[PATCH 1/5] net: mvberlin_eth: add an Ethernet driver for Marvell Berlin
Antoine Tenart
antoine.tenart at free-electrons.com
Fri Aug 29 06:50:59 PDT 2014
This patch introduces the Marvell Berlin network unit driver, which uses
the MVMDIO interface to communicate to the PHY. This is a fast Ethernet
driver.
This driver is highly based on the mv643xx_eth driver, and reuse some of
its functions. But lots of differences are there:
- They do not have the same registers.
- The mvberlin_eth driver only supports fast Ethernet.
- The rx/tx handling functions logic is different.
- The mv643xx_eth driver supports TSO.
- The mvberlin_eth driver uses a hash table to filter incoming packets.
No packet is dropped during a ping flood (ping -f) and an iperf test
shows:
------------------------------------------------------------
Client connecting to 192.168.0.11, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.20 port 44183 connected with 192.168.0.11 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 113 MBytes 94.8 Mbits/sec
Signed-off-by: Antoine Tenart <antoine.tenart at free-electrons.com>
---
drivers/net/ethernet/marvell/Kconfig | 9 +
drivers/net/ethernet/marvell/Makefile | 1 +
drivers/net/ethernet/marvell/mvberlin_eth.c | 2081 +++++++++++++++++++++++++++
3 files changed, 2091 insertions(+)
create mode 100644 drivers/net/ethernet/marvell/mvberlin_eth.c
diff --git a/drivers/net/ethernet/marvell/Kconfig b/drivers/net/ethernet/marvell/Kconfig
index 1b4fc7c639e6..a4f12257d099 100644
--- a/drivers/net/ethernet/marvell/Kconfig
+++ b/drivers/net/ethernet/marvell/Kconfig
@@ -18,6 +18,15 @@ config NET_VENDOR_MARVELL
if NET_VENDOR_MARVELL
+config MVBERLIN_ETH
+ tristate "Marvell Berlin ethernet support"
+ depends on ARCH_BERLIN && INET
+ select PHYLIB
+ select MVMDIO
+ ---help---
+ This driver supports the ethernet interface of the Marvell
+ Berlin SoCs.
+
config MV643XX_ETH
tristate "Marvell Discovery (643XX) and Orion ethernet support"
depends on (MV64X60 || PPC32 || PLAT_ORION) && INET
diff --git a/drivers/net/ethernet/marvell/Makefile b/drivers/net/ethernet/marvell/Makefile
index f6425bd2884b..a802dba2503e 100644
--- a/drivers/net/ethernet/marvell/Makefile
+++ b/drivers/net/ethernet/marvell/Makefile
@@ -2,6 +2,7 @@
# Makefile for the Marvell device drivers.
#
+obj-$(CONFIG_MVBERLIN_ETH) += mvberlin_eth.o
obj-$(CONFIG_MVMDIO) += mvmdio.o
obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
obj-$(CONFIG_MVNETA) += mvneta.o
diff --git a/drivers/net/ethernet/marvell/mvberlin_eth.c b/drivers/net/ethernet/marvell/mvberlin_eth.c
new file mode 100644
index 000000000000..5f1874b58017
--- /dev/null
+++ b/drivers/net/ethernet/marvell/mvberlin_eth.c
@@ -0,0 +1,2081 @@
+/*
+ * Copyright (C) 2014 Marvell Technology Group Ltd.
+ *
+ * Antoine Tenart <antoine.tenart at free-electrons.com>
+ * Jisheng Zhang <jszhang at marvell.com>
+ *
+ * Based on the driver for Marvell Discovery (MV643XX) and Marvell Orion
+ * ethernet ports
+ * Copyright (C) 2002 Matthew Dharm <mdharm at momenco.com>
+ *
+ * Based on the 64360 driver from:
+ * Copyright (C) 2002 Rabeeh Khoury <rabeeh at galileo.co.il>
+ * Rabeeh Khoury <rabeeh at marvell.com>
+ *
+ * Copyright (C) 2003 PMC-Sierra, Inc.,
+ * written by Manish Lachwani
+ *
+ * Copyright (C) 2003 Ralf Baechle <ralf at linux-mips.org>
+ *
+ * Copyright (C) 2004-2006 MontaVista Software, Inc.
+ * Dale Farnsworth <dale at farnsworth.org>
+ *
+ * Copyright (C) 2004 Steven J. Hill <sjhill1 at rockwellcollins.com>
+ * <sjhill at realitydiluted.com>
+ *
+ * Copyright (C) 2007-2008 Marvell Semiconductor
+ * Lennert Buytenhek <buytenh at marvell.com>
+ *
+ * Copyright (C) 2013 Michael Stapelberg <michael at stapelberg.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/in.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mv643xx_eth.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/udp.h>
+#include <linux/workqueue.h>
+
+static const char mvberlin_eth_driver_name[] = "mvberlin_eth";
+static const char mvberlin_eth_driver_version[] = "1.0";
+
+/* Main per-port registers. These live at offset 0x0400 */
+#define PORT_CONFIG 0x0000
+#define PROMISCUOUS_MODE 0x00000001
+#define BROADCAST_REJECT_MODE 0x00000002
+#define PORT_ENABLE 0x00000080
+#define HASH_SIZE_HALF_K 0x00001000
+#define HASH_FUNCTION_1 0x00002000
+#define HASH_PASS_MODE 0x00004000
+#define PORT_EXT_CONFIG 0x0008
+#define EXT_IGMP 0x00000001
+#define EXT_SPAN 0x00000002
+#define EXT_FC_AN_DISABLE 0x00000400
+#define EXT_FLP_DISABLE 0x00000800
+#define EXT_FC_ENABLE 0x00000c00
+#define EXT_MRU_ALL_MASK 0x0000c000
+#define EXT_MIB_CLEAR 0x00010000
+#define EXT_DSCP_EN 0x00200000
+#define EXT_MAC_RX_2BSTUFF 0x10000000
+#define HASH_TABLE 0x0028
+#define MAC_ADDR_LOW 0x0030
+#define MAC_ADDR_HIGH 0x0038
+#define SDMA_CONFIG 0x0040
+#define BURST_SIZE_8_64BIT 0x00003000
+#define BLM_RX_LE 0x00000040
+#define BLM_TX_LE 0x00000080
+#define SET_MII_SPEED_TO_10 0x00000000
+#define SET_MII_SPEED_TO_100 0x00000001
+#define SET_FULL_DUPLEX_MODE 0x00000002
+#define RX_FRAME_INTERRUPT 0x00000200
+#define PORT_STATUS 0x0018
+#define TX_IN_PROGRESS 0x00000080
+#define PORT_SPEED_MASK 0x00000001
+#define PORT_SPEED_100 0x00000001
+#define PORT_SPEED_10 0x00000000
+#define FLOW_CONTROL_ENABLED 0x00000004
+#define FULL_DUPLEX 0x00000002
+#define LINK_UP 0x00000008
+#define INT_CAUSE 0x0050
+#define INT_TX_0 0x00000004
+#define INT_TX 0x0000000c
+#define INT_TX_END 0x000000c0
+#define INT_TX_END_0 0x00000040
+#define INT_RX 0x000f0000
+#define INT_RX_0 0x00010000
+#define INT_EXT 0x10000000
+#define INT_EXT_LINK_PHY 0x00000010
+#define INT_EXT_TX 0x00000080
+#define INT_MASK 0x0058
+#define RXQ_CURRENT_DESC_PTR(q) (0x00a0 + ((q) << 2))
+#define RXQ_FIRST_DESC_PTR(q) (0x0080 + ((q) << 2))
+#define SDMA_COMMAND 0x0048
+#define RX_ENABLE 0x00000080
+#define RX_ABORT 0x00008000
+#define TX_STOP 0x00010000
+#define TX_START 0x00800000
+#define TXQ_CURRENT_DESC_PTR(q) (0x00e0 + ((1-q) << 2))
+#define ETH_EDSCP2P0L 0x0060
+#define ETH_EDSCP2P0H 0x0064
+#define ETH_EDSCP2P1L 0x0068
+#define ETH_EDSCP2P1H 0x006c
+
+#define MRU_1518 0x00000000
+#define MRU_1536 0x00004000
+#define MRU_2048 0x00008000
+#define MRU_64K 0x0000c000
+
+#define HASH_TABLE_ENTRY_VALID 0x00000001
+#define HASH_TABLE_ENTRY_SKIP 0x00000002
+#define HASH_TABLE_SIZE 0x4000
+
+/* Hash function macroes */
+#define NIBBLE_SWAPPING_16_BIT(x) \
+ (((x & 0xf) << 4) | \
+ ((x & 0xf0) >> 4) | \
+ ((x & 0xf00) << 4) | \
+ ((x & 0xf000) >> 4))
+
+#define NIBBLE_SWAPPING_32_BIT(x) \
+ (((x & 0xf) << 4) | \
+ ((x & 0xf0) >> 4) | \
+ ((x & 0xf00) << 4) | \
+ ((x & 0xf000) >> 4) | \
+ ((x & 0xf0000) << 4) | \
+ ((x & 0xf00000) >> 4) | \
+ ((x & 0xf000000) << 4) | \
+ ((x & 0xf0000000) >> 4))
+
+#define GT_NIBBLE(x) \
+ (((x & 0x1) << 3) + \
+ ((x & 0x2) << 1) + \
+ ((x & 0x4) >> 1) + \
+ ((x & 0x8) >> 3))
+
+/* Misc per-port registers */
+#define MIB_COUNTERS(p) (0x0500 + ((p) << 7))
+
+/* SDMA configuration register default value */
+#if defined(__BIG_ENDIAN)
+#define PORT_SDMA_CONFIG_DEFAULT_VALUE \
