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Date: Fri, 10 Nov 2023 17:25:42 +0800
From: Yanteng Si <siyanteng@...ngson.cn>
To: andrew@...n.ch,
hkallweit1@...il.com,
peppe.cavallaro@...com,
alexandre.torgue@...s.st.com,
joabreu@...opsys.com
Cc: Yanteng Si <siyanteng@...ngson.cn>,
fancer.lancer@...il.com,
Jose.Abreu@...opsys.com,
chenhuacai@...ngson.cn,
linux@...linux.org.uk,
dongbiao@...ngson.cn,
guyinggang@...ngson.cn,
netdev@...r.kernel.org,
loongarch@...ts.linux.dev,
chris.chenfeiyang@...il.com
Subject: [PATCH v5 3/9] net: stmmac: Add Loongson DWGMAC definitions
Loongson platforms use a DWGMAC which supports multi-channel.
There are two types of Loongson DWGMAC. The first type shares the same
register definitions and has similar logic as dwmac1000. The second type
uses several different register definitions.
Signed-off-by: Yanteng Si <siyanteng@...ngson.cn>
Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn>
Signed-off-by: Yinggang Gu <guyinggang@...ngson.cn>
---
drivers/net/ethernet/stmicro/stmmac/common.h | 1 +
.../ethernet/stmicro/stmmac/dwmac1000_dma.c | 63 ++++++++++++++++---
.../net/ethernet/stmicro/stmmac/dwmac_dma.h | 57 ++++++++++++++++-
.../net/ethernet/stmicro/stmmac/dwmac_lib.c | 39 ++++++------
drivers/net/ethernet/stmicro/stmmac/hwif.c | 3 +-
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +
6 files changed, 133 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index e3f650e88f82..e01584fe9efa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -34,6 +34,7 @@
#define DWMAC_CORE_5_00 0x50
#define DWMAC_CORE_5_10 0x51
#define DWMAC_CORE_5_20 0x52
+#define DWGMAC_CORE_1_00 0x10
#define DWXGMAC_CORE_2_10 0x21
#define DWXGMAC_CORE_2_20 0x22
#define DWXLGMAC_CORE_2_00 0x20
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
index ce0e6ca6f3a2..234d30c5a836 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
@@ -12,7 +12,8 @@
Author: Giuseppe Cavallaro <peppe.cavallaro@...com>
*******************************************************************************/
-#include <asm/io.h>
+#include <linux/io.h>
+#include "stmmac.h"
#include "dwmac1000.h"
#include "dwmac_dma.h"
@@ -111,13 +112,58 @@ static void dwmac1000_dma_init(struct stmmac_priv *priv, void __iomem *ioaddr,
writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
}
+static void dwmac1000_dma_init_channel(struct stmmac_priv *priv,
+ void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg, u32 chan)
+{
+ u32 value;
+ int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
+ int rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
+
+ if (!(priv->plat->flags & STMMAC_FLAG_MULTI_MSI_EN))
+ return;
+
+ /* common channel control register config */
+ value = readl(ioaddr + DMA_CHAN_BUS_MODE(chan));
+
+ /* Set the DMA PBL (Programmable Burst Length) mode.
+ *
+ * Note: before stmmac core 3.50 this mode bit was 4xPBL, and
+ * post 3.5 mode bit acts as 8*PBL.
