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Diffstat (limited to 'drivers/net/ethernet/broadcom/genet/bcmgenet.c')
-rw-r--r--drivers/net/ethernet/broadcom/genet/bcmgenet.c4371
1 files changed, 4371 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
new file mode 100644
index 000000000..c2a991308
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -0,0 +1,4371 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Broadcom GENET (Gigabit Ethernet) controller driver
+ *
+ * Copyright (c) 2014-2020 Broadcom
+ */
+
+#define pr_fmt(fmt) "bcmgenet: " fmt
+
+#include <linux/acpi.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/if_ether.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm.h>
+#include <linux/clk.h>
+#include <net/arp.h>
+
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/phy.h>
+#include <linux/platform_data/bcmgenet.h>
+
+#include <asm/unaligned.h>
+
+#include "bcmgenet.h"
+
+/* Maximum number of hardware queues, downsized if needed */
+#define GENET_MAX_MQ_CNT 4
+
+/* Default highest priority queue for multi queue support */
+#define GENET_Q0_PRIORITY 0
+
+#define GENET_Q16_RX_BD_CNT \
+ (TOTAL_DESC - priv->hw_params->rx_queues * priv->hw_params->rx_bds_per_q)
+#define GENET_Q16_TX_BD_CNT \
+ (TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->tx_bds_per_q)
+
+#define RX_BUF_LENGTH 2048
+#define SKB_ALIGNMENT 32
+
+/* Tx/Rx DMA register offset, skip 256 descriptors */
+#define WORDS_PER_BD(p) (p->hw_params->words_per_bd)
+#define DMA_DESC_SIZE (WORDS_PER_BD(priv) * sizeof(u32))
+
+#define GENET_TDMA_REG_OFF (priv->hw_params->tdma_offset + \
+ TOTAL_DESC * DMA_DESC_SIZE)
+
+#define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \
+ TOTAL_DESC * DMA_DESC_SIZE)
+
+/* Forward declarations */
+static void bcmgenet_set_rx_mode(struct net_device *dev);
+
+static inline void bcmgenet_writel(u32 value, void __iomem *offset)
+{
+ /* MIPS chips strapped for BE will automagically configure the
+ * peripheral registers for CPU-native byte order.
+ */
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ __raw_writel(value, offset);
+ else
+ writel_relaxed(value, offset);
+}
+
+static inline u32 bcmgenet_readl(void __iomem *offset)
+{
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ return __raw_readl(offset);
+ else
+ return readl_relaxed(offset);
+}
+
+static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv,
+ void __iomem *d, u32 value)
+{
+ bcmgenet_writel(value, d + DMA_DESC_LENGTH_STATUS);
+}
+
+static inline void dmadesc_set_addr(struct bcmgenet_priv *priv,
+ void __iomem *d,
+ dma_addr_t addr)
+{
+ bcmgenet_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO);
+
+ /* Register writes to GISB bus can take couple hundred nanoseconds
+ * and are done for each packet, save these expensive writes unless
+ * the platform is explicitly configured for 64-bits/LPAE.
+ */
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+ if (priv->hw_params->flags & GENET_HAS_40BITS)
+ bcmgenet_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI);
+#endif
+}
+
+/* Combined address + length/status setter */
+static inline void dmadesc_set(struct bcmgenet_priv *priv,
+ void __iomem *d, dma_addr_t addr, u32 val)
+{
+ dmadesc_set_addr(priv, d, addr);
+ dmadesc_set_length_status(priv, d, val);
+}
+
+static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
+ void __iomem *d)
+{
+ dma_addr_t addr;
+
+ addr = bcmgenet_readl(d + DMA_DESC_ADDRESS_LO);
+
+ /* Register writes to GISB bus can take couple hundred nanoseconds
+ * and are done for each packet, save these expensive writes unless
+ * the platform is explicitly configured for 64-bits/LPAE.
+ */
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+ if (priv->hw_params->flags & GENET_HAS_40BITS)
+ addr |= (u64)bcmgenet_readl(d + DMA_DESC_ADDRESS_HI) << 32;
+#endif
+ return addr;
+}
+
+#define GENET_VER_FMT "%1d.%1d EPHY: 0x%04x"
+
+#define GENET_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
+ NETIF_MSG_LINK)
+
+static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
+{
+ if (GENET_IS_V1(priv))
+ return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
+ else
+ return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
+}
+
+static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
+{
+ if (GENET_IS_V1(priv))
+ bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
+ else
+ bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
+}
+
+/* These macros are defined to deal with register map change
+ * between GENET1.1 and GENET2. Only those currently being used
+ * by driver are defined.
+ */
+static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
+{
+ if (GENET_IS_V1(priv))
+ return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
+ else
+ return bcmgenet_readl(priv->base +
+ priv->hw_params->tbuf_offset + TBUF_CTRL);
+}
+
+static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
+{
+ if (GENET_IS_V1(priv))
+ bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
+ else
+ bcmgenet_writel(val, priv->base +
+ priv->hw_params->tbuf_offset + TBUF_CTRL);
+}
+
+static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
+{
+ if (GENET_IS_V1(priv))
+ return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
+ else
+ return bcmgenet_readl(priv->base +
+ priv->hw_params->tbuf_offset + TBUF_BP_MC);
+}
+
+static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
+{
+ if (GENET_IS_V1(priv))
+ bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
+ else
+ bcmgenet_writel(val, priv->base +
+ priv->hw_params->tbuf_offset + TBUF_BP_MC);
+}
+
+/* RX/TX DMA register accessors */
+enum dma_reg {
+ DMA_RING_CFG = 0,
+ DMA_CTRL,
+ DMA_STATUS,
+ DMA_SCB_BURST_SIZE,
+ DMA_ARB_CTRL,
+ DMA_PRIORITY_0,
+ DMA_PRIORITY_1,
+ DMA_PRIORITY_2,
+ DMA_INDEX2RING_0,
+ DMA_INDEX2RING_1,
+ DMA_INDEX2RING_2,
+ DMA_INDEX2RING_3,
+ DMA_INDEX2RING_4,
+ DMA_INDEX2RING_5,
+ DMA_INDEX2RING_6,
+ DMA_INDEX2RING_7,
+ DMA_RING0_TIMEOUT,
+ DMA_RING1_TIMEOUT,
+ DMA_RING2_TIMEOUT,
+ DMA_RING3_TIMEOUT,
+ DMA_RING4_TIMEOUT,
+ DMA_RING5_TIMEOUT,
+ DMA_RING6_TIMEOUT,
+ DMA_RING7_TIMEOUT,
+ DMA_RING8_TIMEOUT,
+ DMA_RING9_TIMEOUT,
+ DMA_RING10_TIMEOUT,
+ DMA_RING11_TIMEOUT,
+ DMA_RING12_TIMEOUT,
+ DMA_RING13_TIMEOUT,
+ DMA_RING14_TIMEOUT,
+ DMA_RING15_TIMEOUT,
+ DMA_RING16_TIMEOUT,
+};
+
+static const u8 bcmgenet_dma_regs_v3plus[] = {
+ [DMA_RING_CFG] = 0x00,
+ [DMA_CTRL] = 0x04,
+ [DMA_STATUS] = 0x08,
+ [DMA_SCB_BURST_SIZE] = 0x0C,
+ [DMA_ARB_CTRL] = 0x2C,
+ [DMA_PRIORITY_0] = 0x30,
+ [DMA_PRIORITY_1] = 0x34,
+ [DMA_PRIORITY_2] = 0x38,
+ [DMA_RING0_TIMEOUT] = 0x2C,
+ [DMA_RING1_TIMEOUT] = 0x30,
+ [DMA_RING2_TIMEOUT] = 0x34,
+ [DMA_RING3_TIMEOUT] = 0x38,
+ [DMA_RING4_TIMEOUT] = 0x3c,
+ [DMA_RING5_TIMEOUT] = 0x40,
+ [DMA_RING6_TIMEOUT] = 0x44,
+ [DMA_RING7_TIMEOUT] = 0x48,
+ [DMA_RING8_TIMEOUT] = 0x4c,
+ [DMA_RING9_TIMEOUT] = 0x50,
+ [DMA_RING10_TIMEOUT] = 0x54,
+ [DMA_RING11_TIMEOUT] = 0x58,
+ [DMA_RING12_TIMEOUT] = 0x5c,
+ [DMA_RING13_TIMEOUT] = 0x60,
+ [DMA_RING14_TIMEOUT] = 0x64,
+ [DMA_RING15_TIMEOUT] = 0x68,
+ [DMA_RING16_TIMEOUT] = 0x6C,
+ [DMA_INDEX2RING_0] = 0x70,
+ [DMA_INDEX2RING_1] = 0x74,
+ [DMA_INDEX2RING_2] = 0x78,
+ [DMA_INDEX2RING_3] = 0x7C,
+ [DMA_INDEX2RING_4] = 0x80,
+ [DMA_INDEX2RING_5] = 0x84,
+ [DMA_INDEX2RING_6] = 0x88,
+ [DMA_INDEX2RING_7] = 0x8C,
+};
+
+static const u8 bcmgenet_dma_regs_v2[] = {
+ [DMA_RING_CFG] = 0x00,
+ [DMA_CTRL] = 0x04,
+ [DMA_STATUS] = 0x08,
+ [DMA_SCB_BURST_SIZE] = 0x0C,
+ [DMA_ARB_CTRL] = 0x30,
+ [DMA_PRIORITY_0] = 0x34,
+ [DMA_PRIORITY_1] = 0x38,
+ [DMA_PRIORITY_2] = 0x3C,
+ [DMA_RING0_TIMEOUT] = 0x2C,
+ [DMA_RING1_TIMEOUT] = 0x30,
+ [DMA_RING2_TIMEOUT] = 0x34,
+ [DMA_RING3_TIMEOUT] = 0x38,
+ [DMA_RING4_TIMEOUT] = 0x3c,
+ [DMA_RING5_TIMEOUT] = 0x40,
+ [DMA_RING6_TIMEOUT] = 0x44,
+ [DMA_RING7_TIMEOUT] = 0x48,
+ [DMA_RING8_TIMEOUT] = 0x4c,
+ [DMA_RING9_TIMEOUT] = 0x50,
+ [DMA_RING10_TIMEOUT] = 0x54,
+ [DMA_RING11_TIMEOUT] = 0x58,
+ [DMA_RING12_TIMEOUT] = 0x5c,
+ [DMA_RING13_TIMEOUT] = 0x60,
+ [DMA_RING14_TIMEOUT] = 0x64,
+ [DMA_RING15_TIMEOUT] = 0x68,
+ [DMA_RING16_TIMEOUT] = 0x6C,
+};
+
+static const u8 bcmgenet_dma_regs_v1[] = {
+ [DMA_CTRL] = 0x00,
+ [DMA_STATUS] = 0x04,
+ [DMA_SCB_BURST_SIZE] = 0x0C,
+ [DMA_ARB_CTRL] = 0x30,
+ [DMA_PRIORITY_0] = 0x34,
+ [DMA_PRIORITY_1] = 0x38,
+ [DMA_PRIORITY_2] = 0x3C,
+ [DMA_RING0_TIMEOUT] = 0x2C,
+ [DMA_RING1_TIMEOUT] = 0x30,
+ [DMA_RING2_TIMEOUT] = 0x34,
+ [DMA_RING3_TIMEOUT] = 0x38,
+ [DMA_RING4_TIMEOUT] = 0x3c,
+ [DMA_RING5_TIMEOUT] = 0x40,
+ [DMA_RING6_TIMEOUT] = 0x44,
+ [DMA_RING7_TIMEOUT] = 0x48,
+ [DMA_RING8_TIMEOUT] = 0x4c,
+ [DMA_RING9_TIMEOUT] = 0x50,
+ [DMA_RING10_TIMEOUT] = 0x54,
+ [DMA_RING11_TIMEOUT] = 0x58,
+ [DMA_RING12_TIMEOUT] = 0x5c,
+ [DMA_RING13_TIMEOUT] = 0x60,
+ [DMA_RING14_TIMEOUT] = 0x64,
+ [DMA_RING15_TIMEOUT] = 0x68,
+ [DMA_RING16_TIMEOUT] = 0x6C,
+};
+
+/* Set at runtime once bcmgenet version is known */
+static const u8 *bcmgenet_dma_regs;
+
+static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
+{
+ return netdev_priv(dev_get_drvdata(dev));
+}
+
+static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
+ enum dma_reg r)
+{
+ return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
+ DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
+}
+
+static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
+ u32 val, enum dma_reg r)
+{
+ bcmgenet_writel(val, priv->base + GENET_TDMA_REG_OFF +
+ DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
+}
+
+static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
+ enum dma_reg r)
+{
+ return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
+ DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
+}
+
+static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
+ u32 val, enum dma_reg r)
+{
+ bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
+ DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
+}
+
+/* RDMA/TDMA ring registers and accessors
+ * we merge the common fields and just prefix with T/D the registers
+ * having different meaning depending on the direction
+ */
+enum dma_ring_reg {
+ TDMA_READ_PTR = 0,
+ RDMA_WRITE_PTR = TDMA_READ_PTR,
+ TDMA_READ_PTR_HI,
+ RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
+ TDMA_CONS_INDEX,
+ RDMA_PROD_INDEX = TDMA_CONS_INDEX,
+ TDMA_PROD_INDEX,
+ RDMA_CONS_INDEX = TDMA_PROD_INDEX,
+ DMA_RING_BUF_SIZE,
+ DMA_START_ADDR,
+ DMA_START_ADDR_HI,
+ DMA_END_ADDR,
+ DMA_END_ADDR_HI,
+ DMA_MBUF_DONE_THRESH,
+ TDMA_FLOW_PERIOD,
+ RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
+ TDMA_WRITE_PTR,
+ RDMA_READ_PTR = TDMA_WRITE_PTR,
+ TDMA_WRITE_PTR_HI,
+ RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
+};
+
+/* GENET v4 supports 40-bits pointer addressing
+ * for obvious reasons the LO and HI word parts
+ * are contiguous, but this offsets the other
+ * registers.
