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 100f48ad614SDennis Dalessandro /* 101f48ad614SDennis Dalessandro * MAX_PKT_RCV is the max # if packets processed per receive interrupt. 102f48ad614SDennis Dalessandro */ 103f48ad614SDennis Dalessandro #define MAX_PKT_RECV 64 104a82a7fcdSMike Marciniszyn /* 105a82a7fcdSMike Marciniszyn * MAX_PKT_THREAD_RCV is the max # of packets processed before 106a82a7fcdSMike Marciniszyn * the qp_wait_list queue is flushed. 107a82a7fcdSMike Marciniszyn */ 108a82a7fcdSMike Marciniszyn #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4) 109f48ad614SDennis Dalessandro #define EGR_HEAD_UPDATE_THRESHOLD 16 110f48ad614SDennis Dalessandro 111f48ad614SDennis Dalessandro struct hfi1_ib_stats hfi1_stats; 112f48ad614SDennis Dalessandro 113f48ad614SDennis Dalessandro static int hfi1_caps_set(const char *val, const struct kernel_param *kp) 114f48ad614SDennis Dalessandro { 115f48ad614SDennis Dalessandro int ret = 0; 116f48ad614SDennis Dalessandro unsigned long *cap_mask_ptr = (unsigned long *)kp->arg, 117f48ad614SDennis Dalessandro cap_mask = *cap_mask_ptr, value, diff, 118f48ad614SDennis Dalessandro write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) | 119f48ad614SDennis Dalessandro HFI1_CAP_WRITABLE_MASK); 120f48ad614SDennis Dalessandro 121f48ad614SDennis Dalessandro ret = kstrtoul(val, 0, &value); 122f48ad614SDennis Dalessandro if (ret) { 123f48ad614SDennis Dalessandro pr_warn("Invalid module parameter value for 'cap_mask'\n"); 124f48ad614SDennis Dalessandro goto done; 125f48ad614SDennis Dalessandro } 126f48ad614SDennis Dalessandro /* Get the changed bits (except the locked bit) */ 127f48ad614SDennis Dalessandro diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK); 128f48ad614SDennis Dalessandro 129f48ad614SDennis Dalessandro /* Remove any bits that are not allowed to change after driver load */ 130f48ad614SDennis Dalessandro if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) { 131f48ad614SDennis Dalessandro pr_warn("Ignoring non-writable capability bits %#lx\n", 132f48ad614SDennis Dalessandro diff & ~write_mask); 133f48ad614SDennis Dalessandro diff &= write_mask; 134f48ad614SDennis Dalessandro } 135f48ad614SDennis Dalessandro 136f48ad614SDennis Dalessandro /* Mask off any reserved bits */ 137f48ad614SDennis Dalessandro diff &= ~HFI1_CAP_RESERVED_MASK; 138f48ad614SDennis Dalessandro /* Clear any previously set and changing bits */ 139f48ad614SDennis Dalessandro cap_mask &= ~diff; 140f48ad614SDennis Dalessandro /* Update the bits with the new capability */ 141f48ad614SDennis Dalessandro cap_mask |= (value & diff); 142f48ad614SDennis Dalessandro /* Check for any kernel/user restrictions */ 143f48ad614SDennis Dalessandro diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^ 144f48ad614SDennis Dalessandro ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT); 145f48ad614SDennis Dalessandro cap_mask &= ~diff; 146f48ad614SDennis Dalessandro /* Set the bitmask to the final set */ 147f48ad614SDennis Dalessandro *cap_mask_ptr = cap_mask; 148f48ad614SDennis Dalessandro done: 149f48ad614SDennis Dalessandro return ret; 150f48ad614SDennis Dalessandro } 151f48ad614SDennis Dalessandro 152f48ad614SDennis Dalessandro static int hfi1_caps_get(char *buffer, const struct kernel_param *kp) 153f48ad614SDennis Dalessandro { 154f48ad614SDennis Dalessandro unsigned long cap_mask = *(unsigned long *)kp->arg; 155f48ad614SDennis Dalessandro 156f48ad614SDennis Dalessandro cap_mask &= ~HFI1_CAP_LOCKED_SMASK; 157f48ad614SDennis Dalessandro cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT); 158f48ad614SDennis Dalessandro 159f48ad614SDennis Dalessandro return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask); 160f48ad614SDennis Dalessandro } 161f48ad614SDennis Dalessandro 162f48ad614SDennis Dalessandro const char *get_unit_name(int unit) 163f48ad614SDennis Dalessandro { 164f48ad614SDennis Dalessandro static char iname[16]; 165f48ad614SDennis Dalessandro 166f48ad614SDennis Dalessandro snprintf(iname, sizeof(iname), DRIVER_NAME "_%u", unit); 167f48ad614SDennis Dalessandro return iname; 168f48ad614SDennis Dalessandro } 169f48ad614SDennis Dalessandro 170f48ad614SDennis Dalessandro const char *get_card_name(struct rvt_dev_info *rdi) 171f48ad614SDennis Dalessandro { 172f48ad614SDennis Dalessandro struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); 173f48ad614SDennis Dalessandro struct hfi1_devdata *dd = container_of(ibdev, 174f48ad614SDennis Dalessandro struct hfi1_devdata, verbs_dev); 175f48ad614SDennis Dalessandro return get_unit_name(dd->unit); 176f48ad614SDennis Dalessandro } 177f48ad614SDennis Dalessandro 178f48ad614SDennis Dalessandro struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi) 179f48ad614SDennis Dalessandro { 180f48ad614SDennis Dalessandro struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi); 181f48ad614SDennis Dalessandro struct hfi1_devdata *dd = container_of(ibdev, 182f48ad614SDennis Dalessandro struct hfi1_devdata, verbs_dev); 183f48ad614SDennis Dalessandro return dd->pcidev; 184f48ad614SDennis Dalessandro } 185f48ad614SDennis Dalessandro 186f48ad614SDennis Dalessandro /* 187f48ad614SDennis Dalessandro * Return count of units with at least one port ACTIVE. 188f48ad614SDennis Dalessandro */ 189f48ad614SDennis Dalessandro int hfi1_count_active_units(void) 190f48ad614SDennis Dalessandro { 191f48ad614SDennis Dalessandro struct hfi1_devdata *dd; 192f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 193f48ad614SDennis Dalessandro unsigned long flags; 194f48ad614SDennis Dalessandro int pidx, nunits_active = 0; 195f48ad614SDennis Dalessandro 196f48ad614SDennis Dalessandro spin_lock_irqsave(&hfi1_devs_lock, flags); 197f48ad614SDennis Dalessandro list_for_each_entry(dd, &hfi1_dev_list, list) { 198cb51c5d2SMike Marciniszyn if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase1) 199f48ad614SDennis Dalessandro continue; 200f48ad614SDennis Dalessandro for (pidx = 0; pidx < dd->num_pports; ++pidx) { 201f48ad614SDennis Dalessandro ppd = dd->pport + pidx; 202f48ad614SDennis Dalessandro if (ppd->lid && ppd->linkup) { 203f48ad614SDennis Dalessandro nunits_active++; 204f48ad614SDennis Dalessandro break; 205f48ad614SDennis Dalessandro } 206f48ad614SDennis Dalessandro } 207f48ad614SDennis Dalessandro } 208f48ad614SDennis Dalessandro spin_unlock_irqrestore(&hfi1_devs_lock, flags); 209f48ad614SDennis Dalessandro return nunits_active; 210f48ad614SDennis Dalessandro } 211f48ad614SDennis Dalessandro 212f48ad614SDennis Dalessandro /* 213f48ad614SDennis Dalessandro * Get address of eager buffer from it's index (allocated in chunks, not 214f48ad614SDennis Dalessandro * contiguous). 215f48ad614SDennis Dalessandro */ 216f48ad614SDennis Dalessandro static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf, 217f48ad614SDennis Dalessandro u8 *update) 218f48ad614SDennis Dalessandro { 219f48ad614SDennis Dalessandro u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf); 220f48ad614SDennis Dalessandro 221f48ad614SDennis Dalessandro *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset; 222f48ad614SDennis Dalessandro return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) + 223f48ad614SDennis Dalessandro (offset * RCV_BUF_BLOCK_SIZE)); 224f48ad614SDennis Dalessandro } 225f48ad614SDennis Dalessandro 2269039746cSDon Hiatt static inline void *hfi1_get_header(struct hfi1_devdata *dd, 2279039746cSDon Hiatt __le32 *rhf_addr) 2289039746cSDon Hiatt { 2299039746cSDon Hiatt u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr)); 2309039746cSDon Hiatt 2319039746cSDon Hiatt return (void *)(rhf_addr - dd->rhf_offset + offset); 2329039746cSDon Hiatt } 2339039746cSDon Hiatt 2349039746cSDon Hiatt static inline struct ib_header *hfi1_get_msgheader(struct hfi1_devdata *dd, 2359039746cSDon Hiatt __le32 *rhf_addr) 2369039746cSDon Hiatt { 2379039746cSDon Hiatt return (struct ib_header *)hfi1_get_header(dd, rhf_addr); 2389039746cSDon Hiatt } 2399039746cSDon Hiatt 24072c07e2bSDon Hiatt static inline struct hfi1_16b_header 24172c07e2bSDon Hiatt *hfi1_get_16B_header(struct hfi1_devdata *dd, 24272c07e2bSDon Hiatt __le32 *rhf_addr) 24372c07e2bSDon Hiatt { 24472c07e2bSDon Hiatt return (struct hfi1_16b_header *)hfi1_get_header(dd, rhf_addr); 24572c07e2bSDon Hiatt } 24672c07e2bSDon Hiatt 247f48ad614SDennis Dalessandro /* 248f48ad614SDennis Dalessandro * Validate and encode the a given RcvArray Buffer size. 249f48ad614SDennis Dalessandro * The function will check whether the given size falls within 250f48ad614SDennis Dalessandro * allowed size ranges for the respective type and, optionally, 251f48ad614SDennis Dalessandro * return the proper encoding. 252f48ad614SDennis Dalessandro */ 253a82a7fcdSMike Marciniszyn int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded) 254f48ad614SDennis Dalessandro { 255f48ad614SDennis Dalessandro if (unlikely(!PAGE_ALIGNED(size))) 256f48ad614SDennis Dalessandro return 0; 257f48ad614SDennis Dalessandro if (unlikely(size < MIN_EAGER_BUFFER)) 258f48ad614SDennis Dalessandro return 0; 259f48ad614SDennis Dalessandro if (size > 260f48ad614SDennis Dalessandro (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER)) 261f48ad614SDennis Dalessandro return 0; 262f48ad614SDennis Dalessandro if (encoded) 263f48ad614SDennis Dalessandro *encoded = ilog2(size / PAGE_SIZE) + 1; 264f48ad614SDennis Dalessandro return 1; 265f48ad614SDennis Dalessandro } 266f48ad614SDennis Dalessandro 267f48ad614SDennis Dalessandro static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd, 268f48ad614SDennis Dalessandro struct hfi1_packet *packet) 269f48ad614SDennis Dalessandro { 270261a4351SMike Marciniszyn struct ib_header *rhdr = packet->hdr; 271f48ad614SDennis Dalessandro u32 rte = rhf_rcv_type_err(packet->rhf); 2725786adf3SDon Hiatt u32 mlid_base; 273f3e862cbSSebastian Sanchez struct hfi1_ibport *ibp = rcd_to_iport(rcd); 274f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 275f48ad614SDennis Dalessandro struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 276f48ad614SDennis Dalessandro 277f48ad614SDennis Dalessandro if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR)) 278f48ad614SDennis Dalessandro return; 279f48ad614SDennis Dalessandro 2805786adf3SDon Hiatt if (packet->etype == RHF_RCV_TYPE_BYPASS) { 2815786adf3SDon Hiatt goto drop; 2825786adf3SDon Hiatt } else { 2835786adf3SDon Hiatt u8 lnh = ib_get_lnh(rhdr); 2845786adf3SDon Hiatt 2855786adf3SDon Hiatt mlid_base = be16_to_cpu(IB_MULTICAST_LID_BASE); 2869039746cSDon Hiatt if (lnh == HFI1_LRH_BTH) { 2879039746cSDon Hiatt packet->ohdr = &rhdr->u.oth; 2889039746cSDon Hiatt } else if (lnh == HFI1_LRH_GRH) { 2899039746cSDon Hiatt packet->ohdr = &rhdr->u.l.oth; 2909039746cSDon Hiatt packet->grh = &rhdr->u.l.grh; 2919039746cSDon Hiatt } else { 2929039746cSDon Hiatt goto drop; 2939039746cSDon Hiatt } 2945786adf3SDon Hiatt } 2959039746cSDon Hiatt 296f48ad614SDennis Dalessandro if (packet->rhf & RHF_TID_ERR) { 