+ */
+ if (dma_cfg->pblx8)
+ value |= DMA_BUS_MODE_MAXPBL;
+ value |= DMA_BUS_MODE_USP;
+ value &= ~(DMA_BUS_MODE_PBL_MASK | DMA_BUS_MODE_RPBL_MASK);
+ value |= (txpbl << DMA_BUS_MODE_PBL_SHIFT);
+ value |= (rxpbl << DMA_BUS_MODE_RPBL_SHIFT);
+
+ /* Set the Fixed burst mode */
+ if (dma_cfg->fixed_burst)
+ value |= DMA_BUS_MODE_FB;
+
+ /* Mixed Burst has no effect when fb is set */
+ if (dma_cfg->mixed_burst)
+ value |= DMA_BUS_MODE_MB;
+
+ value |= DMA_BUS_MODE_ATDS;
+
+ if (dma_cfg->aal)
+ value |= DMA_BUS_MODE_AAL;
+
+ writel(value, ioaddr + DMA_CHAN_BUS_MODE(chan));
+
+ /* Mask interrupts by writing to CSR7 */
+ writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_CHAN_INTR_ENA(chan));
+}
+
static void dwmac1000_dma_init_rx(struct stmmac_priv *priv,
void __iomem *ioaddr,
struct stmmac_dma_cfg *dma_cfg,
dma_addr_t dma_rx_phy, u32 chan)
{
/* RX descriptor base address list must be written into DMA CSR3 */
- writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_RCV_BASE_ADDR);
+ writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_CHAN_RCV_BASE_ADDR(chan));
}
static void dwmac1000_dma_init_tx(struct stmmac_priv *priv,
@@ -126,7 +172,7 @@ static void dwmac1000_dma_init_tx(struct stmmac_priv *priv,
dma_addr_t dma_tx_phy, u32 chan)
{
/* TX descriptor base address list must be written into DMA CSR4 */
- writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_TX_BASE_ADDR);
+ writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_CHAN_TX_BASE_ADDR(chan));
}
static u32 dwmac1000_configure_fc(u32 csr6, int rxfifosz)
@@ -154,7 +200,7 @@ static void dwmac1000_dma_operation_mode_rx(struct stmmac_priv *priv,
void __iomem *ioaddr, int mode,
u32 channel, int fifosz, u8 qmode)
{
- u32 csr6 = readl(ioaddr + DMA_CONTROL);
+ u32 csr6 = readl(ioaddr + DMA_CHAN_CONTROL(channel));
if (mode == SF_DMA_MODE) {
pr_debug("GMAC: enable RX store and forward mode\n");
@@ -176,14 +222,14 @@ static void dwmac1000_dma_operation_mode_rx(struct stmmac_priv *priv,
/* Configure flow control based on rx fifo size */
csr6 = dwmac1000_configure_fc(csr6, fifosz);
- writel(csr6, ioaddr + DMA_CONTROL);
+ writel(csr6, ioaddr + DMA_CHAN_CONTROL(channel));
}
static void dwmac1000_dma_operation_mode_tx(struct stmmac_priv *priv,
void __iomem *ioaddr, int mode,
u32 channel, int fifosz, u8 qmode)
{
- u32 csr6 = readl(ioaddr + DMA_CONTROL);
+ u32 csr6 = readl(ioaddr + DMA_CHAN_CONTROL(channel));
if (mode == SF_DMA_MODE) {
pr_debug("GMAC: enable TX store and forward mode\n");
@@ -210,7 +256,7 @@ static void dwmac1000_dma_operation_mode_tx(struct stmmac_priv *priv,
csr6 |= DMA_CONTROL_TTC_256;
}
- writel(csr6, ioaddr + DMA_CONTROL);
+ writel(csr6, ioaddr + DMA_CHAN_CONTROL(channel));
}
static void dwmac1000_dump_dma_regs(struct stmmac_priv *priv,
@@ -273,12 +319,13 @@ static int dwmac1000_get_hw_feature(struct stmmac_priv *priv,
static void dwmac1000_rx_watchdog(struct stmmac_priv *priv,
void __iomem *ioaddr, u32 riwt, u32 queue)
{
- writel(riwt, ioaddr + DMA_RX_WATCHDOG);
+ writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(queue));
}
const struct stmmac_dma_ops dwmac1000_dma_ops = {
.reset = dwmac_dma_reset,
