diff options
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/altera/altera_tse.h | 486 | ||||
| -rw-r--r-- | drivers/net/ethernet/altera/altera_tse_main.c | 1543 |
2 files changed, 2029 insertions, 0 deletions
diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h new file mode 100644 index 000000000000..8feeed05de0e --- /dev/null +++ b/drivers/net/ethernet/altera/altera_tse.h @@ -0,0 +1,486 @@ +/* Altera Triple-Speed Ethernet MAC driver + * Copyright (C) 2008-2014 Altera Corporation. All rights reserved + * + * Contributors: + * Dalon Westergreen + * Thomas Chou + * Ian Abbott + * Yuriy Kozlov + * Tobias Klauser + * Andriy Smolskyy + * Roman Bulgakov + * Dmytro Mytarchuk + * Matthew Gerlach + * + * Original driver contributed by SLS. + * Major updates contributed by GlobalLogic + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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/>. + */ + +#ifndef __ALTERA_TSE_H__ +#define __ALTERA_TSE_H__ + +#define ALTERA_TSE_RESOURCE_NAME "altera_tse" + +#include <linux/bitops.h> +#include <linux/if_vlan.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/phy.h> + +#define ALTERA_TSE_SW_RESET_WATCHDOG_CNTR 10000 +#define ALTERA_TSE_MAC_FIFO_WIDTH 4 /* TX/RX FIFO width in + * bytes + */ +/* Rx FIFO default settings */ +#define ALTERA_TSE_RX_SECTION_EMPTY 16 +#define ALTERA_TSE_RX_SECTION_FULL 0 +#define ALTERA_TSE_RX_ALMOST_EMPTY 8 +#define ALTERA_TSE_RX_ALMOST_FULL 8 + +/* Tx FIFO default settings */ +#define ALTERA_TSE_TX_SECTION_EMPTY 16 +#define ALTERA_TSE_TX_SECTION_FULL 0 +#define ALTERA_TSE_TX_ALMOST_EMPTY 8 +#define ALTERA_TSE_TX_ALMOST_FULL 3 + +/* MAC function configuration default settings */ +#define ALTERA_TSE_TX_IPG_LENGTH 12 + +#define GET_BIT_VALUE(v, bit) (((v) >> (bit)) & 0x1) + +/* MAC Command_Config Register Bit Definitions + */ +#define MAC_CMDCFG_TX_ENA BIT(0) +#define MAC_CMDCFG_RX_ENA BIT(1) +#define MAC_CMDCFG_XON_GEN BIT(2) +#define MAC_CMDCFG_ETH_SPEED BIT(3) +#define MAC_CMDCFG_PROMIS_EN BIT(4) +#define MAC_CMDCFG_PAD_EN BIT(5) +#define MAC_CMDCFG_CRC_FWD BIT(6) +#define MAC_CMDCFG_PAUSE_FWD BIT(7) +#define MAC_CMDCFG_PAUSE_IGNORE BIT(8) +#define MAC_CMDCFG_TX_ADDR_INS BIT(9) +#define MAC_CMDCFG_HD_ENA BIT(10) +#define MAC_CMDCFG_EXCESS_COL BIT(11) +#define MAC_CMDCFG_LATE_COL BIT(12) +#define MAC_CMDCFG_SW_RESET BIT(13) +#define MAC_CMDCFG_MHASH_SEL BIT(14) +#define MAC_CMDCFG_LOOP_ENA BIT(15) +#define MAC_CMDCFG_TX_ADDR_SEL(v) (((v) & 0x7) << 16) +#define MAC_CMDCFG_MAGIC_ENA BIT(19) +#define MAC_CMDCFG_SLEEP BIT(20) +#define MAC_CMDCFG_WAKEUP BIT(21) +#define MAC_CMDCFG_XOFF_GEN BIT(22) +#define MAC_CMDCFG_CNTL_FRM_ENA BIT(23) +#define MAC_CMDCFG_NO_LGTH_CHECK BIT(24) +#define MAC_CMDCFG_ENA_10 BIT(25) +#define MAC_CMDCFG_RX_ERR_DISC BIT(26) +#define MAC_CMDCFG_DISABLE_READ_TIMEOUT BIT(27) +#define MAC_CMDCFG_CNT_RESET BIT(31) + +#define MAC_CMDCFG_TX_ENA_GET(v) GET_BIT_VALUE(v, 0) +#define MAC_CMDCFG_RX_ENA_GET(v) GET_BIT_VALUE(v, 1) +#define MAC_CMDCFG_XON_GEN_GET(v) GET_BIT_VALUE(v, 2) +#define MAC_CMDCFG_ETH_SPEED_GET(v) GET_BIT_VALUE(v, 3) +#define MAC_CMDCFG_PROMIS_EN_GET(v) GET_BIT_VALUE(v, 4) +#define MAC_CMDCFG_PAD_EN_GET(v) GET_BIT_VALUE(v, 5) +#define MAC_CMDCFG_CRC_FWD_GET(v) GET_BIT_VALUE(v, 6) +#define MAC_CMDCFG_PAUSE_FWD_GET(v) GET_BIT_VALUE(v, 7) +#define MAC_CMDCFG_PAUSE_IGNORE_GET(v) GET_BIT_VALUE(v, 8) +#define MAC_CMDCFG_TX_ADDR_INS_GET(v) GET_BIT_VALUE(v, 9) +#define MAC_CMDCFG_HD_ENA_GET(v) GET_BIT_VALUE(v, 10) +#define MAC_CMDCFG_EXCESS_COL_GET(v) GET_BIT_VALUE(v, 11) +#define MAC_CMDCFG_LATE_COL_GET(v) GET_BIT_VALUE(v, 12) +#define MAC_CMDCFG_SW_RESET_GET(v) GET_BIT_VALUE(v, 13) +#define MAC_CMDCFG_MHASH_SEL_GET(v) GET_BIT_VALUE(v, 14) +#define MAC_CMDCFG_LOOP_ENA_GET(v) GET_BIT_VALUE(v, 15) +#define MAC_CMDCFG_TX_ADDR_SEL_GET(v) (((v) >> 16) & 0x7) +#define MAC_CMDCFG_MAGIC_ENA_GET(v) GET_BIT_VALUE(v, 19) +#define MAC_CMDCFG_SLEEP_GET(v) GET_BIT_VALUE(v, 20) +#define MAC_CMDCFG_WAKEUP_GET(v) GET_BIT_VALUE(v, 21) +#define MAC_CMDCFG_XOFF_GEN_GET(v) GET_BIT_VALUE(v, 22) +#define MAC_CMDCFG_CNTL_FRM_ENA_GET(v) GET_BIT_VALUE(v, 23) +#define MAC_CMDCFG_NO_LGTH_CHECK_GET(v) GET_BIT_VALUE(v, 24) +#define MAC_CMDCFG_ENA_10_GET(v) GET_BIT_VALUE(v, 25) +#define MAC_CMDCFG_RX_ERR_DISC_GET(v) GET_BIT_VALUE(v, 26) +#define MAC_CMDCFG_DISABLE_READ_TIMEOUT_GET(v) GET_BIT_VALUE(v, 27) +#define MAC_CMDCFG_CNT_RESET_GET(v) GET_BIT_VALUE(v, 31) + +/* MDIO registers within MAC register Space + */ +struct altera_tse_mdio { + u32 control; /* PHY device operation control register */ + u32 status; /* PHY device operation status register */ + u32 phy_id1; /* Bits 31:16 of PHY identifier */ + u32 phy_id2; /* Bits 15:0 of PHY identifier */ + u32 auto_negotiation_advertisement; /* Auto-negotiation + * advertisement + * register + */ + u32 remote_partner_base_page_ability; + + u32 reg6; + u32 reg7; + u32 reg8; + u32 reg9; + u32 rega; + u32 regb; + u32 regc; + u32 regd; + u32 rege; + u32 regf; + u32 reg10; + u32 reg11; + u32 reg12; + u32 reg13; + u32 reg14; + u32 reg15; + u32 reg16; + u32 reg17; + u32 reg18; + u32 reg19; + u32 reg1a; + u32 reg1b; + u32 reg1c; + u32 reg1d; + u32 reg1e; + u32 reg1f; +}; + +/* MAC register Space. Note that some of these registers may or may not be + * present depending upon options chosen by the user when the core was + * configured and built. Please consult the Altera Triple Speed Ethernet User + * Guide for details. + */ +struct altera_tse_mac { + /* Bits 15:0: MegaCore function revision (0x0800). Bit 31:16: Customer + * specific revision + */ + u32 megacore_revision; + /* Provides a memory location for user applications to test the device + * memory operation. + */ + u32 scratch_pad; + /* The host processor uses this register to control and configure the + * MAC block + */ + u32 command_config; + /* 32-bit primary MAC address word 0 bits 0 to 31 of the primary + * MAC address + */ + u32 mac_addr_0; + /* 32-bit primary MAC address word 1 bits 32 to 47 of the primary + * MAC address + */ + u32 mac_addr_1; + /* 14-bit maximum frame length. The MAC receive logic */ + u32 frm_length; + /* The pause quanta is used in each pause frame sent to a remote + * Ethernet device, in increments of 512 Ethernet bit times + */ + u32 pause_quanta; + /* 12-bit receive FIFO section-empty threshold */ + u32 rx_section_empty; + /* 12-bit receive FIFO section-full threshold */ + u32 rx_section_full; + /* 12-bit transmit FIFO section-empty threshold */ + u32 tx_section_empty; + /* 12-bit transmit FIFO section-full threshold */ + u32 tx_section_full; + /* 12-bit receive FIFO almost-empty threshold */ + u32 rx_almost_empty; + /* 12-bit receive FIFO almost-full threshold */ + u32 rx_almost_full; + /* 12-bit transmit FIFO almost-empty threshold */ + u32 tx_almost_empty; + /* 12-bit transmit FIFO almost-full threshold */ + u32 tx_almost_full; + /* MDIO address of PHY Device 0. Bits 0 to 4 hold a 5-bit PHY address */ + u32 mdio_phy0_addr; + /* MDIO address of PHY Device 1. Bits 0 to 4 hold a 5-bit PHY address */ + u32 mdio_phy1_addr; + + /* Bit[15:0]—16-bit holdoff quanta */ + u32 holdoff_quant; + + /* only if 100/1000 BaseX PCS, reserved otherwise */ + u32 reserved1[5]; + + /* Minimum IPG between consecutive transmit frame in terms of bytes */ + u32 tx_ipg_length; + + /* IEEE 802.3 oEntity Managed Object Support */ + + /* The MAC addresses */ + u32 mac_id_1; + u32 mac_id_2; + + /* Number of frames transmitted without error including pause frames */ + u32 frames_transmitted_ok; + /* Number of frames received without error including pause frames */ + u32 frames_received_ok; + /* Number of frames received with a CRC error */ + u32 frames_check_sequence_errors; + /* Frame received with an alignment error */ + u32 alignment_errors; + /* Sum of payload and padding octets of frames transmitted without + * error + */ + u32 octets_transmitted_ok; + /* Sum of payload and padding octets of frames received without error */ + u32 octets_received_ok; + + /* IEEE 802.3 oPausedEntity Managed Object Support */ + + /* Number of transmitted pause frames */ + u32 tx_pause_mac_ctrl_frames; + /* Number of Received pause frames */ + u32 rx_pause_mac_ctrl_frames; + + /* IETF MIB (MIB-II) Object Support */ + + /* Number of frames received with error */ + u32 if_in_errors; + /* Number of frames transmitted with error */ + u32 if_out_errors; + /* Number of valid received unicast frames */ + u32 if_in_ucast_pkts; + /* Number of valid received multicasts frames (without pause) */ + u32 if_in_multicast_pkts; + /* Number of valid received broadcast frames */ + u32 if_in_broadcast_pkts; + u32 if_out_discards; + /* The number of valid unicast frames transmitted */ + u32 if_out_ucast_pkts; + /* The number of valid multicast frames transmitted, + * excluding pause frames + */ + u32 if_out_multicast_pkts; + u32 if_out_broadcast_pkts; + + /* IETF RMON MIB Object Support */ + + /* Counts the number of dropped packets due to internal errors + * of the MAC client. + */ + u32 ether_stats_drop_events; + /* Total number of bytes received. Good and bad frames. */ + u32 ether_stats_octets; + /* Total number of packets received. Counts good and bad packets. */ + u32 ether_stats_pkts; + /* Number of packets received with less than 64 bytes. */ + u32 ether_stats_undersize_pkts; + /* The number of frames received that are longer than the + * value configured in the frm_length register + */ + u32 ether_stats_oversize_pkts; + /* Number of received packet with 64 bytes */ + u32 ether_stats_pkts_64_octets; + /* Frames (good and bad) with 65 to 127 bytes */ + u32 ether_stats_pkts_65to127_octets; + /* Frames (good and bad) with 128 to 255 bytes */ + u32 ether_stats_pkts_128to255_octets; + /* Frames (good and bad) with 256 to 511 bytes */ + u32 ether_stats_pkts_256to511_octets; + /* Frames (good and bad) with 512 to 1023 bytes */ + u32 ether_stats_pkts_512to1023_octets; + /* Frames (good and bad) with 1024 to 1518 bytes */ + u32 ether_stats_pkts_1024to1518_octets; + + /* Any frame length from 1519 to the maximum length configured in the + * frm_length register, if it is greater than 1518 + */ + u32 ether_stats_pkts_1519tox_octets; + /* Too long frames with CRC error */ + u32 ether_stats_jabbers; + /* Too short frames with CRC error */ + u32 ether_stats_fragments; + + u32 reserved2; + + /* FIFO control register */ + u32 tx_cmd_stat; + u32 rx_cmd_stat; + + /* Extended Statistics Counters */ + u32 msb_octets_transmitted_ok; + u32 msb_octets_received_ok; + u32 msb_ether_stats_octets; + + u32 reserved3; + + /* Multicast address resolution table, mapped in the controller address + * space + */ + u32 hash_table[64]; + + /* Registers 0 to 31 within PHY device 0/1 connected to the MDIO PHY + * management interface + */ + struct altera_tse_mdio mdio_phy0; + struct altera_tse_mdio mdio_phy1; + + /* 4 Supplemental MAC Addresses */ + u32 supp_mac_addr_0_0; + u32 supp_mac_addr_0_1; + u32 supp_mac_addr_1_0; + u32 supp_mac_addr_1_1; + u32 supp_mac_addr_2_0; + u32 supp_mac_addr_2_1; + u32 supp_mac_addr_3_0; + u32 supp_mac_addr_3_1; + + u32 reserved4[8]; + + /* IEEE 1588v2 Feature */ + u32 tx_period; + u32 tx_adjust_fns; + u32 tx_adjust_ns; + u32 rx_period; + u32 rx_adjust_fns; + u32 rx_adjust_ns; + + u32 reserved5[42]; +}; + +/* Transmit and Receive Command Registers Bit Definitions + */ +#define ALTERA_TSE_TX_CMD_STAT_OMIT_CRC BIT(17) +#define ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 BIT(18) +#define ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16 BIT(25) + +/* Wrapper around a pointer to a socket buffer, + * so a DMA handle can be stored along with the buffer + */ +struct tse_buffer { + struct list_head lh; + struct sk_buff *skb; + dma_addr_t dma_addr; + u32 len; + int mapped_as_page; +}; + +struct altera_tse_private; + +#define ALTERA_DTYPE_SGDMA 1 +#define ALTERA_DTYPE_MSGDMA 2 + +/* standard DMA interface for SGDMA and MSGDMA */ +struct altera_dmaops { + int altera_dtype; + int dmamask; + void (*reset_dma)(struct altera_tse_private *); + void (*enable_txirq)(struct altera_tse_private *); + void (*enable_rxirq)(struct altera_tse_private *); + void (*disable_txirq)(struct altera_tse_private *); + void (*disable_rxirq)(struct altera_tse_private *); + void (*clear_txirq)(struct altera_tse_private *); + void (*clear_rxirq)(struct altera_tse_private *); + int (*tx_buffer)(struct altera_tse_private *, struct tse_buffer *); + u32 (*tx_completions)(struct altera_tse_private *); + int (*add_rx_desc)(struct altera_tse_private *, struct tse_buffer *); + u32 (*get_rx_status)(struct altera_tse_private *); + int (*init_dma)(struct altera_tse_private *); + void (*uninit_dma)(struct altera_tse_private *); +}; + +/* This structure is private to each device. + */ +struct altera_tse_private { + struct net_device *dev; + struct device *device; + struct napi_struct napi; + + /* MAC address space */ + struct altera_tse_mac __iomem *mac_dev; + + /* TSE Revision */ + u32 revision; + + /* mSGDMA Rx Dispatcher address space */ + void __iomem *rx_dma_csr; + void __iomem *rx_dma_desc; + void __iomem *rx_dma_resp; + + /* mSGDMA Tx Dispatcher address space */ + void __iomem *tx_dma_csr; + void __iomem *tx_dma_desc; + + /* Rx buffers queue */ + struct tse_buffer *rx_ring; + u32 rx_cons; + u32 rx_prod; + u32 rx_ring_size; + u32 rx_dma_buf_sz; + + /* Tx ring buffer */ + struct tse_buffer *tx_ring; + u32 tx_prod; + u32 tx_cons; + u32 tx_ring_size; + + /* Interrupts */ + u32 tx_irq; + u32 rx_irq; + + /* RX/TX MAC FIFO configs */ + u32 tx_fifo_depth; + u32 rx_fifo_depth; + u32 max_mtu; + + /* Hash filter settings */ + u32 hash_filter; + u32 added_unicast; + + /* Descriptor memory info for