1953 lines
51 KiB
C
1953 lines
51 KiB
C
/*
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* Copyright(c) 2015-2020 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/spinlock.h>
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#include <linux/pci.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <linux/prefetch.h>
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#include <rdma/ib_verbs.h>
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#include <linux/etherdevice.h>
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#include "hfi.h"
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#include "trace.h"
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#include "qp.h"
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#include "sdma.h"
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#include "debugfs.h"
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#include "vnic.h"
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#include "fault.h"
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#include "ipoib.h"
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#include "netdev.h"
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#undef pr_fmt
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#define pr_fmt(fmt) DRIVER_NAME ": " fmt
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/*
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* The size has to be longer than this string, so we can append
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* board/chip information to it in the initialization code.
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*/
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const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n";
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DEFINE_MUTEX(hfi1_mutex); /* general driver use */
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unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
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module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO);
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MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is " __stringify(
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HFI1_DEFAULT_MAX_MTU));
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unsigned int hfi1_cu = 1;
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module_param_named(cu, hfi1_cu, uint, S_IRUGO);
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MODULE_PARM_DESC(cu, "Credit return units");
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unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT;
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static int hfi1_caps_set(const char *val, const struct kernel_param *kp);
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static int hfi1_caps_get(char *buffer, const struct kernel_param *kp);
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static const struct kernel_param_ops cap_ops = {
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.set = hfi1_caps_set,
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.get = hfi1_caps_get
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};
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module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO);
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MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("Intel Omni-Path Architecture driver");
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/*
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* MAX_PKT_RCV is the max # if packets processed per receive interrupt.
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*/
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#define MAX_PKT_RECV 64
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/*
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* MAX_PKT_THREAD_RCV is the max # of packets processed before
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* the qp_wait_list queue is flushed.
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*/
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#define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4)
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#define EGR_HEAD_UPDATE_THRESHOLD 16
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struct hfi1_ib_stats hfi1_stats;
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static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
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{
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int ret = 0;
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unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
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cap_mask = *cap_mask_ptr, value, diff,
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write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
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HFI1_CAP_WRITABLE_MASK);
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ret = kstrtoul(val, 0, &value);
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if (ret) {
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pr_warn("Invalid module parameter value for 'cap_mask'\n");
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goto done;
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}
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/* Get the changed bits (except the locked bit) */
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diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
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/* Remove any bits that are not allowed to change after driver load */
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if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
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pr_warn("Ignoring non-writable capability bits %#lx\n",
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diff & ~write_mask);
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diff &= write_mask;
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}
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/* Mask off any reserved bits */
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diff &= ~HFI1_CAP_RESERVED_MASK;
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/* Clear any previously set and changing bits */
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cap_mask &= ~diff;
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/* Update the bits with the new capability */
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cap_mask |= (value & diff);
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/* Check for any kernel/user restrictions */
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diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
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((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
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cap_mask &= ~diff;
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/* Set the bitmask to the final set */
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*cap_mask_ptr = cap_mask;
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done:
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return ret;
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}
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static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
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{
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unsigned long cap_mask = *(unsigned long *)kp->arg;
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cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
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cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
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return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
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}
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struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi)
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{
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struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
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struct hfi1_devdata *dd = container_of(ibdev,
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struct hfi1_devdata, verbs_dev);
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return dd->pcidev;
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}
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/*
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* Return count of units with at least one port ACTIVE.
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*/
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int hfi1_count_active_units(void)
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{
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struct hfi1_devdata *dd;
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struct hfi1_pportdata *ppd;
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unsigned long index, flags;
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int pidx, nunits_active = 0;
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xa_lock_irqsave(&hfi1_dev_table, flags);
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xa_for_each(&hfi1_dev_table, index, dd) {
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if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase1)
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continue;
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for (pidx = 0; pidx < dd->num_pports; ++pidx) {
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ppd = dd->pport + pidx;
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if (ppd->lid && ppd->linkup) {
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nunits_active++;
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break;
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}
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}
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}
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xa_unlock_irqrestore(&hfi1_dev_table, flags);
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return nunits_active;
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}
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/*
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* Get address of eager buffer from it's index (allocated in chunks, not
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* contiguous).
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*/
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static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
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u8 *update)
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{
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u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
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*update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
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return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
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(offset * RCV_BUF_BLOCK_SIZE));
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}
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static inline void *hfi1_get_header(struct hfi1_ctxtdata *rcd,
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__le32 *rhf_addr)
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{
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u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr));
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return (void *)(rhf_addr - rcd->rhf_offset + offset);
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}
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static inline struct ib_header *hfi1_get_msgheader(struct hfi1_ctxtdata *rcd,
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__le32 *rhf_addr)
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{
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return (struct ib_header *)hfi1_get_header(rcd, rhf_addr);
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}
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static inline struct hfi1_16b_header
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*hfi1_get_16B_header(struct hfi1_ctxtdata *rcd,
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__le32 *rhf_addr)
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{
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return (struct hfi1_16b_header *)hfi1_get_header(rcd, rhf_addr);
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}
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/*
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* Validate and encode the a given RcvArray Buffer size.
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* The function will check whether the given size falls within
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* allowed size ranges for the respective type and, optionally,
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* return the proper encoding.
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*/
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int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
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{
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if (unlikely(!PAGE_ALIGNED(size)))
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return 0;
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if (unlikely(size < MIN_EAGER_BUFFER))
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return 0;
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if (size >
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(type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
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return 0;
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if (encoded)
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*encoded = ilog2(size / PAGE_SIZE) + 1;
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return 1;
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}
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static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
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struct hfi1_packet *packet)
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{
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struct ib_header *rhdr = packet->hdr;
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u32 rte = rhf_rcv_type_err(packet->rhf);
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u32 mlid_base;
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struct hfi1_ibport *ibp = rcd_to_iport(rcd);
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struct hfi1_devdata *dd = ppd->dd;
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struct hfi1_ibdev *verbs_dev = &dd->verbs_dev;
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struct rvt_dev_info *rdi = &verbs_dev->rdi;
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if ((packet->rhf & RHF_DC_ERR) &&
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hfi1_dbg_fault_suppress_err(verbs_dev))
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return;
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if (packet->rhf & RHF_ICRC_ERR)
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return;
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if (packet->etype == RHF_RCV_TYPE_BYPASS) {
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goto drop;
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} else {
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u8 lnh = ib_get_lnh(rhdr);
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mlid_base = be16_to_cpu(IB_MULTICAST_LID_BASE);
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if (lnh == HFI1_LRH_BTH) {
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packet->ohdr = &rhdr->u.oth;
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} else if (lnh == HFI1_LRH_GRH) {
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packet->ohdr = &rhdr->u.l.oth;
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packet->grh = &rhdr->u.l.grh;
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} else {
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goto drop;
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}
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}
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if (packet->rhf & RHF_TID_ERR) {
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/* For TIDERR and RC QPs preemptively schedule a NAK */
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u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
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u32 dlid = ib_get_dlid(rhdr);
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u32 qp_num;
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/* Sanity check packet */
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if (tlen < 24)
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goto drop;
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/* Check for GRH */
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if (packet->grh) {
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u32 vtf;
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struct ib_grh *grh = packet->grh;
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if (grh->next_hdr != IB_GRH_NEXT_HDR)
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goto drop;
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vtf = be32_to_cpu(grh->version_tclass_flow);
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if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
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goto drop;
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}
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/* Get the destination QP number. */
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qp_num = ib_bth_get_qpn(packet->ohdr);
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if (dlid < mlid_base) {
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struct rvt_qp *qp;
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unsigned long flags;
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rcu_read_lock();
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qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
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if (!qp) {
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rcu_read_unlock();
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goto drop;
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}
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/*
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* Handle only RC QPs - for other QP types drop error
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* packet.
