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 4365fd2b562SMitko Haralanov void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt, 4375fd2b562SMitko Haralanov bool do_cnp) 438f48ad614SDennis Dalessandro { 439f48ad614SDennis Dalessandro struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); 440261a4351SMike Marciniszyn struct ib_header *hdr = pkt->hdr; 441261a4351SMike Marciniszyn struct ib_other_headers *ohdr = pkt->ohdr; 4429039746cSDon Hiatt struct ib_grh *grh = pkt->grh; 4435fd2b562SMitko Haralanov u32 rqpn = 0, bth1; 444cb427057SDon Hiatt u16 rlid, dlid = ib_get_dlid(hdr); 4455fd2b562SMitko Haralanov u8 sc, svc_type; 4465fd2b562SMitko Haralanov bool is_mcast = false; 4475fd2b562SMitko Haralanov 448f48ad614SDennis Dalessandro switch (qp->ibqp.qp_type) { 449f48ad614SDennis Dalessandro case IB_QPT_SMI: 450f48ad614SDennis Dalessandro case IB_QPT_GSI: 451f48ad614SDennis Dalessandro case IB_QPT_UD: 452cb427057SDon Hiatt rlid = ib_get_slid(hdr); 4537dafbab3SDon Hiatt rqpn = ib_get_sqpn(ohdr); 454f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UD; 4555fd2b562SMitko Haralanov is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && 4565fd2b562SMitko Haralanov (dlid != be16_to_cpu(IB_LID_PERMISSIVE)); 457f48ad614SDennis Dalessandro break; 458f48ad614SDennis Dalessandro case IB_QPT_UC: 459d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 460f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 461f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_UC; 462f48ad614SDennis Dalessandro break; 463f48ad614SDennis Dalessandro case IB_QPT_RC: 464d8966fcdSDasaratharaman Chandramouli rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); 465f48ad614SDennis Dalessandro rqpn = qp->remote_qpn; 466f48ad614SDennis Dalessandro svc_type = IB_CC_SVCTYPE_RC; 467f48ad614SDennis Dalessandro break; 468f48ad614SDennis Dalessandro default: 469f48ad614SDennis Dalessandro return; 470f48ad614SDennis Dalessandro } 471f48ad614SDennis Dalessandro 472aad559c2SDasaratharaman Chandramouli sc = hfi1_9B_get_sc5(hdr, pkt->rhf); 473f48ad614SDennis Dalessandro 4745fd2b562SMitko Haralanov bth1 = be32_to_cpu(ohdr->bth[1]); 4753d591099SDon Hiatt if (do_cnp && (bth1 & IB_FECN_SMASK)) { 4767dafbab3SDon Hiatt u16 pkey = ib_bth_get_pkey(ohdr); 477f48ad614SDennis Dalessandro 4785fd2b562SMitko Haralanov return_cnp(ibp, qp, rqpn, pkey, dlid, rlid, sc, grh); 479f48ad614SDennis Dalessandro } 480f48ad614SDennis Dalessandro 4813d591099SDon Hiatt if (!is_mcast && (bth1 & IB_BECN_SMASK)) { 482f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); 483f48ad614SDennis Dalessandro u32 lqpn = bth1 & RVT_QPN_MASK; 4845fd2b562SMitko Haralanov u8 sl = ibp->sc_to_sl[sc]; 485f48ad614SDennis Dalessandro 486f48ad614SDennis Dalessandro process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); 487f48ad614SDennis Dalessandro } 4885fd2b562SMitko Haralanov 489f48ad614SDennis Dalessandro } 490f48ad614SDennis Dalessandro 491f48ad614SDennis Dalessandro struct ps_mdata { 492f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd; 493f48ad614SDennis Dalessandro u32 rsize; 494f48ad614SDennis Dalessandro u32 maxcnt; 495f48ad614SDennis Dalessandro u32 ps_head; 496f48ad614SDennis Dalessandro u32 ps_tail; 497f48ad614SDennis Dalessandro u32 ps_seq; 498f48ad614SDennis Dalessandro }; 499f48ad614SDennis Dalessandro 500f48ad614SDennis Dalessandro static inline void init_ps_mdata(struct ps_mdata *mdata, 501f48ad614SDennis Dalessandro struct hfi1_packet *packet) 502f48ad614SDennis Dalessandro { 503f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 504f48ad614SDennis Dalessandro 505f48ad614SDennis Dalessandro mdata->rcd = rcd; 506f48ad614SDennis Dalessandro mdata->rsize = packet->rsize; 507f48ad614SDennis Dalessandro mdata->maxcnt = packet->maxcnt; 508f48ad614SDennis Dalessandro mdata->ps_head = packet->rhqoff; 509f48ad614SDennis Dalessandro 510f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 511f48ad614SDennis Dalessandro mdata->ps_tail = get_rcvhdrtail(rcd); 512f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) 513f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 514f48ad614SDennis Dalessandro else 515f48ad614SDennis Dalessandro mdata->ps_seq = 0; /* not used with DMA_RTAIL */ 516f48ad614SDennis Dalessandro } else { 517f48ad614SDennis Dalessandro mdata->ps_tail = 0; /* used only with DMA_RTAIL*/ 518f48ad614SDennis Dalessandro mdata->ps_seq = rcd->seq_cnt; 519f48ad614SDennis Dalessandro } 520f48ad614SDennis Dalessandro } 521f48ad614SDennis Dalessandro 522f48ad614SDennis Dalessandro static inline int ps_done(struct ps_mdata *mdata, u64 rhf, 523f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 524f48ad614SDennis Dalessandro { 525f48ad614SDennis Dalessandro if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) 526f48ad614SDennis Dalessandro return mdata->ps_head == mdata->ps_tail; 527f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 528f48ad614SDennis Dalessandro } 529f48ad614SDennis Dalessandro 530f48ad614SDennis Dalessandro static inline int ps_skip(struct ps_mdata *mdata, u64 rhf, 531f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 532f48ad614SDennis Dalessandro { 533f48ad614SDennis Dalessandro /* 534f48ad614SDennis Dalessandro * Control context can potentially receive an invalid rhf. 535f48ad614SDennis Dalessandro * Drop such packets. 536f48ad614SDennis Dalessandro */ 537f48ad614SDennis Dalessandro if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail)) 538f48ad614SDennis Dalessandro return mdata->ps_seq != rhf_rcv_seq(rhf); 539f48ad614SDennis Dalessandro 540f48ad614SDennis Dalessandro return 0; 541f48ad614SDennis Dalessandro } 542f48ad614SDennis Dalessandro 543f48ad614SDennis Dalessandro static inline void update_ps_mdata(struct ps_mdata *mdata, 544f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd) 545f48ad614SDennis Dalessandro { 546f48ad614SDennis Dalessandro mdata->ps_head += mdata->rsize; 547f48ad614SDennis Dalessandro if (mdata->ps_head >= mdata->maxcnt) 548f48ad614SDennis Dalessandro mdata->ps_head = 0; 549f48ad614SDennis Dalessandro 550f48ad614SDennis Dalessandro /* Control context must do seq counting */ 551f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) || 552f48ad614SDennis Dalessandro (rcd->ctxt == HFI1_CTRL_CTXT)) { 553f48ad614SDennis Dalessandro if (++mdata->ps_seq > 13) 554f48ad614SDennis Dalessandro mdata->ps_seq = 1; 555f48ad614SDennis Dalessandro } 556f48ad614SDennis Dalessandro } 557f48ad614SDennis Dalessandro 558f48ad614SDennis Dalessandro /* 559f48ad614SDennis Dalessandro * prescan_rxq - search through the receive queue looking for packets 560f48ad614SDennis Dalessandro * containing Excplicit Congestion Notifications (FECNs, or BECNs). 561f48ad614SDennis Dalessandro * When an ECN is found, process the Congestion Notification, and toggle 562f48ad614SDennis Dalessandro * it off. 563f48ad614SDennis Dalessandro * This is declared as a macro to allow quick checking of the port to avoid 564f48ad614SDennis Dalessandro * the overhead of a function call if not enabled. 565f48ad614SDennis Dalessandro */ 566f48ad614SDennis Dalessandro #define prescan_rxq(rcd, packet) \ 567f48ad614SDennis Dalessandro do { \ 568f48ad614SDennis Dalessandro if (rcd->ppd->cc_prescan) \ 569f48ad614SDennis Dalessandro __prescan_rxq(packet); \ 570f48ad614SDennis Dalessandro } while (0) 571f48ad614SDennis Dalessandro static void __prescan_rxq(struct hfi1_packet *packet) 572f48ad614SDennis Dalessandro { 573f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 574f48ad614SDennis Dalessandro struct ps_mdata mdata; 575f48ad614SDennis Dalessandro 576f48ad614SDennis Dalessandro init_ps_mdata(&mdata, packet); 577f48ad614SDennis Dalessandro 578f48ad614SDennis Dalessandro while (1) { 579f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 580f3e862cbSSebastian Sanchez struct hfi1_ibport *ibp = rcd_to_iport(rcd); 581f48ad614SDennis Dalessandro __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head + 582f48ad614SDennis Dalessandro dd->rhf_offset; 583f48ad614SDennis Dalessandro struct rvt_qp *qp; 584261a4351SMike Marciniszyn struct ib_header *hdr; 585f48ad614SDennis Dalessandro struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 586f48ad614SDennis Dalessandro u64 rhf = rhf_to_cpu(rhf_addr); 587f48ad614SDennis Dalessandro u32 etype = rhf_rcv_type(rhf), qpn, bth1; 588f48ad614SDennis Dalessandro int is_ecn = 0; 589f48ad614SDennis