2 * Copyright(c) 2015, 2016 Intel Corporation.
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
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34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 #include <linux/types.h>
52 #include <linux/seqlock.h>
53 #include <linux/kernel.h>
54 #include <linux/interrupt.h>
55 #include <linux/kref.h>
56 #include <linux/workqueue.h>
57 #include <linux/kthread.h>
58 #include <linux/completion.h>
59 #include <linux/slab.h>
60 #include <rdma/ib_pack.h>
61 #include <rdma/ib_user_verbs.h>
62 #include <rdma/ib_mad.h>
63 #include <rdma/ib_hdrs.h>
64 #include <rdma/rdma_vt.h>
65 #include <rdma/rdmavt_qp.h>
66 #include <rdma/rdmavt_cq.h>
69 struct hfi1_pportdata;
75 #define HFI1_MAX_RDMA_ATOMIC 16
76 #define HFI1_GUIDS_PER_PORT 5
79 * Increment this value if any changes that break userspace ABI
80 * compatibility are made.
82 #define HFI1_UVERBS_ABI_VERSION 2
84 /* IB Performance Manager status values */
85 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
86 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
87 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
89 /* Mandatory IB performance counter select values. */
90 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
91 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
92 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
93 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
94 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
96 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
98 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
100 /* flags passed by hfi1_ib_rcv() */
102 HFI1_HAS_GRH = (1 << 0),
105 struct hfi1_ahg_info {
112 struct hfi1_sdma_header {
114 struct ib_header hdr;
118 * hfi1 specific data structures that will be hidden from rvt after the queue
119 * pair is made common
121 struct hfi1_qp_priv {
122 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
123 struct sdma_engine *s_sde; /* current sde */
124 struct send_context *s_sendcontext; /* current sendcontext */
125 u8 s_sc; /* SC[0..4] for next packet */
126 u8 r_adefered; /* number of acks defered */
127 struct iowait s_iowait;
128 struct timer_list s_rnr_timer;
129 struct rvt_qp *owner;
133 * This structure is used to hold commonly lookedup and computed values during
134 * the send engine progress.
136 struct hfi1_pkt_state {
137 struct hfi1_ibdev *dev;
138 struct hfi1_ibport *ibp;
139 struct hfi1_pportdata *ppd;
140 struct verbs_txreq *s_txreq;
144 #define HFI1_PSN_CREDIT 16
146 struct hfi1_opcode_stats {
147 u64 n_packets; /* number of packets */
148 u64 n_bytes; /* total number of bytes */
151 struct hfi1_opcode_stats_perctx {
152 struct hfi1_opcode_stats stats[256];
155 static inline void inc_opstats(
157 struct hfi1_opcode_stats *stats)
159 #ifdef CONFIG_DEBUG_FS
160 stats->n_bytes += tlen;
166 struct rvt_qp __rcu *qp[2];
167 struct rvt_ibport rvp;
169 __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */
171 /* the first 16 entries are sl_to_vl for !OPA */
177 struct rvt_dev_info rdi; /* Must be first */
179 /* QP numbers are shared by all IB ports */
180 /* protect wait lists */
181 seqlock_t iowait_lock;
182 struct list_head txwait; /* list for wait verbs_txreq */
183 struct list_head memwait; /* list for wait kernel memory */
184 struct list_head txreq_free;
185 struct kmem_cache *verbs_txreq_cache;
186 struct timer_list mem_timer;
193 #ifdef CONFIG_DEBUG_FS
194 /* per HFI debugfs */
195 struct dentry *hfi1_ibdev_dbg;
196 /* per HFI symlinks to above */
197 struct dentry *hfi1_ibdev_link;
201 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
203 struct rvt_dev_info *rdi;
205 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
206 return container_of(rdi, struct hfi1_ibdev, rdi);
209 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
211 struct hfi1_qp_priv *priv;
213 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
218 * Send if not busy or waiting for I/O and either
219 * a RC response is pending or we can process send work requests.
221 static inline int hfi1_send_ok(struct rvt_qp *qp)
223 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
224 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
225 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
229 * This must be called with s_lock held.
231 void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
232 u32 qp1, u32 qp2, u16 lid1, u16 lid2);
233 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
234 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
235 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
236 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
237 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
238 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
239 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
240 u16 *out_mad_pkey_index);
243 * The PSN_MASK and PSN_SHIFT allow for
244 * 1) comparing two PSNs
245 * 2) returning the PSN with any upper bits masked
246 * 3) returning the difference between to PSNs
248 * The number of significant bits in the PSN must
249 * necessarily be at least one bit less than
250 * the container holding the PSN.
