| /* Intel(R) Gigabit Ethernet Linux driver |
| * Copyright(c) 2007-2014 Intel Corporation. |
| * |
| * 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/>. |
| * |
| * The full GNU General Public License is included in this distribution in |
| * the file called "COPYING". |
| * |
| * Contact Information: |
| * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| */ |
| |
| /* Linux PRO/1000 Ethernet Driver main header file */ |
| |
| #ifndef _IGB_H_ |
| #define _IGB_H_ |
| |
| #include "e1000_mac.h" |
| #include "e1000_82575.h" |
| |
| #include <linux/timecounter.h> |
| #include <linux/net_tstamp.h> |
| #include <linux/ptp_clock_kernel.h> |
| #include <linux/bitops.h> |
| #include <linux/if_vlan.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c-algo-bit.h> |
| #include <linux/pci.h> |
| #include <linux/mdio.h> |
| |
| struct igb_adapter; |
| |
| #define E1000_PCS_CFG_IGN_SD 1 |
| |
| /* Interrupt defines */ |
| #define IGB_START_ITR 648 /* ~6000 ints/sec */ |
| #define IGB_4K_ITR 980 |
| #define IGB_20K_ITR 196 |
| #define IGB_70K_ITR 56 |
| |
| /* TX/RX descriptor defines */ |
| #define IGB_DEFAULT_TXD 256 |
| #define IGB_DEFAULT_TX_WORK 128 |
| #define IGB_MIN_TXD 80 |
| #define IGB_MAX_TXD 4096 |
| |
| #define IGB_DEFAULT_RXD 256 |
| #define IGB_MIN_RXD 80 |
| #define IGB_MAX_RXD 4096 |
| |
| #define IGB_DEFAULT_ITR 3 /* dynamic */ |
| #define IGB_MAX_ITR_USECS 10000 |
| #define IGB_MIN_ITR_USECS 10 |
| #define NON_Q_VECTORS 1 |
| #define MAX_Q_VECTORS 8 |
| #define MAX_MSIX_ENTRIES 10 |
| |
| /* Transmit and receive queues */ |
| #define IGB_MAX_RX_QUEUES 8 |
| #define IGB_MAX_RX_QUEUES_82575 4 |
| #define IGB_MAX_RX_QUEUES_I211 2 |
| #define IGB_MAX_TX_QUEUES 8 |
| #define IGB_MAX_VF_MC_ENTRIES 30 |
| #define IGB_MAX_VF_FUNCTIONS 8 |
| #define IGB_MAX_VFTA_ENTRIES 128 |
| #define IGB_82576_VF_DEV_ID 0x10CA |
| #define IGB_I350_VF_DEV_ID 0x1520 |
| |
| /* NVM version defines */ |
| #define IGB_MAJOR_MASK 0xF000 |
| #define IGB_MINOR_MASK 0x0FF0 |
| #define IGB_BUILD_MASK 0x000F |
| #define IGB_COMB_VER_MASK 0x00FF |
| #define IGB_MAJOR_SHIFT 12 |
| #define IGB_MINOR_SHIFT 4 |
| #define IGB_COMB_VER_SHFT 8 |
| #define IGB_NVM_VER_INVALID 0xFFFF |
| #define IGB_ETRACK_SHIFT 16 |
| #define NVM_ETRACK_WORD 0x0042 |
| #define NVM_COMB_VER_OFF 0x0083 |
| #define NVM_COMB_VER_PTR 0x003d |
| |
| struct vf_data_storage { |
| unsigned char vf_mac_addresses[ETH_ALEN]; |
| u16 vf_mc_hashes[IGB_MAX_VF_MC_ENTRIES]; |
| u16 num_vf_mc_hashes; |
| u16 vlans_enabled; |
| u32 flags; |
| unsigned long last_nack; |
| u16 pf_vlan; /* When set, guest VLAN config not allowed. */ |
| u16 pf_qos; |
| u16 tx_rate; |
| bool spoofchk_enabled; |
| }; |
| |
| #define IGB_VF_FLAG_CTS 0x00000001 /* VF is clear to send data */ |
| #define IGB_VF_FLAG_UNI_PROMISC 0x00000002 /* VF has unicast promisc */ |
| #define IGB_VF_FLAG_MULTI_PROMISC 0x00000004 /* VF has multicast promisc */ |