Dalessandro u8 lnh; 590f48ad614SDennis Dalessandro 591f48ad614SDennis Dalessandro if (ps_done(&mdata, rhf, rcd)) 592f48ad614SDennis Dalessandro break; 593f48ad614SDennis Dalessandro 594f48ad614SDennis Dalessandro if (ps_skip(&mdata, rhf, rcd)) 595f48ad614SDennis Dalessandro goto next; 596f48ad614SDennis Dalessandro 597f48ad614SDennis Dalessandro if (etype != RHF_RCV_TYPE_IB) 598f48ad614SDennis Dalessandro goto next; 599f48ad614SDennis Dalessandro 600f2d8a0b3SDasaratharaman Chandramouli packet->hdr = hfi1_get_msgheader(dd, rhf_addr); 601f2d8a0b3SDasaratharaman Chandramouli hdr = packet->hdr; 602cb427057SDon Hiatt lnh = ib_get_lnh(hdr); 603f48ad614SDennis Dalessandro 604f2d8a0b3SDasaratharaman Chandramouli if (lnh == HFI1_LRH_BTH) { 605f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.oth; 6069039746cSDon Hiatt packet->grh = NULL; 607f2d8a0b3SDasaratharaman Chandramouli } else if (lnh == HFI1_LRH_GRH) { 608f2d8a0b3SDasaratharaman Chandramouli packet->ohdr = &hdr->u.l.oth; 6099039746cSDon Hiatt packet->grh = &hdr->u.l.grh; 610f2d8a0b3SDasaratharaman Chandramouli } else { 611f48ad614SDennis Dalessandro goto next; /* just in case */ 612f2d8a0b3SDasaratharaman Chandramouli } 6135fd2b562SMitko Haralanov 614f2d8a0b3SDasaratharaman Chandramouli bth1 = be32_to_cpu(packet->ohdr->bth[1]); 6153d591099SDon Hiatt is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK)); 616f48ad614SDennis Dalessandro 617f48ad614SDennis Dalessandro if (!is_ecn) 618f48ad614SDennis Dalessandro goto next; 619f48ad614SDennis Dalessandro 620f48ad614SDennis Dalessandro qpn = bth1 & RVT_QPN_MASK; 621f48ad614SDennis Dalessandro rcu_read_lock(); 622f48ad614SDennis Dalessandro qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn); 623f48ad614SDennis Dalessandro 624f48ad614SDennis Dalessandro if (!qp) { 625f48ad614SDennis Dalessandro rcu_read_unlock(); 626f48ad614SDennis Dalessandro goto next; 627f48ad614SDennis Dalessandro } 628f48ad614SDennis Dalessandro 6295fd2b562SMitko Haralanov process_ecn(qp, packet, true); 630f48ad614SDennis Dalessandro rcu_read_unlock(); 631f48ad614SDennis Dalessandro 632f48ad614SDennis Dalessandro /* turn off BECN, FECN */ 6333d591099SDon Hiatt bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK); 634f2d8a0b3SDasaratharaman Chandramouli packet->ohdr->bth[1] = cpu_to_be32(bth1); 635f48ad614SDennis Dalessandro next: 636f48ad614SDennis Dalessandro update_ps_mdata(&mdata, rcd); 637f48ad614SDennis Dalessandro } 638f48ad614SDennis Dalessandro } 639f48ad614SDennis Dalessandro 640a82a7fcdSMike Marciniszyn static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd) 641a82a7fcdSMike Marciniszyn { 642a82a7fcdSMike Marciniszyn struct rvt_qp *qp, *nqp; 643a82a7fcdSMike Marciniszyn 644a82a7fcdSMike Marciniszyn /* 645a82a7fcdSMike Marciniszyn * Iterate over all QPs waiting to respond. 646a82a7fcdSMike Marciniszyn * The list won't change since the IRQ is only run on one CPU. 647a82a7fcdSMike Marciniszyn */ 648a82a7fcdSMike Marciniszyn list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) { 649a82a7fcdSMike Marciniszyn list_del_init(&qp->rspwait); 650a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_NAK) { 651a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_NAK; 652a82a7fcdSMike Marciniszyn hfi1_send_rc_ack(rcd, qp, 0); 653a82a7fcdSMike Marciniszyn } 654a82a7fcdSMike Marciniszyn if (qp->r_flags & RVT_R_RSP_SEND) { 655a82a7fcdSMike Marciniszyn unsigned long flags; 656a82a7fcdSMike Marciniszyn 657a82a7fcdSMike Marciniszyn qp->r_flags &= ~RVT_R_RSP_SEND; 658a82a7fcdSMike Marciniszyn spin_lock_irqsave(&qp->s_lock, flags); 659a82a7fcdSMike Marciniszyn if (ib_rvt_state_ops[qp->state] & 660a82a7fcdSMike Marciniszyn RVT_PROCESS_OR_FLUSH_SEND) 661a82a7fcdSMike Marciniszyn hfi1_schedule_send(qp); 662a82a7fcdSMike Marciniszyn spin_unlock_irqrestore(&qp->s_lock, flags); 663a82a7fcdSMike Marciniszyn } 664a82a7fcdSMike Marciniszyn rvt_put_qp(qp); 665a82a7fcdSMike Marciniszyn } 666a82a7fcdSMike Marciniszyn } 667a82a7fcdSMike Marciniszyn 668a82a7fcdSMike Marciniszyn static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread) 669a82a7fcdSMike Marciniszyn { 670a82a7fcdSMike Marciniszyn if (thread) { 671a82a7fcdSMike Marciniszyn if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0) 672a82a7fcdSMike Marciniszyn /* allow defered processing */ 673a82a7fcdSMike Marciniszyn process_rcv_qp_work(packet->rcd); 674a82a7fcdSMike Marciniszyn cond_resched(); 675a82a7fcdSMike Marciniszyn return RCV_PKT_OK; 676a82a7fcdSMike Marciniszyn } else { 677a82a7fcdSMike Marciniszyn this_cpu_inc(*packet->rcd->dd->rcv_limit); 678a82a7fcdSMike Marciniszyn return RCV_PKT_LIMIT; 679a82a7fcdSMike Marciniszyn } 680a82a7fcdSMike Marciniszyn } 681a82a7fcdSMike Marciniszyn 682a82a7fcdSMike Marciniszyn static inline int check_max_packet(struct hfi1_packet *packet, int thread) 683f48ad614SDennis Dalessandro { 684f48ad614SDennis Dalessandro int ret = RCV_PKT_OK; 685f48ad614SDennis Dalessandro 686a82a7fcdSMike Marciniszyn if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0)) 687a82a7fcdSMike Marciniszyn ret = max_packet_exceeded(packet, thread); 688a82a7fcdSMike Marciniszyn return ret; 689a82a7fcdSMike Marciniszyn } 690a82a7fcdSMike Marciniszyn 691a82a7fcdSMike Marciniszyn static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread) 692a82a7fcdSMike Marciniszyn { 693a82a7fcdSMike Marciniszyn int ret; 694a82a7fcdSMike Marciniszyn 695f48ad614SDennis Dalessandro /* Set up for the next packet */ 696f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 697f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 698f48ad614SDennis Dalessandro packet->rhqoff = 0; 699f48ad614SDennis Dalessandro 700f48ad614SDennis Dalessandro packet->numpkt++; 701a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 702f48ad614SDennis Dalessandro 703f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 704f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 705f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 706f48ad614SDennis Dalessandro 707f48ad614SDennis Dalessandro return ret; 708f48ad614SDennis Dalessandro } 709f48ad614SDennis Dalessandro 710f48ad614SDennis Dalessandro static inline int process_rcv_packet(struct hfi1_packet *packet, int thread) 711f48ad614SDennis Dalessandro { 712a82a7fcdSMike Marciniszyn int ret; 713f48ad614SDennis Dalessandro 714f48ad614SDennis Dalessandro packet->etype = rhf_rcv_type(packet->rhf); 7159039746cSDon Hiatt 716f48ad614SDennis Dalessandro /* total length */ 717f48ad614SDennis Dalessandro packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */ 718f48ad614SDennis Dalessandro /* retrieve eager buffer details */ 719f48ad614SDennis Dalessandro packet->ebuf = NULL; 720f48ad614SDennis Dalessandro if (rhf_use_egr_bfr(packet->rhf)) { 721f48ad614SDennis Dalessandro packet->etail = rhf_egr_index(packet->rhf); 722f48ad614SDennis Dalessandro packet->ebuf = get_egrbuf(packet->rcd, packet->rhf, 723f48ad614SDennis Dalessandro &packet->updegr); 724f48ad614SDennis Dalessandro /* 725f48ad614SDennis Dalessandro * Prefetch the contents of the eager buffer. It is 726f48ad614SDennis Dalessandro * OK to send a negative length to prefetch_range(). 727f48ad614SDennis Dalessandro * The +2 is the size of the RHF. 728f48ad614SDennis Dalessandro */ 729f48ad614SDennis Dalessandro prefetch_range(packet->ebuf, 730f48ad614SDennis Dalessandro packet->tlen - ((packet->rcd->rcvhdrqentsize - 731f48ad614SDennis Dalessandro (rhf_hdrq_offset(packet->rhf) 732f48ad614SDennis Dalessandro + 2)) * 4)); 733f48ad614SDennis Dalessandro } 734f48ad614SDennis Dalessandro 735f48ad614SDennis Dalessandro /* 736f48ad614SDennis Dalessandro * Call a type specific handler for the packet. We 737f48ad614SDennis Dalessandro * should be able to trust that etype won't be beyond 738f48ad614SDennis Dalessandro * the range of valid indexes. If so something is really 739f48ad614SDennis Dalessandro * wrong and we can probably just let things come 740f48ad614SDennis Dalessandro * crashing down. There is no need to eat another 741f48ad614SDennis Dalessandro * comparison in this performance critical code. 742f48ad614SDennis Dalessandro */ 743f48ad614SDennis Dalessandro packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet); 744f48ad614SDennis Dalessandro packet->numpkt++; 745f48ad614SDennis Dalessandro 746f48ad614SDennis Dalessandro /* Set up for the next packet */ 747f48ad614SDennis Dalessandro packet->rhqoff += packet->rsize; 748f48ad614SDennis Dalessandro if (packet->rhqoff >= packet->maxcnt) 749f48ad614SDennis Dalessandro packet->rhqoff = 0; 750f48ad614SDennis Dalessandro 751a82a7fcdSMike Marciniszyn ret = check_max_packet(packet, thread); 752f48ad614SDennis Dalessandro 753f48ad614SDennis Dalessandro packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff + 754f48ad614SDennis Dalessandro packet->rcd->dd->rhf_offset; 755f48ad614SDennis Dalessandro packet->rhf = rhf_to_cpu(packet->rhf_addr); 756f48ad614SDennis Dalessandro 757f48ad614SDennis Dalessandro return ret; 758f48ad614SDennis Dalessandro } 759f48ad614SDennis Dalessandro 760f48ad614SDennis Dalessandro static inline void process_rcv_update(int last, struct hfi1_packet *packet) 761f48ad614SDennis Dalessandro { 762f48ad614SDennis Dalessandro /* 763f48ad614SDennis Dalessandro * Update head regs etc., every 16 packets, if not last pkt, 764f48ad614SDennis Dalessandro * to help prevent rcvhdrq overflows, when many packets 765f48ad614SDennis Dalessandro * are processed and queue is nearly full. 766f48ad614SDennis Dalessandro * Don't request an interrupt for intermediate updates. 