Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 127 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
new file mode 100644
index 000000000..8f0d9bc7c
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
@@ -0,0 +1,127 @@
+// 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 <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include <asm/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)
+{
+	/* Enable Application Access by writing to DMA CSR0 */
+	writel(DMA_BUS_MODE_DEFAULT | (dma_cfg->pbl << DMA_BUS_MODE_PBL_SHIFT),
+	       ioaddr + DMA_BUS_MODE);
+
+	/* Mask interrupts by writing to CSR7 */
+	writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
+}
+
+static void dwmac100_dma_init_rx(void __iomem *ioaddr,
+				 struct stmmac_dma_cfg *dma_cfg,
+				 dma_addr_t dma_rx_phy, u32 chan)
+{
+	/* RX descriptor base addr lists must be written into DMA CSR3 */
+	writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_RCV_BASE_ADDR);
+}
+
+static void dwmac100_dma_init_tx(void __iomem *ioaddr,
+				 struct stmmac_dma_cfg *dma_cfg,
+				 dma_addr_t dma_tx_phy, u32 chan)
+{
+	/* TX descriptor base addr lists must be written into DMA CSR4 */
+	writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_TX_BASE_ADDR);
+}
+
+/* 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(void __iomem *ioaddr, int mode,
+					   u32 channel, int fifosz, u8 qmode)
+{
+	u32 csr6 = readl(ioaddr + DMA_CONTROL);
+
+	if (mode <= 32)
+		csr6 |= DMA_CONTROL_TTC_32;
+	else if (mode <= 64)
+		csr6 |= DMA_CONTROL_TTC_64;
+	else
+		csr6 |= DMA_CONTROL_TTC_128;
+
+	writel(csr6, ioaddr + DMA_CONTROL);
+}
+
+static void dwmac100_dump_dma_regs(void __iomem *ioaddr, u32 *reg_space)
+{
+	int i;
+
+	for (i = 0; i < NUM_DWMAC100_DMA_REGS; i++)
+		reg_space[DMA_BUS_MODE / 4 + i] =
+			readl(ioaddr + DMA_BUS_MODE + i * 4);
+
+	reg_space[DMA_CUR_TX_BUF_ADDR / 4] =
+		readl(ioaddr + DMA_CUR_TX_BUF_ADDR);
+	reg_space[DMA_CUR_RX_BUF_ADDR / 4] =
+		readl(ioaddr + DMA_CUR_RX_BUF_ADDR);
+}
+
+/* DMA controller has two counters to track the number of the missed frames. */
+static void dwmac100_dma_diagnostic_fr(void *data, struct stmmac_extra_stats *x,
+				       void __iomem *ioaddr)
+{
+	struct net_device_stats *stats = (struct net_device_stats *)data;
+	u32 csr8 = readl(ioaddr + DMA_MISSED_FRAME_CTR);
+
+	if (unlikely(csr8)) {
+		if (csr8 & DMA_MISSED_FRAME_OVE) {
+			stats->rx_over_errors += 0x800;
+			x->rx_overflow_cntr += 0x800;
+		} else {
+			unsigned int ove_cntr;
+			ove_cntr = ((csr8 & DMA_MISSED_FRAME_OVE_CNTR) >> 17);
+			stats->rx_over_errors += ove_cntr;
+			x->rx_overflow_cntr += ove_cntr;
+		}
+
+		if (csr8 & DMA_MISSED_FRAME_OVE_M) {
+			stats->rx_missed_errors += 0xffff;
+			x->rx_missed_cntr += 0xffff;
+		} else {
+			unsigned int miss_f = (csr8 & DMA_MISSED_FRAME_M_CNTR);
+			stats->rx_missed_errors += miss_f;
+			x->rx_missed_cntr += miss_f;
+		}
+	}
+}
+
+const struct stmmac_dma_ops dwmac100_dma_ops = {
+	.reset = dwmac_dma_reset,
+	.init = dwmac100_dma_init,
+	.init_rx_chan = dwmac100_dma_init_rx,
+	.init_tx_chan = dwmac100_dma_init_tx,
+	.dump_regs = dwmac100_dump_dma_regs,
+	.dma_tx_mode = dwmac100_dma_operation_mode_tx,
+	.dma_diagnostic_fr = dwmac100_dma_diagnostic_fr,
+	.enable_dma_transmission = dwmac_enable_dma_transmission,
+	.enable_dma_irq = dwmac_enable_dma_irq,
+	.disable_dma_irq = dwmac_disable_dma_irq,
+	.start_tx = dwmac_dma_start_tx,
+	.stop_tx = dwmac_dma_stop_tx,
+	.start_rx = dwmac_dma_start_rx,
+	.stop_rx = dwmac_dma_stop_rx,
+	.dma_interrupt = dwmac_dma_interrupt,
+};