[PATCH net-next v4 09/12] net: stmmac: dwmac4: Allow platforms to specify some DMA/MTL offsets

[Andrew Halaney <ahalaney@redhat.com>]

Some platforms have dwmac4 implementations that have a different
address space layout than the default, resulting in the need to define
their own DMA/MTL offsets.

Extend the functions to allow a platform driver to indicate what its
addresses are, overriding the defaults.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
---

Changes since v3:
    * Use static inline functions instead of macros in some places (Simon)

Changes since v2:
    * New, replacing old wrapper approach

 drivers/net/ethernet/stmicro/stmmac/dwmac4.h  | 101 +++++++++--
 .../net/ethernet/stmicro/stmmac/dwmac4_core.c |  36 ++--
 .../net/ethernet/stmicro/stmmac/dwmac4_dma.c  | 157 ++++++++++--------
 .../net/ethernet/stmicro/stmmac/dwmac4_dma.h  |  54 +++---
 .../net/ethernet/stmicro/stmmac/dwmac4_lib.c  |  67 +++++---
 include/linux/stmmac.h                        |  19 +++
 6 files changed, 293 insertions(+), 141 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index ccd49346d3b3..4538f334df57 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -336,14 +336,25 @@ enum power_event {
 
 #define MTL_CHAN_BASE_ADDR		0x00000d00
 #define MTL_CHAN_BASE_OFFSET		0x40
-#define MTL_CHANX_BASE_ADDR(x)		(MTL_CHAN_BASE_ADDR + \
-					(x * MTL_CHAN_BASE_OFFSET))
 
-#define MTL_CHAN_TX_OP_MODE(x)		MTL_CHANX_BASE_ADDR(x)
-#define MTL_CHAN_TX_DEBUG(x)		(MTL_CHANX_BASE_ADDR(x) + 0x8)
-#define MTL_CHAN_INT_CTRL(x)		(MTL_CHANX_BASE_ADDR(x) + 0x2c)
-#define MTL_CHAN_RX_OP_MODE(x)		(MTL_CHANX_BASE_ADDR(x) + 0x30)
-#define MTL_CHAN_RX_DEBUG(x)		(MTL_CHANX_BASE_ADDR(x) + 0x38)
+static inline u32 mtl_chanx_base_addr(const struct dwmac4_addrs *addrs,
+				      const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_chan + (x * addrs->mtl_chan_offset);
+	else
+		addr = MTL_CHAN_BASE_ADDR + (x * MTL_CHAN_BASE_OFFSET);
+
+	return addr;
+}
+
+#define MTL_CHAN_TX_OP_MODE(addrs, x)	mtl_chanx_base_addr(addrs, x)
+#define MTL_CHAN_TX_DEBUG(addrs, x)	(mtl_chanx_base_addr(addrs, x) + 0x8)
+#define MTL_CHAN_INT_CTRL(addrs, x)	(mtl_chanx_base_addr(addrs, x) + 0x2c)
+#define MTL_CHAN_RX_OP_MODE(addrs, x)	(mtl_chanx_base_addr(addrs, x) + 0x30)
+#define MTL_CHAN_RX_DEBUG(addrs, x)	(mtl_chanx_base_addr(addrs, x) + 0x38)
 
 #define MTL_OP_MODE_RSF			BIT(5)
 #define MTL_OP_MODE_TXQEN_MASK		GENMASK(3, 2)
@@ -388,8 +399,19 @@ enum power_event {
 /* MTL ETS Control register */
 #define MTL_ETS_CTRL_BASE_ADDR		0x00000d10
 #define MTL_ETS_CTRL_BASE_OFFSET	0x40
-#define MTL_ETSX_CTRL_BASE_ADDR(x)	(MTL_ETS_CTRL_BASE_ADDR + \
-					((x) * MTL_ETS_CTRL_BASE_OFFSET))
+
+static inline u32 mtl_etsx_ctrl_base_addr(const struct dwmac4_addrs *addrs,
+					  const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_ets_ctrl + (x * addrs->mtl_ets_ctrl_offset);
+	else
+		addr = MTL_ETS_CTRL_BASE_ADDR + (x * MTL_ETS_CTRL_BASE_OFFSET);
+
+	return addr;
+}
 
