path: root/drivers/net/ethernet/ti/icssg/icssg_common.c

// SPDX-License-Identifier: GPL-2.0

/* Texas Instruments ICSSG Ethernet Driver
 *
 * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
 * Copyright (C) Siemens AG, 2024
 *
 */

#include <linux/dma-mapping.h>
#include <linux/dma/ti-cppi5.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/remoteproc/pruss.h>
#include <linux/regmap.h>
#include <linux/remoteproc.h>

#include "icssg_prueth.h"
#include "../k3-cppi-desc-pool.h"

/* Netif debug messages possible */
#define PRUETH_EMAC_DEBUG       (NETIF_MSG_DRV | \
				 NETIF_MSG_PROBE | \
				 NETIF_MSG_LINK | \
				 NETIF_MSG_TIMER | \
				 NETIF_MSG_IFDOWN | \
				 NETIF_MSG_IFUP | \
				 NETIF_MSG_RX_ERR | \
				 NETIF_MSG_TX_ERR | \
				 NETIF_MSG_TX_QUEUED | \
				 NETIF_MSG_INTR | \
				 NETIF_MSG_TX_DONE | \
				 NETIF_MSG_RX_STATUS | \
				 NETIF_MSG_PKTDATA | \
				 NETIF_MSG_HW | \
				 NETIF_MSG_WOL)

#define prueth_napi_to_emac(napi) container_of(napi, struct prueth_emac, napi_rx)

void prueth_cleanup_rx_chns(struct prueth_emac *emac,
			    struct prueth_rx_chn *rx_chn,
			    int max_rflows)
{
	if (rx_chn->desc_pool)
		k3_cppi_desc_pool_destroy(rx_chn->desc_pool);

	if (rx_chn->rx_chn)
		k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
}
EXPORT_SYMBOL_GPL(prueth_cleanup_rx_chns);

void prueth_cleanup_tx_chns(struct prueth_emac *emac)
{
	int i;

	for (i = 0; i < emac->tx_ch_num; i++) {
		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];

		if (tx_chn->desc_pool)
			k3_cppi_desc_pool_destroy(tx_chn->desc_pool);

		if (tx_chn->tx_chn)
			k3_udma_glue_release_tx_chn(tx_chn->tx_chn);

		/* Assume prueth_cleanup_tx_chns() is called at the
		 * end after all channel resources are freed
		 */
		memset(tx_chn, 0, sizeof(*tx_chn));
	}
}
EXPORT_SYMBOL_GPL(prueth_cleanup_tx_chns);

void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num)
{
	int i;

	for (i = 0; i < num; i++) {
		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];

		if (tx_chn->irq)
			free_irq(tx_chn->irq, tx_chn);
		netif_napi_del(&tx_chn->napi_tx);
	}
}
EXPORT_SYMBOL_GPL(prueth_ndev_del_tx_napi);

void prueth_xmit_free(struct prueth_tx_chn *tx_chn,
		      struct cppi5_host_desc_t *desc)
{
	struct cppi5_host_desc_t *first_desc, *next_desc;
	dma_addr_t buf_dma, next_desc_dma;
	u32 buf_dma_len;

	first_desc = desc;
	next_desc = first_desc;

	cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);

	dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len,
			 DMA_TO_DEVICE);

	next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
	while (next_desc_dma) {
		next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
						       next_desc_dma);
		cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
		k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn<