| /* |
| * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports |
| * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com> |
| * |
| * Based on the 64360 driver from: |
| * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il> |
| * Rabeeh Khoury <rabeeh@marvell.com> |
| * |
| * Copyright (C) 2003 PMC-Sierra, Inc., |
| * written by Manish Lachwani |
| * |
| * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org> |
| * |
| * Copyright (C) 2004-2006 MontaVista Software, Inc. |
| * Dale Farnsworth <dale@farnsworth.org> |
| * |
| * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com> |
| * <sjhill@realitydiluted.com> |
| * |
| * Copyright (C) 2007-2008 Marvell Semiconductor |
| * Lennert Buytenhek <buytenh@marvell.com> |
| * |
| * Copyright (C) 2013 Michael Stapelberg <michael@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/>. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/init.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <net/tso.h> |
| #include <linux/tcp.h> |
| #include <linux/udp.h> |
| #include <linux/etherdevice.h> |
| #include <linux/delay.h> |
| #include <linux/ethtool.h> |
| #include <linux/platform_device.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| #include <linux/phy.h> |
| #include <linux/mv643xx_eth.h> |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/clk.h> |
| #include <linux/of.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_net.h> |
| #include <linux/of_mdio.h> |
| |
| static char mv643xx_eth_driver_name[] = "mv643xx_eth"; |
| static char mv643xx_eth_driver_version[] = "1.4"; |
| |
| |
| /* |
| * Registers shared between all ports. |
| */ |
| #define PHY_ADDR 0x0000 |
| #define WINDOW_BASE(w) (0x0200 + ((w) << 3)) |
| #define WINDOW_SIZE(w) (0x0204 + ((w) << 3)) |
| #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2)) |
| #define WINDOW_BAR_ENABLE 0x0290 |
| #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4)) |
| |
| /* |
| * Main per-port registers. These live at offset 0x0400 for |
| * port #0, 0x0800 for port #1, and 0x0c00 for port #2. |
| */ |
| #define PORT_CONFIG 0x0000 |
| #define UNICAST_PROMISCUOUS_MODE 0x00000001 |
| #define PORT_CONFIG_EXT 0x0004 |
| #define MAC_ADDR_LOW 0x0014 |
| #define MAC_ADDR_HIGH 0x0018 |
| #define SDMA_CONFIG 0x001c |
| #define TX_BURST_SIZE_16_64BIT 0x01000000 |
| #define TX_BURST_SIZE_4_64BIT 0x00800000 |
| #define BLM_TX_NO_SWAP 0x00000020 |
| #define BLM_RX_NO_SWAP 0x00000010 |
| #define RX_BURST_SIZE_16_64BIT 0x00000008 |
| #define RX_BURST_SIZE_4_64BIT 0x00000004 |
| #define PORT_SERIAL_CONTROL 0x003c |
| #define SET_MII_SPEED_TO_100 0x01000000 |
| #define SET_GMII_SPEED_TO_1000 0x00800000 |
| #define SET_FULL_DUPLEX_MODE 0x00200000 |
| #define MAX_RX_PACKET_9700BYTE 0x000a0000 |
| #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000 |
| #define DO_NOT_FORCE_LINK_FAIL 0x00000400 |
| #define SERIAL_PORT_CONTROL_RESERVED 0x00000200 |
| #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008 |
| #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004 |
| #define FORCE_LINK_PASS 0x00000002 |
| #define SERIAL_PORT_ENABLE 0x00000001 |
| #define PORT_STATUS 0x0044 |
| #define TX_FIFO_EMPTY 0x00000400 |
| #define TX_IN_PROGRESS 0x00000080 |
| #define PORT_SPEED_MASK 0x00000030 |
| #define PORT_SPEED_1000 0x00000010 |
| #define PORT_SPEED_100 0x00000020 |
| #define PORT_SPEED_10 0x00000000 |
| #define FLOW_CONTROL_ENABLED 0x00000008 |
| #define FULL_DUPLEX 0x00000004 |
| #define LINK_UP 0x00000002 |
| #define TXQ_COMMAND 0x0048 |
| #define TXQ_FIX_PRIO_CONF 0x004c |
| #define PORT_SERIAL_CONTROL1 0x004c |
| #define CLK125_BYPASS_EN 0x00000010 |
| #define TX_BW_RATE 0x0050 |
| #define TX_BW_MTU 0x0058 |
| #define TX_BW_BURST 0x005c |
| #define INT_CAUSE 0x0060 |
| #define INT_TX_END 0x07f80000 |
| #define INT_TX_END_0 0x00080000 |
| #define INT_RX 0x000003fc |
| #define INT_RX_0 0x00000004 |
| #define INT_EXT 0x00000002 |
| #define INT_CAUSE_EXT 0x0064 |
| #define INT_EXT_LINK_PHY 0x00110000 |
| #define INT_EXT_TX 0x000000ff |
| #define INT_MASK 0x0068 |
| #define INT_MASK_EXT 0x006c |
| #define TX_FIFO_URGENT_THRESHOLD 0x0074 |
| #define RX_DISCARD_FRAME_CNT 0x0084 |
| #define RX_OVERRUN_FRAME_CNT 0x0088 |
| #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc |
| #define TX_BW_RATE_MOVED 0x00e0 |
| #define TX_BW_MTU_MOVED 0x00e8 |
| #define TX_BW_BURST_MOVED 0x00ec |
| #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4)) |
| #define RXQ_COMMAND 0x0280 |
| #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2)) |
| #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4)) |
| #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4)) |
| #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4)) |
| |
| /* |
| * Misc per-port registers. |
| */ |
| #define MIB_COUNTERS(p) (0x1000 + ((p) << 7)) |
| #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10)) |
| #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10)) |
| #define UNICAST_TABLE(p) (0x1600 + ((p) << 10)) |
| |
| |
| /* |
| * SDMA configuration register default value. |
| */ |
| #if defined(__BIG_ENDIAN) |
| #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ |
| (RX_BURST_SIZE_4_64BIT | \ |
| TX_BURST_SIZE_4_64BIT) |
| #elif defined(__LITTLE_ENDIAN) |
| #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ |
| (RX_BURST_SIZE_4_64BIT | \ |
| BLM_RX_NO_SWAP | \ |
| BLM_TX_NO_SWAP | \ |
| TX_BURST_SIZE_4_64BIT) |
| #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) |
| |
| #define TSO_HEADER_SIZE 128 |
| |
| /* |
| * RX/TX descriptors. |
| */ |
| #if defined(__BIG_ENDIAN) |
| struct rx_desc { |
| u16 byte_cnt; /* Descriptor buffer byte count */ |
| u16 buf_size; /* Buffer size */ |
| u32 cmd_sts; /* Descriptor command status */ |
| 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 buf_size; /* Buffer size */ |
| u16 byte_cnt; /* Descriptor buffer byte count */ |
| 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 0x00000001 |
| |
| /* RX descriptor status */ |
| #define LAYER_4_CHECKSUM_OK 0x40000000 |
| #define RX_ENABLE_INTERRUPT 0x20000000 |
| #define RX_FIRST_DESC 0x08000000 |
| #define RX_LAST_DESC 0x04000000 |
| #define RX_IP_HDR_OK 0x02000000 |
| #define RX_PKT_IS_IPV4 0x01000000 |
| #define RX_PKT_IS_ETHERNETV2 0x00800000 |
| #define RX_PKT_LAYER4_TYPE_MASK 0x00600000 |
| #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000 |
| #define RX_PKT_IS_VLAN_TAGGED 0x00080000 |
| |
| /* TX descriptor command */ |
| #define TX_ENABLE_INTERRUPT 0x00800000 |
| #define GEN_CRC 0x00400000 |
| #define TX_FIRST_DESC 0x00200000 |
| #define TX_LAST_DESC 0x00100000 |
| #define ZERO_PADDING 0x00080000 |
| #define GEN_IP_V4_CHECKSUM 0x00040000 |
| #define GEN_TCP_UDP_CHECKSUM 0x00020000 |
| #define UDP_FRAME 0x00010000 |
| #define MAC_HDR_EXTRA_4_BYTES 0x00008000 |
| #define GEN_TCP_UDP_CHK_FULL 0x00000400 |
| #define MAC_HDR_EXTRA_8_BYTES 0x00000200 |
| |
| #define TX_IHL_SHIFT 11 |
| |
| |
| /* global *******************************************************************/ |
| struct mv643xx_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; |
| }; |
| |
| #define TX_BW_CONTROL_ABSENT 0 |
| #define TX_BW_CONTROL_OLD_LAYOUT 1 |
| #define TX_BW_CONTROL_NEW_LAYOUT 2 |
| |
| static int mv643xx_eth_open(struct net_device *dev); |
| static int mv643xx_eth_stop(struct net_device *dev); |
| |
| |
| /* per-port *****************************************************************/ |
| struct mib_counters { |
| u64 good_octets_received; |
| u32 bad_octets_received; |
| u32 internal_mac_transmit_err; |
| u32 good_frames_received; |
