Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 583 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes.h b/drivers/infiniband/hw/nes/nes.h
new file mode 100644
index 000000000..bedaa0274
--- /dev/null
+++ b/drivers/infiniband/hw/nes/nes.h
@@ -0,0 +1,583 @@
+/*
+ * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __NES_H
+#define __NES_H
+
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <linux/crc32c.h>
+
+#include <rdma/ib_smi.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_pack.h>
+#include <rdma/rdma_cm.h>
+#include <rdma/iw_cm.h>
+#include <rdma/rdma_netlink.h>
+#include <rdma/iw_portmap.h>
+
+#define NES_SEND_FIRST_WRITE
+
+#define QUEUE_DISCONNECTS
+
+#define DRV_NAME    "iw_nes"
+#define DRV_VERSION "1.5.0.1"
+#define PFX         DRV_NAME ": "
+
+/*
+ * NetEffect PCI vendor id and NE010 PCI device id.
+ */
+#ifndef PCI_VENDOR_ID_NETEFFECT	/* not in pci.ids yet */
+#define PCI_VENDOR_ID_NETEFFECT          0x1678
+#define PCI_DEVICE_ID_NETEFFECT_NE020    0x0100
+#define PCI_DEVICE_ID_NETEFFECT_NE020_KR 0x0110
+#endif
+
+#define NE020_REV   4
+#define NE020_REV1  5
+
+#define BAR_0       0
+#define BAR_1       2
+
+#define RX_BUF_SIZE             (1536 + 8)
+#define NES_REG0_SIZE           (4 * 1024)
+#define NES_TX_TIMEOUT          (6*HZ)
+#define NES_FIRST_QPN           64
+#define NES_SW_CONTEXT_ALIGN    1024
+
+#define NES_MAX_MTU		9000
+
+#define NES_NIC_MAX_NICS        16
+#define NES_MAX_ARP_TABLE_SIZE  4096
+
+#define NES_NIC_CEQ_SIZE        8
+/* NICs will be on a separate CQ */
+#define NES_CCEQ_SIZE ((nesadapter->max_cq / nesadapter->port_count) - 32)
+
+#define NES_MAX_PORT_COUNT 4
+
+#define MAX_DPC_ITERATIONS               128
+
+#define NES_DRV_OPT_ENABLE_MPA_VER_0     0x00000001
+#define NES_DRV_OPT_DISABLE_MPA_CRC      0x00000002
+#define NES_DRV_OPT_DISABLE_FIRST_WRITE  0x00000004
+#define NES_DRV_OPT_DISABLE_INTF         0x00000008
+#define NES_DRV_OPT_ENABLE_MSI           0x00000010
+#define NES_DRV_OPT_DUAL_LOGICAL_PORT    0x00000020
+#define NES_DRV_OPT_SUPRESS_OPTION_BC    0x00000040
+#define NES_DRV_OPT_NO_INLINE_DATA       0x00000080
+#define NES_DRV_OPT_DISABLE_INT_MOD      0x00000100
+#define NES_DRV_OPT_DISABLE_VIRT_WQ      0x00000200
+#define NES_DRV_OPT_ENABLE_PAU           0x00000400
+
+#define NES_AEQ_EVENT_TIMEOUT         2500
+#define NES_DISCONNECT_EVENT_TIMEOUT  2000
+
+/* debug levels */
+/* must match userspace */
+#define NES_DBG_HW          0x00000001
+#define NES_DBG_INIT        0x00000002
+#define NES_DBG_ISR         0x00000004
+#define NES_DBG_PHY         0x00000008
+#define NES_DBG_NETDEV      0x00000010
+#define NES_DBG_CM          0x00000020
+#define NES_DBG_CM1         0x00000040
+#define NES_DBG_NIC_RX      0x00000080
+#define NES_DBG_NIC_TX      0x00000100
+#define NES_DBG_CQP         0x00000200
+#define NES_DBG_MMAP        0x00000400
+#define NES_DBG_MR          0x00000800
+#define NES_DBG_PD          0x00001000
+#define NES_DBG_CQ          0x00002000
+#define NES_DBG_QP          0x00004000
+#define NES_DBG_MOD_QP      0x00008000
+#define NES_DBG_AEQ         0x00010000
+#define NES_DBG_IW_RX       0x00020000
+#define NES_DBG_IW_TX       0x00040000
+#define NES_DBG_SHUTDOWN    0x00080000
+#define NES_DBG_PAU         0x00100000
+#define NES_DBG_NLMSG       0x00200000
+#define NES_DBG_RSVD1       0x10000000
+#define NES_DBG_RSVD2       0x20000000
+#define NES_DBG_RSVD3       0x40000000
+#define NES_DBG_RSVD4       0x80000000
+#define NES_DBG_ALL         0xffffffff