297f48ad614SDennis Dalessandro /* For TIDERR and RC QPs preemptively schedule a NAK */ 298f48ad614SDennis Dalessandro u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */ 2999039746cSDon Hiatt u32 dlid = ib_get_dlid(rhdr); 300f48ad614SDennis Dalessandro u32 qp_num; 301f48ad614SDennis Dalessandro 302f48ad614SDennis Dalessandro /* Sanity check packet */ 303f48ad614SDennis Dalessandro if (tlen < 24) 304f48ad614SDennis Dalessandro goto drop; 305f48ad614SDennis Dalessandro 306f48ad614SDennis Dalessandro /* Check for GRH */ 3075786adf3SDon Hiatt if (packet->grh) { 308f48ad614SDennis Dalessandro u32 vtf; 3099039746cSDon Hiatt struct ib_grh *grh = packet->grh; 310f48ad614SDennis Dalessandro 3119039746cSDon Hiatt if (grh->next_hdr != IB_GRH_NEXT_HDR) 312f48ad614SDennis Dalessandro goto drop; 3139039746cSDon Hiatt vtf = be32_to_cpu(grh->version_tclass_flow); 314f48ad614SDennis Dalessandro if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 315f48ad614SDennis Dalessandro goto drop; 316f48ad614SDennis Dalessandro } 3179039746cSDon Hiatt 318f48ad614SDennis Dalessandro /* Get the destination QP number. */ 3199039746cSDon Hiatt qp_num = ib_bth_get_qpn(packet->ohdr); 3209039746cSDon Hiatt if (dlid < mlid_base) { 321f48ad614SDennis Dalessandro struct rvt_qp *qp; 322f48ad614SDennis Dalessandro unsigned long flags; 323f48ad614SDennis Dalessandro 324f48ad614SDennis Dalessandro rcu_read_lock(); 325f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num); 326f48ad614SDennis Dalessandro if (!qp) { 327f48ad614SDennis Dalessandro rcu_read_unlock(); 328f48ad614SDennis Dalessandro goto drop; 329f48ad614SDennis Dalessandro } 330f48ad614SDennis Dalessandro 331f48ad614SDennis Dalessandro /* 332f48ad614SDennis Dalessandro * Handle only RC QPs - for other QP types drop error 333f48ad614SDennis Dalessandro * packet. 334f48ad614SDennis Dalessandro */ 335f48ad614SDennis Dalessandro spin_lock_irqsave(&qp->r_lock, flags); 336f48ad614SDennis Dalessandro 337f48ad614SDennis Dalessandro /* Check for valid receive state. */ 338f48ad614SDennis Dalessandro if (!(ib_rvt_state_ops[qp->state] & 339f48ad614SDennis Dalessandro RVT_PROCESS_RECV_OK)) { 340f48ad614SDennis Dalessandro ibp->rvp.n_pkt_drops++; 341f48ad614SDennis Dalessandro } 342f48ad614SDennis Dalessandro 343f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 344f48ad614SDennis Dalessandro case IB_QPT_RC: 3459039746cSDon Hiatt hfi1_rc_hdrerr(rcd, packet, qp); 346f48ad614SDennis Dalessandro break; 347f48ad614SDennis Dalessandro default: 348f48ad614SDennis Dalessandro /* For now don't handle any other QP types */ 349f48ad614SDennis Dalessandro break; 350f48ad614SDennis Dalessandro } 351f48ad614SDennis Dalessandro 352f48ad614SDennis Dalessandro spin_unlock_irqrestore(&qp->r_lock, flags); 353f48ad614SDennis Dalessandro rcu_read_unlock(); 354f48ad614SDennis Dalessandro } /* Unicast QP */ 355f48ad614SDennis Dalessandro } /* Valid packet with TIDErr */ 356f48ad614SDennis Dalessandro 357f48ad614SDennis Dalessandro /* handle "RcvTypeErr" flags */ 358f48ad614SDennis Dalessandro switch (rte) { 359f48ad614SDennis Dalessandro case RHF_RTE_ERROR_OP_CODE_ERR: 360f48ad614SDennis Dalessandro { 361f48ad614SDennis Dalessandro void *ebuf = NULL; 3629039746cSDon Hiatt u8 opcode; 363f48ad614SDennis Dalessandro 364f48ad614SDennis Dalessandro if (rhf_use_egr_bfr(packet->rhf)) 365f48ad614SDennis Dalessandro ebuf = packet->ebuf; 366f48ad614SDennis Dalessandro 367f48ad614SDennis Dalessandro if (!ebuf) 368f48ad614SDennis Dalessandro goto drop; /* this should never happen */ 369f48ad614SDennis Dalessandro 3709039746cSDon Hiatt opcode = ib_bth_get_opcode(packet->ohdr); 371f48ad614SDennis Dalessandro if (opcode == IB_OPCODE_CNP) { 372f48ad614SDennis Dalessandro /* 373f48ad614SDennis Dalessandro * Only in pre-B0 h/w is the CNP_OPCODE handled 374f48ad614SDennis Dalessandro * via this code path. 375f48ad614SDennis Dalessandro */ 376f48ad614SDennis Dalessandro struct rvt_qp *qp = NULL; 377f48ad614SDennis Dalessandro u32 lqpn, rqpn; 378f48ad614SDennis Dalessandro u16 rlid; 379f48ad614SDennis Dalessandro u8 svc_type, sl, sc5; 380f48ad614SDennis Dalessandro 381aad559c2SDasaratharaman Chandramouli sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf); 382f48ad614SDennis Dalessandro sl = ibp->sc_to_sl[sc5]; 383f48ad614SDennis Dalessandro 3849039746cSDon Hiatt lqpn = ib_bth_get_qpn(packet->ohdr); 385f48ad614SDennis Dalessandro rcu_read_lock(); 386f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn); 387f48ad614SDennis Dalessandro if (!qp) { 388f48ad614SDennis Dalessandro rcu_read_unlock(); 389f48ad614SDennis Dalessandro goto drop; 390f48ad614SDennis Dalessandro } 391f48ad614SDennis Dalessandro 392f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 393f48ad614SDennis Dalessandro case IB_QPT_UD: 394f48ad614SDennis Dalessandro rlid = 0; 395f48ad614SDennis Dalessandro rqpn = 0; 396f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UD; 397f48ad614SDennis Dalessandro break; 398f48ad614SDennis Dalessandro case IB_QPT_UC: 399cb427057SDon Hiatt rlid = ib_get_slid(rhdr); 400f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 401f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UC; 402f48ad614SDennis Dalessandro break; 403f48ad614SDennis Dalessandro default: 404f48ad614SDennis Dalessandro goto drop; 405f48ad614SDennis Dalessandro } 406f48ad614SDennis Dalessandro 407f48ad614SDennis Dalessandro process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); 408f48ad614SDennis Dalessandro rcu_read_unlock(); 409f48ad614SDennis Dalessandro } 410f48ad614SDennis Dalessandro 411f48ad614SDennis Dalessandro packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK; 412f48ad614SDennis Dalessandro break; 413f48ad614SDennis Dalessandro } 414f48ad614SDennis Dalessandro default: 415f48ad614SDennis Dalessandro break; 416f48ad614SDennis Dalessandro } 417f48ad614SDennis Dalessandro 418f48ad614SDennis Dalessandro drop: 419f48ad614SDennis Dalessandro return; 420f48ad614SDennis Dalessandro } 421f48ad614SDennis Dalessandro 422f48ad614SDennis Dalessandro static inline void init_packet(struct hfi1_ctxtdata *rcd, 423f48ad614SDennis Dalessandro struct hfi1_packet *packet) 424f48ad614SDennis Dalessandro { 425f48ad614SDennis Dalessandro packet->rsize = rcd->rcvhdrqentsize; /* words */ 426f48ad614SDennis Dalessandro packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */ 427f48ad614SDennis Dalessandro packet->rcd = rcd; 428f48ad614SDennis Dalessandro packet->updegr = 0; 429f48ad614SDennis Dalessandro packet->etail = -1; 430f48ad614SDennis Dalessandro packet->rhf_addr = get_rhf_addr(rcd); 431f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 432f48ad614SDennis Dalessandro packet->rhqoff = rcd->head; 433f48ad614SDennis Dalessandro packet->numpkt = 0; 434f48ad614SDennis Dalessandro } 435f48ad614SDennis Dalessandro 436e2fdbc23SBart Van Assche /* We support only two types - 9B and 16B for now */ 437e2fdbc23SBart Van Assche static const hfi1_handle_cnp hfi1_handle_cnp_tbl[2] = { 438e2fdbc23SBart Van Assche [HFI1_PKT_TYPE_9B] = &return_cnp, 439e2fdbc23SBart Van Assche [HFI1_PKT_TYPE_16B] = &return_cnp_16B 440e2fdbc23SBart Van Assche }; 441e2fdbc23SBart Van Assche 4425fd2b562SMitko Haralanov void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt, 4435fd2b562SMitko Haralanov bool do_cnp) 444f48ad614SDennis Dalessandro { 445f48ad614SDennis Dalessandro struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); 446261a4351SMike Marciniszyn struct ib_other_headers *ohdr = pkt->ohdr; 4479039746cSDon Hiatt struct ib_grh *grh = pkt->grh; 4485fd2b562SMitko Haralanov u32 rqpn = 0, bth1; 44988733e3bSDon Hiatt u16 pkey, rlid, dlid = ib_get_dlid(pkt->hdr); 45088733e3bSDon Hiatt u8 hdr_type, sc, svc_type; 4515fd2b562SMitko Haralanov bool is_mcast = false; 4525fd2b562SMitko Haralanov 45388733e3bSDon Hiatt if (pkt->etype == RHF_RCV_TYPE_BYPASS) { 45488733e3bSDon Hiatt is_mcast = hfi1_is_16B_mcast(dlid); 45588733e3bSDon Hiatt pkey = hfi1_16B_get_pkey(pkt->hdr); 45688733e3bSDon Hiatt sc = hfi1_16B_get_sc(pkt->hdr); 45788733e3bSDon Hiatt hdr_type = HFI1_PKT_TYPE_16B; 45888733e3bSDon Hiatt } else { 45988733e3bSDon Hiatt is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && 46088733e3bSDon Hiatt (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); 46188733e3bSDon Hiatt pkey = ib_bth_get_pkey(ohdr); 46288733e3bSDon Hiatt sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf); 46388733e3bSDon Hiatt hdr_type = HFI1_PKT_TYPE_9B; 46488733e3bSDon Hiatt } 46588733e3bSDon Hiatt 466f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 467f48ad614SDennis Dalessandro case IB_QPT_SMI: 468f48ad614SDennis Dalessandro case IB_QPT_GSI: 469f48ad614SDennis Dalessandro case IB_QPT_UD: 47088733e3bSDon Hiatt rlid = ib_get_slid(pkt->hdr); 47188733e3bSDon Hiatt rqpn = ib_get_sqpn(pkt->ohdr); 472f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UD; 473f48ad614SDennis Dalessandro break; 474f48ad614SDennis Dalessandro case IB_QPT_UC: 475d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 476f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 477f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UC; 478f48ad614SDennis Dalessandro break; 479f48ad614SDennis Dalessandro case IB_QPT_RC: 480d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 481f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 482f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_RC; 483f48ad614SDennis Dalessandro break; 484f48ad614SDennis Dalessandro default: 485f48ad614SDennis Dalessandro return; 486f48ad614SDennis Dalessandro } 487f48ad614SDennis Dalessandro 4885fd2b562SMitko Haralanov bth1 = be32_to_cpu(ohdr->bth[1]); 48988733e3bSDon Hiatt /* Call appropriate CNP handler */ 49088733e3bSDon Hiatt if (do_cnp && (bth1 & IB_FECN_SMASK)) 49188733e3bSDon Hiatt hfi1_handle_cnp_tbl[hdr_type](ibp, qp, rqpn, pkey, 49288733e3bSDon Hiatt dlid, rlid, sc, grh); 493f48ad614SDennis Dalessandro 4943d591099SDon Hiatt if (!is_mcast && (bth1 & IB_BECN_SMASK)) { 495f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 496f48ad614SDennis Dalessandro u32 lqpn = bth1 & RVT_QPN_MASK; 4975fd2b562SMitko Haralanov u8 sl = ibp->sc_to_sl[sc]; 498f48ad614SDennis Dalessandro 499f48ad614SDennis Dalessandro process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); 500f48ad614SDennis Dalessandro } 5015fd2b562SMitko Haralanov 502f48ad614SDennis Dalessandro } 503f48ad614SDennis Dalessandro 504f48ad614SDennis Dalessandro struct ps_mdata { 505f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd; 506f48ad614SDennis Dalessandro u32 rsize; 507f48ad614SDennis Dalessandro u32 maxcnt; 508f48ad614SDennis Dalessandro u32 ps_head; 509f48ad614SDennis Dalessandro u32 ps_tail; 510f48ad614SDennis Dalessandro u32 ps_seq; 511f48ad614SDennis Dalessandro }; 512f48ad614SDennis Dalessandro 513f48ad614SDennis Dalessandro static inline void init_ps_mdata(struct ps_mdata *mdata, 514f48ad614SDennis Dalessandro struct hfi1_packet *packet) 515f48ad614SDennis Dalessandro { 516f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 517f48ad614SDennis Dalessandro 518f48ad614SDennis Dalessandro mdata->rcd = rcd; 519f48ad614SDennis Dalessandro mdata->rsize = packet->rsize; 520f48ad614SDennis Dalessandro mdata->maxcnt = packet->maxcnt; 521f48ad614SDennis Dalessandro mdata->ps_head = packet->rhqoff; 522f48ad614SDennis Dalessandro 523f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 524f48ad614SDennis Dalessandro mdata->ps_tail = get_rcvhdrtail(rcd); 525f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) 526f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 527f48ad614SDennis Dalessandro else 528f48ad614SDennis Dalessandro mdata->ps_seq = 0; /* not used with DMA_RTAIL */ 529f48ad614SDennis Dalessandro } else { 530f48ad614SDennis Dalessandro mdata->ps_tail = 0; /* used only with DMA_RTAIL*/ 531f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 532f48ad614SDennis Dalessandro } 533f48ad614SDennis Dalessandro } 534f48ad614SDennis Dalessandro 535f48ad614SDennis Dalessandro static inline int ps_done(struct ps_mdata *mdata, u64 rhf, 536f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 537f48ad614SDennis Dalessandro { 538f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) 539f48ad614SDennis Dalessandro return mdata->ps_head == mdata->ps_tail; 540f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 541f48ad614SDennis Dalessandro } 542f48ad614SDennis Dalessandro 543f48ad614SDennis Dalessandro static inline int ps_skip(struct ps_mdata *mdata, u64 rhf, 544f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 545f48ad614SDennis Dalessandro { 546f48ad614SDennis Dalessandro /* 547f48ad614SDennis Dalessandro * Control context can potentially receive an invalid rhf. 548f48ad614SDennis Dalessandro * Drop such packets. 549f48ad614SDennis Dalessandro */ 550f48ad614SDennis Dalessandro if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail)) 551f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 552f48ad614SDennis Dalessandro 553f48ad614SDennis Dalessandro return 0; 554f48ad614SDennis Dalessandro } 555f48ad614SDennis Dalessandro 556f48ad614SDennis Dalessandro static inline void update_ps_mdata(struct ps_mdata *mdata, 557f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 558f48ad614SDennis Dalessandro { 559f48ad614SDennis Dalessandro mdata->ps_head += mdata->rsize; 560f48ad614SDennis Dalessandro if (mdata->ps_head >= mdata->maxcnt) 561f48ad614SDennis Dalessandro mdata->ps_head = 0; 562f48ad614SDennis Dalessandro 563f48ad614SDennis Dalessandro /* Control context must do seq counting */ 564f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) || 565f48ad614SDennis Dalessandro (rcd->ctxt == HFI1_CTRL_CTXT)) { 566f48ad614SDennis Dalessandro if (++mdata->ps_seq > 13) 567f48ad614SDennis Dalessandro mdata->ps_seq = 1; 568f48ad614SDennis Dalessandro } 569f48ad614SDennis Dalessandro } 570f48ad614SDennis Dalessandro 571f48ad614SDennis Dalessandro /* 572f48ad614SDennis Dalessandro * prescan_rxq - search through the receive queue looking for packets 573f48ad614SDennis Dalessandro * containing Excplicit Congestion Notifications (FECNs, or BECNs). 574f48ad614SDennis Dalessandro * When an ECN is found, process the Congestion Notification, and toggle 575f48ad614SDennis Dalessandro * it off. 576f48ad614SDennis Dalessandro * This is declared as a macro to allow quick checking of the port to avoid 577f48ad614SDennis Dalessandro * the overhead of a function call if not enabled. 578f48ad614SDennis Dalessandro */ 579f48ad614SDennis Dalessandro #define prescan_rxq(rcd, packet) \ 580f48ad614SDennis Dalessandro do { \ 581f48ad614SDennis Dalessandro if (rcd->ppd->cc_prescan) \ 582f48ad614SDennis Dalessandro __prescan_rxq(packet); \ 583f48ad614SDennis Dalessandro } while (0) 584f48ad614SDennis Dalessandro static void __prescan_rxq(struct hfi1_packet *packet) 585f48ad614SDennis Dalessandro { 586f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 587f48ad614SDennis Dalessandro struct ps_mdata mdata; 588f48ad614SDennis Dalessandro 589f48ad614SDennis Dalessandro init_ps_mdata(&mdata, packet); 590f48ad614SDennis Dalessandro 591f48ad614SDennis Dalessandro while (1) { 592f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 593f3e862cbSSebastian Sanchez struct hfi1_ibport *ibp = rcd_to_iport(rcd); 594f48ad614SDennis Dalessandro __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head + 595f48ad614SDennis Dalessandro dd->rhf_offset; 596f48ad614SDennis Dalessandro struct rvt_qp *qp; 597261a4351SMike Marciniszyn struct ib_header *hdr; 598f48ad614SDennis Dalessandro struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 599f48ad614SDennis Dalessandro u64 rhf = rhf_to_cpu(rhf_addr); 600f48ad614SDennis Dalessandro u32 etype = rhf_rcv_type(rhf), qpn, bth1; 601f48ad614SDennis Dalessandro int is_ecn = 0; 602f48ad614SDennis Dalessandro u8 lnh; 603f48ad614SDennis Dalessandro 604f48ad614SDennis Dalessandro if (ps_done(&mdata, rhf, rcd)) 605f48ad614SDennis Dalessandro break; 606f48ad614SDennis Dalessandro 607f48ad614SDennis Dalessandro if (ps_skip(&mdata, rhf, rcd)) 608f48ad614SDennis Dalessandro goto next; 609f48ad614SDennis Dalessandro 610f48ad614SDennis Dalessandro if (etype != RHF_RCV_TYPE_IB) 611f48ad614SDennis Dalessandro goto next; 612f48ad614SDennis Dalessandro 613f2d8a0b3SDasaratharaman Chandramouli packet->hdr = hfi1_get_msgheader(dd, rhf_addr); 614f2d8a0b3SDasaratharaman Chandramouli hdr = packet->hdr; 615cb427057SDon Hiatt lnh = ib_get_lnh(hdr); 616f48ad614SDennis Dalessandro 617f2d8a0b3SDasaratharaman Chandramouli if (lnh == HFI1_LRH_BTH) { 618f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.oth; 6199039746cSDon Hiatt packet->grh = NULL; 620f2d8a0b3SDasaratharaman Chandramouli } else if (lnh == HFI1_LRH_GRH) { 621f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.l.oth; 6229039746cSDon Hiatt packet->grh = &hdr->u.l.grh; 623f2d8a0b3SDasaratharaman Chandramouli } else { 624f48ad614SDennis Dalessandro goto next; /* just in case */ 625f2d8a0b3SDasaratharaman Chandramouli } 6265fd2b562SMitko Haralanov 627f2d8a0b3SDasaratharaman Chandramouli bth1 = be32_to_cpu(packet->ohdr->bth[1]); 6283d591099SDon Hiatt is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK)); 629f48ad614SDennis Dalessandro 630f48ad614SDennis Dalessandro if (!is_ecn) 631f48ad614SDennis Dalessandro goto next; 632f48ad614SDennis Dalessandro 633f48ad614SDennis Dalessandro qpn = bth1 & RVT_QPN_MASK; 634f48ad614SDennis Dalessandro rcu_read_lock(); 635f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn); 636f48ad614SDennis Dalessandro 637f48ad614SDennis Dalessandro if (!qp) { 638f48ad614SDennis Dalessandro rcu_read_unlock(); 639f48ad614SDennis Dalessandro goto next; 640f48ad614SDennis Dalessandro } 641f48ad614SDennis Dalessandro 6425fd2b562SMitko Haralanov process_ecn(qp, packet, true); 643f48ad614SDennis Dalessandro rcu_read_unlock(); 644f48ad614SDennis Dalessandro 645f48ad614SDennis Dalessandro /* turn off BECN, FECN */ 6463d591099SDon Hiatt bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK); 647f2d8a0b3SDasaratharaman Chandramouli packet->ohdr->bth[1] = cpu_to_be32(bth1); 648f48ad614SDennis Dalessandro next: 649f48ad614SDennis Dalessandro update_ps_mdata(&mdata, rcd); 650f48ad614SDennis Dalessandro } 651f48ad614SDennis Dalessandro } 652f48ad614SDennis Dalessandro 653a82a7fcdSMike Marciniszyn static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd) 654a82a7fcdSMike Marciniszyn { 655a82a7fcdSMike Marciniszyn struct rvt_qp *qp, *nqp; 656a82a7fcdSMike Marciniszyn 657a82a7fcdSMike Marciniszyn /* 658a82a7fcdSMike Marciniszyn * Iterate over all QPs waiting to respond. 659a82a7fcdSMike Marciniszyn * The list won't change since the IRQ is only run on one CPU. 660a82a7fcdSMike Marciniszyn */ 661a82a7fcdSMike Marciniszyn list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) { 662a82a7fcdSMike Marciniszyn list_del_init(&qp->rspwait); 663a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_NAK) { 664a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_NAK; 665a82a7fcdSMike Marciniszyn hfi1_send_rc_ack(rcd, qp, 0); 666a82a7fcdSMike Marciniszyn } 667a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_SEND) { 668a82a7fcdSMike Marciniszyn unsigned long flags; 669a82a7fcdSMike Marciniszyn 670a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_SEND; 671a82a7fcdSMike Marciniszyn spin_lock_irqsave(&qp->s_lock, flags); 672a82a7fcdSMike Marciniszyn if (ib_rvt_state_ops[qp->state] & 673a82a7fcdSMike Marciniszyn RVT_PROCESS_OR_FLUSH_SEND) 674a82a7fcdSMike Marciniszyn hfi1_schedule_send(qp); 675a82a7fcdSMike Marciniszyn spin_unlock_irqrestore(&qp->s_lock, flags); 676a82a7fcdSMike Marciniszyn } 677a82a7fcdSMike Marciniszyn rvt_put_qp(qp); 678a82a7fcdSMike Marciniszyn } 679a82a7fcdSMike Marciniszyn } 680a82a7fcdSMike Marciniszyn 681a82a7fcdSMike Marciniszyn static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread) 682a82a7fcdSMike Marciniszyn { 683a82a7fcdSMike Marciniszyn if (thread) { 684a82a7fcdSMike Marciniszyn if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0) 685a82a7fcdSMike Marciniszyn /* allow defered processing */ 686a82a7fcdSMike Marciniszyn process_rcv_qp_work(packet->rcd); 687a82a7fcdSMike Marciniszyn cond_resched(); 688a82a7fcdSMike Marciniszyn return RCV_PKT_OK; 689a82a7fcdSMike Marciniszyn } else { 690a82a7fcdSMike Marciniszyn this_cpu_inc(*packet->rcd->dd->rcv_limit); 691a82a7fcdSMike Marciniszyn return RCV_PKT_LIMIT; 692a82a7fcdSMike Marciniszyn } 693a82a7fcdSMike Marciniszyn } 694a82a7fcdSMike Marciniszyn 695a82a7fcdSMike Marciniszyn static inline int check_max_packet(struct hfi1_packet *packet, int thread) 696f48ad614SDennis Dalessandro { 697f48ad614SDennis Dalessandro int ret = RCV_PKT_OK; 698f48ad614SDennis Dalessandro 699a82a7fcdSMike Marciniszyn if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0)) 700a82a7fcdSMike Marciniszyn ret = max_packet_exceeded(packet, thread); 701a82a7fcdSMike Marciniszyn return ret; 702a82a7fcdSMike Marciniszyn } 703a82a7fcdSMike Marciniszyn 704a82a7fcdSMike Marciniszyn static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread) 705a82a7fcdSMike Marciniszyn { 706a82a7fcdSMike Marciniszyn int ret; 707a82a7fcdSMike Marciniszyn 708f48ad614SDennis Dalessandro /* Set up for the next packet */ 709f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 710f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 711f48ad614SDennis Dalessandro packet->rhqoff = 0; 712f48ad614SDennis Dalessandro 713f48ad614SDennis Dalessandro packet->numpkt++; 714a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 715f48ad614SDennis Dalessandro 716f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 717f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 718f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 719f48ad614SDennis Dalessandro 720f48ad614SDennis Dalessandro return ret; 721f48ad614SDennis Dalessandro } 722f48ad614SDennis Dalessandro 723f48ad614SDennis Dalessandro static inline int process_rcv_packet(struct hfi1_packet *packet, int thread) 724f48ad614SDennis Dalessandro { 725a82a7fcdSMike Marciniszyn int ret; 726f48ad614SDennis Dalessandro 727f48ad614SDennis Dalessandro packet->etype = rhf_rcv_type(packet->rhf); 7289039746cSDon Hiatt 729f48ad614SDennis Dalessandro /* total length */ 730f48ad614SDennis Dalessandro packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */ 731f48ad614SDennis Dalessandro /* retrieve eager buffer details */ 732f48ad614SDennis Dalessandro packet->ebuf = NULL; 733f48ad614SDennis Dalessandro if (rhf_use_egr_bfr(packet->rhf)) { 734f48ad614SDennis Dalessandro packet->etail = rhf_egr_index(packet->rhf); 735f48ad614SDennis Dalessandro packet->ebuf = get_egrbuf(packet->rcd, packet->rhf, 736f48ad614SDennis Dalessandro &packet->updegr); 737f48ad614SDennis Dalessandro /* 738f48ad614SDennis Dalessandro * Prefetch the contents of the eager buffer. It is 739f48ad614SDennis Dalessandro * OK to send a negative length to prefetch_range(). 