1f48ad614SDennis Dalessandro /* 2d4829ea6SVishwanathapura, Niranjana * Copyright(c) 2015-2017 Intel Corporation. 3f48ad614SDennis Dalessandro * 4f48ad614SDennis Dalessandro * This file is provided under a dual BSD/GPLv2 license. When using or 5f48ad614SDennis Dalessandro * redistributing this file, you may do so under either license. 6f48ad614SDennis Dalessandro * 7f48ad614SDennis Dalessandro * GPL LICENSE SUMMARY 8f48ad614SDennis Dalessandro * 9f48ad614SDennis Dalessandro * This program is free software; you can redistribute it and/or modify 10f48ad614SDennis Dalessandro * it under the terms of version 2 of the GNU General Public License as 11f48ad614SDennis Dalessandro * published by the Free Software Foundation. 12f48ad614SDennis Dalessandro * 13f48ad614SDennis Dalessandro * This program is distributed in the hope that it will be useful, but 14f48ad614SDennis Dalessandro * WITHOUT ANY WARRANTY; without even the implied warranty of 15f48ad614SDennis Dalessandro * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16f48ad614SDennis Dalessandro * General Public License for more details. 17f48ad614SDennis Dalessandro * 18f48ad614SDennis Dalessandro * BSD LICENSE 19f48ad614SDennis Dalessandro * 20f48ad614SDennis Dalessandro * Redistribution and use in source and binary forms, with or without 21f48ad614SDennis Dalessandro * modification, are permitted provided that the following conditions 22f48ad614SDennis Dalessandro * are met: 23f48ad614SDennis Dalessandro * 24f48ad614SDennis Dalessandro * - Redistributions of source code must retain the above copyright 25f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer. 26f48ad614SDennis Dalessandro * - Redistributions in binary form must reproduce the above copyright 27f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer in 28f48ad614SDennis Dalessandro * the documentation and/or other materials provided with the 29f48ad614SDennis Dalessandro * distribution. 30f48ad614SDennis Dalessandro * - Neither the name of Intel Corporation nor the names of its 31f48ad614SDennis Dalessandro * contributors may be used to endorse or promote products derived 32f48ad614SDennis Dalessandro * from this software without specific prior written permission. 33f48ad614SDennis Dalessandro * 34f48ad614SDennis Dalessandro * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35f48ad614SDennis Dalessandro * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36f48ad614SDennis Dalessandro * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37f48ad614SDennis Dalessandro * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38f48ad614SDennis Dalessandro * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39f48ad614SDennis Dalessandro * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40f48ad614SDennis Dalessandro * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41f48ad614SDennis Dalessandro * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42f48ad614SDennis Dalessandro * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43f48ad614SDennis Dalessandro * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44f48ad614SDennis Dalessandro * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45f48ad614SDennis Dalessandro * 46f48ad614SDennis Dalessandro */ 47f48ad614SDennis Dalessandro 48f48ad614SDennis Dalessandro #include <linux/spinlock.h> 49f48ad614SDennis Dalessandro #include <linux/pci.h> 50f48ad614SDennis Dalessandro #include <linux/io.h> 51f48ad614SDennis Dalessandro #include <linux/delay.h> 52f48ad614SDennis Dalessandro #include <linux/netdevice.h> 53f48ad614SDennis Dalessandro #include <linux/vmalloc.h> 54f48ad614SDennis Dalessandro #include <linux/module.h> 55f48ad614SDennis Dalessandro #include <linux/prefetch.h> 56f48ad614SDennis Dalessandro #include <rdma/ib_verbs.h> 57f48ad614SDennis Dalessandro 58f48ad614SDennis Dalessandro #include "hfi.h" 59f48ad614SDennis Dalessandro #include "trace.h" 60f48ad614SDennis Dalessandro #include "qp.h" 61f48ad614SDennis Dalessandro #include "sdma.h" 620181ce31SDon Hiatt #include "debugfs.h" 63d4829ea6SVishwanathapura, Niranjana #include "vnic.h" 64f48ad614SDennis Dalessandro 65f48ad614SDennis Dalessandro #undef pr_fmt 66f48ad614SDennis Dalessandro #define pr_fmt(fmt) DRIVER_NAME ": " fmt 67f48ad614SDennis Dalessandro 68f48ad614SDennis Dalessandro /* 69f48ad614SDennis Dalessandro * The size has to be longer than this string, so we can append 70f48ad614SDennis Dalessandro * board/chip information to it in the initialization code. 71f48ad614SDennis Dalessandro */ 72f48ad614SDennis Dalessandro const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n"; 73f48ad614SDennis Dalessandro 74f48ad614SDennis Dalessandro DEFINE_SPINLOCK(hfi1_devs_lock); 75f48ad614SDennis Dalessandro LIST_HEAD(hfi1_dev_list); 76f48ad614SDennis Dalessandro DEFINE_MUTEX(hfi1_mutex); /* general driver use */ 77f48ad614SDennis Dalessandro 78f48ad614SDennis Dalessandro unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU; 79f48ad614SDennis Dalessandro module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO); 80f48ad614SDennis Dalessandro MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is " __stringify( 81f48ad614SDennis Dalessandro HFI1_DEFAULT_MAX_MTU)); 82f48ad614SDennis Dalessandro 83f48ad614SDennis Dalessandro unsigned int hfi1_cu = 1; 84f48ad614SDennis Dalessandro module_param_named(cu, hfi1_cu, uint, S_IRUGO); 85f48ad614SDennis Dalessandro MODULE_PARM_DESC(cu, "Credit return units"); 86f48ad614SDennis Dalessandro 87f48ad614SDennis Dalessandro unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT; 88f4cd8765SMichael J. Ruhl static int hfi1_caps_set(const char *val, const struct kernel_param *kp); 89f4cd8765SMichael J. Ruhl static int hfi1_caps_get(char *buffer, const struct kernel_param *kp); 90f48ad614SDennis Dalessandro static const struct kernel_param_ops cap_ops = { 91f48ad614SDennis Dalessandro .set = hfi1_caps_set, 92f48ad614SDennis Dalessandro .get = hfi1_caps_get 93f48ad614SDennis Dalessandro }; 94f48ad614SDennis Dalessandro module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO); 95f48ad614SDennis Dalessandro MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features"); 96f48ad614SDennis Dalessandro 97f48ad614SDennis Dalessandro MODULE_LICENSE("Dual BSD/GPL"); 98f48ad614SDennis Dalessandro MODULE_DESCRIPTION("Intel Omni-Path Architecture driver"); 99f48ad614SDennis Dalessandro MODULE_VERSION(HFI1_DRIVER_VERSION); 100f48ad614SDennis Dalessandro 101f48ad614SDennis Dalessandro /* 102f48ad614SDennis Dalessandro * MAX_PKT_RCV is the max # if packets processed per receive interrupt. 103f48ad614SDennis Dalessandro */ 104f48ad614SDennis Dalessandro #define MAX_PKT_RECV 64 105a82a7fcdSMike Marciniszyn /* 106a82a7fcdSMike Marciniszyn * MAX_PKT_THREAD_RCV is the max # of packets processed before 107a82a7fcdSMike Marciniszyn * the qp_wait_list queue is flushed. 108a82a7fcdSMike Marciniszyn */ 109a82a7fcdSMike Marciniszyn #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4) 110f48ad614SDennis Dalessandro #define EGR_HEAD_UPDATE_THRESHOLD 16 111f48ad614SDennis Dalessandro 112f48ad614SDennis Dalessandro struct hfi1_ib_stats hfi1_stats; 113f48ad614SDennis Dalessandro 114f48ad614SDennis Dalessandro static int hfi1_caps_set(const char *val, const struct kernel_param *kp) 115f48ad614SDennis Dalessandro { 116f48ad614SDennis Dalessandro int ret = 0; 117f48ad614SDennis Dalessandro unsigned long *cap_mask_ptr = (unsigned long *)kp->arg, 118f48ad614SDennis Dalessandro cap_mask = *cap_mask_ptr, value, diff, 119f48ad614SDennis Dalessandro write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) | 120f48ad614SDennis Dalessandro HFI1_CAP_WRITABLE_MASK); 121f48ad614SDennis Dalessandro 122f48ad614SDennis Dalessandro ret = kstrtoul(val, 0, &value); 123f48ad614SDennis Dalessandro if (ret) { 124f48ad614SDennis Dalessandro pr_warn("Invalid module parameter value for 'cap_mask'\n"); 125f48ad614SDennis Dalessandro goto done; 126f48ad614SDennis Dalessandro } 127f48ad614SDennis Dalessandro /* Get the changed bits (except the locked bit) */ 128f48ad614SDennis Dalessandro diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK); 129f48ad614SDennis Dalessandro 130f48ad614SDennis Dalessandro /* Remove any bits that are not allowed to change after driver load */ 131f48ad614SDennis Dalessandro if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) { 132f48ad614SDennis Dalessandro pr_warn("Ignoring non-writable capability bits %#lx\n", 133f48ad614SDennis Dalessandro diff & ~write_mask); 134f48ad614SDennis Dalessandro diff &= write_mask; 135f48ad614SDennis Dalessandro } 136f48ad614SDennis Dalessandro 137f48ad614SDennis Dalessandro /* Mask off any reserved bits */ 138f48ad614SDennis Dalessandro diff &= ~HFI1_CAP_RESERVED_MASK; 139f48ad614SDennis Dalessandro /* Clear any previously set and changing bits */ 140f48ad614SDennis Dalessandro cap_mask &= ~diff; 141f48ad614SDennis Dalessandro /* Update the bits with the new capability */ 142f48ad614SDennis Dalessandro cap_mask |= (value & diff); 143f48ad614SDennis Dalessandro /* Check for any kernel/user restrictions */ 144f48ad614SDennis Dalessandro diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^ 145f48ad614SDennis Dalessandro ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT); 146f48ad614SDennis Dalessandro cap_mask &= ~diff; 147f48ad614SDennis Dalessandro /* Set the bitmask to the final set */ 148f48ad614SDennis Dalessandro *cap_mask_ptr = cap_mask; 149f48ad614SDennis Dalessandro done: 150f48ad614SDennis Dalessandro return ret; 151f48ad614SDennis Dalessandro } 152f48ad614SDennis Dalessandro 153f48ad614SDennis Dalessandro static int hfi1_caps_get(char *buffer, const struct kernel_param *kp) 154f48ad614SDennis Dalessandro { 155f48ad614SDennis Dalessandro unsigned long cap_mask = *(unsigned long *)kp->arg; 156f48ad614SDennis Dalessandro 157f48ad614SDennis Dalessandro cap_mask &= ~HFI1_CAP_LOCKED_SMASK; 158f48ad614SDennis Dalessandro cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT); 159f48ad614SDennis Dalessandro 160f48ad614SDennis Dalessandro