+
+#ifdef CONFIG_INFINIBAND_NES_DEBUG
+#define nes_debug(level, fmt, args...) \
+do { \
+	if (level & nes_debug_level) \
+		printk(KERN_ERR PFX "%s[%u]: " fmt, __func__, __LINE__, ##args); \
+} while (0)
+
+#define assert(expr) \
+do { \
+	if (!(expr)) { \
+		printk(KERN_ERR PFX "Assertion failed! %s, %s, %s, line %d\n", \
+			   #expr, __FILE__, __func__, __LINE__); \
+	} \
+} while (0)
+
+#define NES_EVENT_TIMEOUT   1200000
+#else
+#define nes_debug(level, fmt, args...) no_printk(fmt, ##args)
+#define assert(expr)          do {} while (0)
+
+#define NES_EVENT_TIMEOUT   100000
+#endif
+
+#include "nes_hw.h"
+#include "nes_verbs.h"
+#include "nes_context.h"
+#include <rdma/nes-abi.h>
+#include "nes_cm.h"
+#include "nes_mgt.h"
+
+extern int interrupt_mod_interval;
+extern int nes_if_count;
+extern int mpa_version;
+extern int disable_mpa_crc;
+extern unsigned int nes_drv_opt;
+extern unsigned int nes_debug_level;
+extern unsigned int wqm_quanta;
+extern struct list_head nes_adapter_list;
+
+extern atomic_t cm_connects;
+extern atomic_t cm_accepts;
+extern atomic_t cm_disconnects;
+extern atomic_t cm_closes;
+extern atomic_t cm_connecteds;
+extern atomic_t cm_connect_reqs;
+extern atomic_t cm_rejects;
+extern atomic_t mod_qp_timouts;
+extern atomic_t qps_created;
+extern atomic_t qps_destroyed;
+extern atomic_t sw_qps_destroyed;
+extern u32 mh_detected;
+extern u32 mh_pauses_sent;
+extern u32 cm_packets_sent;
+extern u32 cm_packets_bounced;
+extern u32 cm_packets_created;
+extern u32 cm_packets_received;
+extern u32 cm_packets_dropped;
+extern u32 cm_packets_retrans;
+extern atomic_t cm_listens_created;
+extern atomic_t cm_listens_destroyed;
+extern u32 cm_backlog_drops;
+extern atomic_t cm_loopbacks;
+extern atomic_t cm_nodes_created;
+extern atomic_t cm_nodes_destroyed;
+extern atomic_t cm_accel_dropped_pkts;
+extern atomic_t cm_resets_recvd;
+extern atomic_t pau_qps_created;
+extern atomic_t pau_qps_destroyed;
+
+extern u32 int_mod_timer_init;
+extern u32 int_mod_cq_depth_256;
+extern u32 int_mod_cq_depth_128;
+extern u32 int_mod_cq_depth_32;
+extern u32 int_mod_cq_depth_24;
+extern u32 int_mod_cq_depth_16;
+extern u32 int_mod_cq_depth_4;
+extern u32 int_mod_cq_depth_1;
+
+struct nes_device {
+	struct nes_adapter	   *nesadapter;
+	void __iomem           *regs;
+	void __iomem           *index_reg;
+	struct pci_dev         *pcidev;
+	struct net_device      *netdev[NES_NIC_MAX_NICS];
+	u64                    link_status_interrupts;
+	struct tasklet_struct  dpc_tasklet;
+	spinlock_t             indexed_regs_lock;
+	unsigned long          csr_start;
+	unsigned long          doorbell_region;
+	unsigned long          doorbell_start;
+	unsigned long          mac_tx_errors;
+	unsigned long          mac_pause_frames_sent;
+	unsigned long          mac_pause_frames_received;
+	unsigned long          mac_rx_errors;
+	unsigned long          mac_rx_crc_errors;
+	unsigned long          mac_rx_symbol_err_frames;
+	unsigned long          mac_rx_jabber_frames;
+	unsigned long          mac_rx_oversized_frames;
+	unsigned long          mac_rx_short_frames;
+	unsigned long          port_rx_discards;
+	unsigned long          port_tx_discards;
+	unsigned int           mac_index;
+	unsigned int           nes_stack_start;
+
+	/* Control Structures */
+	void                   *cqp_vbase;
+	dma_addr_t             cqp_pbase;
+	u32                    cqp_mem_size;
+	u8                     ceq_index;
+	u8                     nic_ceq_index;
+	struct nes_hw_cqp      cqp;