+ */
+static const u8 genet_dma_ring_regs_v4[] = {
+ [TDMA_READ_PTR] = 0x00,
+ [TDMA_READ_PTR_HI] = 0x04,
+ [TDMA_CONS_INDEX] = 0x08,
+ [TDMA_PROD_INDEX] = 0x0C,
+ [DMA_RING_BUF_SIZE] = 0x10,
+ [DMA_START_ADDR] = 0x14,
+ [DMA_START_ADDR_HI] = 0x18,
+ [DMA_END_ADDR] = 0x1C,
+ [DMA_END_ADDR_HI] = 0x20,
+ [DMA_MBUF_DONE_THRESH] = 0x24,
+ [TDMA_FLOW_PERIOD] = 0x28,
+ [TDMA_WRITE_PTR] = 0x2C,
+ [TDMA_WRITE_PTR_HI] = 0x30,
+};
+
+static const u8 genet_dma_ring_regs_v123[] = {
+ [TDMA_READ_PTR] = 0x00,
+ [TDMA_CONS_INDEX] = 0x04,
+ [TDMA_PROD_INDEX] = 0x08,
+ [DMA_RING_BUF_SIZE] = 0x0C,
+ [DMA_START_ADDR] = 0x10,
+ [DMA_END_ADDR] = 0x14,
+ [DMA_MBUF_DONE_THRESH] = 0x18,
+ [TDMA_FLOW_PERIOD] = 0x1C,
+ [TDMA_WRITE_PTR] = 0x20,
+};
+
+/* Set at runtime once GENET version is known */
+static const u8 *genet_dma_ring_regs;
+
+static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
+ unsigned int ring,
+ enum dma_ring_reg r)
+{
+ return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
+ (DMA_RING_SIZE * ring) +
+ genet_dma_ring_regs[r]);
+}
+
+static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv,
+ unsigned int ring, u32 val,
+ enum dma_ring_reg r)
+{
+ bcmgenet_writel(val, priv->base + GENET_TDMA_REG_OFF +
+ (DMA_RING_SIZE * ring) +
+ genet_dma_ring_regs[r]);
+}
+
+static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
+ unsigned int ring,
+ enum dma_ring_reg r)
+{
+ return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
+ (DMA_RING_SIZE * ring) +
+ genet_dma_ring_regs[r]);
+}
+
+static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
+ unsigned int ring, u32 val,
+ enum dma_ring_reg r)
+{
+ bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
+ (DMA_RING_SIZE * ring) +
+ genet_dma_ring_regs[r]);
+}
+
+static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
+{
+ u32 offset;
+ u32 reg;
+
+ offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
+ reg = bcmgenet_hfb_reg_readl(priv, offset);
+ reg |= (1 << (f_index % 32));
+ bcmgenet_hfb_reg_writel(priv, reg, offset);
+ reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
+ reg |= RBUF_HFB_EN;
+ bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
+}
+
+static void bcmgenet_hfb_disable_filter(struct bcmgenet_priv *priv, u32 f_index)
+{
+ u32 offset, reg, reg1;
+
+ offset = HFB_FLT_ENABLE_V3PLUS;
+ reg = bcmgenet_hfb_reg_readl(priv, offset);
+ reg1 = bcmgenet_hfb_reg_readl(priv, offset + sizeof(u32));
+ if (f_index < 32) {
+ reg1 &= ~(1 << (f_index % 32));
+ bcmgenet_hfb_reg_writel(priv, reg1, offset + sizeof(u32));
+ } else {
+ reg &= ~(1 << (f_index % 32));
+ bcmgenet_hfb_reg_writel(priv, reg, offset);
+ }
+ if (!reg && !reg1) {
+ reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
+ reg &= ~RBUF_HFB_EN;
+ bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
+ }
+}
+
+static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
+ u32 f_index, u32 rx_queue)
+{
+ u32 offset;
+ u32 reg;
+
+ offset = f_index / 8;
+ reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
+ reg &= ~(0xF << (4 * (f_index % 8)));
+ reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
+ bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
+}
+
+static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
+ u32 f_index, u32 f_length)
+{
+ u32 offset;
+ u32 reg;
+
+ offset = HFB_FLT_LEN_V3PLUS +
+ ((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
+ sizeof(u32);
+ reg = bcmgenet_hfb_reg_readl(priv, offset);
+ reg &= ~(0xFF << (8 * (f_index % 4)));
+ reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
+ bcmgenet_hfb_reg_writel(priv, reg, offset);
+}
+
+static int bcmgenet_hfb_validate_mask(void *mask, size_t size)
+{
+ while (size) {
+ switch (*(unsigned char *)mask++) {
+ case 0x00:
+ case 0x0f:
+ case 0xf0:
+ case 0xff:
+ size--;
+ continue;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+#define VALIDATE_MASK(x) \
+ bcmgenet_hfb_validate_mask(&(x), sizeof(x))
+
+static int bcmgenet_hfb_insert_data(struct bcmgenet_priv *priv, u32 f_index,
+ u32 offset, void *val, void *mask,
+ size_t size)
+{
+ u32 index, tmp;
+
+ index = f_index * priv->hw_params->hfb_filter_size + offset / 2;
+ tmp = bcmgenet_hfb_readl(priv, index * sizeof(u32));
+
+ while (size--) {
+ if (offset++ & 1) {
+ tmp &= ~0x300FF;
+ tmp |= (*(unsigned char *)val++);
+ switch ((*(unsigned char *)mask++)) {
+ case 0xFF:
+ tmp |= 0x30000;
+ break;
+ case 0xF0:
+ tmp |= 0x20000;
+ break;
+ case 0x0F:
+ tmp |= 0x10000;
+ break;
+ }
+ bcmgenet_hfb_writel(priv, tmp, index++ * sizeof(u32));
+ if (size)
+ tmp = bcmgenet_hfb_readl(priv,
+ index * sizeof(u32));
+ } else {
+ tmp &= ~0xCFF00;
+ tmp |= (*(unsigned char *)val++) << 8;
+ switch ((*(unsigned char *)mask++)) {
+ case 0xFF:
+ tmp |= 0xC0000;
+ break;
+ case 0xF0:
+ tmp |= 0x80000;
+ break;
+ case 0x0F:
+ tmp |= 0x40000;
+ break;
+ }
+ if (!size)
+ bcmgenet_hfb_writel(priv, tmp, index * sizeof(u32));
+ }
+ }
+
+ return 0;
+}
+
+static void bcmgenet_hfb_create_rxnfc_filter(struct bcmgenet_priv *priv,
+ struct bcmgenet_rxnfc_rule *rule)
+{
+ struct ethtool_rx_flow_spec *fs = &rule->fs;
+ u32 offset = 0, f_length = 0, f;
+ u8 val_8, mask_8;
+ __be16 val_16;
+ u16 mask_16;
+ size_t size;
+
+ f = fs->location;
+ if (fs->flow_type & FLOW_MAC_EXT) {
+ bcmgenet_hfb_insert_data(priv, f, 0,
+ &fs->h_ext.h_dest, &fs->m_ext.h_dest,
+ sizeof(fs->h_ext.h_dest));
+ }
+
+ if (fs->flow_type & FLOW_EXT) {
+ if (fs->m_ext.vlan_etype ||
+ fs->m_ext.vlan_tci) {
+ bcmgenet_hfb_insert_data(priv, f, 12,
+ &fs->h_ext.vlan_etype,
+ &fs->m_ext.vlan_etype,
+ sizeof(fs->h_ext.vlan_etype));
+ bcmgenet_hfb_insert_data(priv, f, 14,
+ &fs->h_ext.vlan_tci,
+ &fs->m_ext.vlan_tci,
+ sizeof(fs->h_ext.vlan_tci));
+ offset += VLAN_HLEN;
+ f_length += DIV_ROUND_UP(VLAN_HLEN, 2);
+ }
+ }
+
+ switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
+ case ETHER_FLOW:
+ f_length += DIV_ROUND_UP(ETH_HLEN, 2);
+ bcmgenet_hfb_insert_data(priv, f, 0,
+ &fs->h_u.ether_spec.h_dest,
+ &fs->m_u.ether_spec.h_dest,
+ sizeof(fs->h_u.ether_spec.h_dest));
+ bcmgenet_hfb_insert_data(priv, f, ETH_ALEN,
+ &fs->h_u.ether_spec.h_source,
+ &fs->m_u.ether_spec.h_source,
+ sizeof(fs->h_u.ether_spec.h_source));
+ bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
+ &fs->h_u.ether_spec.h_proto,
+ &fs->m_u.ether_spec.h_proto,
+ sizeof(fs->h_u.ether_spec.h_proto));
+ break;
+ case IP_USER_FLOW:
+ f_length += DIV_ROUND_UP(ETH_HLEN + 20, 2);
+ /* Specify IP Ether Type */
+ val_16 = htons(ETH_P_IP);
+ mask_16 = 0xFFFF;
+ bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
+ &val_16, &mask_16, sizeof(val_16));
+ bcmgenet_hfb_insert_data(priv, f, 15 + offset,
+ &fs->h_u.usr_ip4_spec.tos,
+ &fs->m_u.usr_ip4_spec.tos,
+ sizeof(fs->h_u.usr_ip4_spec.tos));
+ bcmgenet_hfb_insert_data(priv, f, 23 + offset,
+ &fs->h_u.usr_ip4_spec.proto,
+ &fs->m_u.usr_ip4_spec.proto,
+ sizeof(fs->h_u.usr_ip4_spec.proto));
+ bcmgenet_hfb_insert_data(priv, f, 26 + offset,
+ &fs->h_u.usr_ip4_spec.ip4src,
+ &fs->m_u.usr_ip4_spec.ip4src,
+ sizeof(fs->h_u.usr_ip4_spec.ip4src));
+ bcmgenet_hfb_insert_data(priv, f, 30 + offset,
+ &fs->h_u.usr_ip4_spec.ip4dst,
+ &fs->m_u.usr_ip4_spec.ip4dst,
+ sizeof(fs->h_u.usr_ip4_spec.ip4dst));
+ if (!fs->m_u.usr_ip4_spec.l4_4_bytes)
+ break;
+
+ /* Only supports 20 byte IPv4 header */
+ val_8 = 0x45;
+ mask_8 = 0xFF;
+ bcmgenet_hfb_insert_data(priv, f, ETH_HLEN + offset,
+ &val_8, &mask_8,
+ sizeof(val_8));
+ size = sizeof(fs->h_u.usr_ip4_spec.l4_4_bytes);
+ bcmgenet_hfb_insert_data(priv, f,
+ ETH_HLEN + 20 + offset,
+ &fs->h_u.usr_ip4_spec.l4_4_bytes,
+ &fs->m_u.usr_ip4_spec.l4_4_bytes,
+ size);
+ f_length += DIV_ROUND_UP(size, 2);
+ break;
+ }
+
+ bcmgenet_hfb_set_filter_length(priv, f, 2 * f_length);
+ if (!fs->ring_cookie || fs->ring_cookie == RX_CLS_FLOW_WAKE) {
+ /* Ring 0 flows can be handled by the default Descriptor Ring
+ * We'll map them to ring 0, but don't enable the filter
+ */
+ bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f, 0);
+ rule->state = BCMGENET_RXNFC_STATE_DISABLED;
+ } else {
+ /* Other Rx rings are direct mapped here */
+ bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f,
+ fs->ring_cookie);
+ bcmgenet_hfb_enable_filter(priv, f);
+ rule->state = BCMGENET_RXNFC_STATE_ENABLED;
+ }
+}
+
+/* bcmgenet_hfb_clear
+ *
+ * Clear Hardware Filter Block and disable all filtering.
+ */
+static void bcmgenet_hfb_clear_filter(struct bcmgenet_priv *priv, u32 f_index)
+{
+ u32 base, i;
+
+ base = f_index * priv->hw_params->hfb_filter_size;
+ for (i = 0; i < priv->hw_params->hfb_filter_size; i++)
+ bcmgenet_hfb_writel(priv, 0x0, (base + i) * sizeof(u32));
+}
+
+static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
+{
+ u32 i;
+
+ if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
+ return;
+
+ bcmgenet_hfb_reg_writel(priv, 0x0, HFB_CTRL);
+ bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS);
+ bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS + 4);
+
+ for (i = DMA_INDEX2RING_0; i <= DMA_INDEX2RING_7; i++)
+ bcmgenet_rdma_writel(priv, 0x0, i);
+
+ for (i = 0; i < (priv->hw_params->hfb_filter_cnt / 4); i++)
+ bcmgenet_hfb_reg_writel(priv, 0x0,
+ HFB_FLT_LEN_V3PLUS + i * sizeof(u32));
+
+ for (i = 0; i < priv->hw_params->hfb_filter_cnt; i++)
+ bcmgenet_hfb_clear_filter(priv, i);
+}
+
+static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
+{
+ int i;
+
+ INIT_LIST_HEAD(&priv->rxnfc_list);
+ if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
+ return;
+
+ for (i = 0; i < MAX_NUM_OF_FS_RULES; i++) {
+ INIT_LIST_HEAD(&priv->rxnfc_rules[i].list);
+ priv->rxnfc_rules[i].state = BCMGENET_RXNFC_STATE_UNUSED;
+ }
+
+ bcmgenet_hfb_clear(priv);
+}
+
+static int bcmgenet_begin(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ /* Turn on the clock */
+ return clk_prepare_enable(priv->clk);
+}
+
+static void bcmgenet_complete(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ /* Turn off the clock */
+ clk_disable_unprepare(priv->clk);
+}
+
+static int bcmgenet_get_link_ksettings(struct net_device *dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!dev->phydev)
+ return -ENODEV;
+
+ phy_ethtool_ksettings_get(dev->phydev, cmd);
+
+ return 0;
+}
+
+static int bcmgenet_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!dev->phydev)
+ return -ENODEV;
+
+ return phy_ethtool_ksettings_set(dev->phydev, cmd);
+}
+
+static int bcmgenet_set_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ u32 reg;
+ int ret;
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ return ret;
+
+ /* Make sure we reflect the value of CRC_CMD_FWD */
+ reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+ priv->crc_fwd_en = !!(reg & CMD_CRC_FWD);
+
+ clk_disable_unprepare(priv->clk);
+
+ return ret;
+}
+
+static u32 bcmgenet_get_msglevel(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ return priv->msg_enable;
+}
+
+static void bcmgenet_set_msglevel(struct net_device *dev, u32 level)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ priv->msg_enable = level;
+}
+
+static int bcmgenet_get_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *ec,
+ struct kernel_ethtool_coalesce *kernel_coal,
+ struct netlink_ext_ack *extack)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rx_ring *ring;
+ unsigned int i;
+
+ ec->tx_max_coalesced_frames =
+ bcmgenet_tdma_ring_readl(priv, DESC_INDEX,
+ DMA_MBUF_DONE_THRESH);
+ ec->rx_max_coalesced_frames =
+ bcmgenet_rdma_ring_readl(priv, DESC_INDEX,
+ DMA_MBUF_DONE_THRESH);
+ ec->rx_coalesce_usecs =
+ bcmgenet_rdma_readl(priv, DMA_RING16_TIMEOUT) * 8192 / 1000;
+
+ for (i = 0; i < priv->hw_params->rx_queues; i++) {
+ ring = &priv->rx_rings[i];
+ ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
+ }
+ ring = &priv->rx_rings[DESC_INDEX];
+ ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
+
+ return 0;
+}
+
+static void bcmgenet_set_rx_coalesce(struct bcmgenet_rx_ring *ring,
+ u32 usecs, u32 pkts)
+{
+ struct bcmgenet_priv *priv = ring->priv;
+ unsigned int i = ring->index;
+ u32 reg;
+
+ bcmgenet_rdma_ring_writel(priv, i, pkts, DMA_MBUF_DONE_THRESH);
+
+ reg = bcmgenet_rdma_readl(priv, DMA_RING0_TIMEOUT + i);
+ reg &= ~DMA_TIMEOUT_MASK;
+ reg |= DIV_ROUND_UP(usecs * 1000, 8192);
+ bcmgenet_rdma_writel(priv, reg, DMA_RING0_TIMEOUT + i);
+}
+
+static void bcmgenet_set_ring_rx_coalesce(struct bcmgenet_rx_ring *ring,
+ struct ethtool_coalesce *ec)
+{
+ struct dim_cq_moder moder;
+ u32 usecs, pkts;
+
+ ring->rx_coalesce_usecs = ec->rx_coalesce_usecs;
+ ring->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
+ usecs = ring->rx_coalesce_usecs;
+ pkts = ring->rx_max_coalesced_frames;
+
+ if (ec->use_adaptive_rx_coalesce && !ring->dim.use_dim) {
+ moder = net_dim_get_def_rx_moderation(ring->dim.dim.mode);
+ usecs = moder.usec;
+ pkts = moder.pkts;
+ }
+
+ ring->dim.use_dim = ec->use_adaptive_rx_coalesce;
+ bcmgenet_set_rx_coalesce(ring, usecs, pkts);
+}
+
+static int bcmgenet_set_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *ec,
+ struct kernel_ethtool_coalesce *kernel_coal,
+ struct netlink_ext_ack *extack)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ unsigned int i;
+
+ /* Base system clock is 125Mhz, DMA timeout is this reference clock
+ * divided by 1024, which yields roughly 8.192us, our maximum value
+ * has to fit in the DMA_TIMEOUT_MASK (16 bits)
+ */
+ if (ec->tx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
+ ec->tx_max_coalesced_frames == 0 ||
+ ec->rx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
+ ec->rx_coalesce_usecs > (DMA_TIMEOUT_MASK * 8) + 1)
+ return -EINVAL;
+
+ if (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)
+ return -EINVAL;
+
+ /* GENET TDMA hardware does not support a configurable timeout, but will
+ * always generate an interrupt either after MBDONE packets have been
+ * transmitted, or when the ring is empty.