return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask); 161f48ad614SDennis Dalessandro } 162f48ad614SDennis Dalessandro 163f48ad614SDennis Dalessandro const char *get_unit_name(int unit) 164f48ad614SDennis Dalessandro { 165f48ad614SDennis Dalessandro static char iname[16]; 166f48ad614SDennis Dalessandro 167f48ad614SDennis Dalessandro snprintf(iname, sizeof(iname), DRIVER_NAME "_%u", unit); 168f48ad614SDennis Dalessandro return iname; 169f48ad614SDennis Dalessandro } 170f48ad614SDennis Dalessandro 171f48ad614SDennis Dalessandro const char *get_card_name(struct rvt_dev_info *rdi) 172f48ad614SDennis Dalessandro { 173f48ad614SDennis Dalessandro struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); 174f48ad614SDennis Dalessandro struct hfi1_devdata *dd = container_of(ibdev, 175f48ad614SDennis Dalessandro struct hfi1_devdata, verbs_dev); 176f48ad614SDennis Dalessandro return get_unit_name(dd->unit); 177f48ad614SDennis Dalessandro } 178f48ad614SDennis Dalessandro 179f48ad614SDennis Dalessandro struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi) 180f48ad614SDennis Dalessandro { 181f48ad614SDennis Dalessandro struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); 182f48ad614SDennis Dalessandro struct hfi1_devdata *dd = container_of(ibdev, 183f48ad614SDennis Dalessandro struct hfi1_devdata, verbs_dev); 184f48ad614SDennis Dalessandro return dd->pcidev; 185f48ad614SDennis Dalessandro } 186f48ad614SDennis Dalessandro 187f48ad614SDennis Dalessandro /* 188f48ad614SDennis Dalessandro * Return count of units with at least one port ACTIVE. 189f48ad614SDennis Dalessandro */ 190f48ad614SDennis Dalessandro int hfi1_count_active_units(void) 191f48ad614SDennis Dalessandro { 192f48ad614SDennis Dalessandro struct hfi1_devdata *dd; 193f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 194f48ad614SDennis Dalessandro unsigned long flags; 195f48ad614SDennis Dalessandro int pidx, nunits_active = 0; 196f48ad614SDennis Dalessandro 197f48ad614SDennis Dalessandro spin_lock_irqsave(&hfi1_devs_lock, flags); 198f48ad614SDennis Dalessandro list_for_each_entry(dd, &hfi1_dev_list, list) { 199f48ad614SDennis Dalessandro if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase) 200f48ad614SDennis Dalessandro continue; 201f48ad614SDennis Dalessandro for (pidx = 0; pidx < dd->num_pports; ++pidx) { 202f48ad614SDennis Dalessandro ppd = dd->pport + pidx; 203f48ad614SDennis Dalessandro if (ppd->lid && ppd->linkup) { 204f48ad614SDennis Dalessandro nunits_active++; 205f48ad614SDennis Dalessandro break; 206f48ad614SDennis Dalessandro } 207f48ad614SDennis Dalessandro } 208f48ad614SDennis Dalessandro } 209f48ad614SDennis Dalessandro spin_unlock_irqrestore(&hfi1_devs_lock, flags); 210f48ad614SDennis Dalessandro return nunits_active; 211f48ad614SDennis Dalessandro } 212f48ad614SDennis Dalessandro 213f48ad614SDennis Dalessandro /* 214f48ad614SDennis Dalessandro * Get address of eager buffer from it's index (allocated in chunks, not 215f48ad614SDennis Dalessandro * contiguous). 216f48ad614SDennis Dalessandro */ 217f48ad614SDennis Dalessandro static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf, 218f48ad614SDennis Dalessandro u8 *update) 219f48ad614SDennis Dalessandro { 220f48ad614SDennis Dalessandro u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf); 221f48ad614SDennis Dalessandro 222f48ad614SDennis Dalessandro *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset; 223f48ad614SDennis Dalessandro return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) + 224f48ad614SDennis Dalessandro (offset * RCV_BUF_BLOCK_SIZE)); 225f48ad614SDennis Dalessandro } 226f48ad614SDennis Dalessandro 227f48ad614SDennis Dalessandro /* 228f48ad614SDennis Dalessandro * Validate and encode the a given RcvArray Buffer size. 229f48ad614SDennis Dalessandro * The function will check whether the given size falls within 230f48ad614SDennis Dalessandro * allowed size ranges for the respective type and, optionally, 231f48ad614SDennis Dalessandro * return the proper encoding. 232f48ad614SDennis Dalessandro */ 233a82a7fcdSMike Marciniszyn int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded) 234f48ad614SDennis Dalessandro { 235f48ad614SDennis Dalessandro if (unlikely(!PAGE_ALIGNED(size))) 236f48ad614SDennis Dalessandro return 0; 237f48ad614SDennis Dalessandro if (unlikely(size < MIN_EAGER_BUFFER)) 238f48ad614SDennis Dalessandro return 0; 239f48ad614SDennis Dalessandro if (size > 240f48ad614SDennis Dalessandro (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER)) 241f48ad614SDennis Dalessandro return 0; 242f48ad614SDennis Dalessandro if (encoded) 243f48ad614SDennis Dalessandro *encoded = ilog2(size / PAGE_SIZE) + 1; 244f48ad614SDennis Dalessandro return 1; 245f48ad614SDennis Dalessandro } 246f48ad614SDennis Dalessandro 247f48ad614SDennis Dalessandro static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd, 248f48ad614SDennis Dalessandro struct hfi1_packet *packet) 249f48ad614SDennis Dalessandro { 250261a4351SMike Marciniszyn struct ib_header *rhdr = packet->hdr; 251f48ad614SDennis Dalessandro u32 rte = rhf_rcv_type_err(packet->rhf); 252cb427057SDon Hiatt int lnh = ib_get_lnh(rhdr); 253f3e862cbSSebastian Sanchez struct hfi1_ibport *ibp = rcd_to_iport(rcd); 254f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 255f48ad614SDennis Dalessandro struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 256f48ad614SDennis Dalessandro 257f48ad614SDennis Dalessandro if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR)) 258f48ad614SDennis Dalessandro return; 259f48ad614SDennis Dalessandro 260f48ad614SDennis Dalessandro if (packet->rhf & RHF_TID_ERR) { 261f48ad614SDennis Dalessandro /* For TIDERR and RC QPs preemptively schedule a NAK */ 262261a4351SMike Marciniszyn struct ib_other_headers *ohdr = NULL; 263f48ad614SDennis Dalessandro u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */ 264cb427057SDon Hiatt u16 lid = ib_get_dlid(rhdr); 265f48ad614SDennis Dalessandro u32 qp_num; 266f48ad614SDennis Dalessandro u32 rcv_flags = 0; 267f48ad614SDennis Dalessandro 268f48ad614SDennis Dalessandro /* Sanity check packet */ 269f48ad614SDennis Dalessandro if (tlen < 24) 270f48ad614SDennis Dalessandro goto drop; 271f48ad614SDennis Dalessandro 272f48ad614SDennis Dalessandro /* Check for GRH */ 273f48ad614SDennis Dalessandro if (lnh == HFI1_LRH_BTH) { 274261a4351SMike Marciniszyn ohdr = &rhdr->u.oth; 275f48ad614SDennis Dalessandro } else if (lnh == HFI1_LRH_GRH) { 276f48ad614SDennis Dalessandro u32 vtf; 277f48ad614SDennis Dalessandro 278261a4351SMike Marciniszyn ohdr = &rhdr->u.l.oth; 279261a4351SMike Marciniszyn if (rhdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR) 280f48ad614SDennis Dalessandro goto drop; 281261a4351SMike Marciniszyn vtf = be32_to_cpu(rhdr->u.l.grh.version_tclass_flow); 282f48ad614SDennis Dalessandro if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 283f48ad614SDennis Dalessandro goto drop; 284f48ad614SDennis Dalessandro rcv_flags |= HFI1_HAS_GRH; 285f48ad614SDennis Dalessandro } else { 286f48ad614SDennis Dalessandro goto drop; 287f48ad614SDennis Dalessandro } 288f48ad614SDennis Dalessandro /* Get the destination QP number. */ 289f48ad614SDennis Dalessandro qp_num = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK; 290f48ad614SDennis Dalessandro if (lid < be16_to_cpu(IB_MULTICAST_LID_BASE)) { 291f48ad614SDennis Dalessandro struct rvt_qp *qp; 292f48ad614SDennis Dalessandro unsigned long flags; 293f48ad614SDennis Dalessandro 294f48ad614SDennis Dalessandro rcu_read_lock(); 295f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num); 296f48ad614SDennis Dalessandro if (!qp) { 297f48ad614SDennis Dalessandro rcu_read_unlock(); 298f48ad614SDennis Dalessandro goto drop; 299f48ad614SDennis Dalessandro } 300f48ad614SDennis Dalessandro 301f48ad614SDennis Dalessandro /* 302f48ad614SDennis Dalessandro * Handle only RC QPs - for other QP types drop error 303f48ad614SDennis Dalessandro * packet. 304f48ad614SDennis Dalessandro */ 305f48ad614SDennis Dalessandro spin_lock_irqsave(&qp->r_lock, flags); 306f48ad614SDennis Dalessandro 307f48ad614SDennis Dalessandro /* Check for valid receive state. */ 308f48ad614SDennis Dalessandro if (!(ib_rvt_state_ops[qp->state] & 309f48ad614SDennis Dalessandro RVT_PROCESS_RECV_OK)) { 310f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 311f48ad614SDennis Dalessandro } 312f48ad614SDennis Dalessandro 313f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 314f48ad614SDennis Dalessandro case IB_QPT_RC: 315f48ad614SDennis Dalessandro hfi1_rc_hdrerr( 316f48ad614SDennis Dalessandro rcd, 317261a4351SMike Marciniszyn rhdr, 318f48ad614SDennis Dalessandro rcv_flags, 319f48ad614SDennis Dalessandro qp); 320f48ad614SDennis Dalessandro break; 321f48ad614SDennis Dalessandro default: 322f48ad614SDennis Dalessandro /* For now don't handle any other QP types */ 323f48ad614SDennis Dalessandro break; 324f48ad614SDennis Dalessandro } 325f48ad614SDennis Dalessandro 326f48ad614SDennis Dalessandro spin_unlock_irqrestore(&qp->r_lock, flags); 327f48ad614SDennis Dalessandro rcu_read_unlock(); 328f48ad614SDennis Dalessandro } /* Unicast QP */ 329f48ad614SDennis Dalessandro } /* Valid packet with TIDErr */ 330f48ad614SDennis Dalessandro 331f48ad614SDennis Dalessandro /* handle "RcvTypeErr" flags */ 332f48ad614SDennis Dalessandro switch (rte) { 333f48ad614SDennis Dalessandro case RHF_RTE_ERROR_OP_CODE_ERR: 334f48ad614SDennis Dalessandro { 335f48ad614SDennis Dalessandro u32 opcode; 336f48ad614SDennis Dalessandro void *ebuf = NULL; 337f48ad614SDennis Dalessandro __be32 *bth = NULL; 338f48ad614SDennis Dalessandro 339f48ad614SDennis Dalessandro if (rhf_use_egr_bfr(packet->rhf)) 340f48ad614SDennis Dalessandro ebuf = packet->ebuf; 341f48ad614SDennis Dalessandro 342f48ad614SDennis Dalessandro if (!ebuf) 343f48ad614SDennis Dalessandro goto drop; /* this should never happen */ 344f48ad614SDennis Dalessandro 345f48ad614SDennis Dalessandro if (lnh == HFI1_LRH_BTH) 346f48ad614SDennis Dalessandro bth = (__be32 *)ebuf; 347f48ad614SDennis Dalessandro else if (lnh == HFI1_LRH_GRH) 348f48ad614SDennis Dalessandro bth = (__be32 *)((char *)ebuf + sizeof(struct ib_grh)); 349f48ad614SDennis Dalessandro else 350f48ad614SDennis Dalessandro goto drop; 351f48ad614SDennis Dalessandro 352f48ad614SDennis Dalessandro opcode = be32_to_cpu(bth[0]) >> 24; 353f48ad614SDennis Dalessandro opcode &= 0xff; 354f48ad614SDennis Dalessandro 355f48ad614SDennis Dalessandro if (opcode == IB_OPCODE_CNP) { 356f48ad614SDennis Dalessandro /* 357f48ad614SDennis Dalessandro * Only in pre-B0 h/w is the CNP_OPCODE handled 358f48ad614SDennis Dalessandro * via this code path. 359f48ad614SDennis Dalessandro */ 360f48ad614SDennis Dalessandro struct rvt_qp *qp = NULL; 361f48ad614SDennis Dalessandro u32 lqpn, rqpn; 362f48ad614SDennis Dalessandro u16 rlid; 363f48ad614SDennis Dalessandro u8 svc_type, sl, sc5; 364f48ad614SDennis Dalessandro 365aad559c2SDasaratharaman Chandramouli sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf); 366f48ad614SDennis Dalessandro sl = ibp->sc_to_sl[sc5]; 367f48ad614SDennis Dalessandro 368f48ad614SDennis Dalessandro lqpn = be32_to_cpu(bth[1]) & RVT_QPN_MASK; 369f48ad614SDennis Dalessandro rcu_read_lock(); 370f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn); 371f48ad614SDennis Dalessandro if (!qp) { 372f48ad614SDennis Dalessandro rcu_read_unlock(); 373f48ad614SDennis Dalessandro goto drop; 374f48ad614SDennis Dalessandro } 375f48ad614SDennis Dalessandro 376f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 377f48ad614SDennis Dalessandro case IB_QPT_UD: 378f48ad614SDennis Dalessandro rlid = 0; 379f48ad614SDennis Dalessandro rqpn = 0; 380f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UD; 381f48ad614SDennis Dalessandro break; 382f48ad614SDennis Dalessandro case IB_QPT_UC: 383cb427057SDon Hiatt rlid = ib_get_slid(rhdr); 384f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 385f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UC; 386f48ad614SDennis Dalessandro break; 387f48ad614SDennis Dalessandro default: 388f48ad614SDennis Dalessandro goto drop; 389f48ad614SDennis Dalessandro } 390f48ad614SDennis Dalessandro 391f48ad614SDennis Dalessandro process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); 392f48ad614SDennis Dalessandro rcu_read_unlock(); 393f48ad614SDennis Dalessandro } 394f48ad614SDennis Dalessandro 395f48ad614SDennis Dalessandro packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK; 396f48ad614SDennis Dalessandro break; 397f48ad614SDennis Dalessandro } 398f48ad614SDennis Dalessandro default: 399f48ad614SDennis Dalessandro break; 400f48ad614SDennis Dalessandro } 401f48ad614SDennis Dalessandro 402f48ad614SDennis Dalessandro drop: 403f48ad614SDennis Dalessandro return; 404f48ad614SDennis Dalessandro } 405f48ad614SDennis Dalessandro 406f48ad614SDennis Dalessandro static inline void init_packet(struct hfi1_ctxtdata *rcd, 407f48ad614SDennis Dalessandro struct hfi1_packet *packet) 408f48ad614SDennis Dalessandro { 409f48ad614SDennis Dalessandro packet->rsize = rcd->rcvhdrqentsize; /* words */ 410f48ad614SDennis Dalessandro packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */ 411f48ad614SDennis Dalessandro packet->rcd = rcd; 412f48ad614SDennis Dalessandro packet->updegr = 0; 413f48ad614SDennis Dalessandro packet->etail = -1; 414f48ad614SDennis Dalessandro packet->rhf_addr = get_rhf_addr(rcd); 415f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 416f48ad614SDennis Dalessandro packet->rhqoff = rcd->head; 417f48ad614SDennis Dalessandro packet->numpkt = 0; 418f48ad614SDennis Dalessandro packet->rcv_flags = 0; 419f48ad614SDennis Dalessandro } 420f48ad614SDennis Dalessandro 4215fd2b562SMitko Haralanov void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt, 4225fd2b562SMitko Haralanov bool do_cnp) 423f48ad614SDennis Dalessandro { 424f48ad614SDennis Dalessandro struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); 425261a4351SMike Marciniszyn struct ib_header *hdr = pkt->hdr; 426261a4351SMike Marciniszyn struct ib_other_headers *ohdr = pkt->ohdr; 4275fd2b562SMitko Haralanov struct ib_grh *grh = NULL; 4285fd2b562SMitko Haralanov u32 rqpn = 0, bth1; 429cb427057SDon Hiatt u16 rlid, dlid = ib_get_dlid(hdr); 4305fd2b562SMitko Haralanov u8 sc, svc_type; 4315fd2b562SMitko Haralanov bool is_mcast = false; 4325fd2b562SMitko Haralanov 4335fd2b562SMitko Haralanov if (pkt->rcv_flags & HFI1_HAS_GRH) 4345fd2b562SMitko Haralanov grh = &hdr->u.l.grh; 435f48ad614SDennis Dalessandro 436f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 437f48ad614SDennis Dalessandro case IB_QPT_SMI: 438f48ad614SDennis Dalessandro case IB_QPT_GSI: 439f48ad614SDennis Dalessandro case IB_QPT_UD: 440cb427057SDon Hiatt rlid = ib_get_slid(hdr); 441f48ad614SDennis Dalessandro rqpn = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK; 442f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UD; 4435fd2b562SMitko Haralanov is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && 4445fd2b562SMitko Haralanov (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); 445f48ad614SDennis Dalessandro break; 446f48ad614SDennis Dalessandro case IB_QPT_UC: 447d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 448f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 449f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UC; 450f48ad614SDennis Dalessandro break; 451f48ad614SDennis Dalessandro case IB_QPT_RC: 452d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 453f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 454f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_RC; 455f48ad614SDennis Dalessandro break; 456f48ad614SDennis Dalessandro default: 457f48ad614SDennis Dalessandro return; 458f48ad614SDennis Dalessandro } 459f48ad614SDennis Dalessandro 460aad559c2SDasaratharaman Chandramouli sc = hfi1_9B_get_sc5(hdr, pkt->rhf); 461f48ad614SDennis Dalessandro 4625fd2b562SMitko Haralanov bth1 = be32_to_cpu(ohdr->bth[1]); 4633d591099SDon Hiatt if (do_cnp && (bth1 & IB_FECN_SMASK)) { 464f48ad614SDennis Dalessandro u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]); 465f48ad614SDennis Dalessandro 4665fd2b562SMitko Haralanov return_cnp(ibp, qp, rqpn, pkey, dlid, rlid, sc, grh); 467f48ad614SDennis Dalessandro } 468f48ad614SDennis Dalessandro 4693d591099SDon Hiatt if (!is_mcast && (bth1 & IB_BECN_SMASK)) { 470f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 471f48ad614SDennis Dalessandro u32 lqpn = bth1 & RVT_QPN_MASK; 4725fd2b562SMitko Haralanov u8 sl = ibp->sc_to_sl[sc]; 473f48ad614SDennis Dalessandro 474f48ad614SDennis Dalessandro process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); 475f48ad614SDennis Dalessandro } 4765fd2b562SMitko Haralanov 477f48ad614SDennis Dalessandro } 478f48ad614SDennis Dalessandro 479f48ad614SDennis Dalessandro struct ps_mdata { 480f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd; 481f48ad614SDennis Dalessandro u32 rsize; 482f48ad614SDennis Dalessandro u32 maxcnt; 483f48ad614SDennis Dalessandro u32 ps_head; 484f48ad614SDennis Dalessandro u32 ps_tail; 485f48ad614SDennis Dalessandro u32 ps_seq; 486f48ad614SDennis Dalessandro }; 487f48ad614SDennis Dalessandro 488f48ad614SDennis Dalessandro static inline void init_ps_mdata(struct ps_mdata *mdata, 489f48ad614SDennis Dalessandro struct hfi1_packet *packet) 490f48ad614SDennis Dalessandro { 491f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 492f48ad614SDennis Dalessandro 493f48ad614SDennis Dalessandro mdata->rcd = rcd; 494f48ad614SDennis Dalessandro mdata->rsize = packet->rsize; 495f48ad614SDennis Dalessandro mdata->maxcnt = packet->maxcnt; 496f48ad614SDennis Dalessandro mdata->ps_head = packet->rhqoff; 497f48ad614SDennis Dalessandro 498f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 499f48ad614SDennis Dalessandro mdata->ps_tail = get_rcvhdrtail(rcd); 500f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) 501f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 502f48ad614SDennis Dalessandro else 503f48ad614SDennis Dalessandro mdata->ps_seq = 0; /* not used with DMA_RTAIL */ 504f48ad614SDennis Dalessandro } else { 505f48ad614SDennis Dalessandro mdata->ps_tail = 0; /* used only with DMA_RTAIL*/ 506f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 507f48ad614SDennis Dalessandro } 508f48ad614SDennis Dalessandro } 509f48ad614SDennis Dalessandro 510f48ad614SDennis Dalessandro static inline int ps_done(struct ps_mdata *mdata, u64 rhf, 511f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 512f48ad614SDennis Dalessandro { 513f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) 514f48ad614SDennis Dalessandro return mdata->ps_head == mdata->ps_tail; 515f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 516f48ad614SDennis Dalessandro } 517f48ad614SDennis Dalessandro 518f48ad614SDennis Dalessandro static inline int ps_skip(struct ps_mdata *mdata, u64 rhf, 519f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 520f48ad614SDennis Dalessandro { 521f48ad614SDennis Dalessandro /* 522f48ad614SDennis Dalessandro * Control context can potentially receive an invalid rhf. 523f48ad614SDennis Dalessandro * Drop such packets. 524f48ad614SDennis Dalessandro */ 525f48ad614SDennis Dalessandro if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail)) 526f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 527f48ad614SDennis Dalessandro 528f48ad614SDennis Dalessandro return 0; 529f48ad614SDennis Dalessandro } 530f48ad614SDennis Dalessandro 531f48ad614SDennis Dalessandro static inline void update_ps_mdata(struct ps_mdata *mdata, 532f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 533f48ad614SDennis Dalessandro { 534f48ad614SDennis Dalessandro mdata->ps_head += mdata->rsize; 535f48ad614SDennis Dalessandro if (mdata->ps_head >= mdata->maxcnt) 536f48ad614SDennis Dalessandro mdata->ps_head = 0; 537f48ad614SDennis Dalessandro 538f48ad614SDennis Dalessandro /* Control context must do seq counting */ 539f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) || 540f48ad614SDennis Dalessandro (rcd->ctxt == HFI1_CTRL_CTXT)) { 541f48ad614SDennis Dalessandro if (++mdata->ps_seq > 13) 542f48ad614SDennis Dalessandro mdata->ps_seq = 1; 543f48ad614SDennis Dalessandro } 544f48ad614SDennis Dalessandro } 545f48ad614SDennis Dalessandro 546f48ad614SDennis Dalessandro /* 547f48ad614SDennis Dalessandro * prescan_rxq - search through the receive queue looking for packets 548f48ad614SDennis Dalessandro * containing Excplicit Congestion Notifications (FECNs, or BECNs). 