| u32 bad_frames_received; |
| u32 broadcast_frames_received; |
| u32 multicast_frames_received; |
| u32 frames_64_octets; |
| u32 frames_65_to_127_octets; |
| u32 frames_128_to_255_octets; |
| u32 frames_256_to_511_octets; |
| u32 frames_512_to_1023_octets; |
| u32 frames_1024_to_max_octets; |
| u64 good_octets_sent; |
| u32 good_frames_sent; |
| u32 excessive_collision; |
| u32 multicast_frames_sent; |
| u32 broadcast_frames_sent; |
| u32 unrec_mac_control_received; |
| u32 fc_sent; |
| u32 good_fc_received; |
| u32 bad_fc_received; |
| u32 undersize_received; |
| u32 fragments_received; |
| u32 oversize_received; |
| u32 jabber_received; |
| u32 mac_receive_error; |
| u32 bad_crc_event; |
| u32 collision; |
| u32 late_collision; |
| /* Non MIB hardware counters */ |
| u32 rx_discard; |
| u32 rx_overrun; |
| }; |
| |
| 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; |
| |
| char *tso_hdrs; |
| dma_addr_t tso_hdrs_dma; |
| |
| 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 mv643xx_eth_private { |
| struct mv643xx_eth_shared_private *shared; |
| void __iomem *base; |
| int port_num; |
| |
| struct net_device *dev; |
| |
| struct phy_device *phy; |
| |
| struct timer_list mib_counters_timer; |
| spinlock_t mib_counters_lock; |
| struct mib_counters mib_counters; |
| |
| struct work_struct tx_timeout_task; |
| |
| struct napi_struct napi; |
| u32 int_mask; |
| u8 oom; |
| u8 work_link; |
| u8 work_tx; |
| u8 work_tx_end; |
| u8 work_rx; |
| 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; |
| }; |
| |
| |
| /* port register accessors **************************************************/ |
| static inline u32 rdl(struct mv643xx_eth_private *mp, int offset) |
| { |
| return readl(mp->shared->base + offset); |
| } |
| |
| static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset) |
| { |
| return readl(mp->base + offset); |
| } |
| |
| static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data) |
| { |
| writel(data, mp->shared->base + offset); |
| } |
| |
| static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data) |
| { |
| writel(data, mp->base + offset); |
| } |
| |
| |
| /* rxq/txq helper functions *************************************************/ |
| static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) |
| { |
| return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]); |
| } |
| |
| static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) |
| { |
| return container_of(txq, struct mv643xx_eth_private, txq[txq->index]); |
| } |
| |
| static void rxq_enable(struct rx_queue *rxq) |
| { |
| struct mv643xx_eth_private *mp = rxq_to_mp(rxq); |
| wrlp(mp, RXQ_COMMAND, 1 << rxq->index); |
| } |
| |
| static void rxq_disable(struct rx_queue *rxq) |
| { |
| struct mv643xx_eth_private *mp = rxq_to_mp(rxq); |
| u8 mask = 1 << rxq->index; |
| |
| wrlp(mp, RXQ_COMMAND, mask << 8); |
| while (rdlp(mp, RXQ_COMMAND) & mask) |
| udelay(10); |
| } |
| |
| static void txq_reset_hw_ptr(struct tx_queue *txq) |
| { |
| struct mv643xx_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 mv643xx_eth_private *mp = txq_to_mp(txq); |
| wrlp(mp, TXQ_COMMAND, 1 << txq->index); |
| } |
| |
| static void txq_disable(struct tx_queue *txq) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| u8 mask = 1 << txq->index; |
| |
| wrlp(mp, TXQ_COMMAND, mask << 8); |
| while (rdlp(mp, TXQ_COMMAND) & mask) |
| udelay(10); |
| } |
| |
| static void txq_maybe_wake(struct tx_queue *txq) |
| { |
| struct mv643xx_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_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1) |
| netif_tx_wake_queue(nq); |
| __netif_tx_unlock(nq); |
| } |
| } |
| |
| static int rxq_process(struct rx_queue *rxq, int budget) |
| { |
| struct mv643xx_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); |
| |
| if (cmd_sts & LAYER_4_CHECKSUM_OK) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 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); |
| } |
| |
| if (rx < budget) |
| mp->work_rx &= ~(1 << rxq->index); |
| |
| return rx; |
| } |
| |
| static int rxq_refill(struct rx_queue *rxq, int budget) |
| { |
| struct mv643xx_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 inline __be16 sum16_as_be(__sum16 sum) |
| { |
| return (__force __be16)sum; |
| } |
| |
| static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb, |
| u16 *l4i_chk, u32 *command, int length) |
| { |
| int ret; |
| u32 cmd = 0; |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| int hdr_len; |
| int tag_bytes; |
| |
| BUG_ON(skb->protocol != htons(ETH_P_IP) && |
| skb->protocol != htons(ETH_P_8021Q)); |
| |
| hdr_len = (void *)ip_hdr(skb) - (void *)skb->data; |
| tag_bytes = hdr_len - ETH_HLEN; |
| |
| if (length - hdr_len > mp->shared->tx_csum_limit || |
| unlikely(tag_bytes & ~12)) { |
| ret = skb_checksum_help(skb); |
| if (!ret) |
| goto no_csum; |
| return ret; |
| } |
| |
| if (tag_bytes & 4) |
| cmd |= MAC_HDR_EXTRA_4_BYTES; |
| if (tag_bytes & 8) |
| cmd |= MAC_HDR_EXTRA_8_BYTES; |
| |
| cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL | |
| GEN_IP_V4_CHECKSUM | |
| ip_hdr(skb)->ihl << TX_IHL_SHIFT; |
| |
| /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL |
| * it seems we don't need to pass the initial checksum. */ |
| switch (ip_hdr(skb)->protocol) { |
| case IPPROTO_UDP: |
| cmd |= UDP_FRAME; |
| *l4i_chk = 0; |
| break; |
| case IPPROTO_TCP: |
| *l4i_chk = 0; |
| break; |
| default: |
| WARN(1, "protocol not supported"); |
| } |
| } else { |
| no_csum: |
| /* Errata BTS #50, IHL must be 5 if no HW checksum */ |
| cmd |= 5 << TX_IHL_SHIFT; |
| } |
| *command = cmd; |
| return 0; |
| } |
| |
| static inline int |
| txq_put_data_tso(struct net_device *dev, struct tx_queue *txq, |
| struct sk_buff *skb, char *data, int length, |
| bool last_tcp, bool is_last) |
| { |
| int tx_index; |
| u32 cmd_sts; |
| struct tx_desc *desc; |
| |
| 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]; |
| |
| desc->l4i_chk = 0; |
| desc->byte_cnt = length; |
| desc->buf_ptr = dma_map_single(dev->dev.parent, data, |
| length, DMA_TO_DEVICE); |
| if (unlikely(dma_mapping_error(dev->dev.parent, desc->buf_ptr))) { |
| WARN(1, "dma_map_single failed!\n"); |
| return -ENOMEM; |
| } |
| |
| cmd_sts = BUFFER_OWNED_BY_DMA; |
| if (last_tcp) { |
| /* last descriptor in the TCP packet */ |
| cmd_sts |= ZERO_PADDING | TX_LAST_DESC; |
| /* last descriptor in SKB */ |
| if (is_last) |
| cmd_sts |= TX_ENABLE_INTERRUPT; |
| } |
| desc->cmd_sts = cmd_sts; |
| return 0; |
| } |
| |
| static inline void |
| txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| int tx_index; |
| struct tx_desc *desc; |
| int ret; |
| u32 cmd_csum = 0; |
| u16 l4i_chk = 0; |
| |
| tx_index = txq->tx_curr_desc; |
| desc = &txq->tx_desc_area[tx_index]; |
| |
| ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_csum, length); |
| if (ret) |
| WARN(1, "failed to prepare checksum!"); |
| |
| /* Should we set this? Can't use the value from skb_tx_csum() |
| * as it's not the correct initial L4 checksum to use. */ |
| desc->l4i_chk = 0; |
| |
| desc->byte_cnt = hdr_len; |
| desc->buf_ptr = txq->tso_hdrs_dma + |
| txq->tx_curr_desc * TSO_HEADER_SIZE; |
| desc->cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC | |
| GEN_CRC; |
| |
| txq->tx_curr_desc++; |
| if (txq->tx_curr_desc == txq->tx_ring_size) |
| txq->tx_curr_desc = 0; |
| } |
| |
| static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| int total_len, data_left, ret; |
| int desc_count = 0; |
| struct tso_t tso; |
| int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| |