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*/
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spin_lock_irqsave(&qp->r_lock, flags);
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/* Check for valid receive state. */
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if (!(ib_rvt_state_ops[qp->state] &
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RVT_PROCESS_RECV_OK)) {
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ibp->rvp.n_pkt_drops++;
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}
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switch (qp->ibqp.qp_type) {
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case IB_QPT_RC:
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hfi1_rc_hdrerr(rcd, packet, qp);
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break;
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default:
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/* For now don't handle any other QP types */
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break;
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}
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spin_unlock_irqrestore(&qp->r_lock, flags);
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rcu_read_unlock();
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} /* Unicast QP */
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} /* Valid packet with TIDErr */
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/* handle "RcvTypeErr" flags */
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switch (rte) {
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case RHF_RTE_ERROR_OP_CODE_ERR:
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{
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void *ebuf = NULL;
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u8 opcode;
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if (rhf_use_egr_bfr(packet->rhf))
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ebuf = packet->ebuf;
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if (!ebuf)
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goto drop; /* this should never happen */
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opcode = ib_bth_get_opcode(packet->ohdr);
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if (opcode == IB_OPCODE_CNP) {
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/*
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* Only in pre-B0 h/w is the CNP_OPCODE handled
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* via this code path.
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*/
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struct rvt_qp *qp = NULL;
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u32 lqpn, rqpn;
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u16 rlid;
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u8 svc_type, sl, sc5;
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sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf);
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sl = ibp->sc_to_sl[sc5];
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lqpn = ib_bth_get_qpn(packet->ohdr);
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rcu_read_lock();
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qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn);
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if (!qp) {
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rcu_read_unlock();
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goto drop;
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}
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switch (qp->ibqp.qp_type) {
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case IB_QPT_UD:
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rlid = 0;
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rqpn = 0;
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svc_type = IB_CC_SVCTYPE_UD;
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break;
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case IB_QPT_UC:
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rlid = ib_get_slid(rhdr);
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rqpn = qp->remote_qpn;
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svc_type = IB_CC_SVCTYPE_UC;
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break;
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default:
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rcu_read_unlock();
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goto drop;
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}
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process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
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rcu_read_unlock();
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}
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packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
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break;
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}
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default:
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break;
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}
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drop:
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return;
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}
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static inline void init_packet(struct hfi1_ctxtdata *rcd,
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struct hfi1_packet *packet)
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{
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packet->rsize = get_hdrqentsize(rcd); /* words */
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packet->maxcnt = get_hdrq_cnt(rcd) * packet->rsize; /* words */
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packet->rcd = rcd;
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packet->updegr = 0;
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packet->etail = -1;
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packet->rhf_addr = get_rhf_addr(rcd);
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packet->rhf = rhf_to_cpu(packet->rhf_addr);
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packet->rhqoff = hfi1_rcd_head(rcd);
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packet->numpkt = 0;
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}
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/* We support only two types - 9B and 16B for now */
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static const hfi1_handle_cnp hfi1_handle_cnp_tbl[2] = {
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[HFI1_PKT_TYPE_9B] = &return_cnp,
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[HFI1_PKT_TYPE_16B] = &return_cnp_16B
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};
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/**
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* hfi1_process_ecn_slowpath - Process FECN or BECN bits
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* @qp: The packet's destination QP
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* @pkt: The packet itself.
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* @prescan: Is the caller the RXQ prescan
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*
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* Process the packet's FECN or BECN bits. By now, the packet
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* has already been evaluated whether processing of those bit should
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* be done.
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* The significance of the @prescan argument is that if the caller
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* is the RXQ prescan, a CNP will be send out instead of waiting for the
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* normal packet processing to send an ACK with BECN set (or a CNP).
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*/
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bool hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
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bool prescan)
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{
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struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
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struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
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struct ib_other_headers *ohdr = pkt->ohdr;
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struct ib_grh *grh = pkt->grh;
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u32 rqpn = 0;
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u16 pkey;
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u32 rlid, slid, dlid = 0;
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u8 hdr_type, sc, svc_type, opcode;
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bool is_mcast = false, ignore_fecn = false, do_cnp = false,
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fecn, becn;
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/* can be called from prescan */
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if (pkt->etype == RHF_RCV_TYPE_BYPASS) {
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pkey = hfi1_16B_get_pkey(pkt->hdr);
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sc = hfi1_16B_get_sc(pkt->hdr);
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dlid = hfi1_16B_get_dlid(pkt->hdr);
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slid = hfi1_16B_get_slid(pkt->hdr);
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is_mcast = hfi1_is_16B_mcast(dlid);
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opcode = ib_bth_get_opcode(ohdr);
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hdr_type = HFI1_PKT_TYPE_16B;
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fecn = hfi1_16B_get_fecn(pkt->hdr);
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|
becn = hfi1_16B_get_becn(pkt->hdr);
|
|
} else {
|
|
pkey = ib_bth_get_pkey(ohdr);
|
|
sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf);
|
|
dlid = qp->ibqp.qp_type != IB_QPT_UD ? ib_get_dlid(pkt->hdr) :
|
|
ppd->lid;
|
|
slid = ib_get_slid(pkt->hdr);
|
|
is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
|
|
(dlid != be16_to_cpu(IB_LID_PERMISSIVE));
|
|
opcode = ib_bth_get_opcode(ohdr);
|
|
hdr_type = HFI1_PKT_TYPE_9B;
|
|
fecn = ib_bth_get_fecn(ohdr);
|
|
becn = ib_bth_get_becn(ohdr);
|
|
}
|
|
|
|
switch (qp->ibqp.qp_type) {
|
|
case IB_QPT_UD:
|
|
rlid = slid;
|
|
rqpn = ib_get_sqpn(pkt->ohdr);
|
|
svc_type = IB_CC_SVCTYPE_UD;
|
|
break;
|
|
case IB_QPT_SMI:
|
|
case IB_QPT_GSI:
|
|
rlid = slid;
|
|
rqpn = ib_get_sqpn(pkt->ohdr);
|
|
svc_type = IB_CC_SVCTYPE_UD;
|
|
break;
|
|
case IB_QPT_UC:
|
|
rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
|
|
rqpn = qp->remote_qpn;
|
|
svc_type = IB_CC_SVCTYPE_UC;
|
|
break;
|
|
case IB_QPT_RC:
|
|
rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
|
|
rqpn = qp->remote_qpn;
|
|
svc_type = IB_CC_SVCTYPE_RC;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
ignore_fecn = is_mcast || (opcode == IB_OPCODE_CNP) ||
|
|
(opcode == IB_OPCODE_RC_ACKNOWLEDGE);
|
|
/*
|
|
* ACKNOWLEDGE packets do not get a CNP but this will be
|
|
* guarded by ignore_fecn above.