 #define MTL_ETS_CTRL_CC			BIT(3)
 #define MTL_ETS_CTRL_AVALG		BIT(2)
@@ -397,31 +419,76 @@ enum power_event {
 /* MTL Queue Quantum Weight */
 #define MTL_TXQ_WEIGHT_BASE_ADDR	0x00000d18
 #define MTL_TXQ_WEIGHT_BASE_OFFSET	0x40
-#define MTL_TXQX_WEIGHT_BASE_ADDR(x)	(MTL_TXQ_WEIGHT_BASE_ADDR + \
-					((x) * MTL_TXQ_WEIGHT_BASE_OFFSET))
+
+static inline u32 mtl_txqx_weight_base_addr(const struct dwmac4_addrs *addrs,
+					    const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_txq_weight + (x * addrs->mtl_txq_weight_offset);
+	else
+		addr = MTL_TXQ_WEIGHT_BASE_ADDR + (x * MTL_TXQ_WEIGHT_BASE_OFFSET);
+
+	return addr;
+}
+
 #define MTL_TXQ_WEIGHT_ISCQW_MASK	GENMASK(20, 0)
 
 /* MTL sendSlopeCredit register */
 #define MTL_SEND_SLP_CRED_BASE_ADDR	0x00000d1c
 #define MTL_SEND_SLP_CRED_OFFSET	0x40
-#define MTL_SEND_SLP_CREDX_BASE_ADDR(x)	(MTL_SEND_SLP_CRED_BASE_ADDR + \
-					((x) * MTL_SEND_SLP_CRED_OFFSET))
+
+static inline u32 mtl_send_slp_credx_base_addr(const struct dwmac4_addrs *addrs,
+					       const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_send_slp_cred + (x * addrs->mtl_send_slp_cred_offset);
+	else
+		addr = MTL_SEND_SLP_CRED_BASE_ADDR + (x * MTL_SEND_SLP_CRED_OFFSET);
+
+	return addr;
+}
 
 #define MTL_SEND_SLP_CRED_SSC_MASK	GENMASK(13, 0)
 
 /* MTL hiCredit register */
 #define MTL_HIGH_CRED_BASE_ADDR		0x00000d20
 #define MTL_HIGH_CRED_OFFSET		0x40
-#define MTL_HIGH_CREDX_BASE_ADDR(x)	(MTL_HIGH_CRED_BASE_ADDR + \
-					((x) * MTL_HIGH_CRED_OFFSET))
+
+static inline u32 mtl_high_credx_base_addr(const struct dwmac4_addrs *addrs,
+					   const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_high_cred + (x * addrs->mtl_high_cred_offset);
+	else
+		addr = MTL_HIGH_CRED_BASE_ADDR + (x * MTL_HIGH_CRED_OFFSET);
+
+	return addr;
+}
 
 #define MTL_HIGH_CRED_HC_MASK		GENMASK(28, 0)
 
 /* MTL loCredit register */
 #define MTL_LOW_CRED_BASE_ADDR		0x00000d24
 #define MTL_LOW_CRED_OFFSET		0x40
-#define MTL_LOW_CREDX_BASE_ADDR(x)	(MTL_LOW_CRED_BASE_ADDR + \
-					((x) * MTL_LOW_CRED_OFFSET))
+
+static inline u32 mtl_low_credx_base_addr(const struct dwmac4_addrs *addrs,
+					  const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->mtl_low_cred + (x * addrs->mtl_low_cred_offset);
+	else
+		addr = MTL_LOW_CRED_BASE_ADDR + (x * MTL_LOW_CRED_OFFSET);
+
+	return addr;
+}
 
 #define MTL_HIGH_CRED_LC_MASK		GENMASK(28, 0)
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index f44180519638..afaec3fb9ab6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -202,12 +202,14 @@ static void dwmac4_set_mtl_tx_queue_weight(struct stmmac_priv *priv,
 					   struct mac_device_info *hw,
 					   u32 weight, u32 queue)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	void __iomem *ioaddr = hw->pcsr;
-	u32 value = readl(ioaddr + MTL_TXQX_WEIGHT_BASE_ADDR(queue));
+	u32 value = readl(ioaddr + mtl_txqx_weight_base_addr(dwmac4_addrs,
+							     queue));
 
 	value &= ~MTL_TXQ_WEIGHT_ISCQW_MASK;
 	value |= weight & MTL_TXQ_WEIGHT_ISCQW_MASK;
-	writel(value, ioaddr + MTL_TXQX_WEIGHT_BASE_ADDR(queue));
+	writel(value, ioaddr + mtl_txqx_weight_base_addr(dwmac4_addrs, queue));
 }
 
 static void dwmac4_map_mtl_dma(struct mac_device_info *hw, u32 queue, u32 chan)
@@ -233,6 +235,7 @@ static void dwmac4_config_cbs(struct stmmac_priv *priv,
 			      u32 send_slope, u32 idle_slope,
 			      u32 high_credit, u32 low_credit, u32 queue)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	void __iomem *ioaddr = hw->pcsr;
 	u32 value;
 