740f48ad614SDennis Dalessandro * The +2 is the size of the RHF. 741f48ad614SDennis Dalessandro */ 742f48ad614SDennis Dalessandro prefetch_range(packet->ebuf, 743f48ad614SDennis Dalessandro packet->tlen - ((packet->rcd->rcvhdrqentsize - 744f48ad614SDennis Dalessandro (rhf_hdrq_offset(packet->rhf) 745f48ad614SDennis Dalessandro + 2)) * 4)); 746f48ad614SDennis Dalessandro } 747f48ad614SDennis Dalessandro 748f48ad614SDennis Dalessandro /* 749f48ad614SDennis Dalessandro * Call a type specific handler for the packet. We 750f48ad614SDennis Dalessandro * should be able to trust that etype won't be beyond 751f48ad614SDennis Dalessandro * the range of valid indexes. If so something is really 752f48ad614SDennis Dalessandro * wrong and we can probably just let things come 753f48ad614SDennis Dalessandro * crashing down. There is no need to eat another 754f48ad614SDennis Dalessandro * comparison in this performance critical code. 755f48ad614SDennis Dalessandro */ 756f48ad614SDennis Dalessandro packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet); 757f48ad614SDennis Dalessandro packet->numpkt++; 758f48ad614SDennis Dalessandro 759f48ad614SDennis Dalessandro /* Set up for the next packet */ 760f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 761f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 762f48ad614SDennis Dalessandro packet->rhqoff = 0; 763f48ad614SDennis Dalessandro 764a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 765f48ad614SDennis Dalessandro 766f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 767f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 768f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 769f48ad614SDennis Dalessandro 770f48ad614SDennis Dalessandro return ret; 771f48ad614SDennis Dalessandro } 772f48ad614SDennis Dalessandro 773f48ad614SDennis Dalessandro static inline void process_rcv_update(int last, struct hfi1_packet *packet) 774f48ad614SDennis Dalessandro { 775f48ad614SDennis Dalessandro /* 776f48ad614SDennis Dalessandro * Update head regs etc., every 16 packets, if not last pkt, 777f48ad614SDennis Dalessandro * to help prevent rcvhdrq overflows, when many packets 778f48ad614SDennis Dalessandro * are processed and queue is nearly full. 779f48ad614SDennis Dalessandro * Don't request an interrupt for intermediate updates. 780f48ad614SDennis Dalessandro */ 781f48ad614SDennis Dalessandro if (!last && !(packet->numpkt & 0xf)) { 782f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rhqoff, packet->updegr, 783f48ad614SDennis Dalessandro packet->etail, 0, 0); 784f48ad614SDennis Dalessandro packet->updegr = 0; 785f48ad614SDennis Dalessandro } 7869039746cSDon Hiatt packet->grh = NULL; 787f48ad614SDennis Dalessandro } 788f48ad614SDennis Dalessandro 789f48ad614SDennis Dalessandro static inline void finish_packet(struct hfi1_packet *packet) 790f48ad614SDennis Dalessandro { 791f48ad614SDennis Dalessandro /* 792f48ad614SDennis Dalessandro * Nothing we need to free for the packet. 793f48ad614SDennis Dalessandro * 794f48ad614SDennis Dalessandro * The only thing we need to do is a final update and call for an 795f48ad614SDennis Dalessandro * interrupt 796f48ad614SDennis Dalessandro */ 797f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rcd->head, packet->updegr, 798f48ad614SDennis Dalessandro packet->etail, rcv_intr_dynamic, packet->numpkt); 799f48ad614SDennis Dalessandro } 800f48ad614SDennis Dalessandro 801f48ad614SDennis Dalessandro /* 802f48ad614SDennis Dalessandro * Handle receive interrupts when using the no dma rtail option. 803f48ad614SDennis Dalessandro */ 804f48ad614SDennis Dalessandro int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread) 805f48ad614SDennis Dalessandro { 806f48ad614SDennis Dalessandro u32 seq; 807f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 808f48ad614SDennis Dalessandro struct hfi1_packet packet; 809f48ad614SDennis Dalessandro 810f48ad614SDennis Dalessandro init_packet(rcd, &packet); 811f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 812f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) { 813f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 814f48ad614SDennis Dalessandro goto bail; 815f48ad614SDennis Dalessandro } 816f48ad614SDennis Dalessandro 817f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 818f48ad614SDennis Dalessandro 819f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 820f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 821f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 822f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 823f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 824f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 825f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 826f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 827f48ad614SDennis Dalessandro } 828a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 829a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 830f48ad614SDennis Dalessandro bail: 831f48ad614SDennis Dalessandro finish_packet(&packet); 832f48ad614SDennis Dalessandro return last; 833f48ad614SDennis Dalessandro } 834f48ad614SDennis Dalessandro 835f48ad614SDennis Dalessandro int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread) 836f48ad614SDennis Dalessandro { 837f48ad614SDennis Dalessandro u32 hdrqtail; 838f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 839f48ad614SDennis Dalessandro struct hfi1_packet packet; 840f48ad614SDennis Dalessandro 841f48ad614SDennis Dalessandro init_packet(rcd, &packet); 842f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 843f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 844f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 845f48ad614SDennis Dalessandro goto bail; 846f48ad614SDennis Dalessandro } 847f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 848f48ad614SDennis Dalessandro 849f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 850f48ad614SDennis Dalessandro 851f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 852f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 853f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 854f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 855f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 856f48ad614SDennis Dalessandro } 857a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 858a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 859f48ad614SDennis Dalessandro bail: 860f48ad614SDennis Dalessandro finish_packet(&packet); 861f48ad614SDennis Dalessandro return last; 862f48ad614SDennis Dalessandro } 863f48ad614SDennis Dalessandro 864e6f7622dSMichael J. Ruhl static inline void set_nodma_rtail(struct hfi1_devdata *dd, u16 ctxt) 865f48ad614SDennis Dalessandro { 866d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 867e6f7622dSMichael J. Ruhl u16 i; 868f48ad614SDennis Dalessandro 8692280740fSVishwanathapura, Niranjana /* 8702280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 8712280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 8722280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 8732280740fSVishwanathapura, Niranjana */ 8742280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 875d59075adSMichael J. Ruhl rcd = hfi1_rcd_get_by_index_safe(dd, ctxt); 876d295dbebSMichael J. Ruhl if (rcd) { 877d295dbebSMichael J. Ruhl rcd->do_interrupt = 8782280740fSVishwanathapura, Niranjana &handle_receive_interrupt_nodma_rtail; 879d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 880d295dbebSMichael J. Ruhl } 8812280740fSVishwanathapura, Niranjana return; 8822280740fSVishwanathapura, Niranjana } 8832280740fSVishwanathapura, Niranjana 884d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) { 885d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 886d295dbebSMichael J. Ruhl if (rcd) 887d295dbebSMichael J. Ruhl rcd->do_interrupt = 888f48ad614SDennis Dalessandro &handle_receive_interrupt_nodma_rtail; 889d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 890d295dbebSMichael J. Ruhl } 891f48ad614SDennis Dalessandro } 892f48ad614SDennis Dalessandro 893e6f7622dSMichael J. Ruhl static inline void set_dma_rtail(struct hfi1_devdata *dd, u16 ctxt) 894f48ad614SDennis Dalessandro { 895d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 896e6f7622dSMichael J. Ruhl u16 i; 897f48ad614SDennis Dalessandro 8982280740fSVishwanathapura, Niranjana /* 8992280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 9002280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 9012280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 9022280740fSVishwanathapura, Niranjana */ 9032280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 904d59075adSMichael J. Ruhl rcd = hfi1_rcd_get_by_index_safe(dd, ctxt); 905d295dbebSMichael J. Ruhl if (rcd) { 906d295dbebSMichael J. Ruhl rcd->do_interrupt = 9072280740fSVishwanathapura, Niranjana &handle_receive_interrupt_dma_rtail; 908d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 909d295dbebSMichael J. Ruhl } 9102280740fSVishwanathapura, Niranjana return; 9112280740fSVishwanathapura, Niranjana } 9122280740fSVishwanathapura, Niranjana 913d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) { 914d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 915d295dbebSMichael J. Ruhl if (rcd) 916d295dbebSMichael J. Ruhl rcd->do_interrupt = 917f48ad614SDennis Dalessandro &handle_receive_interrupt_dma_rtail; 918d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 919d295dbebSMichael J. Ruhl } 920f48ad614SDennis Dalessandro } 921f48ad614SDennis Dalessandro 922f48ad614SDennis Dalessandro void set_all_slowpath(struct hfi1_devdata *dd) 923f48ad614SDennis Dalessandro { 924d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 925e6f7622dSMichael J. Ruhl u16 i; 926f48ad614SDennis Dalessandro 927f48ad614SDennis Dalessandro /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */ 9282280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) { 