|
|
*/
|
|
do_cnp = prescan ||
|
|
(opcode >= IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST &&
|
|
opcode <= IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE) ||
|
|
opcode == TID_OP(READ_RESP) ||
|
|
opcode == TID_OP(ACK);
|
|
|
|
/* Call appropriate CNP handler */
|
|
if (!ignore_fecn && do_cnp && fecn)
|
|
hfi1_handle_cnp_tbl[hdr_type](ibp, qp, rqpn, pkey,
|
|
dlid, rlid, sc, grh);
|
|
|
|
if (becn) {
|
|
u32 lqpn = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK;
|
|
u8 sl = ibp->sc_to_sl[sc];
|
|
|
|
process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
|
|
}
|
|
return !ignore_fecn && fecn;
|
|
}
|
|
|
|
struct ps_mdata {
|
|
struct hfi1_ctxtdata *rcd;
|
|
u32 rsize;
|
|
u32 maxcnt;
|
|
u32 ps_head;
|
|
u32 ps_tail;
|
|
u32 ps_seq;
|
|
};
|
|
|
|
static inline void init_ps_mdata(struct ps_mdata *mdata,
|
|
struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
|
|
mdata->rcd = rcd;
|
|
mdata->rsize = packet->rsize;
|
|
mdata->maxcnt = packet->maxcnt;
|
|
mdata->ps_head = packet->rhqoff;
|
|
|
|
if (get_dma_rtail_setting(rcd)) {
|
|
mdata->ps_tail = get_rcvhdrtail(rcd);
|
|
if (rcd->ctxt == HFI1_CTRL_CTXT)
|
|
mdata->ps_seq = hfi1_seq_cnt(rcd);
|
|
else
|
|
mdata->ps_seq = 0; /* not used with DMA_RTAIL */
|
|
} else {
|
|
mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
|
|
mdata->ps_seq = hfi1_seq_cnt(rcd);
|
|
}
|
|
}
|
|
|
|
static inline int ps_done(struct ps_mdata *mdata, u64 rhf,
|
|
struct hfi1_ctxtdata *rcd)
|
|
{
|
|
if (get_dma_rtail_setting(rcd))
|
|
return mdata->ps_head == mdata->ps_tail;
|
|
return mdata->ps_seq != rhf_rcv_seq(rhf);
|
|
}
|
|
|
|
static inline int ps_skip(struct ps_mdata *mdata, u64 rhf,
|
|
struct hfi1_ctxtdata *rcd)
|
|
{
|
|
/*
|
|
* Control context can potentially receive an invalid rhf.
|
|
* Drop such packets.
|
|
*/
|
|
if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail))
|
|
return mdata->ps_seq != rhf_rcv_seq(rhf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void update_ps_mdata(struct ps_mdata *mdata,
|
|
struct hfi1_ctxtdata *rcd)
|
|
{
|
|
mdata->ps_head += mdata->rsize;
|
|
if (mdata->ps_head >= mdata->maxcnt)
|
|
mdata->ps_head = 0;
|
|
|
|
/* Control context must do seq counting */
|
|
if (!get_dma_rtail_setting(rcd) ||
|
|
rcd->ctxt == HFI1_CTRL_CTXT)
|
|
mdata->ps_seq = hfi1_seq_incr_wrap(mdata->ps_seq);
|
|
}
|
|
|
|
/*
|
|
* prescan_rxq - search through the receive queue looking for packets
|
|
* containing Excplicit Congestion Notifications (FECNs, or BECNs).
|
|
* When an ECN is found, process the Congestion Notification, and toggle
|
|
* it off.
|
|
* This is declared as a macro to allow quick checking of the port to avoid
|
|
* the overhead of a function call if not enabled.
|
|
*/
|
|
#define prescan_rxq(rcd, packet) \
|
|
do { \
|
|
if (rcd->ppd->cc_prescan) \
|
|
__prescan_rxq(packet); \
|
|
} while (0)
|
|
static void __prescan_rxq(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
struct ps_mdata mdata;
|
|
|
|
init_ps_mdata(&mdata, packet);
|
|
|
|
while (1) {
|
|
struct hfi1_ibport *ibp = rcd_to_iport(rcd);
|
|
__le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
|
|
packet->rcd->rhf_offset;
|
|
struct rvt_qp *qp;
|
|
struct ib_header *hdr;
|
|
struct rvt_dev_info *rdi = &rcd->dd->verbs_dev.rdi;
|
|
u64 rhf = rhf_to_cpu(rhf_addr);
|
|
u32 etype = rhf_rcv_type(rhf), qpn, bth1;
|
|
u8 lnh;
|
|
|
|
if (ps_done(&mdata, rhf, rcd))
|
|
break;
|
|
|
|
if (ps_skip(&mdata, rhf, rcd))
|
|
goto next;
|
|
|
|
if (etype != RHF_RCV_TYPE_IB)
|
|
goto next;
|
|
|
|
packet->hdr = hfi1_get_msgheader(packet->rcd, rhf_addr);
|
|
hdr = packet->hdr;
|
|
lnh = ib_get_lnh(hdr);
|
|
|
|
if (lnh == HFI1_LRH_BTH) {
|
|
packet->ohdr = &hdr->u.oth;
|
|
packet->grh = NULL;
|
|
} else if (lnh == HFI1_LRH_GRH) {
|
|
packet->ohdr = &hdr->u.l.oth;
|
|
packet->grh = &hdr->u.l.grh;
|
|
} else {
|
|
goto next; /* just in case */
|
|
}
|
|
|
|
if (!hfi1_may_ecn(packet))
|
|
goto next;
|
|
|
|
bth1 = be32_to_cpu(packet->ohdr->bth[1]);
|
|
qpn = bth1 & RVT_QPN_MASK;
|
|
rcu_read_lock();
|
|
qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn);
|
|
|
|
if (!qp) {
|
|
rcu_read_unlock();
|
|
goto next;
|
|
}
|
|
|
|
hfi1_process_ecn_slowpath(qp, packet, true);
|
|
rcu_read_unlock();
|
|
|
|
/* turn off BECN, FECN */
|
|
bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK);
|
|
packet->ohdr->bth[1] = cpu_to_be32(bth1);
|
|
next:
|
|
update_ps_mdata(&mdata, rcd);
|
|
}
|
|
}
|
|
|
|
static void process_rcv_qp_work(struct hfi1_packet *packet)
|
|
{
|
|
struct rvt_qp *qp, *nqp;
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
|
|
/*
|
|
* Iterate over all QPs waiting to respond.