@@ -243,31 +246,33 @@ static void dwmac4_config_cbs(struct stmmac_priv *priv,
 	pr_debug("\tlow_credit: 0x%08x\n", low_credit);
 
 	/* enable AV algorithm */
-	value = readl(ioaddr + MTL_ETSX_CTRL_BASE_ADDR(queue));
+	value = readl(ioaddr + mtl_etsx_ctrl_base_addr(dwmac4_addrs, queue));
 	value |= MTL_ETS_CTRL_AVALG;
 	value |= MTL_ETS_CTRL_CC;
-	writel(value, ioaddr + MTL_ETSX_CTRL_BASE_ADDR(queue));
+	writel(value, ioaddr + mtl_etsx_ctrl_base_addr(dwmac4_addrs, queue));
 
 	/* configure send slope */
-	value = readl(ioaddr + MTL_SEND_SLP_CREDX_BASE_ADDR(queue));
+	value = readl(ioaddr + mtl_send_slp_credx_base_addr(dwmac4_addrs,
+							    queue));
 	value &= ~MTL_SEND_SLP_CRED_SSC_MASK;
 	value |= send_slope & MTL_SEND_SLP_CRED_SSC_MASK;
-	writel(value, ioaddr + MTL_SEND_SLP_CREDX_BASE_ADDR(queue));
+	writel(value, ioaddr + mtl_send_slp_credx_base_addr(dwmac4_addrs,
+							    queue));
 
 	/* configure idle slope (same register as tx weight) */
 	dwmac4_set_mtl_tx_queue_weight(priv, hw, idle_slope, queue);
 
 	/* configure high credit */
-	value = readl(ioaddr + MTL_HIGH_CREDX_BASE_ADDR(queue));
+	value = readl(ioaddr + mtl_high_credx_base_addr(dwmac4_addrs, queue));
 	value &= ~MTL_HIGH_CRED_HC_MASK;
 	value |= high_credit & MTL_HIGH_CRED_HC_MASK;
-	writel(value, ioaddr + MTL_HIGH_CREDX_BASE_ADDR(queue));
+	writel(value, ioaddr + mtl_high_credx_base_addr(dwmac4_addrs, queue));
 
 	/* configure high credit */
-	value = readl(ioaddr + MTL_LOW_CREDX_BASE_ADDR(queue));
+	value = readl(ioaddr + mtl_low_credx_base_addr(dwmac4_addrs, queue));
 	value &= ~MTL_HIGH_CRED_LC_MASK;
 	value |= low_credit & MTL_HIGH_CRED_LC_MASK;
-	writel(value, ioaddr + MTL_LOW_CREDX_BASE_ADDR(queue));
+	writel(value, ioaddr + mtl_low_credx_base_addr(dwmac4_addrs, queue));
 }
 
 static void dwmac4_dump_regs(struct mac_device_info *hw, u32 *reg_space)
@@ -764,6 +769,7 @@ static void dwmac4_phystatus(void __iomem *ioaddr, struct stmmac_extra_stats *x)
 static int dwmac4_irq_mtl_status(struct stmmac_priv *priv,
 				 struct mac_device_info *hw, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	void __iomem *ioaddr = hw->pcsr;
 	u32 mtl_int_qx_status;
 	int ret = 0;
@@ -773,12 +779,13 @@ static int dwmac4_irq_mtl_status(struct stmmac_priv *priv,
 	/* Check MTL Interrupt */
 	if (mtl_int_qx_status & MTL_INT_QX(chan)) {
 		/* read Queue x Interrupt status */
-		u32 status = readl(ioaddr + MTL_CHAN_INT_CTRL(chan));
+		u32 status = readl(ioaddr + MTL_CHAN_INT_CTRL(dwmac4_addrs,
+							      chan));
 
 		if (status & MTL_RX_OVERFLOW_INT) {
 			/*  clear Interrupt */
 			writel(status | MTL_RX_OVERFLOW_INT,
-			       ioaddr + MTL_CHAN_INT_CTRL(chan));
+			       ioaddr + MTL_CHAN_INT_CTRL(dwmac4_addrs, chan));
 			ret = CORE_IRQ_MTL_RX_OVERFLOW;
 		}
 	}
@@ -840,11 +847,12 @@ static void dwmac4_debug(struct stmmac_priv *priv, void __iomem *ioaddr,
 			 struct stmmac_extra_stats *x,
 			 u32 rx_queues, u32 tx_queues)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 	u32 queue;
 
 	for (queue = 0; queue < tx_queues; queue++) {
-		value = readl(ioaddr + MTL_CHAN_TX_DEBUG(queue));
+		value = readl(ioaddr + MTL_CHAN_TX_DEBUG(dwmac4_addrs, queue));
 