managing SGDMA */ + u32 txdescmem; + u32 rxdescmem; + dma_addr_t rxdescmem_busaddr; + dma_addr_t txdescmem_busaddr; + u32 txctrlreg; + u32 rxctrlreg; + dma_addr_t rxdescphys; + dma_addr_t txdescphys; + + struct list_head txlisthd; + struct list_head rxlisthd; + + /* MAC command_config register protection */ + spinlock_t mac_cfg_lock; + /* Tx path protection */ + spinlock_t tx_lock; + /* Rx DMA & interrupt control protection */ + spinlock_t rxdma_irq_lock; + + /* PHY */ + int phy_addr; /* PHY's MDIO address, -1 for autodetection */ + phy_interface_t phy_iface; + struct mii_bus *mdio; + struct phy_device *phydev; + int oldspeed; + int oldduplex; + int oldlink; + + /* ethtool msglvl option */ + u32 msg_enable; + + struct altera_dmaops *dmaops; +}; + +/* Function prototypes + */ +void altera_tse_set_ethtool_ops(struct net_device *); + +#endif /* __ALTERA_TSE_H__ */ diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c new file mode 100644 index 000000000000..6006ef275107 --- /dev/null +++ b/drivers/net/ethernet/altera/altera_tse_main.c @@ -0,0 +1,1543 @@ +/* Altera Triple-Speed Ethernet MAC driver + * Copyright (C) 2008-2014 Altera Corporation. All rights reserved + * + * Contributors: + * Dalon Westergreen + * Thomas Chou + * Ian Abbott + * Yuriy Kozlov + * Tobias Klauser + * Andriy Smolskyy + * Roman Bulgakov + * Dmytro Mytarchuk + * Matthew Gerlach + * + * Original driver contributed by SLS. + * Major updates contributed by GlobalLogic + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/atomic.h> +#include <linux/delay.h> +#include <linux/etherdevice.h> +#include <linux/if_vlan.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/of_device.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/phy.h> +#include <linux/platform_device.h> +#include <linux/skbuff.h> +#include <asm/cacheflush.h> + +#include "altera_utils.h" +#include "altera_tse.h" +#include "altera_sgdma.h" +#include "altera_msgdma.h" + +static atomic_t instance_count = ATOMIC_INIT(~0); +/* Module parameters */ +static int debug = -1; +module_param(debug, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); + +static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | + NETIF_MSG_LINK | NETIF_MSG_IFUP | + NETIF_MSG_IFDOWN); + +#define RX_DESCRIPTORS 64 +static int dma_rx_num = RX_DESCRIPTORS; +module_param(dma_rx_num, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dma_rx_num, "Number of descriptors in the RX list"); + +#define TX_DESCRIPTORS 64 +static int dma_tx_num = TX_DESCRIPTORS; +module_param(dma_tx_num, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(dma_tx_num, "Number of descriptors in the TX list"); + + +#define POLL_PHY (-1) + +/* Make sure DMA buffer size is larger than the max frame size + * plus some alignment offset and a VLAN header. If the max frame size is + * 1518, a VLAN header would be additional 4 bytes and additional + * headroom for alignment is 2 bytes, 2048 is just fine. + */ +#define ALTERA_RXDMABUFFER_SIZE 2048 + +/* Allow network stack to resume queueing packets after we've + * finished transmitting at least 1/4 of the packets in the queue. + */ +#define TSE_TX_THRESH(x) (x->tx_ring_size / 4) + +#define TXQUEUESTOP_THRESHHOLD 2 + +static struct of_device_id altera_tse_ids[]; + +static inline u32 tse_tx_avail(struct altera_tse_private *priv) +{ + return priv->tx_cons + priv->tx_ring_size - priv->tx_prod - 1; +} + +/* MDIO specific functions + */ +static int altera_tse_mdio_read(struct mii_bus *bus, int mii_id, int regnum) +{ + struct altera_tse_mac *mac = (struct altera_tse_mac *)bus->priv; + unsigned int *mdio_regs = (unsigned int *)&mac->mdio_phy0; + u32 data; + + /* set MDIO address */ + iowrite32((mii_id & 0x1f), &mac->mdio_phy0_addr); + + /* get the data */ + data = ioread32(&mdio_regs[regnum]) & 0xffff; + return data; +} + +static int altera_tse_mdio_write(struct mii_bus *bus, int mii_id, int regnum, + u16 value) +{ + struct altera_tse_mac *mac = (struct altera_tse_mac *)bus->priv; + unsigned int *mdio_regs = (unsigned int *)&mac->mdio_phy0; + + /* set MDIO address */ + iowrite32((mii_id & 0x1f), &mac->mdio_phy0_addr); + + /* write the data */ + iowrite32((u32) value, &mdio_regs[regnum]); + return 0; +} + +static int altera_tse_mdio_create(struct net_device *dev, unsigned int id) +{ + struct altera_tse_private *priv = netdev_priv(dev); + int ret; + int i; + struct device_node *mdio_node = NULL; + struct mii_bus *mdio = NULL; + struct device_node *child_node = NULL; + + for_each_child_of_node(priv->device->of_node, child_node) { + if (of_device_is_compatible(child_node, "altr,tse-mdio")) { + mdio_node = child_node; + break; + } + } + + if (mdio_node) { + netdev_dbg(dev, "FOUND MDIO subnode\n"); + } else { + netdev_dbg(dev, "NO MDIO subnode\n"); + return 0; + } + + mdio = mdiobus_alloc(); + if (mdio == NULL) { + netdev_err(dev, "Error allocating MDIO bus\n"); + return -ENOMEM; + } + + mdio->name = ALTERA_TSE_RESOURCE_NAME; + mdio->read = &altera_tse_mdio_read; + mdio->write = &altera_tse_mdio_write; + snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id); + + mdio->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL); + if (mdio->irq == NULL) { + ret = -ENOMEM; + goto out_free_mdio; + } + for (i = 0; i < PHY_MAX_ADDR; i++) + mdio->irq[i] = PHY_POLL; + + mdio->priv = priv->mac_dev; + mdio->parent = priv->device; + + ret = of_mdiobus_register(mdio, mdio_node); + if (ret != 0) { + netdev_err(dev, "Cannot register MDIO bus %s\n", + mdio->id); + goto out_free_mdio_irq; + } + + if (netif_msg_drv(priv)) + netdev_info(dev, "MDIO bus %s: created\n", mdio->id); + + priv->mdio = mdio; + return 0; +out_free_mdio_irq: + kfree(mdio->irq); +out_free_mdio: + mdiobus_free(mdio); + mdio = NULL; + return ret; +} + +static void altera_tse_mdio_destroy(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + + if (priv->mdio == NULL) + return; + + if (netif_msg_drv(priv)) + netdev_info(dev, "MDIO bus %s: removed\n", + priv->mdio->id); + + mdiobus_unregister(priv->mdio); + kfree(priv->mdio->irq); + mdiobus_free(priv->mdio); + priv->mdio = NULL; +} + +static int tse_init_rx_buffer(struct altera_tse_private *priv, + struct tse_buffer *rxbuffer, int len) +{ + rxbuffer->skb = netdev_alloc_skb_ip_align(priv->dev, len); + if (!rxbuffer->skb) + return -ENOMEM; + + rxbuffer->dma_addr = dma_map_single(priv->device, rxbuffer->skb->data, + len, + DMA_FROM_DEVICE); + + if (dma_mapping_error(priv->device, rxbuffer->dma_addr)) { + netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); + dev_kfree_skb_any(rxbuffer->skb); + return -EINVAL; + } + rxbuffer->len = len; + return 0; +} + +static void tse_free_rx_buffer(struct altera_tse_private *priv, + struct tse_buffer *rxbuffer) +{ + struct sk_buff *skb = rxbuffer->skb; + dma_addr_t dma_addr = rxbuffer->dma_addr; + + if (skb != NULL) { + if (dma_addr) + dma_unmap_single(priv->device, dma_addr, + rxbuffer->len, + DMA_FROM_DEVICE); + dev_kfree_skb_any(skb); + rxbuffer->skb = NULL; + rxbuffer->dma_addr = 0; + } +} + +/* Unmap and free Tx buffer resources + */ +static void tse_free_tx_buffer(struct altera_tse_private *priv, + struct tse_buffer *buffer) +{ + if (buffer->dma_addr) { + if (buffer->mapped_as_page) + dma_unmap_page(priv->device, buffer->dma_addr, + buffer->len, DMA_TO_DEVICE); + else + dma_unmap_single(priv->device, buffer->dma_addr, + buffer->len, DMA_TO_DEVICE); + buffer->dma_addr = 0; + } + if (buffer->skb) { + dev_kfree_skb_any(buffer->skb); + buffer->skb = NULL; + } +} + +static int alloc_init_skbufs(struct altera_tse_private *priv) +{ + unsigned int rx_descs = priv->rx_ring_size; + unsigned int tx_descs = priv->tx_ring_size; + int ret = -ENOMEM; + int i; + + /* Create Rx ring buffer */ + priv->rx_ring = kcalloc(rx_descs, sizeof(struct tse_buffer), + GFP_KERNEL); + if (!priv->rx_ring) + goto err_rx_ring; + + /* Create Tx ring buffer */ + priv->tx_ring = kcalloc(tx_descs, sizeof(struct tse_buffer), + GFP_KERNEL); + if (!priv->tx_ring) + goto err_tx_ring; + + priv->tx_cons = 0; + priv->tx_prod = 0; + + /* Init Rx ring */ + for (i = 0; i < rx_descs; i++) { + ret = tse_init_rx_buffer(priv, &priv->rx_ring[i], + priv->rx_dma_buf_sz); + if (ret) + goto err_init_rx_buffers; + } + + priv->rx_cons = 0; + priv->rx_prod = 0; + + return 0; +err_init_rx_buffers: + while (--i >= 0) + tse_free_rx_buffer(priv, &priv->rx_ring[i]); + kfree(priv->tx_ring); +err_tx_ring: + kfree(priv->rx_ring); +err_rx_ring: + return ret; +} + +static void free_skbufs(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + unsigned int rx_descs = priv->rx_ring_size; + unsigned int tx_descs = priv->tx_ring_size; + int i; + + /* Release the DMA TX/RX socket buffers */ + for (i = 0; i < rx_descs; i++) + tse_free_rx_buffer(priv, &priv->rx_ring[i]); + for (i = 0; i < tx_descs; i++) + tse_free_tx_buffer(priv, &priv->tx_ring[i]); + + + kfree(priv->tx_ring); +} + +/* Reallocate the skb for the reception process + */ +static inline void tse_rx_refill(struct altera_tse_private *priv) +{ + unsigned int rxsize = priv->rx_ring_size; + unsigned int entry; + int ret; + + for (; priv->rx_cons - priv->rx_prod > 0; + priv->rx_prod++) { + entry = priv->rx_prod % rxsize; + if (likely(priv->rx_ring[entry].skb == NULL)) { + ret = tse_init_rx_buffer(priv, &priv->rx_ring[entry], + priv->rx_dma_buf_sz); + if (unlikely(ret != 0)) + break; + priv->dmaops->add_rx_desc(priv, &priv->rx_ring[entry]); + } + } +} + +/* Pull out the VLAN tag and fix up the packet + */ +static inline void tse_rx_vlan(struct net_device *dev, struct sk_buff *skb) +{ + struct ethhdr *eth_hdr; + u16 vid; + if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) && + !__vlan_get_tag(skb, &vid)) { + eth_hdr = (struct ethhdr *)skb->data; + memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); + skb_pull(skb, VLAN_HLEN); + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); + } +} + +/* Receive a packet: retrieve and pass over to upper levels + */ +static int tse_rx(struct altera_tse_private *priv, int limit) +{ + unsigned int count = 0; + unsigned int next_entry; + struct sk_buff *skb; + unsigned int entry = priv->rx_cons % priv->rx_ring_size; + u32 rxstatus; + u16 pktlength; + u16 pktstatus; + + while ((rxstatus = priv->dmaops->get_rx_status(priv)) != 0) { + pktstatus = rxstatus >> 16; + pktlength = rxstatus & 0xffff; + + if ((pktstatus & 0xFF) || (pktlength == 0)) + netdev_err(priv->dev, + "RCV pktstatus %08X pktlength %08X\n", + pktstatus, pktlength); + + count++; + next_entry = (++priv->rx_cons) % priv->rx_ring_size; + + skb = priv->rx_ring[entry].skb; + if (unlikely(!skb)) { + netdev_err(priv->dev, + "%s: Inconsistent Rx descriptor chain\n", + __func__); + priv->dev->stats.rx_dropped++; + break; + } + priv->rx_ring[entry].skb = NULL; + + skb_put(skb, pktlength); + + /* make cache consistent with receive packet buffer */ + dma_sync_single_for_cpu(priv->device, + priv->rx_ring[entry].dma_addr, + priv->rx_ring[entry].len, + DMA_FROM_DEVICE); + + dma_unmap_single(priv->device, priv->rx_ring[entry].dma_addr, + priv->rx_ring[entry].len, DMA_FROM_DEVICE); + + if (netif_msg_pktdata(priv)) { + netdev_info(priv->dev, "frame received %d bytes\n", + pktlength); + print_hex_dump(KERN_ERR, "data: ", DUMP_PREFIX_OFFSET, + 16, 1, skb->data, pktlength, true); + } + + tse_rx_vlan(priv->dev, skb); + + skb->protocol = eth_type_trans(skb, priv->dev); + skb_checksum_none_assert(skb); + + napi_gro_receive(&priv->napi, skb); + + priv->dev->stats.rx_packets++; + priv->dev->stats.rx_bytes += pktlength; + + entry = next_entry; + } + + tse_rx_refill(priv); + return count; +} + +/* Reclaim resources after transmission completes + */ +static int tse_tx_complete(struct altera_tse_private *priv) +{ + unsigned int txsize = priv->tx_ring_size; + u32 ready; + unsigned int entry; + struct tse_buffer *tx_buff; + int txcomplete = 0; + + spin_lock(&priv->tx_lock); + + ready = priv->dmaops->tx_completions(priv); + + /* Free sent buffers */ + while (ready && (priv->tx_cons != priv->tx_prod)) { + entry = priv->tx_cons % txsize; + tx_buff = &priv->tx_ring[entry]; + + if (netif_msg_tx_done(priv)) + netdev_dbg(priv->dev, "%s: curr %d, dirty %d\n", + __func__, priv->tx_prod, priv->tx_cons); + + if (likely(tx_buff->skb)) + priv->dev->stats.tx_packets++; + + tse_free_tx_buffer(priv, tx_buff); + priv->tx_cons++; + + txcomplete++; + ready--; + } + + if (unlikely(netif_queue_stopped(priv->dev) && + tse_tx_avail(priv) > TSE_TX_THRESH(priv))) { + netif_tx_lock(priv->dev); + if (netif_queue_stopped(priv->dev) && + tse_tx_avail(priv) > TSE_TX_THRESH(priv)) { + if (netif_msg_tx_done(priv)) + netdev_dbg(priv->dev, "%s: restart transmit\n", + __func__); + netif_wake_queue(priv->dev); + } + netif_tx_unlock(priv->dev); + } + + spin_unlock(&priv->tx_lock); + return txcomplete; +} + +/* NAPI polling function + */ +static int tse_poll(struct napi_struct *napi, int budget) +{ + struct altera_tse_private *priv = + container_of(napi, struct altera_tse_private, napi); + int rxcomplete = 0; + int txcomplete = 0; + unsigned long int flags; + + txcomplete = tse_tx_complete(priv); + + rxcomplete = tse_rx(priv, budget); + + if (rxcomplete >= budget || txcomplete > 0) + return rxcomplete; + + napi_gro_flush(napi, false); + __napi_complete(napi); + + netdev_dbg(priv->dev, + "NAPI Complete, did %d packets with budget %d\n", + txcomplete+rxcomplete, budget); + + spin_lock_irqsave(&priv->rxdma_irq_lock, flags); + priv->dmaops->enable_rxirq(priv); + priv->dmaops->enable_txirq(priv); + spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); + return rxcomplete + txcomplete; +} + +/* DMA TX & RX FIFO interrupt routing + */ +static irqreturn_t altera_isr(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct altera_tse_private *priv; + unsigned long int flags; + + + if (unlikely(!dev)) { + pr_err("%s: invalid dev pointer\n", __func__); + return IRQ_NONE; + } + priv = netdev_priv(dev); + + /* turn off desc irqs and enable napi rx */ + spin_lock_irqsave(&priv->rxdma_irq_lock, flags); + + if (likely(napi_schedule_prep(&priv->napi))) { + priv->dmaops->disable_rxirq(priv); + priv->dmaops->disable_txirq(priv); + __napi_schedule(&priv->napi); + } + + /* reset IRQs */ + priv->dmaops->clear_rxirq(priv); + priv->dmaops->clear_txirq(priv); + + spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); + + return IRQ_HANDLED; +} + +/* Transmit a packet (called by the kernel). Dispatches + * either the SGDMA method for transmitting or the + * MSGDMA method, assumes no scatter/gather support, + * implying an assumption that there's only one + * physically contiguous fragment starting at + * skb->data, for length of skb_headlen(skb). + */ +static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + unsigned int txsize = priv->tx_ring_size; + unsigned int entry; + struct tse_buffer *buffer = NULL; + int nfrags = skb_shinfo(skb)->nr_frags; + unsigned int nopaged_len = skb_headlen(skb); + enum netdev_tx ret = NETDEV_TX_OK; + dma_addr_t dma_addr; + int txcomplete = 0; + + spin_lock_bh(&priv->tx_lock); + + if (unlikely(tse_tx_avail(priv) < nfrags + 1)) { + if (!netif_queue_stopped(dev)) { + netif_stop_queue(dev); + /* This is a hard error, log it. */ + netdev_err(priv->dev, + "%s: Tx list full when queue awake\n", + __func__); + } + ret = NETDEV_TX_BUSY; + goto out; + } + + /* Map the first skb fragment */ + entry = priv->tx_prod % txsize; + buffer = &priv->tx_ring[entry]; + + dma_addr = dma_map_single(priv->device, skb->data, nopaged_len, + DMA_TO_DEVICE); + if (dma_mapping_error(priv->device, dma_addr)) { + netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); + ret = NETDEV_TX_OK; + goto out; + } + + buffer->skb = skb; + buffer->dma_addr = dma_addr; + buffer->len = nopaged_len; + + /* Push data out of the cache hierarchy into main memory */ + dma_sync_single_for_device(priv->device, buffer->dma_addr, + buffer->len, DMA_TO_DEVICE); + + txcomplete = priv->dmaops->tx_buffer(priv, buffer); + + skb_tx_timestamp(skb); + + priv->tx_prod++; + dev->stats.tx_bytes += skb->len; + + if (unlikely(tse_tx_avail(priv) <= TXQUEUESTOP_THRESHHOLD)) { + if (netif_msg_hw(priv)) + netdev_dbg(priv->dev, "%s: stop transmitted packets\n", + __func__); + netif_stop_queue(dev); + } + +out: + spin_unlock_bh(&priv->tx_lock); + + return ret; +} + +/* Called every time the controller might need to be made + * aware of new link state. The PHY code conveys this + * information through variables in the phydev structure, and this + * function converts those variables into the appropriate + * register values, and can bring down the device if needed. + */ +static void altera_tse_adjust_link(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct phy_device *phydev = priv->phydev; + int new_state = 0; + + /* only change config if there is a link */ + spin_lock(&priv->mac_cfg_lock); + if (phydev->link) { + /* Read old config */ + u32 cfg_reg = ioread32(&priv->mac_dev->command_config); + + /* Check duplex */ + if (phydev->duplex != priv->oldduplex) { + new_state = 1; + if (!(phydev->duplex)) + cfg_reg |= MAC_CMDCFG_HD_ENA; + else + cfg_reg &= ~MAC_CMDCFG_HD_ENA; + + netdev_dbg(priv->dev, "%s: Link duplex = 0x%x\n", + dev->name, phydev->duplex); + + priv->oldduplex = phydev->duplex; + } + + /* Check speed */ + if (phydev->speed != priv->oldspeed) { + new_state = 1; + switch (phydev->speed) { + case 1000: + cfg_reg |= MAC_CMDCFG_ETH_SPEED; + cfg_reg &= ~MAC_CMDCFG_ENA_10; + break; + case 100: + cfg_reg &= ~MAC_CMDCFG_ETH_SPEED; + cfg_reg &= ~MAC_CMDCFG_ENA_10; + break; + case 10: + cfg_reg &= ~MAC_CMDCFG_ETH_SPEED; + cfg_reg |= MAC_CMDCFG_ENA_10; + break; + default: + if (netif_msg_link(priv)) + netdev_warn(dev, "Speed (%d) is not 10/100/1000!\n", + phydev->speed); + break; + } + priv->oldspeed = phydev->speed; + } + iowrite32(cfg_reg, &priv->mac_dev->command_config); + + if (!priv->oldlink) { + new_state = 1; + priv->oldlink = 1; + } + } else if (priv->oldlink) { + new_state = 1; + priv->oldlink = 0; + priv->oldspeed = 0; + priv->oldduplex = -1; + } + + if (new_state && netif_msg_link(priv)) + phy_print_status(phydev); + + spin_unlock(&priv->mac_cfg_lock); +} +static struct phy_device *connect_local_phy(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct phy_device *phydev = NULL; + char phy_id_fmt[MII_BUS_ID_SIZE + 3]; + int ret; + + if (priv->phy_addr != POLL_PHY) { + snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, + priv->mdio->id, priv->phy_addr); + + netdev_dbg(dev, "trying to attach to %s\n", phy_id_fmt); + + phydev = phy_connect(dev, phy_id_fmt, &altera_tse_adjust_link, + priv->phy_iface); + if (IS_ERR(phydev)) + netdev_err(dev, "Could not attach to PHY\n"); + + } else { + phydev = phy_find_first(priv->mdio); + if (phydev == NULL) { + netdev_err(dev, "No PHY found\n"); + return phydev; + } + + ret = phy_connect_direct(dev, phydev, &altera_tse_adjust_link, + priv->phy_iface); + if (ret != 0) { + netdev_err(dev, "Could not attach to PHY\n"); + phydev = NULL; + } + } + return phydev; +} + +/* Initialize driver's PHY state, and attach to the PHY + */ +static int init_phy(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct phy_device *phydev; + struct device_node *phynode; + + priv->oldlink = 0; + priv->oldspeed = 0; + priv->oldduplex = -1; + + phynode = of_parse_phandle(priv->device->of_node, "phy-handle", 0); + + if (!phynode) { + netdev_dbg(dev, "no phy-handle found\n"); + if (!priv->mdio) { + netdev_err(dev, + "No phy-handle nor local mdio specified\n"); + return -ENODEV; + } + phydev = connect_local_phy(dev); + } else { + netdev_dbg(dev, "phy-handle found\n"); + phydev = of_phy_connect(dev, phynode, + &altera_tse_adjust_link, 0, priv->phy_iface); + } + + if (!phydev) { + netdev_err(dev, "Could not find the PHY\n"); + return -ENODEV; + } + + /* Stop Advertising 1000BASE Capability if interface is not GMII + * Note: Checkpatch throws CHECKs for the camel case defines below, + * it's ok to ignore. + */ + if ((priv->phy_iface == PHY_INTERFACE_MODE_MII) || + (priv->phy_iface == PHY_INTERFACE_MODE_RMII)) + phydev->advertising &= ~(SUPPORTED_1000baseT_Half | + SUPPORTED_1000baseT_Full); + + /* Broken HW is sometimes missing the pull-up resistor on the + * MDIO line, which results in reads to non-existent devices returning + * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent + * device as well. + * Note: phydev->phy_id is the result of reading the UID PHY registers. + */ + if (phydev->phy_id == 0) { + netdev_err(dev, "Bad PHY UID 0x%08x\n", phydev->phy_id); + phy_disconnect(phydev); + return -ENODEV; + } + + netdev_dbg(dev, "attached