767f48ad614SDennis Dalessandro */ 768f48ad614SDennis Dalessandro if (!last && !(packet->numpkt & 0xf)) { 769f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rhqoff, packet->updegr, 770f48ad614SDennis Dalessandro packet->etail, 0, 0); 771f48ad614SDennis Dalessandro packet->updegr = 0; 772f48ad614SDennis Dalessandro } 7739039746cSDon Hiatt packet->grh = NULL; 774f48ad614SDennis Dalessandro } 775f48ad614SDennis Dalessandro 776f48ad614SDennis Dalessandro static inline void finish_packet(struct hfi1_packet *packet) 777f48ad614SDennis Dalessandro { 778f48ad614SDennis Dalessandro /* 779f48ad614SDennis Dalessandro * Nothing we need to free for the packet. 780f48ad614SDennis Dalessandro * 781f48ad614SDennis Dalessandro * The only thing we need to do is a final update and call for an 782f48ad614SDennis Dalessandro * interrupt 783f48ad614SDennis Dalessandro */ 784f48ad614SDennis Dalessandro update_usrhead(packet->rcd, packet->rcd->head, packet->updegr, 785f48ad614SDennis Dalessandro packet->etail, rcv_intr_dynamic, packet->numpkt); 786f48ad614SDennis Dalessandro } 787f48ad614SDennis Dalessandro 788f48ad614SDennis Dalessandro /* 789f48ad614SDennis Dalessandro * Handle receive interrupts when using the no dma rtail option. 790f48ad614SDennis Dalessandro */ 791f48ad614SDennis Dalessandro int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread) 792f48ad614SDennis Dalessandro { 793f48ad614SDennis Dalessandro u32 seq; 794f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 795f48ad614SDennis Dalessandro struct hfi1_packet packet; 796f48ad614SDennis Dalessandro 797f48ad614SDennis Dalessandro init_packet(rcd, &packet); 798f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 799f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) { 800f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 801f48ad614SDennis Dalessandro goto bail; 802f48ad614SDennis Dalessandro } 803f48ad614SDennis Dalessandro 804f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 805f48ad614SDennis Dalessandro 806f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 807f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 808f48ad614SDennis Dalessandro seq = rhf_rcv_seq(packet.rhf); 809f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 810f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 811f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 812f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 813f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 814f48ad614SDennis Dalessandro } 815a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 816a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 817f48ad614SDennis Dalessandro bail: 818f48ad614SDennis Dalessandro finish_packet(&packet); 819f48ad614SDennis Dalessandro return last; 820f48ad614SDennis Dalessandro } 821f48ad614SDennis Dalessandro 822f48ad614SDennis Dalessandro int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread) 823f48ad614SDennis Dalessandro { 824f48ad614SDennis Dalessandro u32 hdrqtail; 825f48ad614SDennis Dalessandro int last = RCV_PKT_OK; 826f48ad614SDennis Dalessandro struct hfi1_packet packet; 827f48ad614SDennis Dalessandro 828f48ad614SDennis Dalessandro init_packet(rcd, &packet); 829f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 830f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 831f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 832f48ad614SDennis Dalessandro goto bail; 833f48ad614SDennis Dalessandro } 834f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 835f48ad614SDennis Dalessandro 836f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 837f48ad614SDennis Dalessandro 838f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 839f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 840f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 841f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 842f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 843f48ad614SDennis Dalessandro } 844a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 845a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 846f48ad614SDennis Dalessandro bail: 847f48ad614SDennis Dalessandro finish_packet(&packet); 848f48ad614SDennis Dalessandro return last; 849f48ad614SDennis Dalessandro } 850f48ad614SDennis Dalessandro 851e6f7622dSMichael J. Ruhl static inline void set_nodma_rtail(struct hfi1_devdata *dd, u16 ctxt) 852f48ad614SDennis Dalessandro { 853d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 854e6f7622dSMichael J. Ruhl u16 i; 855f48ad614SDennis Dalessandro 8562280740fSVishwanathapura, Niranjana /* 8572280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 8582280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 8592280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 8602280740fSVishwanathapura, Niranjana */ 8612280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 862d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, ctxt); 863d295dbebSMichael J. Ruhl if (rcd) { 864d295dbebSMichael J. Ruhl rcd->do_interrupt = 8652280740fSVishwanathapura, Niranjana &handle_receive_interrupt_nodma_rtail; 866d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 867d295dbebSMichael J. Ruhl } 8682280740fSVishwanathapura, Niranjana return; 8692280740fSVishwanathapura, Niranjana } 8702280740fSVishwanathapura, Niranjana 871d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) { 872d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 873d295dbebSMichael J. Ruhl if (rcd) 874d295dbebSMichael J. Ruhl rcd->do_interrupt = 875f48ad614SDennis Dalessandro &handle_receive_interrupt_nodma_rtail; 876d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 877d295dbebSMichael J. Ruhl } 878f48ad614SDennis Dalessandro } 879f48ad614SDennis Dalessandro 880e6f7622dSMichael J. Ruhl static inline void set_dma_rtail(struct hfi1_devdata *dd, u16 ctxt) 881f48ad614SDennis Dalessandro { 882d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 883e6f7622dSMichael J. Ruhl u16 i; 884f48ad614SDennis Dalessandro 8852280740fSVishwanathapura, Niranjana /* 8862280740fSVishwanathapura, Niranjana * For dynamically allocated kernel contexts (like vnic) switch 8872280740fSVishwanathapura, Niranjana * interrupt handler only for that context. Otherwise, switch 8882280740fSVishwanathapura, Niranjana * interrupt handler for all statically allocated kernel contexts. 