linux/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c

// SPDX-License-Identifier: GPL-2.0-only
/*******************************************************************************
  This is the driver for the MAC 10/100 on-chip Ethernet controller
  currently tested on all the ST boards based on STb7109 and stx7200 SoCs.

  DWC Ether MAC 10/100 Universal version 4.0 has been used for developing
  this code.

  This contains the functions to handle the dma.

  Copyright (C) 2007-2009  STMicroelectronics Ltd


  Author: Giuseppe Cavallaro <[email protected]>
*******************************************************************************/

#include <linux/io.h>
#include "dwmac100.h"
#include "dwmac_dma.h"

static void dwmac100_dma_init(void __iomem *ioaddr,
			      struct stmmac_dma_cfg *dma_cfg, int atds)
{ … }

static void dwmac100_dma_init_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
				 struct stmmac_dma_cfg *dma_cfg,
				 dma_addr_t dma_rx_phy, u32 chan)
{ … }

static void dwmac100_dma_init_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
				 struct stmmac_dma_cfg *dma_cfg,
				 dma_addr_t dma_tx_phy, u32 chan)
{ … }

/* Store and Forward capability is not used at all.
 *
 * The transmit threshold can be programmed by setting the TTC bits in the DMA
 * control register.
 */
static void dwmac100_dma_operation_mode_tx(struct stmmac_priv *priv,
					   void __iomem *ioaddr, int mode,
					   u32 channel, int fifosz, u8 qmode)
{ … }

static void dwmac100_dump_dma_regs(struct stmmac_priv *priv,
				   void __iomem *ioaddr, u32 *reg_space)
{ … }

/* DMA controller has two counters to track the number of the missed frames. */
static void dwmac100_dma_diagnostic_fr(struct stmmac_extra_stats *x,
				       void __iomem *ioaddr)
{ … }

const struct stmmac_dma_ops dwmac100_dma_ops = …;