+	struct nes_hw_cq       ccq;
+	struct list_head       cqp_avail_reqs;
+	struct list_head       cqp_pending_reqs;
+	struct nes_cqp_request *nes_cqp_requests;
+
+	u32                    int_req;
+	u32                    int_stat;
+	u32                    timer_int_req;
+	u32                    timer_only_int_count;
+	u32                    intf_int_req;
+	u32                    last_mac_tx_pauses;
+	u32                    last_used_chunks_tx;
+	struct list_head       list;
+
+	u16                    base_doorbell_index;
+	u16                    currcq_count;
+	u16                    deepcq_count;
+	u8                     iw_status;
+	u8                     msi_enabled;
+	u8                     netdev_count;
+	u8                     napi_isr_ran;
+	u8                     disable_rx_flow_control;
+	u8                     disable_tx_flow_control;
+
+	struct delayed_work    work;
+	u8                     link_recheck;
+};
+
+/* Receive skb private area - must fit in skb->cb area */
+struct nes_rskb_cb {
+	u64                    busaddr;
+	u32                    maplen;
+	u32                    seqnum;
+	u8                     *data_start;
+	struct nes_qp          *nesqp;
+};
+
+static inline __le32 get_crc_value(struct nes_v4_quad *nes_quad)
+{
+	u32 crc_value;
+	crc_value = crc32c(~0, (void *)nes_quad, sizeof (struct nes_v4_quad));
+
+	/*
+	 * With commit ef19454b ("[LIB] crc32c: Keep intermediate crc
+	 * state in cpu order"), behavior of crc32c changes on
+	 * big-endian platforms.  Our algorithm expects the previous
+	 * behavior; otherwise we have RDMA connection establishment
+	 * issue on big-endian.
+	 */
+	return cpu_to_le32(crc_value);
+}
+
+static inline void
+set_wqe_64bit_value(__le32 *wqe_words, u32 index, u64 value)
+{
+	wqe_words[index]     = cpu_to_le32((u32) value);
+	wqe_words[index + 1] = cpu_to_le32(upper_32_bits(value));
+}
+
+static inline void
+set_wqe_32bit_value(__le32 *wqe_words, u32 index, u32 value)
+{
+	wqe_words[index] = cpu_to_le32(value);
+}
+
+static inline void
+nes_fill_init_cqp_wqe(struct nes_hw_cqp_wqe *cqp_wqe, struct nes_device *nesdev)
+{
+	cqp_wqe->wqe_words[NES_CQP_WQE_COMP_CTX_LOW_IDX]       = 0;
+	cqp_wqe->wqe_words[NES_CQP_WQE_COMP_CTX_HIGH_IDX]      = 0;
+	cqp_wqe->wqe_words[NES_CQP_WQE_COMP_SCRATCH_LOW_IDX]   = 0;
+	cqp_wqe->wqe_words[NES_CQP_WQE_COMP_SCRATCH_HIGH_IDX]  = 0;
+	cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX] = 0;
+	cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_LEN_IDX]       = 0;
+	cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_LOW_IDX]       = 0;
+	cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PA_LOW_IDX]        = 0;
+	cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PA_HIGH_IDX]       = 0;
+}
+
+static inline void
+nes_fill_init_qp_wqe(struct nes_hw_qp_wqe *wqe, struct nes_qp *nesqp, u32 head)
+{
+	u32 value;
+	value = ((u32)((unsigned long) nesqp)) | head;
+	set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_HIGH_IDX,
+			(u32)(upper_32_bits((unsigned long)(nesqp))));
+	set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, value);
+}
+
+/* Read from memory-mapped device */
+static inline u32 nes_read_indexed(struct nes_device *nesdev, u32 reg_index)
+{
+	unsigned long flags;
+	void __iomem *addr = nesdev->index_reg;
+	u32 value;
+
+	spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
+
+	writel(reg_index, addr);
+	value = readl((void __iomem *)addr + 4);
+
+	spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
