diff options
Diffstat (limited to 'drivers/net/mv643xx_eth.c')
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 3020 |
1 files changed, 0 insertions, 3020 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c deleted file mode 100644 index 259699983ca5..000000000000 --- a/drivers/net/mv643xx_eth.c +++ /dev/null @@ -1,3020 +0,0 @@ -/* - * 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> - * - * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#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 <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/types.h> -#include <linux/inet_lro.h> -#include <linux/slab.h> -#include <asm/system.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 SMI_REG 0x0004 -#define SMI_BUSY 0x10000000 -#define SMI_READ_VALID 0x08000000 -#define SMI_OPCODE_READ 0x04000000 -#define SMI_OPCODE_WRITE 0x00000000 -#define ERR_INT_CAUSE 0x0080 -#define ERR_INT_SMI_DONE 0x00000010 -#define ERR_INT_MASK 0x0084 -#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 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 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 256 -#define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) - - -/* - * 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 MAC_HDR_EXTRA_8_BYTES 0x00000200 - -#define TX_IHL_SHIFT 11 - - -/* global *******************************************************************/ -struct mv643xx_eth_shared_private { - /* - * Ethernet controller base address. - */ - void __iomem *base; - - /* - * Points at the right SMI instance to use. - */ - struct mv643xx_eth_shared_private *smi; - - /* - * Provides access to local SMI interface. - */ - struct mii_bus *smi_bus; - - /* - * If we have access to the error interrupt pin (which is - * somewhat misnamed as it not only reflects internal errors - * but also reflects SMI completion), use that to wait for - * SMI access completion instead of polling the SMI busy bit. - */ - int err_interrupt; - wait_queue_head_t smi_busy_wait; - - /* - * Per-port MBUS window access register value. - */ - u32 win_protect; - - /* - * Hardware-specific parameters. - */ - unsigned int t_clk; - int extended_rx_coal_limit; - int tx_bw_control; - int tx_csum_limit; -}; - -#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; -}; - -struct lro_counters { - u32 lro_aggregated; - u32 lro_flushed; - u32 lro_no_desc; -}; - -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 net_lro_mgr lro_mgr; - struct net_lro_desc lro_arr[8]; -}; - -struct tx_queue { - int index; - - int tx_ring_size; - - int tx_desc_count; - int tx_curr_desc; - int tx_used_desc; - - 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 lro_counters lro_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; - struct sk_buff_head rx_recycle; - - /* - * 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]; -}; - - -/* 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); - } -} - - -/* rx napi ******************************************************************/ -static int -mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph, - u64 *hdr_flags, void *priv) -{ - unsigned long cmd_sts = (unsigned long)priv; - - /* - * Make sure that this packet is Ethernet II, is not VLAN - * tagged, is IPv4, has a valid IP header, and is TCP. - */ - if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 | - RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK | - RX_PKT_IS_VLAN_TAGGED)) != - (RX_IP_HDR_OK | RX_PKT_IS_IPV4 | - RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4)) - return -1; - - skb_reset_network_header(skb); - skb_set_transport_header(skb, ip_hdrlen(skb)); - *iphdr = ip_hdr(skb); - *tcph = tcp_hdr(skb); - *hdr_flags = LRO_IPV4 | LRO_TCP; - - return 0; -} - -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 lro_flush_needed; - int rx; - - lro_flush_needed = 0; - 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); - - if (skb->dev->features & NETIF_F_LRO && - skb->ip_summed == CHECKSUM_UNNECESSARY) { - lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts); - lro_flush_needed = 1; - } else - netif_receive_skb(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 (lro_flush_needed) - lro_flush_all(&rxq->lro_mgr); - - 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 = __skb_dequeue(&mp->rx_recycle); - if (skb == NULL) - skb = dev_alloc_skb(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 - 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++) { - skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; - if (fragp->size <= 8 && fragp->page_offset & 7) - return 1; - } - - return 0; -} - -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; - - this_frag = &skb_shinfo(skb)->frags[frag]; - 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 = this_frag->size; - desc->buf_ptr = dma_map_page(mp->dev->dev.parent, - this_frag->page, - this_frag->page_offset, - this_frag->size, DMA_TO_DEVICE); - } -} - -static inline __be16 sum16_as_be(__sum16 sum) -{ - return (__force __be16)sum; -} - -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; - - cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; - l4i_chk = 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 (skb->len - hdr_len > mp->shared->tx_csum_limit || - unlikely(tag_bytes & ~12)) { - if (skb_checksum_help(skb) == 0) - goto no_csum; - kfree_skb(skb); - return 1; - } - - if (tag_bytes & 4) - cmd_sts |= MAC_HDR_EXTRA_4_BYTES; - if (tag_bytes & 8) - cmd_sts |= MAC_HDR_EXTRA_8_BYTES; - - cmd_sts |= GEN_TCP_UDP_CHECKSUM | - GEN_IP_V4_CHECKSUM | - ip_hdr(skb)->ihl << TX_IHL_SHIFT; - - switch (ip_hdr(skb)->protocol) { - case IPPROTO_UDP: - cmd_sts |= UDP_FRAME; - l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check)); - break; - case IPPROTO_TCP: - l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check)); - break; - default: - BUG(); - } - } else { -no_csum: - /* Errata BTS #50, IHL must be 5 if no HW checksum */ - cmd_sts |= 5 << TX_IHL_SHIFT; - } - - 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; - 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)) { - txq->tx_dropped++; - 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"); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - length = skb->len; - - if (!txq_submit_skb(txq, skb)) { - 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); - } - - 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(nq, smp_processor_id()); - - 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++; - } - - if (cmd_sts & TX_FIRST_DESC) { - dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr, - desc->byte_cnt, DMA_TO_DEVICE); - } else { - dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr, - desc->byte_cnt, DMA_TO_DEVICE); - } - - if (skb != NULL) { - if (skb_queue_len(&mp->rx_recycle) < - mp->rx_ring_size && - skb_recycle_check(skb, mp->skb_size)) - __skb_queue_head(&mp->rx_recycle, skb); - else - dev_kfree_skb(skb); - } - } - - __netif_tx_unlock(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->shared->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->shared->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 irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id) -{ - struct mv643xx_eth_shared_private *msp = dev_id; - - if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) { - writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE); - wake_up(&msp->smi_busy_wait); - return IRQ_HANDLED; - } - - return IRQ_NONE; -} - -static int smi_is_done(struct mv643xx_eth_shared_private *msp) -{ - return !(readl(msp->base + SMI_REG) & SMI_BUSY); -} - -static int smi_wait_ready(struct mv643xx_eth_shared_private *msp) -{ - if (msp->err_interrupt == NO_IRQ) { - int i; - - for (i = 0; !smi_is_done(msp); i++) { - if (i == 10) - return -ETIMEDOUT; - msleep(10); - } - - return 0; - } - - if (!smi_is_done(msp)) { - wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp), - msecs_to_jiffies(100)); - if (!smi_is_done(msp)) - return -ETIMEDOUT; - } - - return 0; -} - -static int smi_bus_read(struct mii_bus *bus, int addr, int reg) -{ - struct mv643xx_eth_shared_private *msp = bus->priv; - void __iomem *smi_reg = msp->base + SMI_REG; - int ret; - - if (smi_wait_ready(msp)) { - pr_warn("SMI bus busy timeout\n"); - return -ETIMEDOUT; - } - - writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg); - - if (smi_wait_ready(msp)) { - pr_warn("SMI bus busy timeout\n"); - return -ETIMEDOUT; - } - - ret = readl(smi_reg); - if (!(ret & SMI_READ_VALID)) { - pr_warn("SMI bus read not valid\n"); - return -ENODEV; - } - - return ret & 0xffff; -} - -static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val) -{ - struct mv643xx_eth_shared_private *msp = bus->priv; - void __iomem *smi_reg = msp->base + SMI_REG; - - if (smi_wait_ready(msp)) { - pr_warn("SMI bus busy timeout\n"); - return -ETIMEDOUT; - } - - writel(SMI_OPCODE_WRITE | (reg << 21) | - (addr << 16) | (val & 0xffff), smi_reg); - - if (smi_wait_ready(msp)) { - pr_warn("SMI bus busy timeout\n"); - return -ETIMEDOUT; - } - - return 0; -} - - -/* 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 void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp) -{ - u32 lro_aggregated = 0; - u32 lro_flushed = 0; - u32 lro_no_desc = 0; - int i; - - for (i = 0; i < mp->rxq_count; i++) { - struct rx_queue *rxq = mp->rxq + i; - - lro_aggregated += rxq->lro_mgr.stats.aggregated; - lro_flushed += rxq->lro_mgr.stats.flushed; - lro_no_desc += rxq->lro_mgr.stats.no_desc; - } - - mp->lro_counters.lro_aggregated = lro_aggregated; - mp->lro_counters.lro_flushed = lro_flushed; - mp->lro_counters.lro_no_desc = lro_no_desc; -} - -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); -} - -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); - spin_unlock_bh(&mp->mib_counters_lock); - - mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); -} - -static void mib_counters_timer_wrapper(unsigned long _mp) -{ - struct mv643xx_eth_private *mp = (void *)_mp; - - mib_counters_update(mp); -} - - -/* 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->shared->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->shared->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->shared->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->shared->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) } - -#define LROSTAT(m) \ - { #m, FIELD_SIZEOF(struct lro_counters, m), \ - -1, offsetof(struct mv643xx_eth_private, lro_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), - LROSTAT(lro_aggregated), - LROSTAT(lro_flushed), - LROSTAT(lro_no_desc), -}; - -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 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); - - if (mp->phy == NULL) - return -EINVAL; - - /* - * The MAC does not support 1000baseT_Half. - */ - cmd->advertising &= ~ADVERTISED_1000baseT_Half; - - return phy_ethtool_sset(mp->phy, cmd); -} - -static void mv643xx_eth_get_drvinfo(struct net_device *dev, - struct ethtool_drvinfo *drvinfo) -{ - strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32); - strncpy(drvinfo->version, mv643xx_eth_driver_version, 32); - strncpy(drvinfo->fw_version, "N/A", 32); - strncpy(drvinfo->bus_info, "platform", 32); - 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_mini_max_pending = 0; - er->rx_jumbo_max_pending = 0; - - er->rx_pending = mp->rx_ring_size; - er->tx_pending = mp->tx_ring_size; - er->rx_mini_pending = 0; - er->rx_jumbo_pending = 0; -} - -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, u32 features) -{ - struct mv643xx_eth_private *mp = netdev_priv(dev); - u32 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); - mv643xx_eth_grab_lro_stats(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, -}; - - -/* 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 -EINVAL; - - 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 = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb), - GFP_KERNEL); - if (rxq->rx_skb == NULL) { - netdev_err(mp->dev, "can't allocate rx skb ring\n"); - goto out_free; - } - - rx_desc = (struct 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); - } - - rxq->lro_mgr.dev = mp->dev; - memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats)); - rxq->lro_mgr.features = LRO_F_NAPI; - rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; - rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; - rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr); - rxq->lro_mgr.max_aggr = 32; - rxq->lro_mgr.frag_align_pad = 0; - rxq->lro_mgr.lro_arr = rxq->lro_arr; - rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header; - - memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr)); - - 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 = (struct 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 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); -} - - -/* 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 phy_reset(struct mv643xx_eth_private *mp) -{ - int data; - - data = phy_read(mp->phy, MII_BMCR); - if (data < 0) - return; - - data |= BMCR_RESET; - if (phy_write(mp->phy, MII_BMCR, data) < 0) - return; - - do { - data = phy_read(mp->phy, MII_BMCR); - } while (data >= 0 && data & BMCR_RESET); -} - -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_reset(mp); - mv643xx_eth_set_settings(mp->dev, &cmd); - } - - /* - * 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); - - skb_queue_head_init(&mp->rx_recycle); - - 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; - } - - 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); - - free_irq(dev->irq, dev); - - port_reset(mp); - mv643xx_eth_get_stats(dev); - mib_counters_update(mp); - del_timer_sync(&mp->mib_counters_timer); - - skb_queue_purge(&mp->rx_recycle); - - 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); - - if (mp->phy != NULL) - return phy_mii_ioctl(mp->phy, ifr, cmd); - - return -EOPNOTSUPP; -} - -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, - 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++) { - 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; - } -} - -static