8892280740fSVishwanathapura, Niranjana */ 8902280740fSVishwanathapura, Niranjana if (ctxt >= dd->first_dyn_alloc_ctxt) { 891d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, ctxt); 892d295dbebSMichael J. Ruhl if (rcd) { 893d295dbebSMichael J. Ruhl rcd->do_interrupt = 8942280740fSVishwanathapura, Niranjana &handle_receive_interrupt_dma_rtail; 895d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 896d295dbebSMichael J. Ruhl } 8972280740fSVishwanathapura, Niranjana return; 8982280740fSVishwanathapura, Niranjana } 8992280740fSVishwanathapura, Niranjana 900d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) { 901d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 902d295dbebSMichael J. Ruhl if (rcd) 903d295dbebSMichael J. Ruhl rcd->do_interrupt = 904f48ad614SDennis Dalessandro &handle_receive_interrupt_dma_rtail; 905d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 906d295dbebSMichael J. Ruhl } 907f48ad614SDennis Dalessandro } 908f48ad614SDennis Dalessandro 909f48ad614SDennis Dalessandro void set_all_slowpath(struct hfi1_devdata *dd) 910f48ad614SDennis Dalessandro { 911d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 912e6f7622dSMichael J. Ruhl u16 i; 913f48ad614SDennis Dalessandro 914f48ad614SDennis Dalessandro /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */ 9152280740fSVishwanathapura, Niranjana for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) { 916d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 917d295dbebSMichael J. Ruhl if (!rcd) 918d295dbebSMichael J. Ruhl continue; 9192280740fSVishwanathapura, Niranjana if ((i < dd->first_dyn_alloc_ctxt) || 920d295dbebSMichael J. Ruhl (rcd->sc && (rcd->sc->type == SC_KERNEL))) { 9212280740fSVishwanathapura, Niranjana rcd->do_interrupt = &handle_receive_interrupt; 9222280740fSVishwanathapura, Niranjana } 923d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 924d295dbebSMichael J. Ruhl } 925f48ad614SDennis Dalessandro } 926f48ad614SDennis Dalessandro 927f48ad614SDennis Dalessandro static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd, 928c867caafSMike Marciniszyn struct hfi1_packet *packet, 929f48ad614SDennis Dalessandro struct hfi1_devdata *dd) 930f48ad614SDennis Dalessandro { 931f48ad614SDennis Dalessandro struct work_struct *lsaw = &rcd->ppd->linkstate_active_work; 9329039746cSDon Hiatt u8 etype = rhf_rcv_type(packet->rhf); 9339039746cSDon Hiatt u8 sc = SC15_PACKET; 9349039746cSDon Hiatt 9359039746cSDon Hiatt if (etype == RHF_RCV_TYPE_IB) { 936261a4351SMike Marciniszyn struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd, 937c867caafSMike Marciniszyn packet->rhf_addr); 9389039746cSDon Hiatt sc = hfi1_9B_get_sc5(hdr, packet->rhf); 93972c07e2bSDon Hiatt } else if (etype == RHF_RCV_TYPE_BYPASS) { 94072c07e2bSDon Hiatt struct hfi1_16b_header *hdr = hfi1_get_16B_header( 94172c07e2bSDon Hiatt packet->rcd->dd, 94272c07e2bSDon Hiatt packet->rhf_addr); 94372c07e2bSDon Hiatt sc = hfi1_16B_get_sc(hdr); 9449039746cSDon Hiatt } 9459039746cSDon Hiatt if (sc != SC15_PACKET) { 946bec7c79cSByczkowski, Jakub int hwstate = driver_lstate(rcd->ppd); 947f48ad614SDennis Dalessandro 948bec7c79cSByczkowski, Jakub if (hwstate != IB_PORT_ACTIVE) { 949bec7c79cSByczkowski, Jakub dd_dev_info(dd, 950bec7c79cSByczkowski, Jakub "Unexpected link state %s\n", 951bec7c79cSByczkowski, Jakub opa_lstate_name(hwstate)); 952f48ad614SDennis Dalessandro return 0; 953f48ad614SDennis Dalessandro } 954f48ad614SDennis Dalessandro 95571d47008SSebastian Sanchez queue_work(rcd->ppd->link_wq, lsaw); 956f48ad614SDennis Dalessandro return 1; 957f48ad614SDennis Dalessandro } 958f48ad614SDennis Dalessandro return 0; 959f48ad614SDennis Dalessandro } 960f48ad614SDennis Dalessandro 961f48ad614SDennis Dalessandro /* 962f48ad614SDennis Dalessandro * handle_receive_interrupt - receive a packet 963f48ad614SDennis Dalessandro * @rcd: the context 964f48ad614SDennis Dalessandro * 965f48ad614SDennis Dalessandro * Called from interrupt handler for errors or receive interrupt. 966f48ad614SDennis Dalessandro * This is the slow path interrupt handler. 967f48ad614SDennis Dalessandro */ 968f48ad614SDennis Dalessandro int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread) 969f48ad614SDennis Dalessandro { 970f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 971f48ad614SDennis Dalessandro u32 hdrqtail; 972f48ad614SDennis Dalessandro int needset, last = RCV_PKT_OK; 973f48ad614SDennis Dalessandro struct hfi1_packet packet; 974f48ad614SDennis Dalessandro int skip_pkt = 0; 975f48ad614SDennis Dalessandro 976f48ad614SDennis Dalessandro /* Control context will always use the slow path interrupt handler */ 977f48ad614SDennis Dalessandro needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1; 978f48ad614SDennis Dalessandro 979f48ad614SDennis Dalessandro init_packet(rcd, &packet); 980f48ad614SDennis Dalessandro 981f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 982f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 983f48ad614SDennis Dalessandro 984f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) { 985f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 986f48ad614SDennis Dalessandro goto bail; 987f48ad614SDennis Dalessandro } 988f48ad614SDennis Dalessandro hdrqtail = 0; 989f48ad614SDennis Dalessandro } else { 990f48ad614SDennis Dalessandro hdrqtail = get_rcvhdrtail(rcd); 991f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) { 992f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 993f48ad614SDennis Dalessandro goto bail; 994f48ad614SDennis Dalessandro } 995f48ad614SDennis Dalessandro smp_rmb(); /* prevent speculative reads of dma'ed hdrq */ 996f48ad614SDennis Dalessandro 997f48ad614SDennis Dalessandro /* 998f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 999f48ad614SDennis Dalessandro * rhf. Drop such packets. 1000f48ad614SDennis Dalessandro */ 1001f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 1002f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1003f48ad614SDennis Dalessandro 1004f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 1005f48ad614SDennis Dalessandro skip_pkt = 1; 1006f48ad614SDennis Dalessandro } 1007f48ad614SDennis Dalessandro } 1008f48ad614SDennis Dalessandro 1009f48ad614SDennis Dalessandro prescan_rxq(rcd, &packet); 1010f48ad614SDennis Dalessandro 1011f48ad614SDennis Dalessandro while (last == RCV_PKT_OK) { 1012f48ad614SDennis Dalessandro if (unlikely(dd->do_drop && 1013f48ad614SDennis Dalessandro atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) == 1014f48ad614SDennis Dalessandro DROP_PACKET_ON)) { 1015f48ad614SDennis Dalessandro dd->do_drop = 0; 1016f48ad614SDennis Dalessandro 1017f48ad614SDennis Dalessandro /* On to the next packet */ 1018f48ad614SDennis Dalessandro packet.rhqoff += packet.rsize; 1019f48ad614SDennis Dalessandro packet.rhf_addr = (__le32 *)rcd->rcvhdrq + 1020f48ad614SDennis Dalessandro packet.rhqoff + 1021f48ad614SDennis Dalessandro dd->rhf_offset; 1022f48ad614SDennis Dalessandro packet.rhf = rhf_to_cpu(packet.rhf_addr); 1023f48ad614SDennis Dalessandro 1024f48ad614SDennis Dalessandro } else if (skip_pkt) { 1025f48ad614SDennis Dalessandro last = skip_rcv_packet(&packet, thread); 1026f48ad614SDennis Dalessandro skip_pkt = 0; 1027f48ad614SDennis Dalessandro } else { 1028f48ad614SDennis Dalessandro /* Auto activate link on non-SC15 packet receive */ 1029f48ad614SDennis Dalessandro if (unlikely(rcd->ppd->host_link_state == 1030f48ad614SDennis Dalessandro HLS_UP_ARMED) && 1031c867caafSMike Marciniszyn set_armed_to_active(rcd, &packet, dd)) 1032f48ad614SDennis Dalessandro goto bail; 1033f48ad614SDennis Dalessandro last = process_rcv_packet(&packet, thread); 1034f48ad614SDennis Dalessandro } 1035f48ad614SDennis Dalessandro 1036f48ad614SDennis Dalessandro if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { 1037f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1038f48ad614SDennis Dalessandro 1039f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 1040f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 1041f48ad614SDennis Dalessandro if (seq != rcd->seq_cnt) 1042f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1043f48ad614SDennis Dalessandro if (needset) { 1044f48ad614SDennis Dalessandro dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n"); 10452280740fSVishwanathapura, Niranjana set_nodma_rtail(dd, rcd->ctxt); 1046f48ad614SDennis Dalessandro needset = 0; 1047f48ad614SDennis Dalessandro } 1048f48ad614SDennis Dalessandro } else { 1049f48ad614SDennis Dalessandro if (packet.rhqoff == hdrqtail) 1050f48ad614SDennis Dalessandro last = RCV_PKT_DONE; 1051f48ad614SDennis Dalessandro /* 1052f48ad614SDennis Dalessandro * Control context can potentially receive an invalid 1053f48ad614SDennis Dalessandro * rhf. Drop such packets. 