929d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 930d295dbebSMichael J. Ruhl if (!rcd) 931d295dbebSMichael J. Ruhl continue; 932cc9a97eaSNiranjana Vishwanathapura if (i < dd->first_dyn_alloc_ctxt || rcd->is_vnic) 9332280740fSVishwanathapura, Niranjana rcd->do_interrupt = &handle_receive_interrupt; 934cc9a97eaSNiranjana Vishwanathapura 935d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 936d295dbebSMichael J. Ruhl } 937f48ad614SDennis Dalessandro } 938f48ad614SDennis Dalessandro 939f48ad614SDennis Dalessandro static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd, 940c867caafSMike Marciniszyn struct hfi1_packet *packet, 941f48ad614SDennis Dalessandro struct hfi1_devdata *dd) 942f48ad614SDennis Dalessandro { 943f48ad614SDennis Dalessandro struct work_struct *lsaw = &rcd->ppd->linkstate_active_work; 9449039746cSDon Hiatt u8 etype = rhf_rcv_type(packet->rhf); 9459039746cSDon Hiatt u8 sc = SC15_PACKET; 9469039746cSDon Hiatt 9479039746cSDon Hiatt if (etype == RHF_RCV_TYPE_IB) { 948261a4351SMike Marciniszyn struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd, 949c867caafSMike Marciniszyn packet->rhf_addr); 9509039746cSDon Hiatt sc = hfi1_9B_get_sc5(hdr, packet->rhf); 95172c07e2bSDon Hiatt } else if (etype == RHF_RCV_TYPE_BYPASS) { 95272c07e2bSDon Hiatt struct hfi1_16b_header *hdr = hfi1_get_16B_header( 95372c07e2bSDon Hiatt packet->rcd->dd, 95472c07e2bSDon Hiatt packet->rhf_addr); 95572c07e2bSDon Hiatt sc = hfi1_16B_get_sc(hdr); 9569039746cSDon Hiatt } 9579039746cSDon Hiatt if (sc != SC15_PACKET) { 958bec7c79cSByczkowski, Jakub int hwstate = driver_lstate(rcd->ppd); 959f48ad614SDennis Dalessandro 960bec7c79cSByczkowski, Jakub if (hwstate != IB_PORT_ACTIVE) { 961bec7c79cSByczkowski, Jakub dd_dev_info(dd, 962bec7c79cSByczkowski, Jakub "Unexpected link state %s\n", 963bec7c79cSByczkowski, Jakub opa_lstate_name(hwstate)); 964f48ad614SDennis Dalessandro return 0; 965f48ad614SDennis Dalessandro } 966f48ad614SDennis Dalessandro 96771d47008SSebastian Sanchez queue_work(rcd->ppd->link_wq, lsaw); 968f48ad614SDennis Dalessandro return 1; 969f48ad614SDennis Dalessandro } 970f48ad614SDennis Dalessandro return 0; 971f48ad614SDennis Dalessandro } 972f48ad614SDennis Dalessandro 973f48ad614SDennis Dalessandro /* 974f48ad614SDennis Dalessandro * handle_receive_interrupt - receive a packet 975f48ad614SDennis Dalessandro * @rcd: the context 976f48ad614SDennis Dalessandro * 977f48ad614SDennis Dalessandro * Called from interrupt handler for errors or receive interrupt. 978f48ad614SDennis Dalessandro * This is the slow path interrupt handler. 979f48ad614SDennis Dalessandro */ 980f48ad614SDennis Dalessandro int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread) 981f48ad614SDennis Dalessandro { 982f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 983f48ad614SDennis Dalessandro u32 hdrqtail; 984f48ad614SDennis Dalessandro int needset, last = RCV_PKT_OK; 985f48ad614SDennis Dalessandro struct hfi1_packet packet; 986f48ad614SDennis Dalessandro int skip_pkt = 0; 987f48ad614SDennis Dalessandro 988f48ad614SDennis Dalessandro /* Control context will always use the slow path interrupt handler */ 989f48ad614SDennis Dalessandro needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1; 990f48ad614SDennis Dalessandro 991f48ad614SDennis Dalessandro init_packet(rcd, &packet); 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 (seq != rcd->seq_cnt) { 997f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 998f48ad614SDennis Dalessandro goto bail; 999f48ad614SDennis Dalessandro } 1000f48ad614SDennis Dalessandro hdrqtail = 0; 1001f48ad614SDennis Dalessandro } else { 1002f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 1003f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 1004f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1005f48ad614SDennis Dalessandro goto bail; 1006f48ad614SDennis Dalessandro } 1007f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 1008f48ad614SDennis Dalessandro 1009f48ad614SDennis Dalessandro /* 1010f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 1011f48ad614SDennis Dalessandro * rhf. Drop such packets. 1012f48ad614SDennis Dalessandro */ 1013f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 1014f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1015f48ad614SDennis Dalessandro 1016f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 1017f48ad614SDennis Dalessandro skip_pkt = 1; 1018f48ad614SDennis Dalessandro } 1019f48ad614SDennis Dalessandro } 1020f48ad614SDennis Dalessandro 1021f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 1022f48ad614SDennis Dalessandro 1023f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 1024f48ad614SDennis Dalessandro if (unlikely(dd->do_drop && 1025f48ad614SDennis Dalessandro atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) == 1026f48ad614SDennis Dalessandro DROP_PACKET_ON)) { 1027f48ad614SDennis Dalessandro dd->do_drop = 0; 1028f48ad614SDennis Dalessandro 1029f48ad614SDennis Dalessandro /* On to the next packet */ 1030f48ad614SDennis Dalessandro packet.rhqoff += packet.rsize; 1031f48ad614SDennis Dalessandro packet.rhf_addr = (__le32 *)rcd->rcvhdrq + 1032f48ad614SDennis Dalessandro packet.rhqoff + 1033f48ad614SDennis Dalessandro dd->rhf_offset; 1034f48ad614SDennis Dalessandro packet.rhf = rhf_to_cpu(packet.rhf_addr); 1035f48ad614SDennis Dalessandro 1036f48ad614SDennis Dalessandro } else if (skip_pkt) { 1037f48ad614SDennis Dalessandro last = skip_rcv_packet(&packet, thread); 1038f48ad614SDennis Dalessandro skip_pkt = 0; 1039f48ad614SDennis Dalessandro } else { 1040f48ad614SDennis Dalessandro /* Auto activate link on non-SC15 packet receive */ 1041f48ad614SDennis Dalessandro if (unlikely(rcd->ppd->host_link_state == 1042f48ad614SDennis Dalessandro HLS_UP_ARMED) && 1043c867caafSMike Marciniszyn set_armed_to_active(rcd, &packet, dd)) 1044f48ad614SDennis Dalessandro goto bail; 1045f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 1046f48ad614SDennis Dalessandro } 1047f48ad614SDennis Dalessandro 1048f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 1049f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1050f48ad614SDennis Dalessandro 1051f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 1052f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 1053f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 1054f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1055f48ad614SDennis Dalessandro if (needset) { 1056f48ad614SDennis Dalessandro dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n"); 10572280740fSVishwanathapura, Niranjana set_nodma_rtail(dd, rcd->ctxt); 1058f48ad614SDennis Dalessandro needset = 0; 1059f48ad614SDennis Dalessandro } 1060f48ad614SDennis Dalessandro } else { 1061f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 1062f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1063f48ad614SDennis Dalessandro /* 1064f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 1065f48ad614SDennis Dalessandro * rhf. Drop such packets. 1066f48ad614SDennis Dalessandro */ 1067f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 1068f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1069f48ad614SDennis Dalessandro 1070f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 1071f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 1072f48ad614SDennis Dalessandro if (!last && (seq != rcd->seq_cnt)) 1073f48ad614SDennis Dalessandro skip_pkt = 1; 1074f48ad614SDennis Dalessandro } 1075f48ad614SDennis Dalessandro 1076f48ad614SDennis Dalessandro if (needset) { 1077f48ad614SDennis Dalessandro dd_dev_info(dd, 1078f48ad614SDennis Dalessandro "Switching to DMA_RTAIL\n"); 10792280740fSVishwanathapura, Niranjana set_dma_rtail(dd, rcd->ctxt); 1080f48ad614SDennis Dalessandro needset = 0; 1081f48ad614SDennis Dalessandro } 1082f48ad614SDennis Dalessandro } 1083f48ad614SDennis Dalessandro 1084f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 1085f48ad614SDennis Dalessandro } 1086f48ad614SDennis Dalessandro 1087a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 1088a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 1089f48ad614SDennis Dalessandro 1090f48ad614SDennis Dalessandro bail: 1091f48ad614SDennis Dalessandro /* 1092f48ad614SDennis Dalessandro * Always write head at end, and setup rcv interrupt, even 1093f48ad614SDennis Dalessandro * if no packets were processed. 1094f48ad614SDennis Dalessandro */ 1095f48ad614SDennis Dalessandro finish_packet(&packet); 1096f48ad614SDennis Dalessandro return last; 1097f48ad614SDennis Dalessandro } 1098f48ad614SDennis Dalessandro 1099f48ad614SDennis Dalessandro /* 1100f48ad614SDennis Dalessandro * We may discover in the interrupt that the hardware link state has 1101f48ad614SDennis Dalessandro * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet), 1102f48ad614SDennis Dalessandro * and we need to update the driver's notion of the link state. We cannot 1103f48ad614SDennis Dalessandro * run set_link_state from interrupt context, so we queue this function on 1104f48ad614SDennis Dalessandro * a workqueue. 1105f48ad614SDennis Dalessandro * 1106f48ad614SDennis Dalessandro * We delay the regular interrupt processing until after the state changes 1107f48ad614SDennis Dalessandro * so that the link will be in the correct state by the time any application 1108f48ad614SDennis Dalessandro * we wake up attempts to send a reply to any message it received. 1109f48ad614SDennis Dalessandro * (Subsequent receive interrupts may possibly force the wakeup before we 1110f48ad614SDennis Dalessandro * update the link state.) 1111f48ad614SDennis Dalessandro * 1112f48ad614SDennis Dalessandro * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes 1113f48ad614SDennis Dalessandro * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues, 1114f48ad614SDennis Dalessandro * so we're safe from use-after-free of the rcd. 1115f48ad614SDennis Dalessandro */ 1116f48ad614SDennis Dalessandro void receive_interrupt_work(struct work_struct *work) 1117f48ad614SDennis Dalessandro { 1118f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata, 1119f48ad614SDennis Dalessandro linkstate_active_work); 1120f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1121d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 1122e6f7622dSMichael J. Ruhl u16 i; 1123f48ad614SDennis Dalessandro 1124f48ad614SDennis Dalessandro /* Received non-SC15 packet implies neighbor_normal */ 1125f48ad614SDennis Dalessandro ppd->neighbor_normal = 1; 1126f48ad614SDennis Dalessandro set_link_state(ppd, HLS_UP_ACTIVE); 1127f48ad614SDennis Dalessandro 1128f48ad614SDennis Dalessandro /* 11292280740fSVishwanathapura, Niranjana * Interrupt all statically allocated kernel contexts that could 11302280740fSVishwanathapura, Niranjana * have had an interrupt during auto activation. 