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/*
* Copyright(c) 2015 - 2018 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef HFI1_VERBS_H
#define HFI1_VERBS_H
#include <linux/types.h>
#include <linux/seqlock.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/kref.h>
#include <linux/workqueue.h>
#include <linux/kthread.h>
#include <linux/completion.h>
#include <linux/slab.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_hdrs.h>
#include <rdma/rdma_vt.h>
#include <rdma/rdmavt_qp.h>
#include <rdma/rdmavt_cq.h>
struct hfi1_ctxtdata;
struct hfi1_pportdata;
struct hfi1_devdata;
struct hfi1_packet;
#include "iowait.h"
#include "tid_rdma.h"
#include "opfn.h"
#define HFI1_MAX_RDMA_ATOMIC 16
/*
* Increment this value if any changes that break userspace ABI
* compatibility are made.
*/
#define HFI1_UVERBS_ABI_VERSION 2
/* IB Performance Manager status values */
#define IB_PMA_SAMPLE_STATUS_DONE 0x00
#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
/* Mandatory IB performance counter select values. */
#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
#define OPA_BTH_MIG_REQ BIT(31)
#define RC_OP(x) IB_OPCODE_RC_##x
#define UC_OP(x) IB_OPCODE_UC_##x
/* flags passed by hfi1_ib_rcv() */
enum {
HFI1_HAS_GRH = (1 << 0),
};
#define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
#define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
#define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
#define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
/* 24Bits for qpn, upper 8Bits reserved */
struct opa_16b_mgmt {
__be32 dest_qpn;
__be32 src_qpn;
};
struct hfi1_16b_header {
u32 lrh[4];
union {
struct {
struct ib_grh grh;
struct ib_other_headers oth;
} l;
struct ib_other_headers oth;
struct opa_16b_mgmt mgmt;
} u;
} __packed;
struct hfi1_opa_header {
union {
struct ib_header ibh; /* 9B header */
struct hfi1_16b_header opah; /* 16B header */
};
u8 hdr_type; /* 9B or 16B */
} __packed;
struct hfi1_ahg_info {
u32 ahgdesc[2];
u16 tx_flags;
u8 ahgcount;
u8 ahgidx;
};
struct hfi1_sdma_header {
__le64 pbc;
struct hfi1_opa_header hdr;
} __packed;
/*
* hfi1 specific data structures that will be hidden from rvt after the queue
* pair is made common
*/
struct hfi1_qp_priv {
struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
struct sdma_engine *s_sde; /* current sde */
struct send_context *s_sendcontext; /* current sendcontext */
struct hfi1_ctxtdata *rcd; /* QP's receive context */
struct page **pages; /* for TID page scan */
u32 tid_enqueue; /* saved when tid waited */
u8 s_sc; /* SC[0..4] for next packet */
struct iowait s_iowait;
struct timer_list s_tid_timer; /* for timing tid wait */
struct timer_list s_tid_retry_timer; /* for timing tid ack */
struct list_head tid_wait; /* for queueing tid space */
struct hfi1_opfn_data opfn;
struct tid_flow_state flow_state;
struct tid_rdma_qp_params tid_rdma;
struct rvt_qp *owner;
u16 s_running_pkt_size;
u8 hdr_type; /* 9B or 16B */
struct rvt_sge_state tid_ss; /* SGE state pointer for 2nd leg */
atomic_t n_requests; /* # of TID RDMA requests in the */
/* queue */
atomic_t n_tid_requests; /* # of sent TID RDMA requests */
unsigned long tid_timer_timeout_jiffies;
unsigned long tid_retry_timeout_jiffies;
/* variables for the TID RDMA SE state machine */
u8 s_state;
u8 s_retry;
u8 rnr_nak_state; /* RNR NAK state */