.init = dwmac1000_dma_init,
+ .init_chan = dwmac1000_dma_init_channel,
.init_rx_chan = dwmac1000_dma_init_rx,
.init_tx_chan = dwmac1000_dma_init_tx,
.axi = dwmac1000_dma_axi,
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
index 77141391bd2f..90464e1c9649 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
@@ -76,8 +76,15 @@
#define DMA_INTR_ENA_RIE 0x00000040 /* Receive Interrupt */
#define DMA_INTR_ENA_ERE 0x00004000 /* Early Receive */
+#define DMA_INTR_ENA_NIE_LOONGSON 0x00060000 /* Loongson Normal Summary */
+
+#ifdef CONFIG_DWMAC_LOONGSON
+#define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE_LOONGSON | DMA_INTR_ENA_NIE | \
+ DMA_INTR_ENA_RIE | DMA_INTR_ENA_TIE)
+#else
#define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \
DMA_INTR_ENA_TIE)
+#endif
/* DMA Abnormal interrupt */
#define DMA_INTR_ENA_AIE 0x00008000 /* Abnormal Summary */
@@ -91,8 +98,15 @@
#define DMA_INTR_ENA_TJE 0x00000008 /* Transmit Jabber */
#define DMA_INTR_ENA_TSE 0x00000002 /* Transmit Stopped */
+#define DMA_INTR_ENA_AIE_LOONGSON 0x00018000 /* Loongson Abnormal Summary */
+
+#ifdef CONFIG_DWMAC_LOONGSON
+#define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE_LOONGSON | DMA_INTR_ENA_AIE | \
+ DMA_INTR_ENA_FBE | DMA_INTR_ENA_UNE)
+#else
#define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \
DMA_INTR_ENA_UNE)
+#endif
/* DMA default interrupt mask */
#define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
@@ -128,9 +142,29 @@
#define DMA_STATUS_TI 0x00000001 /* Transmit Interrupt */
#define DMA_CONTROL_FTF 0x00100000 /* Flush transmit FIFO */
-#define DMA_STATUS_MSK_COMMON (DMA_STATUS_NIS | \
- DMA_STATUS_AIS | \
- DMA_STATUS_FBI)
+#define DMA_STATUS_TX_NIS_LOONGSON 0x00040000 /* Normal Tx Interrupt Summary */
+#define DMA_STATUS_RX_NIS_LOONGSON 0x00020000 /* Normal Rx Interrupt Summary */
+#define DMA_STATUS_TX_AIS_LOONGSON 0x00010000 /* Abnormal Tx Interrupt Summary */
+#define DMA_STATUS_RX_AIS_LOONGSON 0x00008000 /* Abnormal Rx Interrupt Summary */
+#define DMA_STATUS_TX_FBI_LOONGSON 0x00002000 /* Fatal Tx Bus Error Interrupt */
+#define DMA_STATUS_RX_FBI_LOONGSON 0x00001000 /* Fatal Rx Bus Error Interrupt */
+
+#ifdef CONFIG_DWMAC_LOONGSON
+#define DMA_NOR_INTR_STATUS (DMA_STATUS_TX_NIS_LOONGSON | DMA_STATUS_RX_NIS_LOONGSON)
+#define DMA_ABNOR_INTR_STATUS (DMA_STATUS_TX_AIS_LOONGSON | DMA_STATUS_RX_AIS_LOONGSON)
+#define DMA_FB_INTR_STATUS (DMA_STATUS_TX_FBI_LOONGSON | DMA_STATUS_RX_FBI_LOONGSON)
+#else
+#define DMA_NOR_INTR_STATUS DMA_STATUS_NIS
+#define DMA_ABNOR_INTR_STATUS DMA_STATUS_AIS
+#define DMA_FB_INTR_STATUS DMA_STATUS_FBI
+#endif
+
+#define DMA_INTR_STATUS (DMA_STATUS_GPI | \
+ DMA_STATUS_GMI | \
+ DMA_STATUS_GLI)
+#define DMA_STATUS_MSK_COMMON (DMA_NOR_INTR_STATUS | \
+ DMA_ABNOR_INTR_STATUS | \
+ DMA_FB_INTR_STATUS)
#define DMA_STATUS_MSK_RX (DMA_STATUS_ERI | \
DMA_STATUS_RWT | \
@@ -148,6 +182,9 @@
DMA_STATUS_TI | \
DMA_STATUS_MSK_COMMON)
+/* Following DMA defines are chanels oriented */
+#define DMA_CHAN_OFFSET 0x100
+
#define NUM_DWMAC100_DMA_REGS 9
#define NUM_DWMAC1000_DMA_REGS 23
#define NUM_DWMAC4_DMA_REGS 27
@@ -170,4 +207,18 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