549f48ad614SDennis Dalessandro * When an ECN is found, process the Congestion Notification, and toggle 550f48ad614SDennis Dalessandro * it off. 551f48ad614SDennis Dalessandro * This is declared as a macro to allow quick checking of the port to avoid 552f48ad614SDennis Dalessandro * the overhead of a function call if not enabled. 553f48ad614SDennis Dalessandro */ 554f48ad614SDennis Dalessandro #define prescan_rxq(rcd, packet) \ 555f48ad614SDennis Dalessandro do { \ 556f48ad614SDennis Dalessandro if (rcd->ppd->cc_prescan) \ 557f48ad614SDennis Dalessandro __prescan_rxq(packet); \ 558f48ad614SDennis Dalessandro } while (0) 559f48ad614SDennis Dalessandro static void __prescan_rxq(struct hfi1_packet *packet) 560f48ad614SDennis Dalessandro { 561f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 562f48ad614SDennis Dalessandro struct ps_mdata mdata; 563f48ad614SDennis Dalessandro 564f48ad614SDennis Dalessandro init_ps_mdata(&mdata, packet); 565f48ad614SDennis Dalessandro 566f48ad614SDennis Dalessandro while (1) { 567f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 568f3e862cbSSebastian Sanchez struct hfi1_ibport *ibp = rcd_to_iport(rcd); 569f48ad614SDennis Dalessandro __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head + 570f48ad614SDennis Dalessandro dd->rhf_offset; 571f48ad614SDennis Dalessandro struct rvt_qp *qp; 572261a4351SMike Marciniszyn struct ib_header *hdr; 573f48ad614SDennis Dalessandro struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 574f48ad614SDennis Dalessandro u64 rhf = rhf_to_cpu(rhf_addr); 575f48ad614SDennis Dalessandro u32 etype = rhf_rcv_type(rhf), qpn, bth1; 576f48ad614SDennis Dalessandro int is_ecn = 0; 577f48ad614SDennis Dalessandro u8 lnh; 578f48ad614SDennis Dalessandro 579f48ad614SDennis Dalessandro if (ps_done(&mdata, rhf, rcd)) 580f48ad614SDennis Dalessandro break; 581f48ad614SDennis Dalessandro 582f48ad614SDennis Dalessandro if (ps_skip(&mdata, rhf, rcd)) 583f48ad614SDennis Dalessandro goto next; 584f48ad614SDennis Dalessandro 585f48ad614SDennis Dalessandro if (etype != RHF_RCV_TYPE_IB) 586f48ad614SDennis Dalessandro goto next; 587f48ad614SDennis Dalessandro 588f2d8a0b3SDasaratharaman Chandramouli packet->hdr = hfi1_get_msgheader(dd, rhf_addr); 589f2d8a0b3SDasaratharaman Chandramouli hdr = packet->hdr; 590cb427057SDon Hiatt lnh = ib_get_lnh(hdr); 591f48ad614SDennis Dalessandro 592f2d8a0b3SDasaratharaman Chandramouli if (lnh == HFI1_LRH_BTH) { 593f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.oth; 594f2d8a0b3SDasaratharaman Chandramouli } else if (lnh == HFI1_LRH_GRH) { 595f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.l.oth; 596f2d8a0b3SDasaratharaman Chandramouli packet->rcv_flags |= HFI1_HAS_GRH; 597f2d8a0b3SDasaratharaman Chandramouli } else { 598f48ad614SDennis Dalessandro goto next; /* just in case */ 599f2d8a0b3SDasaratharaman Chandramouli } 6005fd2b562SMitko Haralanov 601f2d8a0b3SDasaratharaman Chandramouli bth1 = be32_to_cpu(packet->ohdr->bth[1]); 6023d591099SDon Hiatt is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK)); 603f48ad614SDennis Dalessandro 604f48ad614SDennis Dalessandro if (!is_ecn) 605f48ad614SDennis Dalessandro goto next; 606f48ad614SDennis Dalessandro 607f48ad614SDennis Dalessandro qpn = bth1 & RVT_QPN_MASK; 608f48ad614SDennis Dalessandro rcu_read_lock(); 609f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn); 610f48ad614SDennis Dalessandro 611f48ad614SDennis Dalessandro if (!qp) { 612f48ad614SDennis Dalessandro rcu_read_unlock(); 613f48ad614SDennis Dalessandro goto next; 614f48ad614SDennis Dalessandro } 615f48ad614SDennis Dalessandro 6165fd2b562SMitko Haralanov process_ecn(qp, packet, true); 617f48ad614SDennis Dalessandro rcu_read_unlock(); 618f48ad614SDennis Dalessandro 619f48ad614SDennis Dalessandro /* turn off BECN, FECN */ 6203d591099SDon Hiatt bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK); 621f2d8a0b3SDasaratharaman Chandramouli packet->ohdr->bth[1] = cpu_to_be32(bth1); 622f48ad614SDennis Dalessandro next: 623f48ad614SDennis Dalessandro update_ps_mdata(&mdata, rcd); 624f48ad614SDennis Dalessandro } 625f48ad614SDennis Dalessandro } 626f48ad614SDennis Dalessandro 627a82a7fcdSMike Marciniszyn static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd) 628a82a7fcdSMike Marciniszyn { 629a82a7fcdSMike Marciniszyn struct rvt_qp *qp, *nqp; 630a82a7fcdSMike Marciniszyn 631a82a7fcdSMike Marciniszyn /* 632a82a7fcdSMike Marciniszyn * Iterate over all QPs waiting to respond. 633a82a7fcdSMike Marciniszyn * The list won't change since the IRQ is only run on one CPU. 634a82a7fcdSMike Marciniszyn */ 635a82a7fcdSMike Marciniszyn list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) { 636a82a7fcdSMike Marciniszyn list_del_init(&qp->rspwait); 637a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_NAK) { 638a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_NAK; 639a82a7fcdSMike Marciniszyn hfi1_send_rc_ack(rcd, qp, 0); 640a82a7fcdSMike Marciniszyn } 641a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_SEND) { 642a82a7fcdSMike Marciniszyn unsigned long flags; 643a82a7fcdSMike Marciniszyn 644a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_SEND; 645a82a7fcdSMike Marciniszyn spin_lock_irqsave(&qp->s_lock, flags); 646a82a7fcdSMike Marciniszyn if (ib_rvt_state_ops[qp->state] & 647a82a7fcdSMike Marciniszyn RVT_PROCESS_OR_FLUSH_SEND) 648a82a7fcdSMike Marciniszyn hfi1_schedule_send(qp); 649a82a7fcdSMike Marciniszyn spin_unlock_irqrestore(&qp->s_lock, flags); 650a82a7fcdSMike Marciniszyn } 651a82a7fcdSMike Marciniszyn rvt_put_qp(qp); 652a82a7fcdSMike Marciniszyn } 653a82a7fcdSMike Marciniszyn } 654a82a7fcdSMike Marciniszyn 655a82a7fcdSMike Marciniszyn static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread) 656a82a7fcdSMike Marciniszyn { 657a82a7fcdSMike Marciniszyn if (thread) { 658a82a7fcdSMike Marciniszyn if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0) 659a82a7fcdSMike Marciniszyn /* allow defered processing */ 660a82a7fcdSMike Marciniszyn process_rcv_qp_work(packet->rcd); 661a82a7fcdSMike Marciniszyn cond_resched(); 662a82a7fcdSMike Marciniszyn return RCV_PKT_OK; 663a82a7fcdSMike Marciniszyn } else { 664a82a7fcdSMike Marciniszyn this_cpu_inc(*packet->rcd->dd->rcv_limit); 665a82a7fcdSMike Marciniszyn return RCV_PKT_LIMIT; 666a82a7fcdSMike Marciniszyn } 667a82a7fcdSMike Marciniszyn } 668a82a7fcdSMike Marciniszyn 669a82a7fcdSMike Marciniszyn static inline int check_max_packet(struct hfi1_packet *packet, int thread) 670f48ad614SDennis Dalessandro { 671f48ad614SDennis Dalessandro int ret = RCV_PKT_OK; 672f48ad614SDennis Dalessandro 673a82a7fcdSMike Marciniszyn if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0)) 674a82a7fcdSMike Marciniszyn ret = max_packet_exceeded(packet, thread); 675a82a7fcdSMike Marciniszyn return ret; 676a82a7fcdSMike Marciniszyn } 677a82a7fcdSMike Marciniszyn 678a82a7fcdSMike Marciniszyn static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread) 679a82a7fcdSMike Marciniszyn { 680a82a7fcdSMike Marciniszyn int ret; 681a82a7fcdSMike Marciniszyn 682f48ad614SDennis Dalessandro /* Set up for the next packet */ 683f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 684f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 685f48ad614SDennis Dalessandro packet->rhqoff = 0; 686f48ad614SDennis Dalessandro 687f48ad614SDennis Dalessandro packet->numpkt++; 688a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 689f48ad614SDennis Dalessandro 690f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 691f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 692f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 693f48ad614SDennis Dalessandro 694f48ad614SDennis Dalessandro return ret; 695f48ad614SDennis Dalessandro } 696f48ad614SDennis Dalessandro 697f48ad614SDennis Dalessandro static inline int process_rcv_packet(struct hfi1_packet *packet, int thread) 698f48ad614SDennis Dalessandro { 699a82a7fcdSMike Marciniszyn int ret; 700f48ad614SDennis Dalessandro 701f48ad614SDennis Dalessandro packet->hdr = hfi1_get_msgheader(packet->rcd->dd, 702f48ad614SDennis Dalessandro packet->rhf_addr); 703f48ad614SDennis Dalessandro packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; 704f48ad614SDennis Dalessandro packet->etype = rhf_rcv_type(packet->rhf); 705f48ad614SDennis Dalessandro /* total length */ 706f48ad614SDennis Dalessandro packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */ 707f48ad614SDennis Dalessandro /* retrieve eager buffer details */ 708f48ad614SDennis Dalessandro packet->ebuf = NULL; 709f48ad614SDennis Dalessandro if (rhf_use_egr_bfr(packet->rhf)) { 710f48ad614SDennis Dalessandro packet->etail = rhf_egr_index(packet->rhf); 711f48ad614SDennis Dalessandro packet->ebuf = get_egrbuf(packet->rcd, packet->rhf, 712f48ad614SDennis Dalessandro &packet->updegr); 713f48ad614SDennis Dalessandro /* 714f48ad614SDennis Dalessandro * Prefetch the contents of the eager buffer. It is 715f48ad614SDennis Dalessandro * OK to send a negative length to prefetch_range(). 