 		if (value & MTL_DEBUG_TXSTSFSTS)
 			x->mtl_tx_status_fifo_full++;
@@ -869,7 +877,7 @@ static void dwmac4_debug(struct stmmac_priv *priv, void __iomem *ioaddr,
 	}
 
 	for (queue = 0; queue < rx_queues; queue++) {
-		value = readl(ioaddr + MTL_CHAN_RX_DEBUG(queue));
+		value = readl(ioaddr + MTL_CHAN_RX_DEBUG(dwmac4_addrs, queue));
 
 		if (value & MTL_DEBUG_RXFSTS_MASK) {
 			u32 rxfsts = (value & MTL_DEBUG_RXFSTS_MASK)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
index 6f255d12f60f..84d3a8551b03 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
@@ -13,6 +13,7 @@
 #include <linux/io.h>
 #include "dwmac4.h"
 #include "dwmac4_dma.h"
+#include "stmmac.h"
 
 static void dwmac4_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
 {
@@ -73,18 +74,20 @@ static void dwmac4_dma_init_rx_chan(struct stmmac_priv *priv,
 				    struct stmmac_dma_cfg *dma_cfg,
 				    dma_addr_t dma_rx_phy, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 	u32 rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
 
-	value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 	value = value | (rxpbl << DMA_BUS_MODE_RPBL_SHIFT);
-	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 
 	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && likely(dma_cfg->eame))
 		writel(upper_32_bits(dma_rx_phy),
-		       ioaddr + DMA_CHAN_RX_BASE_ADDR_HI(chan));
+		       ioaddr + DMA_CHAN_RX_BASE_ADDR_HI(dwmac4_addrs, chan));
 
-	writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_CHAN_RX_BASE_ADDR(chan));
+	writel(lower_32_bits(dma_rx_phy),
+	       ioaddr + DMA_CHAN_RX_BASE_ADDR(dwmac4_addrs, chan));
 }
 
 static void dwmac4_dma_init_tx_chan(struct stmmac_priv *priv,
@@ -92,57 +95,61 @@ static void dwmac4_dma_init_tx_chan(struct stmmac_priv *priv,
 				    struct stmmac_dma_cfg *dma_cfg,
 				    dma_addr_t dma_tx_phy, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 	u32 txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
 
-	value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 	value = value | (txpbl << DMA_BUS_MODE_PBL_SHIFT);
 
 	/* Enable OSP to get best performance */
 	value |= DMA_CONTROL_OSP;
 
-	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
 	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && likely(dma_cfg->eame))
 		writel(upper_32_bits(dma_tx_phy),
-		       ioaddr + DMA_CHAN_TX_BASE_ADDR_HI(chan));
+		       ioaddr + DMA_CHAN_TX_BASE_ADDR_HI(dwmac4_addrs, chan));
 
-	writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_CHAN_TX_BASE_ADDR(chan));
+	writel(lower_32_bits(dma_tx_phy),
+	       ioaddr + DMA_CHAN_TX_BASE_ADDR(dwmac4_addrs, chan));
 }
 
 static void dwmac4_dma_init_channel(struct stmmac_priv *priv,
 				    void __iomem *ioaddr,
 				    struct stmmac_dma_cfg *dma_cfg, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 
 	/* common channel control register config */
-	value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
+	value = readl(ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 	if (dma_cfg->pblx8)
 		value = value | DMA_BUS_MODE_PBL;
-	writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 
 	/* Mask interrupts by writing to CSR7 */
 	writel(DMA_CHAN_INTR_DEFAULT_MASK,
-	       ioaddr + DMA_CHAN_INTR_ENA(chan));
+	       ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 static void dwmac410_dma_init_channel(struct stmmac_priv *priv,
 				      void __iomem *ioaddr,
 				      struct stmmac_dma_cfg *dma_cfg, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 
 	/* common channel control register config */
-	value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
+	value = readl(ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 	if (dma_cfg->pblx8)
 		value = value | DMA_BUS_MODE_PBL;
 