+ (BURST_SIZE_8_64BIT | \
+ 0x3c | \
+ RX_FRAME_INTERRUPT)
+#elif defined(__LITTLE_ENDIAN)
+#define PORT_SDMA_CONFIG_DEFAULT_VALUE \
+ (BURST_SIZE_8_64BIT | \
+ BLM_RX_LE | \
+ BLM_TX_LE | \
+ 0x3c | \
+ RX_FRAME_INTERRUPT)
+#else
+#error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
+#endif
+
+/* Misc definitions */
+#define DEFAULT_RX_QUEUE_SIZE 128
+#define DEFAULT_TX_QUEUE_SIZE 512
+#define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
+
+/* RX/TX descriptors */
+#if defined(__BIG_ENDIAN)
+struct rx_desc {
+ u16 buf_size; /* Buffer size */
+ u16 byte_cnt; /* Descriptor buffer byte count */
+ u32 cmd_sts; /* Command/status field */
+ u32 next_desc_ptr; /* Next descriptor pointer */
+ u32 buf_ptr; /* Descriptor buffer pointer */
+};
+
+struct tx_desc {
+ u16 byte_cnt; /* buffer byte count */
+ u16 l4i_chk; /* CPU provided TCP checksum */
+ u32 cmd_sts; /* Command/status field */
+ u32 next_desc_ptr; /* Pointer to next descriptor */
+ u32 buf_ptr; /* pointer to buffer for this descriptor*/
+};
+#elif defined(__LITTLE_ENDIAN)
+struct rx_desc {
+ u32 cmd_sts; /* Descriptor command status */
+ u16 byte_cnt; /* Descriptor buffer byte count */
+ u16 buf_size; /* Buffer size */
+ u32 buf_ptr; /* Descriptor buffer pointer */
+ u32 next_desc_ptr; /* Next descriptor pointer */
+};
+
+struct tx_desc {
+ u32 cmd_sts; /* Command/status field */
+ u16 l4i_chk; /* CPU provided TCP checksum */
+ u16 byte_cnt; /* buffer byte count */
+ u32 buf_ptr; /* pointer to buffer for this descriptor*/
+ u32 next_desc_ptr; /* Pointer to next descriptor */
+};
+#else
+#error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
+#endif
+
+/* RX & TX descriptor command */
+#define BUFFER_OWNED_BY_DMA 0x80000000
+
+/* RX & TX descriptor status */
+#define ERROR_SUMMARY 0x00008000
+
+/* RX descriptor status */
+#define RX_ENABLE_INTERRUPT 0x00800000
+#define RX_FIRST_DESC 0x00020000
+#define RX_LAST_DESC 0x00010000
+
+/* TX descriptor command */
+#define TX_ENABLE_INTERRUPT 0x00800000
+#define GEN_CRC 0x00400000
+#define TX_FIRST_DESC 0x00020000
+#define TX_LAST_DESC 0x00010000
+#define ZERO_PADDING 0x00040000
+
+/* global *******************************************************************/
+struct mvberlin_eth_shared_private {
+ /* Ethernet controller base address */
+ void __iomem *base;
+
+ /* Per-port MBUS window access register value */
+ u32 win_protect;
+
+ /* Hardware-specific parameters */
+ int extended_rx_coal_limit;
+ int tx_bw_control;
+ int tx_csum_limit;
+ struct clk *clk;
+};
+
+static int mvberlin_eth_open(struct net_device *dev);
+static int mvberlin_eth_stop(struct net_device *dev);
+
+/* per-port *****************************************************************/
+struct rx_queue {
+ int index;
+
+ int rx_ring_size;
+
+ int rx_desc_count;
+ int rx_curr_desc;
+ int rx_used_desc;
+
+ struct rx_desc *rx_desc_area;
+ dma_addr_t rx_desc_dma;
+ int rx_desc_area_size;
+ struct sk_buff **rx_skb;
+};
+
+struct tx_queue {
+ int index;
+
+ int tx_ring_size;
+
+ int tx_desc_count;
+ int tx_curr_desc;
+ int tx_used_desc;
+
+ int tx_stop_threshold;
+ int tx_wake_threshold;
+
+ struct tx_desc *tx_desc_area;
+ dma_addr_t tx_desc_dma;
+ int tx_desc_area_size;
+
+ struct sk_buff_head tx_skb;
+
+ unsigned long tx_packets;
+ unsigned long tx_bytes;
+ unsigned long tx_dropped;
+};
+
+struct mvberlin_eth_private {
+ struct mvberlin_eth_shared_private *shared;
+ void __iomem *base;
+ int port_num;
+
+ struct net_device *dev;
+
+ struct phy_device *phy;
+
+ struct work_struct tx_timeout_task;
+
+ struct napi_struct napi;
+ u32 int_mask;
+ u8 oom;
+ u8 work_rx_refill;
+
+ int skb_size;
+
+ /* RX state */
+ int rx_ring_size;
+ unsigned long rx_desc_sram_addr;
+ int rx_desc_sram_size;
+ int rxq_count;
+ struct timer_list rx_oom;
+ struct rx_queue rxq[8];
+
+ /* TX state */
+ int tx_ring_size;
+ unsigned long tx_desc_sram_addr;
+ int tx_desc_sram_size;
+ int txq_count;
+ struct tx_queue txq[8];
+
+ /* Hardware-specific parameters */
+ struct clk *clk;
+ unsigned int t_clk;
+ void *hash_tbl;
+ dma_addr_t hash_dma;
+};
+
+/* port register accessors **************************************************/
+static inline u32 rdl(struct mvberlin_eth_private *mp, int offset)
+{
+ return readl(mp->shared->base + offset);
+}
+
+static inline u32 rdlp(struct mvberlin_eth_private *mp, int offset)
+{
+ return readl(mp->base + offset);
+}
+
+static inline void wrl(struct mvberlin_eth_private *mp, int offset, u32 data)
+{
+ writel(data, mp->shared->base + offset);
+}
+
+static inline void wrlp(struct mvberlin_eth_private *mp, int offset, u32 data)
+{
+ writel(data, mp->base + offset);
+}
+
+/* rxq/txq helper functions *************************************************/
+static struct mvberlin_eth_private *rxq_to_mp(struct rx_queue *rxq)
+{
+ return container_of(rxq, struct mvberlin_eth_private, rxq[rxq->index]);
+}
+
+static struct mvberlin_eth_private *txq_to_mp(struct tx_queue *txq)
+{
+ return container_of(txq, struct mvberlin_eth_private, txq[txq->index]);
+}
+
+static void rxq_enable(struct rx_queue *rxq)
+{
+ struct mvberlin_eth_private *mp = rxq_to_mp(rxq);
+
+ wrlp(mp, SDMA_COMMAND, RX_ENABLE);
+}
+
+static void rxq_disable(struct rx_queue *rxq)
+{
+ struct mvberlin_eth_private *mp = rxq_to_mp(rxq);
+
+ wrlp(mp, SDMA_COMMAND, RX_ABORT);
+ while (rdlp(mp, SDMA_COMMAND) & RX_ABORT)
+ udelay(10);
+}
+
+static void txq_reset_hw_ptr(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ u32 addr;
+
+ addr = (u32)txq->tx_desc_dma;
+ addr += txq->tx_curr_desc * sizeof(struct tx_desc);
+ wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
+}
+
+static void txq_enable(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+
+ wrlp(mp, SDMA_COMMAND, TX_START);
+}
+
+static void txq_disable(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+
+ wrlp(mp, SDMA_COMMAND, TX_STOP);
+}
+
+static void txq_maybe_wake(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
+
+ if (netif_tx_queue_stopped(nq)) {
+ __netif_tx_lock(nq, smp_processor_id());
+ if (txq->tx_desc_count <= txq->tx_wake_threshold)
+ netif_tx_wake_queue(nq);
+ __netif_tx_unlock(nq);
+ }
+}
+
+static int rxq_process(struct rx_queue *rxq, int budget)
+{
+ struct mvberlin_eth_private *mp = rxq_to_mp(rxq);
+ struct net_device_stats *stats = &mp->dev->stats;
+ int rx;
+
+ rx = 0;
+ while (rx < budget && rxq->rx_desc_count) {
+ struct rx_desc *rx_desc;
+ unsigned int cmd_sts;
+ struct sk_buff *skb;
+ u16 byte_cnt;
+
+ rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
+
+ cmd_sts = rx_desc->cmd_sts;
+ if (cmd_sts & BUFFER_OWNED_BY_DMA)
+ break;
+ rmb();
+
+ skb = rxq->rx_skb[rxq->rx_curr_desc];
+ rxq->rx_skb[rxq->rx_curr_desc] = NULL;
+
+ rxq->rx_curr_desc++;
+ if (rxq->rx_curr_desc == rxq->rx_ring_size)
+ rxq->rx_curr_desc = 0;
+
+ dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
+ rx_desc->buf_size, DMA_FROM_DEVICE);
+ rxq->rx_desc_count--;
+ rx++;
+
+ mp->work_rx_refill |= 1 << rxq->index;
+
+ byte_cnt = rx_desc->byte_cnt;
+
+ /* Update statistics.