to PHY %d UID 0x%08x Link = %d\n", + phydev->addr, phydev->phy_id, phydev->link); + + priv->phydev = phydev; + return 0; +} + +static void tse_update_mac_addr(struct altera_tse_private *priv, u8 *addr) +{ + struct altera_tse_mac *mac = priv->mac_dev; + u32 msb; + u32 lsb; + + msb = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; + lsb = ((addr[5] << 8) | addr[4]) & 0xffff; + + /* Set primary MAC address */ + iowrite32(msb, &mac->mac_addr_0); + iowrite32(lsb, &mac->mac_addr_1); +} + +/* MAC software reset. + * When reset is triggered, the MAC function completes the current + * transmission or reception, and subsequently disables the transmit and + * receive logic, flushes the receive FIFO buffer, and resets the statistics + * counters. + */ +static int reset_mac(struct altera_tse_private *priv) +{ + void __iomem *cmd_cfg_reg = &priv->mac_dev->command_config; + int counter; + u32 dat; + + dat = ioread32(cmd_cfg_reg); + dat &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); + dat |= MAC_CMDCFG_SW_RESET | MAC_CMDCFG_CNT_RESET; + iowrite32(dat, cmd_cfg_reg); + + counter = 0; + while (counter++ < ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { + if (tse_bit_is_clear(cmd_cfg_reg, MAC_CMDCFG_SW_RESET)) + break; + udelay(1); + } + + if (counter >= ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { + dat = ioread32(cmd_cfg_reg); + dat &= ~MAC_CMDCFG_SW_RESET; + iowrite32(dat, cmd_cfg_reg); + return -1; + } + return 0; +} + +/* Initialize MAC core registers +*/ +static int init_mac(struct altera_tse_private *priv) +{ + struct altera_tse_mac *mac = priv->mac_dev; + unsigned int cmd = 0; + u32 frm_length; + + /* Setup Rx FIFO */ + iowrite32(priv->rx_fifo_depth - ALTERA_TSE_RX_SECTION_EMPTY, + &mac->rx_section_empty); + iowrite32(ALTERA_TSE_RX_SECTION_FULL, &mac->rx_section_full); + iowrite32(ALTERA_TSE_RX_ALMOST_EMPTY, &mac->rx_almost_empty); + iowrite32(ALTERA_TSE_RX_ALMOST_FULL, &mac->rx_almost_full); + + /* Setup Tx FIFO */ + iowrite32(priv->tx_fifo_depth - ALTERA_TSE_TX_SECTION_EMPTY, + &mac->tx_section_empty); + iowrite32(ALTERA_TSE_TX_SECTION_FULL, &mac->tx_section_full); + iowrite32(ALTERA_TSE_TX_ALMOST_EMPTY, &mac->tx_almost_empty); + iowrite32(ALTERA_TSE_TX_ALMOST_FULL, &mac->tx_almost_full); + + /* MAC Address Configuration */ + tse_update_mac_addr(priv, priv->dev->dev_addr); + + /* MAC Function Configuration */ + frm_length = ETH_HLEN + priv->dev->mtu + ETH_FCS_LEN; + iowrite32(frm_length, &mac->frm_length); + iowrite32(ALTERA_TSE_TX_IPG_LENGTH, &mac->tx_ipg_length); + + /* Disable RX/TX shift 16 for alignment of all received frames on 16-bit + * start address + */ + tse_clear_bit(&mac->rx_cmd_stat, ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16); + tse_clear_bit(&mac->tx_cmd_stat, ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 | + ALTERA_TSE_TX_CMD_STAT_OMIT_CRC); + + /* Set the MAC options */ + cmd = ioread32(&mac->command_config); + cmd |= MAC_CMDCFG_PAD_EN; /* Padding Removal on Receive */ + cmd &= ~MAC_CMDCFG_CRC_FWD; /* CRC Removal */ + cmd |= MAC_CMDCFG_RX_ERR_DISC; /* Automatically discard frames + * with CRC errors + */ + cmd |= MAC_CMDCFG_CNTL_FRM_ENA; + cmd &= ~MAC_CMDCFG_TX_ENA; + cmd &= ~MAC_CMDCFG_RX_ENA; + iowrite32(cmd, &mac->command_config); + + if (netif_msg_hw(priv)) + dev_dbg(priv->device, + "MAC post-initialization: CMD_CONFIG = 0x%08x\n", cmd); + + return 0; +} + +/* Start/stop MAC transmission logic + */ +static void tse_set_mac(struct altera_tse_private *priv, bool enable) +{ + struct altera_tse_mac *mac = priv->mac_dev; + u32 value = ioread32(&mac->command_config); + + if (enable) + value |= MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA; + else + value &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); + + iowrite32(value, &mac->command_config); +} + +/* Change the MTU + */ +static int tse_change_mtu(struct net_device *dev, int new_mtu) +{ + struct altera_tse_private *priv = netdev_priv(dev); + unsigned int max_mtu = priv->max_mtu; + unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN; + + if (netif_running(dev)) { + netdev_err(dev, "must be stopped to change its MTU\n"); + return -EBUSY; + } + + if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) { + netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu); + return -EINVAL; + } + + dev->mtu = new_mtu; + netdev_update_features(dev); + + return 0; +} + +static void altera_tse_set_mcfilter(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct altera_tse_mac *mac = (struct altera_tse_mac *)priv->mac_dev; + int i; + struct netdev_hw_addr *ha; + + /* clear the hash filter */ + for (i = 0; i < 64; i++) + iowrite32(0, &(mac->hash_table[i])); + + netdev_for_each_mc_addr(ha, dev) { + unsigned int hash = 0; + int mac_octet; + + for (mac_octet = 5; mac_octet >= 0; mac_octet--) { + unsigned char xor_bit = 0; + unsigned char octet = ha->addr[mac_octet]; + unsigned int bitshift; + + for (bitshift = 0; bitshift < 8; bitshift++) + xor_bit ^= ((octet >> bitshift) & 0x01); + + hash = (hash << 1) | xor_bit; + } + iowrite32(1, &(mac->hash_table[hash])); + } +} + + +static void altera_tse_set_mcfilterall(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct altera_tse_mac *mac = (struct altera_tse_mac *)priv->mac_dev; + int i; + + /* set the hash filter */ + for (i = 0; i < 64; i++) + iowrite32(1, &(mac->hash_table[i])); +} + +/* Set or clear the multicast filter for this adaptor + */ +static void tse_set_rx_mode_hashfilter(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct altera_tse_mac *mac = priv->mac_dev; + + spin_lock(&priv->mac_cfg_lock); + + if (dev->flags & IFF_PROMISC) + tse_set_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN); + + if (dev->flags & IFF_ALLMULTI) + altera_tse_set_mcfilterall(dev); + else + altera_tse_set_mcfilter(dev); + + spin_unlock(&priv->mac_cfg_lock); +} + +/* Set or clear the multicast filter for this adaptor + */ +static void tse_set_rx_mode(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + struct altera_tse_mac *mac = priv->mac_dev; + + spin_lock(&priv->mac_cfg_lock); + + if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || + !netdev_mc_empty(dev) || !netdev_uc_empty(dev)) + tse_set_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN); + else + tse_clear_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN); + + spin_unlock(&priv->mac_cfg_lock); +} + +/* Open and initialize the interface + */ +static int tse_open(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + int ret = 0; + int i; + unsigned long int flags; + + /* Reset and configure TSE MAC and probe associated PHY */ + ret = priv->dmaops->init_dma(priv); + if (ret != 0) { + netdev_err(dev, "Cannot initialize DMA\n"); + goto phy_error; + } + + if (netif_msg_ifup(priv)) + netdev_warn(dev, "device MAC address %pM\n", + dev->dev_addr); + + if ((priv->revision < 0xd00) || (priv->revision > 0xe00)) + netdev_warn(dev, "TSE revision %x\n", priv->revision); + + spin_lock(&priv->mac_cfg_lock); + ret = reset_mac(priv); + if (ret) + netdev_err(dev, "Cannot reset MAC core (error: %d)\n", ret); + + ret = init_mac(priv); + spin_unlock(&priv->mac_cfg_lock); + if (ret) { + netdev_err(dev, "Cannot init MAC core (error: %d)\n", ret); + goto alloc_skbuf_error; + } + + priv->dmaops->reset_dma(priv); + + /* Create and initialize the TX/RX descriptors chains. */ + priv->rx_ring_size = dma_rx_num; + priv->tx_ring_size = dma_tx_num; + ret = alloc_init_skbufs(priv); + if (ret) { + netdev_err(dev, "DMA descriptors initialization failed\n"); + goto alloc_skbuf_error; + } + + + /* Register RX interrupt */ + ret = request_irq(priv->rx_irq, altera_isr, IRQF_SHARED, + dev->name, dev); + if (ret) { + netdev_err(dev, "Unable to register RX interrupt %d\n", + priv->rx_irq); + goto init_error; + } + + /* Register TX interrupt */ + ret = request_irq(priv->tx_irq, altera_isr, IRQF_SHARED, + dev->name, dev); + if (ret) { + netdev_err(dev, "Unable to register TX interrupt %d\n", + priv->tx_irq); + goto tx_request_irq_error; + } + + /* Enable DMA interrupts */ + spin_lock_irqsave(&priv->rxdma_irq_lock, flags); + priv->dmaops->enable_rxirq(priv); + priv->dmaops->enable_txirq(priv); + + /* Setup RX descriptor chain */ + for (i = 0; i < priv->rx_ring_size; i++) + priv->dmaops->add_rx_desc(priv, &priv->rx_ring[i]); + + spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); + + /* Start MAC Rx/Tx */ + spin_lock(&priv->mac_cfg_lock); + tse_set_mac(priv, true); + spin_unlock(&priv->mac_cfg_lock); + + if (priv->phydev) + phy_start(priv->phydev); + + napi_enable(&priv->napi); + netif_start_queue(dev); + + return 0; + +tx_request_irq_error: + free_irq(priv->rx_irq, dev); +init_error: + free_skbufs(dev); +alloc_skbuf_error: + if (priv->phydev) { + phy_disconnect(priv->phydev); + priv->phydev = NULL; + } +phy_error: + return ret; +} + +/* Stop TSE MAC interface and put the device in an inactive state + */ +static int tse_shutdown(struct net_device *dev) +{ + struct altera_tse_private *priv = netdev_priv(dev); + int ret; + unsigned long int flags; + + /* Stop and disconnect the PHY */ + if (priv->phydev) { + phy_stop(priv->phydev); + phy_disconnect(priv->phydev); + priv->phydev = NULL; + } + + netif_stop_queue(dev); + napi_disable(&priv->napi); + + /* Disable DMA interrupts */ + spin_lock_irqsave(&priv->rxdma_irq_lock, flags); + priv->dmaops->disable_rxirq(priv); + priv->dmaops->disable_txirq(priv); + spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); + + /* Free the IRQ lines */ + free_irq(priv->rx_irq, dev); + free_irq(priv->tx_irq, dev); + + /* disable and reset the MAC, empties fifo */ + spin_lock(&priv->mac_cfg_lock); + spin_lock(&priv->tx_lock); + + ret = reset_mac(priv); + if (ret) + netdev_err(dev, "Cannot reset MAC core (error: %d)\n", ret); + priv->dmaops->reset_dma(priv); + free_skbufs(dev); + + spin_unlock(&priv->tx_lock); + spin_unlock(&priv->mac_cfg_lock); + + priv->dmaops->uninit_dma(priv); + + return 0; +} + +static struct net_device_ops altera_tse_netdev_ops = { + .ndo_open = tse_open, + .ndo_stop = tse_shutdown, + .ndo_start_xmit = tse_start_xmit, + .ndo_set_mac_address = eth_mac_addr, + .ndo_set_rx_mode = tse_set_rx_mode, + .ndo_change_mtu = tse_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + + +static int request_and_map(struct platform_device *pdev, const char *name, + struct resource **res, void __iomem **ptr) +{ + struct resource *region; + struct device *device = &pdev->dev; + + *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + if (*res == NULL) { + dev_err(device, "resource %s not defined\n", name); + return -ENODEV; + } + + region = devm_request_mem_region(device, (*res)->start, + resource_size(*res), dev_name(device)); + if (region == NULL) { + dev_err(device, "unable to request %s\n", name); + return -EBUSY; + } + + *ptr = devm_ioremap_nocache(device, region->start, + resource_size(region)); + if (*ptr == NULL) { + dev_err(device, "ioremap_nocache of %s failed!", name); + return -ENOMEM; + } + + return 0; +} + +/* Probe Altera TSE MAC device + */ +static int altera_tse_probe(struct platform_device *pdev) +{ + struct net_device *ndev; + int ret = -ENODEV; + struct resource *control_port; + struct resource *dma_res; + struct altera_tse_private *priv; + const unsigned char *macaddr; + struct device_node *np = pdev->dev.of_node; + void __iomem *descmap; + const struct of_device_id *of_id = NULL; + + ndev = alloc_etherdev(sizeof(struct altera_tse_private)); + if (!ndev) { + dev_err(&pdev->dev, "Could not allocate network device\n"); + return -ENODEV; + } + + SET_NETDEV_DEV(ndev, &pdev->dev); + + priv = netdev_priv(ndev); + priv->device = &pdev->dev; + priv->dev = ndev; + priv->msg_enable = netif_msg_init(debug, default_msg_level); + + of_id = of_match_device(altera_tse_ids, &pdev->dev); + + if (of_id) + priv->dmaops = (struct altera_dmaops *)of_id->data; + + + if (priv->dmaops && + priv->dmaops->altera_dtype == ALTERA_DTYPE_SGDMA) { + /* Get the mapped address to the SGDMA descriptor memory */ + ret = request_and_map(pdev, "s1", &dma_res, &descmap); + if (ret) + goto out_free; + + /* Start of that memory is for transmit descriptors */ + priv->tx_dma_desc = descmap; + + /* First half is for tx descriptors, other half for tx */ + priv->txdescmem = resource_size(dma_res)/2; + + priv->txdescmem_busaddr = (dma_addr_t)dma_res->start; + + priv->rx_dma_desc = (void __iomem *)((uintptr_t)(descmap + + priv->txdescmem)); + priv->rxdescmem = resource_size(dma_res)/2; + priv->rxdescmem_busaddr = dma_res->start; + priv->rxdescmem_busaddr += priv->txdescmem; + + if (upper_32_bits(priv->rxdescmem_busaddr)) { + dev_dbg(priv->device, + "SGDMA bus addresses greater than 32-bits\n"); + goto out_free; + } + if (upper_32_bits(priv->txdescmem_busaddr)) { + dev_dbg(priv->device, + "SGDMA bus addresses greater than 32-bits\n"); + goto out_free; + } + } else if (priv->dmaops && + priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) { + ret = request_and_map(pdev, "rx_resp", &dma_res, + &priv->rx_dma_resp); + if (ret) + goto out_free; + + ret = request_and_map(pdev, "tx_desc", &dma_res, + &priv->tx_dma_desc); + if (ret) + goto out_free; + + priv->txdescmem = resource_size(dma_res); + priv->txdescmem_busaddr = dma_res->start; + + ret = request_and_map(pdev, "rx_desc", &dma_res, + &priv->rx_dma_desc); + if (ret) + goto out_free; + + priv->rxdescmem = resource_size(dma_res); + priv->rxdescmem_busaddr = dma_res->start; + + } else { + goto out_free; + } + + if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask))) + dma_set_coherent_mask(priv->device, + DMA_BIT_MASK(priv->dmaops->dmamask)); + else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32))) + dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32)); + else + goto out_free; + + /* MAC address space */ + ret = request_and_map(pdev, "control_port", &control_port, + (void __iomem **)&priv->mac_dev); + if (ret) + goto out_free; + + /* xSGDMA Rx Dispatcher address space */ + ret = request_and_map(pdev, "rx_csr", &dma_res, + &priv->rx_dma_csr); + if (ret) + goto out_free; + + + /* xSGDMA Tx Dispatcher address space */ + ret = request_and_map(pdev, "tx_csr", &dma_res, + &priv->tx_dma_csr); + if (ret) + goto out_free; + + + /* Rx IRQ */ + priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq"); + if (priv->rx_irq == -ENXIO) { + dev_err(&pdev->dev, "cannot obtain Rx IRQ\n"); + ret = -ENXIO; + goto out_free; + } + + /* Tx IRQ */ + priv->tx_irq = platform_get_irq_byname(pdev, "tx_irq"); + if (priv->tx_irq == -ENXIO) { + dev_err(&pdev->dev, "cannot obtain Tx IRQ\n"); + ret = -ENXIO; + goto out_free; + } + + /* get FIFO depths from device tree */ + if (of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth", + &priv->rx_fifo_depth)) { + dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n"); + ret = -ENXIO; + goto out_free; + } + + if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth", + &priv->rx_fifo_depth)) { + dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n"); + ret = -ENXIO; + goto out_free; + } + + /* get hash filter settings for this instance */ + priv->hash_filter = + of_property_read_bool(pdev->dev.of_node, + "altr,has-hash-multicast-filter"); + + /* get supplemental address settings for this instance */ + priv->added_unicast = + of_property_read_bool(pdev->dev.of_node, + "altr,has-supplementary-unicast"); + + /* Max MTU is 1500, ETH_DATA_LEN */ + priv->max_mtu = ETH_DATA_LEN; + + /* Get the max mtu from the device tree. Note that the + * "max-frame-size" parameter is actually max mtu. Definition + * in the ePAPR v1.1 spec and usage differ, so go with usage. + */ + of_property_read_u32(pdev->dev.of_node, "max-frame-size", + &priv->max_mtu); + + /* The DMA buffer size already accounts for an alignment bias + * to avoid unaligned access exceptions for the NIOS processor, + */ + priv->rx_dma_buf_sz = ALTERA_RXDMABUFFER_SIZE; + + /* get default MAC address from device tree */ + macaddr = of_get_mac_address(pdev->dev.of_node); + if (macaddr) + ether_addr_copy(ndev->dev_addr, macaddr); + else + eth_hw_addr_random(ndev); + + priv->phy_iface = of_get_phy_mode(np); + + /* try to get PHY address from device tree, use PHY autodetection if + * no valid address is given + */ + if (of_property_read_u32(pdev->dev.of_node, "phy-addr", + &priv->phy_addr)) { + priv->phy_addr = POLL_PHY; + } + + if (!((priv->phy_addr == POLL_PHY) || + ((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) { + dev_err(&pdev->dev, "invalid phy-addr specified %d\n", + priv->phy_addr); + goto out_free; + } + + /* Create/attach to MDIO bus */ + ret = altera_tse_mdio_create(ndev, + atomic_add_return(1, &instance_count)); + + if (ret) + goto out_free; + + /* initialize netdev */ + ether_setup(ndev); + ndev->mem_start = control_port->start; + ndev->mem_end = control_port->end; + ndev->netdev_ops = &altera_tse_netdev_ops; + altera_tse_set_ethtool_ops(ndev); + + altera_tse_netdev_ops.ndo_set_rx_mode = tse_set_rx_mode; + + if (priv->hash_filter) + altera_tse_netdev_ops.ndo_set_rx_mode = + tse_set_rx_mode_hashfilter; + + /* Scatter/gather IO is not supported, + * so it is turned off + */ + ndev->hw_features &= ~NETIF_F_SG; + ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; + + /* VLAN offloading of tagging, stripping and filtering is not + * supported by hardware, but driver will accommodate the + * extra 4-byte VLAN tag for processing by upper layers + */ + ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; + + /* setup NAPI interface */ + netif_napi_add(ndev, &priv->napi, tse_poll, NAPI_POLL_WEIGHT); + + spin_lock_init(&priv->mac_cfg_lock); + spin_lock_init(&priv->tx_lock); + spin_lock_init(&priv->rxdma_irq_lock); + + ret = register_netdev(ndev); + if (ret) { + dev_err(&pdev->dev, "failed to register TSE net device\n"); + goto out_free_mdio; + } + + platform_set_drvdata(pdev, ndev); + + priv->revision = ioread32(&priv->mac_dev->megacore_revision); + + if (netif_msg_probe(priv)) + dev_info(&pdev->dev, "Altera TSE MAC version %d.%d at 0x%08lx irq %d/%d\n", + (priv->revision >> 8) & 0xff, + priv->revision & 0xff, + (unsigned long) control_port->start, priv->rx_irq, + priv->tx_irq); + + ret = init_phy(ndev); + if (ret != 0) { + netdev_err(ndev, "Cannot attach to PHY (error: %d)\n", ret); + goto out_free_mdio; + } + return 0; + +out_free_mdio: + altera_tse_mdio_destroy(ndev); +out_free: + free_netdev(ndev); + return ret; +} + +/* Remove Altera TSE MAC device + */ +static int altera_tse_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + altera_tse_mdio_destroy(ndev); + unregister_netdev(ndev); + free_netdev(ndev); + + return 0; +} + +struct altera_dmaops altera_dtype_sgdma = { + .altera_dtype = ALTERA_DTYPE_SGDMA, + .dmamask = 32, + .reset_dma = sgdma_reset, + .enable_txirq = sgdma_enable_txirq, + .enable_rxirq = sgdma_enable_rxirq, + .disable_txirq = sgdma_disable_txirq, + .disable_rxirq = sgdma_disable_rxirq, + .clear_txirq = sgdma_clear_txirq, + .clear_rxirq = sgdma_clear_rxirq, + .tx_buffer = sgdma_tx_buffer, + .tx_completions = sgdma_tx_completions, + .add_rx_desc = sgdma_add_rx_desc, + .get_rx_status = sgdma_rx_status, + .init_dma = sgdma_initialize, + .uninit_dma = sgdma_uninitialize, +}; + +struct altera_dmaops altera_dtype_msgdma = { + .altera_dtype = ALTERA_DTYPE_MSGDMA, + .dmamask = 64, + .reset_dma = msgdma_reset, + .enable_txirq = msgdma_enable_txirq, + .enable_rxirq = msgdma_enable_rxirq, + .disable_txirq = msgdma_disable_txirq, + .disable_rxirq = msgdma_disable_rxirq, + .clear_txirq = msgdma_clear_txirq, + .clear_rxirq = msgdma_clear_rxirq, + .tx_buffer = msgdma_tx_buffer, + .tx_completions = msgdma_tx_completions, + .add_rx_desc = msgdma_add_rx_desc, + .get_rx_status = msgdma_rx_status, + .init_dma = msgdma_initialize, + .uninit_dma = msgdma_uninitialize, +}; + +static struct of_device_id altera_tse_ids[] = { + { .compatible = "altr,tse-msgdma-1.0", .data = &altera_dtype_msgdma, }, + { .compatible = "altr,tse-1.0", .data = &altera_dtype_sgdma, }, + { .compatible = "ALTR,tse-1.0", .data = &altera_dtype_sgdma, }, + {}, +}; +MODULE_DEVICE_TABLE(of, altera_tse_ids); + +static struct platform_driver altera_tse_driver = { + .probe = altera_tse_probe, + .remove = altera_tse_remove, + .suspend = NULL, + .resume = NULL, + .driver = { + .name = ALTERA_TSE_RESOURCE_NAME, + .owner = THIS_MODULE, + .of_match_table = altera_tse_ids, + }, +}; + +module_platform_driver(altera_tse_driver); + +MODULE_AUTHOR("Altera Corporation"); +MODULE_DESCRIPTION("Altera Triple Speed Ethernet MAC driver"); +MODULE_LICENSE("GPL v2"); |