| /* Count needed descriptors */ |
| if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) { |
| netdev_dbg(dev, "not enough descriptors for TSO!\n"); |
| return -EBUSY; |
| } |
| |
| /* Initialize the TSO handler, and prepare the first payload */ |
| tso_start(skb, &tso); |
| |
| total_len = skb->len - hdr_len; |
| while (total_len > 0) { |
| char *hdr; |
| |
| data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); |
| total_len -= data_left; |
| desc_count++; |
| |
| /* prepare packet headers: MAC + IP + TCP */ |
| hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE; |
| tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); |
| txq_put_hdr_tso(skb, txq, data_left); |
| |
| while (data_left > 0) { |
| int size; |
| desc_count++; |
| |
| size = min_t(int, tso.size, data_left); |
| ret = txq_put_data_tso(dev, txq, skb, tso.data, size, |
| size == data_left, |
| total_len == 0); |
| if (ret) |
| goto err_release; |
| data_left -= size; |
| tso_build_data(skb, &tso, size); |
| } |
| } |
| |
| __skb_queue_tail(&txq->tx_skb, skb); |
| skb_tx_timestamp(skb); |
| |
| /* clear TX_END status */ |
| mp->work_tx_end &= ~(1 << txq->index); |
| |
| /* ensure all descriptors are written before poking hardware */ |
| wmb(); |
| txq_enable(txq); |
| txq->tx_desc_count += desc_count; |
| return 0; |
| err_release: |
| /* TODO: Release all used data descriptors; header descriptors must not |
| * be DMA-unmapped. |
| */ |
| return ret; |
| } |
| |
| static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) |
| { |
| struct mv643xx_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 mv643xx_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, ret; |
| |
| cmd_sts = 0; |
| l4i_chk = 0; |
| |
| ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len); |
| if (ret) { |
| dev_kfree_skb_any(skb); |
| return ret; |
| } |
| 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; |
| |
| /* clear TX_END status */ |
| mp->work_tx_end &= ~(1 << txq->index); |
| |
| /* 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 mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int length, queue, ret; |
| 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; |
| } |
| |
| if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) { |
| if (net_ratelimit()) |
| netdev_err(dev, "tx queue full?!\n"); |
| txq->tx_dropped++; |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| length = skb->len; |
| |
| if (skb_is_gso(skb)) |
| ret = txq_submit_tso(txq, skb, dev); |
| else |
| ret = txq_submit_skb(txq, skb); |
| if (!ret) { |
| int entries_left; |
| |
| txq->tx_bytes += length; |
| txq->tx_packets++; |
| |
| entries_left = txq->tx_ring_size - txq->tx_desc_count; |
| if (entries_left < MAX_SKB_FRAGS + 1) |
| netif_tx_stop_queue(nq); |
| } else if (ret == -EBUSY) { |
| return NETDEV_TX_BUSY; |
| } else { |
| txq->tx_dropped++; |
| dev_kfree_skb_any(skb); |
| } |
| |
| return NETDEV_TX_OK; |
| } |
| |
| |
| /* tx napi ******************************************************************/ |
| static void txq_kick(struct tx_queue *txq) |
| { |
| struct mv643xx_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, TXQ_COMMAND) & (1 << txq->index)) |
| 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); |
| |
| mp->work_tx_end &= ~(1 << txq->index); |
| } |
| |
| static int txq_reclaim(struct tx_queue *txq, int budget, int force) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); |
| int reclaimed; |
| |
| __netif_tx_lock_bh(nq); |
| |
| 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++; |
| } |
| |
| dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr, |
| desc->byte_cnt, DMA_TO_DEVICE); |
| dev_kfree_skb(skb); |
| } |
| |
| __netif_tx_unlock_bh(nq); |
| |
| if (reclaimed < budget) |
| mp->work_tx &= ~(1 << txq->index); |
| |
| return reclaimed; |
| } |
| |
| |
| /* tx rate control **********************************************************/ |
| /* |
| * Set total maximum TX rate (shared by all TX queues for this port) |
| * to 'rate' bits per second, with a maximum burst of 'burst' bytes. |
| */ |
| static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst) |
| { |
| int token_rate; |
| int mtu; |
| int bucket_size; |
| |
| token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); |
| if (token_rate > 1023) |
| token_rate = 1023; |
| |
| mtu = (mp->dev->mtu + 255) >> 8; |
| if (mtu > 63) |
| mtu = 63; |
| |
| bucket_size = (burst + 255) >> 8; |
| if (bucket_size > 65535) |
| bucket_size = 65535; |
| |
| switch (mp->shared->tx_bw_control) { |
| case TX_BW_CONTROL_OLD_LAYOUT: |
| wrlp(mp, TX_BW_RATE, token_rate); |
| wrlp(mp, TX_BW_MTU, mtu); |
| wrlp(mp, TX_BW_BURST, bucket_size); |
| break; |
| case TX_BW_CONTROL_NEW_LAYOUT: |
| wrlp(mp, TX_BW_RATE_MOVED, token_rate); |
| wrlp(mp, TX_BW_MTU_MOVED, mtu); |
| wrlp(mp, TX_BW_BURST_MOVED, bucket_size); |
| break; |
| } |
| } |
| |
| static void txq_set_rate(struct tx_queue *txq, int rate, int burst) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| int token_rate; |
| int bucket_size; |
| |
| token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); |
| if (token_rate > 1023) |
| token_rate = 1023; |
| |
| bucket_size = (burst + 255) >> 8; |
| if (bucket_size > 65535) |
| bucket_size = 65535; |
| |
| wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14); |
| wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate); |
| } |
| |
| static void txq_set_fixed_prio_mode(struct tx_queue *txq) |
| { |
| struct mv643xx_eth_private *mp = txq_to_mp(txq); |
| int off; |
| u32 val; |
| |
| /* |
| * Turn on fixed priority mode. |
| */ |
| off = 0; |
| switch (mp->shared->tx_bw_control) { |
| case TX_BW_CONTROL_OLD_LAYOUT: |
| off = TXQ_FIX_PRIO_CONF; |
| break; |
| case TX_BW_CONTROL_NEW_LAYOUT: |
| off = TXQ_FIX_PRIO_CONF_MOVED; |
| break; |
| } |
| |
| if (off) { |
| val = rdlp(mp, off); |
| val |= 1 << txq->index; |
| wrlp(mp, off, val); |
| } |
| } |
| |
| |
| /* mii management interface *************************************************/ |
| static void mv643xx_eth_adjust_link(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL); |
| u32 autoneg_disable = FORCE_LINK_PASS | |
| DISABLE_AUTO_NEG_SPEED_GMII | |
| DISABLE_AUTO_NEG_FOR_FLOW_CTRL | |
| DISABLE_AUTO_NEG_FOR_DUPLEX; |
| |
| if (mp->phy->autoneg == AUTONEG_ENABLE) { |
| /* enable auto negotiation */ |
| pscr &= ~autoneg_disable; |
| goto out_write; |
| } |
| |
| pscr |= autoneg_disable; |
| |
| if (mp->phy->speed == SPEED_1000) { |
| /* force gigabit, half duplex not supported */ |
| pscr |= SET_GMII_SPEED_TO_1000; |
| pscr |= SET_FULL_DUPLEX_MODE; |
| goto out_write; |
| } |
| |
| pscr &= ~SET_GMII_SPEED_TO_1000; |
| |
| 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_SERIAL_CONTROL, pscr); |
| } |
| |
| /* statistics ***************************************************************/ |
| static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) |
| { |
| struct mv643xx_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 mv643xx_eth_private *mp, int offset) |
| { |
| return rdl(mp, MIB_COUNTERS(mp->port_num) + offset); |
| } |
| |
| static void mib_counters_clear(struct mv643xx_eth_private *mp) |
| { |
| int i; |
| |
| for (i = 0; i < 0x80; i += 4) |
| mib_read(mp, i); |
| |
| /* Clear non MIB hw counters also */ |
| rdlp(mp, RX_DISCARD_FRAME_CNT); |
| rdlp(mp, RX_OVERRUN_FRAME_CNT); |
| } |
| |
| static void mib_counters_update(struct mv643xx_eth_private *mp) |
| { |
| struct mib_counters *p = &mp->mib_counters; |
| |
| spin_lock_bh(&mp->mib_counters_lock); |
| p->good_octets_received += mib_read(mp, 0x00); |