716f48ad614SDennis Dalessandro * The +2 is the size of the RHF. 717f48ad614SDennis Dalessandro */ 718f48ad614SDennis Dalessandro prefetch_range(packet->ebuf, 719f48ad614SDennis Dalessandro packet->tlen - ((packet->rcd->rcvhdrqentsize - 720f48ad614SDennis Dalessandro (rhf_hdrq_offset(packet->rhf) 721f48ad614SDennis Dalessandro + 2)) * 4)); 722f48ad614SDennis Dalessandro } 723f48ad614SDennis Dalessandro 724f48ad614SDennis Dalessandro /* 725f48ad614SDennis Dalessandro * Call a type specific handler for the packet. We 726f48ad614SDennis Dalessandro * should be able to trust that etype won't be beyond 727f48ad614SDennis Dalessandro * the range of valid indexes. If so something is really 728f48ad614SDennis Dalessandro * wrong and we can probably just let things come 729f48ad614SDennis Dalessandro * crashing down. There is no need to eat another 730f48ad614SDennis Dalessandro * comparison in this performance critical code. 731f48ad614SDennis Dalessandro */ 732f48ad614SDennis Dalessandro packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet); 733f48ad614SDennis Dalessandro packet->numpkt++; 734f48ad614SDennis Dalessandro 735f48ad614SDennis Dalessandro /* Set up for the next packet */ 736f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 737f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 738f48ad614SDennis Dalessandro packet->rhqoff = 0; 739f48ad614SDennis Dalessandro 740a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 741f48ad614SDennis Dalessandro 742f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 743f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 744f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 745f48ad614SDennis Dalessandro 746f48ad614SDennis Dalessandro return ret; 747f48ad614SDennis Dalessandro } 748f48ad614SDennis Dalessandro 749f48ad614SDennis Dalessandro static inline void process_rcv_update(int last, struct hfi1_packet *packet) 750f48ad614SDennis Dalessandro { 751f48ad614SDennis Dalessandro /* 752f48ad614SDennis Dalessandro * Update head regs etc., every 16 packets, if not last pkt, 753f48ad614SDennis Dalessandro * to help prevent rcvhdrq overflows, when many packets 754f48ad614SDennis Dalessandro * are processed and queue is nearly full. 755f48ad614SDennis Dalessandro * Don't request an interrupt for intermediate updates. 756f48ad614SDennis Dalessandro */ 757f48ad614SDennis Dalessandro if (!last && !(packet->numpkt & 0xf)) { 758f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rhqoff, packet->updegr, 759f48ad614SDennis Dalessandro packet->etail, 0, 0); 760f48ad614SDennis Dalessandro packet->updegr = 0; 761f48ad614SDennis Dalessandro } 762f48ad614SDennis Dalessandro packet->rcv_flags = 0; 763f48ad614SDennis Dalessandro } 764f48ad614SDennis Dalessandro 765f48ad614SDennis Dalessandro static inline void finish_packet(struct hfi1_packet *packet) 766f48ad614SDennis Dalessandro { 767f48ad614SDennis Dalessandro /* 768f48ad614SDennis Dalessandro * Nothing we need to free for the packet. 769f48ad614SDennis Dalessandro * 770f48ad614SDennis Dalessandro * The only thing we need to do is a final update and call for an 771f48ad614SDennis Dalessandro * interrupt 772f48ad614SDennis Dalessandro */ 773f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rcd->head, packet->updegr, 774f48ad614SDennis Dalessandro packet->etail, rcv_intr_dynamic, packet->numpkt); 775f48ad614SDennis Dalessandro } 776f48ad614SDennis Dalessandro 777f48ad614SDennis Dalessandro /* 778f48ad614SDennis Dalessandro * Handle receive interrupts when using the no dma rtail option. 779f48ad614SDennis Dalessandro */ 780f48ad614SDennis Dalessandro int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread) 781f48ad614SDennis Dalessandro { 782f48ad614SDennis Dalessandro u32 seq; 783f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 784f48ad614SDennis Dalessandro struct hfi1_packet packet; 785f48ad614SDennis Dalessandro 786f48ad614SDennis Dalessandro init_packet(rcd, &packet); 787f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 788f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) { 789f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 790f48ad614SDennis Dalessandro goto bail; 791f48ad614SDennis Dalessandro } 792f48ad614SDennis Dalessandro 793f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 794f48ad614SDennis Dalessandro 795f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 796f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 797f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 798f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 799f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 800f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 801f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 802f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 803f48ad614SDennis Dalessandro } 804a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 805a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 806f48ad614SDennis Dalessandro bail: 807f48ad614SDennis Dalessandro finish_packet(&packet); 808f48ad614SDennis Dalessandro return last; 809f48ad614SDennis Dalessandro } 810f48ad614SDennis Dalessandro 811f48ad614SDennis Dalessandro int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread) 812f48ad614SDennis Dalessandro { 813f48ad614SDennis Dalessandro u32 hdrqtail; 814f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 815f48ad614SDennis Dalessandro struct hfi1_packet packet; 816f48ad614SDennis Dalessandro 817f48ad614SDennis Dalessandro init_packet(rcd, &packet); 818f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 819f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 820f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 821f48ad614SDennis Dalessandro goto bail; 822f48ad614SDennis Dalessandro } 823f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 824f48ad614SDennis Dalessandro 825f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 826f48ad614SDennis Dalessandro 827f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 828f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 829f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 830f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 831f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 832f48ad614SDennis Dalessandro } 833a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 834a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 835f48ad614SDennis Dalessandro bail: 836f48ad614SDennis Dalessandro finish_packet(&packet); 837f48ad614SDennis Dalessandro return last; 838f48ad614SDennis Dalessandro } 839f48ad614SDennis Dalessandro 8402280740fSVishwanathapura, Niranjana static inline void set_nodma_rtail(struct hfi1_devdata *dd, u8 ctxt) 841f48ad614SDennis Dalessandro { 842f48ad614SDennis Dalessandro int i; 843f48ad614SDennis Dalessandro 8442280740fSVishwanathapura, Niranjana /* 8452280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 8462280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 8472280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 8482280740fSVishwanathapura, Niranjana */ 8492280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 8502280740fSVishwanathapura, Niranjana dd->rcd[ctxt]->do_interrupt = 8512280740fSVishwanathapura, Niranjana &handle_receive_interrupt_nodma_rtail; 8522280740fSVishwanathapura, Niranjana return; 8532280740fSVishwanathapura, Niranjana } 8542280740fSVishwanathapura, Niranjana 8552280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) 856f48ad614SDennis Dalessandro dd->rcd[i]->do_interrupt = 857f48ad614SDennis Dalessandro &handle_receive_interrupt_nodma_rtail; 858f48ad614SDennis Dalessandro } 859f48ad614SDennis Dalessandro 8602280740fSVishwanathapura, Niranjana static inline void set_dma_rtail(struct hfi1_devdata *dd, u8 ctxt) 861f48ad614SDennis Dalessandro { 862f48ad614SDennis Dalessandro int i; 863f48ad614SDennis Dalessandro 8642280740fSVishwanathapura, Niranjana /* 8652280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 8662280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 8672280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 8682280740fSVishwanathapura, Niranjana */ 8692280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 8702280740fSVishwanathapura, Niranjana dd->rcd[ctxt]->do_interrupt = 8712280740fSVishwanathapura, Niranjana &handle_receive_interrupt_dma_rtail; 8722280740fSVishwanathapura, Niranjana return; 8732280740fSVishwanathapura, Niranjana } 8742280740fSVishwanathapura, Niranjana 8752280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) 876f48ad614SDennis Dalessandro dd->rcd[i]->do_interrupt = 877f48ad614SDennis Dalessandro &handle_receive_interrupt_dma_rtail; 878f48ad614SDennis Dalessandro } 879f48ad614SDennis Dalessandro 880f48ad614SDennis Dalessandro void set_all_slowpath(struct hfi1_devdata *dd) 881f48ad614SDennis Dalessandro { 882f48ad614SDennis Dalessandro int i; 883f48ad614SDennis Dalessandro 884f48ad614SDennis Dalessandro /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */ 8852280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) { 8862280740fSVishwanathapura, Niranjana struct hfi1_ctxtdata *rcd = dd->rcd[i]; 8872280740fSVishwanathapura, Niranjana 8882280740fSVishwanathapura, Niranjana if ((i < dd->first_dyn_alloc_ctxt) || 8892280740fSVishwanathapura, Niranjana (rcd && rcd->sc && (rcd->sc->type == SC_KERNEL))) 8902280740fSVishwanathapura, Niranjana rcd->do_interrupt = &handle_receive_interrupt; 8912280740fSVishwanathapura, Niranjana } 892f48ad614SDennis Dalessandro } 893f48ad614SDennis Dalessandro 894f48ad614SDennis Dalessandro static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd, 895c867caafSMike Marciniszyn struct hfi1_packet *packet, 896f48ad614SDennis Dalessandro struct hfi1_devdata *dd) 897f48ad614SDennis Dalessandro { 898f48ad614SDennis Dalessandro struct work_struct *lsaw = &rcd->ppd->linkstate_active_work; 899261a4351SMike Marciniszyn struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd, 900c867caafSMike Marciniszyn packet->rhf_addr); 90169b9f4a4SMike Marciniszyn u8 etype = rhf_rcv_type(packet->rhf); 902f48ad614SDennis Dalessandro 903aad559c2SDasaratharaman Chandramouli if (etype == RHF_RCV_TYPE_IB && 904aad559c2SDasaratharaman Chandramouli hfi1_9B_get_sc5(hdr, packet->rhf) != 0xf) { 905f48ad614SDennis Dalessandro int hwstate = read_logical_state(dd); 906f48ad614SDennis Dalessandro 907f48ad614SDennis Dalessandro if (hwstate != LSTATE_ACTIVE) { 908f48ad614SDennis Dalessandro dd_dev_info(dd, "Unexpected link state %d\n", hwstate); 909f48ad614SDennis Dalessandro return 0; 910f48ad614SDennis Dalessandro } 911f48ad614SDennis Dalessandro 912f48ad614SDennis Dalessandro queue_work(rcd->ppd->hfi1_wq, lsaw); 913f48ad614SDennis Dalessandro return 1; 914f48ad614SDennis Dalessandro } 915f48ad614SDennis Dalessandro return 0; 916f48ad614SDennis Dalessandro } 917f48ad614SDennis Dalessandro 918f48ad614SDennis Dalessandro /* 919f48ad614SDennis Dalessandro * handle_receive_interrupt - receive a packet 920f48ad614SDennis Dalessandro * @rcd: the context 921f48ad614SDennis Dalessandro * 922f48ad614SDennis Dalessandro * Called from interrupt handler for errors or receive interrupt. 