1054f48ad614SDennis Dalessandro */ 1055f48ad614SDennis Dalessandro if (rcd->ctxt == HFI1_CTRL_CTXT) { 1056f48ad614SDennis Dalessandro u32 seq = rhf_rcv_seq(packet.rhf); 1057f48ad614SDennis Dalessandro 1058f48ad614SDennis Dalessandro if (++rcd->seq_cnt > 13) 1059f48ad614SDennis Dalessandro rcd->seq_cnt = 1; 1060f48ad614SDennis Dalessandro if (!last && (seq != rcd->seq_cnt)) 1061f48ad614SDennis Dalessandro skip_pkt = 1; 1062f48ad614SDennis Dalessandro } 1063f48ad614SDennis Dalessandro 1064f48ad614SDennis Dalessandro if (needset) { 1065f48ad614SDennis Dalessandro dd_dev_info(dd, 1066f48ad614SDennis Dalessandro "Switching to DMA_RTAIL\n"); 10672280740fSVishwanathapura, Niranjana set_dma_rtail(dd, rcd->ctxt); 1068f48ad614SDennis Dalessandro needset = 0; 1069f48ad614SDennis Dalessandro } 1070f48ad614SDennis Dalessandro } 1071f48ad614SDennis Dalessandro 1072f48ad614SDennis Dalessandro process_rcv_update(last, &packet); 1073f48ad614SDennis Dalessandro } 1074f48ad614SDennis Dalessandro 1075a82a7fcdSMike Marciniszyn process_rcv_qp_work(rcd); 1076a82a7fcdSMike Marciniszyn rcd->head = packet.rhqoff; 1077f48ad614SDennis Dalessandro 1078f48ad614SDennis Dalessandro bail: 1079f48ad614SDennis Dalessandro /* 1080f48ad614SDennis Dalessandro * Always write head at end, and setup rcv interrupt, even 1081f48ad614SDennis Dalessandro * if no packets were processed. 1082f48ad614SDennis Dalessandro */ 1083f48ad614SDennis Dalessandro finish_packet(&packet); 1084f48ad614SDennis Dalessandro return last; 1085f48ad614SDennis Dalessandro } 1086f48ad614SDennis Dalessandro 1087f48ad614SDennis Dalessandro /* 1088f48ad614SDennis Dalessandro * We may discover in the interrupt that the hardware link state has 1089f48ad614SDennis Dalessandro * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet), 1090f48ad614SDennis Dalessandro * and we need to update the driver's notion of the link state. We cannot 1091f48ad614SDennis Dalessandro * run set_link_state from interrupt context, so we queue this function on 1092f48ad614SDennis Dalessandro * a workqueue. 1093f48ad614SDennis Dalessandro * 1094f48ad614SDennis Dalessandro * We delay the regular interrupt processing until after the state changes 1095f48ad614SDennis Dalessandro * so that the link will be in the correct state by the time any application 1096f48ad614SDennis Dalessandro * we wake up attempts to send a reply to any message it received. 1097f48ad614SDennis Dalessandro * (Subsequent receive interrupts may possibly force the wakeup before we 1098f48ad614SDennis Dalessandro * update the link state.) 1099f48ad614SDennis Dalessandro * 1100f48ad614SDennis Dalessandro * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes 1101f48ad614SDennis Dalessandro * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues, 1102f48ad614SDennis Dalessandro * so we're safe from use-after-free of the rcd. 1103f48ad614SDennis Dalessandro */ 1104f48ad614SDennis Dalessandro void receive_interrupt_work(struct work_struct *work) 1105f48ad614SDennis Dalessandro { 1106f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata, 1107f48ad614SDennis Dalessandro linkstate_active_work); 1108f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1109d295dbebSMichael J. Ruhl struct hfi1_ctxtdata *rcd; 1110e6f7622dSMichael J. Ruhl u16 i; 1111f48ad614SDennis Dalessandro 1112f48ad614SDennis Dalessandro /* Received non-SC15 packet implies neighbor_normal */ 1113f48ad614SDennis Dalessandro ppd->neighbor_normal = 1; 1114f48ad614SDennis Dalessandro set_link_state(ppd, HLS_UP_ACTIVE); 1115f48ad614SDennis Dalessandro 1116f48ad614SDennis Dalessandro /* 11172280740fSVishwanathapura, Niranjana * Interrupt all statically allocated kernel contexts that could 11182280740fSVishwanathapura, Niranjana * have had an interrupt during auto activation. 1119f48ad614SDennis Dalessandro */ 1120d295dbebSMichael J. Ruhl for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) { 1121d295dbebSMichael J. Ruhl rcd = hfi1_rcd_get_by_index(dd, i); 1122d295dbebSMichael J. Ruhl if (rcd) 1123d295dbebSMichael J. Ruhl force_recv_intr(rcd); 1124d295dbebSMichael J. Ruhl hfi1_rcd_put(rcd); 1125d295dbebSMichael J. Ruhl } 1126f48ad614SDennis Dalessandro } 1127f48ad614SDennis Dalessandro 1128f48ad614SDennis Dalessandro /* 1129f48ad614SDennis Dalessandro * Convert a given MTU size to the on-wire MAD packet enumeration. 1130f48ad614SDennis Dalessandro * Return -1 if the size is invalid. 1131f48ad614SDennis Dalessandro */ 1132f48ad614SDennis Dalessandro int mtu_to_enum(u32 mtu, int default_if_bad) 1133f48ad614SDennis Dalessandro { 1134f48ad614SDennis Dalessandro switch (mtu) { 1135f48ad614SDennis Dalessandro case 0: return OPA_MTU_0; 1136f48ad614SDennis Dalessandro case 256: return OPA_MTU_256; 1137f48ad614SDennis Dalessandro case 512: return OPA_MTU_512; 1138f48ad614SDennis Dalessandro case 1024: return OPA_MTU_1024; 1139f48ad614SDennis Dalessandro case 2048: return OPA_MTU_2048; 1140f48ad614SDennis Dalessandro case 4096: return OPA_MTU_4096; 1141f48ad614SDennis Dalessandro case 8192: return OPA_MTU_8192; 1142f48ad614SDennis Dalessandro case 10240: return OPA_MTU_10240; 1143f48ad614SDennis Dalessandro } 1144f48ad614SDennis Dalessandro return default_if_bad; 1145f48ad614SDennis Dalessandro } 1146f48ad614SDennis Dalessandro 1147f48ad614SDennis Dalessandro u16 enum_to_mtu(int mtu) 1148f48ad614SDennis Dalessandro { 1149f48ad614SDennis Dalessandro switch (mtu) { 1150f48ad614SDennis Dalessandro case OPA_MTU_0: return 0; 1151f48ad614SDennis Dalessandro case OPA_MTU_256: return 256; 1152f48ad614SDennis Dalessandro case OPA_MTU_512: return 512; 1153f48ad614SDennis Dalessandro case OPA_MTU_1024: return 1024; 1154f48ad614SDennis Dalessandro case OPA_MTU_2048: return 2048; 1155f48ad614SDennis Dalessandro case OPA_MTU_4096: return 4096; 1156f48ad614SDennis Dalessandro case OPA_MTU_8192: return 8192; 1157f48ad614SDennis Dalessandro case OPA_MTU_10240: return 10240; 1158f48ad614SDennis Dalessandro default: return 0xffff; 1159f48ad614SDennis Dalessandro } 1160f48ad614SDennis Dalessandro } 1161f48ad614SDennis Dalessandro 1162f48ad614SDennis Dalessandro /* 1163f48ad614SDennis Dalessandro * set_mtu - set the MTU 1164f48ad614SDennis Dalessandro * @ppd: the per port data 1165f48ad614SDennis Dalessandro * 1166f48ad614SDennis Dalessandro * We can handle "any" incoming size, the issue here is whether we 1167f48ad614SDennis Dalessandro * need to restrict our outgoing size. We do not deal with what happens 1168f48ad614SDennis Dalessandro * to programs that are already running when the size changes. 1169f48ad614SDennis Dalessandro */ 1170f48ad614SDennis Dalessandro int set_mtu(struct hfi1_pportdata *ppd) 1171f48ad614SDennis Dalessandro { 1172f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1173f48ad614SDennis Dalessandro int i, drain, ret = 0, is_up = 0; 1174f48ad614SDennis Dalessandro 1175f48ad614SDennis Dalessandro ppd->ibmtu = 0; 1176f48ad614SDennis Dalessandro for (i = 0; i < ppd->vls_supported; i++) 1177f48ad614SDennis Dalessandro if (ppd->ibmtu < dd->vld[i].mtu) 1178f48ad614SDennis Dalessandro ppd->ibmtu = dd->vld[i].mtu; 1179f48ad614SDennis Dalessandro ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd); 1180f48ad614SDennis Dalessandro 1181f48ad614SDennis Dalessandro mutex_lock(&ppd->hls_lock); 1182f48ad614SDennis Dalessandro if (ppd->host_link_state == HLS_UP_INIT || 1183f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ARMED || 1184f48ad614SDennis Dalessandro ppd->host_link_state == HLS_UP_ACTIVE) 1185f48ad614SDennis Dalessandro is_up = 1; 1186f48ad614SDennis Dalessandro 1187f48ad614SDennis Dalessandro drain = !is_ax(dd) && is_up; 1188f48ad614SDennis Dalessandro 1189f48ad614SDennis Dalessandro if (drain) 1190f48ad614SDennis Dalessandro /* 1191f48ad614SDennis Dalessandro * MTU is specified per-VL. To ensure that no packet gets 1192f48ad614SDennis Dalessandro * stuck (due, e.g., to the MTU for the packet's VL being 1193f48ad614SDennis Dalessandro * reduced), empty the per-VL FIFOs before adjusting MTU. 1194f48ad614SDennis Dalessandro */ 1195f48ad614SDennis Dalessandro ret = stop_drain_data_vls(dd); 1196f48ad614SDennis Dalessandro 1197f48ad614SDennis Dalessandro if (ret) { 1198f48ad614SDennis Dalessandro dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n", 1199f48ad614SDennis Dalessandro __func__); 1200f48ad614SDennis Dalessandro goto err; 1201f48ad614SDennis Dalessandro } 1202f48ad614SDennis Dalessandro 1203f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0); 1204f48ad614SDennis Dalessandro 1205f48ad614SDennis Dalessandro if (drain) 1206f48ad614SDennis Dalessandro open_fill_data_vls(dd); /* reopen all VLs */ 1207f48ad614SDennis Dalessandro 1208f48ad614SDennis Dalessandro err: 1209f48ad614SDennis Dalessandro mutex_unlock(&ppd->hls_lock); 1210f48ad614SDennis Dalessandro 1211f48ad614SDennis Dalessandro return ret; 1212f48ad614SDennis Dalessandro } 1213f48ad614SDennis Dalessandro 1214f48ad614SDennis Dalessandro