| p->bad_octets_received += mib_read(mp, 0x08); |
| p->internal_mac_transmit_err += mib_read(mp, 0x0c); |
| p->good_frames_received += mib_read(mp, 0x10); |
| p->bad_frames_received += mib_read(mp, 0x14); |
| p->broadcast_frames_received += mib_read(mp, 0x18); |
| p->multicast_frames_received += mib_read(mp, 0x1c); |
| p->frames_64_octets += mib_read(mp, 0x20); |
| p->frames_65_to_127_octets += mib_read(mp, 0x24); |
| p->frames_128_to_255_octets += mib_read(mp, 0x28); |
| p->frames_256_to_511_octets += mib_read(mp, 0x2c); |
| p->frames_512_to_1023_octets += mib_read(mp, 0x30); |
| p->frames_1024_to_max_octets += mib_read(mp, 0x34); |
| p->good_octets_sent += mib_read(mp, 0x38); |
| p->good_frames_sent += mib_read(mp, 0x40); |
| p->excessive_collision += mib_read(mp, 0x44); |
| p->multicast_frames_sent += mib_read(mp, 0x48); |
| p->broadcast_frames_sent += mib_read(mp, 0x4c); |
| p->unrec_mac_control_received += mib_read(mp, 0x50); |
| p->fc_sent += mib_read(mp, 0x54); |
| p->good_fc_received += mib_read(mp, 0x58); |
| p->bad_fc_received += mib_read(mp, 0x5c); |
| p->undersize_received += mib_read(mp, 0x60); |
| p->fragments_received += mib_read(mp, 0x64); |
| p->oversize_received += mib_read(mp, 0x68); |
| p->jabber_received += mib_read(mp, 0x6c); |
| p->mac_receive_error += mib_read(mp, 0x70); |
| p->bad_crc_event += mib_read(mp, 0x74); |
| p->collision += mib_read(mp, 0x78); |
| p->late_collision += mib_read(mp, 0x7c); |
| /* Non MIB hardware counters */ |
| p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT); |
| p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT); |
| spin_unlock_bh(&mp->mib_counters_lock); |
| } |
| |
| static void mib_counters_timer_wrapper(unsigned long _mp) |
| { |
| struct mv643xx_eth_private *mp = (void *)_mp; |
| mib_counters_update(mp); |
| mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); |
| } |
| |
| |
| /* interrupt coalescing *****************************************************/ |
| /* |
| * Hardware coalescing parameters are set in units of 64 t_clk |
| * cycles. I.e.: |
| * |
| * coal_delay_in_usec = 64000000 * register_value / t_clk_rate |
| * |
| * register_value = coal_delay_in_usec * t_clk_rate / 64000000 |
| * |
| * In the ->set*() methods, we round the computed register value |
| * to the nearest integer. |
| */ |
| static unsigned int get_rx_coal(struct mv643xx_eth_private *mp) |
| { |
| u32 val = rdlp(mp, SDMA_CONFIG); |
| u64 temp; |
| |
| if (mp->shared->extended_rx_coal_limit) |
| temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7); |
| else |
| temp = (val & 0x003fff00) >> 8; |
| |
| temp *= 64000000; |
| do_div(temp, mp->t_clk); |
| |
| return (unsigned int)temp; |
| } |
| |
| static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) |
| { |
| u64 temp; |
| u32 val; |
| |
| temp = (u64)usec * mp->t_clk; |
| temp += 31999999; |
| do_div(temp, 64000000); |
| |
| val = rdlp(mp, SDMA_CONFIG); |
| if (mp->shared->extended_rx_coal_limit) { |
| if (temp > 0xffff) |
| temp = 0xffff; |
| val &= ~0x023fff80; |
| val |= (temp & 0x8000) << 10; |
| val |= (temp & 0x7fff) << 7; |
| } else { |
| if (temp > 0x3fff) |
| temp = 0x3fff; |
| val &= ~0x003fff00; |
| val |= (temp & 0x3fff) << 8; |
| } |
| wrlp(mp, SDMA_CONFIG, val); |
| } |
| |
| static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) |
| { |
| u64 temp; |
| |
| temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; |
| temp *= 64000000; |
| do_div(temp, mp->t_clk); |
| |
| return (unsigned int)temp; |
| } |
| |
| static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) |
| { |
| u64 temp; |
| |
| temp = (u64)usec * mp->t_clk; |
| temp += 31999999; |
| do_div(temp, 64000000); |
| |
| if (temp > 0x3fff) |
| temp = 0x3fff; |
| |
| wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); |
| } |
| |
| |
| /* ethtool ******************************************************************/ |
| struct mv643xx_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 } |
| |
| #define MIBSTAT(m) \ |
| { #m, FIELD_SIZEOF(struct mib_counters, m), \ |
| -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } |
| |
| static const struct mv643xx_eth_stats mv643xx_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), |
| MIBSTAT(good_octets_received), |
| MIBSTAT(bad_octets_received), |
| MIBSTAT(internal_mac_transmit_err), |
| MIBSTAT(good_frames_received), |
| MIBSTAT(bad_frames_received), |
| MIBSTAT(broadcast_frames_received), |
| MIBSTAT(multicast_frames_received), |
| MIBSTAT(frames_64_octets), |
| MIBSTAT(frames_65_to_127_octets), |
| MIBSTAT(frames_128_to_255_octets), |
| MIBSTAT(frames_256_to_511_octets), |
| MIBSTAT(frames_512_to_1023_octets), |
| MIBSTAT(frames_1024_to_max_octets), |
| MIBSTAT(good_octets_sent), |
| MIBSTAT(good_frames_sent), |
| MIBSTAT(excessive_collision), |
| MIBSTAT(multicast_frames_sent), |
| MIBSTAT(broadcast_frames_sent), |
| MIBSTAT(unrec_mac_control_received), |
| MIBSTAT(fc_sent), |
| MIBSTAT(good_fc_received), |
| MIBSTAT(bad_fc_received), |
| MIBSTAT(undersize_received), |
| MIBSTAT(fragments_received), |
| MIBSTAT(oversize_received), |
| MIBSTAT(jabber_received), |
| MIBSTAT(mac_receive_error), |
| MIBSTAT(bad_crc_event), |
| MIBSTAT(collision), |
| MIBSTAT(late_collision), |
| MIBSTAT(rx_discard), |
| MIBSTAT(rx_overrun), |
| }; |
| |
| static int |
| mv643xx_eth_get_settings_phy(struct mv643xx_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); |
| |
| /* |
| * The MAC does not support 1000baseT_Half. |
| */ |
| cmd->supported &= ~SUPPORTED_1000baseT_Half; |
| cmd->advertising &= ~ADVERTISED_1000baseT_Half; |
| |
| return err; |
| } |
| |
| static int |
| mv643xx_eth_get_settings_phyless(struct mv643xx_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; |
| case PORT_SPEED_1000: |
| ethtool_cmd_speed_set(cmd, SPEED_1000); |
| 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 |
| mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| wol->supported = 0; |
| wol->wolopts = 0; |
| if (mp->phy) |
| phy_ethtool_get_wol(mp->phy, wol); |
| } |
| |
| static int |
| mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int err; |
| |
| if (mp->phy == NULL) |
| return -EOPNOTSUPP; |
| |
| err = phy_ethtool_set_wol(mp->phy, wol); |
| /* Given that mv643xx_eth 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 |
| mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| if (mp->phy != NULL) |
| return mv643xx_eth_get_settings_phy(mp, cmd); |
| else |
| return mv643xx_eth_get_settings_phyless(mp, cmd); |
| } |
| |
| static int |
| mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int ret; |
| |
| if (mp->phy == NULL) |
| return -EINVAL; |
| |
| /* |
| * The MAC does not support 1000baseT_Half. |
| */ |
| cmd->advertising &= ~ADVERTISED_1000baseT_Half; |
| |
| ret = phy_ethtool_sset(mp->phy, cmd); |
| if (!ret) |
| mv643xx_eth_adjust_link(dev); |
| return ret; |
| } |
| |
| static void mv643xx_eth_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *drvinfo) |
| { |
| strlcpy(drvinfo->driver, mv643xx_eth_driver_name, |
| sizeof(drvinfo->driver)); |
| strlcpy(drvinfo->version, mv643xx_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(mv643xx_eth_stats); |
| } |
| |
| static int mv643xx_eth_nway_reset(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| if (mp->phy == NULL) |
| return -EINVAL; |
| |
| return genphy_restart_aneg(mp->phy); |
| } |
| |
| static int |
| mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| ec->rx_coalesce_usecs = get_rx_coal(mp); |
| ec->tx_coalesce_usecs = get_tx_coal(mp); |
| |
| return 0; |
| } |
| |
| static int |
| mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| set_rx_coal(mp, ec->rx_coalesce_usecs); |
| set_tx_coal(mp, ec->tx_coalesce_usecs); |
| |
| return 0; |
| } |
| |
| static void |
| mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er) |
| { |
| struct mv643xx_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 |
| mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er) |
| { |
| struct mv643xx_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 (netif_running(dev)) { |
| mv643xx_eth_stop(dev); |
| if (mv643xx_eth_open(dev)) { |
| netdev_err(dev, |
| "fatal error on re-opening device after ring param change\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| static int |
| mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| bool rx_csum = features & NETIF_F_RXCSUM; |
| |
| wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); |
| |
| return 0; |
| } |
| |
| static void mv643xx_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(mv643xx_eth_stats); i++) { |
| memcpy(data + i * ETH_GSTRING_LEN, |
| mv643xx_eth_stats[i].stat_string, |
| ETH_GSTRING_LEN); |
| } |
| } |
| } |
| |
| static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, |
| struct ethtool_stats *stats, |
| uint64_t *data) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int i; |
| |
| mv643xx_eth_get_stats(dev); |
| mib_counters_update(mp); |
| |
| for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { |
| const struct mv643xx_eth_stats *stat; |
| void *p; |
| |
| stat = mv643xx_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 mv643xx_eth_get_sset_count(struct net_device *dev, int sset) |
| { |
| if (sset == ETH_SS_STATS) |
| return ARRAY_SIZE(mv643xx_eth_stats); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static const struct ethtool_ops mv643xx_eth_ethtool_ops = { |
| .get_settings = mv643xx_eth_get_settings, |
| .set_settings = mv643xx_eth_set_settings, |
| .get_drvinfo = mv643xx_eth_get_drvinfo, |
| .nway_reset = mv643xx_eth_nway_reset, |
| .get_link = ethtool_op_get_link, |
| .get_coalesce = mv643xx_eth_get_coalesce, |
| .set_coalesce = mv643xx_eth_set_coalesce, |
| .get_ringparam = mv643xx_eth_get_ringparam, |
| .set_ringparam = mv643xx_eth_set_ringparam, |
| .get_strings = mv643xx_eth_get_strings, |
| .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, |
| .get_sset_count = mv643xx_eth_get_sset_count, |
| .get_ts_info = ethtool_op_get_ts_info, |
| .get_wol = mv643xx_eth_get_wol, |
| .set_wol = mv643xx_eth_set_wol, |
| }; |
| |
| |
| /* address handling *********************************************************/ |
| static void uc_addr_get(struct mv643xx_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 mv643xx_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 u32 uc_addr_filter_mask(struct net_device *dev) |
| { |
| struct netdev_hw_addr *ha; |
| u32 nibbles; |
| |
| if (dev->flags & IFF_PROMISC) |
| return 0; |
| |
| nibbles = 1 << (dev->dev_addr[5] & 0x0f); |
| netdev_for_each_uc_addr(ha, dev) { |
| if (memcmp(dev->dev_addr, ha->addr, 5)) |
| return 0; |
| if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) |
| return 0; |
| |
| nibbles |= 1 << (ha->addr[5] & 0x0f); |
| } |
| |
| return nibbles; |
| } |
| |
| static void mv643xx_eth_program_unicast_filter(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| u32 port_config; |
| u32 nibbles; |
| int i; |
| |
| uc_addr_set(mp, dev->dev_addr); |
| |
| port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; |
| |
| nibbles = uc_addr_filter_mask(dev); |
| if (!nibbles) { |
| port_config |= UNICAST_PROMISCUOUS_MODE; |
| nibbles = 0xffff; |
| } |
| |
| for (i = 0; i < 16; i += 4) { |
| int off = UNICAST_TABLE(mp->port_num) + i; |
| u32 v; |
| |
| v = 0; |
| if (nibbles & 1) |
| v |= 0x00000001; |
| if (nibbles & 2) |
| v |= 0x00000100; |
| if (nibbles & 4) |
| v |= 0x00010000; |
| if (nibbles & 8) |
| v |= 0x01000000; |
| nibbles >>= 4; |
| |
| wrl(mp, off, v); |
| } |
| |
| wrlp(mp, PORT_CONFIG, port_config); |
| } |
| |
| static int addr_crc(unsigned char *addr) |
| { |
| int crc = 0; |
| int i; |
| |
| for (i = 0; i < 6; i++) { |
| int j; |
| |
| crc = (crc ^ addr[i]) << 8; |
| for (j = 7; j >= 0; j--) { |
| if (crc & (0x100 << j)) |
| crc ^= 0x107 << j; |
| } |
| } |
| |
| return crc; |
| } |
| |
| static void mv643xx_eth_program_multicast_filter(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| u32 *mc_spec; |
| u32 *mc_other; |
| struct netdev_hw_addr *ha; |
| int i; |
| |
| if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
| int port_num; |
| u32 accept; |
| |
| oom: |
| port_num = mp->port_num; |
| accept = 0x01010101; |
| for (i = 0; i < 0x100; i += 4) { |
| wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept); |
| wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept); |
| } |
| return; |
| } |
| |
| mc_spec = kmalloc(0x200, GFP_ATOMIC); |
| if (mc_spec == NULL) |
| goto oom; |
| mc_other = mc_spec + (0x100 >> 2); |
| |
| memset(mc_spec, 0, 0x100); |
| memset(mc_other, 0, 0x100); |
| |
| netdev_for_each_mc_addr(ha, dev) { |
| u8 *a = ha->addr; |
| u32 *table; |
| int entry; |
| |
| if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { |
| table = mc_spec; |
| entry = a[5]; |
| } else { |
| table = mc_other; |
| entry = addr_crc(a); |
| } |
| |
| table[entry >> 2] |= 1 << (8 * (entry & 3)); |
| } |
| |
| for (i = 0; i < 0x100; i += 4) { |
| wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]); |
| wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]); |
| } |
| |
| kfree(mc_spec); |
| } |
| |
| static void mv643xx_eth_set_rx_mode(struct net_device *dev) |
| { |
| mv643xx_eth_program_unicast_filter(dev); |
| mv643xx_eth_program_multicast_filter(dev); |
| } |
| |
| static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) |
| { |
| struct sockaddr *sa = addr; |
| |
| if (!is_valid_ether_addr(sa->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); |
| |
| netif_addr_lock_bh(dev); |
| mv643xx_eth_program_unicast_filter(dev); |
| netif_addr_unlock_bh(dev); |
| |
| return 0; |
| } |
| |
| |
| /* rx/tx queue initialisation ***********************************************/ |
| static int rxq_init(struct mv643xx_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 mv643xx_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 mv643xx_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); |
| } |
| |
| /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ |
| txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent, |
| txq->tx_ring_size * TSO_HEADER_SIZE, |
| &txq->tso_hdrs_dma, GFP_KERNEL); |
| if (txq->tso_hdrs == NULL) { |
| dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, |
| txq->tx_desc_area, txq->tx_desc_dma); |
| return -ENOMEM; |
| } |
| skb_queue_head_init(&txq->tx_skb); |
| |
| return 0; |
| } |
| |
| static void txq_deinit(struct tx_queue *txq) |
| { |
| struct mv643xx_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); |
| if (txq->tso_hdrs) |
| dma_free_coherent(mp->dev->dev.parent, |
| txq->tx_ring_size * TSO_HEADER_SIZE, |
| txq->tso_hdrs, txq->tso_hdrs_dma); |
| } |
| |
| |
| /* netdev ops and related ***************************************************/ |
| static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) |
| { |
| u32 int_cause; |
| u32 int_cause_ext; |
| |
| int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; |
| if (int_cause == 0) |
| return 0; |
| |
| int_cause_ext = 0; |
| if (int_cause & INT_EXT) { |
| int_cause &= ~INT_EXT; |
| int_cause_ext = rdlp(mp, INT_CAUSE_EXT); |
| } |
| |
| if (int_cause) { |
| wrlp(mp, INT_CAUSE, ~int_cause); |
| mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & |
| ~(rdlp(mp, TXQ_COMMAND) & 0xff); |
| mp->work_rx |= (int_cause & INT_RX) >> 2; |
| } |
| |
| int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; |
| if (int_cause_ext) { |
| wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); |
| if (int_cause_ext & INT_EXT_LINK_PHY) |
| mp->work_link = 1; |
| mp->work_tx |= int_cause_ext & INT_EXT_TX; |
| } |
| |
| return 1; |
| } |
| |
| static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) |
| { |
| struct net_device *dev = (struct net_device *)dev_id; |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| if (unlikely(!mv643xx_eth_collect_events(mp))) |
| return IRQ_NONE; |
| |
| wrlp(mp, INT_MASK, 0); |
| napi_schedule(&mp->napi); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void handle_link_event(struct mv643xx_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; |
| case PORT_SPEED_1000: |
| speed = 1000; |
| 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 int mv643xx_eth_poll(struct napi_struct *napi, int budget) |
| { |
| struct mv643xx_eth_private *mp; |
| int work_done; |
| |
| mp = container_of(napi, struct mv643xx_eth_private, napi); |
| |
| if (unlikely(mp->oom)) { |
| mp->oom = 0; |
| del_timer(&mp->rx_oom); |
| } |
| |
| work_done = 0; |
| while (work_done < budget) { |
| u8 queue_mask; |
| int queue; |
| int work_tbd; |
| |
| if (mp->work_link) { |
| mp->work_link = 0; |
| handle_link_event(mp); |
| work_done++; |
| continue; |
| } |
| |
| queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; |
| if (likely(!mp->oom)) |
| queue_mask |= mp->work_rx_refill; |
| |
| if (!queue_mask) { |
| if (mv643xx_eth_collect_events(mp)) |
| continue; |
| break; |
| } |
| |
| queue = fls(queue_mask) - 1; |
| queue_mask = 1 << queue; |
| |
| work_tbd = budget - work_done; |
| if (work_tbd > 16) |
| work_tbd = 16; |
| |
| if (mp->work_tx_end & queue_mask) { |
| txq_kick(mp->txq + queue); |
| } else if (mp->work_tx & queue_mask) { |
| work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); |
| txq_maybe_wake(mp->txq + queue); |
| } else if (mp->work_rx & queue_mask) { |
| work_done += rxq_process(mp->rxq + queue, work_tbd); |
| } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { |
| work_done += rxq_refill(mp->rxq + queue, work_tbd); |
| } else { |
| BUG(); |
| } |
| } |
| |
| 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 mv643xx_eth_private *mp = (void *)data; |
| |
| napi_schedule(&mp->napi); |
| } |
| |
| static void port_start(struct mv643xx_eth_private *mp) |
| { |
| u32 pscr; |
| int i; |
| |
| /* |
| * Perform PHY reset, if there is a PHY. |
| */ |
| if (mp->phy != NULL) { |
| struct ethtool_cmd cmd; |
| |
| mv643xx_eth_get_settings(mp->dev, &cmd); |
| phy_init_hw(mp->phy); |
| mv643xx_eth_set_settings(mp->dev, &cmd); |
| phy_start(mp->phy); |
| } |
| |
| /* |
| * Configure basic link parameters. |
| */ |
| pscr = rdlp(mp, PORT_SERIAL_CONTROL); |
| |
| pscr |= SERIAL_PORT_ENABLE; |
| wrlp(mp, PORT_SERIAL_CONTROL, pscr); |
| |
| pscr |= DO_NOT_FORCE_LINK_FAIL; |
| if (mp->phy == NULL) |
| pscr |= FORCE_LINK_PASS; |
| wrlp(mp, PORT_SERIAL_CONTROL, pscr); |
| |
| /* |
| * Configure TX path and queues. |
| */ |
| tx_set_rate(mp, 1000000000, 16777216); |
| for (i = 0; i < mp->txq_count; i++) { |
| struct tx_queue *txq = mp->txq + i; |
| |
| txq_reset_hw_ptr(txq); |
| txq_set_rate(txq, 1000000000, 16777216); |
| txq_set_fixed_prio_mode(txq); |
| } |
| |
| /* |
| * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast |
| * frames to RX queue #0, and include the pseudo-header when |
| * calculating receive checksums. |
| */ |
| mv643xx_eth_set_features(mp->dev, mp->dev->features); |
| |
| /* |
| * Treat BPDUs as normal multicasts, and disable partition mode. |
| */ |
| wrlp(mp, PORT_CONFIG_EXT, 0x00000000); |
| |
| /* |
| * Add configured unicast addresses to address filter table. |
| */ |
| mv643xx_eth_program_unicast_filter(mp->dev); |
| |
| /* |
| * 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); |
| |
| rxq_enable(rxq); |
| } |
| } |
| |
| static void mv643xx_eth_recalc_skb_size(struct mv643xx_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 mv643xx_eth_open(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int err; |
| int i; |
| |
| wrlp(mp, INT_CAUSE, 0); |
| wrlp(mp, INT_CAUSE_EXT, 0); |
| rdlp(mp, INT_CAUSE_EXT); |
| |
| err = request_irq(dev->irq, mv643xx_eth_irq, |
| IRQF_SHARED, dev->name, dev); |
| if (err) { |
| netdev_err(dev, "can't assign irq\n"); |
| return -EAGAIN; |
| } |
| |
| mv643xx_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_END_0 << i; |
| } |
| |
| add_timer(&mp->mib_counters_timer); |
| port_start(mp); |
| |
| wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); |
| 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 mv643xx_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); |
| |
| while (1) { |
| u32 ps = rdlp(mp, PORT_STATUS); |
| |
| if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) |
| break; |
| udelay(10); |
| } |
| |
| /* Reset the Enable bit in the Configuration Register */ |
| data = rdlp(mp, PORT_SERIAL_CONTROL); |
| data &= ~(SERIAL_PORT_ENABLE | |
| DO_NOT_FORCE_LINK_FAIL | |
| FORCE_LINK_PASS); |
| wrlp(mp, PORT_SERIAL_CONTROL, data); |
| } |
| |
| static int mv643xx_eth_stop(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int i; |
| |
| wrlp(mp, INT_MASK_EXT, 0x00000000); |
| 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); |
| mv643xx_eth_get_stats(dev); |
| mib_counters_update(mp); |
| del_timer_sync(&mp->mib_counters_timer); |
| |
| 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 mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| int ret; |
| |
| if (mp->phy == NULL) |
| return -ENOTSUPP; |
| |
| ret = phy_mii_ioctl(mp->phy, ifr, cmd); |
| if (!ret) |
| mv643xx_eth_adjust_link(dev); |
| return ret; |
| } |
| |
| static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| if (new_mtu < 64 || new_mtu > 9500) |
| return -EINVAL; |
| |
| dev->mtu = new_mtu; |
| mv643xx_eth_recalc_skb_size(mp); |
| tx_set_rate(mp, 1000000000, 16777216); |
| |
| 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. |
| */ |
| mv643xx_eth_stop(dev); |
| if (mv643xx_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 mv643xx_eth_private *mp; |
| |
| mp = container_of(ugly, struct mv643xx_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 mv643xx_eth_tx_timeout(struct net_device *dev) |
| { |
| struct mv643xx_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 mv643xx_eth_netpoll(struct net_device *dev) |
| { |
| struct mv643xx_eth_private *mp = netdev_priv(dev); |
| |
| wrlp(mp, INT_MASK, 0x00000000); |
| rdlp(mp, INT_MASK); |
| |
| mv643xx_eth_irq(dev->irq, dev); |
| |
| wrlp(mp, INT_MASK, mp->int_mask); |
| } |
| #endif |
| |
| |
| /* platform glue ************************************************************/ |
| static void |
| mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, |
| const struct mbus_dram_target_info *dram) |
| { |
| void __iomem *base = msp->base; |
| u32 win_enable; |
| u32 win_protect; |
| int i; |
| |
| for (i = 0; i < 6; i++) { |
| writel(0, base + WINDOW_BASE(i)); |
| writel(0, base + WINDOW_SIZE(i)); |
| if (i < 4) |
| writel(0, base + WINDOW_REMAP_HIGH(i)); |
| } |
| |
| win_enable = 0x3f; |
| win_protect = 0; |
| |
| for (i = 0; i < dram->num_cs; i++) { |
| const struct mbus_dram_window *cs = dram->cs + i; |
| |
| writel((cs->base & 0xffff0000) | |
| (cs->mbus_attr << 8) | |
| dram->mbus_dram_target_id, base + WINDOW_BASE(i)); |
| writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); |
