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Message-Id: <d329a3315a3f274bc64c229d645f81066eb5cefe.1702990507.git.siyanteng@loongson.cn>
Date: Tue, 19 Dec 2023 22:17:07 +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,
guyinggang@...ngson.cn,
netdev@...r.kernel.org,
chris.chenfeiyang@...il.com
Subject: [PATCH net-next v7 4/9] net: stmmac: Add multi-channel supports
Loongson platforms use a DWGMAC which supports multi-channel.
Added dwmac1000_dma_init_channel() and init_chan(), factor out
all the channel-specific setups from dwmac1000_dma_init() to the
new function dma_config(), then distinguish dma initialization
and multi-channel initialization through different parameters.
Signed-off-by: Yanteng Si <siyanteng@...ngson.cn>
Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn>
Signed-off-by: Yinggang Gu <guyinggang@...ngson.cn>
---
.../ethernet/stmicro/stmmac/dwmac1000_dma.c | 55 ++++++++++++++-----
.../net/ethernet/stmicro/stmmac/dwmac_dma.h | 17 ++++++
.../net/ethernet/stmicro/stmmac/dwmac_lib.c | 30 +++++-----
3 files changed, 74 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
index 5e80d3eec9db..0fb48e683970 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"
@@ -70,13 +71,16 @@ static void dwmac1000_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
writel(value, ioaddr + DMA_AXI_BUS_MODE);
}
-static void dwmac1000_dma_init(struct stmmac_priv *priv, void __iomem *ioaddr,
- struct stmmac_dma_cfg *dma_cfg, int atds)
+static void dma_config(void __iomem *modeaddr, void __iomem *enaddr,
+ struct stmmac_dma_cfg *dma_cfg, u32 dma_intr_mask,
+ int atds)
{
- u32 value = readl(ioaddr + DMA_BUS_MODE);
+ u32 value;
int txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
int rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
+ value = readl(modeaddr);
+
/*
* Set the DMA PBL (Programmable Burst Length) mode.
*
@@ -104,10 +108,34 @@ static void dwmac1000_dma_init(struct stmmac_priv *priv, void __iomem *ioaddr,
if (dma_cfg->aal)
value |= DMA_BUS_MODE_AAL;
- writel(value, ioaddr + DMA_BUS_MODE);
+ writel(value, modeaddr);
+ writel(dma_intr_mask, enaddr);
+}
+
+static void dwmac1000_dma_init(struct stmmac_priv *priv, void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg, int atds)
+{
+ u32 dma_intr_mask;
/* Mask interrupts by writing to CSR7 */
- writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
+ dma_intr_mask = DMA_INTR_DEFAULT_MASK;
+
+ dma_config(ioaddr + DMA_BUS_MODE, ioaddr + DMA_INTR_ENA,
+ dma_cfg, dma_intr_mask, atds);
+}
+
+static void dwmac1000_dma_init_channel(struct stmmac_priv *priv, void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg, u32 chan)
+{
+ u32 dma_intr_mask;
+
+ /* Mask interrupts by writing to CSR7 */
+ dma_intr_mask = DMA_INTR_DEFAULT_MASK;
+
+ if (dma_cfg->multi_msi_en)
+ dma_config(ioaddr + DMA_CHAN_BUS_MODE(chan),
+ ioaddr + DMA_CHAN_INTR_ENA(chan), dma_cfg,
+ dma_intr_mask, dma_cfg->multi_msi_en);
}
static void dwmac1000_dma_init_rx(struct stmmac_priv *priv,
@@ -116,7 +144,7 @@ static void dwmac1000_dma_init_rx(struct stmmac_priv *priv,
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,
@@ -125,7 +153,7 @@ 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)
@@ -153,7 +181,7 @@ 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");
@@ -175,14 +203,14 @@ 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");
@@ -209,7 +237,7 @@ 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,
@@ -271,12 +299,13 @@ static int dwmac1000_get_hw_feature(void __iomem *ioaddr,
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 e7aef136824b..395d5e4c3922 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
@@ -148,6 +148,9 @@
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 +173,18 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
struct stmmac_extra_stats *x, u32 chan, u32 dir);
int dwmac_dma_reset(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 2f0df16fb7e4..968801c694e9 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(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 */
@@ -237,7 +237,7 @@ int dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
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;
}
--
2.31.4
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