+ *
+ * Note that the descriptor byte count includes 2 dummy
+ * bytes automatically inserted by the hardware at the
+ * start of the packet (which we don't count), and a 4
+ * byte CRC at the end of the packet (which we do count).
+ */
+ stats->rx_packets++;
+ stats->rx_bytes += byte_cnt - 2;
+
+ /* In case we received a packet without first / last bits
+ * on, or the error summary bit is set, the packet needs
+ * to be dropped.
+ */
+ if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
+ != (RX_FIRST_DESC | RX_LAST_DESC))
+ goto err;
+
+ /* The -4 is for the CRC in the trailer of the
+ * received packet
+ */
+ skb_put(skb, byte_cnt - 2 - 4);
+
+ skb->protocol = eth_type_trans(skb, mp->dev);
+
+ napi_gro_receive(&mp->napi, skb);
+
+ continue;
+
+err:
+ stats->rx_dropped++;
+
+ if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
+ (RX_FIRST_DESC | RX_LAST_DESC)) {
+ if (net_ratelimit())
+ netdev_err(mp->dev,
+ "received packet spanning multiple descriptors\n");
+ }
+
+ if (cmd_sts & ERROR_SUMMARY)
+ stats->rx_errors++;
+
+ dev_kfree_skb(skb);
+ }
+
+ return rx;
+}
+
+static int rxq_refill(struct rx_queue *rxq, int budget)
+{
+ struct mvberlin_eth_private *mp = rxq_to_mp(rxq);
+ int refilled;
+
+ refilled = 0;
+ while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
+ struct sk_buff *skb;
+ int rx;
+ struct rx_desc *rx_desc;
+ int size;
+
+ skb = netdev_alloc_skb(mp->dev, mp->skb_size);
+
+ if (skb == NULL) {
+ mp->oom = 1;
+ goto oom;
+ }
+
+ if (SKB_DMA_REALIGN)
+ skb_reserve(skb, SKB_DMA_REALIGN);
+
+ refilled++;
+ rxq->rx_desc_count++;
+
+ rx = rxq->rx_used_desc++;
+ if (rxq->rx_used_desc == rxq->rx_ring_size)
+ rxq->rx_used_desc = 0;
+
+ rx_desc = rxq->rx_desc_area + rx;
+
+ size = skb_end_pointer(skb) - skb->data;
+ rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
+ skb->data, size,
+ DMA_FROM_DEVICE);
+ rx_desc->buf_size = size;
+ rxq->rx_skb[rx] = skb;
+ wmb();
+ rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
+ wmb();
+
+ /* The hardware automatically prepends 2 bytes of
+ * dummy data to each received packet, so that the
+ * IP header ends up 16-byte aligned.
+ */
+ skb_reserve(skb, 2);
+ }
+
+ if (refilled < budget)
+ mp->work_rx_refill &= ~(1 << rxq->index);
+
+oom:
+ return refilled;
+}
+
+/* tx ***********************************************************************/
+static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
+{
+ int frag;
+
+ for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
+ const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
+
+ if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ int frag;
+
+ for (frag = 0; frag < nr_frags; frag++) {
+ skb_frag_t *this_frag;
+ int tx_index;
+ struct tx_desc *desc;
+ void *addr;
+
+ this_frag = &skb_shinfo(skb)->frags[frag];
+ addr = page_address(this_frag->page.p) + this_frag->page_offset;
+ tx_index = txq->tx_curr_desc++;
+ if (txq->tx_curr_desc == txq->tx_ring_size)
+ txq->tx_curr_desc = 0;
+ desc = &txq->tx_desc_area[tx_index];
+
+ /* The last fragment will generate an interrupt
+ * which will free the skb on TX completion.
+ */
+ if (frag == nr_frags - 1) {
+ desc->cmd_sts = BUFFER_OWNED_BY_DMA |
+ ZERO_PADDING | TX_LAST_DESC |
+ TX_ENABLE_INTERRUPT;
+ } else {
+ desc->cmd_sts = BUFFER_OWNED_BY_DMA;
+ }
+
+ desc->l4i_chk = 0;
+ desc->byte_cnt = skb_frag_size(this_frag);
+ desc->buf_ptr = dma_map_single(mp->dev->dev.parent, addr,
+ desc->byte_cnt, DMA_TO_DEVICE);
+ }
+}
+
+static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ int tx_index;
+ struct tx_desc *desc;
+ u32 cmd_sts;
+ u16 l4i_chk;
+ int length;
+
+ cmd_sts = 0;
+ l4i_chk = 0;
+
+ if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
+ if (net_ratelimit())
+ netdev_err(dev, "tx queue full?!\n");
+ return -EBUSY;
+ }
+
+ cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
+
+ tx_index = txq->tx_curr_desc++;
+ if (txq->tx_curr_desc == txq->tx_ring_size)
+ txq->tx_curr_desc = 0;
+ desc = &txq->tx_desc_area[tx_index];
+
+ if (nr_frags) {
+ txq_submit_frag_skb(txq, skb);
+ length = skb_headlen(skb);
+ } else {
+ cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
+ length = skb->len;
+ }
+
+ desc->l4i_chk = l4i_chk;
+ desc->byte_cnt = length;
+ desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
+ length, DMA_TO_DEVICE);
+
+ __skb_queue_tail(&txq->tx_skb, skb);
+
+ skb_tx_timestamp(skb);
+
+ /* ensure all other descriptors are written before first cmd_sts */
+ wmb();
+ desc->cmd_sts = cmd_sts;
+
+ /* ensure all descriptors are written before poking hardware */
+ wmb();
+ txq_enable(txq);
+
+ txq->tx_desc_count += nr_frags + 1;
+
+ return 0;
+}
+
+static netdev_tx_t mvberlin_eth_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int length, queue;
+ struct tx_queue *txq;
+ struct netdev_queue *nq;
+
+ queue = skb_get_queue_mapping(skb);
+ txq = mp->txq + queue;
+ nq = netdev_get_tx_queue(dev, queue);
+
+ if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
+ netdev_printk(KERN_DEBUG, dev,
+ "failed to linearize skb with tiny unaligned fragment\n");
+ return NETDEV_TX_BUSY;
+ }
+
+ length = skb->len;
+
+ if (!txq_submit_skb(txq, skb, dev)) {
+ txq->tx_bytes += length;
+ txq->tx_packets++;
+
+ if (txq->tx_desc_count >= txq->tx_stop_threshold)
+ netif_tx_stop_queue(nq);
+ } else {
+ txq->tx_dropped++;
+ dev_kfree_skb_any(skb);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/* tx napi ******************************************************************/
+static void txq_kick(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
+ u32 hw_desc_ptr;
+ u32 expected_ptr;
+
+ __netif_tx_lock(nq, smp_processor_id());
+
+ if (rdlp(mp, SDMA_COMMAND) & TX_START)
+ goto out;
+
+ hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
+ expected_ptr = (u32)txq->tx_desc_dma +
+ txq->tx_curr_desc * sizeof(struct tx_desc);
+
+ if (hw_desc_ptr != expected_ptr)
+ txq_enable(txq);
+
+out:
+ __netif_tx_unlock(nq);
+}
+
+static int txq_reclaim(struct tx_queue *txq, int budget, int force)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+ int reclaimed;
+
+ reclaimed = 0;
+ while (reclaimed < budget && txq->tx_desc_count > 0) {
+ int tx_index;
+ struct tx_desc *desc;
+ u32 cmd_sts;
+ struct sk_buff *skb;
+
+ tx_index = txq->tx_used_desc;
+ desc = &txq->tx_desc_area[tx_index];
+ cmd_sts = desc->cmd_sts;
+
+ if (cmd_sts & BUFFER_OWNED_BY_DMA) {
+ if (!force)
+ break;
+ desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
+ }
+
+ txq->tx_used_desc = tx_index + 1;
+ if (txq->tx_used_desc == txq->tx_ring_size)
+ txq->tx_used_desc = 0;