| |
| win_enable &= ~(1 << i); |
| win_protect |= 3 << (2 * i); |
| } |
| |
| writel(win_enable, base + WINDOW_BAR_ENABLE); |
| msp->win_protect = win_protect; |
| } |
| |
| static void infer_hw_params(struct mv643xx_eth_shared_private *msp) |
| { |
| /* |
| * Check whether we have a 14-bit coal limit field in bits |
| * [21:8], or a 16-bit coal limit in bits [25,21:7] of the |
| * SDMA config register. |
| */ |
| writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); |
| if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) |
| msp->extended_rx_coal_limit = 1; |
| else |
| msp->extended_rx_coal_limit = 0; |
| |
| /* |
| * Check whether the MAC supports TX rate control, and if |
| * yes, whether its associated registers are in the old or |
| * the new place. |
| */ |
| writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); |
| if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { |
| msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; |
| } else { |
| writel(7, msp->base + 0x0400 + TX_BW_RATE); |
| if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) |
| msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; |
| else |
| msp->tx_bw_control = TX_BW_CONTROL_ABSENT; |
| } |
| } |
| |
| #if defined(CONFIG_OF) |
| static const struct of_device_id mv643xx_eth_shared_ids[] = { |
| { .compatible = "marvell,orion-eth", }, |
| { .compatible = "marvell,kirkwood-eth", }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); |
| #endif |
| |
| #if defined(CONFIG_OF) && !defined(CONFIG_MV64X60) |
| #define mv643xx_eth_property(_np, _name, _v) \ |
| do { \ |
| u32 tmp; \ |
| if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ |
| _v = tmp; \ |
| } while (0) |
| |
| static struct platform_device *port_platdev[3]; |
| |
| static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, |
| struct device_node *pnp) |
| { |
| struct platform_device *ppdev; |
| struct mv643xx_eth_platform_data ppd; |
| struct resource res; |
| const char *mac_addr; |
| int ret; |
| int dev_num = 0; |
| |
| memset(&ppd, 0, sizeof(ppd)); |
| ppd.shared = pdev; |
| |
| memset(&res, 0, sizeof(res)); |
| if (!of_irq_to_resource(pnp, 0, &res)) { |
| dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name); |
| return -EINVAL; |
| } |
| |
| if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { |
| dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name); |
| return -EINVAL; |
| } |
| |
| if (ppd.port_number >= 3) { |
| dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name); |
| return -EINVAL; |
| } |
| |
| while (dev_num < 3 && port_platdev[dev_num]) |
| dev_num++; |
| |
| if (dev_num == 3) { |
| dev_err(&pdev->dev, "too many ports registered\n"); |
| return -EINVAL; |
| } |
| |
| mac_addr = of_get_mac_address(pnp); |
| if (mac_addr) |
| memcpy(ppd.mac_addr, mac_addr, ETH_ALEN); |
| |
| mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); |
| mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); |
| mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); |
| mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); |
| mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); |
| mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); |
| |
| ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); |
| if (!ppd.phy_node) { |
| ppd.phy_addr = MV643XX_ETH_PHY_NONE; |
| of_property_read_u32(pnp, "speed", &ppd.speed); |
| of_property_read_u32(pnp, "duplex", &ppd.duplex); |
| } |
| |
| ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); |
| if (!ppdev) |
| return -ENOMEM; |
| ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| ppdev->dev.of_node = pnp; |
| |
| ret = platform_device_add_resources(ppdev, &res, 1); |
| if (ret) |
| goto port_err; |
| |
| ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); |
| if (ret) |
| goto port_err; |
| |
| ret = platform_device_add(ppdev); |
| if (ret) |
| goto port_err; |
| |
| port_platdev[dev_num] = ppdev; |
| |
| return 0; |
| |
| port_err: |
| platform_device_put(ppdev); |
| return ret; |
| } |
| |
| static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) |
| { |
| struct mv643xx_eth_shared_platform_data *pd; |
| struct device_node *pnp, *np = pdev->dev.of_node; |
| int ret; |
| |
| /* bail out if not registered from DT */ |
| if (!np) |
| return 0; |
| |
| pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); |
| if (!pd) |
| return -ENOMEM; |
| pdev->dev.platform_data = pd; |
| |
| mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); |
| |
| for_each_available_child_of_node(np, pnp) { |
| ret = mv643xx_eth_shared_of_add_port(pdev, pnp); |
| if (ret) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static void mv643xx_eth_shared_of_remove(void) |
| { |
| int n; |
| |
| for (n = 0; n < 3; n++) { |
| platform_device_del(port_platdev[n]); |
| port_platdev[n] = NULL; |
| } |
| } |
| #else |
| static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| static inline void mv643xx_eth_shared_of_remove(void) |
| { |
| } |
| #endif |
| |
| static int mv643xx_eth_shared_probe(struct platform_device *pdev) |
| { |
| static int mv643xx_eth_version_printed; |
| struct mv643xx_eth_shared_platform_data *pd; |
| struct mv643xx_eth_shared_private *msp; |
| const struct mbus_dram_target_info *dram; |
| struct resource *res; |
| int ret; |
| |
| if (!mv643xx_eth_version_printed++) |
| pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", |
| mv643xx_eth_driver_version); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (res == NULL) |
| return -EINVAL; |
| |
| msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); |
| if (msp == NULL) |
| return -ENOMEM; |
| platform_set_drvdata(pdev, msp); |
| |
| msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); |
| if (msp->base == NULL) |
| return -ENOMEM; |
| |
| msp->clk = devm_clk_get(&pdev->dev, NULL); |
| if (!IS_ERR(msp->clk)) |
| clk_prepare_enable(msp->clk); |
| |
| /* |
| * (Re-)program MBUS remapping windows if we are asked to. |
| */ |
| dram = mv_mbus_dram_info(); |
| if (dram) |
| mv643xx_eth_conf_mbus_windows(msp, dram); |
| |
| ret = mv643xx_eth_shared_of_probe(pdev); |
| if (ret) |
| return ret; |
| pd = dev_get_platdata(&pdev->dev); |
| |
| msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? |
| pd->tx_csum_limit : 9 * 1024; |
| infer_hw_params(msp); |
| |
| return 0; |
| } |
| |
| static int mv643xx_eth_shared_remove(struct platform_device *pdev) |
| { |
| struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); |
| |
| mv643xx_eth_shared_of_remove(); |
| if (!IS_ERR(msp->clk)) |
| clk_disable_unprepare(msp->clk); |
| return 0; |
| } |
| |
| static struct platform_driver mv643xx_eth_shared_driver = { |
| .probe = mv643xx_eth_shared_probe, |
| .remove = mv643xx_eth_shared_remove, |
| .driver = { |
| .name = MV643XX_ETH_SHARED_NAME, |
| .owner = THIS_MODULE, |
| .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), |
| }, |
| }; |
| |
| static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) |
| { |
| int addr_shift = 5 * mp->port_num; |
| u32 data; |
| |
| data = rdl(mp, PHY_ADDR); |
| data &= ~(0x1f << addr_shift); |
| data |= (phy_addr & 0x1f) << addr_shift; |
| wrl(mp, PHY_ADDR, data); |
| } |
| |
| static int phy_addr_get(struct mv643xx_eth_private *mp) |
| { |
| unsigned int data; |
| |
| data = rdl(mp, PHY_ADDR); |
| |
| return (data >> (5 * mp->port_num)) & 0x1f; |
| } |
| |
| static void set_params(struct mv643xx_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 struct phy_device *phy_scan(struct mv643xx_eth_private *mp, |
| int phy_addr) |
| { |
| struct phy_device *phydev; |