1131f48ad614SDennis Dalessandro */ 1132d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) { 1133d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 1134d295dbebSMichael J. Ruhl if (rcd) 1135d295dbebSMichael J. Ruhl force_recv_intr(rcd); 1136d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 1137d295dbebSMichael J. Ruhl } 1138f48ad614SDennis Dalessandro } 1139f48ad614SDennis Dalessandro 1140f48ad614SDennis Dalessandro /* 1141f48ad614SDennis Dalessandro * Convert a given MTU size to the on-wire MAD packet enumeration. 1142f48ad614SDennis Dalessandro * Return -1 if the size is invalid. 1143f48ad614SDennis Dalessandro */ 1144f48ad614SDennis Dalessandro int mtu_to_enum(u32 mtu, int default_if_bad) 1145f48ad614SDennis Dalessandro { 1146f48ad614SDennis Dalessandro switch (mtu) { 1147f48ad614SDennis Dalessandro case 0: return OPA_MTU_0; 1148f48ad614SDennis Dalessandro case 256: return OPA_MTU_256; 1149f48ad614SDennis Dalessandro case 512: return OPA_MTU_512; 1150f48ad614SDennis Dalessandro case 1024: return OPA_MTU_1024; 1151f48ad614SDennis Dalessandro case 2048: return OPA_MTU_2048; 1152f48ad614SDennis Dalessandro case 4096: return OPA_MTU_4096; 1153f48ad614SDennis Dalessandro case 8192: return OPA_MTU_8192; 1154f48ad614SDennis Dalessandro case 10240: return OPA_MTU_10240; 1155f48ad614SDennis Dalessandro } 1156f48ad614SDennis Dalessandro return default_if_bad; 1157f48ad614SDennis Dalessandro } 1158f48ad614SDennis Dalessandro 1159f48ad614SDennis Dalessandro u16 enum_to_mtu(int mtu) 1160f48ad614SDennis Dalessandro { 1161f48ad614SDennis Dalessandro switch (mtu) { 1162f48ad614SDennis Dalessandro case OPA_MTU_0: return 0; 1163f48ad614SDennis Dalessandro case OPA_MTU_256: return 256; 1164f48ad614SDennis Dalessandro case OPA_MTU_512: return 512; 1165f48ad614SDennis Dalessandro case OPA_MTU_1024: return 1024; 1166f48ad614SDennis Dalessandro case OPA_MTU_2048: return 2048; 1167f48ad614SDennis Dalessandro case OPA_MTU_4096: return 4096; 1168f48ad614SDennis Dalessandro case OPA_MTU_8192: return 8192; 1169f48ad614SDennis Dalessandro case OPA_MTU_10240: return 10240; 1170f48ad614SDennis Dalessandro default: return 0xffff; 1171f48ad614SDennis Dalessandro } 1172f48ad614SDennis Dalessandro } 1173f48ad614SDennis Dalessandro 1174f48ad614SDennis Dalessandro /* 1175f48ad614SDennis Dalessandro * set_mtu - set the MTU 1176f48ad614SDennis Dalessandro * @ppd: the per port data 1177f48ad614SDennis Dalessandro * 1178f48ad614SDennis Dalessandro * We can handle "any" incoming size, the issue here is whether we 1179f48ad614SDennis Dalessandro * need to restrict our outgoing size. We do not deal with what happens 1180f48ad614SDennis Dalessandro * to programs that are already running when the size changes. 1181f48ad614SDennis Dalessandro */ 1182f48ad614SDennis Dalessandro int set_mtu(struct hfi1_pportdata *ppd) 1183f48ad614SDennis Dalessandro { 1184f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1185f48ad614SDennis Dalessandro int i, drain, ret = 0, is_up = 0; 1186f48ad614SDennis Dalessandro 1187f48ad614SDennis Dalessandro ppd->ibmtu = 0; 1188f48ad614SDennis Dalessandro for (i = 0; i < ppd->vls_supported; i++) 1189f48ad614SDennis Dalessandro if (ppd->ibmtu < dd->vld[i].mtu) 1190f48ad614SDennis Dalessandro ppd->ibmtu = dd->vld[i].mtu; 1191f48ad614SDennis Dalessandro ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd); 1192f48ad614SDennis Dalessandro 1193f48ad614SDennis Dalessandro mutex_lock(&ppd->hls_lock); 1194f48ad614SDennis Dalessandro if (ppd->host_link_state == HLS_UP_INIT || 1195f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ARMED || 1196f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ACTIVE) 1197f48ad614SDennis Dalessandro is_up = 1; 1198f48ad614SDennis Dalessandro 1199f48ad614SDennis Dalessandro drain = !is_ax(dd) && is_up; 1200f48ad614SDennis Dalessandro 1201f48ad614SDennis Dalessandro if (drain) 1202f48ad614SDennis Dalessandro /* 1203f48ad614SDennis Dalessandro * MTU is specified per-VL. To ensure that no packet gets 1204f48ad614SDennis Dalessandro * stuck (due, e.g., to the MTU for the packet's VL being 1205f48ad614SDennis Dalessandro * reduced), empty the per-VL FIFOs before adjusting MTU. 1206f48ad614SDennis Dalessandro */ 1207f48ad614SDennis Dalessandro ret = stop_drain_data_vls(dd); 1208f48ad614SDennis Dalessandro 1209f48ad614SDennis Dalessandro if (ret) { 1210f48ad614SDennis Dalessandro dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n", 1211f48ad614SDennis Dalessandro __func__); 1212f48ad614SDennis Dalessandro goto err; 1213f48ad614SDennis Dalessandro } 1214f48ad614SDennis Dalessandro 1215f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0); 1216f48ad614SDennis Dalessandro 1217f48ad614SDennis Dalessandro if (drain) 1218f48ad614SDennis Dalessandro open_fill_data_vls(dd); /* reopen all VLs */ 1219f48ad614SDennis Dalessandro 1220f48ad614SDennis Dalessandro err: 1221f48ad614SDennis Dalessandro mutex_unlock(&ppd->hls_lock); 1222f48ad614SDennis Dalessandro 1223f48ad614SDennis Dalessandro return ret; 1224f48ad614SDennis Dalessandro } 1225f48ad614SDennis Dalessandro 1226f48ad614SDennis Dalessandro int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc) 1227f48ad614SDennis Dalessandro { 1228f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1229f48ad614SDennis Dalessandro 1230f48ad614SDennis Dalessandro ppd->lid = lid; 1231f48ad614SDennis Dalessandro ppd->lmc = lmc; 1232f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0); 1233f48ad614SDennis Dalessandro 1234f48ad614SDennis Dalessandro dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid); 1235f48ad614SDennis Dalessandro 1236f48ad614SDennis Dalessandro return 0; 1237f48ad614SDennis Dalessandro } 1238f48ad614SDennis Dalessandro 1239f48ad614SDennis Dalessandro void shutdown_led_override(struct hfi1_pportdata *ppd) 1240f48ad614SDennis Dalessandro { 1241f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1242f48ad614SDennis Dalessandro 1243f48ad614SDennis Dalessandro /* 1244f48ad614SDennis Dalessandro * This pairs with the memory barrier in hfi1_start_led_override to 1245f48ad614SDennis Dalessandro * ensure that we read the correct state of LED beaconing represented 1246f48ad614SDennis Dalessandro * by led_override_timer_active 1247f48ad614SDennis Dalessandro */ 1248f48ad614SDennis Dalessandro smp_rmb(); 1249f48ad614SDennis Dalessandro if (atomic_read(&ppd->led_override_timer_active)) { 1250f48ad614SDennis Dalessandro del_timer_sync(&ppd->led_override_timer); 1251f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 0); 1252f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1253f48ad614SDennis Dalessandro smp_wmb(); 1254f48ad614SDennis Dalessandro } 1255f48ad614SDennis Dalessandro 1256f48ad614SDennis Dalessandro /* Hand control of the LED to the DC for normal operation */ 1257f48ad614SDennis Dalessandro write_csr(dd, DCC_CFG_LED_CNTRL, 0); 1258f48ad614SDennis Dalessandro } 1259f48ad614SDennis Dalessandro 12608064135eSKees Cook static void run_led_override(struct timer_list *t) 1261f48ad614SDennis Dalessandro { 12628064135eSKees Cook struct hfi1_pportdata *ppd = from_timer(ppd, t, led_override_timer); 1263f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1264f48ad614SDennis Dalessandro unsigned long timeout; 1265f48ad614SDennis Dalessandro int phase_idx; 1266f48ad614SDennis Dalessandro 1267f48ad614SDennis Dalessandro if (!(dd->flags & HFI1_INITTED)) 1268f48ad614SDennis Dalessandro return; 1269f48ad614SDennis Dalessandro 1270f48ad614SDennis Dalessandro phase_idx = ppd->led_override_phase & 1; 1271f48ad614SDennis Dalessandro 1272f48ad614SDennis Dalessandro setextled(dd, phase_idx); 1273f48ad614SDennis Dalessandro 1274f48ad614SDennis Dalessandro timeout = ppd->led_override_vals[phase_idx]; 1275f48ad614SDennis Dalessandro 1276f48ad614SDennis Dalessandro /* Set up for next phase */ 1277f48ad614SDennis Dalessandro ppd->led_override_phase = !ppd->led_override_phase; 1278f48ad614SDennis Dalessandro 1279f48ad614SDennis Dalessandro mod_timer(&ppd->led_override_timer, jiffies + timeout); 1280f48ad614SDennis Dalessandro } 1281f48ad614SDennis Dalessandro 1282f48ad614SDennis Dalessandro /* 1283f48ad614SDennis Dalessandro * To have the LED blink in a particular pattern, provide timeon and timeoff 1284f48ad614SDennis Dalessandro * in milliseconds. 1285f48ad614SDennis Dalessandro * To turn off custom blinking and return to normal operation, use 1286f48ad614SDennis Dalessandro * shutdown_led_override() 1287f48ad614SDennis Dalessandro */ 1288f48ad614SDennis Dalessandro void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon, 1289f48ad614SDennis Dalessandro unsigned int timeoff) 1290f48ad614SDennis Dalessandro { 1291f48ad614SDennis Dalessandro if (!(ppd->dd->flags & HFI1_INITTED)) 1292f48ad614SDennis Dalessandro return; 1293f48ad614SDennis Dalessandro 1294f48ad614SDennis Dalessandro /* Convert to jiffies for direct use in timer */ 1295f48ad614SDennis Dalessandro ppd->led_override_vals[0] = msecs_to_jiffies(timeoff); 1296f48ad614SDennis Dalessandro ppd->led_override_vals[1] = msecs_to_jiffies(timeon); 1297f48ad614SDennis Dalessandro 1298f48ad614SDennis Dalessandro /* Arbitrarily start from LED on phase */ 1299f48ad614SDennis Dalessandro ppd->led_override_phase = 1; 1300f48ad614SDennis Dalessandro 1301f48ad614SDennis Dalessandro /* 1302f48ad614SDennis Dalessandro * If the timer has not already been started, do so. Use a "quick" 1303f48ad614SDennis Dalessandro * timeout so the handler will be called soon to look at our request. 