int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc) 1215f48ad614SDennis Dalessandro { 1216f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1217f48ad614SDennis Dalessandro 1218f48ad614SDennis Dalessandro ppd->lid = lid; 1219f48ad614SDennis Dalessandro ppd->lmc = lmc; 1220f48ad614SDennis Dalessandro hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0); 1221f48ad614SDennis Dalessandro 1222f48ad614SDennis Dalessandro dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid); 1223f48ad614SDennis Dalessandro 1224f48ad614SDennis Dalessandro return 0; 1225f48ad614SDennis Dalessandro } 1226f48ad614SDennis Dalessandro 1227f48ad614SDennis Dalessandro void shutdown_led_override(struct hfi1_pportdata *ppd) 1228f48ad614SDennis Dalessandro { 1229f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1230f48ad614SDennis Dalessandro 1231f48ad614SDennis Dalessandro /* 1232f48ad614SDennis Dalessandro * This pairs with the memory barrier in hfi1_start_led_override to 1233f48ad614SDennis Dalessandro * ensure that we read the correct state of LED beaconing represented 1234f48ad614SDennis Dalessandro * by led_override_timer_active 1235f48ad614SDennis Dalessandro */ 1236f48ad614SDennis Dalessandro smp_rmb(); 1237f48ad614SDennis Dalessandro if (atomic_read(&ppd->led_override_timer_active)) { 1238f48ad614SDennis Dalessandro del_timer_sync(&ppd->led_override_timer); 1239f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 0); 1240f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1241f48ad614SDennis Dalessandro smp_wmb(); 1242f48ad614SDennis Dalessandro } 1243f48ad614SDennis Dalessandro 1244f48ad614SDennis Dalessandro /* Hand control of the LED to the DC for normal operation */ 1245f48ad614SDennis Dalessandro write_csr(dd, DCC_CFG_LED_CNTRL, 0); 1246f48ad614SDennis Dalessandro } 1247f48ad614SDennis Dalessandro 1248f48ad614SDennis Dalessandro static void run_led_override(unsigned long opaque) 1249f48ad614SDennis Dalessandro { 1250f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque; 1251f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 1252f48ad614SDennis Dalessandro unsigned long timeout; 1253f48ad614SDennis Dalessandro int phase_idx; 1254f48ad614SDennis Dalessandro 1255f48ad614SDennis Dalessandro if (!(dd->flags & HFI1_INITTED)) 1256f48ad614SDennis Dalessandro return; 1257f48ad614SDennis Dalessandro 1258f48ad614SDennis Dalessandro phase_idx = ppd->led_override_phase & 1; 1259f48ad614SDennis Dalessandro 1260f48ad614SDennis Dalessandro setextled(dd, phase_idx); 1261f48ad614SDennis Dalessandro 1262f48ad614SDennis Dalessandro timeout = ppd->led_override_vals[phase_idx]; 1263f48ad614SDennis Dalessandro 1264f48ad614SDennis Dalessandro /* Set up for next phase */ 1265f48ad614SDennis Dalessandro ppd->led_override_phase = !ppd->led_override_phase; 1266f48ad614SDennis Dalessandro 1267f48ad614SDennis Dalessandro mod_timer(&ppd->led_override_timer, jiffies + timeout); 1268f48ad614SDennis Dalessandro } 1269f48ad614SDennis Dalessandro 1270f48ad614SDennis Dalessandro /* 1271f48ad614SDennis Dalessandro * To have the LED blink in a particular pattern, provide timeon and timeoff 1272f48ad614SDennis Dalessandro * in milliseconds. 1273f48ad614SDennis Dalessandro * To turn off custom blinking and return to normal operation, use 1274f48ad614SDennis Dalessandro * shutdown_led_override() 1275f48ad614SDennis Dalessandro */ 1276f48ad614SDennis Dalessandro void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon, 1277f48ad614SDennis Dalessandro unsigned int timeoff) 1278f48ad614SDennis Dalessandro { 1279f48ad614SDennis Dalessandro if (!(ppd->dd->flags & HFI1_INITTED)) 1280f48ad614SDennis Dalessandro return; 1281f48ad614SDennis Dalessandro 1282f48ad614SDennis Dalessandro /* Convert to jiffies for direct use in timer */ 1283f48ad614SDennis Dalessandro ppd->led_override_vals[0] = msecs_to_jiffies(timeoff); 1284f48ad614SDennis Dalessandro ppd->led_override_vals[1] = msecs_to_jiffies(timeon); 1285f48ad614SDennis Dalessandro 1286f48ad614SDennis Dalessandro /* Arbitrarily start from LED on phase */ 1287f48ad614SDennis Dalessandro ppd->led_override_phase = 1; 1288f48ad614SDennis Dalessandro 1289f48ad614SDennis Dalessandro /* 1290f48ad614SDennis Dalessandro * If the timer has not already been started, do so. Use a "quick" 1291f48ad614SDennis Dalessandro * timeout so the handler will be called soon to look at our request. 1292f48ad614SDennis Dalessandro */ 1293f48ad614SDennis Dalessandro if (!timer_pending(&ppd->led_override_timer)) { 1294f48ad614SDennis Dalessandro setup_timer(&ppd->led_override_timer, run_led_override, 1295f48ad614SDennis Dalessandro (unsigned long)ppd); 1296f48ad614SDennis Dalessandro ppd->led_override_timer.expires = jiffies + 1; 1297f48ad614SDennis Dalessandro add_timer(&ppd->led_override_timer); 1298f48ad614SDennis Dalessandro atomic_set(&ppd->led_override_timer_active, 1); 1299f48ad614SDennis Dalessandro /* Ensure the atomic_set is visible to all CPUs */ 1300f48ad614SDennis Dalessandro smp_wmb(); 1301f48ad614SDennis Dalessandro } 1302f48ad614SDennis Dalessandro } 1303f48ad614SDennis Dalessandro 1304f48ad614SDennis Dalessandro /** 1305f48ad614SDennis Dalessandro * hfi1_reset_device - reset the chip if possible 1306f48ad614SDennis Dalessandro * @unit: the device to reset 1307f48ad614SDennis Dalessandro * 1308f48ad614SDennis Dalessandro * Whether or not reset is successful, we attempt to re-initialize the chip 1309f48ad614SDennis Dalessandro * (that is, much like a driver unload/reload). We clear the INITTED flag 1310f48ad614SDennis Dalessandro * so that the various entry points will fail until we reinitialize. For 1311f48ad614SDennis Dalessandro * now, we only allow this if no user contexts are open that use chip resources 1312f48ad614SDennis Dalessandro */ 1313f48ad614SDennis Dalessandro int hfi1_reset_device(int unit) 1314f48ad614SDennis Dalessandro { 1315e6f7622dSMichael J. Ruhl int ret; 1316f48ad614SDennis Dalessandro struct hfi1_devdata *dd = hfi1_lookup(unit); 1317f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd; 1318f48ad614SDennis Dalessandro int pidx; 1319f48ad614SDennis Dalessandro 1320f48ad614SDennis Dalessandro if (!dd) { 1321f48ad614SDennis Dalessandro ret = -ENODEV; 1322f48ad614SDennis Dalessandro goto bail; 1323f48ad614SDennis Dalessandro } 1324f48ad614SDennis Dalessandro 1325f48ad614SDennis Dalessandro dd_dev_info(dd, "Reset on unit %u requested\n", unit); 1326f48ad614SDennis Dalessandro 1327cb51c5d2SMike Marciniszyn if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) { 1328f48ad614SDennis Dalessandro dd_dev_info(dd, 1329f48ad614SDennis Dalessandro "Invalid unit number %u or not initialized or not present\n", 1330f48ad614SDennis Dalessandro unit); 1331f48ad614SDennis Dalessandro ret = -ENXIO; 1332f48ad614SDennis Dalessandro goto bail; 1333f48ad614SDennis Dalessandro } 1334f48ad614SDennis Dalessandro 1335d295dbebSMichael J. Ruhl /* If there are any user/vnic contexts, we cannot reset */ 1336d295dbebSMichael J. Ruhl mutex_lock(&hfi1_mutex); 1337f48ad614SDennis Dalessandro if (dd->rcd) 1338d295dbebSMichael J. Ruhl if (hfi1_stats.sps_ctxts) { 1339d295dbebSMichael J. Ruhl mutex_unlock(&hfi1_mutex); 1340f48ad614SDennis Dalessandro ret = -EBUSY; 1341f48ad614SDennis Dalessandro goto bail; 1342f48ad614SDennis Dalessandro } 1343d295dbebSMichael J. Ruhl mutex_unlock(&hfi1_mutex); 1344f48ad614SDennis Dalessandro 1345f48ad614SDennis Dalessandro for (pidx = 0; pidx < dd->num_pports; ++pidx) { 1346f48ad614SDennis Dalessandro ppd = dd->pport + pidx; 1347f48ad614SDennis Dalessandro 1348f48ad614SDennis Dalessandro shutdown_led_override(ppd); 1349f48ad614SDennis Dalessandro } 1350f48ad614SDennis Dalessandro if (dd->flags & HFI1_HAS_SEND_DMA) 1351f48ad614SDennis Dalessandro sdma_exit(dd); 1352f48ad614SDennis Dalessandro 1353f48ad614SDennis Dalessandro hfi1_reset_cpu_counters(dd); 1354f48ad614SDennis Dalessandro 1355f48ad614SDennis Dalessandro ret = hfi1_init(dd, 1); 1356f48ad614SDennis Dalessandro 1357f48ad614SDennis Dalessandro if (ret) 1358f48ad614SDennis Dalessandro dd_dev_err(dd, 1359f48ad614SDennis Dalessandro "Reinitialize unit %u after reset failed with %d\n", 1360f48ad614SDennis Dalessandro unit, ret); 1361f48ad614SDennis Dalessandro else 1362f48ad614SDennis Dalessandro dd_dev_info(dd, "Reinitialized unit %u after resetting\n", 1363f48ad614SDennis Dalessandro unit); 1364f48ad614SDennis Dalessandro 1365f48ad614SDennis Dalessandro bail: 1366f48ad614SDennis Dalessandro return ret; 1367f48ad614SDennis Dalessandro } 1368f48ad614SDennis Dalessandro 13699039746cSDon Hiatt static inline void hfi1_setup_ib_header(struct hfi1_packet *packet) 13709039746cSDon Hiatt { 13719039746cSDon Hiatt packet->hdr = (struct hfi1_ib_message_header *) 13729039746cSDon Hiatt hfi1_get_msgheader(packet->rcd->dd, 13739039746cSDon Hiatt packet->rhf_addr); 13749039746cSDon Hiatt packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; 13759039746cSDon Hiatt } 13769039746cSDon Hiatt 13775786adf3SDon Hiatt static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet) 13785786adf3SDon Hiatt { 13795786adf3SDon Hiatt struct hfi1_pportdata *ppd = packet->rcd->ppd; 13805786adf3SDon Hiatt 13815786adf3SDon Hiatt /* slid and dlid cannot be 0 */ 13825786adf3SDon Hiatt if ((!packet->slid) || (!packet->dlid)) 13835786adf3SDon Hiatt return -EINVAL; 13845786adf3SDon Hiatt 13855786adf3SDon Hiatt /* Compare port lid with incoming packet dlid */ 13865786adf3SDon Hiatt if ((!