-	writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 
 	/* Mask interrupts by writing to CSR7 */
 	writel(DMA_CHAN_INTR_DEFAULT_MASK_4_10,
-	       ioaddr + DMA_CHAN_INTR_ENA(chan));
+	       ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 static void dwmac4_dma_init(void __iomem *ioaddr,
@@ -184,40 +191,46 @@ static void _dwmac4_dump_dma_regs(struct stmmac_priv *priv,
 				  void __iomem *ioaddr, u32 channel,
 				  u32 *reg_space)
 {
-	reg_space[DMA_CHAN_CONTROL(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_CONTROL(channel));
-	reg_space[DMA_CHAN_TX_CONTROL(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_TX_CONTROL(channel));
-	reg_space[DMA_CHAN_RX_CONTROL(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_RX_CONTROL(channel));
-	reg_space[DMA_CHAN_TX_BASE_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_TX_BASE_ADDR(channel));
-	reg_space[DMA_CHAN_RX_BASE_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_RX_BASE_ADDR(channel));
-	reg_space[DMA_CHAN_TX_END_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_TX_END_ADDR(channel));
-	reg_space[DMA_CHAN_RX_END_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_RX_END_ADDR(channel));
-	reg_space[DMA_CHAN_TX_RING_LEN(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_TX_RING_LEN(channel));
-	reg_space[DMA_CHAN_RX_RING_LEN(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_RX_RING_LEN(channel));
-	reg_space[DMA_CHAN_INTR_ENA(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_INTR_ENA(channel));
-	reg_space[DMA_CHAN_RX_WATCHDOG(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_RX_WATCHDOG(channel));
-	reg_space[DMA_CHAN_SLOT_CTRL_STATUS(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_SLOT_CTRL_STATUS(channel));
-	reg_space[DMA_CHAN_CUR_TX_DESC(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_CUR_TX_DESC(channel));
-	reg_space[DMA_CHAN_CUR_RX_DESC(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_CUR_RX_DESC(channel));
-	reg_space[DMA_CHAN_CUR_TX_BUF_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_CUR_TX_BUF_ADDR(channel));
-	reg_space[DMA_CHAN_CUR_RX_BUF_ADDR(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_CUR_RX_BUF_ADDR(channel));
-	reg_space[DMA_CHAN_STATUS(channel) / 4] =
-		readl(ioaddr + DMA_CHAN_STATUS(channel));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	const struct dwmac4_addrs *default_addrs = NULL;
+
+	/* Purposely save the registers in the "normal" layout, regardless of
+	 * platform modifications, to keep reg_space size constant
+	 */
+	reg_space[DMA_CHAN_CONTROL(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_TX_CONTROL(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_RX_CONTROL(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_TX_BASE_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_TX_BASE_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_RX_BASE_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_RX_BASE_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_TX_END_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_TX_END_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_RX_END_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_RX_END_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_TX_RING_LEN(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_TX_RING_LEN(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_RX_RING_LEN(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_RX_RING_LEN(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_INTR_ENA(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_RX_WATCHDOG(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_RX_WATCHDOG(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_SLOT_CTRL_STATUS(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_SLOT_CTRL_STATUS(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_CUR_TX_DESC(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_CUR_TX_DESC(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_CUR_RX_DESC(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_CUR_RX_DESC(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_CUR_TX_BUF_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_CUR_TX_BUF_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_CUR_RX_BUF_ADDR(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_CUR_RX_BUF_ADDR(dwmac4_addrs, channel));
+	reg_space[DMA_CHAN_STATUS(default_addrs, channel) / 4] =
+		readl(ioaddr + DMA_CHAN_STATUS(dwmac4_addrs, channel));
 }
 
 static void dwmac4_dump_dma_regs(struct stmmac_priv *priv, void __iomem *ioaddr,
@@ -232,17 +245,20 @@ static void dwmac4_dump_dma_regs(struct stmmac_priv *priv, void __iomem *ioaddr,
 static void dwmac4_rx_watchdog(struct stmmac_priv *priv, void __iomem *ioaddr,
 			       u32 riwt, u32 queue)
 {
-	writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(queue));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(dwmac4_addrs, queue));
 }
 
 static void dwmac4_dma_rx_chan_op_mode(struct stmmac_priv *priv,
 				       void __iomem *ioaddr, int mode,
 				       u32 channel, int fifosz, u8 qmode)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	unsigned int rqs = fifosz / 256 - 1;
 	u32 mtl_rx_op;
 
-	mtl_rx_op = readl(ioaddr + MTL_CHAN_RX_OP_MODE(channel));
+	mtl_rx_op = readl(ioaddr + MTL_CHAN_RX_OP_MODE(dwmac4_addrs, channel));
 
 	if (mode == SF_DMA_MODE) {
 		pr_debug("GMAC: enable RX store and forward mode\n");
@@ -300,14 +316,16 @@ static void dwmac4_dma_rx_chan_op_mode(struct stmmac_priv *priv,
 		mtl_rx_op |= rfa << MTL_OP_MODE_RFA_SHIFT;
 	}
 