+ */
+
+ /* Program all TX queues with the same values, as there is no
+ * ethtool knob to do coalescing on a per-queue basis
+ */
+ for (i = 0; i < priv->hw_params->tx_queues; i++)
+ bcmgenet_tdma_ring_writel(priv, i,
+ ec->tx_max_coalesced_frames,
+ DMA_MBUF_DONE_THRESH);
+ bcmgenet_tdma_ring_writel(priv, DESC_INDEX,
+ ec->tx_max_coalesced_frames,
+ DMA_MBUF_DONE_THRESH);
+
+ for (i = 0; i < priv->hw_params->rx_queues; i++)
+ bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[i], ec);
+ bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[DESC_INDEX], ec);
+
+ return 0;
+}
+
+static void bcmgenet_get_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *epause)
+{
+ struct bcmgenet_priv *priv;
+ u32 umac_cmd;
+
+ priv = netdev_priv(dev);
+
+ epause->autoneg = priv->autoneg_pause;
+
+ if (netif_carrier_ok(dev)) {
+ /* report active state when link is up */
+ umac_cmd = bcmgenet_umac_readl(priv, UMAC_CMD);
+ epause->tx_pause = !(umac_cmd & CMD_TX_PAUSE_IGNORE);
+ epause->rx_pause = !(umac_cmd & CMD_RX_PAUSE_IGNORE);
+ } else {
+ /* otherwise report stored settings */
+ epause->tx_pause = priv->tx_pause;
+ epause->rx_pause = priv->rx_pause;
+ }
+}
+
+static int bcmgenet_set_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *epause)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ if (!dev->phydev)
+ return -ENODEV;
+
+ if (!phy_validate_pause(dev->phydev, epause))
+ return -EINVAL;
+
+ priv->autoneg_pause = !!epause->autoneg;
+ priv->tx_pause = !!epause->tx_pause;
+ priv->rx_pause = !!epause->rx_pause;
+
+ bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
+
+ return 0;
+}
+
+/* standard ethtool support functions. */
+enum bcmgenet_stat_type {
+ BCMGENET_STAT_NETDEV = -1,
+ BCMGENET_STAT_MIB_RX,
+ BCMGENET_STAT_MIB_TX,
+ BCMGENET_STAT_RUNT,
+ BCMGENET_STAT_MISC,
+ BCMGENET_STAT_SOFT,
+};
+
+struct bcmgenet_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ int stat_sizeof;
+ int stat_offset;
+ enum bcmgenet_stat_type type;
+ /* reg offset from UMAC base for misc counters */
+ u16 reg_offset;
+};
+
+#define STAT_NETDEV(m) { \
+ .stat_string = __stringify(m), \
+ .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \
+ .stat_offset = offsetof(struct net_device_stats, m), \
+ .type = BCMGENET_STAT_NETDEV, \
+}
+
+#define STAT_GENET_MIB(str, m, _type) { \
+ .stat_string = str, \
+ .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
+ .stat_offset = offsetof(struct bcmgenet_priv, m), \
+ .type = _type, \
+}
+
+#define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX)
+#define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX)
+#define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT)
+#define STAT_GENET_SOFT_MIB(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_SOFT)
+
+#define STAT_GENET_MISC(str, m, offset) { \
+ .stat_string = str, \
+ .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
+ .stat_offset = offsetof(struct bcmgenet_priv, m), \
+ .type = BCMGENET_STAT_MISC, \
+ .reg_offset = offset, \
+}
+
+#define STAT_GENET_Q(num) \
+ STAT_GENET_SOFT_MIB("txq" __stringify(num) "_packets", \
+ tx_rings[num].packets), \
+ STAT_GENET_SOFT_MIB("txq" __stringify(num) "_bytes", \
+ tx_rings[num].bytes), \
+ STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_bytes", \
+ rx_rings[num].bytes), \
+ STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_packets", \
+ rx_rings[num].packets), \
+ STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_errors", \
+ rx_rings[num].errors), \
+ STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_dropped", \
+ rx_rings[num].dropped)
+
+/* There is a 0xC gap between the end of RX and beginning of TX stats and then
+ * between the end of TX stats and the beginning of the RX RUNT
+ */
+#define BCMGENET_STAT_OFFSET 0xc
+
+/* Hardware counters must be kept in sync because the order/offset
+ * is important here (order in structure declaration = order in hardware)
+ */
+static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
+ /* general stats */
+ STAT_NETDEV(rx_packets),
+ STAT_NETDEV(tx_packets),
+ STAT_NETDEV(rx_bytes),
+ STAT_NETDEV(tx_bytes),
+ STAT_NETDEV(rx_errors),
+ STAT_NETDEV(tx_errors),
+ STAT_NETDEV(rx_dropped),
+ STAT_NETDEV(tx_dropped),
+ STAT_NETDEV(multicast),
+ /* UniMAC RSV counters */
+ STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
+ STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
+ STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
+ STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
+ STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
+ STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
+ STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
+ STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
+ STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
+ STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
+ STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt),
+ STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes),
+ STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca),
+ STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca),
+ STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs),
+ STAT_GENET_MIB_RX("rx_control", mib.rx.cf),
+ STAT_GENET_MIB_RX("rx_pause", mib.rx.pf),
+ STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo),
+ STAT_GENET_MIB_RX("rx_align", mib.rx.aln),
+ STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr),
+ STAT_GENET_MIB_RX("rx_code", mib.rx.cde),
+ STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr),
+ STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr),
+ STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr),
+ STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue),
+ STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok),
+ STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc),
+ STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp),
+ STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc),
+ /* UniMAC TSV counters */
+ STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
+ STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
+ STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
+ STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
+ STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
+ STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
+ STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
+ STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
+ STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
+ STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
+ STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts),
+ STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca),
+ STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca),
+ STAT_GENET_MIB_TX("tx_pause", mib.tx.pf),
+ STAT_GENET_MIB_TX("tx_control", mib.tx.cf),
+ STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs),
+ STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr),
+ STAT_GENET_MIB_TX("tx_defer", mib.tx.drf),
+ STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf),
+ STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl),
+ STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl),
+ STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl),
+ STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl),
+ STAT_GENET_MIB_TX("tx_frags", mib.tx.frg),
+ STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl),
+ STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr),
+ STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes),
+ STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok),
+ STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc),
+ /* UniMAC RUNT counters */
+ STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
+ STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
+ STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
+ STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
+ /* Misc UniMAC counters */
+ STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
+ UMAC_RBUF_OVFL_CNT_V1),
+ STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt,
+ UMAC_RBUF_ERR_CNT_V1),
+ STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
+ STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
+ STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
+ STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
+ STAT_GENET_SOFT_MIB("tx_realloc_tsb", mib.tx_realloc_tsb),
+ STAT_GENET_SOFT_MIB("tx_realloc_tsb_failed",
+ mib.tx_realloc_tsb_failed),
+ /* Per TX queues */
+ STAT_GENET_Q(0),
+ STAT_GENET_Q(1),
+ STAT_GENET_Q(2),
+ STAT_GENET_Q(3),
+ STAT_GENET_Q(16),
+};
+
+#define BCMGENET_STATS_LEN ARRAY_SIZE(bcmgenet_gstrings_stats)
+
+static void bcmgenet_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strscpy(info->driver, "bcmgenet", sizeof(info->driver));
+}
+
+static int bcmgenet_get_sset_count(struct net_device *dev, int string_set)
+{
+ switch (string_set) {
+ case ETH_SS_STATS:
+ return BCMGENET_STATS_LEN;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
+ u8 *data)
+{
+ int i;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ for (i = 0; i < BCMGENET_STATS_LEN; i++) {
+ memcpy(data + i * ETH_GSTRING_LEN,
+ bcmgenet_gstrings_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ }
+ break;
+ }
+}
+
+static u32 bcmgenet_update_stat_misc(struct bcmgenet_priv *priv, u16 offset)
+{
+ u16 new_offset;
+ u32 val;
+
+ switch (offset) {
+ case UMAC_RBUF_OVFL_CNT_V1:
+ if (GENET_IS_V2(priv))
+ new_offset = RBUF_OVFL_CNT_V2;
+ else
+ new_offset = RBUF_OVFL_CNT_V3PLUS;
+
+ val = bcmgenet_rbuf_readl(priv, new_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_rbuf_writel(priv, 0, new_offset);
+ break;
+ case UMAC_RBUF_ERR_CNT_V1:
+ if (GENET_IS_V2(priv))
+ new_offset = RBUF_ERR_CNT_V2;
+ else
+ new_offset = RBUF_ERR_CNT_V3PLUS;
+
+ val = bcmgenet_rbuf_readl(priv, new_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_rbuf_writel(priv, 0, new_offset);
+ break;
+ default:
+ val = bcmgenet_umac_readl(priv, offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_umac_writel(priv, 0, offset);
+ break;
+ }
+
+ return val;
+}
+
+static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
+{
+ int i, j = 0;
+
+ for (i = 0; i < BCMGENET_STATS_LEN; i++) {
+ const struct bcmgenet_stats *s;
+ u8 offset = 0;
+ u32 val = 0;
+ char *p;
+
+ s = &bcmgenet_gstrings_stats[i];
+ switch (s->type) {
+ case BCMGENET_STAT_NETDEV:
+ case BCMGENET_STAT_SOFT:
+ continue;
+ case BCMGENET_STAT_RUNT:
+ offset += BCMGENET_STAT_OFFSET;
+ fallthrough;
+ case BCMGENET_STAT_MIB_TX:
+ offset += BCMGENET_STAT_OFFSET;
+ fallthrough;
+ case BCMGENET_STAT_MIB_RX:
+ val = bcmgenet_umac_readl(priv,
+ UMAC_MIB_START + j + offset);
+ offset = 0; /* Reset Offset */
+ break;
+ case BCMGENET_STAT_MISC:
+ if (GENET_IS_V1(priv)) {
+ val = bcmgenet_umac_readl(priv, s->reg_offset);
+ /* clear if overflowed */
+ if (val == ~0)
+ bcmgenet_umac_writel(priv, 0,
+ s->reg_offset);
+ } else {
+ val = bcmgenet_update_stat_misc(priv,
+ s->reg_offset);
+ }
+ break;
+ }
+
+ j += s->stat_sizeof;
+ p = (char *)priv + s->stat_offset;
+ *(u32 *)p = val;
+ }
+}
+
+static void bcmgenet_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats,
+ u64 *data)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int i;
+
+ if (netif_running(dev))
+ bcmgenet_update_mib_counters(priv);
+
+ dev->netdev_ops->ndo_get_stats(dev);
+
+ for (i = 0; i < BCMGENET_STATS_LEN; i++) {
+ const struct bcmgenet_stats *s;
+ char *p;
+
+ s = &bcmgenet_gstrings_stats[i];
+ if (s->type == BCMGENET_STAT_NETDEV)
+ p = (char *)&dev->stats;
+ else
+ p = (char *)priv;
+ p += s->stat_offset;
+ if (sizeof(unsigned long) != sizeof(u32) &&
+ s->stat_sizeof == sizeof(unsigned long))
+ data[i] = *(unsigned long *)p;
+ else
+ data[i] = *(u32 *)p;
+ }
+}
+
+void bcmgenet_eee_enable_set(struct net_device *dev, bool enable,
+ bool tx_lpi_enabled)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
+ u32 reg;
+
+ if (enable && !priv->clk_eee_enabled) {
+ clk_prepare_enable(priv->clk_eee);
+ priv->clk_eee_enabled = true;
+ }
+
+ reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
+ if (enable)
+ reg |= EEE_EN;
+ else
+ reg &= ~EEE_EN;
+ bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
+
+ /* Enable EEE and switch to a 27Mhz clock automatically */
+ reg = bcmgenet_readl(priv->base + off);
+ if (tx_lpi_enabled)
+ reg |= TBUF_EEE_EN | TBUF_PM_EN;
+ else
+ reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
+ bcmgenet_writel(reg, priv->base + off);
+
+ /* Do the same for thing for RBUF */
+ reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
+ if (enable)
+ reg |= RBUF_EEE_EN | RBUF_PM_EN;
+ else
+ reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
+ bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
+
+ if (!enable && priv->clk_eee_enabled) {
+ clk_disable_unprepare(priv->clk_eee);
+ priv->clk_eee_enabled = false;
+ }
+
+ priv->eee.eee_enabled = enable;
+ priv->eee.eee_active = enable;
+ priv->eee.tx_lpi_enabled = tx_lpi_enabled;
+}
+
+static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct ethtool_eee *p = &priv->eee;
+
+ if (GENET_IS_V1(priv))
+ return -EOPNOTSUPP;
+
+ if (!dev->phydev)
+ return -ENODEV;
+
+ e->eee_enabled = p->eee_enabled;
+ e->eee_active = p->eee_active;
+ e->tx_lpi_enabled = p->tx_lpi_enabled;
+ e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
+
+ return phy_ethtool_get_eee(dev->phydev, e);
+}
+
+static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct ethtool_eee *p = &priv->eee;
+
+ if (GENET_IS_V1(priv))
+ return -EOPNOTSUPP;
+
+ if (!dev->phydev)
+ return -ENODEV;
+
+ p->eee_enabled = e->eee_enabled;
+
+ if (!p->eee_enabled) {
+ bcmgenet_eee_enable_set(dev, false, false);
+ } else {
+ p->eee_active = phy_init_eee(dev->phydev, false) >= 0;
+ bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
+ bcmgenet_eee_enable_set(dev, p->eee_active, e->tx_lpi_enabled);
+ }
+
+ return phy_ethtool_set_eee(dev->phydev, e);
+}
+
+static int bcmgenet_validate_flow(struct net_device *dev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct ethtool_usrip4_spec *l4_mask;
+ struct ethhdr *eth_mask;
+
+ if (cmd->fs.location >= MAX_NUM_OF_FS_RULES) {
+ netdev_err(dev, "rxnfc: Invalid location (%d)\n",
+ cmd->fs.location);
+ return -EINVAL;
+ }
+
+ switch (cmd->fs.flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
+ case IP_USER_FLOW:
+ l4_mask = &cmd->fs.m_u.usr_ip4_spec;
+ /* don't allow mask which isn't valid */
+ if (VALIDATE_MASK(l4_mask->ip4src) ||
+ VALIDATE_MASK(l4_mask->ip4dst) ||
+ VALIDATE_MASK(l4_mask->l4_4_bytes) ||
+ VALIDATE_MASK(l4_mask->proto) ||
+ VALIDATE_MASK(l4_mask->ip_ver) ||
+ VALIDATE_MASK(l4_mask->tos)) {
+ netdev_err(dev, "rxnfc: Unsupported mask\n");
+ return -EINVAL;
+ }
+ break;
+ case ETHER_FLOW:
+ eth_mask = &cmd->fs.m_u.ether_spec;
+ /* don't allow mask which isn't valid */
+ if (VALIDATE_MASK(eth_mask->h_dest) ||
+ VALIDATE_MASK(eth_mask->h_source) ||
+ VALIDATE_MASK(eth_mask->h_proto)) {
+ netdev_err(dev, "rxnfc: Unsupported mask\n");
+ return -EINVAL;
+ }
+ break;
+ default:
+ netdev_err(dev, "rxnfc: Unsupported flow type (0x%x)\n",
+ cmd->fs.flow_type);
+ return -EINVAL;
+ }
+
+ if ((cmd->fs.flow_type & FLOW_EXT)) {
+ /* don't allow mask which isn't valid */
+ if (VALIDATE_MASK(cmd->fs.m_ext.vlan_etype) ||
+ VALIDATE_MASK(cmd->fs.m_ext.vlan_tci)) {
+ netdev_err(dev, "rxnfc: Unsupported mask\n");
+ return -EINVAL;
+ }
+ if (cmd->fs.m_ext.data[0] || cmd->fs.m_ext.data[1]) {
+ netdev_err(dev, "rxnfc: user-def not supported\n");
+ return -EINVAL;
+ }
+ }
+
+ if ((cmd->fs.flow_type & FLOW_MAC_EXT)) {
+ /* don't allow mask which isn't valid */
+ if (VALIDATE_MASK(cmd->fs.m_ext.h_dest)) {