|
|
* The list won't change since the IRQ is only run on one CPU.
|
|
*/
|
|
list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
|
|
list_del_init(&qp->rspwait);
|
|
if (qp->r_flags & RVT_R_RSP_NAK) {
|
|
qp->r_flags &= ~RVT_R_RSP_NAK;
|
|
packet->qp = qp;
|
|
hfi1_send_rc_ack(packet, 0);
|
|
}
|
|
if (qp->r_flags & RVT_R_RSP_SEND) {
|
|
unsigned long flags;
|
|
|
|
qp->r_flags &= ~RVT_R_RSP_SEND;
|
|
spin_lock_irqsave(&qp->s_lock, flags);
|
|
if (ib_rvt_state_ops[qp->state] &
|
|
RVT_PROCESS_OR_FLUSH_SEND)
|
|
hfi1_schedule_send(qp);
|
|
spin_unlock_irqrestore(&qp->s_lock, flags);
|
|
}
|
|
rvt_put_qp(qp);
|
|
}
|
|
}
|
|
|
|
static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread)
|
|
{
|
|
if (thread) {
|
|
if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0)
|
|
/* allow defered processing */
|
|
process_rcv_qp_work(packet);
|
|
cond_resched();
|
|
return RCV_PKT_OK;
|
|
} else {
|
|
this_cpu_inc(*packet->rcd->dd->rcv_limit);
|
|
return RCV_PKT_LIMIT;
|
|
}
|
|
}
|
|
|
|
static inline int check_max_packet(struct hfi1_packet *packet, int thread)
|
|
{
|
|
int ret = RCV_PKT_OK;
|
|
|
|
if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0))
|
|
ret = max_packet_exceeded(packet, thread);
|
|
return ret;
|
|
}
|
|
|
|
static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread)
|
|
{
|
|
int ret;
|
|
|
|
packet->rcd->dd->ctx0_seq_drop++;
|
|
/* Set up for the next packet */
|
|
packet->rhqoff += packet->rsize;
|
|
if (packet->rhqoff >= packet->maxcnt)
|
|
packet->rhqoff = 0;
|
|
|
|
packet->numpkt++;
|
|
ret = check_max_packet(packet, thread);
|
|
|
|
packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
|
|
packet->rcd->rhf_offset;
|
|
packet->rhf = rhf_to_cpu(packet->rhf_addr);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void process_rcv_packet_napi(struct hfi1_packet *packet)
|
|
{
|
|
packet->etype = rhf_rcv_type(packet->rhf);
|
|
|
|
/* total length */
|
|
packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
|
|
/* retrieve eager buffer details */
|
|
packet->etail = rhf_egr_index(packet->rhf);
|
|
packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
|
|
&packet->updegr);
|
|
/*
|
|
* Prefetch the contents of the eager buffer. It is
|
|
* OK to send a negative length to prefetch_range().
|
|
* The +2 is the size of the RHF.
|
|
*/
|
|
prefetch_range(packet->ebuf,
|
|
packet->tlen - ((packet->rcd->rcvhdrqentsize -
|
|
(rhf_hdrq_offset(packet->rhf)
|
|
+ 2)) * 4));
|
|
|
|
packet->rcd->rhf_rcv_function_map[packet->etype](packet);
|
|
packet->numpkt++;
|
|
|
|
/* Set up for the next packet */
|
|
packet->rhqoff += packet->rsize;
|
|
if (packet->rhqoff >= packet->maxcnt)
|
|
packet->rhqoff = 0;
|
|
|
|
packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
|
|
packet->rcd->rhf_offset;
|
|
packet->rhf = rhf_to_cpu(packet->rhf_addr);
|
|
}
|
|
|
|
static inline int process_rcv_packet(struct hfi1_packet *packet, int thread)
|
|
{
|
|
int ret;
|
|
|
|
packet->etype = rhf_rcv_type(packet->rhf);
|
|
|
|
/* total length */
|
|
packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
|
|
/* retrieve eager buffer details */
|
|
packet->ebuf = NULL;
|
|
if (rhf_use_egr_bfr(packet->rhf)) {
|
|
packet->etail = rhf_egr_index(packet->rhf);
|
|
packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
|
|
&packet->updegr);
|
|
/*
|
|
* Prefetch the contents of the eager buffer. It is
|
|
* OK to send a negative length to prefetch_range().
|
|
* The +2 is the size of the RHF.
|
|
*/
|
|
prefetch_range(packet->ebuf,
|
|
packet->tlen - ((get_hdrqentsize(packet->rcd) -
|
|
(rhf_hdrq_offset(packet->rhf)
|
|
+ 2)) * 4));
|
|
}
|
|
|
|
/*
|
|
* Call a type specific handler for the packet. We
|
|
* should be able to trust that etype won't be beyond
|
|
* the range of valid indexes. If so something is really
|
|
* wrong and we can probably just let things come
|
|
* crashing down. There is no need to eat another
|
|
* comparison in this performance critical code.
|
|
*/
|
|
packet->rcd->rhf_rcv_function_map[packet->etype](packet);
|
|
packet->numpkt++;
|
|
|
|
/* Set up for the next packet */
|
|
packet->rhqoff += packet->rsize;
|
|
if (packet->rhqoff >= packet->maxcnt)
|
|
packet->rhqoff = 0;
|
|
|
|
ret = check_max_packet(packet, thread);
|
|
|
|
packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
|
|
packet->rcd->rhf_offset;
|
|
packet->rhf = rhf_to_cpu(packet->rhf_addr);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void process_rcv_update(int last, struct hfi1_packet *packet)
|
|
{
|
|
/*
|
|
* Update head regs etc., every 16 packets, if not last pkt,
|
|
* to help prevent rcvhdrq overflows, when many packets
|
|
* are processed and queue is nearly full.
|
|
* Don't request an interrupt for intermediate updates.
|
|
*/
|
|
if (!last && !(packet->numpkt & 0xf)) {
|
|
update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
|
|
packet->etail, 0, 0);
|
|
packet->updegr = 0;
|
|
}
|
|
packet->grh = NULL;
|
|
}
|
|
|
|
static inline void finish_packet(struct hfi1_packet *packet)
|
|
{
|
|
/*
|
|
* Nothing we need to free for the packet.