-	writel(mtl_rx_op, ioaddr + MTL_CHAN_RX_OP_MODE(channel));
+	writel(mtl_rx_op, ioaddr + MTL_CHAN_RX_OP_MODE(dwmac4_addrs, channel));
 }
 
 static void dwmac4_dma_tx_chan_op_mode(struct stmmac_priv *priv,
 				       void __iomem *ioaddr, int mode,
 				       u32 channel, int fifosz, u8 qmode)
 {
-	u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(dwmac4_addrs,
+							   channel));
 	unsigned int tqs = fifosz / 256 - 1;
 
 	if (mode == SF_DMA_MODE) {
@@ -353,7 +371,7 @@ static void dwmac4_dma_tx_chan_op_mode(struct stmmac_priv *priv,
 	mtl_tx_op &= ~MTL_OP_MODE_TQS_MASK;
 	mtl_tx_op |= tqs << MTL_OP_MODE_TQS_SHIFT;
 
-	writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(channel));
+	writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(dwmac4_addrs, channel));
 }
 
 static int dwmac4_get_hw_feature(void __iomem *ioaddr,
@@ -454,25 +472,28 @@ static int dwmac4_get_hw_feature(void __iomem *ioaddr,
 static void dwmac4_enable_tso(struct stmmac_priv *priv, void __iomem *ioaddr,
 			      bool en, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value;
 
 	if (en) {
 		/* enable TSO */
-		value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+		value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 		writel(value | DMA_CONTROL_TSE,
-		       ioaddr + DMA_CHAN_TX_CONTROL(chan));
+		       ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 	} else {
 		/* enable TSO */
-		value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+		value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 		writel(value & ~DMA_CONTROL_TSE,
-		       ioaddr + DMA_CHAN_TX_CONTROL(chan));
+		       ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 	}
 }
 
 static void dwmac4_qmode(struct stmmac_priv *priv, void __iomem *ioaddr,
 			 u32 channel, u8 qmode)
 {
-	u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(dwmac4_addrs,
+							   channel));
 
 	mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK;
 	if (qmode != MTL_QUEUE_AVB)
@@ -480,50 +501,54 @@ static void dwmac4_qmode(struct stmmac_priv *priv, void __iomem *ioaddr,
 	else
 		mtl_tx_op |= MTL_OP_MODE_TXQEN_AV;
 
-	writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(channel));
+	writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(dwmac4_addrs, channel));
 }
 
 static void dwmac4_set_bfsize(struct stmmac_priv *priv, void __iomem *ioaddr,
 			      int bfsize, u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 
 	value &= ~DMA_RBSZ_MASK;
 	value |= (bfsize << DMA_RBSZ_SHIFT) & DMA_RBSZ_MASK;
 
-	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 }
 
 static void dwmac4_enable_sph(struct stmmac_priv *priv, void __iomem *ioaddr,
 			      bool en, u32 chan)
 {
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
 	u32 value = readl(ioaddr + GMAC_EXT_CONFIG);
 
 	value &= ~GMAC_CONFIG_HDSMS;
 	value |= GMAC_CONFIG_HDSMS_256; /* Segment max 256 bytes */
 	writel(value, ioaddr + GMAC_EXT_CONFIG);
 
-	value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
+	value = readl(ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 	if (en)
 		value |= DMA_CONTROL_SPH;
 	else
 		value &= ~DMA_CONTROL_SPH;
-	writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_CONTROL(dwmac4_addrs, chan));
 }
 
 static int dwmac4_enable_tbs(struct stmmac_priv *priv, void __iomem *ioaddr,
 			     bool en, u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
 	if (en)
 		value |= DMA_CONTROL_EDSE;
 	else
 		value &= ~DMA_CONTROL_EDSE;
 
-	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
-	value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)) & DMA_CONTROL_EDSE;
+	value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs,
+						   chan)) & DMA_CONTROL_EDSE;
 	if (en && !value)
 		return -EIO;
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
index 740c3bc8d9a0..358e7dcb6a9a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
@@ -95,29 +95,41 @@
 /* Following DMA defines are chanels oriented */
 #define DMA_CHAN_BASE_ADDR		0x00001100
 #define DMA_CHAN_BASE_OFFSET		0x80
-#define DMA_CHANX_BASE_ADDR(x)		(DMA_CHAN_BASE_ADDR + \
-					(x * DMA_CHAN_BASE_OFFSET))
+
+static inline u32 dma_chanx_base_addr(const struct dwmac4_addrs *addrs,
+				      const u32 x)
+{
+	u32 addr;
+
+	if (addrs)
+		addr = addrs->dma_chan + (x * addrs->dma_chan_offset);
+	else
+		addr = DMA_CHAN_BASE_ADDR + (x * DMA_CHAN_BASE_OFFSET);
+
+	return addr;
+}
+
 #define DMA_CHAN_REG_NUMBER		17
 
