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-rw-r--r--drivers/infiniband/hw/hfi1/verbs.h530
1 files changed, 530 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h
new file mode 100644
index 000000000000..3ee223983b20
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -0,0 +1,530 @@
+/*
+ * 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 <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/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"
+
+#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 */