|
|
*
|
|
* The only thing we need to do is a final update and call for an
|
|
* interrupt
|
|
*/
|
|
update_usrhead(packet->rcd, hfi1_rcd_head(packet->rcd), packet->updegr,
|
|
packet->etail, rcv_intr_dynamic, packet->numpkt);
|
|
}
|
|
|
|
/*
|
|
* handle_receive_interrupt_napi_fp - receive a packet
|
|
* @rcd: the context
|
|
* @budget: polling budget
|
|
*
|
|
* Called from interrupt handler for receive interrupt.
|
|
* This is the fast path interrupt handler
|
|
* when executing napi soft irq environment.
|
|
*/
|
|
int handle_receive_interrupt_napi_fp(struct hfi1_ctxtdata *rcd, int budget)
|
|
{
|
|
struct hfi1_packet packet;
|
|
|
|
init_packet(rcd, &packet);
|
|
if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf)))
|
|
goto bail;
|
|
|
|
while (packet.numpkt < budget) {
|
|
process_rcv_packet_napi(&packet);
|
|
if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
|
|
break;
|
|
|
|
process_rcv_update(0, &packet);
|
|
}
|
|
hfi1_set_rcd_head(rcd, packet.rhqoff);
|
|
bail:
|
|
finish_packet(&packet);
|
|
return packet.numpkt;
|
|
}
|
|
|
|
/*
|
|
* Handle receive interrupts when using the no dma rtail option.
|
|
*/
|
|
int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread)
|
|
{
|
|
int last = RCV_PKT_OK;
|
|
struct hfi1_packet packet;
|
|
|
|
init_packet(rcd, &packet);
|
|
if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf))) {
|
|
last = RCV_PKT_DONE;
|
|
goto bail;
|
|
}
|
|
|
|
prescan_rxq(rcd, &packet);
|
|
|
|
while (last == RCV_PKT_OK) {
|
|
last = process_rcv_packet(&packet, thread);
|
|
if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
|
|
last = RCV_PKT_DONE;
|
|
process_rcv_update(last, &packet);
|
|
}
|
|
process_rcv_qp_work(&packet);
|
|
hfi1_set_rcd_head(rcd, packet.rhqoff);
|
|
bail:
|
|
finish_packet(&packet);
|
|
return last;
|
|
}
|
|
|
|
int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread)
|
|
{
|
|
u32 hdrqtail;
|
|
int last = RCV_PKT_OK;
|
|
struct hfi1_packet packet;
|
|
|
|
init_packet(rcd, &packet);
|
|
hdrqtail = get_rcvhdrtail(rcd);
|
|
if (packet.rhqoff == hdrqtail) {
|
|
last = RCV_PKT_DONE;
|
|
goto bail;
|
|
}
|
|
smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
|
|
|
|
prescan_rxq(rcd, &packet);
|
|
|
|
while (last == RCV_PKT_OK) {
|
|
last = process_rcv_packet(&packet, thread);
|
|
if (packet.rhqoff == hdrqtail)
|
|
last = RCV_PKT_DONE;
|
|
process_rcv_update(last, &packet);
|
|
}
|
|
process_rcv_qp_work(&packet);
|
|
hfi1_set_rcd_head(rcd, packet.rhqoff);
|
|
bail:
|
|
finish_packet(&packet);
|
|
return last;
|
|
}
|
|
|
|
static void set_all_fastpath(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
|
|
{
|
|
u16 i;
|
|
|
|
/*
|
|
* For dynamically allocated kernel contexts (like vnic) switch
|
|
* interrupt handler only for that context. Otherwise, switch
|
|
* interrupt handler for all statically allocated kernel contexts.
|
|
*/
|
|
if (rcd->ctxt >= dd->first_dyn_alloc_ctxt && !rcd->is_vnic) {
|
|
hfi1_rcd_get(rcd);
|
|
hfi1_set_fast(rcd);
|
|
hfi1_rcd_put(rcd);
|
|
return;
|
|
}
|
|
|
|
for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
|
|
rcd = hfi1_rcd_get_by_index(dd, i);
|
|
if (rcd && (i < dd->first_dyn_alloc_ctxt || rcd->is_vnic))
|
|
hfi1_set_fast(rcd);
|
|
hfi1_rcd_put(rcd);
|
|
}
|
|
}
|
|
|
|
void set_all_slowpath(struct hfi1_devdata *dd)
|
|
{
|
|
struct hfi1_ctxtdata *rcd;
|
|
u16 i;
|
|
|
|
/* HFI1_CTRL_CTXT must always use the slow path interrupt handler */
|
|
for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
|
|
rcd = hfi1_rcd_get_by_index(dd, i);
|
|
if (!rcd)
|
|
continue;
|
|
if (i < dd->first_dyn_alloc_ctxt || rcd->is_vnic)
|
|
rcd->do_interrupt = rcd->slow_handler;
|
|
|
|
hfi1_rcd_put(rcd);
|
|
}
|
|
}
|
|
|
|
static bool __set_armed_to_active(struct hfi1_packet *packet)
|
|
{
|
|
u8 etype = rhf_rcv_type(packet->rhf);
|
|
u8 sc = SC15_PACKET;
|
|
|
|
if (etype == RHF_RCV_TYPE_IB) {
|
|
struct ib_header *hdr = hfi1_get_msgheader(packet->rcd,
|
|
packet->rhf_addr);
|
|
sc = hfi1_9B_get_sc5(hdr, packet->rhf);
|
|
} else if (etype == RHF_RCV_TYPE_BYPASS) {
|
|
struct hfi1_16b_header *hdr = hfi1_get_16B_header(
|
|
packet->rcd,
|
|
packet->rhf_addr);
|
|
sc = hfi1_16B_get_sc(hdr);
|
|
}
|
|
if (sc != SC15_PACKET) {
|
|
int hwstate = driver_lstate(packet->rcd->ppd);
|
|
struct work_struct *lsaw =
|
|
&packet->rcd->ppd->linkstate_active_work;
|
|
|
|
if (hwstate != IB_PORT_ACTIVE) {
|
|
dd_dev_info(packet->rcd->dd,
|
|
"Unexpected link state %s\n",
|
|
opa_lstate_name(hwstate));
|
|
return false;
|
|
}
|
|
|
|
queue_work(packet->rcd->ppd->link_wq, lsaw);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* armed to active - the fast path for armed to active
|
|
* @packet: the packet structure
|
|
*
|
|
* Return true if packet processing needs to bail.
|
|
*/
|
|
static bool set_armed_to_active(struct hfi1_packet *packet)
|
|
{
|
|
if (likely(packet->rcd->ppd->host_link_state != HLS_UP_ARMED))
|
|
return false;
|
|
return __set_armed_to_active(packet);
|
|
}
|
|
|
|
/*
|
|
* handle_receive_interrupt - receive a packet
|
|
* @rcd: the context
|
|
*
|
|
* Called from interrupt handler for errors or receive interrupt.