| int start; |
| int num; |
| int i; |
| char phy_id[MII_BUS_ID_SIZE + 3]; |
| |
| if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { |
| start = phy_addr_get(mp) & 0x1f; |
| num = 32; |
| } else { |
| start = phy_addr & 0x1f; |
| num = 1; |
| } |
| |
| /* Attempt to connect to the PHY using orion-mdio */ |
| phydev = ERR_PTR(-ENODEV); |
| for (i = 0; i < num; i++) { |
| int addr = (start + i) & 0x1f; |
| |
| snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, |
| "orion-mdio-mii", addr); |
| |
| phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, |
| PHY_INTERFACE_MODE_GMII); |
| if (!IS_ERR(phydev)) { |
| phy_addr_set(mp, addr); |
| break; |
| } |
| } |
| |
| return phydev; |
| } |
| |
| static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) |
| { |
| struct phy_device *phy = mp->phy; |
| |
| if (speed == 0) { |
| phy->autoneg = AUTONEG_ENABLE; |
| phy->speed = 0; |
| phy->duplex = 0; |
| phy->advertising = phy->supported | ADVERTISED_Autoneg; |
| } else { |
| phy->autoneg = AUTONEG_DISABLE; |
| phy->advertising = 0; |
| phy->speed = speed; |
| phy->duplex = duplex; |
| } |
| phy_start_aneg(phy); |
| } |
| |
| static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) |
| { |
| u32 pscr; |
| |
| pscr = rdlp(mp, PORT_SERIAL_CONTROL); |
| if (pscr & SERIAL_PORT_ENABLE) { |
| pscr &= ~SERIAL_PORT_ENABLE; |
| wrlp(mp, PORT_SERIAL_CONTROL, pscr); |
| } |
| |
| pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; |
| if (mp->phy == NULL) { |
| pscr |= DISABLE_AUTO_NEG_SPEED_GMII; |
| if (speed == SPEED_1000) |
| pscr |= SET_GMII_SPEED_TO_1000; |
| else if (speed == SPEED_100) |
| pscr |= SET_MII_SPEED_TO_100; |
| |
| pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; |
| |
| pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; |
| if (duplex == DUPLEX_FULL) |
| pscr |= SET_FULL_DUPLEX_MODE; |
| } |
| |
| wrlp(mp, PORT_SERIAL_CONTROL, pscr); |
| } |
| |
| static const struct net_device_ops mv643xx_eth_netdev_ops = { |
| .ndo_open = mv643xx_eth_open, |
| .ndo_stop = mv643xx_eth_stop, |
| .ndo_start_xmit = mv643xx_eth_xmit, |
| .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, |
| .ndo_set_mac_address = mv643xx_eth_set_mac_address, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_do_ioctl = mv643xx_eth_ioctl, |
| .ndo_change_mtu = mv643xx_eth_change_mtu, |
| .ndo_set_features = mv643xx_eth_set_features, |
| .ndo_tx_timeout = mv643xx_eth_tx_timeout, |
| .ndo_get_stats = mv643xx_eth_get_stats, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = mv643xx_eth_netpoll, |
| #endif |
| }; |
| |
| static int mv643xx_eth_probe(struct platform_device *pdev) |
| { |
| struct mv643xx_eth_platform_data *pd; |
| struct mv643xx_eth_private *mp; |
| struct net_device *dev; |
| struct resource *res; |
| int err; |
| |
| pd = dev_get_platdata(&pdev->dev); |
| if (pd == NULL) { |
| dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); |
| return -ENODEV; |
| } |
| |
| if (pd->shared == NULL) { |
| dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); |
| return -ENODEV; |
| } |
| |
| dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); |
| if (!dev) |
| return -ENOMEM; |
| |
| mp = netdev_priv(dev); |
| platform_set_drvdata(pdev, mp); |
| |
| mp->shared = platform_get_drvdata(pd->shared); |
| mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); |
| mp->port_num = pd->port_number; |
| |
| mp->dev = dev; |
| |
| /* Kirkwood resets some registers on gated clocks. Especially |
| * CLK125_BYPASS_EN must be cleared but is not available on |
| * all other SoCs/System Controllers using this driver. |
| */ |
| if (of_device_is_compatible(pdev->dev.of_node, |
| "marvell,kirkwood-eth-port")) |
| wrlp(mp, PORT_SERIAL_CONTROL1, |
| rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); |
| |
| /* |
| * Start with a default rate, and if there is a clock, allow |
| * it to override the default. |
| */ |
| mp->t_clk = 133000000; |
| 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); |
| } else if (!IS_ERR(mp->shared->clk)) { |
| mp->t_clk = clk_get_rate(mp->shared->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); |
| |
| err = 0; |
| if (pd->phy_node) { |
| mp->phy = of_phy_connect(mp->dev, pd->phy_node, |
| mv643xx_eth_adjust_link, 0, |
| PHY_INTERFACE_MODE_GMII); |
| if (!mp->phy) |
| err = -ENODEV; |
| else |
| phy_addr_set(mp, mp->phy->addr); |
| } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { |
| mp->phy = phy_scan(mp, pd->phy_addr); |
| |
| if (IS_ERR(mp->phy)) |
| err = PTR_ERR(mp->phy); |
| else |
| phy_init(mp, pd->speed, pd->duplex); |
| } |
| if (err == -ENODEV) { |
| err = -EPROBE_DEFER; |
| goto out; |
| } |
| if (err) |
| goto out; |
| |
| dev->ethtool_ops = &mv643xx_eth_ethtool_ops; |
| |
| init_pscr(mp, pd->speed, pd->duplex); |
| |
| |
| mib_counters_clear(mp); |
| |
| init_timer(&mp->mib_counters_timer); |
| mp->mib_counters_timer.data = (unsigned long)mp; |
| mp->mib_counters_timer.function = mib_counters_timer_wrapper; |
| mp->mib_counters_timer.expires = jiffies + 30 * HZ; |
| |
| spin_lock_init(&mp->mib_counters_lock); |
| |
| INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); |
| |
| netif_napi_add(dev, &mp->napi, mv643xx_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 = &mv643xx_eth_netdev_ops; |
| |
| dev->watchdog_timeo = 2 * HZ; |
| dev->base_addr = 0; |
| |
| dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; |
| dev->vlan_features = dev->features; |
| |
| dev->features |= NETIF_F_RXCSUM; |
| dev->hw_features = dev->features; |
| |
| dev->priv_flags |= IFF_UNICAST_FLT; |
| |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| |
| if (mp->shared->win_protect) |
| wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); |
| |
| netif_carrier_off(dev); |
| |
| wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); |
| |
| set_rx_coal(mp, 250); |
| set_tx_coal(mp, 0); |
| |
| err = register_netdev(dev); |
| if (err) |
| goto out; |
| |
| netdev_notice(dev, "port %d with MAC address %pM\n", |
| mp->port_num, dev->dev_addr); |
| |
| if (mp->tx_desc_sram_size > 0) |
| netdev_notice(dev, "configured with sram\n"); |
| |
| return 0; |
| |
| out: |
| if (!IS_ERR(mp->clk)) |
| clk_disable_unprepare(mp->clk); |
| free_netdev(dev); |
| |
| return err; |
| } |
| |
| static int mv643xx_eth_remove(struct platform_device *pdev) |
| { |
| struct mv643xx_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 mv643xx_eth_shutdown(struct platform_device *pdev) |
| { |
| struct mv643xx_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 struct platform_driver mv643xx_eth_driver = { |
| .probe = mv643xx_eth_probe, |
| .remove = mv643xx_eth_remove, |
| .shutdown = mv643xx_eth_shutdown, |
| .driver = { |
| .name = MV643XX_ETH_NAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init mv643xx_eth_init_module(void) |
| { |
| int rc; |
| |
| rc = platform_driver_register(&mv643xx_eth_shared_driver); |
| if (!rc) { |
| rc = platform_driver_register(&mv643xx_eth_driver); |
| if (rc) |
| platform_driver_unregister(&mv643xx_eth_shared_driver); |
| } |
| |
| return rc; |
| } |
| module_init(mv643xx_eth_init_module); |
| |
| static void __exit mv643xx_eth_cleanup_module(void) |
| { |
| platform_driver_unregister(&mv643xx_eth_driver); |
| platform_driver_unregister(&mv643xx_eth_shared_driver); |
| } |
| module_exit(mv643xx_eth_cleanup_module); |
| |
| MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " |
| "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); |
| MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); |
| MODULE_ALIAS("platform:" MV643XX_ETH_NAME); |