| #define IGB_VF_FLAG_PF_SET_MAC 0x00000008 /* PF has set MAC address */ |
| |
| /* RX descriptor control thresholds. |
| * PTHRESH - MAC will consider prefetch if it has fewer than this number of |
| * descriptors available in its onboard memory. |
| * Setting this to 0 disables RX descriptor prefetch. |
| * HTHRESH - MAC will only prefetch if there are at least this many descriptors |
| * available in host memory. |
| * If PTHRESH is 0, this should also be 0. |
| * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back |
| * descriptors until either it has this many to write back, or the |
| * ITR timer expires. |
| */ |
| #define IGB_RX_PTHRESH ((hw->mac.type == e1000_i354) ? 12 : 8) |
| #define IGB_RX_HTHRESH 8 |
| #define IGB_TX_PTHRESH ((hw->mac.type == e1000_i354) ? 20 : 8) |
| #define IGB_TX_HTHRESH 1 |
| #define IGB_RX_WTHRESH ((hw->mac.type == e1000_82576 && \ |
| (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 4) |
| #define IGB_TX_WTHRESH ((hw->mac.type == e1000_82576 && \ |
| (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 16) |
| |
| /* this is the size past which hardware will drop packets when setting LPE=0 */ |
| #define MAXIMUM_ETHERNET_VLAN_SIZE 1522 |
| |
| /* Supported Rx Buffer Sizes */ |
| #define IGB_RXBUFFER_256 256 |
| #define IGB_RXBUFFER_2048 2048 |
| #define IGB_RX_HDR_LEN IGB_RXBUFFER_256 |
| #define IGB_RX_BUFSZ IGB_RXBUFFER_2048 |
| |
| /* How many Rx Buffers do we bundle into one write to the hardware ? */ |
| #define IGB_RX_BUFFER_WRITE 16 /* Must be power of 2 */ |
| |
| #define AUTO_ALL_MODES 0 |
| #define IGB_EEPROM_APME 0x0400 |
| |
| #ifndef IGB_MASTER_SLAVE |
| /* Switch to override PHY master/slave setting */ |
| #define IGB_MASTER_SLAVE e1000_ms_hw_default |
| #endif |
| |
| #define IGB_MNG_VLAN_NONE -1 |
| |
| enum igb_tx_flags { |
| /* cmd_type flags */ |
| IGB_TX_FLAGS_VLAN = 0x01, |
| IGB_TX_FLAGS_TSO = 0x02, |
| IGB_TX_FLAGS_TSTAMP = 0x04, |
| |
| /* olinfo flags */ |
| IGB_TX_FLAGS_IPV4 = 0x10, |
| IGB_TX_FLAGS_CSUM = 0x20, |
| }; |
| |
| /* VLAN info */ |
| #define IGB_TX_FLAGS_VLAN_MASK 0xffff0000 |
| #define IGB_TX_FLAGS_VLAN_SHIFT 16 |
| |
| /* The largest size we can write to the descriptor is 65535. In order to |
| * maintain a power of two alignment we have to limit ourselves to 32K. |
| */ |
| #define IGB_MAX_TXD_PWR 15 |
| #define IGB_MAX_DATA_PER_TXD (1 << IGB_MAX_TXD_PWR) |
| |
| /* Tx Descriptors needed, worst case */ |
| #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IGB_MAX_DATA_PER_TXD) |
| #define DESC_NEEDED (MAX_SKB_FRAGS + 4) |
| |
| /* EEPROM byte offsets */ |
| #define IGB_SFF_8472_SWAP 0x5C |
| #define IGB_SFF_8472_COMP 0x5E |
| |
| /* Bitmasks */ |
| #define IGB_SFF_ADDRESSING_MODE 0x4 |
| #define IGB_SFF_8472_UNSUP 0x00 |
| |
| /* wrapper around a pointer to a socket buffer, |
| * so a DMA handle can be stored along with the buffer |
| */ |
| struct igb_tx_buffer { |