|
|
* This is the slow path interrupt handler.
|
|
*/
|
|
int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread)
|
|
{
|
|
struct hfi1_devdata *dd = rcd->dd;
|
|
u32 hdrqtail;
|
|
int needset, last = RCV_PKT_OK;
|
|
struct hfi1_packet packet;
|
|
int skip_pkt = 0;
|
|
|
|
/* Control context will always use the slow path interrupt handler */
|
|
needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1;
|
|
|
|
init_packet(rcd, &packet);
|
|
|
|
if (!get_dma_rtail_setting(rcd)) {
|
|
if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf))) {
|
|
last = RCV_PKT_DONE;
|
|
goto bail;
|
|
}
|
|
hdrqtail = 0;
|
|
} else {
|
|
hdrqtail = get_rcvhdrtail(rcd);
|
|
if (packet.rhqoff == hdrqtail) {
|
|
last = RCV_PKT_DONE;
|
|
goto bail;
|
|
}
|
|
smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
|
|
|
|
/*
|
|
* Control context can potentially receive an invalid
|
|
* rhf. Drop such packets.
|
|
*/
|
|
if (rcd->ctxt == HFI1_CTRL_CTXT)
|
|
if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf)))
|
|
skip_pkt = 1;
|
|
}
|
|
|
|
prescan_rxq(rcd, &packet);
|
|
|
|
while (last == RCV_PKT_OK) {
|
|
if (hfi1_need_drop(dd)) {
|
|
/* On to the next packet */
|
|
packet.rhqoff += packet.rsize;
|
|
packet.rhf_addr = (__le32 *)rcd->rcvhdrq +
|
|
packet.rhqoff +
|
|
rcd->rhf_offset;
|
|
packet.rhf = rhf_to_cpu(packet.rhf_addr);
|
|
|
|
} else if (skip_pkt) {
|
|
last = skip_rcv_packet(&packet, thread);
|
|
skip_pkt = 0;
|
|
} else {
|
|
if (set_armed_to_active(&packet))
|
|
goto bail;
|
|
last = process_rcv_packet(&packet, thread);
|
|
}
|
|
|
|
if (!get_dma_rtail_setting(rcd)) {
|
|
if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
|
|
last = RCV_PKT_DONE;
|
|
} else {
|
|
if (packet.rhqoff == hdrqtail)
|
|
last = RCV_PKT_DONE;
|
|
/*
|
|
* Control context can potentially receive an invalid
|
|
* rhf. Drop such packets.
|
|
*/
|
|
if (rcd->ctxt == HFI1_CTRL_CTXT) {
|
|
bool lseq;
|
|
|
|
lseq = hfi1_seq_incr(rcd,
|
|
rhf_rcv_seq(packet.rhf));
|
|
if (!last && lseq)
|
|
skip_pkt = 1;
|
|
}
|
|
}
|
|
|
|
if (needset) {
|
|
needset = false;
|
|
set_all_fastpath(dd, rcd);
|
|
}
|
|
process_rcv_update(last, &packet);
|
|
}
|
|
|
|
process_rcv_qp_work(&packet);
|
|
hfi1_set_rcd_head(rcd, packet.rhqoff);
|
|
|
|
bail:
|
|
/*
|
|
* Always write head at end, and setup rcv interrupt, even
|
|
* if no packets were processed.
|
|
*/
|
|
finish_packet(&packet);
|
|
return last;
|
|
}
|
|
|
|
/*
|
|
* handle_receive_interrupt_napi_sp - receive a packet
|
|
* @rcd: the context
|
|
* @budget: polling budget
|
|
*
|
|
* Called from interrupt handler for errors or receive interrupt.
|
|
* This is the slow path interrupt handler
|
|
* when executing napi soft irq environment.
|
|
*/
|
|
int handle_receive_interrupt_napi_sp(struct hfi1_ctxtdata *rcd, int budget)
|
|
{
|
|
struct hfi1_devdata *dd = rcd->dd;
|
|
int last = RCV_PKT_OK;
|
|
bool needset = true;
|
|
struct hfi1_packet packet;
|
|
|
|
init_packet(rcd, &packet);
|
|
if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf)))
|
|
goto bail;
|
|
|
|
while (last != RCV_PKT_DONE && packet.numpkt < budget) {
|
|
if (hfi1_need_drop(dd)) {
|
|
/* On to the next packet */
|
|
packet.rhqoff += packet.rsize;
|
|
packet.rhf_addr = (__le32 *)rcd->rcvhdrq +
|
|
packet.rhqoff +
|
|
rcd->rhf_offset;
|
|
packet.rhf = rhf_to_cpu(packet.rhf_addr);
|
|
|
|
} else {
|
|
if (set_armed_to_active(&packet))
|
|
goto bail;
|
|
process_rcv_packet_napi(&packet);
|
|
}
|
|
|
|
if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
|
|
last = RCV_PKT_DONE;
|
|
|
|
if (needset) {
|
|
needset = false;
|
|
set_all_fastpath(dd, rcd);
|
|
}
|
|
|
|
process_rcv_update(last, &packet);
|
|
}
|
|
|
|
hfi1_set_rcd_head(rcd, packet.rhqoff);
|
|
|
|
bail:
|
|
/*
|
|
* Always write head at end, and setup rcv interrupt, even
|
|
* if no packets were processed.
|
|
*/
|
|
finish_packet(&packet);
|
|
return packet.numpkt;
|
|
}
|
|
|
|
/*
|
|
* We may discover in the interrupt that the hardware link state has
|
|
* changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet),
|
|
* and we need to update the driver's notion of the link state. We cannot
|
|
* run set_link_state from interrupt context, so we queue this function on
|
|
* a workqueue.
|
|
*
|
|
* We delay the regular interrupt processing until after the state changes
|
|
* so that the link will be in the correct state by the time any application
|
|
* we wake up attempts to send a reply to any message it received.
|
|
* (Subsequent receive interrupts may possibly force the wakeup before we
|
|
* update the link state.)
|
|
*
|
|
* The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes
|
|
* dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues,
|
|
* so we're safe from use-after-free of the rcd.
|
|
*/
|
|
void receive_interrupt_work(struct work_struct *work)
|
|
{
|
|
struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
|
|
linkstate_active_work);
|
|
struct hfi1_devdata *dd = ppd->dd;
|
|
struct hfi1_ctxtdata *rcd;
|
|
u16 i;
|
|
|
|
/* Received non-SC15 packet implies neighbor_normal */
|
|
ppd->neighbor_normal = 1;
|
|
set_link_state(ppd, HLS_UP_ACTIVE);
|
|
|
|
/*
|
|
* Interrupt all statically allocated kernel contexts that could
|
|
* have had an interrupt during auto activation.