+ netdev_err(dev, "rxnfc: Unsupported mask\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int bcmgenet_insert_flow(struct net_device *dev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rxnfc_rule *loc_rule;
+ int err;
+
+ if (priv->hw_params->hfb_filter_size < 128) {
+ netdev_err(dev, "rxnfc: Not supported by this device\n");
+ return -EINVAL;
+ }
+
+ if (cmd->fs.ring_cookie > priv->hw_params->rx_queues &&
+ cmd->fs.ring_cookie != RX_CLS_FLOW_WAKE) {
+ netdev_err(dev, "rxnfc: Unsupported action (%llu)\n",
+ cmd->fs.ring_cookie);
+ return -EINVAL;
+ }
+
+ err = bcmgenet_validate_flow(dev, cmd);
+ if (err)
+ return err;
+
+ loc_rule = &priv->rxnfc_rules[cmd->fs.location];
+ if (loc_rule->state == BCMGENET_RXNFC_STATE_ENABLED)
+ bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
+ if (loc_rule->state != BCMGENET_RXNFC_STATE_UNUSED) {
+ list_del(&loc_rule->list);
+ bcmgenet_hfb_clear_filter(priv, cmd->fs.location);
+ }
+ loc_rule->state = BCMGENET_RXNFC_STATE_UNUSED;
+ memcpy(&loc_rule->fs, &cmd->fs,
+ sizeof(struct ethtool_rx_flow_spec));
+
+ bcmgenet_hfb_create_rxnfc_filter(priv, loc_rule);
+
+ list_add_tail(&loc_rule->list, &priv->rxnfc_list);
+
+ return 0;
+}
+
+static int bcmgenet_delete_flow(struct net_device *dev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rxnfc_rule *rule;
+ int err = 0;
+
+ if (cmd->fs.location >= MAX_NUM_OF_FS_RULES)
+ return -EINVAL;
+
+ rule = &priv->rxnfc_rules[cmd->fs.location];
+ if (rule->state == BCMGENET_RXNFC_STATE_UNUSED) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (rule->state == BCMGENET_RXNFC_STATE_ENABLED)
+ bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
+ if (rule->state != BCMGENET_RXNFC_STATE_UNUSED) {
+ list_del(&rule->list);
+ bcmgenet_hfb_clear_filter(priv, cmd->fs.location);
+ }
+ rule->state = BCMGENET_RXNFC_STATE_UNUSED;
+ memset(&rule->fs, 0, sizeof(struct ethtool_rx_flow_spec));
+
+out:
+ return err;
+}
+
+static int bcmgenet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int err = 0;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_SRXCLSRLINS:
+ err = bcmgenet_insert_flow(dev, cmd);
+ break;
+ case ETHTOOL_SRXCLSRLDEL:
+ err = bcmgenet_delete_flow(dev, cmd);
+ break;
+ default:
+ netdev_warn(priv->dev, "Unsupported ethtool command. (%d)\n",
+ cmd->cmd);
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+static int bcmgenet_get_flow(struct net_device *dev, struct ethtool_rxnfc *cmd,
+ int loc)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rxnfc_rule *rule;
+ int err = 0;
+
+ if (loc < 0 || loc >= MAX_NUM_OF_FS_RULES)
+ return -EINVAL;
+
+ rule = &priv->rxnfc_rules[loc];
+ if (rule->state == BCMGENET_RXNFC_STATE_UNUSED)
+ err = -ENOENT;
+ else
+ memcpy(&cmd->fs, &rule->fs,
+ sizeof(struct ethtool_rx_flow_spec));
+
+ return err;
+}
+
+static int bcmgenet_get_num_flows(struct bcmgenet_priv *priv)
+{
+ struct list_head *pos;
+ int res = 0;
+
+ list_for_each(pos, &priv->rxnfc_list)
+ res++;
+
+ return res;
+}
+
+static int bcmgenet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
+ u32 *rule_locs)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rxnfc_rule *rule;
+ int err = 0;
+ int i = 0;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_GRXRINGS:
+ cmd->data = priv->hw_params->rx_queues ?: 1;
+ break;
+ case ETHTOOL_GRXCLSRLCNT:
+ cmd->rule_cnt = bcmgenet_get_num_flows(priv);
+ cmd->data = MAX_NUM_OF_FS_RULES;
+ break;
+ case ETHTOOL_GRXCLSRULE:
+ err = bcmgenet_get_flow(dev, cmd, cmd->fs.location);
+ break;
+ case ETHTOOL_GRXCLSRLALL:
+ list_for_each_entry(rule, &priv->rxnfc_list, list)
+ if (i < cmd->rule_cnt)
+ rule_locs[i++] = rule->fs.location;
+ cmd->rule_cnt = i;
+ cmd->data = MAX_NUM_OF_FS_RULES;
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+/* standard ethtool support functions. */
+static const struct ethtool_ops bcmgenet_ethtool_ops = {
+ .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
+ ETHTOOL_COALESCE_MAX_FRAMES |
+ ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
+ .begin = bcmgenet_begin,
+ .complete = bcmgenet_complete,
+ .get_strings = bcmgenet_get_strings,
+ .get_sset_count = bcmgenet_get_sset_count,
+ .get_ethtool_stats = bcmgenet_get_ethtool_stats,
+ .get_drvinfo = bcmgenet_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_msglevel = bcmgenet_get_msglevel,
+ .set_msglevel = bcmgenet_set_msglevel,
+ .get_wol = bcmgenet_get_wol,
+ .set_wol = bcmgenet_set_wol,
+ .get_eee = bcmgenet_get_eee,
+ .set_eee = bcmgenet_set_eee,
+ .nway_reset = phy_ethtool_nway_reset,
+ .get_coalesce = bcmgenet_get_coalesce,
+ .set_coalesce = bcmgenet_set_coalesce,
+ .get_link_ksettings = bcmgenet_get_link_ksettings,
+ .set_link_ksettings = bcmgenet_set_link_ksettings,
+ .get_ts_info = ethtool_op_get_ts_info,
+ .get_rxnfc = bcmgenet_get_rxnfc,
+ .set_rxnfc = bcmgenet_set_rxnfc,
+ .get_pauseparam = bcmgenet_get_pauseparam,
+ .set_pauseparam = bcmgenet_set_pauseparam,
+};
+
+/* Power down the unimac, based on mode. */
+static int bcmgenet_power_down(struct bcmgenet_priv *priv,
+ enum bcmgenet_power_mode mode)
+{
+ int ret = 0;
+ u32 reg;
+
+ switch (mode) {
+ case GENET_POWER_CABLE_SENSE:
+ phy_detach(priv->dev->phydev);
+ break;
+
+ case GENET_POWER_WOL_MAGIC:
+ ret = bcmgenet_wol_power_down_cfg(priv, mode);
+ break;
+
+ case GENET_POWER_PASSIVE:
+ /* Power down LED */
+ if (priv->hw_params->flags & GENET_HAS_EXT) {
+ reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
+ if (GENET_IS_V5(priv) && !priv->ephy_16nm)
+ reg |= EXT_PWR_DOWN_PHY_EN |
+ EXT_PWR_DOWN_PHY_RD |
+ EXT_PWR_DOWN_PHY_SD |
+ EXT_PWR_DOWN_PHY_RX |
+ EXT_PWR_DOWN_PHY_TX |
+ EXT_IDDQ_GLBL_PWR;
+ else
+ reg |= EXT_PWR_DOWN_PHY;
+
+ reg |= (EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS);
+ bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
+
+ bcmgenet_phy_power_set(priv->dev, false);
+ }
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void bcmgenet_power_up(struct bcmgenet_priv *priv,
+ enum bcmgenet_power_mode mode)
+{
+ u32 reg;
+
+ if (!(priv->hw_params->flags & GENET_HAS_EXT))
+ return;
+
+ reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
+
+ switch (mode) {
+ case GENET_POWER_PASSIVE:
+ reg &= ~(EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS |
+ EXT_ENERGY_DET_MASK);
+ if (GENET_IS_V5(priv) && !priv->ephy_16nm) {
+ reg &= ~(EXT_PWR_DOWN_PHY_EN |
+ EXT_PWR_DOWN_PHY_RD |
+ EXT_PWR_DOWN_PHY_SD |
+ EXT_PWR_DOWN_PHY_RX |
+ EXT_PWR_DOWN_PHY_TX |
+ EXT_IDDQ_GLBL_PWR);
+ reg |= EXT_PHY_RESET;
+ bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
+ mdelay(1);
+
+ reg &= ~EXT_PHY_RESET;
+ } else {
+ reg &= ~EXT_PWR_DOWN_PHY;
+ reg |= EXT_PWR_DN_EN_LD;
+ }
+ bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
+ bcmgenet_phy_power_set(priv->dev, true);
+ break;
+
+ case GENET_POWER_CABLE_SENSE:
+ /* enable APD */
+ if (!GENET_IS_V5(priv)) {
+ reg |= EXT_PWR_DN_EN_LD;
+ bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
+ }
+ break;
+ case GENET_POWER_WOL_MAGIC:
+ bcmgenet_wol_power_up_cfg(priv, mode);
+ return;
+ default:
+ break;
+ }
+}
+
+static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv,
+ struct bcmgenet_tx_ring *ring)
+{
+ struct enet_cb *tx_cb_ptr;
+
+ tx_cb_ptr = ring->cbs;
+ tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
+
+ /* Advancing local write pointer */
+ if (ring->write_ptr == ring->end_ptr)
+ ring->write_ptr = ring->cb_ptr;
+ else
+ ring->write_ptr++;
+
+ return tx_cb_ptr;
+}
+
+static struct enet_cb *bcmgenet_put_txcb(struct bcmgenet_priv *priv,
+ struct bcmgenet_tx_ring *ring)
+{
+ struct enet_cb *tx_cb_ptr;
+
+ tx_cb_ptr = ring->cbs;
+ tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
+
+ /* Rewinding local write pointer */
+ if (ring->write_ptr == ring->cb_ptr)
+ ring->write_ptr = ring->end_ptr;
+ else
+ ring->write_ptr--;
+
+ return tx_cb_ptr;
+}
+
+static inline void bcmgenet_rx_ring16_int_disable(struct bcmgenet_rx_ring *ring)
+{
+ bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
+ INTRL2_CPU_MASK_SET);
+}
+
+static inline void bcmgenet_rx_ring16_int_enable(struct bcmgenet_rx_ring *ring)
+{
+ bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
+ INTRL2_CPU_MASK_CLEAR);
+}
+
+static inline void bcmgenet_rx_ring_int_disable(struct bcmgenet_rx_ring *ring)
+{
+ bcmgenet_intrl2_1_writel(ring->priv,
+ 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
+ INTRL2_CPU_MASK_SET);
+}
+
+static inline void bcmgenet_rx_ring_int_enable(struct bcmgenet_rx_ring *ring)
+{
+ bcmgenet_intrl2_1_writel(ring->priv,
+ 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
+ INTRL2_CPU_MASK_CLEAR);
+}
+
+static inline void bcmgenet_tx_ring16_int_disable(struct bcmgenet_tx_ring *ring)
+{
+ bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
+ INTRL2_CPU_MASK_SET);
+}
+
+static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_tx_ring *ring)
+{
+ bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
+ INTRL2_CPU_MASK_CLEAR);
+}
+
+static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_tx_ring *ring)
+{
+ bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
+ INTRL2_CPU_MASK_CLEAR);
+}
+
+static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_tx_ring *ring)
+{
+ bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
+ INTRL2_CPU_MASK_SET);
+}
+
+/* Simple helper to free a transmit control block's resources
+ * Returns an skb when the last transmit control block associated with the
+ * skb is freed. The skb should be freed by the caller if necessary.
+ */
+static struct sk_buff *bcmgenet_free_tx_cb(struct device *dev,
+ struct enet_cb *cb)
+{
+ struct sk_buff *skb;
+
+ skb = cb->skb;
+
+ if (skb) {
+ cb->skb = NULL;
+ if (cb == GENET_CB(skb)->first_cb)
+ dma_unmap_single(dev, dma_unmap_addr(cb, dma_addr),
+ dma_unmap_len(cb, dma_len),
+ DMA_TO_DEVICE);
+ else
+ dma_unmap_page(dev, dma_unmap_addr(cb, dma_addr),
+ dma_unmap_len(cb, dma_len),
+ DMA_TO_DEVICE);
+ dma_unmap_addr_set(cb, dma_addr, 0);
+
+ if (cb == GENET_CB(skb)->last_cb)
+ return skb;
+
+ } else if (dma_unmap_addr(cb, dma_addr)) {
+ dma_unmap_page(dev,
+ dma_unmap_addr(cb, dma_addr),
+ dma_unmap_len(cb, dma_len),
+ DMA_TO_DEVICE);
+ dma_unmap_addr_set(cb, dma_addr, 0);
+ }
+
+ return NULL;
+}
+
+/* Simple helper to free a receive control block's resources */
+static struct sk_buff *bcmgenet_free_rx_cb(struct device *dev,
+ struct enet_cb *cb)
+{
+ struct sk_buff *skb;
+
+ skb = cb->skb;
+ cb->skb = NULL;
+
+ if (dma_unmap_addr(cb, dma_addr)) {
+ dma_unmap_single(dev, dma_unmap_addr(cb, dma_addr),
+ dma_unmap_len(cb, dma_len), DMA_FROM_DEVICE);
+ dma_unmap_addr_set(cb, dma_addr, 0);
+ }
+
+ return skb;
+}
+
+/* Unlocked version of the reclaim routine */
+static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
+ struct bcmgenet_tx_ring *ring)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ unsigned int txbds_processed = 0;
+ unsigned int bytes_compl = 0;
+ unsigned int pkts_compl = 0;
+ unsigned int txbds_ready;
+ unsigned int c_index;
+ struct sk_buff *skb;
+
+ /* Clear status before servicing to reduce spurious interrupts */
+ if (ring->index == DESC_INDEX)
+ bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_TXDMA_DONE,
+ INTRL2_CPU_CLEAR);
+ else
+ bcmgenet_intrl2_1_writel(priv, (1 << ring->index),
+ INTRL2_CPU_CLEAR);
+
+ /* Compute how many buffers are transmitted since last xmit call */
+ c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX)
+ & DMA_C_INDEX_MASK;
+ txbds_ready = (c_index - ring->c_index) & DMA_C_INDEX_MASK;
+
+ netif_dbg(priv, tx_done, dev,
+ "%s ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
+ __func__, ring->index, ring->c_index, c_index, txbds_ready);
+
+ /* Reclaim transmitted buffers */
+ while (txbds_processed < txbds_ready) {
+ skb = bcmgenet_free_tx_cb(&priv->pdev->dev,
+ &priv->tx_cbs[ring->clean_ptr]);
+ if (skb) {
+ pkts_compl++;
+ bytes_compl += GENET_CB(skb)->bytes_sent;
+ dev_consume_skb_any(skb);
+ }
+
+ txbds_processed++;
+ if (likely(ring->clean_ptr < ring->end_ptr))
+ ring->clean_ptr++;
+ else
+ ring->clean_ptr = ring->cb_ptr;
+ }
+
+ ring->free_bds += txbds_processed;
+ ring->c_index = c_index;
+
+ ring->packets += pkts_compl;
+ ring->bytes += bytes_compl;
+
+ netdev_tx_completed_queue(netdev_get_tx_queue(dev, ring->queue),
+ pkts_compl, bytes_compl);
+
+ return txbds_processed;
+}
+
+static unsigned int bcmgenet_tx_reclaim(struct net_device *dev,
+ struct bcmgenet_tx_ring *ring)
+{
+ unsigned int released;
+
+ spin_lock_bh(&ring->lock);
+ released = __bcmgenet_tx_reclaim(dev, ring);
+ spin_unlock_bh(&ring->lock);
+
+ return released;
+}
+
+static int bcmgenet_tx_poll(struct napi_struct *napi, int budget)
+{
+ struct bcmgenet_tx_ring *ring =
+ container_of(napi, struct bcmgenet_tx_ring, napi);
+ unsigned int work_done = 0;
+ struct netdev_queue *txq;
+
+ spin_lock(&ring->lock);
+ work_done = __bcmgenet_tx_reclaim(ring->priv->dev, ring);
+ if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
+ txq = netdev_get_tx_queue(ring->priv->dev, ring->queue);
+ netif_tx_wake_queue(txq);
+ }
+ spin_unlock(&ring->lock);
+
+ if (work_done == 0) {
+ napi_complete(napi);
+ ring->int_enable(ring);
+
+ return 0;
+ }
+
+ return budget;
+}
+
+static void bcmgenet_tx_reclaim_all(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int i;
+
+ if (netif_is_multiqueue(dev)) {
+ for (i = 0; i < priv->hw_params->tx_queues; i++)
+ bcmgenet_tx_reclaim(dev, &priv->tx_rings[i]);
+ }
+
+ bcmgenet_tx_reclaim(dev, &priv->tx_rings[DESC_INDEX]);
+}
+
+/* Reallocate the SKB to put enough headroom in front of it and insert
+ * the transmit checksum offsets in the descriptors
+ */
+static struct sk_buff *bcmgenet_add_tsb(struct net_device *dev,
+ struct sk_buff *skb)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct status_64 *status = NULL;
+ struct sk_buff *new_skb;
+ u16 offset;
+ u8 ip_proto;
+ __be16 ip_ver;
+ u32 tx_csum_info;
+
+ if (unlikely(skb_headroom(skb) < sizeof(*status))) {
+ /* If 64 byte status block enabled, must make sure skb has
+ * enough headroom for us to insert 64B status block.
+ */
+ new_skb = skb_realloc_headroom(skb, sizeof(*status));
+ if (!new_skb) {
+ dev_kfree_skb_any(skb);
+ priv->mib.tx_realloc_tsb_failed++;
+ dev->stats.tx_dropped++;
+ return NULL;
+ }
+ dev_consume_skb_any(skb);
+ skb = new_skb;
+ priv->mib.tx_realloc_tsb++;
+ }
+
+ skb_push(skb, sizeof(*status));
+ status = (struct status_64 *)skb->data;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ ip_ver = skb->protocol;
+ switch (ip_ver) {
+ case htons(ETH_P_IP):
+ ip_proto = ip_hdr(skb)->protocol;
+ break;
+ case htons(ETH_P_IPV6):
+ ip_proto = ipv6_hdr(skb)->nexthdr;
+ break;
+ default:
+ /* don't use UDP flag */
+ ip_proto = 0;
+ break;
+ }
+
+ offset = skb_checksum_start_offset(skb) - sizeof(*status);
+ tx_csum_info = (offset << STATUS_TX_CSUM_START_SHIFT) |
+ (offset + skb->csum_offset) |
+ STATUS_TX_CSUM_LV;
+
+ /* Set the special UDP flag for UDP */
+ if (ip_proto == IPPROTO_UDP)
+ tx_csum_info |= STATUS_TX_CSUM_PROTO_UDP;
+
+ status->tx_csum_info = tx_csum_info;
+ }
+
+ return skb;
+}
+
+static void bcmgenet_hide_tsb(struct sk_buff *skb)
+{
+ __skb_pull(skb, sizeof(struct status_64));
+}
+
+static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct device *kdev = &priv->pdev->dev;
+ struct bcmgenet_tx_ring *ring = NULL;
+ struct enet_cb *tx_cb_ptr;
+ struct netdev_queue *txq;
+ int nr_frags, index;
+ dma_addr_t mapping;
+ unsigned int size;
+ skb_frag_t *frag;
+ u32 len_stat;
+ int ret;
+ int i;
+
+ index = skb_get_queue_mapping(skb);
+ /* Mapping strategy:
+ * queue_mapping = 0, unclassified, packet xmited through ring16
+ * queue_mapping = 1, goes to ring 0. (highest priority queue
+ * queue_mapping = 2, goes to ring 1.
+ * queue_mapping = 3, goes to ring 2.
+ * queue_mapping = 4, goes to ring 3.