| union e1000_adv_tx_desc *next_to_watch; |
| unsigned long time_stamp; |
| struct sk_buff *skb; |
| unsigned int bytecount; |
| u16 gso_segs; |
| __be16 protocol; |
| |
| DEFINE_DMA_UNMAP_ADDR(dma); |
| DEFINE_DMA_UNMAP_LEN(len); |
| u32 tx_flags; |
| }; |
| |
| struct igb_rx_buffer { |
| dma_addr_t dma; |
| struct page *page; |
| unsigned int page_offset; |
| }; |
| |
| struct igb_tx_queue_stats { |
| u64 packets; |
| u64 bytes; |
| u64 restart_queue; |
| u64 restart_queue2; |
| }; |
| |
| struct igb_rx_queue_stats { |
| u64 packets; |
| u64 bytes; |
| u64 drops; |
| u64 csum_err; |
| u64 alloc_failed; |
| }; |
| |
| struct igb_ring_container { |
| struct igb_ring *ring; /* pointer to linked list of rings */ |
| unsigned int total_bytes; /* total bytes processed this int */ |
| unsigned int total_packets; /* total packets processed this int */ |
| u16 work_limit; /* total work allowed per interrupt */ |
| u8 count; /* total number of rings in vector */ |
| u8 itr; /* current ITR setting for ring */ |
| }; |
| |
| struct igb_ring { |
| struct igb_q_vector *q_vector; /* backlink to q_vector */ |
| struct net_device *netdev; /* back pointer to net_device */ |
| struct device *dev; /* device pointer for dma mapping */ |
| union { /* array of buffer info structs */ |
| struct igb_tx_buffer *tx_buffer_info; |
| struct igb_rx_buffer *rx_buffer_info; |
| }; |
| void *desc; /* descriptor ring memory */ |
| unsigned long flags; /* ring specific flags */ |
| void __iomem *tail; /* pointer to ring tail register */ |
| dma_addr_t dma; /* phys address of the ring */ |
| unsigned int size; /* length of desc. ring in bytes */ |
| |
| u16 count; /* number of desc. in the ring */ |
| u8 queue_index; /* logical index of the ring*/ |
| u8 reg_idx; /* physical index of the ring */ |
| |
| /* everything past this point are written often */ |
| u16 next_to_clean; |
| u16 next_to_use; |
| u16 next_to_alloc; |
| |
| union { |
| /* TX */ |
| struct { |
| struct igb_tx_queue_stats tx_stats; |
| struct u64_stats_sync tx_syncp; |
| struct u64_stats_sync tx_syncp2; |
| }; |
| /* RX */ |
| struct { |
| struct sk_buff *skb; |
| struct igb_rx_queue_stats rx_stats; |
| struct u64_stats_sync rx_syncp; |
| }; |
| }; |
| } ____cacheline_internodealigned_in_smp; |
| |
| struct igb_q_vector { |
| struct igb_adapter *adapter; /* backlink */ |
| int cpu; /* CPU for DCA */ |
| u32 eims_value; /* EIMS mask value */ |
| |
| u16 itr_val; |
| u8 set_itr; |
| void __iomem *itr_register; |
| |
| struct igb_ring_container rx, tx; |
| |
| struct napi_struct napi; |
| struct rcu_head rcu; /* to avoid race with update stats on free */ |
| char name[IFNAMSIZ + 9]; |
| |
| /* for dynamic allocation of rings associated with this q_vector */ |
| struct igb_ring ring[0] ____cacheline_internodealigned_in_smp; |
| }; |
| |
| enum e1000_ring_flags_t { |
| IGB_RING_FLAG_RX_SCTP_CSUM, |
| IGB_RING_FLAG_RX_LB_VLAN_BSWAP, |
| IGB_RING_FLAG_TX_CTX_IDX, |
