/* * Copyright(c) 2015, 2016 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct hfi1_ctxtdata; struct hfi1_pportdata; struct hfi1_devdata; struct hfi1_packet; #include "iowait.h" #define HFI1_MAX_RDMA_ATOMIC 16 #define HFI1_GUIDS_PER_PORT 5 /* * Increment this value if any changes that break userspace ABI * compatibility are made. */ #define HFI1_UVERBS_ABI_VERSION 2 #define IB_SEQ_NAK (3 << 29) /* AETH NAK opcode values */ #define IB_RNR_NAK 0x20 #define IB_NAK_PSN_ERROR 0x60 #define IB_NAK_INVALID_REQUEST 0x61 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 #define IB_NAK_INVALID_RD_REQUEST 0x64 /* 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_BTH_REQ_ACK BIT(31) #define IB_BTH_SOLICITED BIT(23) #define IB_BTH_MIG_REQ BIT(22) #define IB_GRH_VERSION 6 #define IB_GRH_VERSION_MASK 0xF #define IB_GRH_VERSION_SHIFT 28 #define IB_GRH_TCLASS_MASK 0xFF #define IB_GRH_TCLASS_SHIFT 20 #define IB_GRH_FLOW_MASK 0xFFFFF #define IB_GRH_FLOW_SHIFT 0 #define IB_GRH_NEXT_HDR 0x1B #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) /* flags passed by hfi1_ib_rcv() */ enum { HFI1_HAS_GRH = (1 << 0), }; struct ib_reth { __be64 vaddr; __be32 rkey; __be32 length; } __packed; struct ib_atomic_eth { __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */ __be32 rkey; __be64 swap_data; __be64 compare_data; } __packed; union ib_ehdrs { struct { __be32 deth[2]; __be32 imm_data; } ud; struct { struct ib_reth reth; __be32 imm_data; } rc; struct { __be32 aeth; __be32 atomic_ack_eth[2]; } at; __be32 imm_data; __be32 aeth; struct ib_atomic_eth atomic_eth; } __packed; struct hfi1_other_headers { __be32 bth[3]; union ib_ehdrs u; } __packed; /* * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes * long (72 w/ imm_data). Only the first 56 bytes of the IB header * will be in the eager header buffer. The remaining 12 or 16 bytes * are in the data buffer. */ struct hfi1_ib_header { __be16 lrh[4]; union { struct { struct ib_grh grh; struct hfi1_other_headers oth; } l; struct hfi1_other_headers oth; } u; } __packed; struct ahg_ib_header { struct sdma_engine *sde; u32 ahgdesc[2]; u16 tx_flags; u8 ahgcount; u8 ahgidx; struct hfi1_ib_header ibh; }; struct hfi1_pio_header { __le64 pbc; struct hfi1_ib_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 ahg_ib_header *s_hdr; /* next header to send */ struct sdma_engine *s_sde; /* current sde */ struct send_context *s_sendcontext; /* current sendcontext */ u8 s_sc; /* SC[0..4] for next packet */ u8 r_adefered; /* number of acks defered */ struct iowait s_iowait; struct timer_list s_rnr_timer; struct rvt_qp *owner; }; /* * This structure is used to hold commonly lookedup and computed values during * the send engine progress. */ struct hfi1_pkt_state { struct hfi1_ibdev *dev; struct hfi1_ibport *ibp; struct hfi1_pportdata *ppd; struct verbs_txreq *s_txreq; unsigned long flags; }; #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; __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */ /* 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 wait lists */ seqlock_t iowait_lock; struct list_head txwait; /* list for wait verbs_txreq */ struct list_head memwait; /* list for wait kernel memory */ struct list_head txreq_free; struct kmem_cache *verbs_txreq_cache; struct timer_list mem_timer; u64 n_piowait; u64 n_piodrain; u64 n_txwait; u64 n_kmem_wait; #ifdef CONFIG_DEBUG_FS /* per HFI debugfs */ struct dentry *hfi1_ibdev_dbg; /* per HFI symlinks to above */ struct dentry *hfi1_ibdev_link; #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; } /* * Send if not busy or waiting for I/O and either * a RC response is pending or we can process send work requests. */ static inline int hfi1_send_ok(struct rvt_qp *qp) { return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); } /* * This must be called with s_lock held. */ void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl, u32 qp1, u32 qp2, u16 lid1, u16 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. */ #ifndef CONFIG_HFI1_VERBS_31BIT_PSN #define PSN_MASK 0xFFFFFF #define PSN_SHIFT 8 #else #define PSN_MASK 0x7FFFFFFF #define PSN_SHIFT 1 #endif #define PSN_MODIFY_MASK 0xFFFFFF /* * Compare the lower 24 bits of the msn values. * Returns an integer <, ==, or > than zero. */ static inline int cmp_msn(u32 a, u32 b) { return (((int)a) - ((int)b)) << 8; } /* * 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; } 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_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, int release, int copy_last); void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release); 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_ib_header *hdr, u32 rcv_flags, struct rvt_qp *qp); u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid); void hfi1_rc_rnr_retry(unsigned long arg); void hfi1_add_rnr_timer(struct rvt_qp *qp, u32 to); void hfi1_rc_timeout(unsigned long arg); void hfi1_del_timers_sync(struct rvt_qp *qp); void hfi1_stop_rc_timers(struct rvt_qp *qp); void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_ib_header *hdr); void hfi1_rc_error(struct rvt_qp *qp, enum ib_wc_status err); void hfi1_ud_rcv(struct hfi1_packet *packet); int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey); int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only); 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); int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe); extern const u32 rc_only_opcode; extern const u32 uc_only_opcode; static inline u8 get_opcode(struct hfi1_ib_header *h) { u16 lnh = be16_to_cpu(h->lrh[0]) & 3; if (lnh == IB_LNH_IBA_LOCAL) return be32_to_cpu(h->u.oth.bth[0]) >> 24; else return be32_to_cpu(h->u.l.oth.bth[0]) >> 24; } int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr, int has_grh, struct rvt_qp *qp, u32 bth0); u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr, struct ib_global_route *grh, u32 hwords, u32 nwords); void hfi1_make_ruc_header(struct rvt_qp *qp, struct hfi1_other_headers *ohdr, u32 bth0, u32 bth2, int middle, struct hfi1_pkt_state *ps); void _hfi1_do_send(struct work_struct *work); void hfi1_do_send(struct rvt_qp *qp); void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, enum ib_wc_status status); void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int 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_ib_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); int hfi1_wss_init(void); void hfi1_wss_exit(void); /* platform specific: return the lowest level cache (llc) size, in KiB */ static inline int wss_llc_size(void) { /* assume that the boot CPU value is universal for all CPUs */ return boot_cpu_data.x86_cache_size; } /* platform specific: cacheless copy */ static inline void cacheless_memcpy(void *dst, void *src, size_t n) { /* * Use the only available X64 cacheless copy. Add a __user cast * to quiet sparse. The src agument is already in the kernel so * there are no security issues. The extra fault recovery machinery * is not invoked. */ __copy_user_nocache(dst, (void __user *)src, n, 0); } 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 */