+ */
+ if (index == 0)
+ index = DESC_INDEX;
+ else
+ index -= 1;
+
+ ring = &priv->tx_rings[index];
+ txq = netdev_get_tx_queue(dev, ring->queue);
+
+ nr_frags = skb_shinfo(skb)->nr_frags;
+
+ spin_lock(&ring->lock);
+ if (ring->free_bds <= (nr_frags + 1)) {
+ if (!netif_tx_queue_stopped(txq)) {
+ netif_tx_stop_queue(txq);
+ netdev_err(dev,
+ "%s: tx ring %d full when queue %d awake\n",
+ __func__, index, ring->queue);
+ }
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
+ /* Retain how many bytes will be sent on the wire, without TSB inserted
+ * by transmit checksum offload
+ */
+ GENET_CB(skb)->bytes_sent = skb->len;
+
+ /* add the Transmit Status Block */
+ skb = bcmgenet_add_tsb(dev, skb);
+ if (!skb) {
+ ret = NETDEV_TX_OK;
+ goto out;
+ }
+
+ for (i = 0; i <= nr_frags; i++) {
+ tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
+
+ BUG_ON(!tx_cb_ptr);
+
+ if (!i) {
+ /* Transmit single SKB or head of fragment list */
+ GENET_CB(skb)->first_cb = tx_cb_ptr;
+ size = skb_headlen(skb);
+ mapping = dma_map_single(kdev, skb->data, size,
+ DMA_TO_DEVICE);
+ } else {
+ /* xmit fragment */
+ frag = &skb_shinfo(skb)->frags[i - 1];
+ size = skb_frag_size(frag);
+ mapping = skb_frag_dma_map(kdev, frag, 0, size,
+ DMA_TO_DEVICE);
+ }
+
+ ret = dma_mapping_error(kdev, mapping);
+ if (ret) {
+ priv->mib.tx_dma_failed++;
+ netif_err(priv, tx_err, dev, "Tx DMA map failed\n");
+ ret = NETDEV_TX_OK;
+ goto out_unmap_frags;
+ }
+ dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
+ dma_unmap_len_set(tx_cb_ptr, dma_len, size);
+
+ tx_cb_ptr->skb = skb;
+
+ len_stat = (size << DMA_BUFLENGTH_SHIFT) |
+ (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT);
+
+ /* Note: if we ever change from DMA_TX_APPEND_CRC below we
+ * will need to restore software padding of "runt" packets
+ */
+ len_stat |= DMA_TX_APPEND_CRC;
+
+ if (!i) {
+ len_stat |= DMA_SOP;
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ len_stat |= DMA_TX_DO_CSUM;
+ }
+ if (i == nr_frags)
+ len_stat |= DMA_EOP;
+
+ dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, len_stat);
+ }
+
+ GENET_CB(skb)->last_cb = tx_cb_ptr;
+
+ bcmgenet_hide_tsb(skb);
+ skb_tx_timestamp(skb);
+
+ /* Decrement total BD count and advance our write pointer */
+ ring->free_bds -= nr_frags + 1;
+ ring->prod_index += nr_frags + 1;
+ ring->prod_index &= DMA_P_INDEX_MASK;
+
+ netdev_tx_sent_queue(txq, GENET_CB(skb)->bytes_sent);
+
+ if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
+ netif_tx_stop_queue(txq);
+
+ if (!netdev_xmit_more() || netif_xmit_stopped(txq))
+ /* Packets are ready, update producer index */
+ bcmgenet_tdma_ring_writel(priv, ring->index,
+ ring->prod_index, TDMA_PROD_INDEX);
+out:
+ spin_unlock(&ring->lock);
+
+ return ret;
+
+out_unmap_frags:
+ /* Back up for failed control block mapping */
+ bcmgenet_put_txcb(priv, ring);
+
+ /* Unmap successfully mapped control blocks */
+ while (i-- > 0) {
+ tx_cb_ptr = bcmgenet_put_txcb(priv, ring);
+ bcmgenet_free_tx_cb(kdev, tx_cb_ptr);
+ }
+
+ dev_kfree_skb(skb);
+ goto out;
+}
+
+static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
+ struct enet_cb *cb)
+{
+ struct device *kdev = &priv->pdev->dev;
+ struct sk_buff *skb;
+ struct sk_buff *rx_skb;
+ dma_addr_t mapping;
+
+ /* Allocate a new Rx skb */
+ skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT,
+ GFP_ATOMIC | __GFP_NOWARN);
+ if (!skb) {
+ priv->mib.alloc_rx_buff_failed++;
+ netif_err(priv, rx_err, priv->dev,
+ "%s: Rx skb allocation failed\n", __func__);
+ return NULL;
+ }
+
+ /* DMA-map the new Rx skb */
+ mapping = dma_map_single(kdev, skb->data, priv->rx_buf_len,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(kdev, mapping)) {
+ priv->mib.rx_dma_failed++;
+ dev_kfree_skb_any(skb);
+ netif_err(priv, rx_err, priv->dev,
+ "%s: Rx skb DMA mapping failed\n", __func__);
+ return NULL;
+ }
+
+ /* Grab the current Rx skb from the ring and DMA-unmap it */
+ rx_skb = bcmgenet_free_rx_cb(kdev, cb);
+
+ /* Put the new Rx skb on the ring */
+ cb->skb = skb;
+ dma_unmap_addr_set(cb, dma_addr, mapping);
+ dma_unmap_len_set(cb, dma_len, priv->rx_buf_len);
+ dmadesc_set_addr(priv, cb->bd_addr, mapping);
+
+ /* Return the current Rx skb to caller */
+ return rx_skb;
+}
+
+/* bcmgenet_desc_rx - descriptor based rx process.
+ * this could be called from bottom half, or from NAPI polling method.
+ */
+static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
+ unsigned int budget)
+{
+ struct bcmgenet_priv *priv = ring->priv;
+ struct net_device *dev = priv->dev;
+ struct enet_cb *cb;
+ struct sk_buff *skb;
+ u32 dma_length_status;
+ unsigned long dma_flag;
+ int len;
+ unsigned int rxpktprocessed = 0, rxpkttoprocess;
+ unsigned int bytes_processed = 0;
+ unsigned int p_index, mask;
+ unsigned int discards;
+
+ /* Clear status before servicing to reduce spurious interrupts */
+ if (ring->index == DESC_INDEX) {
+ bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_DONE,
+ INTRL2_CPU_CLEAR);
+ } else {
+ mask = 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index);
+ bcmgenet_intrl2_1_writel(priv,
+ mask,
+ INTRL2_CPU_CLEAR);
+ }
+
+ p_index = bcmgenet_rdma_ring_readl(priv, ring->index, RDMA_PROD_INDEX);
+
+ discards = (p_index >> DMA_P_INDEX_DISCARD_CNT_SHIFT) &
+ DMA_P_INDEX_DISCARD_CNT_MASK;
+ if (discards > ring->old_discards) {
+ discards = discards - ring->old_discards;
+ ring->errors += discards;
+ ring->old_discards += discards;
+
+ /* Clear HW register when we reach 75% of maximum 0xFFFF */
+ if (ring->old_discards >= 0xC000) {
+ ring->old_discards = 0;
+ bcmgenet_rdma_ring_writel(priv, ring->index, 0,
+ RDMA_PROD_INDEX);
+ }
+ }
+
+ p_index &= DMA_P_INDEX_MASK;
+ rxpkttoprocess = (p_index - ring->c_index) & DMA_C_INDEX_MASK;
+
+ netif_dbg(priv, rx_status, dev,
+ "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
+
+ while ((rxpktprocessed < rxpkttoprocess) &&
+ (rxpktprocessed < budget)) {
+ struct status_64 *status;
+ __be16 rx_csum;
+
+ cb = &priv->rx_cbs[ring->read_ptr];
+ skb = bcmgenet_rx_refill(priv, cb);
+
+ if (unlikely(!skb)) {
+ ring->dropped++;
+ goto next;
+ }
+
+ status = (struct status_64 *)skb->data;
+ dma_length_status = status->length_status;
+ if (dev->features & NETIF_F_RXCSUM) {
+ rx_csum = (__force __be16)(status->rx_csum & 0xffff);
+ if (rx_csum) {
+ skb->csum = (__force __wsum)ntohs(rx_csum);
+ skb->ip_summed = CHECKSUM_COMPLETE;
+ }
+ }
+
+ /* DMA flags and length are still valid no matter how
+ * we got the Receive Status Vector (64B RSB or register)
+ */
+ dma_flag = dma_length_status & 0xffff;
+ len = dma_length_status >> DMA_BUFLENGTH_SHIFT;
+
+ netif_dbg(priv, rx_status, dev,
+ "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n",
+ __func__, p_index, ring->c_index,
+ ring->read_ptr, dma_length_status);
+
+ if (unlikely(len > RX_BUF_LENGTH)) {
+ netif_err(priv, rx_status, dev, "oversized packet\n");
+ dev->stats.rx_length_errors++;
+ dev->stats.rx_errors++;
+ dev_kfree_skb_any(skb);
+ goto next;
+ }
+
+ if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
+ netif_err(priv, rx_status, dev,
+ "dropping fragmented packet!\n");
+ ring->errors++;
+ dev_kfree_skb_any(skb);
+ goto next;
+ }
+
+ /* report errors */
+ if (unlikely(dma_flag & (DMA_RX_CRC_ERROR |
+ DMA_RX_OV |
+ DMA_RX_NO |
+ DMA_RX_LG |
+ DMA_RX_RXER))) {
+ netif_err(priv, rx_status, dev, "dma_flag=0x%x\n",
+ (unsigned int)dma_flag);
+ if (dma_flag & DMA_RX_CRC_ERROR)
+ dev->stats.rx_crc_errors++;
+ if (dma_flag & DMA_RX_OV)
+ dev->stats.rx_over_errors++;
+ if (dma_flag & DMA_RX_NO)
+ dev->stats.rx_frame_errors++;
+ if (dma_flag & DMA_RX_LG)
+ dev->stats.rx_length_errors++;
+ dev->stats.rx_errors++;
+ dev_kfree_skb_any(skb);
+ goto next;
+ } /* error packet */
+
+ skb_put(skb, len);
+
+ /* remove RSB and hardware 2bytes added for IP alignment */
+ skb_pull(skb, 66);
+ len -= 66;
+
+ if (priv->crc_fwd_en) {
+ skb_trim(skb, len - ETH_FCS_LEN);
+ len -= ETH_FCS_LEN;
+ }
+
+ bytes_processed += len;
+
+ /*Finish setting up the received SKB and send it to the kernel*/
+ skb->protocol = eth_type_trans(skb, priv->dev);
+ ring->packets++;
+ ring->bytes += len;
+ if (dma_flag & DMA_RX_MULT)
+ dev->stats.multicast++;
+
+ /* Notify kernel */
+ napi_gro_receive(&ring->napi, skb);
+ netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
+
+next:
+ rxpktprocessed++;
+ if (likely(ring->read_ptr < ring->end_ptr))
+ ring->read_ptr++;
+ else
+ ring->read_ptr = ring->cb_ptr;
+
+ ring->c_index = (ring->c_index + 1) & DMA_C_INDEX_MASK;
+ bcmgenet_rdma_ring_writel(priv, ring->index, ring->c_index, RDMA_CONS_INDEX);
+ }
+
+ ring->dim.bytes = bytes_processed;
+ ring->dim.packets = rxpktprocessed;
+
+ return rxpktprocessed;
+}
+
+/* Rx NAPI polling method */
+static int bcmgenet_rx_poll(struct napi_struct *napi, int budget)
+{
+ struct bcmgenet_rx_ring *ring = container_of(napi,
+ struct bcmgenet_rx_ring, napi);
+ struct dim_sample dim_sample = {};
+ unsigned int work_done;
+
+ work_done = bcmgenet_desc_rx(ring, budget);
+
+ if (work_done < budget) {
+ napi_complete_done(napi, work_done);
+ ring->int_enable(ring);
+ }
+
+ if (ring->dim.use_dim) {
+ dim_update_sample(ring->dim.event_ctr, ring->dim.packets,
+ ring->dim.bytes, &dim_sample);
+ net_dim(&ring->dim.dim, dim_sample);
+ }
+
+ return work_done;
+}
+
+static void bcmgenet_dim_work(struct work_struct *work)
+{
+ struct dim *dim = container_of(work, struct dim, work);
+ struct bcmgenet_net_dim *ndim =
+ container_of(dim, struct bcmgenet_net_dim, dim);
+ struct bcmgenet_rx_ring *ring =
+ container_of(ndim, struct bcmgenet_rx_ring, dim);
+ struct dim_cq_moder cur_profile =
+ net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
+
+ bcmgenet_set_rx_coalesce(ring, cur_profile.usec, cur_profile.pkts);
+ dim->state = DIM_START_MEASURE;
+}
+
+/* Assign skb to RX DMA descriptor. */
+static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
+ struct bcmgenet_rx_ring *ring)
+{
+ struct enet_cb *cb;
+ struct sk_buff *skb;
+ int i;
+
+ netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
+
+ /* loop here for each buffer needing assign */
+ for (i = 0; i < ring->size; i++) {
+ cb = ring->cbs + i;
+ skb = bcmgenet_rx_refill(priv, cb);
+ if (skb)
+ dev_consume_skb_any(skb);
+ if (!cb->skb)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
+{
+ struct sk_buff *skb;
+ struct enet_cb *cb;
+ int i;
+
+ for (i = 0; i < priv->num_rx_bds; i++) {
+ cb = &priv->rx_cbs[i];
+
+ skb = bcmgenet_free_rx_cb(&priv->pdev->dev, cb);
+ if (skb)
+ dev_consume_skb_any(skb);
+ }
+}
+
+static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable)
+{
+ u32 reg;
+
+ reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+ if (reg & CMD_SW_RESET)
+ return;
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+
+ /* UniMAC stops on a packet boundary, wait for a full-size packet
+ * to be processed
+ */
+ if (enable == 0)
+ usleep_range(1000, 2000);
+}
+
+static void reset_umac(struct bcmgenet_priv *priv)
+{
+ /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */
+ bcmgenet_rbuf_ctrl_set(priv, 0);
+ udelay(10);
+
+ /* issue soft reset and disable MAC while updating its registers */
+ bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD);
+ udelay(2);
+}
+
+static void bcmgenet_intr_disable(struct bcmgenet_priv *priv)
+{
+ /* Mask all interrupts.*/
+ bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
+ bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
+ bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
+ bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
+}
+
+static void bcmgenet_link_intr_enable(struct bcmgenet_priv *priv)
+{
+ u32 int0_enable = 0;
+
+ /* Monitor cable plug/unplugged event for internal PHY, external PHY
+ * and MoCA PHY
+ */
+ if (priv->internal_phy) {
+ int0_enable |= UMAC_IRQ_LINK_EVENT;
+ if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv))
+ int0_enable |= UMAC_IRQ_PHY_DET_R;
+ } else if (priv->ext_phy) {
+ int0_enable |= UMAC_IRQ_LINK_EVENT;
+ } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
+ if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)
+ int0_enable |= UMAC_IRQ_LINK_EVENT;
+ }
+ bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
+}
+
+static void init_umac(struct bcmgenet_priv *priv)
+{
+ struct device *kdev = &priv->pdev->dev;
+ u32 reg;
+ u32 int0_enable = 0;
+
+ dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n");
+
+ reset_umac(priv);
+
+ /* clear tx/rx counter */
+ bcmgenet_umac_writel(priv,
+ MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT,
+ UMAC_MIB_CTRL);
+ bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL);
+
+ bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
+
+ /* init tx registers, enable TSB */
+ reg = bcmgenet_tbuf_ctrl_get(priv);
+ reg |= TBUF_64B_EN;
+ bcmgenet_tbuf_ctrl_set(priv, reg);
+
+ /* init rx registers, enable ip header optimization and RSB */
+ reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
+ reg |= RBUF_ALIGN_2B | RBUF_64B_EN;
+ bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL);
+
+ /* enable rx checksumming */
+ reg = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
+ reg |= RBUF_RXCHK_EN | RBUF_L3_PARSE_DIS;
+ /* If UniMAC forwards CRC, we need to skip over it to get
+ * a valid CHK bit to be set in the per-packet status word
+ */
+ if (priv->crc_fwd_en)
+ reg |= RBUF_SKIP_FCS;
+ else
+ reg &= ~RBUF_SKIP_FCS;
+ bcmgenet_rbuf_writel(priv, reg, RBUF_CHK_CTRL);
+
+ if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv))
+ bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL);
+
+ bcmgenet_intr_disable(priv);
+
+ /* Configure backpressure vectors for MoCA */
+ if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
+ reg = bcmgenet_bp_mc_get(priv);
+ reg |= BIT(priv->hw_params->bp_in_en_shift);
+
+ /* bp_mask: back pressure mask */
+ if (netif_is_multiqueue(priv->dev))
+ reg |= priv->hw_params->bp_in_mask;
+ else
+ reg &= ~priv->hw_params->bp_in_mask;
+ bcmgenet_bp_mc_set(priv, reg);
+ }
+
+ /* Enable MDIO interrupts on GENET v3+ */
+ if (priv->hw_params->flags & GENET_HAS_MDIO_INTR)
+ int0_enable |= (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
+
+ bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
+
+ dev_dbg(kdev, "done init umac\n");
+}
+
+static void bcmgenet_init_dim(struct bcmgenet_rx_ring *ring,
+ void (*cb)(struct work_struct *work))
+{
+ struct bcmgenet_net_dim *dim = &ring->dim;
+
+ INIT_WORK(&dim->dim.work, cb);
+ dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
+ dim->event_ctr = 0;
+ dim->packets = 0;
+ dim->bytes = 0;
+}
+
+static void bcmgenet_init_rx_coalesce(struct bcmgenet_rx_ring *ring)
+{
+ struct bcmgenet_net_dim *dim = &ring->dim;
+ struct dim_cq_moder moder;
+ u32 usecs, pkts;
+
+ usecs = ring->rx_coalesce_usecs;
+ pkts = ring->rx_max_coalesced_frames;
+
+ /* If DIM was enabled, re-apply default parameters */
+ if (dim->use_dim) {
+ moder = net_dim_get_def_rx_moderation(dim->dim.mode);
+ usecs = moder.usec;
+ pkts = moder.pkts;
+ }
+
+ bcmgenet_set_rx_coalesce(ring, usecs, pkts);
+}
+
+/* Initialize a Tx ring along with corresponding hardware registers */
+static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv,
+ unsigned int index, unsigned int size,
+ unsigned int start_ptr, unsigned int end_ptr)
+{
+ struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
+ u32 words_per_bd = WORDS_PER_BD(priv);
+ u32 flow_period_val = 0;
+
+ spin_lock_init(&ring->lock);
+ ring->priv = priv;
+ ring->index = index;
+ if (index == DESC_INDEX) {
+ ring->queue = 0;
+ ring->int_enable = bcmgenet_tx_ring16_int_enable;
+ ring->int_disable = bcmgenet_tx_ring16_int_disable;
+ } else {
+ ring->queue = index + 1;
+ ring->int_enable = bcmgenet_tx_ring_int_enable;
+ ring->int_disable = bcmgenet_tx_ring_int_disable;
+ }
+ ring->cbs = priv->tx_cbs + start_ptr;
+ ring->size = size;
+ ring->clean_ptr = start_ptr;
+ ring->c_index = 0;
+ ring->free_bds = size;
+ ring->write_ptr = start_ptr;
+ ring->cb_ptr = start_ptr;
+ ring->end_ptr = end_ptr - 1;
+ ring->prod_index = 0;
+
+ /* Set flow period for ring != 16 */
+ if (index != DESC_INDEX)
+ flow_period_val = ENET_MAX_MTU_SIZE << 16;
+
+ bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX);
+ bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX);
+ bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
+ /* Disable rate control for now */
+ bcmgenet_tdma_ring_writel(priv, index, flow_period_val,
+ TDMA_FLOW_PERIOD);
+ bcmgenet_tdma_ring_writel(priv, index,
+ ((size << DMA_RING_SIZE_SHIFT) |
+ RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
+
+ /* Set start and end address, read and write pointers */
+ bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ DMA_START_ADDR);
+ bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ TDMA_READ_PTR);
+ bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ TDMA_WRITE_PTR);
+ bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
+ DMA_END_ADDR);
+
+ /* Initialize Tx NAPI */
+ netif_napi_add_tx(priv->dev, &ring->napi, bcmgenet_tx_poll);
+}
+
+/* Initialize a RDMA ring */
+static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
+ unsigned int index, unsigned int size,
+ unsigned int start_ptr, unsigned int end_ptr)
+{
+ struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
+ u32 words_per_bd = WORDS_PER_BD(priv);
+ int ret;
+
+ ring->priv = priv;
+ ring->index = index;
+ if (index == DESC_INDEX) {
+ ring->int_enable = bcmgenet_rx_ring16_int_enable;
+ ring->int_disable = bcmgenet_rx_ring16_int_disable;
+ } else {
+ ring->int_enable = bcmgenet_rx_ring_int_enable;
+ ring->int_disable = bcmgenet_rx_ring_int_disable;
+ }
+ ring->cbs = priv->rx_cbs + start_ptr;
+ ring->size = size;
+ ring->c_index = 0;
+ ring->read_ptr = start_ptr;
+ ring->cb_ptr = start_ptr;
+ ring->end_ptr = end_ptr - 1;
+
+ ret = bcmgenet_alloc_rx_buffers(priv, ring);
+ if (ret)
+ return ret;
+
+ bcmgenet_init_dim(ring, bcmgenet_dim_work);
+ bcmgenet_init_rx_coalesce(ring);
+
+ /* Initialize Rx NAPI */
+ netif_napi_add(priv->dev, &ring->napi, bcmgenet_rx_poll);
+
+ bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX);
+ bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX);
+ bcmgenet_rdma_ring_writel(priv, index,
+ ((size << DMA_RING_SIZE_SHIFT) |
+ RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
+ bcmgenet_rdma_ring_writel(priv, index,
+ (DMA_FC_THRESH_LO <<
+ DMA_XOFF_THRESHOLD_SHIFT) |
+ DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
+
+ /* Set start and end address, read and write pointers */
+ bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ DMA_START_ADDR);
+ bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ RDMA_READ_PTR);
+ bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
+ RDMA_WRITE_PTR);
+ bcmgenet_rdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
+ DMA_END_ADDR);
+
+ return ret;
+}
+
+static void bcmgenet_enable_tx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_tx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->tx_queues; ++i) {
+ ring = &priv->tx_rings[i];
+ napi_enable(&ring->napi);
+ ring->int_enable(ring);
+ }
+
+ ring = &priv->tx_rings[DESC_INDEX];
+ napi_enable(&ring->napi);
+ ring->int_enable(ring);
+}
+
+static void bcmgenet_disable_tx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_tx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->tx_queues; ++i) {
+ ring = &priv->tx_rings[i];
+ napi_disable(&ring->napi);
+ }
+
+ ring = &priv->tx_rings[DESC_INDEX];
+ napi_disable(&ring->napi);
+}
+
+static void bcmgenet_fini_tx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_tx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->tx_queues; ++i) {
+ ring = &priv->tx_rings[i];
+ netif_napi_del(&ring->napi);
+ }
+
+ ring = &priv->tx_rings[DESC_INDEX];
+ netif_napi_del(&ring->napi);
+}
+
+/* Initialize Tx queues
+ *
+ * Queues 0-3 are priority-based, each one has 32 descriptors,
+ * with queue 0 being the highest priority queue.
