rx) ? AQ_NIC_FC_RX : 0) |
		  ((link_status.pause_tx) ? AQ_NIC_FC_TX : 0);
	return 0;
}

static int aq_a2_fw_set_phyloopback(struct aq_hw_s *self, u32 mode, bool enable)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);

	switch (mode) {
	case AQ_HW_LOOPBACK_PHYINT_SYS:
		link_options.internal_loopback = enable;
		break;
	case AQ_HW_LOOPBACK_PHYEXT_SYS:
		link_options.external_loopback = enable;
		break;
	default:
		return -EINVAL;
	}

	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

u32 hw_atl2_utils_get_fw_version(struct aq_hw_s *self)
{
	struct version_s version;

	hw_atl2_shared_buffer_read_safe(self, version, &version);

	/* A2 FW version is stored in reverse order */
	return version.bundle.major << 24 |
	       version.bundle.minor << 16 |
	       version.bundle.build;
}

int hw_atl2_utils_get_action_resolve_table_caps(struct aq_hw_s *self,
						u8 *base_index, u8 *count)
{
	struct filter_caps_s filter_caps;
	int err;

	err = hw_atl2_shared_buffer_read_safe(self, filter_caps, &filter_caps);
	if (err)
		return err;

	*base_index = filter_caps.rslv_tbl_base_index;
	*count = filter_caps.rslv_tbl_count;
	return 0;
}

static int aq_a2_fw_set_downshift(struct aq_hw_s *self, u32 counter)
{
	struct link_options_s link_options;

	hw_atl2_shared_buffer_get(self, link_options, link_options);
	link_options.downshift = !!counter;
	link_options.downshift_retry = counter;
	hw_atl2_shared_buffer_write(self, link_options, link_options);

	return hw_atl2_shared_buffer_finish_ack(self);
}

const struct aq_fw_ops aq_a2_fw_ops = {
	.init               = aq_a2_fw_init,
	.deinit             = aq_a2_fw_deinit,
	.reset              = NULL,
	.renegotiate        = aq_a2_fw_renegotiate,
	.get_mac_permanent  = aq_a2_fw_get_mac_permanent,
	.set_link_speed     = aq_a2_fw_set_link_speed,
	.set_state          = aq_a2_fw_set_state,
	.update_link_status = aq_a2_fw_update_link_status,
	.update_stats       = aq_a2_fw_update_stats,
	.get_mac_temp       = aq_a2_fw_get_mac_temp,
	.get_phy_temp       = aq_a2_fw_get_phy_temp,
	.set_eee_rate       = aq_a2_fw_set_eee_rate,
	.get_eee_rate       = aq_a2_fw_get_eee_rate,
	.set_flow_control   = aq_a2_fw_set_flow_control,
	.get_flow_control   = aq_a2_fw_get_flow_control,
	.set_phyloopback    = aq_a2_fw_set_phyloopback,
	.set_downshift      = aq_a2_fw_set_downshift,
};