+
+ reclaimed++;
+ txq->tx_desc_count--;
+
+ skb = NULL;
+ if (cmd_sts & TX_LAST_DESC)
+ skb = __skb_dequeue(&txq->tx_skb);
+
+ if (cmd_sts & ERROR_SUMMARY) {
+ netdev_info(mp->dev, "tx error\n");
+ mp->dev->stats.tx_errors++;
+ }
+
+ dev_kfree_skb_irq(skb);
+ }
+
+ return reclaimed;
+}
+
+/* mii management interface *************************************************/
+static void mvberlin_eth_adjust_link(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ u32 pscr = rdlp(mp, PORT_CONFIG);
+ u32 autoneg_disable = HASH_PASS_MODE;
+
+ if (mp->phy->autoneg == AUTONEG_ENABLE) {
+ /* enable auto negotiation */
+ pscr &= ~autoneg_disable;
+ goto out_write;
+ }
+
+ pscr |= autoneg_disable;
+
+ if (mp->phy->speed == SPEED_100)
+ pscr |= SET_MII_SPEED_TO_100;
+ else
+ pscr &= ~SET_MII_SPEED_TO_100;
+
+ if (mp->phy->duplex == DUPLEX_FULL)
+ pscr |= SET_FULL_DUPLEX_MODE;
+ else
+ pscr &= ~SET_FULL_DUPLEX_MODE;
+
+out_write:
+ wrlp(mp, PORT_CONFIG, pscr);
+}
+
+/* statistics ***************************************************************/
+static struct net_device_stats *mvberlin_eth_get_stats(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ struct net_device_stats *stats = &dev->stats;
+ unsigned long tx_packets = 0;
+ unsigned long tx_bytes = 0;
+ unsigned long tx_dropped = 0;
+ int i;
+
+ for (i = 0; i < mp->txq_count; i++) {
+ struct tx_queue *txq = mp->txq + i;
+
+ tx_packets += txq->tx_packets;
+ tx_bytes += txq->tx_bytes;
+ tx_dropped += txq->tx_dropped;
+ }
+
+ stats->tx_packets = tx_packets;
+ stats->tx_bytes = tx_bytes;
+ stats->tx_dropped = tx_dropped;
+
+ return stats;
+}
+
+static inline u32 mib_read(struct mvberlin_eth_private *mp, int offset)
+{
+ return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
+}
+
+/* ethtool ******************************************************************/
+struct mvberlin_eth_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ int sizeof_stat;
+ int netdev_off;
+ int mp_off;
+};
+
+#define SSTAT(m) \
+ { #m, FIELD_SIZEOF(struct net_device_stats, m), \
+ offsetof(struct net_device, stats.m), -1 }
+
+static const struct mvberlin_eth_stats mvberlin_eth_stats[] = {
+ SSTAT(rx_packets),
+ SSTAT(tx_packets),
+ SSTAT(rx_bytes),
+ SSTAT(tx_bytes),
+ SSTAT(rx_errors),
+ SSTAT(tx_errors),
+ SSTAT(rx_dropped),
+ SSTAT(tx_dropped),
+};
+
+static int
+mvberlin_eth_get_settings_phy(struct mvberlin_eth_private *mp,
+ struct ethtool_cmd *cmd)
+{
+ int err;
+
+ err = phy_read_status(mp->phy);
+ if (err == 0)
+ err = phy_ethtool_gset(mp->phy, cmd);
+
+ return err;
+}
+
+static int
+mvberlin_eth_get_settings_phyless(struct mvberlin_eth_private *mp,
+ struct ethtool_cmd *cmd)
+{
+ u32 port_status;
+
+ port_status = rdlp(mp, PORT_STATUS);
+
+ cmd->supported = SUPPORTED_MII;
+ cmd->advertising = ADVERTISED_MII;
+
+ switch (port_status & PORT_SPEED_MASK) {
+ case PORT_SPEED_10:
+ ethtool_cmd_speed_set(cmd, SPEED_10);
+ break;
+ case PORT_SPEED_100:
+ ethtool_cmd_speed_set(cmd, SPEED_100);
+ break;
+ default:
+ cmd->speed = -1;
+ break;
+ }
+
+ cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
+ cmd->port = PORT_MII;
+ cmd->phy_address = 0;
+ cmd->transceiver = XCVR_INTERNAL;
+ cmd->autoneg = AUTONEG_DISABLE;
+ cmd->maxtxpkt = 1;
+ cmd->maxrxpkt = 1;
+
+ return 0;
+}
+
+static void
+mvberlin_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ wol->supported = 0;
+ wol->wolopts = 0;
+ if (mp->phy)
+ phy_ethtool_get_wol(mp->phy, wol);
+}
+
+static int
+mvberlin_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int err;
+
+ if (mp->phy == NULL)
+ return -EOPNOTSUPP;
+
+ err = phy_ethtool_set_wol(mp->phy, wol);
+ /* Given that mvberlin works without the marvell-specific PHY driver,
+ * this debugging hint is useful to have.
+ */
+ if (err == -EOPNOTSUPP)
+ netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n");
+ return err;
+}
+
+static int
+mvberlin_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ if (mp->phy != NULL)
+ return mvberlin_eth_get_settings_phy(mp, cmd);
+
+ return mvberlin_eth_get_settings_phyless(mp, cmd);
+}
+
+static int
+mvberlin_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int ret;
+
+ if (mp->phy == NULL)
+ return -EINVAL;
+
+ ret = phy_ethtool_sset(mp->phy, cmd);
+ if (!ret)
+ mvberlin_eth_adjust_link(dev);
+ return ret;
+}
+
+static void mvberlin_eth_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strlcpy(drvinfo->driver, mvberlin_eth_driver_name,
+ sizeof(drvinfo->driver));
+ strlcpy(drvinfo->version, mvberlin_eth_driver_version,
+ sizeof(drvinfo->version));
+ strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
+ strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
+ drvinfo->n_stats = ARRAY_SIZE(mvberlin_eth_stats);
+}
+
+static int mvberlin_eth_nway_reset(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ if (mp->phy == NULL)
+ return -EINVAL;
+
+ return genphy_restart_aneg(mp->phy);
+}
+
+static void
+mvberlin_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ er->rx_max_pending = 4096;
+ er->tx_max_pending = 4096;
+
+ er->rx_pending = mp->rx_ring_size;
+ er->tx_pending = mp->tx_ring_size;
+}
+
+static int
+mvberlin_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ if (er->rx_mini_pending || er->rx_jumbo_pending)
+ return -EINVAL;
+
+ mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
+ mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
+ if (mp->tx_ring_size != er->tx_pending)
+ netdev_warn(dev, "TX queue size set to %u (requested %u)\n",
+ mp->tx_ring_size, er->tx_pending);
+
+ if (netif_running(dev)) {
+ mvberlin_eth_stop(dev);
+ if (mvberlin_eth_open(dev)) {
+ netdev_err(dev,
+ "fatal error on re-opening device after ring param change\n");
+ return -ENOMEM;
+ }
+ }
+
+ return 0;
+}
+
+static void mvberlin_eth_get_strings(struct net_device *dev,
+ uint32_t stringset, uint8_t *data)
+{
+ int i;
+
+ if (stringset == ETH_SS_STATS) {
+ for (i = 0; i < ARRAY_SIZE(mvberlin_eth_stats); i++) {
+ memcpy(data + i * ETH_GSTRING_LEN,
+ mvberlin_eth_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ }
+ }
+}
+
+static void mvberlin_eth_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats,
+ uint64_t *data)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int i;
+
+ mvberlin_eth_get_stats(dev);
+
+ for (i = 0; i < ARRAY_SIZE(mvberlin_eth_stats); i++) {
+ const struct mvberlin_eth_stats *stat;
+ void *p;
+
+ stat = mvberlin_eth_stats + i;
+
+ if (stat->netdev_off >= 0)
+ p = ((void *)mp->dev) + stat->netdev_off;
+ else
+ p = ((void *)mp) + stat->mp_off;
+
+ data[i] = (stat->sizeof_stat == 8) ?
+ *(uint64_t *)p : *(uint32_t *)p;
+ }
+}
+
+static int mvberlin_eth_get_sset_count(struct net_device *dev, int sset)
+{
+ if (sset == ETH_SS_STATS)
+ return ARRAY_SIZE(mvberlin_eth_stats);
+
+ return -EOPNOTSUPP;
+}
+
+const struct ethtool_ops mvberlin_eth_ethtool_ops = {
+ .get_settings = mvberlin_eth_get_settings,
+ .set_settings = mvberlin_eth_set_settings,
+ .get_drvinfo = mvberlin_eth_get_drvinfo,
+ .nway_reset = mvberlin_eth_nway_reset,
+ .get_link = ethtool_op_get_link,
+ .get_ringparam = mvberlin_eth_get_ringparam,
+ .set_ringparam = mvberlin_eth_set_ringparam,
+ .get_strings = mvberlin_eth_get_strings,
+ .get_ethtool_stats = mvberlin_eth_get_ethtool_stats,
+ .get_sset_count = mvberlin_eth_get_sset_count,
+ .get_ts_info = ethtool_op_get_ts_info,
+ .get_wol = mvberlin_eth_get_wol,
+ .set_wol = mvberlin_eth_set_wol,
+};
+
+/* rx/tx queue initialisation ***********************************************/
+static int rxq_init(struct mvberlin_eth_private *mp, int index)
+{
+ struct rx_queue *rxq = mp->rxq + index;
+ struct rx_desc *rx_desc;
+ int size;
+ int i;
+
+ rxq->index = index;
+
+ rxq->rx_ring_size = mp->rx_ring_size;
+
+ rxq->rx_desc_count = 0;
+ rxq->rx_curr_desc = 0;
+ rxq->rx_used_desc = 0;
+
+ size = rxq->rx_ring_size * sizeof(struct rx_desc);
+
+ if (index == 0 && size <= mp->rx_desc_sram_size) {
+ rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
+ mp->rx_desc_sram_size);
+ rxq->rx_desc_dma = mp->rx_desc_sram_addr;
+ } else {
+ rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
+ size, &rxq->rx_desc_dma,
+ GFP_KERNEL);
+ }
+
+ if (rxq->rx_desc_area == NULL) {
+ netdev_err(mp->dev,
+ "can't allocate rx ring (%d bytes)\n", size);
+ goto out;
+ }
+ memset(rxq->rx_desc_area, 0, size);
+
+ rxq->rx_desc_area_size = size;
+ rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb),
+ GFP_KERNEL);
+ if (rxq->rx_skb == NULL)
+ goto out_free;
+
+ rx_desc = rxq->rx_desc_area;
+ for (i = 0; i < rxq->rx_ring_size; i++) {
+ int nexti;
+
+ nexti = i + 1;
+ if (nexti == rxq->rx_ring_size)
+ nexti = 0;
+
+ rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
+ nexti * sizeof(struct rx_desc);
+ }
+
+ return 0;
+
+out_free:
+ if (index == 0 && size <= mp->rx_desc_sram_size)
+ iounmap(rxq->rx_desc_area);
+ else
+ dma_free_coherent(mp->dev->dev.parent, size,
+ rxq->rx_desc_area,
+ rxq->rx_desc_dma);
+
+out:
+ return -ENOMEM;
+}
+
+static void rxq_deinit(struct rx_queue *rxq)
+{
+ struct mvberlin_eth_private *mp = rxq_to_mp(rxq);
+ int i;
+
+ rxq_disable(rxq);
+
+ for (i = 0; i < rxq->rx_ring_size; i++) {
+ if (rxq->rx_skb[i]) {
+ dev_kfree_skb(rxq->rx_skb[i]);
+ rxq->rx_desc_count--;
+ }
+ }
+
+ if (rxq->rx_desc_count) {
+ netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n",
+ rxq->rx_desc_count);
+ }
+
+ if (rxq->index == 0 &&
+ rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
+ iounmap(rxq->rx_desc_area);
+ else
+ dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
+ rxq->rx_desc_area, rxq->rx_desc_dma);
+
+ kfree(rxq->rx_skb);
+}
+
+static int txq_init(struct mvberlin_eth_private *mp, int index)
+{
+ struct tx_queue *txq = mp->txq + index;
+ struct tx_desc *tx_desc;
+ int size;
+ int i;
+
+ txq->index = index;
+
+ txq->tx_ring_size = mp->tx_ring_size;
+
+ txq->tx_desc_count = 0;
+ txq->tx_curr_desc = 0;
+ txq->tx_used_desc = 0;
+
+ size = txq->tx_ring_size * sizeof(struct tx_desc);
+
+ if (index == 0 && size <= mp->tx_desc_sram_size) {
+ txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
+ mp->tx_desc_sram_size);
+ txq->tx_desc_dma = mp->tx_desc_sram_addr;
+ } else {
+ txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
+ size, &txq->tx_desc_dma,
+ GFP_KERNEL);
+ }
+
+ if (txq->tx_desc_area == NULL) {
+ netdev_err(mp->dev,
+ "can't allocate tx ring (%d bytes)\n", size);
+ return -ENOMEM;
+ }
+ memset(txq->tx_desc_area, 0, size);
+
+ txq->tx_desc_area_size = size;
+
+ tx_desc = txq->tx_desc_area;
+ for (i = 0; i < txq->tx_ring_size; i++) {
+ struct tx_desc *txd = tx_desc + i;
+ int nexti;
+
+ nexti = i + 1;
+ if (nexti == txq->tx_ring_size)
+ nexti = 0;
+
+ txd->cmd_sts = 0;
+ txd->next_desc_ptr = txq->tx_desc_dma +
+ nexti * sizeof(struct tx_desc);
+ }
+
+ skb_queue_head_init(&txq->tx_skb);
+
+ return 0;
+}
+
+static void txq_deinit(struct tx_queue *txq)
+{
+ struct mvberlin_eth_private *mp = txq_to_mp(txq);
+
+ txq_disable(txq);
+ txq_reclaim(txq, txq->tx_ring_size, 1);
+
+ BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
+
+ if (txq->index == 0 &&
+ txq->tx_desc_area_size <= mp->tx_desc_sram_size)
+ iounmap(txq->tx_desc_area);
+ else
+ dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
+ txq->tx_desc_area, txq->tx_desc_dma);
+}
+
+static void handle_link_event(struct mvberlin_eth_private *mp)
+{
+ struct net_device *dev = mp->dev;
+ u32 port_status;
+ int speed;
+ int duplex;
+ int fc;
+
+ port_status = rdlp(mp, PORT_STATUS);
+ if (!(port_status & LINK_UP)) {
+ if (netif_carrier_ok(dev)) {
+ int i;
+
+ netdev_info(dev, "link down\n");
+
+ netif_carrier_off(dev);
+
+ for (i = 0; i < mp->txq_count; i++) {
+ struct tx_queue *txq = mp->txq + i;
+
+ txq_reclaim(txq, txq->tx_ring_size, 1);
+ txq_reset_hw_ptr(txq);
+ }
+ }
+ return;
+ }
+
+ switch (port_status & PORT_SPEED_MASK) {
+ case PORT_SPEED_10:
+ speed = 10;
+ break;
+ case PORT_SPEED_100:
+ speed = 100;
+ break;
+ default:
+ speed = -1;
+ break;
+ }
+
+ duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
+ fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
+
+ netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n",
+ speed, duplex ? "full" : "half", fc ? "en" : "dis");
+
+ if (!netif_carrier_ok(dev))
+ netif_carrier_on(dev);
+}
+
+static irqreturn_t mvberlin_eth_irq(int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *)dev_id;
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ u32 int_cause, txstatus;
+ int i;
+
+ int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
+
+ if (int_cause == 0)
+ return IRQ_NONE;
+ wrlp(mp, INT_CAUSE, ~int_cause);
+
+ if (int_cause & INT_RX) {
+ wrlp(mp, INT_MASK, mp->int_mask & ~INT_RX);
+ napi_schedule(&mp->napi);
+ }
+
+ if (int_cause & INT_EXT)
+ handle_link_event(mp);
+
+ txstatus = int_cause & INT_TX;
+ for (i = 0; i < mp->txq_count; ++i) {
+ if (txstatus & INT_TX_0 << i) {
+ txq_reclaim(mp->txq + i, 16, 0);
+ txq_maybe_wake(mp->txq + i);
+ }
+ }
+
+ txstatus = ((int_cause & INT_TX_END) >> 6) &
+ ~((rdlp(mp, SDMA_COMMAND) >> 16) & 0x3);
+ for (i = 0; i < mp->txq_count; ++i) {
+ if (txstatus & 1 << i)
+ txq_kick(mp->txq + i);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int mvberlin_eth_poll(struct napi_struct *napi, int budget)
+{
+ struct mvberlin_eth_private *mp;
+ int i, work_done;
+
+ mp = container_of(napi, struct mvberlin_eth_private, napi);
+
+ if (unlikely(mp->oom)) {
+ mp->oom = 0;
+ del_timer(&mp->rx_oom);
+ }
+
+ work_done = 0;
+ for (i = mp->rxq_count - 1; work_done < budget && i >= 0; i--) {
+ struct rx_queue *rxq = mp->rxq + i;
+ int work_tbd = budget - work_done;
+
+ work_done += rxq_process(rxq, work_tbd);
+ wrlp(mp, INT_CAUSE, ~(INT_RX_0 << i));
+ if (likely(!mp->oom))
+ if (mp->work_rx_refill & 1 << i)
+ rxq_refill(rxq, work_tbd);
+ }
+
+ if (work_done < budget) {
+ if (mp->oom)
+ mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
+ napi_complete(napi);
+ wrlp(mp, INT_MASK, mp->int_mask);
+ }
+
+ return work_done;
+}
+
+static inline void oom_timer_wrapper(unsigned long data)
+{
+ struct mvberlin_eth_private *mp = (void *)data;
+
+ napi_schedule(&mp->napi);
+}
+
+static inline unsigned int cal_mfl(int size)
+{
+ unsigned int pcxr;
+
+ if (size > 2048)
+ pcxr = MRU_64K;
+ else if (size > 1536)
+ pcxr = MRU_2048;
+ else if (size > 1518)
+ pcxr = MRU_1536;
+ else
+ pcxr = MRU_1518;
+
+ return pcxr;
+}
+
+static void port_start(struct mvberlin_eth_private *mp)
+{
+ u32 pscr, pcxr;
+ int i;
+
+ /* Perform PHY reset, if there is a PHY */
+ if (mp->phy != NULL) {
+ struct ethtool_cmd cmd;
+
+ mvberlin_eth_get_settings(mp->dev, &cmd);
+ phy_init_hw(mp->phy);
+ mvberlin_eth_set_settings(mp->dev, &cmd);
+ phy_start(mp->phy);
+ }
+
+ /* Configure basic link parameters */
+ pcxr = rdlp(mp, PORT_EXT_CONFIG);
+ pcxr &= ~EXT_MRU_ALL_MASK;
+ pcxr |= cal_mfl(mp->skb_size);
+ wrlp(mp, PORT_EXT_CONFIG, pcxr);
+
+ pscr = rdlp(mp, PORT_CONFIG);
+ pscr |= PORT_ENABLE;
+ wrlp(mp, PORT_CONFIG, pscr);
+
+ /* Configure TX path and queues */
+ for (i = 0; i < mp->txq_count; i++) {
+ struct tx_queue *txq = mp->txq + i;
+
+ txq_reset_hw_ptr(txq);
+ }
+
+ /* Enable the receive queues */
+ for (i = 0; i < mp->rxq_count; i++) {
+ struct rx_queue *rxq = mp->rxq + i;
+ u32 addr;
+
+ addr = (u32)rxq->rx_desc_dma;
+ addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
+ wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
+ wrlp(mp, RXQ_FIRST_DESC_PTR(i), addr);
+
+ rxq_enable(rxq);
+ }
+}
+
+static void mvberlin_eth_recalc_skb_size(struct mvberlin_eth_private *mp)
+{
+ int skb_size;
+
+ /* Reserve 2+14 bytes for an ethernet header (the hardware
+ * automatically prepends 2 bytes of dummy data to each
+ * received packet), 16 bytes for up to four VLAN tags, and
+ * 4 bytes for the trailing FCS -- 36 bytes total.
+ */
+ skb_size = mp->dev->mtu + 36;
+
+ /* Make sure that the skb size is a multiple of 8 bytes, as
+ * the lower three bits of the receive descriptor's buffer
+ * size field are ignored by the hardware.
+ */
+ mp->skb_size = (skb_size + 7) & ~7;
+
+ /* If NET_SKB_PAD is smaller than a cache line,
+ * netdev_alloc_skb() will cause skb->data to be misaligned
+ * to a cache line boundary. If this is the case, include
+ * some extra space to allow re-aligning the data area.
+ */
+ mp->skb_size += SKB_DMA_REALIGN;
+}
+
+static int mvberlin_eth_open(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int err;
+ int i;
+
+ wrlp(mp, INT_CAUSE, 0);
+ wrlp(mp, INT_MASK, 0);
+
+ err = request_irq(dev->irq, mvberlin_eth_irq,
+ IRQF_SHARED, dev->name, dev);
+ if (err) {
+ netdev_err(dev, "can't assign irq\n");
+ return -EAGAIN;
+ }
+
+ mvberlin_eth_recalc_skb_size(mp);
+
+ napi_enable(&mp->napi);
+
+ mp->int_mask = INT_EXT;
+
+ for (i = 0; i < mp->rxq_count; i++) {
+ err = rxq_init(mp, i);
+ if (err) {
+ while (--i >= 0)
+ rxq_deinit(mp->rxq + i);
+ goto out;
+ }
+
+ rxq_refill(mp->rxq + i, INT_MAX);
+ mp->int_mask |= INT_RX_0 << i;
+ }
+
+ if (mp->oom) {
+ mp->rx_oom.expires = jiffies + (HZ / 10);
+ add_timer(&mp->rx_oom);
+ }
+
+ for (i = 0; i < mp->txq_count; i++) {
+ err = txq_init(mp, i);
+ if (err) {
+ while (--i >= 0)
+ txq_deinit(mp->txq + i);
+ goto out_free;
+ }
+ mp->int_mask |= INT_TX_0 << i;
+ mp->int_mask |= INT_TX_END_0 << i;
+ }
+
+ port_start(mp);
+
+ wrlp(mp, INT_MASK, mp->int_mask);
+
+ return 0;
+
+out_free:
+ for (i = 0; i < mp->rxq_count; i++)
+ rxq_deinit(mp->rxq + i);
+out:
+ free_irq(dev->irq, dev);
+
+ return err;
+}
+
+static void port_reset(struct mvberlin_eth_private *mp)
+{
+ unsigned int data;
+ int i;
+
+ for (i = 0; i < mp->rxq_count; i++)
+ rxq_disable(mp->rxq + i);
+ for (i = 0; i < mp->txq_count; i++)
+ txq_disable(mp->txq + i);
+
+ /* Reset the Enable bit in the Configuration Register */
+ data = rdlp(mp, PORT_CONFIG);
+ data &= ~(PORT_ENABLE | HASH_PASS_MODE);
+ wrlp(mp, PORT_CONFIG, data);
+}
+
+static int mvberlin_eth_stop(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int i;
+
+ wrlp(mp, INT_MASK, 0x00000000);
+ rdlp(mp, INT_MASK);
+
+ napi_disable(&mp->napi);
+
+ del_timer_sync(&mp->rx_oom);
+
+ netif_carrier_off(dev);
+ if (mp->phy)
+ phy_stop(mp->phy);
+ free_irq(dev->irq, dev);
+
+ port_reset(mp);
+ mvberlin_eth_get_stats(dev);
+
+ for (i = 0; i < mp->rxq_count; i++)
+ rxq_deinit(mp->rxq + i);
+ for (i = 0; i < mp->txq_count; i++)
+ txq_deinit(mp->txq + i);
+
+ return 0;
+}
+
+static int mvberlin_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
+ int cmd)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ int ret;
+
+ if (mp->phy == NULL)
+ return -ENOTSUPP;
+
+ ret = phy_mii_ioctl(mp->phy, ifr, cmd);
+ if (!ret)
+ mvberlin_eth_adjust_link(dev);
+ return ret;
+}
+
+static int mvberlin_eth_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ if (new_mtu < 64 || new_mtu > 9500)
+ return -EINVAL;
+
+ dev->mtu = new_mtu;
+ mvberlin_eth_recalc_skb_size(mp);
+
+ if (!netif_running(dev))
+ return 0;
+
+ /* Stop and then re-open the interface. This will allocate RX
+ * skbs of the new MTU.