(hfi1_is_16B_mcast(packet->dlid))) && 13875786adf3SDon Hiatt (packet->dlid != 13885786adf3SDon Hiatt opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) { 13895786adf3SDon Hiatt if (packet->dlid != ppd->lid) 13905786adf3SDon Hiatt return -EINVAL; 13915786adf3SDon Hiatt } 13925786adf3SDon Hiatt 13935786adf3SDon Hiatt /* No multicast packets with SC15 */ 13945786adf3SDon Hiatt if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF)) 13955786adf3SDon Hiatt return -EINVAL; 13965786adf3SDon Hiatt 13975786adf3SDon Hiatt /* Packets with permissive DLID always on SC15 */ 13985786adf3SDon Hiatt if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 13995786adf3SDon Hiatt 16B)) && 14005786adf3SDon Hiatt (packet->sc != 0xF)) 14015786adf3SDon Hiatt return -EINVAL; 14025786adf3SDon Hiatt 14035786adf3SDon Hiatt return 0; 14045786adf3SDon Hiatt } 14055786adf3SDon Hiatt 14069039746cSDon Hiatt static int hfi1_setup_9B_packet(struct hfi1_packet *packet) 14079039746cSDon Hiatt { 14089039746cSDon Hiatt struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); 14099039746cSDon Hiatt struct ib_header *hdr; 14109039746cSDon Hiatt u8 lnh; 14119039746cSDon Hiatt 14129039746cSDon Hiatt hfi1_setup_ib_header(packet); 14139039746cSDon Hiatt hdr = packet->hdr; 14149039746cSDon Hiatt 14159039746cSDon Hiatt lnh = ib_get_lnh(hdr); 14169039746cSDon Hiatt if (lnh == HFI1_LRH_BTH) { 14179039746cSDon Hiatt packet->ohdr = &hdr->u.oth; 14189039746cSDon Hiatt packet->grh = NULL; 14199039746cSDon Hiatt } else if (lnh == HFI1_LRH_GRH) { 14209039746cSDon Hiatt u32 vtf; 14219039746cSDon Hiatt 14229039746cSDon Hiatt packet->ohdr = &hdr->u.l.oth; 14239039746cSDon Hiatt packet->grh = &hdr->u.l.grh; 14249039746cSDon Hiatt if (packet->grh->next_hdr != IB_GRH_NEXT_HDR) 14259039746cSDon Hiatt goto drop; 14269039746cSDon Hiatt vtf = be32_to_cpu(packet->grh->version_tclass_flow); 14279039746cSDon Hiatt if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 14289039746cSDon Hiatt goto drop; 14299039746cSDon Hiatt } else { 14309039746cSDon Hiatt goto drop; 14319039746cSDon Hiatt } 14329039746cSDon Hiatt 14339039746cSDon Hiatt /* Query commonly used fields from packet header */ 143472c07e2bSDon Hiatt packet->payload = packet->ebuf; 14359039746cSDon Hiatt packet->opcode = ib_bth_get_opcode(packet->ohdr); 14369039746cSDon Hiatt packet->slid = ib_get_slid(hdr); 14379039746cSDon Hiatt packet->dlid = ib_get_dlid(hdr); 143872c07e2bSDon Hiatt if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) && 143972c07e2bSDon Hiatt (packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE)))) 144072c07e2bSDon Hiatt packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) - 144172c07e2bSDon Hiatt be16_to_cpu(IB_MULTICAST_LID_BASE); 14429039746cSDon Hiatt packet->sl = ib_get_sl(hdr); 14439039746cSDon Hiatt packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf); 14449039746cSDon Hiatt packet->pad = ib_bth_get_pad(packet->ohdr); 14459039746cSDon Hiatt packet->extra_byte = 0; 14469039746cSDon Hiatt packet->fecn = ib_bth_get_fecn(packet->ohdr); 14479039746cSDon Hiatt packet->becn = ib_bth_get_becn(packet->ohdr); 14489039746cSDon Hiatt 14499039746cSDon Hiatt return 0; 14509039746cSDon Hiatt drop: 14519039746cSDon Hiatt ibp->rvp.n_pkt_drops++; 14529039746cSDon Hiatt return -EINVAL; 14539039746cSDon Hiatt } 14549039746cSDon Hiatt 145572c07e2bSDon Hiatt static int hfi1_setup_bypass_packet(struct hfi1_packet *packet) 145672c07e2bSDon Hiatt { 145772c07e2bSDon Hiatt /* 145872c07e2bSDon Hiatt * Bypass packets have a different header/payload split 145972c07e2bSDon Hiatt * compared to an IB packet. 146072c07e2bSDon Hiatt * Current split is set such that 16 bytes of the actual 146172c07e2bSDon Hiatt * header is in the header buffer and the remining is in 146272c07e2bSDon Hiatt * the eager buffer. We chose 16 since hfi1 driver only 146372c07e2bSDon Hiatt * supports 16B bypass packets and we will be able to 146472c07e2bSDon Hiatt * receive the entire LRH with such a split. 146572c07e2bSDon Hiatt */ 146672c07e2bSDon Hiatt 146772c07e2bSDon Hiatt struct hfi1_ctxtdata *rcd = packet->rcd; 146872c07e2bSDon Hiatt struct hfi1_pportdata *ppd = rcd->ppd; 146972c07e2bSDon Hiatt struct hfi1_ibport *ibp = &ppd->ibport_data; 147072c07e2bSDon Hiatt u8 l4; 147172c07e2bSDon Hiatt u8 grh_len; 147272c07e2bSDon Hiatt 147372c07e2bSDon Hiatt packet->hdr = (struct hfi1_16b_header *) 147472c07e2bSDon Hiatt hfi1_get_16B_header(packet->rcd->dd, 147572c07e2bSDon Hiatt packet->rhf_addr); 147672c07e2bSDon Hiatt packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr; 147772c07e2bSDon Hiatt 147872c07e2bSDon Hiatt l4 = hfi1_16B_get_l4(packet->hdr); 147972c07e2bSDon Hiatt if (l4 == OPA_16B_L4_IB_LOCAL) { 148072c07e2bSDon Hiatt grh_len = 0; 148172c07e2bSDon Hiatt packet->ohdr = packet->ebuf; 148272c07e2bSDon Hiatt packet->grh = NULL; 148372c07e2bSDon Hiatt } else if (l4 == OPA_16B_L4_IB_GLOBAL) { 148472c07e2bSDon Hiatt u32 vtf; 148572c07e2bSDon Hiatt 148672c07e2bSDon Hiatt grh_len = sizeof(struct ib_grh); 148772c07e2bSDon Hiatt packet->ohdr = packet->ebuf + grh_len; 148872c07e2bSDon Hiatt packet->grh = packet->ebuf; 148972c07e2bSDon Hiatt if (packet->grh->next_hdr != IB_GRH_NEXT_HDR) 149072c07e2bSDon Hiatt goto drop; 149172c07e2bSDon Hiatt vtf = be32_to_cpu(packet->grh->version_tclass_flow); 149272c07e2bSDon Hiatt if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 149372c07e2bSDon Hiatt goto drop; 149472c07e2bSDon Hiatt } else { 149572c07e2bSDon Hiatt goto drop; 149672c07e2bSDon Hiatt } 149772c07e2bSDon Hiatt 149872c07e2bSDon Hiatt /* Query commonly used fields from packet header */ 149972c07e2bSDon Hiatt packet->opcode = ib_bth_get_opcode(packet->ohdr); 150072c07e2bSDon Hiatt packet->hlen = hdr_len_by_opcode[packet->opcode] + 8 + grh_len; 150172c07e2bSDon Hiatt packet->payload = packet->ebuf + packet->hlen - (4 * sizeof(u32)); 150272c07e2bSDon Hiatt packet->slid = hfi1_16B_get_slid(packet->hdr); 150372c07e2bSDon Hiatt packet->dlid = hfi1_16B_get_dlid(packet->hdr); 150472c07e2bSDon Hiatt if (unlikely(hfi1_is_16B_mcast(packet->dlid))) 150572c07e2bSDon Hiatt packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) - 150672c07e2bSDon Hiatt opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR), 150772c07e2bSDon Hiatt 16B); 150872c07e2bSDon Hiatt packet->sc = hfi1_16B_get_sc(packet->hdr); 150972c07e2bSDon Hiatt packet->sl = ibp->sc_to_sl[packet->sc]; 151072c07e2bSDon Hiatt packet->pad = hfi1_16B_bth_get_pad(packet->ohdr); 151172c07e2bSDon Hiatt packet->extra_byte = SIZE_OF_LT; 151272c07e2bSDon Hiatt packet->fecn = hfi1_16B_get_fecn(packet->hdr); 151372c07e2bSDon Hiatt packet->becn = hfi1_16B_get_becn(packet->hdr); 151472c07e2bSDon Hiatt 15155786adf3SDon Hiatt if (hfi1_bypass_ingress_pkt_check(packet)) 15165786adf3SDon Hiatt goto drop; 15175786adf3SDon Hiatt 151872c07e2bSDon Hiatt return 0; 151972c07e2bSDon Hiatt drop: 152072c07e2bSDon Hiatt hfi1_cdbg(PKT, "%s: packet dropped\n", __func__); 152172c07e2bSDon Hiatt ibp->rvp.n_pkt_drops++; 152272c07e2bSDon Hiatt return -EINVAL; 152372c07e2bSDon Hiatt } 152472c07e2bSDon Hiatt 1525f48ad614SDennis Dalessandro void handle_eflags(struct hfi1_packet *packet) 1526f48ad614SDennis Dalessandro { 1527f48ad614SDennis Dalessandro struct hfi1_ctxtdata *rcd = packet->rcd; 1528f48ad614SDennis Dalessandro u32 rte = rhf_rcv_type_err(packet->rhf); 1529f48ad614SDennis