|
|
*/
|
|
for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) {
|
|
rcd = hfi1_rcd_get_by_index(dd, i);
|
|
if (rcd)
|
|
force_recv_intr(rcd);
|
|
hfi1_rcd_put(rcd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Convert a given MTU size to the on-wire MAD packet enumeration.
|
|
* Return -1 if the size is invalid.
|
|
*/
|
|
int mtu_to_enum(u32 mtu, int default_if_bad)
|
|
{
|
|
switch (mtu) {
|
|
case 0: return OPA_MTU_0;
|
|
case 256: return OPA_MTU_256;
|
|
case 512: return OPA_MTU_512;
|
|
case 1024: return OPA_MTU_1024;
|
|
case 2048: return OPA_MTU_2048;
|
|
case 4096: return OPA_MTU_4096;
|
|
case 8192: return OPA_MTU_8192;
|
|
case 10240: return OPA_MTU_10240;
|
|
}
|
|
return default_if_bad;
|
|
}
|
|
|
|
u16 enum_to_mtu(int mtu)
|
|
{
|
|
switch (mtu) {
|
|
case OPA_MTU_0: return 0;
|
|
case OPA_MTU_256: return 256;
|
|
case OPA_MTU_512: return 512;
|
|
case OPA_MTU_1024: return 1024;
|
|
case OPA_MTU_2048: return 2048;
|
|
case OPA_MTU_4096: return 4096;
|
|
case OPA_MTU_8192: return 8192;
|
|
case OPA_MTU_10240: return 10240;
|
|
default: return 0xffff;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* set_mtu - set the MTU
|
|
* @ppd: the per port data
|
|
*
|
|
* We can handle "any" incoming size, the issue here is whether we
|
|
* need to restrict our outgoing size. We do not deal with what happens
|
|
* to programs that are already running when the size changes.
|
|
*/
|
|
int set_mtu(struct hfi1_pportdata *ppd)
|
|
{
|
|
struct hfi1_devdata *dd = ppd->dd;
|
|
int i, drain, ret = 0, is_up = 0;
|
|
|
|
ppd->ibmtu = 0;
|
|
for (i = 0; i < ppd->vls_supported; i++)
|
|
if (ppd->ibmtu < dd->vld[i].mtu)
|
|
ppd->ibmtu = dd->vld[i].mtu;
|
|
ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
|
|
|
|
mutex_lock(&ppd->hls_lock);
|
|
if (ppd->host_link_state == HLS_UP_INIT ||
|
|
ppd->host_link_state == HLS_UP_ARMED ||
|
|
ppd->host_link_state == HLS_UP_ACTIVE)
|
|
is_up = 1;
|
|
|
|
drain = !is_ax(dd) && is_up;
|
|
|
|
if (drain)
|
|
/*
|
|
* MTU is specified per-VL. To ensure that no packet gets
|
|
* stuck (due, e.g., to the MTU for the packet's VL being
|
|
* reduced), empty the per-VL FIFOs before adjusting MTU.
|
|
*/
|
|
ret = stop_drain_data_vls(dd);
|
|
|
|
if (ret) {
|
|
dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
|
|
__func__);
|
|
goto err;
|
|
}
|
|
|
|
hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
|
|
|
|
if (drain)
|
|
open_fill_data_vls(dd); /* reopen all VLs */
|
|
|
|
err:
|
|
mutex_unlock(&ppd->hls_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
|
|
{
|
|
struct hfi1_devdata *dd = ppd->dd;
|
|
|
|
ppd->lid = lid;
|
|
ppd->lmc = lmc;
|
|
hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
|
|
|
|
dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void shutdown_led_override(struct hfi1_pportdata *ppd)
|
|
{
|
|
struct hfi1_devdata *dd = ppd->dd;
|
|
|
|
/*
|
|
* This pairs with the memory barrier in hfi1_start_led_override to
|
|
* ensure that we read the correct state of LED beaconing represented
|
|
* by led_override_timer_active
|
|
*/
|
|
smp_rmb();
|
|
if (atomic_read(&ppd->led_override_timer_active)) {
|
|
del_timer_sync(&ppd->led_override_timer);
|
|
atomic_set(&ppd->led_override_timer_active, 0);
|
|
/* Ensure the atomic_set is visible to all CPUs */
|
|
smp_wmb();
|
|
}
|
|
|
|
/* Hand control of the LED to the DC for normal operation */
|
|
write_csr(dd, DCC_CFG_LED_CNTRL, 0);
|
|
}
|
|
|
|
static void run_led_override(struct timer_list *t)
|
|
{
|
|
struct hfi1_pportdata *ppd = from_timer(ppd, t, led_override_timer);
|
|
struct hfi1_devdata *dd = ppd->dd;
|
|
unsigned long timeout;
|
|
int phase_idx;
|
|
|
|
if (!(dd->flags & HFI1_INITTED))
|
|
return;
|
|
|
|
phase_idx = ppd->led_override_phase & 1;
|
|
|
|
setextled(dd, phase_idx);
|
|
|
|
timeout = ppd->led_override_vals[phase_idx];
|
|
|
|
/* Set up for next phase */
|
|
ppd->led_override_phase = !ppd->led_override_phase;
|
|
|
|
mod_timer(&ppd->led_override_timer, jiffies + timeout);
|
|
}
|
|
|
|
/*
|
|
* To have the LED blink in a particular pattern, provide timeon and timeoff
|
|
* in milliseconds.
|
|
* To turn off custom blinking and return to normal operation, use
|
|
* shutdown_led_override()
|
|
*/
|
|
void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon,
|
|
unsigned int timeoff)
|
|
{
|
|
if (!(ppd->dd->flags & HFI1_INITTED))
|
|
return;
|
|
|
|
/* Convert to jiffies for direct use in timer */
|
|
ppd->led_override_vals[0] = msecs_to_jiffies(timeoff);
|
|
ppd->led_override_vals[1] = msecs_to_jiffies(timeon);
|
|
|
|
/* Arbitrarily start from LED on phase */
|
|
ppd->led_override_phase = 1;
|
|
|
|
/*
|
|
* If the timer has not already been started, do so. Use a "quick"
|
|
* timeout so the handler will be called soon to look at our request.