-#define DMA_CHAN_CONTROL(x)		DMA_CHANX_BASE_ADDR(x)
-#define DMA_CHAN_TX_CONTROL(x)		(DMA_CHANX_BASE_ADDR(x) + 0x4)
-#define DMA_CHAN_RX_CONTROL(x)		(DMA_CHANX_BASE_ADDR(x) + 0x8)
-#define DMA_CHAN_TX_BASE_ADDR_HI(x)	(DMA_CHANX_BASE_ADDR(x) + 0x10)
-#define DMA_CHAN_TX_BASE_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x14)
-#define DMA_CHAN_RX_BASE_ADDR_HI(x)	(DMA_CHANX_BASE_ADDR(x) + 0x18)
-#define DMA_CHAN_RX_BASE_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x1c)
-#define DMA_CHAN_TX_END_ADDR(x)		(DMA_CHANX_BASE_ADDR(x) + 0x20)
-#define DMA_CHAN_RX_END_ADDR(x)		(DMA_CHANX_BASE_ADDR(x) + 0x28)
-#define DMA_CHAN_TX_RING_LEN(x)		(DMA_CHANX_BASE_ADDR(x) + 0x2c)
-#define DMA_CHAN_RX_RING_LEN(x)		(DMA_CHANX_BASE_ADDR(x) + 0x30)
-#define DMA_CHAN_INTR_ENA(x)		(DMA_CHANX_BASE_ADDR(x) + 0x34)
-#define DMA_CHAN_RX_WATCHDOG(x)		(DMA_CHANX_BASE_ADDR(x) + 0x38)
-#define DMA_CHAN_SLOT_CTRL_STATUS(x)	(DMA_CHANX_BASE_ADDR(x) + 0x3c)
-#define DMA_CHAN_CUR_TX_DESC(x)		(DMA_CHANX_BASE_ADDR(x) + 0x44)
-#define DMA_CHAN_CUR_RX_DESC(x)		(DMA_CHANX_BASE_ADDR(x) + 0x4c)
-#define DMA_CHAN_CUR_TX_BUF_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x54)
-#define DMA_CHAN_CUR_RX_BUF_ADDR(x)	(DMA_CHANX_BASE_ADDR(x) + 0x5c)
-#define DMA_CHAN_STATUS(x)		(DMA_CHANX_BASE_ADDR(x) + 0x60)
+#define DMA_CHAN_CONTROL(addrs, x)	dma_chanx_base_addr(addrs, x)
+#define DMA_CHAN_TX_CONTROL(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x4)
+#define DMA_CHAN_RX_CONTROL(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x8)
+#define DMA_CHAN_TX_BASE_ADDR_HI(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x10)
+#define DMA_CHAN_TX_BASE_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x14)
+#define DMA_CHAN_RX_BASE_ADDR_HI(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x18)
+#define DMA_CHAN_RX_BASE_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x1c)
+#define DMA_CHAN_TX_END_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x20)
+#define DMA_CHAN_RX_END_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x28)
+#define DMA_CHAN_TX_RING_LEN(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x2c)
+#define DMA_CHAN_RX_RING_LEN(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x30)
+#define DMA_CHAN_INTR_ENA(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x34)
+#define DMA_CHAN_RX_WATCHDOG(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x38)
+#define DMA_CHAN_SLOT_CTRL_STATUS(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x3c)
+#define DMA_CHAN_CUR_TX_DESC(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x44)
+#define DMA_CHAN_CUR_RX_DESC(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x4c)
+#define DMA_CHAN_CUR_TX_BUF_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x54)
+#define DMA_CHAN_CUR_RX_BUF_ADDR(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x5c)
+#define DMA_CHAN_STATUS(addrs, x)	(dma_chanx_base_addr(addrs, x) + 0x60)
 
 /* DMA Control X */
 #define DMA_CONTROL_SPH			BIT(24)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
index 5e9c495aa03e..df41eac54058 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
@@ -11,6 +11,7 @@
 #include "common.h"
 #include "dwmac4_dma.h"
 #include "dwmac4.h"
+#include "stmmac.h"
 
 int dwmac4_dma_reset(void __iomem *ioaddr)
 {
@@ -28,22 +29,27 @@ int dwmac4_dma_reset(void __iomem *ioaddr)
 void dwmac4_set_rx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
 			    u32 tail_ptr, u32 chan)
 {
-	writel(tail_ptr, ioaddr + DMA_CHAN_RX_END_ADDR(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	writel(tail_ptr, ioaddr + DMA_CHAN_RX_END_ADDR(dwmac4_addrs, chan));
 }
 
 void dwmac4_set_tx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
 			    u32 tail_ptr, u32 chan)
 {
-	writel(tail_ptr, ioaddr + DMA_CHAN_TX_END_ADDR(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	writel(tail_ptr, ioaddr + DMA_CHAN_TX_END_ADDR(dwmac4_addrs, chan));
 }
 
 void dwmac4_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
 			 u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
 	value |= DMA_CONTROL_ST;
-	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
 	value = readl(ioaddr + GMAC_CONFIG);
 	value |= GMAC_CONFIG_TE;
@@ -53,20 +59,24 @@ void dwmac4_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
 void dwmac4_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
 			u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 
 	value &= ~DMA_CONTROL_ST;
-	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
 }
 
 void dwmac4_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
 			 u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 
 	value |= DMA_CONTROL_SR;
 