u8 s_nak_state;
u32 s_nak_psn;
u32 s_flags;
u32 s_tid_cur;
u32 s_tid_head;
u32 s_tid_tail;
u32 r_tid_head; /* Most recently added TID RDMA request */
u32 r_tid_tail; /* the last completed TID RDMA request */
u32 r_tid_ack; /* the TID RDMA request to be ACK'ed */
u32 r_tid_alloc; /* Request for which we are allocating resources */
u32 pending_tid_w_segs; /* Num of pending tid write segments */
u32 pending_tid_w_resp; /* Num of pending tid write responses */
u32 alloc_w_segs; /* Number of segments for which write */
/* resources have been allocated for this QP */
/* For TID RDMA READ */
u32 tid_r_reqs; /* Num of tid reads requested */
u32 tid_r_comp; /* Num of tid reads completed */
u32 pending_tid_r_segs; /* Num of pending tid read segments */
u16 pkts_ps; /* packets per segment */
u8 timeout_shift; /* account for number of packets per segment */
u32 r_next_psn_kdeth;
u32 r_next_psn_kdeth_save;
u32 s_resync_psn;
u8 sync_pt; /* Set when QP reaches sync point */
u8 resync;
};
#define HFI1_QP_WQE_INVALID ((u32)-1)
struct hfi1_swqe_priv {
struct tid_rdma_request tid_req;
struct rvt_sge_state ss; /* Used for TID RDMA READ Request */
};
struct hfi1_ack_priv {
struct rvt_sge_state ss; /* used for TID WRITE RESP */
struct tid_rdma_request tid_req;
};
/*
* This structure is used to hold commonly lookedup and computed values during
* the send engine progress.
*/
struct iowait_work;
struct hfi1_pkt_state {
struct hfi1_ibdev *dev;
struct hfi1_ibport *ibp;
struct hfi1_pportdata *ppd;
struct verbs_txreq *s_txreq;
struct iowait_work *wait;
unsigned long flags;
unsigned long timeout;
unsigned long timeout_int;
int cpu;
u8 opcode;
bool in_thread;
bool pkts_sent;
};
#define HFI1_PSN_CREDIT 16
struct hfi1_opcode_stats {
u64 n_packets; /* number of packets */
u64 n_bytes; /* total number of bytes */
};
struct hfi1_opcode_stats_perctx {
struct hfi1_opcode_stats stats[256];
};
static inline void inc_opstats(
u32 tlen,
struct hfi1_opcode_stats *stats)
{
#ifdef CONFIG_DEBUG_FS
stats->n_bytes += tlen;
stats->n_packets++;
#endif
}
struct hfi1_ibport {
struct rvt_qp __rcu *qp[2];
struct rvt_ibport rvp;
/* the first 16 entries are sl_to_vl for !OPA */
u8 sl_to_sc[32];
u8 sc_to_sl[32];
};
struct hfi1_ibdev {
struct rvt_dev_info rdi; /* Must be first */
/* QP numbers are shared by all IB ports */
/* protect txwait list */
seqlock_t txwait_lock ____cacheline_aligned_in_smp;
struct list_head txwait; /* list for wait verbs_txreq */
struct list_head memwait; /* list for wait kernel memory */
struct kmem_cache *verbs_txreq_cache;
u64 n_txwait;
u64 n_kmem_wait;
u64 n_tidwait;
/* protect iowait lists */
seqlock_t iowait_lock ____cacheline_aligned_in_smp;
u64 n_piowait;
u64 n_piodrain;
struct timer_list mem_timer;
#ifdef CONFIG_DEBUG_FS
/* per HFI debugfs */
struct dentry *hfi1_ibdev_dbg;
/* per HFI symlinks to above */
struct dentry *hfi1_ibdev_link;
#ifdef CONFIG_FAULT_INJECTION
struct fault *fault;
#endif
#endif
};
static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
{
struct rvt_dev_info *rdi;
rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
return container_of(rdi, struct hfi1_ibdev, rdi);
}
static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
{
struct hfi1_qp_priv *priv;
priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
return priv->owner;
}
/*
* This must be called with s_lock held.