| IGB_RING_FLAG_TX_DETECT_HANG |
| }; |
| |
| #define IGB_TXD_DCMD (E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_RS) |
| |
| #define IGB_RX_DESC(R, i) \ |
| (&(((union e1000_adv_rx_desc *)((R)->desc))[i])) |
| #define IGB_TX_DESC(R, i) \ |
| (&(((union e1000_adv_tx_desc *)((R)->desc))[i])) |
| #define IGB_TX_CTXTDESC(R, i) \ |
| (&(((struct e1000_adv_tx_context_desc *)((R)->desc))[i])) |
| |
| /* igb_test_staterr - tests bits within Rx descriptor status and error fields */ |
| static inline __le32 igb_test_staterr(union e1000_adv_rx_desc *rx_desc, |
| const u32 stat_err_bits) |
| { |
| return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits); |
| } |
| |
| /* igb_desc_unused - calculate if we have unused descriptors */ |
| static inline int igb_desc_unused(struct igb_ring *ring) |
| { |
| if (ring->next_to_clean > ring->next_to_use) |
| return ring->next_to_clean - ring->next_to_use - 1; |
| |
| return ring->count + ring->next_to_clean - ring->next_to_use - 1; |
| } |
| |
| #ifdef CPTCFG_IGB_HWMON |
| |
| #define IGB_HWMON_TYPE_LOC 0 |
| #define IGB_HWMON_TYPE_TEMP 1 |
| #define IGB_HWMON_TYPE_CAUTION 2 |
| #define IGB_HWMON_TYPE_MAX 3 |
| |
| struct hwmon_attr { |
| struct device_attribute dev_attr; |
| struct e1000_hw *hw; |
| struct e1000_thermal_diode_data *sensor; |
| char name[12]; |
| }; |
| |
| struct hwmon_buff { |
| struct attribute_group group; |
| const struct attribute_group *groups[2]; |
| struct attribute *attrs[E1000_MAX_SENSORS * 4 + 1]; |
| struct hwmon_attr hwmon_list[E1000_MAX_SENSORS * 4]; |
| unsigned int n_hwmon; |
| }; |
| #endif |
| |
| #define IGB_N_EXTTS 2 |
| #define IGB_N_PEROUT 2 |
| #define IGB_N_SDP 4 |
| #define IGB_RETA_SIZE 128 |
| |
| /* board specific private data structure */ |
| struct igb_adapter { |
| unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; |
| |
| struct net_device *netdev; |
| |
| unsigned long state; |
| unsigned int flags; |
| |
| unsigned int num_q_vectors; |
| struct msix_entry msix_entries[MAX_MSIX_ENTRIES]; |
| |
| /* Interrupt Throttle Rate */ |
| u32 rx_itr_setting; |
| u32 tx_itr_setting; |
| u16 tx_itr; |
| u16 rx_itr; |
| |
| /* TX */ |
| u16 tx_work_limit; |
| u32 tx_timeout_count; |
| int num_tx_queues; |
| struct igb_ring *tx_ring[16]; |
| |
| /* RX */ |
| int num_rx_queues; |
| struct igb_ring *rx_ring[16]; |
| |
| u32 max_frame_size; |
| u32 min_frame_size; |
| |
| struct timer_list watchdog_timer; |
| struct timer_list phy_info_timer; |
| |
| u16 mng_vlan_id; |
| u32 bd_number; |
| u32 wol; |
| u32 en_mng_pt; |
| u16 link_speed; |
| u16 link_duplex; |
| |
| struct work_struct reset_task; |
| struct work_struct watchdog_task; |
| bool fc_autoneg; |
| u8 tx_timeout_factor; |
| struct timer_list blink_timer; |
| unsigned long led_status; |
| |
| /* OS defined structs */ |
| struct pci_dev *pdev; |
| |
| spinlock_t stats64_lock; |
| struct rtnl_link_stats64 stats64; |
| |