252 #ifndef CONFIG_HFI1_VERBS_31BIT_PSN
253 #define PSN_MASK 0xFFFFFF
256 #define PSN_MASK 0x7FFFFFFF
259 #define PSN_MODIFY_MASK 0xFFFFFF
262 * Compare the lower 24 bits of the msn values.
263 * Returns an integer <, ==, or > than zero.
265 static inline int cmp_msn(u32 a, u32 b)
267 return (((int)a) - ((int)b)) << 8;
272 * Returns an integer <, ==, or > than zero.
274 static inline int cmp_psn(u32 a, u32 b)
276 return (((int)a) - ((int)b)) << PSN_SHIFT;
282 static inline u32 mask_psn(u32 a)
288 * Return delta between two PSNs
290 static inline u32 delta_psn(u32 a, u32 b)
292 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
296 void hfi1_put_txreq(struct verbs_txreq *tx);
298 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
300 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
301 int release, int copy_last);
303 void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release);
305 void hfi1_cnp_rcv(struct hfi1_packet *packet);
307 void hfi1_uc_rcv(struct hfi1_packet *packet);
309 void hfi1_rc_rcv(struct hfi1_packet *packet);
312 struct hfi1_ctxtdata *rcd,
313 struct ib_header *hdr,
317 u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
319 struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
321 void hfi1_rc_rnr_retry(unsigned long arg);
322 void hfi1_add_rnr_timer(struct rvt_qp *qp, u32 to);
323 void hfi1_rc_timeout(unsigned long arg);
324 void hfi1_del_timers_sync(struct rvt_qp *qp);
325 void hfi1_stop_rc_timers(struct rvt_qp *qp);
327 void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
329 void hfi1_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
331 void hfi1_ud_rcv(struct hfi1_packet *packet);
333 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
335 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
337 void hfi1_migrate_qp(struct rvt_qp *qp);
339 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
340 int attr_mask, struct ib_udata *udata);
342 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
343 int attr_mask, struct ib_udata *udata);
345 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
347 extern const u32 rc_only_opcode;
348 extern const u32 uc_only_opcode;
350 static inline u8 get_opcode(struct ib_header *h)
352 u16 lnh = be16_to_cpu(h->lrh[0]) & 3;
354 if (lnh == IB_LNH_IBA_LOCAL)
355 return be32_to_cpu(h->u.oth.bth[0]) >> 24;
357 return be32_to_cpu(h->u.l.oth.bth[0]) >> 24;
360 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr,
361 int has_grh, struct rvt_qp *qp, u32 bth0);
363 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
364 struct ib_global_route *grh, u32 hwords, u32 nwords);
366 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
367 u32 bth0, u32 bth2, int middle,
368 struct hfi1_pkt_state *ps);
370 void _hfi1_do_send(struct work_struct *work);
372 void hfi1_do_send(struct rvt_qp *qp);
374 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
375 enum ib_wc_status status);
377 void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn);
379 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
381 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
383 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
385 int hfi1_register_ib_device(struct hfi1_devdata *);
387 void hfi1_unregister_ib_device(struct hfi1_devdata *);
389 void hfi1_ib_rcv(struct hfi1_packet *packet);
391 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
393 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
396 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
399 int hfi1_wss_init(void);
400 void hfi1_wss_exit(void);
402 /* platform specific: return the lowest level cache (llc) size, in KiB */
403 static inline int wss_llc_size(void)
405 /* assume that the boot CPU value is universal for all CPUs */
406 return boot_cpu_data.x86_cache_size;
409 /* platform specific: cacheless copy */
410 static inline void cacheless_memcpy(void *dst, void *src, size_t n)
413 * Use the only available X64 cacheless copy. Add a __user cast
414 * to quiet sparse. The src agument is already in the kernel so
415 * there are no security issues. The extra fault recovery machinery
418 __copy_user_nocache(dst, (void __user *)src, n, 0);
421 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
423 extern const u8 hdr_len_by_opcode[];
425 extern const int ib_rvt_state_ops[];
427 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
429 extern unsigned int hfi1_max_cqes;
431 extern unsigned int hfi1_max_cqs;
433 extern unsigned int hfi1_max_qp_wrs;
435 extern unsigned int hfi1_max_qps;
437 extern unsigned int hfi1_max_sges;
439 extern unsigned int hfi1_max_mcast_grps;
441 extern unsigned int hfi1_max_mcast_qp_attached;
443 extern unsigned int hfi1_max_srqs;
445 extern unsigned int hfi1_max_srq_sges;
447 extern unsigned int hfi1_max_srq_wrs;
449 extern unsigned short piothreshold;
451 extern const u32 ib_hfi1_rnr_table[];
453 #endif /* HFI1_VERBS_H */