+	return value;
+}
+
+static inline u32 nes_read32(const void __iomem *addr)
+{
+	return readl(addr);
+}
+
+static inline u16 nes_read16(const void __iomem *addr)
+{
+	return readw(addr);
+}
+
+static inline u8 nes_read8(const void __iomem *addr)
+{
+	return readb(addr);
+}
+
+/* Write to memory-mapped device */
+static inline void nes_write_indexed(struct nes_device *nesdev, u32 reg_index, u32 val)
+{
+	unsigned long flags;
+	void __iomem *addr = nesdev->index_reg;
+
+	spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
+
+	writel(reg_index, addr);
+	writel(val, (void __iomem *)addr + 4);
+
+	spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
+}
+
+static inline void nes_write32(void __iomem *addr, u32 val)
+{
+	writel(val, addr);
+}
+
+static inline void nes_write16(void __iomem *addr, u16 val)
+{
+	writew(val, addr);
+}
+
+static inline void nes_write8(void __iomem *addr, u8 val)
+{
+	writeb(val, addr);
+}
+
+enum nes_resource {
+	NES_RESOURCE_MW = 1,
+	NES_RESOURCE_FAST_MR,
+	NES_RESOURCE_PHYS_MR,
+	NES_RESOURCE_USER_MR,
+	NES_RESOURCE_PD,
+	NES_RESOURCE_QP,
+	NES_RESOURCE_CQ,
+	NES_RESOURCE_ARP
+};
+
+static inline int nes_alloc_resource(struct nes_adapter *nesadapter,
+		unsigned long *resource_array, u32 max_resources,
+		u32 *req_resource_num, u32 *next, enum nes_resource resource_type)
+{
+	unsigned long flags;
+	u32 resource_num;
+
+	spin_lock_irqsave(&nesadapter->resource_lock, flags);
+
+	resource_num = find_next_zero_bit(resource_array, max_resources, *next);
+	if (resource_num >= max_resources) {
+		resource_num = find_first_zero_bit(resource_array, max_resources);
+		if (resource_num >= max_resources) {
+			printk(KERN_ERR PFX "%s: No available resources [type=%u].\n", __func__, resource_type);
+			spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
+			return -EMFILE;
+		}
+	}
+	set_bit(resource_num, resource_array);
+	*next = resource_num+1;
+	if (*next == max_resources) {
+		*next = 0;
+	}
+	spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
+	*req_resource_num = resource_num;
+
+	return 0;
+}
+
+static inline int nes_is_resource_allocated(struct nes_adapter *nesadapter,
+		unsigned long *resource_array, u32 resource_num)
+{
+	unsigned long flags;
+	int bit_is_set;
+
+	spin_lock_irqsave(&nesadapter->resource_lock, flags);
+
+	bit_is_set = test_bit(resource_num, resource_array);
+	nes_debug(NES_DBG_HW, "resource_num %u is%s allocated.\n",
+			resource_num, (bit_is_set ? "": " not"));
+	spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
+
+	return bit_is_set;
+}
+
+static inline void nes_free_resource(struct nes_adapter *nesadapter,
+		unsigned long *resource_array, u32 resource_num)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&nesadapter->resource_lock, flags);
+	clear_bit(resource_num, resource_array);
+	spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
+}
+
+static inline struct nes_vnic *to_nesvnic(struct ib_device *ibdev)
+{
+	return container_of(ibdev, struct nes_ib_device, ibdev)->nesvnic;
+}
+
+static inline struct nes_pd *to_nespd(struct ib_pd *ibpd)
+{
+	return container_of(ibpd, struct nes_pd, ibpd);
+}
+
+static inline struct nes_ucontext *to_nesucontext(struct ib_ucontext *ibucontext)
+{
+	return container_of(ibucontext, struct nes_ucontext, ibucontext);
+}
+
+static inline struct nes_mr *to_nesmr(struct ib_mr *ibmr)
+{
+	return container_of(ibmr, struct nes_mr, ibmr);
+}
+
+static inline struct nes_mr *to_nesmr_from_ibfmr(struct ib_fmr *ibfmr)
+{
+	return container_of(ibfmr, struct nes_mr, ibfmr);