+ *
+ * Queue 16 is the default Tx queue with
+ * GENET_Q16_TX_BD_CNT = 256 - 4 * 32 = 128 descriptors.
+ *
+ * The transmit control block pool is then partitioned as follows:
+ * - Tx queue 0 uses tx_cbs[0..31]
+ * - Tx queue 1 uses tx_cbs[32..63]
+ * - Tx queue 2 uses tx_cbs[64..95]
+ * - Tx queue 3 uses tx_cbs[96..127]
+ * - Tx queue 16 uses tx_cbs[128..255]
+ */
+static void bcmgenet_init_tx_queues(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ u32 i, dma_enable;
+ u32 dma_ctrl, ring_cfg;
+ u32 dma_priority[3] = {0, 0, 0};
+
+ dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL);
+ dma_enable = dma_ctrl & DMA_EN;
+ dma_ctrl &= ~DMA_EN;
+ bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
+
+ dma_ctrl = 0;
+ ring_cfg = 0;
+
+ /* Enable strict priority arbiter mode */
+ bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
+
+ /* Initialize Tx priority queues */
+ for (i = 0; i < priv->hw_params->tx_queues; i++) {
+ bcmgenet_init_tx_ring(priv, i, priv->hw_params->tx_bds_per_q,
+ i * priv->hw_params->tx_bds_per_q,
+ (i + 1) * priv->hw_params->tx_bds_per_q);
+ ring_cfg |= (1 << i);
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ dma_priority[DMA_PRIO_REG_INDEX(i)] |=
+ ((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
+ }
+
+ /* Initialize Tx default queue 16 */
+ bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_Q16_TX_BD_CNT,
+ priv->hw_params->tx_queues *
+ priv->hw_params->tx_bds_per_q,
+ TOTAL_DESC);
+ ring_cfg |= (1 << DESC_INDEX);
+ dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
+ dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
+ ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
+ DMA_PRIO_REG_SHIFT(DESC_INDEX));
+
+ /* Set Tx queue priorities */
+ bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
+ bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
+ bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
+
+ /* Enable Tx queues */
+ bcmgenet_tdma_writel(priv, ring_cfg, DMA_RING_CFG);
+
+ /* Enable Tx DMA */
+ if (dma_enable)
+ dma_ctrl |= DMA_EN;
+ bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
+}
+
+static void bcmgenet_enable_rx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_rx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->rx_queues; ++i) {
+ ring = &priv->rx_rings[i];
+ napi_enable(&ring->napi);
+ ring->int_enable(ring);
+ }
+
+ ring = &priv->rx_rings[DESC_INDEX];
+ napi_enable(&ring->napi);
+ ring->int_enable(ring);
+}
+
+static void bcmgenet_disable_rx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_rx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->rx_queues; ++i) {
+ ring = &priv->rx_rings[i];
+ napi_disable(&ring->napi);
+ cancel_work_sync(&ring->dim.dim.work);
+ }
+
+ ring = &priv->rx_rings[DESC_INDEX];
+ napi_disable(&ring->napi);
+ cancel_work_sync(&ring->dim.dim.work);
+}
+
+static void bcmgenet_fini_rx_napi(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ struct bcmgenet_rx_ring *ring;
+
+ for (i = 0; i < priv->hw_params->rx_queues; ++i) {
+ ring = &priv->rx_rings[i];
+ netif_napi_del(&ring->napi);
+ }
+
+ ring = &priv->rx_rings[DESC_INDEX];
+ netif_napi_del(&ring->napi);
+}
+
+/* Initialize Rx queues
+ *
+ * Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
+ * used to direct traffic to these queues.
+ *
+ * Queue 16 is the default Rx queue with GENET_Q16_RX_BD_CNT descriptors.
+ */
+static int bcmgenet_init_rx_queues(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ u32 i;
+ u32 dma_enable;
+ u32 dma_ctrl;
+ u32 ring_cfg;
+ int ret;
+
+ dma_ctrl = bcmgenet_rdma_readl(priv, DMA_CTRL);
+ dma_enable = dma_ctrl & DMA_EN;
+ dma_ctrl &= ~DMA_EN;
+ bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
+
+ dma_ctrl = 0;
+ ring_cfg = 0;
+
+ /* Initialize Rx priority queues */
+ for (i = 0; i < priv->hw_params->rx_queues; i++) {
+ ret = bcmgenet_init_rx_ring(priv, i,
+ priv->hw_params->rx_bds_per_q,
+ i * priv->hw_params->rx_bds_per_q,
+ (i + 1) *
+ priv->hw_params->rx_bds_per_q);
+ if (ret)
+ return ret;
+
+ ring_cfg |= (1 << i);
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ }
+
+ /* Initialize Rx default queue 16 */
+ ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, GENET_Q16_RX_BD_CNT,
+ priv->hw_params->rx_queues *
+ priv->hw_params->rx_bds_per_q,
+ TOTAL_DESC);
+ if (ret)
+ return ret;
+
+ ring_cfg |= (1 << DESC_INDEX);
+ dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
+
+ /* Enable rings */
+ bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
+
+ /* Configure ring as descriptor ring and re-enable DMA if enabled */
+ if (dma_enable)
+ dma_ctrl |= DMA_EN;
+ bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
+
+ return 0;
+}
+
+static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
+{
+ int ret = 0;
+ int timeout = 0;
+ u32 reg;
+ u32 dma_ctrl;
+ int i;
+
+ /* Disable TDMA to stop add more frames in TX DMA */
+ reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
+ reg &= ~DMA_EN;
+ bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
+
+ /* Check TDMA status register to confirm TDMA is disabled */
+ while (timeout++ < DMA_TIMEOUT_VAL) {
+ reg = bcmgenet_tdma_readl(priv, DMA_STATUS);
+ if (reg & DMA_DISABLED)
+ break;
+
+ udelay(1);
+ }
+
+ if (timeout == DMA_TIMEOUT_VAL) {
+ netdev_warn(priv->dev, "Timed out while disabling TX DMA\n");
+ ret = -ETIMEDOUT;
+ }
+
+ /* Wait 10ms for packet drain in both tx and rx dma */
+ usleep_range(10000, 20000);
+
+ /* Disable RDMA */
+ reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
+ reg &= ~DMA_EN;
+ bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
+
+ timeout = 0;
+ /* Check RDMA status register to confirm RDMA is disabled */
+ while (timeout++ < DMA_TIMEOUT_VAL) {
+ reg = bcmgenet_rdma_readl(priv, DMA_STATUS);
+ if (reg & DMA_DISABLED)
+ break;
+
+ udelay(1);
+ }
+
+ if (timeout == DMA_TIMEOUT_VAL) {
+ netdev_warn(priv->dev, "Timed out while disabling RX DMA\n");
+ ret = -ETIMEDOUT;
+ }
+
+ dma_ctrl = 0;
+ for (i = 0; i < priv->hw_params->rx_queues; i++)
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
+ reg &= ~dma_ctrl;
+ bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
+
+ dma_ctrl = 0;
+ for (i = 0; i < priv->hw_params->tx_queues; i++)
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
+ reg &= ~dma_ctrl;
+ bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
+
+ return ret;
+}
+
+static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
+{
+ struct netdev_queue *txq;
+ int i;
+
+ bcmgenet_fini_rx_napi(priv);
+ bcmgenet_fini_tx_napi(priv);
+
+ for (i = 0; i < priv->num_tx_bds; i++)
+ dev_kfree_skb(bcmgenet_free_tx_cb(&priv->pdev->dev,
+ priv->tx_cbs + i));
+
+ for (i = 0; i < priv->hw_params->tx_queues; i++) {
+ txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[i].queue);
+ netdev_tx_reset_queue(txq);
+ }
+
+ txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[DESC_INDEX].queue);
+ netdev_tx_reset_queue(txq);
+
+ bcmgenet_free_rx_buffers(priv);
+ kfree(priv->rx_cbs);
+ kfree(priv->tx_cbs);
+}
+
+/* init_edma: Initialize DMA control register */
+static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
+{
+ int ret;
+ unsigned int i;
+ struct enet_cb *cb;
+
+ netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
+
+ /* Initialize common Rx ring structures */
+ priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
+ priv->num_rx_bds = TOTAL_DESC;
+ priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
+ GFP_KERNEL);
+ if (!priv->rx_cbs)
+ return -ENOMEM;
+
+ for (i = 0; i < priv->num_rx_bds; i++) {
+ cb = priv->rx_cbs + i;
+ cb->bd_addr = priv->rx_bds + i * DMA_DESC_SIZE;
+ }
+
+ /* Initialize common TX ring structures */
+ priv->tx_bds = priv->base + priv->hw_params->tdma_offset;
+ priv->num_tx_bds = TOTAL_DESC;
+ priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb),
+ GFP_KERNEL);
+ if (!priv->tx_cbs) {
+ kfree(priv->rx_cbs);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < priv->num_tx_bds; i++) {
+ cb = priv->tx_cbs + i;
+ cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;
+ }
+
+ /* Init rDma */
+ bcmgenet_rdma_writel(priv, priv->dma_max_burst_length,
+ DMA_SCB_BURST_SIZE);
+
+ /* Initialize Rx queues */
+ ret = bcmgenet_init_rx_queues(priv->dev);
+ if (ret) {
+ netdev_err(priv->dev, "failed to initialize Rx queues\n");
+ bcmgenet_free_rx_buffers(priv);
+ kfree(priv->rx_cbs);
+ kfree(priv->tx_cbs);
+ return ret;
+ }
+
+ /* Init tDma */
+ bcmgenet_tdma_writel(priv, priv->dma_max_burst_length,
+ DMA_SCB_BURST_SIZE);
+
+ /* Initialize Tx queues */
+ bcmgenet_init_tx_queues(priv->dev);
+
+ return 0;
+}
+
+/* Interrupt bottom half */
+static void bcmgenet_irq_task(struct work_struct *work)
+{
+ unsigned int status;
+ struct bcmgenet_priv *priv = container_of(
+ work, struct bcmgenet_priv, bcmgenet_irq_work);
+
+ netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
+
+ spin_lock_irq(&priv->lock);
+ status = priv->irq0_stat;
+ priv->irq0_stat = 0;
+ spin_unlock_irq(&priv->lock);
+
+ if (status & UMAC_IRQ_PHY_DET_R &&
+ priv->dev->phydev->autoneg != AUTONEG_ENABLE) {
+ phy_init_hw(priv->dev->phydev);
+ genphy_config_aneg(priv->dev->phydev);
+ }
+
+ /* Link UP/DOWN event */
+ if (status & UMAC_IRQ_LINK_EVENT)
+ phy_mac_interrupt(priv->dev->phydev);
+
+}
+
+/* bcmgenet_isr1: handle Rx and Tx priority queues */
+static irqreturn_t bcmgenet_isr1(int irq, void *dev_id)
+{
+ struct bcmgenet_priv *priv = dev_id;
+ struct bcmgenet_rx_ring *rx_ring;
+ struct bcmgenet_tx_ring *tx_ring;
+ unsigned int index, status;
+
+ /* Read irq status */
+ status = bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
+ ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
+
+ /* clear interrupts */
+ bcmgenet_intrl2_1_writel(priv, status, INTRL2_CPU_CLEAR);
+
+ netif_dbg(priv, intr, priv->dev,
+ "%s: IRQ=0x%x\n", __func__, status);
+
+ /* Check Rx priority queue interrupts */
+ for (index = 0; index < priv->hw_params->rx_queues; index++) {
+ if (!(status & BIT(UMAC_IRQ1_RX_INTR_SHIFT + index)))
+ continue;
+
+ rx_ring = &priv->rx_rings[index];
+ rx_ring->dim.event_ctr++;
+
+ if (likely(napi_schedule_prep(&rx_ring->napi))) {
+ rx_ring->int_disable(rx_ring);
+ __napi_schedule_irqoff(&rx_ring->napi);
+ }
+ }
+
+ /* Check Tx priority queue interrupts */
+ for (index = 0; index < priv->hw_params->tx_queues; index++) {
+ if (!(status & BIT(index)))
+ continue;
+
+ tx_ring = &priv->tx_rings[index];
+
+ if (likely(napi_schedule_prep(&tx_ring->napi))) {
+ tx_ring->int_disable(tx_ring);
+ __napi_schedule_irqoff(&tx_ring->napi);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+/* bcmgenet_isr0: handle Rx and Tx default queues + other stuff */
+static irqreturn_t bcmgenet_isr0(int irq, void *dev_id)
+{
+ struct bcmgenet_priv *priv = dev_id;
+ struct bcmgenet_rx_ring *rx_ring;
+ struct bcmgenet_tx_ring *tx_ring;
+ unsigned int status;
+ unsigned long flags;
+
+ /* Read irq status */
+ status = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) &
+ ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
+
+ /* clear interrupts */
+ bcmgenet_intrl2_0_writel(priv, status, INTRL2_CPU_CLEAR);
+
+ netif_dbg(priv, intr, priv->dev,
+ "IRQ=0x%x\n", status);
+
+ if (status & UMAC_IRQ_RXDMA_DONE) {
+ rx_ring = &priv->rx_rings[DESC_INDEX];
+ rx_ring->dim.event_ctr++;
+
+ if (likely(napi_schedule_prep(&rx_ring->napi))) {
+ rx_ring->int_disable(rx_ring);
+ __napi_schedule_irqoff(&rx_ring->napi);
+ }
+ }
+
+ if (status & UMAC_IRQ_TXDMA_DONE) {
+ tx_ring = &priv->tx_rings[DESC_INDEX];
+
+ if (likely(napi_schedule_prep(&tx_ring->napi))) {
+ tx_ring->int_disable(tx_ring);
+ __napi_schedule_irqoff(&tx_ring->napi);
+ }
+ }
+
+ if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
+ status & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) {
+ wake_up(&priv->wq);
+ }
+
+ /* all other interested interrupts handled in bottom half */
+ status &= (UMAC_IRQ_LINK_EVENT | UMAC_IRQ_PHY_DET_R);
+ if (status) {
+ /* Save irq status for bottom-half processing. */
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->irq0_stat |= status;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ schedule_work(&priv->bcmgenet_irq_work);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id)
+{
+ /* Acknowledge the interrupt */
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void bcmgenet_poll_controller(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ /* Invoke the main RX/TX interrupt handler */
+ disable_irq(priv->irq0);
+ bcmgenet_isr0(priv->irq0, priv);
+ enable_irq(priv->irq0);
+
+ /* And the interrupt handler for RX/TX priority queues */
+ disable_irq(priv->irq1);
+ bcmgenet_isr1(priv->irq1, priv);
+ enable_irq(priv->irq1);
+}
+#endif
+
+static void bcmgenet_umac_reset(struct bcmgenet_priv *priv)
+{
+ u32 reg;
+
+ reg = bcmgenet_rbuf_ctrl_get(priv);
+ reg |= BIT(1);
+ bcmgenet_rbuf_ctrl_set(priv, reg);
+ udelay(10);
+
+ reg &= ~BIT(1);
+ bcmgenet_rbuf_ctrl_set(priv, reg);
+ udelay(10);
+}
+
+static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv,
+ const unsigned char *addr)
+{
+ bcmgenet_umac_writel(priv, get_unaligned_be32(&addr[0]), UMAC_MAC0);
+ bcmgenet_umac_writel(priv, get_unaligned_be16(&addr[4]), UMAC_MAC1);
+}
+
+static void bcmgenet_get_hw_addr(struct bcmgenet_priv *priv,
+ unsigned char *addr)
+{
+ u32 addr_tmp;
+
+ addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC0);
+ put_unaligned_be32(addr_tmp, &addr[0]);
+ addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC1);
+ put_unaligned_be16(addr_tmp, &addr[4]);
+}
+
+/* Returns a reusable dma control register value */
+static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
+{
+ unsigned int i;
+ u32 reg;
+ u32 dma_ctrl;
+
+ /* disable DMA */
+ dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
+ for (i = 0; i < priv->hw_params->tx_queues; i++)
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
+ reg &= ~dma_ctrl;
+ bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
+
+ dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
+ for (i = 0; i < priv->hw_params->rx_queues; i++)
+ dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+ reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
+ reg &= ~dma_ctrl;
+ bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
+
+ bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH);
+ udelay(10);
+ bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
+
+ return dma_ctrl;
+}
+
+static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
+{
+ u32 reg;
+
+ reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
+ reg |= dma_ctrl;
+ bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
+
+ reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
+ reg |= dma_ctrl;
+ bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
+}
+
+static void bcmgenet_netif_start(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ /* Start the network engine */
+ bcmgenet_set_rx_mode(dev);
+ bcmgenet_enable_rx_napi(priv);
+
+ umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
+
+ bcmgenet_enable_tx_napi(priv);
+
+ /* Monitor link interrupts now */
+ bcmgenet_link_intr_enable(priv);
+
+ phy_start(dev->phydev);
+}
+
+static int bcmgenet_open(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ unsigned long dma_ctrl;
+ int ret;
+
+ netif_dbg(priv, ifup, dev, "bcmgenet_open\n");
+
+ /* Turn on the clock */
+ clk_prepare_enable(priv->clk);
+
+ /* If this is an internal GPHY, power it back on now, before UniMAC is
+ * brought out of reset as absolutely no UniMAC activity is allowed
+ */
+ if (priv->internal_phy)
+ bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
+
+ /* take MAC out of reset */
+ bcmgenet_umac_reset(priv);
+
+ init_umac(priv);
+
+ /* Apply features again in case we changed them while interface was
+ * down
+ */
+ bcmgenet_set_features(dev, dev->features);
+
+ bcmgenet_set_hw_addr(priv, dev->dev_addr);
+
+ /* Disable RX/TX DMA and flush TX queues */
+ dma_ctrl = bcmgenet_dma_disable(priv);
+
+ /* Reinitialize TDMA and RDMA and SW housekeeping */
+ ret = bcmgenet_init_dma(priv);
+ if (ret) {
+ netdev_err(dev, "failed to initialize DMA\n");
+ goto err_clk_disable;
+ }
+
+ /* Always enable ring 16 - descriptor ring */
+ bcmgenet_enable_dma(priv, dma_ctrl);
+
+ /* HFB init */
+ bcmgenet_hfb_init(priv);
+
+ ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED,
+ dev->name, priv);
+ if (ret < 0) {
+ netdev_err(dev, "can't request IRQ %d\n", priv->irq0);
+ goto err_fini_dma;
+ }
+
+ ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED,
+ dev->name, priv);
+ if (ret < 0) {
+ netdev_err(dev, "can't request IRQ %d\n", priv->irq1);
+ goto err_irq0;
+ }
+
+ ret = bcmgenet_mii_probe(dev);
+ if (ret) {
+ netdev_err(dev, "failed to connect to PHY\n");
+ goto err_irq1;
+ }
+
+ bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
+
+ bcmgenet_netif_start(dev);
+
+ netif_tx_start_all_queues(dev);
+
+ return 0;
+
+err_irq1:
+ free_irq(priv->irq1, priv);
+err_irq0:
+ free_irq(priv->irq0, priv);
+err_fini_dma:
+ bcmgenet_dma_teardown(priv);
+ bcmgenet_fini_dma(priv);
+err_clk_disable:
+ if (priv->internal_phy)
+ bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
+ clk_disable_unprepare(priv->clk);
+ return ret;
+}
+
+static void bcmgenet_netif_stop(struct net_device *dev, bool stop_phy)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ bcmgenet_disable_tx_napi(priv);
+ netif_tx_disable(dev);
+
+ /* Disable MAC receive */
+ umac_enable_set(priv, CMD_RX_EN, false);
+
+ bcmgenet_dma_teardown(priv);
+
+ /* Disable MAC transmit. TX DMA disabled must be done before this */
+ umac_enable_set(priv, CMD_TX_EN, false);
+
+ if (stop_phy)
+ phy_stop(dev->phydev);
+ bcmgenet_disable_rx_napi(priv);
+ bcmgenet_intr_disable(priv);
+
+ /* Wait for pending work items to complete. Since interrupts are
+ * disabled no new work will be scheduled.
+ */
+ cancel_work_sync(&priv->bcmgenet_irq_work);
+
+ /* tx reclaim */
+ bcmgenet_tx_reclaim_all(dev);
+ bcmgenet_fini_dma(priv);
+}
+
+static int bcmgenet_close(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int ret = 0;
+
+ netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
+
+ bcmgenet_netif_stop(dev, false);
+
+ /* Really kill the PHY state machine and disconnect from it */
+ phy_disconnect(dev->phydev);
+
+ free_irq(priv->irq0, priv);
+ free_irq(priv->irq1, priv);
+
+ if (priv->internal_phy)
+ ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
+
+ clk_disable_unprepare(priv->clk);
+
+ return ret;
+}
+
+static void bcmgenet_dump_tx_queue(struct bcmgenet_tx_ring *ring)
+{
+ struct bcmgenet_priv *priv = ring->priv;
+ u32 p_index, c_index, intsts, intmsk;
+ struct netdev_queue *txq;
+ unsigned int free_bds;
+ bool txq_stopped;
+
+ if (!netif_msg_tx_err(priv))
+ return;
+
+ txq = netdev_get_tx_queue(priv->dev, ring->queue);
+
+ spin_lock(&ring->lock);
+ if (ring->index == DESC_INDEX) {
+ intsts = ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
+ intmsk = UMAC_IRQ_TXDMA_DONE | UMAC_IRQ_TXDMA_MBDONE;
+ } else {
+ intsts = ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
+ intmsk = 1 << ring->index;
+ }
+ c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
+ p_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_PROD_INDEX);
+ txq_stopped = netif_tx_queue_stopped(txq);
+ free_bds = ring->free_bds;
+ spin_unlock(&ring->lock);
+
+ netif_err(priv, tx_err, priv->dev, "Ring %d queue %d status summary\n"
+ "TX queue status: %s, interrupts: %s\n"
+ "(sw)free_bds: %d (sw)size: %d\n"
+ "(sw)p_index: %d (hw)p_index: %d\n"
+ "(sw)c_index: %d (hw)c_index: %d\n"
+ "(sw)clean_p: %d (sw)write_p: %d\n"
+ "(sw)cb_ptr: %d (sw)end_ptr: %d\n",
+ ring->index, ring->queue,
+ txq_stopped ? "stopped" : "active",
+ intsts & intmsk ? "enabled" : "disabled",
+ free_bds, ring->size,
+ ring->prod_index, p_index & DMA_P_INDEX_MASK,
+ ring->c_index, c_index & DMA_C_INDEX_MASK,
+ ring->clean_ptr, ring->write_ptr,
+ ring->cb_ptr, ring->end_ptr);
+}
+
+static void bcmgenet_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ u32 int0_enable = 0;
+ u32 int1_enable = 0;
+ unsigned int q;
+
+ netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
+
+ for (q = 0; q < priv->hw_params->tx_queues; q++)
+ bcmgenet_dump_tx_queue(&priv->tx_rings[q]);
+ bcmgenet_dump_tx_queue(&priv->tx_rings[DESC_INDEX]);
+
+ bcmgenet_tx_reclaim_all(dev);
+
+ for (q = 0; q < priv->hw_params->tx_queues; q++)
+ int1_enable |= (1 << q);
+
+ int0_enable = UMAC_IRQ_TXDMA_DONE;
+
+ /* Re-enable TX interrupts if disabled */
+ bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
+ bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
+
+ netif_trans_update(dev);
+
+ dev->stats.tx_errors++;
+
+ netif_tx_wake_all_queues(dev);
+}
+
+#define MAX_MDF_FILTER 17
+
+static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv,
+ const unsigned char *addr,
+ int *i)
+{
+ bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1],
+ UMAC_MDF_ADDR + (*i * 4));
+ bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 |
+ addr[4] << 8 | addr[5],
+ UMAC_MDF_ADDR + ((*i + 1) * 4));
+ *i += 2;
+}
+
+static void bcmgenet_set_rx_mode(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct netdev_hw_addr *ha;
+ int i, nfilter;
+ u32 reg;
+
+ netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags);
+
+ /* Number of filters needed */
+ nfilter = netdev_uc_count(dev) + netdev_mc_count(dev) + 2;
+
+ /*
+ * Turn on promicuous mode for three scenarios
+ * 1. IFF_PROMISC flag is set
+ * 2. IFF_ALLMULTI flag is set
+ * 3. The number of filters needed exceeds the number filters
+ * supported by the hardware.
+ */
+ reg = bcmgenet_umac_readl(priv, UMAC_CMD);
+ if ((dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) ||
+ (nfilter > MAX_MDF_FILTER)) {
+ reg |= CMD_PROMISC;
+ bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+ bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL);
+ return;
+ } else {
+ reg &= ~CMD_PROMISC;
+ bcmgenet_umac_writel(priv, reg, UMAC_CMD);
+ }
+
+ /* update MDF filter */
+ i = 0;
+ /* Broadcast */
+ bcmgenet_set_mdf_addr(priv, dev->broadcast, &i);
+ /* my own address.*/
+ bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i);
+
+ /* Unicast */
+ netdev_for_each_uc_addr(ha, dev)
+ bcmgenet_set_mdf_addr(priv, ha->addr, &i);
+
+ /* Multicast */
+ netdev_for_each_mc_addr(ha, dev)
+ bcmgenet_set_mdf_addr(priv, ha->addr, &i);
+
+ /* Enable filters */
+ reg = GENMASK(MAX_MDF_FILTER - 1, MAX_MDF_FILTER - nfilter);
+ bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL);
+}
+
+/* Set the hardware MAC address. */
+static int bcmgenet_set_mac_addr(struct net_device *dev, void *p)
+{
+ struct sockaddr *addr = p;
+
+ /* Setting the MAC address at the hardware level is not possible
+ * without disabling the UniMAC RX/TX enable bits.
+ */
+ if (netif_running(dev))
+ return -EBUSY;
+
+ eth_hw_addr_set(dev, addr->sa_data);
+
+ return 0;
+}
+
+static struct net_device_stats *bcmgenet_get_stats(struct net_device *dev)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ unsigned long tx_bytes = 0, tx_packets = 0;
+ unsigned long rx_bytes = 0, rx_packets = 0;
+ unsigned long rx_errors = 0, rx_dropped = 0;
+ struct bcmgenet_tx_ring *tx_ring;
+ struct bcmgenet_rx_ring *rx_ring;
+ unsigned int q;
+
+ for (q = 0; q < priv->hw_params->tx_queues; q++) {
+ tx_ring = &priv->tx_rings[q];
+ tx_bytes += tx_ring->bytes;
+ tx_packets += tx_ring->packets;
+ }
+ tx_ring = &priv->tx_rings[DESC_INDEX];
+ tx_bytes += tx_ring->bytes;
+ tx_packets += tx_ring->packets;
+
+ for (q = 0; q < priv->hw_params->rx_queues; q++) {
+ rx_ring = &priv->rx_rings[q];
+
+ rx_bytes += rx_ring->bytes;
+ rx_packets += rx_ring->packets;
+ rx_errors += rx_ring->errors;
+ rx_dropped += rx_ring->dropped;
+ }
+ rx_ring = &priv->rx_rings[DESC_INDEX];
+ rx_bytes += rx_ring->bytes;
+ rx_packets += rx_ring->packets;
+ rx_errors += rx_ring->errors;
+ rx_dropped += rx_ring->dropped;
+
+ dev->stats.tx_bytes = tx_bytes;
+ dev->stats.tx_packets = tx_packets;
+ dev->stats.rx_bytes = rx_bytes;
+ dev->stats.rx_packets = rx_packets;
+ dev->stats.rx_errors = rx_errors;
+ dev->stats.rx_missed_errors = rx_errors;
+ dev->stats.rx_dropped = rx_dropped;
+ return &dev->stats;
+}
+
+static int bcmgenet_change_carrier(struct net_device *dev, bool new_carrier)
+{
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ if (!dev->phydev || !phy_is_pseudo_fixed_link(dev->phydev) ||
+ priv->phy_interface != PHY_INTERFACE_MODE_MOCA)
+ return -EOPNOTSUPP;
+
+ if (new_carrier)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+
+ return 0;
+}
+
+static const struct net_device_ops bcmgenet_netdev_ops = {
+ .ndo_open = bcmgenet_open,
+ .ndo_stop = bcmgenet_close,
+ .ndo_start_xmit = bcmgenet_xmit,
+ .ndo_tx_timeout = bcmgenet_timeout,
+ .ndo_set_rx_mode = bcmgenet_set_rx_mode,
+ .ndo_set_mac_address = bcmgenet_set_mac_addr,
+ .ndo_eth_ioctl = phy_do_ioctl_running,
+ .ndo_set_features = bcmgenet_set_features,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = bcmgenet_poll_controller,
+#endif
+ .ndo_get_stats = bcmgenet_get_stats,
+ .ndo_change_carrier = bcmgenet_change_carrier,
+};
+
+/* Array of GENET hardware parameters/characteristics */
+static struct bcmgenet_hw_params bcmgenet_hw_params[] = {
+ [GENET_V1] = {
+ .tx_queues = 0,
+ .tx_bds_per_q = 0,
+ .rx_queues = 0,
+ .rx_bds_per_q = 0,
+ .bp_in_en_shift = 16,
+ .bp_in_mask = 0xffff,
+ .hfb_filter_cnt = 16,
+ .qtag_mask = 0x1F,
+ .hfb_offset = 0x1000,
+ .rdma_offset = 0x2000,
+ .tdma_offset = 0x3000,
+ .words_per_bd = 2,
+ },
+ [GENET_V2] = {
+ .tx_queues = 4,
+ .tx_bds_per_q = 32,
+ .rx_queues = 0,
+ .rx_bds_per_q = 0,
+ .bp_in_en_shift = 16,
+ .bp_in_mask = 0xffff,
+ .hfb_filter_cnt = 16,
+ .qtag_mask = 0x1F,
+ .tbuf_offset = 0x0600,
+ .hfb_offset = 0x1000,
+ .hfb_reg_offset = 0x2000,
+ .rdma_offset = 0x3000,
+ .tdma_offset = 0x4000,
+ .words_per_bd = 2,
+ .flags = GENET_HAS_EXT,
+ },
+ [GENET_V3] = {
+ .tx_queues = 4,
+ .tx_bds_per_q = 32,
+ .rx_queues = 0,
+ .rx_bds_per_q = 0,
+ .bp_in_en_shift = 17,
+ .bp_in_mask = 0x1ffff,
+ .hfb_filter_cnt = 48,
+ .hfb_filter_size = 128,
+ .qtag_mask = 0x3F,
+ .tbuf_offset = 0x0600,
+ .hfb_offset = 0x8000,
+ .hfb_reg_offset = 0xfc00,
+ .rdma_offset = 0x10000,
+ .tdma_offset = 0x11000,
+ .words_per_bd = 2,
+ .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR |
+ GENET_HAS_MOCA_LINK_DET,
+ },
+ [GENET_V4] = {
+ .tx_queues = 4,
+ .tx_bds_per_q = 32,
+ .rx_queues = 0,
+ .rx_bds_per_q = 0,
+ .bp_in_en_shift = 17,
+ .bp_in_mask = 0x1ffff,
+ .hfb_filter_cnt = 48,
+ .hfb_filter_size = 128,
+ .qtag_mask = 0x3F,
+ .tbuf_offset = 0x0600,
+ .hfb_offset = 0x8000,
+ .hfb_reg_offset = 0xfc00,
+ .rdma_offset = 0x2000,
+ .tdma_offset = 0x4000,
+ .words_per_bd = 3,
+ .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
+ GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
+ },
+ [GENET_V5] = {
+ .tx_queues = 4,
+ .tx_bds_per_q = 32,
+ .rx_queues = 0,
+ .rx_bds_per_q = 0,
+ .bp_in_en_shift = 17,
+ .bp_in_mask = 0x1ffff,
+ .hfb_filter_cnt = 48,
+ .hfb_filter_size = 128,
+ .qtag_mask = 0x3F,
+ .tbuf_offset = 0x0600,
+ .hfb_offset = 0x8000,
+ .hfb_reg_offset = 0xfc00,
+ .rdma_offset = 0x2000,
+ .tdma_offset = 0x4000,
+ .words_per_bd = 3,
+ .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
+ GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
+ },
+};
+
+/* Infer hardware parameters from the detected GENET version */
+static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
+{
+ struct bcmgenet_hw_params *params;
+ u32 reg;
+ u8 major;
+ u16 gphy_rev;
+
+ if (GENET_IS_V5(priv) || GENET_IS_V4(priv)) {
+ bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
+ genet_dma_ring_regs = genet_dma_ring_regs_v4;
+ } else if (GENET_IS_V3(priv)) {
+ bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
+ genet_dma_ring_regs = genet_dma_ring_regs_v123;
+ } else if (GENET_IS_V2(priv)) {
+ bcmgenet_dma_regs = bcmgenet_dma_regs_v2;
+ genet_dma_ring_regs = genet_dma_ring_regs_v123;
+ } else if (GENET_IS_V1(priv)) {
+ bcmgenet_dma_regs = bcmgenet_dma_regs_v1;
+ genet_dma_ring_regs = genet_dma_ring_regs_v123;
+ }
+
+ /* enum genet_version starts at 1 */
+ priv->hw_params = &bcmgenet_hw_params[priv->version];
+ params = priv->hw_params;
+
+ /* Read GENET HW version */
+ reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL);
+ major = (reg >> 24 & 0x0f);
+ if (major == 6)
+ major = 5;
+ else if (major == 5)
+ major = 4;
+ else if (major == 0)
+ major = 1;
+ if (major != priv->version) {
+ dev_err(&priv->pdev->dev,
+ "GENET version mismatch, got: %d, configured for: %d\n",
+ major, priv->version);
+ }
+
+ /* Print the GENET core version */
+ dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT,
+ major, (reg >> 16) & 0x0f, reg & 0xffff);
+
+ /* Store the integrated PHY revision for the MDIO probing function
+ * to pass this information to the PHY driver. The PHY driver expects
+ * to find the PHY major revision in bits 15:8 while the GENET register
+ * stores that information in bits 7:0, account for that.