| /* structs defined in e1000_hw.h */ |
| struct e1000_hw hw; |
| struct e1000_hw_stats stats; |
| struct e1000_phy_info phy_info; |
| |
| u32 test_icr; |
| struct igb_ring test_tx_ring; |
| struct igb_ring test_rx_ring; |
| |
| int msg_enable; |
| |
| struct igb_q_vector *q_vector[MAX_Q_VECTORS]; |
| u32 eims_enable_mask; |
| u32 eims_other; |
| |
| /* to not mess up cache alignment, always add to the bottom */ |
| u16 tx_ring_count; |
| u16 rx_ring_count; |
| unsigned int vfs_allocated_count; |
| struct vf_data_storage *vf_data; |
| int vf_rate_link_speed; |
| u32 rss_queues; |
| u32 wvbr; |
| u32 *shadow_vfta; |
| |
| struct ptp_clock *ptp_clock; |
| struct ptp_clock_info ptp_caps; |
| struct delayed_work ptp_overflow_work; |
| struct work_struct ptp_tx_work; |
| struct sk_buff *ptp_tx_skb; |
| struct hwtstamp_config tstamp_config; |
| unsigned long ptp_tx_start; |
| unsigned long last_rx_ptp_check; |
| unsigned long last_rx_timestamp; |
| spinlock_t tmreg_lock; |
| struct cyclecounter cc; |
| struct timecounter tc; |
| u32 tx_hwtstamp_timeouts; |
| u32 rx_hwtstamp_cleared; |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0) |
| struct ptp_pin_desc sdp_config[IGB_N_SDP]; |
| #endif |
| struct { |
| struct timespec start; |
| struct timespec period; |
| } perout[IGB_N_PEROUT]; |
| |
| char fw_version[32]; |
| #ifdef CPTCFG_IGB_HWMON |
| struct hwmon_buff *igb_hwmon_buff; |
| bool ets; |
| #endif |
| struct i2c_algo_bit_data i2c_algo; |
| struct i2c_adapter i2c_adap; |
| struct i2c_client *i2c_client; |
| u32 rss_indir_tbl_init; |
| u8 rss_indir_tbl[IGB_RETA_SIZE]; |
| |
| unsigned long link_check_timeout; |
| int copper_tries; |
| struct e1000_info ei; |
| u16 eee_advert; |
| }; |
| |
| #define IGB_FLAG_HAS_MSI (1 << 0) |
| #define IGB_FLAG_DCA_ENABLED (1 << 1) |
| #define IGB_FLAG_QUAD_PORT_A (1 << 2) |
| #define IGB_FLAG_QUEUE_PAIRS (1 << 3) |
| #define IGB_FLAG_DMAC (1 << 4) |
| #define IGB_FLAG_PTP (1 << 5) |
| #define IGB_FLAG_RSS_FIELD_IPV4_UDP (1 << 6) |
| #define IGB_FLAG_RSS_FIELD_IPV6_UDP (1 << 7) |
| #define IGB_FLAG_WOL_SUPPORTED (1 << 8) |
| #define IGB_FLAG_NEED_LINK_UPDATE (1 << 9) |
| #define IGB_FLAG_MEDIA_RESET (1 << 10) |
| #define IGB_FLAG_MAS_CAPABLE (1 << 11) |
| #define IGB_FLAG_MAS_ENABLE (1 << 12) |
| #define IGB_FLAG_HAS_MSIX (1 << 13) |
| #define IGB_FLAG_EEE (1 << 14) |
| |
| /* Media Auto Sense */ |
| #define IGB_MAS_ENABLE_0 0X0001 |
| #define IGB_MAS_ENABLE_1 0X0002 |
| #define IGB_MAS_ENABLE_2 0X0004 |
| #define IGB_MAS_ENABLE_3 0X0008 |
| |
| /* DMA Coalescing defines */ |
| #define IGB_MIN_TXPBSIZE 20408 |
| #define IGB_TX_BUF_4096 4096 |
| #define IGB_DMCTLX_DCFLUSH_DIS 0x80000000 /* Disable DMA Coal Flush */ |
| |
| #define IGB_82576_TSYNC_SHIFT 19 |
| #define IGB_TS_HDR_LEN 16 |
| enum e1000_state_t { |
| __IGB_TESTING, |
| __IGB_RESETTING, |
| __IGB_DOWN, |
| __IGB_PTP_TX_IN_PROGRESS, |
| }; |
| |
| enum igb_boards { |