-	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 
 	value = readl(ioaddr + GMAC_CONFIG);
 	value |= GMAC_CONFIG_RE;
@@ -76,81 +86,91 @@ void dwmac4_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
 void dwmac4_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
 			u32 chan)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 
 	value &= ~DMA_CONTROL_SR;
-	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
+	writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
 }
 
 void dwmac4_set_tx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
 			    u32 len, u32 chan)
 {
-	writel(len, ioaddr + DMA_CHAN_TX_RING_LEN(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	writel(len, ioaddr + DMA_CHAN_TX_RING_LEN(dwmac4_addrs, chan));
 }
 
 void dwmac4_set_rx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
 			    u32 len, u32 chan)
 {
-	writel(len, ioaddr + DMA_CHAN_RX_RING_LEN(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+
+	writel(len, ioaddr + DMA_CHAN_RX_RING_LEN(dwmac4_addrs, chan));
 }
 
 void dwmac4_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
 			   u32 chan, bool rx, bool tx)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 
 	if (rx)
 		value |= DMA_CHAN_INTR_DEFAULT_RX;
 	if (tx)
 		value |= DMA_CHAN_INTR_DEFAULT_TX;
 
-	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 void dwmac410_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
 			     u32 chan, bool rx, bool tx)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 
 	if (rx)
 		value |= DMA_CHAN_INTR_DEFAULT_RX_4_10;
 	if (tx)
 		value |= DMA_CHAN_INTR_DEFAULT_TX_4_10;
 
-	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 void dwmac4_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
 			    u32 chan, bool rx, bool tx)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 
 	if (rx)
 		value &= ~DMA_CHAN_INTR_DEFAULT_RX;
 	if (tx)
 		value &= ~DMA_CHAN_INTR_DEFAULT_TX;
 
-	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 void dwmac410_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
 			      u32 chan, bool rx, bool tx)
 {
-	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 
 	if (rx)
 		value &= ~DMA_CHAN_INTR_DEFAULT_RX_4_10;
 	if (tx)
 		value &= ~DMA_CHAN_INTR_DEFAULT_TX_4_10;
 
-	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 }
 
 int dwmac4_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
 			 struct stmmac_extra_stats *x, u32 chan, u32 dir)
 {
-	u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(chan));
-	u32 intr_en = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+	const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
+	u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(dwmac4_addrs, chan));
+	u32 intr_en = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
 	int ret = 0;
 
 	if (dir == DMA_DIR_RX)
@@ -195,7 +215,8 @@ int dwmac4_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
 	if (unlikely(intr_status & DMA_CHAN_STATUS_ERI))
 		x->rx_early_irq++;
 
-	writel(intr_status & intr_en, ioaddr + DMA_CHAN_STATUS(chan));
+	writel(intr_status & intr_en,
+	       ioaddr + DMA_CHAN_STATUS(dwmac4_addrs, chan));
 	return ret;
 }
 
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index dafa001e9e7a..225751a8fd8e 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -186,6 +186,24 @@ struct stmmac_safety_feature_cfg {
 	u32 tmouten;
 };
 
+/* Addresses that may be customized by a platform */
+struct dwmac4_addrs {
+	u32 dma_chan;
+	u32 dma_chan_offset;
+	u32 mtl_chan;
+	u32 mtl_chan_offset;
+	u32 mtl_ets_ctrl;
+	u32 mtl_ets_ctrl_offset;
+	u32 mtl_txq_weight;
+	u32 mtl_txq_weight_offset;
+	u32 mtl_send_slp_cred;
+	u32 mtl_send_slp_cred_offset;
+	u32 mtl_high_cred;
+	u32 mtl_high_cred_offset;
+	u32 mtl_low_cred;
+	u32 mtl_low_cred_offset;
+};
+
 struct plat_stmmacenet_data {
 	int bus_id;
 	int phy_addr;
@@ -274,5 +292,6 @@ struct plat_stmmacenet_data {
 	bool use_phy_wol;
 	bool sph_disable;
 	bool serdes_up_after_phy_linkup;
+	const struct dwmac4_addrs *dwmac4_addrs;
 };
 #endif
-- 
2.39.2