923f48ad614SDennis Dalessandro * This is the slow path interrupt handler. 924f48ad614SDennis Dalessandro */ 925f48ad614SDennis Dalessandro int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread) 926f48ad614SDennis Dalessandro { 927f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 928f48ad614SDennis Dalessandro u32 hdrqtail; 929f48ad614SDennis Dalessandro int needset, last = RCV_PKT_OK; 930f48ad614SDennis Dalessandro struct hfi1_packet packet; 931f48ad614SDennis Dalessandro int skip_pkt = 0; 932f48ad614SDennis Dalessandro 933f48ad614SDennis Dalessandro /* Control context will always use the slow path interrupt handler */ 934f48ad614SDennis Dalessandro needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1; 935f48ad614SDennis Dalessandro 936f48ad614SDennis Dalessandro init_packet(rcd, &packet); 937f48ad614SDennis Dalessandro 938f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 939f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 940f48ad614SDennis Dalessandro 941f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) { 942f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 943f48ad614SDennis Dalessandro goto bail; 944f48ad614SDennis Dalessandro } 945f48ad614SDennis Dalessandro hdrqtail = 0; 946f48ad614SDennis Dalessandro } else { 947f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 948f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 949f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 950f48ad614SDennis Dalessandro goto bail; 951f48ad614SDennis Dalessandro } 952f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 953f48ad614SDennis Dalessandro 954f48ad614SDennis Dalessandro /* 955f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 956f48ad614SDennis Dalessandro * rhf. Drop such packets. 957f48ad614SDennis Dalessandro */ 958f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 959f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 960f48ad614SDennis Dalessandro 961f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 962f48ad614SDennis Dalessandro skip_pkt = 1; 963f48ad614SDennis Dalessandro } 964f48ad614SDennis Dalessandro } 965f48ad614SDennis Dalessandro 966f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 967f48ad614SDennis Dalessandro 968f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 969f48ad614SDennis Dalessandro if (unlikely(dd->do_drop && 970f48ad614SDennis Dalessandro atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) == 971f48ad614SDennis Dalessandro DROP_PACKET_ON)) { 972f48ad614SDennis Dalessandro dd->do_drop = 0; 973f48ad614SDennis Dalessandro 974f48ad614SDennis Dalessandro /* On to the next packet */ 975f48ad614SDennis Dalessandro packet.rhqoff += packet.rsize; 976f48ad614SDennis Dalessandro packet.rhf_addr = (__le32 *)rcd->rcvhdrq + 977f48ad614SDennis Dalessandro packet.rhqoff + 978f48ad614SDennis Dalessandro dd->rhf_offset; 979f48ad614SDennis Dalessandro packet.rhf = rhf_to_cpu(packet.rhf_addr); 980f48ad614SDennis Dalessandro 981f48ad614SDennis Dalessandro } else if (skip_pkt) { 982f48ad614SDennis Dalessandro last = skip_rcv_packet(&packet, thread); 983f48ad614SDennis Dalessandro skip_pkt = 0; 984f48ad614SDennis Dalessandro } else { 985f48ad614SDennis Dalessandro /* Auto activate link on non-SC15 packet receive */ 986f48ad614SDennis Dalessandro if (unlikely(rcd->ppd->host_link_state == 987f48ad614SDennis Dalessandro HLS_UP_ARMED) && 988c867caafSMike Marciniszyn set_armed_to_active(rcd, &packet, dd)) 989f48ad614SDennis Dalessandro goto bail; 990f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 991f48ad614SDennis Dalessandro } 992f48ad614SDennis Dalessandro 993f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 994f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 995f48ad614SDennis Dalessandro 996f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 997f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 998f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 999f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1000f48ad614SDennis Dalessandro if (needset) { 1001f48ad614SDennis Dalessandro dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n"); 10022280740fSVishwanathapura, Niranjana set_nodma_rtail(dd, rcd->ctxt); 1003f48ad614SDennis Dalessandro needset = 0; 1004f48ad614SDennis Dalessandro } 1005f48ad614SDennis Dalessandro } else { 1006f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 1007f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1008f48ad614SDennis Dalessandro /* 1009f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 1010f48ad614SDennis Dalessandro * rhf. Drop such packets. 1011f48ad614SDennis Dalessandro */ 1012f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 1013f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1014f48ad614SDennis Dalessandro 1015f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 1016f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 1017f48ad614SDennis Dalessandro if (!last && (seq != rcd->seq_cnt)) 1018f48ad614SDennis Dalessandro skip_pkt = 1; 1019f48ad614SDennis Dalessandro } 1020f48ad614SDennis Dalessandro 1021f48ad614SDennis Dalessandro if (needset) { 1022f48ad614SDennis Dalessandro dd_dev_info(dd, 1023f48ad614SDennis Dalessandro "Switching to DMA_RTAIL\n"); 10242280740fSVishwanathapura, Niranjana set_dma_rtail(dd, rcd->ctxt); 1025f48ad614SDennis Dalessandro needset = 0; 1026f48ad614SDennis Dalessandro } 1027f48ad614SDennis Dalessandro } 1028f48ad614SDennis Dalessandro 1029f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 1030f48ad614SDennis Dalessandro } 1031f48ad614SDennis Dalessandro 1032a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 1033a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 1034f48ad614SDennis Dalessandro 1035f48ad614SDennis Dalessandro bail: 1036f48ad614SDennis Dalessandro /* 1037f48ad614SDennis Dalessandro * Always write head at end, and setup rcv interrupt, even 1038f48ad614SDennis Dalessandro * if no packets were processed. 1039f48ad614SDennis Dalessandro */ 1040f48ad614SDennis Dalessandro finish_packet(&packet); 1041f48ad614SDennis Dalessandro return last; 1042f48ad614SDennis Dalessandro } 1043f48ad614SDennis Dalessandro 1044f48ad614SDennis Dalessandro /* 1045f48ad614SDennis Dalessandro * We may discover in the interrupt that the hardware link state has 1046f48ad614SDennis Dalessandro * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet), 1047f48ad614SDennis Dalessandro * and we need to update the driver's notion of the link state. We cannot 1048f48ad614SDennis Dalessandro * run set_link_state from interrupt context, so we queue this function on 1049f48ad614SDennis Dalessandro * a workqueue. 1050f48ad614SDennis Dalessandro * 1051f48ad614SDennis Dalessandro * We delay the regular interrupt processing until after the state changes 1052f48ad614SDennis Dalessandro * so that the link will be in the correct state by the time any application 1053f48ad614SDennis Dalessandro * we wake up attempts to send a reply to any message it received. 1054f48ad614SDennis Dalessandro * (Subsequent receive interrupts may possibly force the wakeup before we 1055f48ad614SDennis Dalessandro * update the link state.) 1056f48ad614SDennis Dalessandro * 1057f48ad614SDennis Dalessandro * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes 1058f48ad614SDennis Dalessandro * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues, 1059f48ad614SDennis Dalessandro * so we're safe from use-after-free of the rcd. 1060f48ad614SDennis Dalessandro */ 1061f48ad614SDennis Dalessandro void receive_interrupt_work(struct work_struct *work) 1062f48ad614SDennis Dalessandro { 1063f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata, 1064f48ad614SDennis Dalessandro linkstate_active_work); 1065f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1066f48ad614SDennis Dalessandro int i; 1067f48ad614SDennis Dalessandro 1068f48ad614SDennis Dalessandro /* Received non-SC15 packet implies neighbor_normal */ 1069f48ad614SDennis Dalessandro ppd->neighbor_normal = 1; 1070f48ad614SDennis Dalessandro set_link_state(ppd, HLS_UP_ACTIVE); 1071f48ad614SDennis Dalessandro 1072f48ad614SDennis Dalessandro /* 10732280740fSVishwanathapura, Niranjana * Interrupt all statically allocated kernel contexts that could 10742280740fSVishwanathapura, Niranjana * have had an interrupt during auto activation. 1075f48ad614SDennis Dalessandro */ 10762280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) 1077f48ad614SDennis Dalessandro force_recv_intr(dd->rcd[i]); 1078f48ad614SDennis Dalessandro } 1079f48ad614SDennis Dalessandro 1080f48ad614SDennis Dalessandro /* 1081f48ad614SDennis Dalessandro * Convert a given MTU size to the on-wire MAD packet enumeration. 1082f48ad614SDennis Dalessandro * Return -1 if the size is invalid. 