diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/net/ubi32-eth.h')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/net/ubi32-eth.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/net/ubi32-eth.h b/target/linux/ubicom32/files/drivers/net/ubi32-eth.h new file mode 100644 index 000000000..c25500143 --- /dev/null +++ b/target/linux/ubicom32/files/drivers/net/ubi32-eth.h @@ -0,0 +1,132 @@ +/* + * drivers/net/ubi32-eth.h + * Ubicom32 ethernet TIO interface driver definitions. + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port 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. + * + * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ +#ifndef _UBI32_ETH_H +#define _UBI32_ETH_H + +#include <asm/devtree.h> + +#define UBI32_ETH_NUM_OF_DEVICES 2 + +/* + * Number of bytes trashed beyond the packet data. + */ +#define UBI32_ETH_TRASHED_MEMORY (CACHE_LINE_SIZE + ETH_HLEN - 1) + +/* + * Linux already reserves NET_SKB_PAD bytes of headroom in each sk_buff. + * We want to be able to reserve at least one cache line to align Ethernet + * and IP header to cache line. + * Note that the TIO expects a CACHE_LINE_SIZE - ETH_HLEN aligned Ethernet + * header, while satisfies NET_IP_ALIGN (= 2) automatically. + * (NET_SKB_PAD is 16, NET_IP_ALIGN is 2, CACHE_LINE_SIZE is 32). + * You can add more space by making UBI32_ETH_RESERVE_EXTRA != 0. + */ +#define UBI32_ETH_RESERVE_EXTRA (1 * CACHE_LINE_SIZE) +#define UBI32_ETH_RESERVE_SPACE (UBI32_ETH_RESERVE_EXTRA + CACHE_LINE_SIZE) + +struct ubi32_eth_dma_desc { + volatile void *data_pointer; /* pointer to the buffer */ + volatile u16 buffer_len; /* the buffer size */ + volatile u16 data_len; /* actual frame length */ + volatile u32 status; /* bit0: status to be update by VP; bit[31:1] time stamp */ +}; + +#define TX_DMA_RING_SIZE (1<<8) +#define TX_DMA_RING_MASK (TX_DMA_RING_SIZE - 1) +#define RX_DMA_RING_SIZE (1<<8) +#define RX_DMA_RING_MASK (RX_DMA_RING_SIZE - 1) + +#define RX_DMA_MAX_QUEUE_SIZE (RX_DMA_RING_SIZE - 1) /* no more than (RX_DMA_RING_SIZE - 1) */ +#define RX_MAX_PKT_SIZE (ETH_DATA_LEN + ETH_HLEN + VLAN_HLEN) +#define RX_MIN_PKT_SIZE ETH_ZLEN +#define RX_BUF_SIZE (RX_MAX_PKT_SIZE + VLAN_HLEN) /* allow double VLAN tag */ + +#define UBI32_ETH_VP_TX_TIMEOUT (10*HZ) + +struct ubi32_eth_vp_stats { + u32 rx_alloc_err; + u32 tx_q_full_cnt; + u32 rx_q_full_cnt; + u32 rx_throttle; +}; + +struct ubi32_eth_private { + struct net_device *dev; + struct ubi32_eth_vp_stats vp_stats; + spinlock_t lock; +#ifdef UBICOM32_USE_NAPI + struct napi_struct napi; +#else + struct tasklet_struct tsk; +#endif + struct ethtionode *regs; + u16 rx_tail; + u16 tx_tail; + u32 vp_int_bit; +}; + +struct ethtionode { + struct devtree_node dn; + volatile u16 command; + volatile u16 status; + volatile u16 int_mask; /* interrupt mask */ + volatile u16 int_status; /* interrupt mask */ + volatile u16 tx_in; /* owned by driver */ + volatile u16 tx_out; /* owned by vp */ + volatile u16 rx_in; /* owned by driver */ + volatile u16 rx_out; /* owned by vp */ + u16 tx_sz; /* owned by driver */ + u16 rx_sz; /* owned by driver */ + struct ubi32_eth_dma_desc **tx_dma_ring; + struct ubi32_eth_dma_desc **rx_dma_ring; +}; + +#define UBI32_ETH_VP_STATUS_LINK (1<<0) +#define UBI32_ETH_VP_STATUS_SPEED100 (0x1<<1) +#define UBI32_ETH_VP_STATUS_SPEED1000 (0x1<<2) +#define UBI32_ETH_VP_STATUS_DUPLEX (0x1<<3) +#define UBI32_ETH_VP_STATUS_FLOW_CTRL (0x1<<4) + +#define UBI32_ETH_VP_STATUS_RX_STATE (0x1<<5) +#define UBI32_ETH_VP_STATUS_TX_STATE (0x1<<6) + +#define UBI32_ETH_VP_STATUS_TX_Q_FULL (1<<8) + +#define UBI32_ETH_VP_INT_RX (1<<0) +#define UBI32_ETH_VP_INT_TX (1<<1) + +#define UBI32_ETH_VP_CMD_RX_ENABLE (1<<0) +#define UBI32_ETH_VP_CMD_TX_ENABLE (1<<1) + +#define UBI32_ETH_VP_RX_OK (1<<0) +#define UBI32_ETH_VP_TX_OK (1<<1) + +#define UBI32_TX_BOUND TX_DMA_RING_SIZE +#define UBI32_RX_BOUND 64 +#define UBI32_ETH_NAPI_WEIGHT 64 /* for GigE */ +#endif |