+ *
+ * On newer chips, starting with PHY revision G0, a new scheme is
+ * deployed similar to the Starfighter 2 switch with GPHY major
+ * revision in bits 15:8 and patch level in bits 7:0. Major revision 0
+ * is reserved as well as special value 0x01ff, we have a small
+ * heuristic to check for the new GPHY revision and re-arrange things
+ * so the GPHY driver is happy.
+ */
+ gphy_rev = reg & 0xffff;
+
+ if (GENET_IS_V5(priv)) {
+ /* The EPHY revision should come from the MDIO registers of
+ * the PHY not from GENET.
+ */
+ if (gphy_rev != 0) {
+ pr_warn("GENET is reporting EPHY revision: 0x%04x\n",
+ gphy_rev);
+ }
+ /* This is reserved so should require special treatment */
+ } else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
+ pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
+ return;
+ /* This is the good old scheme, just GPHY major, no minor nor patch */
+ } else if ((gphy_rev & 0xf0) != 0) {
+ priv->gphy_rev = gphy_rev << 8;
+ /* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
+ } else if ((gphy_rev & 0xff00) != 0) {
+ priv->gphy_rev = gphy_rev;
+ }
+
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+ if (!(params->flags & GENET_HAS_40BITS))
+ pr_warn("GENET does not support 40-bits PA\n");
+#endif
+
+ pr_debug("Configuration for version: %d\n"
+ "TXq: %1d, TXqBDs: %1d, RXq: %1d, RXqBDs: %1d\n"
+ "BP << en: %2d, BP msk: 0x%05x\n"
+ "HFB count: %2d, QTAQ msk: 0x%05x\n"
+ "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n"
+ "RDMA: 0x%05x, TDMA: 0x%05x\n"
+ "Words/BD: %d\n",
+ priv->version,
+ params->tx_queues, params->tx_bds_per_q,
+ params->rx_queues, params->rx_bds_per_q,
+ params->bp_in_en_shift, params->bp_in_mask,
+ params->hfb_filter_cnt, params->qtag_mask,
+ params->tbuf_offset, params->hfb_offset,
+ params->hfb_reg_offset,
+ params->rdma_offset, params->tdma_offset,
+ params->words_per_bd);
+}
+
+struct bcmgenet_plat_data {
+ enum bcmgenet_version version;
+ u32 dma_max_burst_length;
+ bool ephy_16nm;
+};
+
+static const struct bcmgenet_plat_data v1_plat_data = {
+ .version = GENET_V1,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v2_plat_data = {
+ .version = GENET_V2,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v3_plat_data = {
+ .version = GENET_V3,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v4_plat_data = {
+ .version = GENET_V4,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v5_plat_data = {
+ .version = GENET_V5,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data bcm2711_plat_data = {
+ .version = GENET_V5,
+ .dma_max_burst_length = 0x08,
+};
+
+static const struct bcmgenet_plat_data bcm7712_plat_data = {
+ .version = GENET_V5,
+ .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+ .ephy_16nm = true,
+};
+
+static const struct of_device_id bcmgenet_match[] = {
+ { .compatible = "brcm,genet-v1", .data = &v1_plat_data },
+ { .compatible = "brcm,genet-v2", .data = &v2_plat_data },
+ { .compatible = "brcm,genet-v3", .data = &v3_plat_data },
+ { .compatible = "brcm,genet-v4", .data = &v4_plat_data },
+ { .compatible = "brcm,genet-v5", .data = &v5_plat_data },
+ { .compatible = "brcm,bcm2711-genet-v5", .data = &bcm2711_plat_data },
+ { .compatible = "brcm,bcm7712-genet-v5", .data = &bcm7712_plat_data },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bcmgenet_match);
+
+static int bcmgenet_probe(struct platform_device *pdev)
+{
+ struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
+ const struct bcmgenet_plat_data *pdata;
+ struct bcmgenet_priv *priv;
+ struct net_device *dev;
+ unsigned int i;
+ int err = -EIO;
+
+ /* Up to GENET_MAX_MQ_CNT + 1 TX queues and RX queues */
+ dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1,
+ GENET_MAX_MQ_CNT + 1);
+ if (!dev) {
+ dev_err(&pdev->dev, "can't allocate net device\n");
+ return -ENOMEM;
+ }
+
+ priv = netdev_priv(dev);
+ priv->irq0 = platform_get_irq(pdev, 0);
+ if (priv->irq0 < 0) {
+ err = priv->irq0;
+ goto err;
+ }
+ priv->irq1 = platform_get_irq(pdev, 1);
+ if (priv->irq1 < 0) {
+ err = priv->irq1;
+ goto err;
+ }
+ priv->wol_irq = platform_get_irq_optional(pdev, 2);
+ if (priv->wol_irq == -EPROBE_DEFER) {
+ err = priv->wol_irq;
+ goto err;
+ }
+
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base)) {
+ err = PTR_ERR(priv->base);
+ goto err;
+ }
+
+ spin_lock_init(&priv->lock);
+
+ /* Set default pause parameters */
+ priv->autoneg_pause = 1;
+ priv->tx_pause = 1;
+ priv->rx_pause = 1;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ dev_set_drvdata(&pdev->dev, dev);
+ dev->watchdog_timeo = 2 * HZ;
+ dev->ethtool_ops = &bcmgenet_ethtool_ops;
+ dev->netdev_ops = &bcmgenet_netdev_ops;
+
+ priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);
+
+ /* Set default features */
+ dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
+ NETIF_F_RXCSUM;
+ dev->hw_features |= dev->features;
+ dev->vlan_features |= dev->features;
+
+ /* Request the WOL interrupt and advertise suspend if available */
+ priv->wol_irq_disabled = true;
+ if (priv->wol_irq > 0) {
+ err = devm_request_irq(&pdev->dev, priv->wol_irq,
+ bcmgenet_wol_isr, 0, dev->name, priv);
+ if (!err)
+ device_set_wakeup_capable(&pdev->dev, 1);
+ }
+
+ /* Set the needed headroom to account for any possible
+ * features enabling/disabling at runtime
+ */
+ dev->needed_headroom += 64;
+
+ priv->dev = dev;
+ priv->pdev = pdev;
+
+ pdata = device_get_match_data(&pdev->dev);
+ if (pdata) {
+ priv->version = pdata->version;
+ priv->dma_max_burst_length = pdata->dma_max_burst_length;
+ priv->ephy_16nm = pdata->ephy_16nm;
+ } else {
+ priv->version = pd->genet_version;
+ priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH;
+ }
+
+ priv->clk = devm_clk_get_optional(&priv->pdev->dev, "enet");
+ if (IS_ERR(priv->clk)) {
+ dev_dbg(&priv->pdev->dev, "failed to get enet clock\n");
+ err = PTR_ERR(priv->clk);
+ goto err;
+ }
+
+ err = clk_prepare_enable(priv->clk);
+ if (err)
+ goto err;
+
+ bcmgenet_set_hw_params(priv);
+
+ err = -EIO;
+ if (priv->hw_params->flags & GENET_HAS_40BITS)
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
+ if (err)
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ goto err_clk_disable;
+
+ /* Mii wait queue */
+ init_waitqueue_head(&priv->wq);
+ /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
+ priv->rx_buf_len = RX_BUF_LENGTH;
+ INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
+
+ priv->clk_wol = devm_clk_get_optional(&priv->pdev->dev, "enet-wol");
+ if (IS_ERR(priv->clk_wol)) {
+ dev_dbg(&priv->pdev->dev, "failed to get enet-wol clock\n");
+ err = PTR_ERR(priv->clk_wol);
+ goto err_clk_disable;
+ }
+
+ priv->clk_eee = devm_clk_get_optional(&priv->pdev->dev, "enet-eee");
+ if (IS_ERR(priv->clk_eee)) {
+ dev_dbg(&priv->pdev->dev, "failed to get enet-eee clock\n");
+ err = PTR_ERR(priv->clk_eee);
+ goto err_clk_disable;
+ }
+
+ /* If this is an internal GPHY, power it on now, before UniMAC is
+ * brought out of reset as absolutely no UniMAC activity is allowed
+ */
+ if (device_get_phy_mode(&pdev->dev) == PHY_INTERFACE_MODE_INTERNAL)
+ bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
+
+ if (pd && !IS_ERR_OR_NULL(pd->mac_address))
+ eth_hw_addr_set(dev, pd->mac_address);
+ else
+ if (device_get_ethdev_address(&pdev->dev, dev))
+ if (has_acpi_companion(&pdev->dev)) {
+ u8 addr[ETH_ALEN];
+
+ bcmgenet_get_hw_addr(priv, addr);
+ eth_hw_addr_set(dev, addr);
+ }
+
+ if (!is_valid_ether_addr(dev->dev_addr)) {
+ dev_warn(&pdev->dev, "using random Ethernet MAC\n");
+ eth_hw_addr_random(dev);
+ }
+
+ reset_umac(priv);
+
+ err = bcmgenet_mii_init(dev);
+ if (err)
+ goto err_clk_disable;
+
+ /* setup number of real queues + 1 (GENET_V1 has 0 hardware queues
+ * just the ring 16 descriptor based TX
+ */
+ netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1);
+ netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1);
+
+ /* Set default coalescing parameters */
+ for (i = 0; i < priv->hw_params->rx_queues; i++)
+ priv->rx_rings[i].rx_max_coalesced_frames = 1;
+ priv->rx_rings[DESC_INDEX].rx_max_coalesced_frames = 1;
+
+ /* libphy will determine the link state */
+ netif_carrier_off(dev);
+
+ /* Turn off the main clock, WOL clock is handled separately */
+ clk_disable_unprepare(priv->clk);
+
+ err = register_netdev(dev);
+ if (err) {
+ bcmgenet_mii_exit(dev);
+ goto err;
+ }
+
+ return err;
+
+err_clk_disable:
+ clk_disable_unprepare(priv->clk);
+err:
+ free_netdev(dev);
+ return err;
+}
+
+static int bcmgenet_remove(struct platform_device *pdev)
+{
+ struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+ unregister_netdev(priv->dev);
+ bcmgenet_mii_exit(priv->dev);
+ free_netdev(priv->dev);
+
+ return 0;
+}
+
+static void bcmgenet_shutdown(struct platform_device *pdev)
+{
+ bcmgenet_remove(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bcmgenet_resume_noirq(struct device *d)
+{
+ struct net_device *dev = dev_get_drvdata(d);
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int ret;
+ u32 reg;
+
+ if (!netif_running(dev))
+ return 0;
+
+ /* Turn on the clock */
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ return ret;
+
+ if (device_may_wakeup(d) && priv->wolopts) {
+ /* Account for Wake-on-LAN events and clear those events
+ * (Some devices need more time between enabling the clocks
+ * and the interrupt register reflecting the wake event so
+ * read the register twice)
+ */
+ reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
+ reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
+ if (reg & UMAC_IRQ_WAKE_EVENT)
+ pm_wakeup_event(&priv->pdev->dev, 0);
+ }
+
+ bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_WAKE_EVENT, INTRL2_CPU_CLEAR);
+
+ return 0;
+}
+
+static int bcmgenet_resume(struct device *d)
+{
+ struct net_device *dev = dev_get_drvdata(d);
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ struct bcmgenet_rxnfc_rule *rule;
+ unsigned long dma_ctrl;
+ int ret;
+
+ if (!netif_running(dev))
+ return 0;
+
+ /* From WOL-enabled suspend, switch to regular clock */
+ if (device_may_wakeup(d) && priv->wolopts)
+ bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
+
+ /* If this is an internal GPHY, power it back on now, before UniMAC is
+ * brought out of reset as absolutely no UniMAC activity is allowed
+ */
+ if (priv->internal_phy)
+ bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
+
+ bcmgenet_umac_reset(priv);
+
+ init_umac(priv);
+
+ phy_init_hw(dev->phydev);
+
+ /* Speed settings must be restored */
+ genphy_config_aneg(dev->phydev);
+ bcmgenet_mii_config(priv->dev, false);
+
+ /* Restore enabled features */
+ bcmgenet_set_features(dev, dev->features);
+
+ bcmgenet_set_hw_addr(priv, dev->dev_addr);
+
+ /* Restore hardware filters */
+ bcmgenet_hfb_clear(priv);
+ list_for_each_entry(rule, &priv->rxnfc_list, list)
+ if (rule->state != BCMGENET_RXNFC_STATE_UNUSED)
+ bcmgenet_hfb_create_rxnfc_filter(priv, rule);
+
+ /* Disable RX/TX DMA and flush TX queues */
+ dma_ctrl = bcmgenet_dma_disable(priv);
+
+ /* Reinitialize TDMA and RDMA and SW housekeeping */
+ ret = bcmgenet_init_dma(priv);
+ if (ret) {
+ netdev_err(dev, "failed to initialize DMA\n");
+ goto out_clk_disable;
+ }
+
+ /* Always enable ring 16 - descriptor ring */
+ bcmgenet_enable_dma(priv, dma_ctrl);
+
+ if (!device_may_wakeup(d))
+ phy_resume(dev->phydev);
+
+ bcmgenet_netif_start(dev);
+
+ netif_device_attach(dev);
+
+ return 0;
+
+out_clk_disable:
+ if (priv->internal_phy)
+ bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
+ clk_disable_unprepare(priv->clk);
+ return ret;
+}
+
+static int bcmgenet_suspend(struct device *d)
+{
+ struct net_device *dev = dev_get_drvdata(d);
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return 0;
+
+ netif_device_detach(dev);
+
+ bcmgenet_netif_stop(dev, true);
+
+ if (!device_may_wakeup(d))
+ phy_suspend(dev->phydev);
+
+ /* Disable filtering */
+ bcmgenet_hfb_reg_writel(priv, 0, HFB_CTRL);
+
+ return 0;
+}
+
+static int bcmgenet_suspend_noirq(struct device *d)
+{
+ struct net_device *dev = dev_get_drvdata(d);
+ struct bcmgenet_priv *priv = netdev_priv(dev);
+ int ret = 0;
+
+ if (!netif_running(dev))
+ return 0;
+
+ /* Prepare the device for Wake-on-LAN and switch to the slow clock */
+ if (device_may_wakeup(d) && priv->wolopts)
+ ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
+ else if (priv->internal_phy)
+ ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
+
+ /* Let the framework handle resumption and leave the clocks on */
+ if (ret)
+ return ret;
+
+ /* Turn off the clocks */
+ clk_disable_unprepare(priv->clk);
+
+ return 0;
+}
+#else
+#define bcmgenet_suspend NULL
+#define bcmgenet_suspend_noirq NULL
+#define bcmgenet_resume NULL
+#define bcmgenet_resume_noirq NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops bcmgenet_pm_ops = {
+ .suspend = bcmgenet_suspend,
+ .suspend_noirq = bcmgenet_suspend_noirq,
+ .resume = bcmgenet_resume,
+ .resume_noirq = bcmgenet_resume_noirq,
+};
+
+static const struct acpi_device_id genet_acpi_match[] = {
+ { "BCM6E4E", (kernel_ulong_t)&bcm2711_plat_data },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, genet_acpi_match);
+
+static struct platform_driver bcmgenet_driver = {
+ .probe = bcmgenet_probe,
+ .remove = bcmgenet_remove,
+ .shutdown = bcmgenet_shutdown,
+ .driver = {
+ .name = "bcmgenet",
+ .of_match_table = bcmgenet_match,
+ .pm = &bcmgenet_pm_ops,
+ .acpi_match_table = genet_acpi_match,
+ },
+};
+module_platform_driver(bcmgenet_driver);
+
+MODULE_AUTHOR("Broadcom Corporation");
+MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver");
+MODULE_ALIAS("platform:bcmgenet");
+MODULE_LICENSE("GPL");
+MODULE_SOFTDEP("pre: mdio-bcm-unimac");