1083f48ad614SDennis Dalessandro */ 1084f48ad614SDennis Dalessandro int mtu_to_enum(u32 mtu, int default_if_bad) 1085f48ad614SDennis Dalessandro { 1086f48ad614SDennis Dalessandro switch (mtu) { 1087f48ad614SDennis Dalessandro case 0: return OPA_MTU_0; 1088f48ad614SDennis Dalessandro case 256: return OPA_MTU_256; 1089f48ad614SDennis Dalessandro case 512: return OPA_MTU_512; 1090f48ad614SDennis Dalessandro case 1024: return OPA_MTU_1024; 1091f48ad614SDennis Dalessandro case 2048: return OPA_MTU_2048; 1092f48ad614SDennis Dalessandro case 4096: return OPA_MTU_4096; 1093f48ad614SDennis Dalessandro case 8192: return OPA_MTU_8192; 1094f48ad614SDennis Dalessandro case 10240: return OPA_MTU_10240; 1095f48ad614SDennis Dalessandro } 1096f48ad614SDennis Dalessandro return default_if_bad; 1097f48ad614SDennis Dalessandro } 1098f48ad614SDennis Dalessandro 1099f48ad614SDennis Dalessandro u16 enum_to_mtu(int mtu) 1100f48ad614SDennis Dalessandro { 1101f48ad614SDennis Dalessandro switch (mtu) { 1102f48ad614SDennis Dalessandro case OPA_MTU_0: return 0; 1103f48ad614SDennis Dalessandro case OPA_MTU_256: return 256; 1104f48ad614SDennis Dalessandro case OPA_MTU_512: return 512; 1105f48ad614SDennis Dalessandro case OPA_MTU_1024: return 1024; 1106f48ad614SDennis Dalessandro case OPA_MTU_2048: return 2048; 1107f48ad614SDennis Dalessandro case OPA_MTU_4096: return 4096; 1108f48ad614SDennis Dalessandro case OPA_MTU_8192: return 8192; 1109f48ad614SDennis Dalessandro case OPA_MTU_10240: return 10240; 1110f48ad614SDennis Dalessandro default: return 0xffff; 1111f48ad614SDennis Dalessandro } 1112f48ad614SDennis Dalessandro } 1113f48ad614SDennis Dalessandro 1114f48ad614SDennis Dalessandro /* 1115f48ad614SDennis Dalessandro * set_mtu - set the MTU 1116f48ad614SDennis Dalessandro * @ppd: the per port data 1117f48ad614SDennis Dalessandro * 1118f48ad614SDennis Dalessandro * We can handle "any" incoming size, the issue here is whether we 1119f48ad614SDennis Dalessandro * need to restrict our outgoing size. We do not deal with what happens 1120f48ad614SDennis Dalessandro * to programs that are already running when the size changes. 1121f48ad614SDennis Dalessandro */ 1122f48ad614SDennis Dalessandro int set_mtu(struct hfi1_pportdata *ppd) 1123f48ad614SDennis Dalessandro { 1124f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1125f48ad614SDennis Dalessandro int i, drain, ret = 0, is_up = 0; 1126f48ad614SDennis Dalessandro 1127f48ad614SDennis Dalessandro ppd->ibmtu = 0; 1128f48ad614SDennis Dalessandro for (i = 0; i < ppd->vls_supported; i++) 1129f48ad614SDennis Dalessandro if (ppd->ibmtu < dd->vld[i].mtu) 1130f48ad614SDennis Dalessandro ppd->ibmtu = dd->vld[i].mtu; 1131f48ad614SDennis Dalessandro ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd); 1132f48ad614SDennis Dalessandro 1133f48ad614SDennis Dalessandro mutex_lock(&ppd->hls_lock); 1134f48ad614SDennis Dalessandro if (ppd->host_link_state == HLS_UP_INIT || 1135f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ARMED || 1136f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ACTIVE) 1137f48ad614SDennis Dalessandro is_up = 1; 1138f48ad614SDennis Dalessandro 1139f48ad614SDennis Dalessandro drain = !is_ax(dd) && is_up; 1140f48ad614SDennis Dalessandro 1141f48ad614SDennis Dalessandro if (drain) 1142f48ad614SDennis Dalessandro /* 1143f48ad614SDennis Dalessandro * MTU is specified per-VL. To ensure that no packet gets 1144f48ad614SDennis Dalessandro * stuck (due, e.g., to the MTU for the packet's VL being 1145f48ad614SDennis Dalessandro * reduced), empty the per-VL FIFOs before adjusting MTU. 1146f48ad614SDennis Dalessandro */ 1147f48ad614SDennis Dalessandro ret = stop_drain_data_vls(dd); 1148f48ad614SDennis Dalessandro 1149f48ad614SDennis Dalessandro if (ret) { 1150f48ad614SDennis Dalessandro dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n", 1151f48ad614SDennis Dalessandro __func__); 1152f48ad614SDennis Dalessandro goto err; 1153f48ad614SDennis Dalessandro } 1154f48ad614SDennis Dalessandro 1155f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0); 1156f48ad614SDennis Dalessandro 1157f48ad614SDennis Dalessandro if (drain) 1158f48ad614SDennis Dalessandro open_fill_data_vls(dd); /* reopen all VLs */ 1159f48ad614SDennis Dalessandro 1160f48ad614SDennis Dalessandro err: 1161f48ad614SDennis Dalessandro mutex_unlock(&ppd->hls_lock); 1162f48ad614SDennis Dalessandro 1163f48ad614SDennis Dalessandro return ret; 1164f48ad614SDennis Dalessandro } 1165f48ad614SDennis Dalessandro 1166f48ad614SDennis Dalessandro int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc) 1167f48ad614SDennis Dalessandro { 1168f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1169f48ad614SDennis Dalessandro 1170f48ad614SDennis Dalessandro ppd->lid = lid; 1171f48ad614SDennis Dalessandro ppd->lmc = lmc; 1172f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0); 1173f48ad614SDennis Dalessandro 1174f48ad614SDennis Dalessandro dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid); 1175f48ad614SDennis Dalessandro 1176f48ad614SDennis Dalessandro return 0; 1177f48ad614SDennis Dalessandro } 1178f48ad614SDennis Dalessandro 1179f48ad614SDennis Dalessandro void shutdown_led_override(struct hfi1_pportdata *ppd) 1180f48ad614SDennis Dalessandro { 1181f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1182f48ad614SDennis Dalessandro 1183f48ad614SDennis Dalessandro /* 1184f48ad614SDennis Dalessandro * This pairs with the memory barrier in hfi1_start_led_override to 1185f48ad614SDennis Dalessandro * ensure that we read the correct state of LED beaconing represented 1186f48ad614SDennis Dalessandro * by led_override_timer_active 1187f48ad614SDennis Dalessandro */ 1188f48ad614SDennis Dalessandro smp_rmb(); 1189f48ad614SDennis Dalessandro if (atomic_read(&ppd->led_override_timer_active)) { 1190f48ad614SDennis Dalessandro del_timer_sync(&ppd->led_override_timer); 1191f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 0); 1192f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1193f48ad614SDennis Dalessandro smp_wmb(); 1194f48ad614SDennis Dalessandro } 1195f48ad614SDennis Dalessandro 1196f48ad614SDennis Dalessandro /* Hand control of the LED to the DC for normal operation */ 1197f48ad614SDennis Dalessandro write_csr(dd, DCC_CFG_LED_CNTRL, 0); 1198f48ad614SDennis Dalessandro } 1199f48ad614SDennis Dalessandro 1200f48ad614SDennis Dalessandro static void run_led_override(unsigned long opaque) 1201f48ad614SDennis Dalessandro { 1202f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque; 1203f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1204f48ad614SDennis Dalessandro unsigned long timeout; 1205f48ad614SDennis Dalessandro int phase_idx; 1206f48ad614SDennis Dalessandro 1207f48ad614SDennis Dalessandro if (!(dd->flags & HFI1_INITTED)) 1208f48ad614SDennis Dalessandro return; 1209f48ad614SDennis Dalessandro 1210f48ad614SDennis Dalessandro phase_idx = ppd->led_override_phase & 1; 1211f48ad614SDennis Dalessandro 1212f48ad614SDennis Dalessandro setextled(dd, phase_idx); 1213f48ad614SDennis Dalessandro 1214f48ad614SDennis Dalessandro timeout = ppd->led_override_vals[phase_idx]; 1215f48ad614SDennis Dalessandro 1216f48ad614SDennis Dalessandro /* Set up for next phase */ 1217f48ad614SDennis Dalessandro ppd->led_override_phase = !ppd->led_override_phase; 1218f48ad614SDennis Dalessandro 1219f48ad614SDennis Dalessandro mod_timer(&ppd->led_override_timer, jiffies + timeout); 1220f48ad614SDennis Dalessandro } 1221f48ad614SDennis Dalessandro 1222f48ad614SDennis Dalessandro /* 1223f48ad614SDennis Dalessandro * To have the LED blink in a particular pattern, provide timeon and timeoff 1224f48ad614SDennis Dalessandro * in milliseconds. 1225f48ad614SDennis Dalessandro * To turn off custom blinking and return to normal operation, use 1226f48ad614SDennis Dalessandro * shutdown_led_override() 1227f48ad614SDennis Dalessandro */ 1228f48ad614SDennis Dalessandro void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon, 1229f48ad614SDennis Dalessandro unsigned int timeoff) 1230f48ad614SDennis Dalessandro { 1231f48ad614SDennis Dalessandro if (!(ppd->dd->flags & HFI1_INITTED)) 1232f48ad614SDennis Dalessandro return; 1233f48ad614SDennis Dalessandro 1234f48ad614SDennis Dalessandro /* Convert to jiffies for direct use in timer */ 1235f48ad614SDennis Dalessandro ppd->led_override_vals[0] = msecs_to_jiffies(timeoff); 1236f48ad614SDennis Dalessandro ppd->led_override_vals[1] = msecs_to_jiffies(timeon); 1237f48ad614SDennis Dalessandro 1238f48ad614SDennis Dalessandro /* Arbitrarily start from LED on phase */ 1239f48ad614SDennis Dalessandro ppd->led_override_phase = 1; 1240f48ad614SDennis Dalessandro 1241f48ad614SDennis Dalessandro /* 1242f48ad614SDennis Dalessandro * If the timer has not already been started, do so. Use a "quick" 1243f48ad614SDennis Dalessandro * timeout so the handler will be called soon to look at our request. 1244f48ad614SDennis Dalessandro */ 1245f48ad614SDennis Dalessandro if (!timer_pending(&ppd->led_override_timer)) { 1246f48ad614SDennis Dalessandro setup_timer(&ppd->led_override_timer, run_led_override, 1247f48ad614SDennis Dalessandro (unsigned long)ppd); 1248f48ad614SDennis Dalessandro ppd->led_override_timer.expires = jiffies + 1; 1249f48ad614SDennis Dalessandro add_timer(&ppd->led_override_timer); 1250f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 1); 1251f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1252f48ad614SDennis Dalessandro smp_wmb(); 1253f48ad614SDennis Dalessandro } 1254f48ad614SDennis Dalessandro } 1255f48ad614SDennis Dalessandro 1256f48ad614SDennis Dalessandro /** 1257f48ad614SDennis Dalessandro * hfi1_reset_device - reset the chip if possible 1258f48ad614SDennis Dalessandro * @unit: the device to reset 1259f48ad614SDennis Dalessandro * 1260f48ad614SDennis Dalessandro * Whether or not reset is successful, we attempt to re-initialize the chip 1261f48ad614SDennis Dalessandro * (that is, much like a driver unload/reload). We clear the INITTED flag 1262f48ad614SDennis Dalessandro * so that the various entry points will fail until we reinitialize. For 1263f48ad614SDennis Dalessandro * now, we only allow this if no user contexts are open that use chip resources 1264f48ad614SDennis Dalessandro */ 1265f48ad614SDennis Dalessandro int hfi1_reset_device(int unit) 1266f48ad614SDennis Dalessandro { 1267f48ad614SDennis Dalessandro int ret, i; 1268f48ad614SDennis Dalessandro struct hfi1_devdata *dd = hfi1_lookup(unit); 1269f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 1270f48ad614SDennis Dalessandro unsigned long flags; 1271f48ad614SDennis Dalessandro int pidx; 1272f48ad614SDennis Dalessandro 1273f48ad614SDennis Dalessandro if (!dd) { 1274f48ad614SDennis Dalessandro ret = -ENODEV; 1275f48ad614SDennis Dalessandro goto bail; 1276f48ad614SDennis Dalessandro } 1277f48ad614SDennis Dalessandro 1278f48ad614SDennis Dalessandro dd_dev_info(dd, "Reset on unit %u requested\n", unit); 1279f48ad614SDennis Dalessandro 1280f48ad614SDennis Dalessandro if (!dd->kregbase || !