1304f48ad614SDennis Dalessandro */ 1305f48ad614SDennis Dalessandro if (!timer_pending(&ppd->led_override_timer)) { 13068064135eSKees Cook timer_setup(&ppd->led_override_timer, run_led_override, 0); 1307f48ad614SDennis Dalessandro ppd->led_override_timer.expires = jiffies + 1; 1308f48ad614SDennis Dalessandro add_timer(&ppd->led_override_timer); 1309f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 1); 1310f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1311f48ad614SDennis Dalessandro smp_wmb(); 1312f48ad614SDennis Dalessandro } 1313f48ad614SDennis Dalessandro } 1314f48ad614SDennis Dalessandro 1315f48ad614SDennis Dalessandro /** 1316f48ad614SDennis Dalessandro * hfi1_reset_device - reset the chip if possible 1317f48ad614SDennis Dalessandro * @unit: the device to reset 1318f48ad614SDennis Dalessandro * 1319f48ad614SDennis Dalessandro * Whether or not reset is successful, we attempt to re-initialize the chip 1320f48ad614SDennis Dalessandro * (that is, much like a driver unload/reload). We clear the INITTED flag 1321f48ad614SDennis Dalessandro * so that the various entry points will fail until we reinitialize. For 1322f48ad614SDennis Dalessandro * now, we only allow this if no user contexts are open that use chip resources 1323f48ad614SDennis Dalessandro */ 1324f48ad614SDennis Dalessandro int hfi1_reset_device(int unit) 1325f48ad614SDennis Dalessandro { 1326e6f7622dSMichael J. Ruhl int ret; 1327f48ad614SDennis Dalessandro struct hfi1_devdata *dd = hfi1_lookup(unit); 1328f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 1329f48ad614SDennis Dalessandro int pidx; 1330f48ad614SDennis Dalessandro 1331f48ad614SDennis Dalessandro if (!dd) { 1332f48ad614SDennis Dalessandro ret = -ENODEV; 1333f48ad614SDennis Dalessandro goto bail; 1334f48ad614SDennis Dalessandro } 1335f48ad614SDennis Dalessandro 1336f48ad614SDennis Dalessandro dd_dev_info(dd, "Reset on unit %u requested\n", unit); 1337f48ad614SDennis Dalessandro 1338cb51c5d2SMike Marciniszyn if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) { 1339f48ad614SDennis Dalessandro dd_dev_info(dd, 1340f48ad614SDennis Dalessandro "Invalid unit number %u or not initialized or not present\n", 1341f48ad614SDennis Dalessandro unit); 1342f48ad614SDennis Dalessandro ret = -ENXIO; 1343f48ad614SDennis Dalessandro goto bail; 1344f48ad614SDennis Dalessandro } 1345f48ad614SDennis Dalessandro 1346d295dbebSMichael J. Ruhl /* If there are any user/vnic contexts, we cannot reset */ 1347d295dbebSMichael J. Ruhl mutex_lock(&hfi1_mutex); 1348f48ad614SDennis Dalessandro if (dd->rcd) 1349d295dbebSMichael J. Ruhl if (hfi1_stats.sps_ctxts) { 1350d295dbebSMichael J. Ruhl mutex_unlock(&hfi1_mutex); 1351f48ad614SDennis Dalessandro ret = -EBUSY; 1352f48ad614SDennis Dalessandro goto bail; 1353f48ad614SDennis Dalessandro } 1354d295dbebSMichael J. Ruhl mutex_unlock(&hfi1_mutex); 1355f48ad614SDennis Dalessandro 1356f48ad614SDennis Dalessandro for (pidx = 0; pidx < dd->num_pports; ++pidx) { 1357f48ad614SDennis Dalessandro ppd = dd->pport + pidx; 1358f48ad614SDennis Dalessandro 1359f48ad614SDennis Dalessandro shutdown_led_override(ppd); 1360f48ad614SDennis Dalessandro } 1361f48ad614SDennis Dalessandro if (dd->flags & HFI1_HAS_SEND_DMA) 1362f48ad614SDennis Dalessandro sdma_exit(dd); 1363f48ad614SDennis Dalessandro 1364f48ad614SDennis Dalessandro hfi1_reset_cpu_counters(dd); 1365f48ad614SDennis Dalessandro 1366f48ad614SDennis Dalessandro ret = hfi1_init(dd, 1); 1367f48ad614SDennis Dalessandro 1368f48ad614SDennis Dalessandro if (ret) 1369f48ad614SDennis Dalessandro dd_dev_err(dd, 1370f48ad614SDennis Dalessandro "Reinitialize unit %u after reset failed with %d\n", 1371f48ad614SDennis Dalessandro unit, ret); 1372f48ad614SDennis Dalessandro else 1373f48ad614SDennis Dalessandro dd_dev_info(dd, "Reinitialized unit %u after resetting\n", 1374f48ad614SDennis Dalessandro unit); 1375f48ad614SDennis Dalessandro 1376f48ad614SDennis Dalessandro bail: 1377f48ad614SDennis Dalessandro return ret; 1378f48ad614SDennis Dalessandro } 1379f48ad614SDennis Dalessandro 13809039746cSDon Hiatt static inline void hfi1_setup_ib_header(struct hfi1_packet *packet) 13819039746cSDon Hiatt { 13829039746cSDon Hiatt packet->hdr = (struct hfi1_ib_message_header *) 13839039746cSDon Hiatt hfi1_get_msgheader(packet->rcd->dd, 13849039746cSDon Hiatt packet->rhf_addr); 13859039746cSDon Hiatt packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; 13869039746cSDon Hiatt } 13879039746cSDon Hiatt 13885786adf3SDon Hiatt static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet) 13895786adf3SDon Hiatt { 13905786adf3SDon Hiatt struct hfi1_pportdata *ppd = packet->rcd->ppd; 13915786adf3SDon Hiatt 13925786adf3SDon Hiatt /* slid and dlid cannot be 0 */ 13935786adf3SDon Hiatt if ((!packet->slid) || (!packet->dlid)) 13945786adf3SDon Hiatt return -EINVAL; 13955786adf3SDon Hiatt 13965786adf3SDon Hiatt /* Compare port lid with incoming packet dlid */ 13975786adf3SDon Hiatt if ((!(hfi1_is_16B_mcast(packet->dlid))) && 13985786adf3SDon Hiatt (packet->dlid != 13995786adf3SDon Hiatt opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) { 14005786adf3SDon Hiatt if (packet->dlid != ppd->lid) 14015786adf3SDon Hiatt return -EINVAL; 14025786adf3SDon Hiatt } 14035786adf3SDon Hiatt 14045786adf3SDon Hiatt /* No multicast packets with SC15 */ 14055786adf3SDon Hiatt if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF)) 14065786adf3SDon Hiatt return -EINVAL; 14075786adf3SDon Hiatt 14085786adf3SDon Hiatt /* Packets with permissive DLID always on SC15 */ 14095786adf3SDon Hiatt if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 14105786adf3SDon Hiatt 16B)) && 14115786adf3SDon Hiatt (packet->sc != 0xF)) 14125786adf3SDon Hiatt return -EINVAL; 14135786adf3SDon Hiatt 14145786adf3SDon Hiatt return 0; 14155786adf3SDon Hiatt } 14165786adf3SDon Hiatt 14179039746cSDon Hiatt static int hfi1_setup_9B_packet(struct hfi1_packet *packet) 14189039746cSDon Hiatt { 14199039746cSDon Hiatt struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); 14209039746cSDon Hiatt struct ib_header *hdr; 14219039746cSDon Hiatt u8 lnh; 14229039746cSDon Hiatt 14239039746cSDon Hiatt hfi1_setup_ib_header(packet); 14249039746cSDon Hiatt hdr = packet->hdr; 14259039746cSDon Hiatt 14269039746cSDon Hiatt lnh = ib_get_lnh(hdr); 14279039746cSDon Hiatt if (lnh == HFI1_LRH_BTH) { 14289039746cSDon Hiatt packet->ohdr = &hdr->u.oth; 14299039746cSDon Hiatt packet->grh = NULL; 14309039746cSDon Hiatt } else if (lnh == HFI1_LRH_GRH) { 14319039746cSDon Hiatt u32 vtf; 14329039746cSDon Hiatt 14339039746cSDon Hiatt packet->ohdr = &hdr->u.l.oth; 14349039746cSDon Hiatt packet->grh = &hdr->u.l.grh; 14359039746cSDon Hiatt if (packet->grh->next_hdr != IB_GRH_NEXT_HDR) 14369039746cSDon Hiatt goto drop; 14379039746cSDon Hiatt vtf = be32_to_cpu(packet->grh->version_tclass_flow); 14389039746cSDon Hiatt if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 14399039746cSDon Hiatt goto drop; 14409039746cSDon Hiatt } else { 14419039746cSDon Hiatt goto drop; 14429039746cSDon Hiatt } 14439039746cSDon Hiatt 14449039746cSDon Hiatt /* Query commonly used fields from packet header */ 144572c07e2bSDon Hiatt packet->payload = packet->ebuf; 14469039746cSDon Hiatt packet->opcode = ib_bth_get_opcode(packet->ohdr); 14479039746cSDon Hiatt packet->slid = ib_get_slid(hdr); 14489039746cSDon Hiatt packet->dlid = ib_get_dlid(hdr); 144972c07e2bSDon Hiatt if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) && 145072c07e2bSDon Hiatt (packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE)))) 145172c07e2bSDon Hiatt packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) - 145272c07e2bSDon Hiatt be16_to_cpu(IB_MULTICAST_LID_BASE); 14539039746cSDon Hiatt packet->sl = ib_get_sl(hdr); 14549039746cSDon Hiatt packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf); 14559039746cSDon Hiatt packet->pad = ib_bth_get_pad(packet->ohdr); 14569039746cSDon Hiatt packet->extra_byte = 0; 14579039746cSDon Hiatt packet->fecn = ib_bth_get_fecn(packet->ohdr); 14589039746cSDon Hiatt packet->becn = ib_bth_get_becn(packet->ohdr); 14599039746cSDon Hiatt 14609039746cSDon Hiatt return 0; 14619039746cSDon Hiatt drop: 14629039746cSDon Hiatt ibp->rvp.n_pkt_drops++; 14639039746cSDon Hiatt return -EINVAL; 14649039746cSDon Hiatt } 14659039746cSDon Hiatt 146672c07e2bSDon Hiatt static int hfi1_setup_bypass_packet(struct hfi1_packet *packet) 146772c07e2bSDon Hiatt { 146872c07e2bSDon Hiatt /* 146972c07e2bSDon Hiatt * Bypass packets have a different header/payload split 147072c07e2bSDon Hiatt * compared to an IB packet. 147172c07e2bSDon Hiatt * Current split is set such that 16 bytes of the actual 147272c07e2bSDon Hiatt * header is in the header buffer and the remining is in 147372c07e2bSDon Hiatt * the eager buffer. We chose 16 since hfi1 driver only 147472c07e2bSDon Hiatt * supports 16B bypass packets and we will be able to 147572c07e2bSDon Hiatt * receive the entire LRH with such a split. 147672c07e2bSDon Hiatt */ 147772c07e2bSDon Hiatt 147872c07e2bSDon Hiatt struct hfi1_ctxtdata *rcd = packet->rcd; 147972c07e2bSDon Hiatt struct hfi1_pportdata *ppd = rcd->ppd; 148072c07e2bSDon Hiatt struct hfi1_ibport *ibp = &ppd->ibport_data; 148172c07e2bSDon Hiatt u8 l4; 148272c07e2bSDon Hiatt u8 grh_len; 148372c07e2bSDon Hiatt 148472c07e2bSDon Hiatt packet->hdr = (struct hfi1_16b_header *) 148572c07e2bSDon Hiatt hfi1_get_16B_header(packet->rcd->dd, 148672c07e2bSDon Hiatt packet->rhf_addr); 148772c07e2bSDon Hiatt packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; 148872c07e2bSDon Hiatt 148972c07e2bSDon Hiatt l4 = hfi1_16B_get_l4(packet->hdr); 149072c07e2bSDon Hiatt if (l4 == OPA_16B_L4_IB_LOCAL) { 149172c07e2bSDon Hiatt grh_len = 0; 149272c07e2bSDon Hiatt packet->ohdr = packet->ebuf; 149372c07e2bSDon Hiatt packet->grh = NULL; 149472c07e2bSDon Hiatt } else if (l4 == OPA_16B_L4_IB_GLOBAL) { 149572c07e2bSDon Hiatt u32 vtf; 149672c07e2bSDon Hiatt 149772c07e2bSDon Hiatt grh_len = sizeof(struct ib_grh); 149872c07e2bSDon Hiatt packet->ohdr = packet->ebuf + grh_len; 149972c07e2bSDon Hiatt packet->grh = packet->ebuf; 150072c07e2bSDon Hiatt if (packet->grh->next_hdr != IB_GRH_NEXT_HDR) 150172c07e2bSDon Hiatt goto drop; 150272c07e2bSDon Hiatt vtf = be32_to_cpu(packet->grh->version_tclass_flow); 150372c07e2bSDon Hiatt if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 150472c07e2bSDon Hiatt goto drop; 150572c07e2bSDon Hiatt } else { 150672c07e2bSDon Hiatt goto drop; 150772c07e2bSDon Hiatt } 150872c07e2bSDon Hiatt 150972c07e2bSDon Hiatt /* Query commonly used fields from packet header */ 151072c07e2bSDon Hiatt packet->opcode = ib_bth_get_opcode(packet->ohdr); 151172c07e2bSDon Hiatt packet->hlen = hdr_len_by_opcode[packet->opcode] + 8 + grh_len; 151272c07e2bSDon Hiatt packet->payload = packet->ebuf + packet->hlen - (4 * sizeof(u32)); 151372c07e2bSDon Hiatt packet->slid = hfi1_16B_get_slid(packet->hdr); 151472c07e2bSDon Hiatt packet->dlid = hfi1_16B_get_dlid(packet->hdr); 151572c07e2bSDon Hiatt if (unlikely(hfi1_is_16B_mcast(packet->dlid))) 151672c07e2bSDon Hiatt packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) - 151772c07e2bSDon Hiatt opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR), 151872c07e2bSDon Hiatt 16B); 151972c07e2bSDon Hiatt packet->sc = hfi1_16B_get_sc(packet->hdr); 152072c07e2bSDon Hiatt packet->sl = ibp->sc_to_sl[packet->sc]; 152172c07e2bSDon Hiatt packet->pad = hfi1_16B_bth_get_pad(packet->ohdr); 152272c07e2bSDon Hiatt packet->extra_byte = SIZE_OF_LT; 152372c07e2bSDon Hiatt packet->fecn = hfi1_16B_get_fecn(packet->hdr); 152472c07e2bSDon Hiatt packet->becn = hfi1_16B_get_becn(packet->hdr); 152572c07e2bSDon Hiatt 15265786adf3SDon Hiatt if (hfi1_bypass_ingress_pkt_check(packet)) 15275786adf3SDon Hiatt goto drop; 15285786adf3SDon Hiatt 152972c07e2bSDon Hiatt return 0; 153072c07e2bSDon Hiatt drop: 153172c07e2bSDon Hiatt hfi1_cdbg(PKT, "%s: packet dropped\n", __func__); 153272c07e2bSDon Hiatt ibp->rvp.n_pkt_drops++; 153372c07e2bSDon Hiatt return -EINVAL; 153472c07e2bSDon Hiatt } 153572c07e2bSDon Hiatt 1536f48ad614SDennis Dalessandro void handle_eflags(struct hfi1_packet *packet) 1537f48ad614SDennis Dalessandro { 1538f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 1539f48ad614SDennis Dalessandro u32 rte = rhf_rcv_type_err(packet->rhf); 1540f48ad614SDennis Dalessandro 1541f48ad614SDennis Dalessandro rcv_hdrerr(rcd, rcd->ppd, packet); 1542f48ad614SDennis Dalessandro if (rhf_err_flags(packet->rhf)) 1543f48ad614SDennis Dalessandro dd_dev_err(rcd->dd, 1544f48ad614SDennis