+ * There is a possible danger that the open will not succeed,
+ * due to memory being full.
+ */
+ mvberlin_eth_stop(dev);
+ if (mvberlin_eth_open(dev)) {
+ netdev_err(dev,
+ "fatal error on re-opening device after MTU change\n");
+ }
+
+ return 0;
+}
+
+static void tx_timeout_task(struct work_struct *ugly)
+{
+ struct mvberlin_eth_private *mp;
+
+ mp = container_of(ugly, struct mvberlin_eth_private, tx_timeout_task);
+ if (netif_running(mp->dev)) {
+ netif_tx_stop_all_queues(mp->dev);
+ port_reset(mp);
+ port_start(mp);
+ netif_tx_wake_all_queues(mp->dev);
+ }
+}
+
+static void mvberlin_eth_tx_timeout(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ netdev_info(dev, "tx timeout\n");
+
+ schedule_work(&mp->tx_timeout_task);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void mvberlin_eth_netpoll(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+
+ wrlp(mp, INT_MASK, 0x00000000);
+ rdlp(mp, INT_MASK);
+
+ mvberlin_eth_irq(dev->irq, dev);
+
+ wrlp(mp, INT_MASK, mp->int_mask);
+}
+#endif
+
+/* hash_table_function - Hash calculation function */
+static unsigned int hash_table_function(unsigned int mac_h, unsigned int mac_l)
+{
+ unsigned int hash_result;
+ unsigned int addr_h;
+ unsigned int addr_l;
+ unsigned int addr_0;
+ unsigned int addr_1;
+ unsigned int addr_2;
+ unsigned int addr_3;
+ unsigned int addr_h_swapped = 0;
+ unsigned int addr_l_swapped = 0;
+
+ addr_h = NIBBLE_SWAPPING_16_BIT(mac_h);
+ addr_l = NIBBLE_SWAPPING_32_BIT(mac_l);
+
+ addr_h_swapped = GT_NIBBLE(addr_h & 0xf) +
+ ((GT_NIBBLE((addr_h>>4) & 0xf)) << 4) +
+ ((GT_NIBBLE((addr_h>>8) & 0xf)) << 8) +
+ ((GT_NIBBLE((addr_h>>12) & 0xf)) << 12);
+
+ addr_l_swapped = GT_NIBBLE(addr_l & 0xf) +
+ ((GT_NIBBLE((addr_l>>4) & 0xf)) << 4) +
+ ((GT_NIBBLE((addr_l>>8) & 0xf)) << 8) +
+ ((GT_NIBBLE((addr_l>>12) & 0xf)) << 12) +
+ ((GT_NIBBLE((addr_l>>16) & 0xf)) << 16) +
+ ((GT_NIBBLE((addr_l>>20) & 0xf)) << 20) +
+ ((GT_NIBBLE((addr_l>>24) & 0xf)) << 24) +
+ ((GT_NIBBLE((addr_l>>28) & 0xf)) << 28);
+
+ addr_h = addr_h_swapped;
+ addr_l = addr_l_swapped;
+
+ /* hash mode 0 */
+ addr_0 = (addr_l >> 2) & 0x3f;
+ addr_1 = (addr_l & 0x3) | ((addr_l>>8) & 0x7f)<<2;
+ addr_2 = (addr_l >> 15) & 0x1ff;
+ addr_3 = ((addr_l >> 24) & 0xff) | ((addr_h & 0x1) << 8);
+
+ hash_result = (addr_0 << 9) | (addr_1 ^ addr_2 ^ addr_3);
+ hash_result = hash_result & 0x7ff; /* half-k */
+
+ return hash_result;
+}
+
+static void add_del_table_entry(void *ptr, unsigned char *addr,
+ int rd, int skip, int del)
+{
+ unsigned int addr_h, addr_l;
+ unsigned int addr_l_read, addr_h_read;
+ unsigned int mac_h, mac_l, *entry;
+ int i;
+
+ mac_h = (addr[0] << 8) | (addr[1]);
+ mac_l = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | (addr[5]);
+ entry = (unsigned int *)(ptr + (8 * hash_table_function(mac_h, mac_l)));
+
+ addr_l = HASH_TABLE_ENTRY_VALID | (rd<<2) |
+ (((mac_h>>8) & 0xf)<<3) | (((mac_h>>12) & 0xf) << 7) |
+ (((mac_h>>0) & 0xf)<<11) | (((mac_h>>4) & 0xf) << 15) |
+ (((mac_l>>24) & 0xf)<<19) | (((mac_l>>28) & 0xf) << 23) |
+ (((mac_l>>16) & 0xf)<<27) | ((((mac_l>>20) & 0x1) << 31));
+
+ addr_h = ((mac_l>>21) & 0x7) | (((mac_l>>8) & 0xf)<<3) |
+ (((mac_l>>12) & 0xf) << 7) | (((mac_l>>0) & 0xf) << 11) |
+ (((mac_l>>4) & 0xf) << 15);
+
+ if (skip)
+ addr_l |= HASH_TABLE_ENTRY_SKIP;
+
+ /* find a free place */
+ for (i = 0 ; i < 12 ; i++) {
+ addr_l_read = *(entry + (i*2));
+ if (!(addr_l_read & HASH_TABLE_ENTRY_VALID) ||
+ (addr_l_read & HASH_TABLE_ENTRY_SKIP)) {
+ entry = entry + (i*2);
+ break;
+ } else {
+ addr_h_read = *(entry + (i*2) + 1);
+ if (((addr_l_read>>3) & 0x1fffffff) ==
+ ((addr_l>>3) & 0x1fffffff) &&
+ (addr_h_read == addr_h)) {
+ entry = entry + (i*2);
+ break;
+ }
+ }
+ }
+
+ if (i == 12)
+ return;
+
+ /* update address entry */
+ if (del) {
+ *entry = 0;
+ *(entry + 1) = 0;
+ } else {
+ *entry = addr_l;
+ *(entry + 1) = addr_h;
+ }
+}
+
+static void init_hash_table(struct mvberlin_eth_private *mp)
+{
+ u32 epcr;
+
+ epcr = rdlp(mp, PORT_CONFIG);
+ epcr |= HASH_SIZE_HALF_K;
+ epcr &= ~HASH_FUNCTION_1;
+ /* reset HDM to 0: discard addresses not found in hash table */
+ epcr &= ~HASH_PASS_MODE;
+ wrlp(mp, PORT_CONFIG, epcr);
+ mp->hash_tbl = dma_alloc_coherent(mp->dev->dev.parent,
+ HASH_TABLE_SIZE,
+ &mp->hash_dma, GFP_KERNEL);
+ wrlp(mp, HASH_TABLE, mp->hash_dma);
+}
+
+static void mvberlin_eth_set_multicast_list(struct net_device *dev)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ u32 epcr;
+
+ epcr = rdlp(mp, PORT_CONFIG);
+ if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+ epcr |= PROMISCUOUS_MODE;
+ wrlp(mp, PORT_CONFIG, epcr);
+ } else {
+ struct netdev_hw_addr *ha;
+
+ epcr &= ~(PROMISCUOUS_MODE | BROADCAST_REJECT_MODE);
+ wrlp(mp, PORT_CONFIG, epcr);
+
+ memset(mp->hash_tbl, 0, HASH_TABLE_SIZE);
+ add_del_table_entry(mp->hash_tbl, dev->dev_addr, 1, 0, 0);
+ netdev_for_each_mc_addr(ha, dev)
+ add_del_table_entry(mp->hash_tbl, ha->addr, 1, 0, 0);
+ }
+}
+
+static void init_pscr(struct mvberlin_eth_private *mp)
+{
+ u32 pcxr;
+
+ wrlp(mp, PORT_CONFIG, 0);
+ pcxr = EXT_FC_AN_DISABLE | EXT_FLP_DISABLE | EXT_FC_ENABLE |
+ EXT_MAC_RX_2BSTUFF | EXT_IGMP | EXT_SPAN | EXT_DSCP_EN;
+
+ /* Only use HIGH TXQ when only one TXQ, so set all pkts are from HIGH */
+ if (mp->txq_count == 1)
+ pcxr |= (7 << 3);
+
+ wrlp(mp, PORT_EXT_CONFIG, pcxr);
+ wrlp(mp, ETH_EDSCP2P0L, 0xFFFFFFFE);
+ wrlp(mp, ETH_EDSCP2P1L, 0x0);
+ wrlp(mp, ETH_EDSCP2P0H, 0xFFFFFFFF);
+ wrlp(mp, ETH_EDSCP2P1H, 0x0);
+}
+
+static void mib_counters_clear(struct mvberlin_eth_private *mp)
+{
+ int i;
+ u32 data;
+
+ data = rdlp(mp, PORT_EXT_CONFIG);
+ data &= ~EXT_MIB_CLEAR; /* 0 to read-clear */
+ wrlp(mp, PORT_EXT_CONFIG, data);
+ for (i = 0; i < 0x60; i += 4)
+ mib_read(mp, i);
+ data |= EXT_MIB_CLEAR; /* 1 to read-no-effect */
+ wrlp(mp, PORT_EXT_CONFIG, data);
+}
+
+static void uc_addr_get(struct mvberlin_eth_private *mp, unsigned char *addr)
+{
+ unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
+ unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
+
+ addr[0] = (mac_h >> 24) & 0xff;
+ addr[1] = (mac_h >> 16) & 0xff;
+ addr[2] = (mac_h >> 8) & 0xff;
+ addr[3] = mac_h & 0xff;
+ addr[4] = (mac_l >> 8) & 0xff;
+ addr[5] = mac_l & 0xff;
+}
+
+static void uc_addr_set(struct mvberlin_eth_private *mp, unsigned char *addr)
+{
+ wrlp(mp, MAC_ADDR_HIGH,
+ (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
+ wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
+}
+
+static void mvberlin_eth_program_unicast_filter(struct mvberlin_eth_private *mp,
+ unsigned char *old,
+ unsigned char *new)
+{
+ uc_addr_set(mp, new);
+
+ /* delete the old address from the filter table */
+ if (old)
+ add_del_table_entry(mp->hash_tbl, old, 1, 0, 1);
+
+ /* add the new address to filter table */
+ add_del_table_entry(mp->hash_tbl, new, 1, 0, 0);
+}
+
+static int mvberlin_eth_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct mvberlin_eth_private *mp = netdev_priv(dev);
+ struct sockaddr *sa = addr;
+ unsigned char old[ETH_ALEN];
+
+ if (!is_valid_ether_addr(sa->sa_data))
+ return -EINVAL;
+
+ memcpy(old, dev->dev_addr, ETH_ALEN);
+ dev->addr_assign_type &= ~NET_ADDR_RANDOM;
+ memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
+
+ netif_addr_lock_bh(dev);
+ mvberlin_eth_program_unicast_filter(mp, old, dev->dev_addr);
+ netif_addr_unlock_bh(dev);
+
+ return 0;
+}
+
+static void set_params(struct mvberlin_eth_private *mp,
+ struct mv643xx_eth_platform_data *pd)
+{
+ struct net_device *dev = mp->dev;
+
+ if (is_valid_ether_addr(pd->mac_addr))
+ memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
+ else
+ uc_addr_get(mp, dev->dev_addr);
+
+ mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
+ if (pd->rx_queue_size)
+ mp->rx_ring_size = pd->rx_queue_size;
+ mp->rx_desc_sram_addr = pd->rx_sram_addr;
+ mp->rx_desc_sram_size = pd->rx_sram_size;
+
+ mp->rxq_count = pd->rx_queue_count ? : 1;
+
+ mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
+ if (pd->tx_queue_size)
+ mp->tx_ring_size = pd->tx_queue_size;
+
+ mp->tx_desc_sram_addr = pd->tx_sram_addr;
+ mp->tx_desc_sram_size = pd->tx_sram_size;
+
+ mp->txq_count = pd->tx_queue_count ? : 1;
+}
+
+static const struct net_device_ops mvberlin_eth_netdev_ops = {
+ .ndo_open = mvberlin_eth_open,
+ .ndo_stop = mvberlin_eth_stop,
+ .ndo_start_xmit = mvberlin_eth_xmit,
+ .ndo_set_rx_mode = mvberlin_eth_set_multicast_list,
+ .ndo_set_mac_address = mvberlin_eth_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = mvberlin_eth_ioctl,
+ .ndo_change_mtu = mvberlin_eth_change_mtu,
+ .ndo_tx_timeout = mvberlin_eth_tx_timeout,
+ .ndo_get_stats = mvberlin_eth_get_stats,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = mvberlin_eth_netpoll,
+#endif
+};
+
+static int mvberlin_eth_probe(struct platform_device *pdev)
+{
+ struct mv643xx_eth_platform_data *pd;
+ struct mvberlin_eth_private *mp;
+ struct net_device *dev;
+ struct resource *res;
+ int ret;
+
+ dev = alloc_etherdev_mq(sizeof(struct mvberlin_eth_private), 8);
+ if (!dev)
+ return -ENOMEM;
+
+ pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ mp = netdev_priv(dev);
+ platform_set_drvdata(pdev, mp);
+ mp->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOMEM;
+
+ mp->shared = devm_kzalloc(&pdev->dev,
+ sizeof(struct mvberlin_eth_shared_private),
+ GFP_KERNEL);
+ if (!mp->shared)
+ return -ENOMEM;
+
+ mp->shared->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mp->shared->base))
+ return PTR_ERR(mp->shared->base);
+ mp->base = mp->shared->base + 0x400;
+
+ mp->clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(mp->clk)) {
+ clk_prepare_enable(mp->clk);
+ mp->t_clk = clk_get_rate(mp->clk);
+ }
+
+ set_params(mp, pd);
+ netif_set_real_num_tx_queues(dev, mp->txq_count);
+ netif_set_real_num_rx_queues(dev, mp->rxq_count);
+
+ pd->phy_node = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
+ if (!pd->phy_node) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ mp->phy = of_phy_connect(dev, pd->phy_node,
+ mvberlin_eth_adjust_link, 0,
+ PHY_INTERFACE_MODE_RGMII);
+ if (!mp->phy) {
+ ret = -EPROBE_DEFER;
+ goto out;
+ }
+
+ dev->ethtool_ops = &mvberlin_eth_ethtool_ops;
+
+ init_pscr(mp);
+
+ init_hash_table(mp);
+ mvberlin_eth_program_unicast_filter(mp, NULL, dev->dev_addr);
+
+ mib_counters_clear(mp);
+
+ INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
+
+ netif_napi_add(dev, &mp->napi, mvberlin_eth_poll, NAPI_POLL_WEIGHT);
+
+ init_timer(&mp->rx_oom);
+ mp->rx_oom.data = (unsigned long)mp;
+ mp->rx_oom.function = oom_timer_wrapper;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ BUG_ON(!res);
+ dev->irq = res->start;
+
+ dev->netdev_ops = &mvberlin_eth_netdev_ops;
+
+ dev->watchdog_timeo = 2 * HZ;
+ dev->base_addr = 0;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
+
+ ret = register_netdev(dev);
+ if (ret)
+ goto out;
+
+ netif_carrier_off(dev);
+
+ return 0;
+
+out:
+ if (!IS_ERR(mp->clk))
+ clk_disable_unprepare(mp->clk);
+ free_netdev(dev);
+
+ return ret;
+}
+
+static int mvberlin_eth_remove(struct platform_device *pdev)
+{
+ struct mvberlin_eth_private *mp = platform_get_drvdata(pdev);
+
+ unregister_netdev(mp->dev);
+ if (mp->phy != NULL)
+ phy_disconnect(mp->phy);
+ cancel_work_sync(&mp->tx_timeout_task);
+
+ if (!IS_ERR(mp->clk))
+ clk_disable_unprepare(mp->clk);
+
+ free_netdev(mp->dev);
+
+ return 0;
+}
+
+static void mvberlin_eth_shutdown(struct platform_device *pdev)
+{
+ struct mvberlin_eth_private *mp = platform_get_drvdata(pdev);
+
+ /* Mask all interrupts on ethernet port */
+ wrlp(mp, INT_MASK, 0);
+ rdlp(mp, INT_MASK);
+
+ if (netif_running(mp->dev))
+ port_reset(mp);
+}
+
+static const struct of_device_id mvberlin_eth_of_match[] = {
+ { .compatible = "marvell,berlin-eth" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, mvberlin_eth_of_match);
+
+static struct platform_driver mvberlin_eth_driver = {
+ .probe = mvberlin_eth_probe,
+ .remove = mvberlin_eth_remove,
+ .shutdown = mvberlin_eth_shutdown,
+ .driver = {
+ .name = "mvberlin-ethernet",
+ .owner = THIS_MODULE,
+ .of_match_table = mvberlin_eth_of_match,
+ },
+};
+module_platform_driver(mvberlin_eth_driver);
+
+MODULE_AUTHOR("Antoine Tenart <antoine.tenart at free-electrons.com>");
+MODULE_DESCRIPTION("Ethernet driver for Marvell Berlin SoCs");
+MODULE_LICENSE("GPL");
--
1.9.1
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