struct stmmac_extra_stats *x, u32 chan, u32 dir);
int dwmac_dma_reset(struct stmmac_priv *priv, void __iomem *ioaddr);
+static inline u32 dma_chan_base_addr(u32 base, u32 chan)
+{
+ return base + chan * DMA_CHAN_OFFSET;
+}
+
+#define DMA_CHAN_XMT_POLL_DEMAND(chan) dma_chan_base_addr(DMA_XMT_POLL_DEMAND, chan)
+#define DMA_CHAN_INTR_ENA(chan) dma_chan_base_addr(DMA_INTR_ENA, chan)
+#define DMA_CHAN_CONTROL(chan) dma_chan_base_addr(DMA_CONTROL, chan)
+#define DMA_CHAN_STATUS(chan) dma_chan_base_addr(DMA_STATUS, chan)
+#define DMA_CHAN_BUS_MODE(chan) dma_chan_base_addr(DMA_BUS_MODE, chan)
+#define DMA_CHAN_RCV_BASE_ADDR(chan) dma_chan_base_addr(DMA_RCV_BASE_ADDR, chan)
+#define DMA_CHAN_TX_BASE_ADDR(chan) dma_chan_base_addr(DMA_TX_BASE_ADDR, chan)
+#define DMA_CHAN_RX_WATCHDOG(chan) dma_chan_base_addr(DMA_RX_WATCHDOG, chan)
+
#endif /* __DWMAC_DMA_H__ */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
index 0cb337ffb7ac..c36aec97bbb5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
@@ -31,63 +31,63 @@ int dwmac_dma_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
void dwmac_enable_dma_transmission(struct stmmac_priv *priv,
void __iomem *ioaddr, u32 chan)
{
- writel(1, ioaddr + DMA_XMT_POLL_DEMAND);
+ writel(1, ioaddr + DMA_CHAN_XMT_POLL_DEMAND(chan));
}
void dwmac_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
- u32 value = readl(ioaddr + DMA_INTR_ENA);
+ u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
if (rx)
value |= DMA_INTR_DEFAULT_RX;
if (tx)
value |= DMA_INTR_DEFAULT_TX;
- writel(value, ioaddr + DMA_INTR_ENA);
+ writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
}
void dwmac_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
- u32 value = readl(ioaddr + DMA_INTR_ENA);
+ u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
if (rx)
value &= ~DMA_INTR_DEFAULT_RX;
if (tx)
value &= ~DMA_INTR_DEFAULT_TX;
- writel(value, ioaddr + DMA_INTR_ENA);
+ writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
}
void dwmac_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
- u32 value = readl(ioaddr + DMA_CONTROL);
+ u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
value |= DMA_CONTROL_ST;
- writel(value, ioaddr + DMA_CONTROL);
+ writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
}
void dwmac_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan)
{
- u32 value = readl(ioaddr + DMA_CONTROL);
+ u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
value &= ~DMA_CONTROL_ST;
- writel(value, ioaddr + DMA_CONTROL);
+ writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
}
void dwmac_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
- u32 value = readl(ioaddr + DMA_CONTROL);
+ u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
value |= DMA_CONTROL_SR;
- writel(value, ioaddr + DMA_CONTROL);
+ writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
}
void dwmac_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan)
{
- u32 value = readl(ioaddr + DMA_CONTROL);
+ u32 value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
value &= ~DMA_CONTROL_SR;
- writel(value, ioaddr + DMA_CONTROL);
+ writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