int mv643xx_eth_shared_probe(struct platform_device *pdev) -{ - static int mv643xx_eth_version_printed; - struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data; - struct mv643xx_eth_shared_private *msp; - 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); - - ret = -EINVAL; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) - goto out; - - ret = -ENOMEM; - msp = kzalloc(sizeof(*msp), GFP_KERNEL); - if (msp == NULL) - goto out; - - msp->base = ioremap(res->start, resource_size(res)); - if (msp->base == NULL) - goto out_free; - - /* - * Set up and register SMI bus. - */ - if (pd == NULL || pd->shared_smi == NULL) { - msp->smi_bus = mdiobus_alloc(); - if (msp->smi_bus == NULL) - goto out_unmap; - - msp->smi_bus->priv = msp; - msp->smi_bus->name = "mv643xx_eth smi"; - msp->smi_bus->read = smi_bus_read; - msp->smi_bus->write = smi_bus_write, - snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id); - msp->smi_bus->parent = &pdev->dev; - msp->smi_bus->phy_mask = 0xffffffff; - if (mdiobus_register(msp->smi_bus) < 0) - goto out_free_mii_bus; - msp->smi = msp; - } else { - msp->smi = platform_get_drvdata(pd->shared_smi); - } - - msp->err_interrupt = NO_IRQ; - init_waitqueue_head(&msp->smi_busy_wait); - - /* - * Check whether the error interrupt is hooked up. - */ - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (res != NULL) { - int err; - - err = request_irq(res->start, mv643xx_eth_err_irq, - IRQF_SHARED, "mv643xx_eth", msp); - if (!err) { - writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK); - msp->err_interrupt = res->start; - } - } - - /* - * (Re-)program MBUS remapping windows if we are asked to. - */ - if (pd != NULL && pd->dram != NULL) - mv643xx_eth_conf_mbus_windows(msp, pd->dram); - - /* - * Detect hardware parameters. - */ - msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000; - msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? - pd->tx_csum_limit : 9 * 1024; - infer_hw_params(msp); - - platform_set_drvdata(pdev, msp); - - return 0; - -out_free_mii_bus: - mdiobus_free(msp->smi_bus); -out_unmap: - iounmap(msp->base); -out_free: - kfree(msp); -out: - return ret; -} - -static int mv643xx_eth_shared_remove(struct platform_device *pdev) -{ - struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); - struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data; - - if (pd == NULL || pd->shared_smi == NULL) { - mdiobus_unregister(msp->smi_bus); - mdiobus_free(msp->smi_bus); - } - if (msp->err_interrupt != NO_IRQ) - free_irq(msp->err_interrupt, msp); - iounmap(msp->base); - kfree(msp); - - 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, - }, -}; - -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, 6); - 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 mii_bus *bus = mp->shared->smi->smi_bus; - struct phy_device *phydev; - int start; - int num; - int i; - - if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { - start = phy_addr_get(mp) & 0x1f; - num = 32; - } else { - start = phy_addr & 0x1f; - num = 1; - } - - phydev = NULL; - for (i = 0; i < num; i++) { - int addr = (start + i) & 0x1f; - - if (bus->phy_map[addr] == NULL) - mdiobus_scan(bus, addr); - - if (phydev == NULL) { - phydev = bus->phy_map[addr]; - if (phydev != NULL) - phy_addr_set(mp, addr); - } - } - - return phydev; -} - -static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) -{ - struct phy_device *phy = mp->phy; - - phy_reset(mp); - - phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII); - - 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 = pdev->dev.platform_data; - 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; - - set_params(mp, pd); - netif_set_real_num_tx_queues(dev, mp->txq_count); - netif_set_real_num_rx_queues(dev, mp->rxq_count); - - if (pd->phy_addr != MV643XX_ETH_PHY_NONE) - mp->phy = phy_scan(mp, pd->phy_addr); - - if (mp->phy != NULL) - phy_init(mp, pd->speed, pd->duplex); - - SET_ETHTOOL_OPS(dev, &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; - add_timer(&mp->mib_counters_timer); - - 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, 128); - - 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->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | - NETIF_F_RXCSUM | NETIF_F_LRO; - dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; - dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM; - - 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: - 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_detach(mp->phy); - cancel_work_sync(&mp->tx_timeout_task); - free_netdev(mp->dev); - - platform_set_drvdata(pdev, NULL); - - 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); |