| board_82575, |
| }; |
| |
| extern char igb_driver_name[]; |
| extern char igb_driver_version[]; |
| |
| int igb_up(struct igb_adapter *); |
| void igb_down(struct igb_adapter *); |
| void igb_reinit_locked(struct igb_adapter *); |
| void igb_reset(struct igb_adapter *); |
| int igb_reinit_queues(struct igb_adapter *); |
| void igb_write_rss_indir_tbl(struct igb_adapter *); |
| int igb_set_spd_dplx(struct igb_adapter *, u32, u8); |
| int igb_setup_tx_resources(struct igb_ring *); |
| int igb_setup_rx_resources(struct igb_ring *); |
| void igb_free_tx_resources(struct igb_ring *); |
| void igb_free_rx_resources(struct igb_ring *); |
| void igb_configure_tx_ring(struct igb_adapter *, struct igb_ring *); |
| void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *); |
| void igb_setup_tctl(struct igb_adapter *); |
| void igb_setup_rctl(struct igb_adapter *); |
| netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *); |
| void igb_unmap_and_free_tx_resource(struct igb_ring *, struct igb_tx_buffer *); |
| void igb_alloc_rx_buffers(struct igb_ring *, u16); |
| void igb_update_stats(struct igb_adapter *, struct rtnl_link_stats64 *); |
| bool igb_has_link(struct igb_adapter *adapter); |
| void igb_set_ethtool_ops(struct net_device *); |
| void igb_power_up_link(struct igb_adapter *); |
| void igb_set_fw_version(struct igb_adapter *); |
| void igb_ptp_init(struct igb_adapter *adapter); |
| void igb_ptp_stop(struct igb_adapter *adapter); |
| void igb_ptp_reset(struct igb_adapter *adapter); |
| void igb_ptp_rx_hang(struct igb_adapter *adapter); |
| void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb); |
| void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, unsigned char *va, |
| struct sk_buff *skb); |
| int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr); |
| int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr); |
| #ifdef CPTCFG_IGB_HWMON |
| void igb_sysfs_exit(struct igb_adapter *adapter); |
| int igb_sysfs_init(struct igb_adapter *adapter); |
| #endif |
| static inline s32 igb_reset_phy(struct e1000_hw *hw) |
| { |
| if (hw->phy.ops.reset) |
| return hw->phy.ops.reset(hw); |
| |
| return 0; |
| } |
| |
| static inline s32 igb_read_phy_reg(struct e1000_hw *hw, u32 offset, u16 *data) |
| { |
| if (hw->phy.ops.read_reg) |
| return hw->phy.ops.read_reg(hw, offset, data); |
| |
| return 0; |
| } |
| |
| static inline s32 igb_write_phy_reg(struct e1000_hw *hw, u32 offset, u16 data) |
| { |
| if (hw->phy.ops.write_reg) |
| return hw->phy.ops.write_reg(hw, offset, data); |
| |
| return 0; |
| } |
| |
| static inline s32 igb_get_phy_info(struct e1000_hw *hw) |
| { |
| if (hw->phy.ops.get_phy_info) |
| return hw->phy.ops.get_phy_info(hw); |
| |
| return 0; |
| } |
| |
| static inline struct netdev_queue *txring_txq(const struct igb_ring *tx_ring) |
| { |
| return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index); |
| } |
| |
| #endif /* _IGB_H_ */ |