+}
+
+static inline struct nes_mr *to_nesmw(struct ib_mw *ibmw)
+{
+	return container_of(ibmw, struct nes_mr, ibmw);
+}
+
+static inline struct nes_fmr *to_nesfmr(struct nes_mr *nesmr)
+{
+	return container_of(nesmr, struct nes_fmr, nesmr);
+}
+
+static inline struct nes_cq *to_nescq(struct ib_cq *ibcq)
+{
+	return container_of(ibcq, struct nes_cq, ibcq);
+}
+
+static inline struct nes_qp *to_nesqp(struct ib_qp *ibqp)
+{
+	return container_of(ibqp, struct nes_qp, ibqp);
+}
+
+
+
+/* nes.c */
+void nes_add_ref(struct ib_qp *);
+void nes_rem_ref(struct ib_qp *);
+struct ib_qp *nes_get_qp(struct ib_device *, int);
+
+
+/* nes_hw.c */
+struct nes_adapter *nes_init_adapter(struct nes_device *, u8);
+void  nes_nic_init_timer_defaults(struct nes_device *, u8);
+void nes_destroy_adapter(struct nes_adapter *);
+int nes_init_cqp(struct nes_device *);
+int nes_init_phy(struct nes_device *);
+int nes_init_nic_qp(struct nes_device *, struct net_device *);
+void nes_destroy_nic_qp(struct nes_vnic *);
+int nes_napi_isr(struct nes_device *);
+void nes_dpc(unsigned long);
+void nes_nic_ce_handler(struct nes_device *, struct nes_hw_nic_cq *);
+void nes_iwarp_ce_handler(struct nes_device *, struct nes_hw_cq *);
+int nes_destroy_cqp(struct nes_device *);
+int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
+void nes_recheck_link_status(struct work_struct *work);
+void nes_terminate_timeout(struct timer_list *t);
+
+/* nes_nic.c */
+struct net_device *nes_netdev_init(struct nes_device *, void __iomem *);
+void nes_netdev_destroy(struct net_device *);
+int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
+
+/* nes_cm.c */
+void *nes_cm_create(struct net_device *);
+int nes_cm_recv(struct sk_buff *, struct net_device *);
+void nes_update_arp(unsigned char *, u32, u32, u16, u16);
+void nes_manage_arp_cache(struct net_device *, unsigned char *, u32, u32);
+void nes_sock_release(struct nes_qp *, unsigned long *);
+void flush_wqes(struct nes_device *nesdev, struct nes_qp *, u32, u32);
+int nes_manage_apbvt(struct nes_vnic *, u32, u32, u32);
+int nes_cm_disconn(struct nes_qp *);
+void nes_cm_disconn_worker(void *);
+
+/* nes_verbs.c */
+int nes_hw_modify_qp(struct nes_device *, struct nes_qp *, u32, u32, u32);
+int nes_modify_qp(struct ib_qp *, struct ib_qp_attr *, int, struct ib_udata *);
+struct nes_ib_device *nes_init_ofa_device(struct net_device *);
+void  nes_port_ibevent(struct nes_vnic *nesvnic);
+void nes_destroy_ofa_device(struct nes_ib_device *);
+int nes_register_ofa_device(struct nes_ib_device *);
+
+/* nes_util.c */
+int nes_read_eeprom_values(struct nes_device *, struct nes_adapter *);
+void nes_write_1G_phy_reg(struct nes_device *, u8, u8, u16);
+void nes_read_1G_phy_reg(struct nes_device *, u8, u8, u16 *);
+void nes_write_10G_phy_reg(struct nes_device *, u16, u8, u16, u16);
+void nes_read_10G_phy_reg(struct nes_device *, u8, u8, u16);
+struct nes_cqp_request *nes_get_cqp_request(struct nes_device *);
+void nes_free_cqp_request(struct nes_device *nesdev,
+			  struct nes_cqp_request *cqp_request);
+void nes_put_cqp_request(struct nes_device *nesdev,
+			 struct nes_cqp_request *cqp_request);
+void nes_post_cqp_request(struct nes_device *, struct nes_cqp_request *);
+int nes_arp_table(struct nes_device *, u32, u8 *, u32);
+void nes_mh_fix(struct timer_list *t);
+void nes_clc(struct timer_list *t);
+void nes_dump_mem(unsigned int, void *, int);
+u32 nes_crc32(u32, u32, u32, u32, u8 *, u32, u32, u32);
+
+#endif	/* __NES_H */