(dd->flags & HFI1_PRESENT)) { 1281f48ad614SDennis Dalessandro dd_dev_info(dd, 1282f48ad614SDennis Dalessandro "Invalid unit number %u or not initialized or not present\n", 1283f48ad614SDennis Dalessandro unit); 1284f48ad614SDennis Dalessandro ret = -ENXIO; 1285f48ad614SDennis Dalessandro goto bail; 1286f48ad614SDennis Dalessandro } 1287f48ad614SDennis Dalessandro 1288f48ad614SDennis Dalessandro spin_lock_irqsave(&dd->uctxt_lock, flags); 1289f48ad614SDennis Dalessandro if (dd->rcd) 12902280740fSVishwanathapura, Niranjana for (i = dd->first_dyn_alloc_ctxt; 12912280740fSVishwanathapura, Niranjana i < dd->num_rcv_contexts; i++) { 12928737ce95SMichael J. Ruhl if (!dd->rcd[i]) 1293f48ad614SDennis Dalessandro continue; 1294f48ad614SDennis Dalessandro spin_unlock_irqrestore(&dd->uctxt_lock, flags); 1295f48ad614SDennis Dalessandro ret = -EBUSY; 1296f48ad614SDennis Dalessandro goto bail; 1297f48ad614SDennis Dalessandro } 1298f48ad614SDennis Dalessandro spin_unlock_irqrestore(&dd->uctxt_lock, flags); 1299f48ad614SDennis Dalessandro 1300f48ad614SDennis Dalessandro for (pidx = 0; pidx < dd->num_pports; ++pidx) { 1301f48ad614SDennis Dalessandro ppd = dd->pport + pidx; 1302f48ad614SDennis Dalessandro 1303f48ad614SDennis Dalessandro shutdown_led_override(ppd); 1304f48ad614SDennis Dalessandro } 1305f48ad614SDennis Dalessandro if (dd->flags & HFI1_HAS_SEND_DMA) 1306f48ad614SDennis Dalessandro sdma_exit(dd); 1307f48ad614SDennis Dalessandro 1308f48ad614SDennis Dalessandro hfi1_reset_cpu_counters(dd); 1309f48ad614SDennis Dalessandro 1310f48ad614SDennis Dalessandro ret = hfi1_init(dd, 1); 1311f48ad614SDennis Dalessandro 1312f48ad614SDennis Dalessandro if (ret) 1313f48ad614SDennis Dalessandro dd_dev_err(dd, 1314f48ad614SDennis Dalessandro "Reinitialize unit %u after reset failed with %d\n", 1315f48ad614SDennis Dalessandro unit, ret); 1316f48ad614SDennis Dalessandro else 1317f48ad614SDennis Dalessandro dd_dev_info(dd, "Reinitialized unit %u after resetting\n", 1318f48ad614SDennis Dalessandro unit); 1319f48ad614SDennis Dalessandro 1320f48ad614SDennis Dalessandro bail: 1321f48ad614SDennis Dalessandro return ret; 1322f48ad614SDennis Dalessandro } 1323f48ad614SDennis Dalessandro 1324f48ad614SDennis Dalessandro void handle_eflags(struct hfi1_packet *packet) 1325f48ad614SDennis Dalessandro { 1326f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 1327f48ad614SDennis Dalessandro u32 rte = rhf_rcv_type_err(packet->rhf); 1328f48ad614SDennis Dalessandro 1329f48ad614SDennis Dalessandro rcv_hdrerr(rcd, rcd->ppd, packet); 1330f48ad614SDennis Dalessandro if (rhf_err_flags(packet->rhf)) 1331f48ad614SDennis Dalessandro dd_dev_err(rcd->dd, 1332f48ad614SDennis Dalessandro "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n", 1333f48ad614SDennis Dalessandro rcd->ctxt, packet->rhf, 1334f48ad614SDennis Dalessandro packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "", 1335f48ad614SDennis Dalessandro packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "", 1336f48ad614SDennis Dalessandro packet->rhf & RHF_DC_ERR ? "dc " : "", 1337f48ad614SDennis Dalessandro packet->rhf & RHF_TID_ERR ? "tid " : "", 1338f48ad614SDennis Dalessandro packet->rhf & RHF_LEN_ERR ? "len " : "", 1339f48ad614SDennis Dalessandro packet->rhf & RHF_ECC_ERR ? "ecc " : "", 1340f48ad614SDennis Dalessandro packet->rhf & RHF_VCRC_ERR ? "vcrc " : "", 1341f48ad614SDennis Dalessandro packet->rhf & RHF_ICRC_ERR ? "icrc " : "", 1342f48ad614SDennis Dalessandro rte); 1343f48ad614SDennis Dalessandro } 1344f48ad614SDennis Dalessandro 1345f48ad614SDennis Dalessandro /* 1346f48ad614SDennis Dalessandro * The following functions are called by the interrupt handler. They are type 1347f48ad614SDennis Dalessandro * specific handlers for each packet type. 1348f48ad614SDennis Dalessandro */ 1349f48ad614SDennis Dalessandro int process_receive_ib(struct hfi1_packet *packet) 1350f48ad614SDennis Dalessandro { 13510181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 13520181ce31SDon Hiatt return RHF_RCV_CONTINUE; 13530181ce31SDon Hiatt 1354f48ad614SDennis Dalessandro trace_hfi1_rcvhdr(packet->rcd->ppd->dd, 1355f48ad614SDennis Dalessandro packet->rcd->ctxt, 1356f48ad614SDennis Dalessandro rhf_err_flags(packet->rhf), 1357f48ad614SDennis Dalessandro RHF_RCV_TYPE_IB, 1358f48ad614SDennis Dalessandro packet->hlen, 1359f48ad614SDennis Dalessandro packet->tlen, 1360f48ad614SDennis Dalessandro packet->updegr, 1361f48ad614SDennis Dalessandro rhf_egr_index(packet->rhf)); 1362f48ad614SDennis Dalessandro 1363243d9f43SDon Hiatt if (unlikely( 1364243d9f43SDon Hiatt (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1365243d9f43SDon Hiatt (packet->rhf & RHF_DC_ERR)))) 1366243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1367243d9f43SDon Hiatt 1368f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) { 1369f48ad614SDennis Dalessandro handle_eflags(packet); 1370f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1371f48ad614SDennis Dalessandro } 1372f48ad614SDennis Dalessandro 1373f48ad614SDennis Dalessandro hfi1_ib_rcv(packet); 1374f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1375f48ad614SDennis Dalessandro } 1376f48ad614SDennis Dalessandro 1377d4829ea6SVishwanathapura, Niranjana static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet) 1378d4829ea6SVishwanathapura, Niranjana { 1379d4829ea6SVishwanathapura, Niranjana /* Packet received in VNIC context via RSM */ 1380d4829ea6SVishwanathapura, Niranjana if (packet->rcd->is_vnic) 1381d4829ea6SVishwanathapura, Niranjana return true; 1382d4829ea6SVishwanathapura, Niranjana 1383d4829ea6SVishwanathapura, Niranjana if ((HFI1_GET_L2_TYPE(packet->ebuf) == OPA_VNIC_L2_TYPE) && 1384d4829ea6SVishwanathapura, Niranjana (HFI1_GET_L4_TYPE(packet->ebuf) == OPA_VNIC_L4_ETHR)) 1385d4829ea6SVishwanathapura, Niranjana return true; 1386d4829ea6SVishwanathapura, Niranjana 1387d4829ea6SVishwanathapura, Niranjana return false; 1388d4829ea6SVishwanathapura, Niranjana } 1389d4829ea6SVishwanathapura, Niranjana 1390f48ad614SDennis Dalessandro int process_receive_bypass(struct hfi1_packet *packet) 1391f48ad614SDennis Dalessandro { 1392505efe3eSJakub Pawlak struct hfi1_devdata *dd = packet->rcd->dd; 1393505efe3eSJakub Pawlak 1394d4829ea6SVishwanathapura, Niranjana if (unlikely(rhf_err_flags(packet->rhf))) { 1395f48ad614SDennis Dalessandro handle_eflags(packet); 1396d4829ea6SVishwanathapura, Niranjana } else if (hfi1_is_vnic_packet(packet)) { 1397d4829ea6SVishwanathapura, Niranjana hfi1_vnic_bypass_rcv(packet); 1398d4829ea6SVishwanathapura, Niranjana return RHF_RCV_CONTINUE; 1399d4829ea6SVishwanathapura, Niranjana } 1400f48ad614SDennis Dalessandro 1401d4829ea6SVishwanathapura, Niranjana dd_dev_err(dd, "Unsupported bypass packet. Dropping\n"); 1402505efe3eSJakub Pawlak incr_cntr64(&dd->sw_rcv_bypass_packet_errors); 1403505efe3eSJakub Pawlak if (!(dd->err_info_rcvport.status_and_code & OPA_EI_STATUS_SMASK)) { 1404505efe3eSJakub Pawlak u64 *flits = packet->ebuf; 1405505efe3eSJakub Pawlak 1406505efe3eSJakub Pawlak if (flits && !(packet->rhf & RHF_LEN_ERR)) { 1407505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit1 = flits[0]; 1408505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit2 = 1409505efe3eSJakub Pawlak packet->tlen > sizeof(flits[0]) ? flits[1] : 0; 1410505efe3eSJakub Pawlak } 1411505efe3eSJakub Pawlak dd->err_info_rcvport.status_and_code |= 1412505efe3eSJakub Pawlak (OPA_EI_STATUS_SMASK | BAD_L2_ERR); 1413505efe3eSJakub Pawlak } 1414f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1415f48ad614SDennis Dalessandro } 1416f48ad614SDennis Dalessandro 1417f48ad614SDennis Dalessandro int process_receive_error(struct hfi1_packet *packet) 1418f48ad614SDennis Dalessandro { 1419243d9f43SDon Hiatt /* KHdrHCRCErr -- KDETH packet with a bad HCRC */ 1420243d9f43SDon Hiatt if (unlikely( 1421243d9f43SDon Hiatt hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1422243d9f43SDon Hiatt rhf_rcv_type_err(packet->rhf) == 3)) 1423243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1424243d9f43SDon Hiatt 1425f48ad614SDennis Dalessandro handle_eflags(packet); 1426f48ad614SDennis Dalessandro 1427f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1428f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1429f48ad614SDennis Dalessandro "Unhandled error packet received. Dropping.\n"); 1430f48ad614SDennis Dalessandro 1431f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1432f48ad614SDennis Dalessandro } 1433f48ad614SDennis Dalessandro 1434f48ad614SDennis Dalessandro int kdeth_process_expected(struct hfi1_packet *packet) 1435f48ad614SDennis Dalessandro { 14360181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 14370181ce31SDon Hiatt return RHF_RCV_CONTINUE; 1438f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1439f48ad614SDennis Dalessandro handle_eflags(packet); 1440f48ad614SDennis Dalessandro 1441f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1442f48ad614SDennis Dalessandro "Unhandled expected packet received. Dropping.\n"); 1443f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1444f48ad614SDennis Dalessandro } 1445f48ad614SDennis Dalessandro 1446f48ad614SDennis Dalessandro int kdeth_process_eager(struct hfi1_packet *packet) 1447f48ad614SDennis Dalessandro { 1448f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1449f48ad614SDennis Dalessandro handle_eflags(packet); 14500181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 14510181ce31SDon Hiatt return RHF_RCV_CONTINUE; 1452f48ad614SDennis Dalessandro 1453f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1454f48ad614SDennis Dalessandro "Unhandled eager packet received. Dropping.\n"); 1455f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1456f48ad614SDennis Dalessandro } 1457f48ad614SDennis Dalessandro 1458f48ad614SDennis Dalessandro int process_receive_invalid(struct hfi1_packet *packet) 1459f48ad614SDennis Dalessandro { 1460f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n", 1461f48ad614SDennis Dalessandro rhf_rcv_type(packet->rhf)); 1462f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1463f48ad614SDennis Dalessandro } 1464