}
#ifdef DWMAC_DMA_DEBUG
@@ -167,7 +167,7 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
struct stmmac_txq_stats *txq_stats = &priv->xstats.txq_stats[chan];
int ret = 0;
/* read the status register (CSR5) */
- u32 intr_status = readl(ioaddr + DMA_STATUS);
+ u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(chan));
#ifdef DWMAC_DMA_DEBUG
/* Enable it to monitor DMA rx/tx status in case of critical problems */
@@ -182,7 +182,7 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
intr_status &= DMA_STATUS_MSK_TX;
/* ABNORMAL interrupts */
- if (unlikely(intr_status & DMA_STATUS_AIS)) {
+ if (unlikely(intr_status & DMA_ABNOR_INTR_STATUS)) {
if (unlikely(intr_status & DMA_STATUS_UNF)) {
ret = tx_hard_error_bump_tc;
x->tx_undeflow_irq++;
@@ -205,13 +205,13 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
x->tx_process_stopped_irq++;
ret = tx_hard_error;
}
- if (unlikely(intr_status & DMA_STATUS_FBI)) {
+ if (unlikely(intr_status & DMA_FB_INTR_STATUS)) {
x->fatal_bus_error_irq++;
ret = tx_hard_error;
}
}
/* TX/RX NORMAL interrupts */
- if (likely(intr_status & DMA_STATUS_NIS)) {
+ if (likely(intr_status & DMA_NOR_INTR_STATUS)) {
if (likely(intr_status & DMA_STATUS_RI)) {
u32 value = readl(ioaddr + DMA_INTR_ENA);
/* to schedule NAPI on real RIE event. */
@@ -232,12 +232,11 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
x->rx_early_irq++;
}
/* Optional hardware blocks, interrupts should be disabled */
- if (unlikely(intr_status &
- (DMA_STATUS_GPI | DMA_STATUS_GMI | DMA_STATUS_GLI)))
+ if (unlikely(intr_status & DMA_INTR_STATUS))
pr_warn("%s: unexpected status %08x\n", __func__, intr_status);
/* Clear the interrupt by writing a logic 1 to the CSR5[15-0] */
- writel((intr_status & 0x1ffff), ioaddr + DMA_STATUS);
+ writel((intr_status & 0x7ffff), ioaddr + DMA_CHAN_STATUS(chan));
return ret;
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
index 93cead5613e3..e5e7ac03459d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -58,7 +58,8 @@ static int stmmac_dwmac1_quirks(struct stmmac_priv *priv)
dev_info(priv->device, "Enhanced/Alternate descriptors\n");
/* GMAC older than 3.50 has no extended descriptors */
- if (priv->synopsys_id >= DWMAC_CORE_3_50) {
+ if (priv->synopsys_id >= DWMAC_CORE_3_50 ||
+ priv->synopsys_id == DWGMAC_CORE_1_00) {
dev_info(priv->device, "Enabled extended descriptors\n");
priv->extend_desc = 1;
} else {
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 7371713c116d..aafc75fa14a0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7062,6 +7062,7 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
/* dwmac-sun8i only work in chain mode */
if (priv->plat->flags & STMMAC_FLAG_HAS_SUN8I)
chain_mode = 1;
+
priv->chain_mode = chain_mode;
/* Initialize HW Interface */
@@ -7142,6 +7143,7 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
* riwt_off field from the platform.
*/
if (((priv->synopsys_id >= DWMAC_CORE_3_50) ||
+ (priv->synopsys_id == DWGMAC_CORE_1_00) ||
(priv->plat->has_xgmac)) && (!priv->plat->riwt_off)) {
priv->use_riwt = 1;
dev_info(priv->device,
--
2.31.4
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