Dalessandro 1530f48ad614SDennis Dalessandro rcv_hdrerr(rcd, rcd->ppd, packet); 1531f48ad614SDennis Dalessandro if (rhf_err_flags(packet->rhf)) 1532f48ad614SDennis Dalessandro dd_dev_err(rcd->dd, 1533f48ad614SDennis Dalessandro "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n", 1534f48ad614SDennis Dalessandro rcd->ctxt, packet->rhf, 1535f48ad614SDennis Dalessandro packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "", 1536f48ad614SDennis Dalessandro packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "", 1537f48ad614SDennis Dalessandro packet->rhf & RHF_DC_ERR ? "dc " : "", 1538f48ad614SDennis Dalessandro packet->rhf & RHF_TID_ERR ? "tid " : "", 1539f48ad614SDennis Dalessandro packet->rhf & RHF_LEN_ERR ? "len " : "", 1540f48ad614SDennis Dalessandro packet->rhf & RHF_ECC_ERR ? "ecc " : "", 1541f48ad614SDennis Dalessandro packet->rhf & RHF_VCRC_ERR ? "vcrc " : "", 1542f48ad614SDennis Dalessandro packet->rhf & RHF_ICRC_ERR ? "icrc " : "", 1543f48ad614SDennis Dalessandro rte); 1544f48ad614SDennis Dalessandro } 1545f48ad614SDennis Dalessandro 1546f48ad614SDennis Dalessandro /* 1547f48ad614SDennis Dalessandro * The following functions are called by the interrupt handler. They are type 1548f48ad614SDennis Dalessandro * specific handlers for each packet type. 1549f48ad614SDennis Dalessandro */ 1550f48ad614SDennis Dalessandro int process_receive_ib(struct hfi1_packet *packet) 1551f48ad614SDennis Dalessandro { 15520181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 15530181ce31SDon Hiatt return RHF_RCV_CONTINUE; 15540181ce31SDon Hiatt 15559039746cSDon Hiatt if (hfi1_setup_9B_packet(packet)) 15569039746cSDon Hiatt return RHF_RCV_CONTINUE; 15579039746cSDon Hiatt 1558f48ad614SDennis Dalessandro trace_hfi1_rcvhdr(packet->rcd->ppd->dd, 1559f48ad614SDennis Dalessandro packet->rcd->ctxt, 1560f48ad614SDennis Dalessandro rhf_err_flags(packet->rhf), 1561f48ad614SDennis Dalessandro RHF_RCV_TYPE_IB, 1562f48ad614SDennis Dalessandro packet->hlen, 1563f48ad614SDennis Dalessandro packet->tlen, 1564f48ad614SDennis Dalessandro packet->updegr, 1565f48ad614SDennis Dalessandro rhf_egr_index(packet->rhf)); 1566f48ad614SDennis Dalessandro 1567243d9f43SDon Hiatt if (unlikely( 1568243d9f43SDon Hiatt (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1569243d9f43SDon Hiatt (packet->rhf & RHF_DC_ERR)))) 1570243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1571243d9f43SDon Hiatt 1572f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) { 1573f48ad614SDennis Dalessandro handle_eflags(packet); 1574f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1575f48ad614SDennis Dalessandro } 1576f48ad614SDennis Dalessandro 1577f48ad614SDennis Dalessandro hfi1_ib_rcv(packet); 1578f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1579f48ad614SDennis Dalessandro } 1580f48ad614SDennis Dalessandro 1581d4829ea6SVishwanathapura, Niranjana static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet) 1582d4829ea6SVishwanathapura, Niranjana { 1583d4829ea6SVishwanathapura, Niranjana /* Packet received in VNIC context via RSM */ 1584d4829ea6SVishwanathapura, Niranjana if (packet->rcd->is_vnic) 1585d4829ea6SVishwanathapura, Niranjana return true; 1586d4829ea6SVishwanathapura, Niranjana 158772c07e2bSDon Hiatt if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) && 158872c07e2bSDon Hiatt (hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR)) 1589d4829ea6SVishwanathapura, Niranjana return true; 1590d4829ea6SVishwanathapura, Niranjana 1591d4829ea6SVishwanathapura, Niranjana return false; 1592d4829ea6SVishwanathapura, Niranjana } 1593d4829ea6SVishwanathapura, Niranjana 1594f48ad614SDennis Dalessandro int process_receive_bypass(struct hfi1_packet *packet) 1595f48ad614SDennis Dalessandro { 1596505efe3eSJakub Pawlak struct hfi1_devdata *dd = packet->rcd->dd; 1597505efe3eSJakub Pawlak 159872c07e2bSDon Hiatt if (hfi1_is_vnic_packet(packet)) { 1599d4829ea6SVishwanathapura, Niranjana hfi1_vnic_bypass_rcv(packet); 1600d4829ea6SVishwanathapura, Niranjana return RHF_RCV_CONTINUE; 1601d4829ea6SVishwanathapura, Niranjana } 1602f48ad614SDennis Dalessandro 160372c07e2bSDon Hiatt if (hfi1_setup_bypass_packet(packet)) 160472c07e2bSDon Hiatt return RHF_RCV_CONTINUE; 160572c07e2bSDon Hiatt 160672c07e2bSDon Hiatt if (unlikely(rhf_err_flags(packet->rhf))) { 160772c07e2bSDon Hiatt handle_eflags(packet); 160872c07e2bSDon Hiatt return RHF_RCV_CONTINUE; 160972c07e2bSDon Hiatt } 161072c07e2bSDon Hiatt 161172c07e2bSDon Hiatt if (hfi1_16B_get_l2(packet->hdr) == 0x2) { 161272c07e2bSDon Hiatt hfi1_16B_rcv(packet); 161372c07e2bSDon Hiatt } else { 161472c07e2bSDon Hiatt dd_dev_err(dd, 161572c07e2bSDon Hiatt "Bypass packets other than 16B are not supported in normal operation. Dropping\n"); 1616505efe3eSJakub Pawlak incr_cntr64(&dd->sw_rcv_bypass_packet_errors); 161772c07e2bSDon Hiatt if (!(dd->err_info_rcvport.status_and_code & 161872c07e2bSDon Hiatt OPA_EI_STATUS_SMASK)) { 1619505efe3eSJakub Pawlak u64 *flits = packet->ebuf; 1620505efe3eSJakub Pawlak 1621505efe3eSJakub Pawlak if (flits && !(packet->rhf & RHF_LEN_ERR)) { 1622505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit1 = flits[0]; 1623505efe3eSJakub Pawlak dd->err_info_rcvport.packet_flit2 = 162472c07e2bSDon Hiatt packet->tlen > sizeof(flits[0]) ? 162572c07e2bSDon Hiatt flits[1] : 0; 1626505efe3eSJakub Pawlak } 1627505efe3eSJakub Pawlak dd->err_info_rcvport.status_and_code |= 1628505efe3eSJakub Pawlak (OPA_EI_STATUS_SMASK | BAD_L2_ERR); 1629505efe3eSJakub Pawlak } 163072c07e2bSDon Hiatt } 1631f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1632f48ad614SDennis Dalessandro } 1633f48ad614SDennis Dalessandro 1634f48ad614SDennis Dalessandro int process_receive_error(struct hfi1_packet *packet) 1635f48ad614SDennis Dalessandro { 1636243d9f43SDon Hiatt /* KHdrHCRCErr -- KDETH packet with a bad HCRC */ 1637243d9f43SDon Hiatt if (unlikely( 1638243d9f43SDon Hiatt hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) && 1639243d9f43SDon Hiatt rhf_rcv_type_err(packet->rhf) == 3)) 1640243d9f43SDon Hiatt return RHF_RCV_CONTINUE; 1641243d9f43SDon Hiatt 16429039746cSDon Hiatt hfi1_setup_ib_header(packet); 1643f48ad614SDennis Dalessandro handle_eflags(packet); 1644f48ad614SDennis Dalessandro 1645f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1646f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1647f48ad614SDennis Dalessandro "Unhandled error packet received. Dropping.\n"); 1648f48ad614SDennis Dalessandro 1649f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1650f48ad614SDennis Dalessandro } 1651f48ad614SDennis Dalessandro 1652f48ad614SDennis Dalessandro int kdeth_process_expected(struct hfi1_packet *packet) 1653f48ad614SDennis Dalessandro { 16540181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 16550181ce31SDon Hiatt return RHF_RCV_CONTINUE; 16569039746cSDon Hiatt 16579039746cSDon Hiatt hfi1_setup_ib_header(packet); 1658f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1659f48ad614SDennis Dalessandro handle_eflags(packet); 1660f48ad614SDennis Dalessandro 1661f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1662f48ad614SDennis Dalessandro "Unhandled expected packet received. Dropping.\n"); 1663f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1664f48ad614SDennis Dalessandro } 1665f48ad614SDennis Dalessandro 1666f48ad614SDennis Dalessandro int kdeth_process_eager(struct hfi1_packet *packet) 1667f48ad614SDennis Dalessandro { 16689039746cSDon Hiatt hfi1_setup_ib_header(packet); 1669f48ad614SDennis Dalessandro if (unlikely(rhf_err_flags(packet->rhf))) 1670f48ad614SDennis Dalessandro handle_eflags(packet); 16710181ce31SDon Hiatt if (unlikely(hfi1_dbg_fault_packet(packet))) 16720181ce31SDon Hiatt return RHF_RCV_CONTINUE; 1673f48ad614SDennis Dalessandro 1674f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, 1675f48ad614SDennis Dalessandro "Unhandled eager packet received. Dropping.\n"); 1676f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1677f48ad614SDennis Dalessandro } 1678f48ad614SDennis Dalessandro 1679f48ad614SDennis Dalessandro int process_receive_invalid(struct hfi1_packet *packet) 1680f48ad614SDennis Dalessandro { 1681f48ad614SDennis Dalessandro dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n", 1682f48ad614SDennis Dalessandro rhf_rcv_type(packet->rhf)); 1683f48ad614SDennis Dalessandro return RHF_RCV_CONTINUE; 1684f48ad614SDennis Dalessandro } 1685