*/
void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
u32 qp1, u32 qp2, u32 lid1, u32 lid2);
void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
const struct ib_wc *in_wc, const struct ib_grh *in_grh,
const struct ib_mad_hdr *in_mad, size_t in_mad_size,
struct ib_mad_hdr *out_mad, size_t *out_mad_size,
u16 *out_mad_pkey_index);
/*
* The PSN_MASK and PSN_SHIFT allow for
* 1) comparing two PSNs
* 2) returning the PSN with any upper bits masked
* 3) returning the difference between to PSNs
*
* The number of significant bits in the PSN must
* necessarily be at least one bit less than
* the container holding the PSN.
*/
#define PSN_MASK 0x7FFFFFFF
#define PSN_SHIFT 1
#define PSN_MODIFY_MASK 0xFFFFFF
/*
* Compare two PSNs
* Returns an integer <, ==, or > than zero.
*/
static inline int cmp_psn(u32 a, u32 b)
{
return (((int)a) - ((int)b)) << PSN_SHIFT;
}
/*
* Return masked PSN
*/
static inline u32 mask_psn(u32 a)
{
return a & PSN_MASK;
}
/*
* Return delta between two PSNs
*/
static inline u32 delta_psn(u32 a, u32 b)
{
return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
}
static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
{
return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
}
static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
{
return &((struct hfi1_ack_priv *)e->priv)->tid_req;
}
/*
* Look through all the active flows for a TID RDMA request and find
* the one (if it exists) that contains the specified PSN.
*/
static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
{
return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
(psn & HFI1_KDETH_BTH_SEQ_MASK));
}
static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
{
return __full_flow_psn(&flow->flow_state, psn);
}
struct verbs_txreq;
void hfi1_put_txreq(struct verbs_txreq *tx);
int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
void hfi1_cnp_rcv(struct hfi1_packet *packet);
void hfi1_uc_rcv(struct hfi1_packet *packet);
void hfi1_rc_rcv(struct hfi1_packet *packet);
void hfi1_rc_hdrerr(
struct hfi1_ctxtdata *rcd,
struct hfi1_packet *packet,
struct rvt_qp *qp);
u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);
void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
void hfi1_ud_rcv(struct hfi1_packet *packet);
int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
void hfi1_migrate_qp(struct rvt_qp *qp);
int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
bool *call_send);
extern const u32 rc_only_opcode;
extern const u32 uc_only_opcode;
int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
const struct ib_global_route *grh, u32 hwords, u32 nwords);
void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
u32 bth0, u32 bth1, u32 bth2, int middle,
struct hfi1_pkt_state *ps);
bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
bool tid);
void _hfi1_do_send(struct work_struct *work);
void hfi1_do_send_from_rvt(struct rvt_qp *qp);
void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
int hfi1_register_ib_device(struct hfi1_devdata *);
void hfi1_unregister_ib_device(struct hfi1_devdata *);
void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
void hfi1_ib_rcv(struct hfi1_packet *packet);
void hfi1_16B_rcv(struct hfi1_packet *packet);
unsigned hfi1_get_npkeys(struct hfi1_devdata *);
int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
u64 pbc);
int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
u64 pbc);
static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
{
return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
}
void hfi1_wait_kmem(struct rvt_qp *qp);
static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
struct rvt_swqe *wqe,
enum ib_wc_status status)
{
trdma_clean_swqe(qp, wqe);
rvt_send_complete(qp, wqe, status);
}
extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
extern const u8 hdr_len_by_opcode[];
extern const int ib_rvt_state_ops[];
extern __be64 ib_hfi1_sys_image_guid; /* in network order */
extern unsigned int hfi1_max_cqes;
extern unsigned int hfi1_max_cqs;
extern unsigned int hfi1_max_qp_wrs;
extern unsigned int hfi1_max_qps;
extern unsigned int hfi1_max_sges;
extern unsigned int hfi1_max_mcast_grps;
extern unsigned int hfi1_max_mcast_qp_attached;
extern unsigned int hfi1_max_srqs;
extern unsigned int hfi1_max_srq_sges;
extern unsigned int hfi1_max_srq_wrs;
extern unsigned short piothreshold;
extern const u32 ib_hfi1_rnr_table[];
#endif /* HFI1_VERBS_H */