Dalessandro "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n", 1545f48ad614SDennis Dalessandro rcd->ctxt, packet->rhf, 1546f48ad614SDennis Dalessandro packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "", 1547f48ad614SDennis Dalessandro packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "", 1548f48ad614SDennis Dalessandro packet->rhf & RHF_DC_ERR ? "dc " : "", 1549f48ad614SDennis Dalessandro packet->rhf & RHF_TID_ERR ? "tid " : "", 1550f48ad614SDennis Dalessandro packet->rhf & RHF_LEN_ERR ? "len " : "", 1551f48ad614SDennis Dalessandro packet->rhf & RHF_ECC_ERR ? "ecc " : "", 1552f48ad614SDennis Dalessandro packet->rhf & RHF_VCRC_ERR ? "vcrc " : "", 1553f48ad614SDennis Dalessandro packet->rhf & RHF_ICRC_ERR ? "icrc " : "", 1554f48ad614SDennis Dalessandro rte); 1555f48ad614SDennis Dalessandro } 1556f48ad614SDennis Dalessandro 1557f48ad614SDennis Dalessandro /* 1558f48ad614SDennis Dalessandro * The following functions are called by the interrupt handler. They are type 1559f48ad614SDennis Dalessandro * specific handlers for each packet type. 1560f48ad614SDennis Dalessandro */ 1561f48ad614SDennis Dalessandro int process_receive_ib(struct hfi1_packet *packet) 1562f48ad614SDennis Dalessandro { 15630181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 15640181ce31SDon Hiatt return RHF_RCV_CONTINUE; 15650181ce31SDon Hiatt 15669039746cSDon Hiatt if (hfi1_setup_9B_packet(packet)) 15679039746cSDon Hiatt return RHF_RCV_CONTINUE; 15689039746cSDon Hiatt 1569f48ad614SDennis Dalessandro trace_hfi1_rcvhdr(packet->rcd->ppd->dd, 1570f48ad614SDennis Dalessandro packet->rcd->ctxt, 1571f48ad614SDennis Dalessandro rhf_err_flags(packet->rhf), 1572f48ad614SDennis Dalessandro RHF_RCV_TYPE_IB, 1573f48ad614SDennis Dalessandro packet->hlen, 1574f48ad614SDennis Dalessandro packet->tlen, 1575f48ad614SDennis Dalessandro packet->updegr, 1576f48ad614SDennis Dalessandro rhf_egr_index(packet->rhf)); 1577f48ad614SDennis Dalessandro 1578243d9f43SDon Hiatt if (unlikely( 1579243d9f43SDon Hiatt (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1580243d9f43SDon Hiatt (packet->rhf & RHF_DC_ERR)))) 1581243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1582243d9f43SDon Hiatt 1583f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) { 1584f48ad614SDennis Dalessandro handle_eflags(packet); 1585f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1586f48ad614SDennis Dalessandro } 1587f48ad614SDennis Dalessandro 1588f48ad614SDennis Dalessandro hfi1_ib_rcv(packet); 1589f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1590f48ad614SDennis Dalessandro } 1591f48ad614SDennis Dalessandro 1592d4829ea6SVishwanathapura, Niranjana static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet) 1593d4829ea6SVishwanathapura, Niranjana { 1594d4829ea6SVishwanathapura, Niranjana /* Packet received in VNIC context via RSM */ 1595d4829ea6SVishwanathapura, Niranjana if (packet->rcd->is_vnic) 1596d4829ea6SVishwanathapura, Niranjana return true; 1597d4829ea6SVishwanathapura, Niranjana 159872c07e2bSDon Hiatt if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) && 159972c07e2bSDon Hiatt (hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR)) 1600d4829ea6SVishwanathapura, Niranjana return true; 1601d4829ea6SVishwanathapura, Niranjana 1602d4829ea6SVishwanathapura, Niranjana return false; 1603d4829ea6SVishwanathapura, Niranjana } 1604d4829ea6SVishwanathapura, Niranjana 1605f48ad614SDennis Dalessandro int process_receive_bypass(struct hfi1_packet *packet) 1606f48ad614SDennis Dalessandro { 1607505efe3eSJakub Pawlak struct hfi1_devdata *dd = packet->rcd->dd; 1608505efe3eSJakub Pawlak 160972c07e2bSDon Hiatt if (hfi1_is_vnic_packet(packet)) { 1610d4829ea6SVishwanathapura, Niranjana hfi1_vnic_bypass_rcv(packet); 1611d4829ea6SVishwanathapura, Niranjana return RHF_RCV_CONTINUE; 1612d4829ea6SVishwanathapura, Niranjana } 1613f48ad614SDennis Dalessandro 161472c07e2bSDon Hiatt if (hfi1_setup_bypass_packet(packet)) 161572c07e2bSDon Hiatt return RHF_RCV_CONTINUE; 161672c07e2bSDon Hiatt 161772c07e2bSDon Hiatt if (unlikely(rhf_err_flags(packet->rhf))) { 161872c07e2bSDon Hiatt handle_eflags(packet); 161972c07e2bSDon Hiatt return RHF_RCV_CONTINUE; 162072c07e2bSDon Hiatt } 162172c07e2bSDon Hiatt 162272c07e2bSDon Hiatt if (hfi1_16B_get_l2(packet->hdr) == 0x2) { 162372c07e2bSDon Hiatt hfi1_16B_rcv(packet); 162472c07e2bSDon Hiatt } else { 162572c07e2bSDon Hiatt dd_dev_err(dd, 162672c07e2bSDon Hiatt "Bypass packets other than 16B are not supported in normal operation. Dropping\n"); 1627505efe3eSJakub Pawlak incr_cntr64(&dd->sw_rcv_bypass_packet_errors); 162872c07e2bSDon Hiatt if (!(dd->err_info_rcvport.status_and_code & 162972c07e2bSDon Hiatt OPA_EI_STATUS_SMASK)) { 1630505efe3eSJakub Pawlak u64 *flits = packet->ebuf; 1631505efe3eSJakub Pawlak 1632505efe3eSJakub Pawlak if (flits && !(packet->rhf & RHF_LEN_ERR)) { 1633505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit1 = flits[0]; 1634505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit2 = 163572c07e2bSDon Hiatt packet->tlen > sizeof(flits[0]) ? 163672c07e2bSDon Hiatt flits[1] : 0; 1637505efe3eSJakub Pawlak } 1638505efe3eSJakub Pawlak dd->err_info_rcvport.status_and_code |= 1639505efe3eSJakub Pawlak (OPA_EI_STATUS_SMASK | BAD_L2_ERR); 1640505efe3eSJakub Pawlak } 164172c07e2bSDon Hiatt } 1642f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1643f48ad614SDennis Dalessandro } 1644f48ad614SDennis Dalessandro 1645f48ad614SDennis Dalessandro int process_receive_error(struct hfi1_packet *packet) 1646f48ad614SDennis Dalessandro { 1647243d9f43SDon Hiatt /* KHdrHCRCErr -- KDETH packet with a bad HCRC */ 1648243d9f43SDon Hiatt if (unlikely( 1649243d9f43SDon Hiatt hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1650243d9f43SDon Hiatt rhf_rcv_type_err(packet->rhf) == 3)) 1651243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1652243d9f43SDon Hiatt 16539039746cSDon Hiatt hfi1_setup_ib_header(packet); 1654f48ad614SDennis Dalessandro handle_eflags(packet); 1655f48ad614SDennis Dalessandro 1656f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1657f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1658f48ad614SDennis Dalessandro "Unhandled error packet received. Dropping.\n"); 1659f48ad614SDennis Dalessandro 1660f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1661f48ad614SDennis Dalessandro } 1662f48ad614SDennis Dalessandro 1663f48ad614SDennis Dalessandro int kdeth_process_expected(struct hfi1_packet *packet) 1664f48ad614SDennis Dalessandro { 16650181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 16660181ce31SDon Hiatt return RHF_RCV_CONTINUE; 16679039746cSDon Hiatt 16689039746cSDon Hiatt hfi1_setup_ib_header(packet); 1669f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1670f48ad614SDennis Dalessandro handle_eflags(packet); 1671f48ad614SDennis Dalessandro 1672f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1673f48ad614SDennis Dalessandro "Unhandled expected packet received. Dropping.\n"); 1674f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1675f48ad614SDennis Dalessandro } 1676f48ad614SDennis Dalessandro 1677f48ad614SDennis Dalessandro int kdeth_process_eager(struct hfi1_packet *packet) 1678f48ad614SDennis Dalessandro { 16799039746cSDon Hiatt hfi1_setup_ib_header(packet); 1680f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1681f48ad614SDennis Dalessandro handle_eflags(packet); 16820181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 16830181ce31SDon Hiatt return RHF_RCV_CONTINUE; 1684f48ad614SDennis Dalessandro 1685f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1686f48ad614SDennis Dalessandro "Unhandled eager packet received. Dropping.\n"); 1687f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1688f48ad614SDennis Dalessandro } 1689f48ad614SDennis Dalessandro 1690f48ad614SDennis Dalessandro int process_receive_invalid(struct hfi1_packet *packet) 1691f48ad614SDennis Dalessandro { 1692f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n", 1693f48ad614SDennis Dalessandro rhf_rcv_type(packet->rhf)); 1694f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1695f48ad614SDennis Dalessandro } 1696bf808b50SKaike Wan 1697bf808b50SKaike Wan void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd) 1698bf808b50SKaike Wan { 1699bf808b50SKaike Wan struct hfi1_packet packet; 1700bf808b50SKaike Wan struct ps_mdata mdata; 1701bf808b50SKaike Wan 1702bf808b50SKaike Wan seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s head %llu tail %llu\n", 1703bf808b50SKaike Wan rcd->ctxt, rcd->rcvhdrq_cnt, rcd->rcvhdrqentsize, 1704bf808b50SKaike Wan HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) ? 1705bf808b50SKaike Wan "dma_rtail" : "nodma_rtail", 1706bf808b50SKaike Wan read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) & 1707bf808b50SKaike Wan RCV_HDR_HEAD_HEAD_MASK, 1708bf808b50SKaike Wan read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL)); 1709bf808b50SKaike Wan 1710bf808b50SKaike Wan init_packet(rcd, &packet); 1711bf808b50SKaike Wan init_ps_mdata(&mdata, &packet); 1712bf808b50SKaike Wan 1713bf808b50SKaike Wan while (1) { 1714bf808b50SKaike Wan struct hfi1_devdata *dd = rcd->dd; 1715bf808b50SKaike Wan __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head + 1716bf808b50SKaike Wan dd->rhf_offset; 1717bf808b50SKaike Wan struct ib_header *hdr; 1718bf808b50SKaike Wan u64 rhf = rhf_to_cpu(rhf_addr); 1719bf808b50SKaike Wan u32 etype = rhf_rcv_type(rhf), qpn; 1720bf808b50SKaike Wan u8 opcode; 1721bf808b50SKaike Wan u32 psn; 1722bf808b50SKaike Wan u8 lnh; 1723bf808b50SKaike Wan 1724bf808b50SKaike Wan if (ps_done(&mdata, rhf, rcd)) 1725bf808b50SKaike Wan break; 1726bf808b50SKaike Wan 1727bf808b50SKaike Wan if (ps_skip(&mdata, rhf, rcd)) 1728bf808b50SKaike Wan goto next; 1729bf808b50SKaike Wan 1730bf808b50SKaike Wan if (etype > RHF_RCV_TYPE_IB) 1731bf808b50SKaike Wan goto next; 1732bf808b50SKaike Wan 1733bf808b50SKaike Wan packet.hdr = hfi1_get_msgheader(dd, rhf_addr); 1734bf808b50SKaike Wan hdr = packet.hdr; 1735bf808b50SKaike Wan 1736bf808b50SKaike Wan lnh = be16_to_cpu(hdr->lrh[0]) & 3; 1737bf808b50SKaike Wan 1738bf808b50SKaike Wan if (lnh == HFI1_LRH_BTH) 1739bf808b50SKaike Wan packet.ohdr = &hdr->u.oth; 1740bf808b50SKaike Wan else if (lnh == HFI1_LRH_GRH) 1741bf808b50SKaike Wan packet.ohdr = &hdr->u.l.oth; 1742bf808b50SKaike Wan else 1743bf808b50SKaike Wan goto next; /* just in case */ 1744bf808b50SKaike Wan 1745bf808b50SKaike Wan opcode = (be32_to_cpu(packet.ohdr->bth[0]) >> 24); 1746bf808b50SKaike Wan qpn = be32_to_cpu(packet.ohdr->bth[1]) & RVT_QPN_MASK; 1747bf808b50SKaike Wan psn = mask_psn(be32_to_cpu(packet.ohdr->bth[2])); 1748bf808b50SKaike Wan 1749bf808b50SKaike Wan seq_printf(s, "\tEnt %u: opcode 0x%x, qpn 0x%x, psn 0x%x\n", 1750bf808b50SKaike Wan mdata.ps_head, opcode, qpn, psn); 1751bf808b50SKaike Wan next: 1752bf808b50SKaike Wan update_ps_mdata(&mdata, rcd); 1753bf808b50SKaike Wan } 1754bf808b50SKaike Wan } 1755