|
|
*/
|
|
if (!timer_pending(&ppd->led_override_timer)) {
|
|
timer_setup(&ppd->led_override_timer, run_led_override, 0);
|
|
ppd->led_override_timer.expires = jiffies + 1;
|
|
add_timer(&ppd->led_override_timer);
|
|
atomic_set(&ppd->led_override_timer_active, 1);
|
|
/* Ensure the atomic_set is visible to all CPUs */
|
|
smp_wmb();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* hfi1_reset_device - reset the chip if possible
|
|
* @unit: the device to reset
|
|
*
|
|
* Whether or not reset is successful, we attempt to re-initialize the chip
|
|
* (that is, much like a driver unload/reload). We clear the INITTED flag
|
|
* so that the various entry points will fail until we reinitialize. For
|
|
* now, we only allow this if no user contexts are open that use chip resources
|
|
*/
|
|
int hfi1_reset_device(int unit)
|
|
{
|
|
int ret;
|
|
struct hfi1_devdata *dd = hfi1_lookup(unit);
|
|
struct hfi1_pportdata *ppd;
|
|
int pidx;
|
|
|
|
if (!dd) {
|
|
ret = -ENODEV;
|
|
goto bail;
|
|
}
|
|
|
|
dd_dev_info(dd, "Reset on unit %u requested\n", unit);
|
|
|
|
if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) {
|
|
dd_dev_info(dd,
|
|
"Invalid unit number %u or not initialized or not present\n",
|
|
unit);
|
|
ret = -ENXIO;
|
|
goto bail;
|
|
}
|
|
|
|
/* If there are any user/vnic contexts, we cannot reset */
|
|
mutex_lock(&hfi1_mutex);
|
|
if (dd->rcd)
|
|
if (hfi1_stats.sps_ctxts) {
|
|
mutex_unlock(&hfi1_mutex);
|
|
ret = -EBUSY;
|
|
goto bail;
|
|
}
|
|
mutex_unlock(&hfi1_mutex);
|
|
|
|
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
|
|
ppd = dd->pport + pidx;
|
|
|
|
shutdown_led_override(ppd);
|
|
}
|
|
if (dd->flags & HFI1_HAS_SEND_DMA)
|
|
sdma_exit(dd);
|
|
|
|
hfi1_reset_cpu_counters(dd);
|
|
|
|
ret = hfi1_init(dd, 1);
|
|
|
|
if (ret)
|
|
dd_dev_err(dd,
|
|
"Reinitialize unit %u after reset failed with %d\n",
|
|
unit, ret);
|
|
else
|
|
dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
|
|
unit);
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
static inline void hfi1_setup_ib_header(struct hfi1_packet *packet)
|
|
{
|
|
packet->hdr = (struct hfi1_ib_message_header *)
|
|
hfi1_get_msgheader(packet->rcd,
|
|
packet->rhf_addr);
|
|
packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
|
|
}
|
|
|
|
static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_pportdata *ppd = packet->rcd->ppd;
|
|
|
|
/* slid and dlid cannot be 0 */
|
|
if ((!packet->slid) || (!packet->dlid))
|
|
return -EINVAL;
|
|
|
|
/* Compare port lid with incoming packet dlid */
|
|
if ((!(hfi1_is_16B_mcast(packet->dlid))) &&
|
|
(packet->dlid !=
|
|
opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) {
|
|
if ((packet->dlid & ~((1 << ppd->lmc) - 1)) != ppd->lid)
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* No multicast packets with SC15 */
|
|
if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF))
|
|
return -EINVAL;
|
|
|
|
/* Packets with permissive DLID always on SC15 */
|
|
if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE),
|
|
16B)) &&
|
|
(packet->sc != 0xF))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
|
|
struct ib_header *hdr;
|
|
u8 lnh;
|
|
|
|
hfi1_setup_ib_header(packet);
|
|
hdr = packet->hdr;
|
|
|
|
lnh = ib_get_lnh(hdr);
|
|
if (lnh == HFI1_LRH_BTH) {
|
|
packet->ohdr = &hdr->u.oth;
|
|
packet->grh = NULL;
|
|
} else if (lnh == HFI1_LRH_GRH) {
|
|
u32 vtf;
|
|
|
|
packet->ohdr = &hdr->u.l.oth;
|
|
packet->grh = &hdr->u.l.grh;
|
|
if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
|
|
goto drop;
|
|
vtf = be32_to_cpu(packet->grh->version_tclass_flow);
|
|
if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
|
|
goto drop;
|
|
} else {
|
|
goto drop;
|
|
}
|
|
|
|
/* Query commonly used fields from packet header */
|
|
packet->payload = packet->ebuf;
|
|
packet->opcode = ib_bth_get_opcode(packet->ohdr);
|
|
packet->slid = ib_get_slid(hdr);
|
|
packet->dlid = ib_get_dlid(hdr);
|
|
if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
|
|
(packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE))))
|
|
packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
|
|
be16_to_cpu(IB_MULTICAST_LID_BASE);
|
|
packet->sl = ib_get_sl(hdr);
|
|
packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
|
|
packet->pad = ib_bth_get_pad(packet->ohdr);
|
|
packet->extra_byte = 0;
|
|
packet->pkey = ib_bth_get_pkey(packet->ohdr);
|
|
packet->migrated = ib_bth_is_migration(packet->ohdr);
|
|
|
|
return 0;
|
|
drop:
|
|
ibp->rvp.n_pkt_drops++;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
|
|
{
|
|
/*
|
|
* Bypass packets have a different header/payload split
|
|
* compared to an IB packet.
|
|
* Current split is set such that 16 bytes of the actual
|
|
* header is in the header buffer and the remining is in
|
|
* the eager buffer. We chose 16 since hfi1 driver only
|
|
* supports 16B bypass packets and we will be able to
|
|
* receive the entire LRH with such a split.
|
|
*/
|
|
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
struct hfi1_pportdata *ppd = rcd->ppd;
|
|
struct hfi1_ibport *ibp = &ppd->ibport_data;
|
|
u8 l4;
|
|
|
|
packet->hdr = (struct hfi1_16b_header *)
|
|
hfi1_get_16B_header(packet->rcd,
|
|
packet->rhf_addr);
|
|
l4 = hfi1_16B_get_l4(packet->hdr);
|
|
if (l4 == OPA_16B_L4_IB_LOCAL) {
|
|
packet->ohdr = packet->ebuf;
|
|
packet->grh = NULL;
|
|
packet->opcode = ib_bth_get_opcode(packet->ohdr);
|
|
packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
|
|
/* hdr_len_by_opcode already has an IB LRH factored in */
|
|
packet->hlen = hdr_len_by_opcode[packet->opcode] +
|
|
(LRH_16B_BYTES - LRH_9B_BYTES);
|
|
packet->migrated = opa_bth_is_migration(packet->ohdr);
|
|
} else if (l4 == OPA_16B_L4_IB_GLOBAL) {
|
|
u32 vtf;
|
|
u8 grh_len = sizeof(struct ib_grh);
|
|
|
|
packet->ohdr = packet->ebuf + grh_len;
|
|
packet->grh = packet->ebuf;
|
|
packet->opcode = ib_bth_get_opcode(packet->ohdr);
|
|
packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
|
|
/* hdr_len_by_opcode already has an IB LRH factored in */
|
|
packet->hlen = hdr_len_by_opcode[packet->opcode] +
|
|
(LRH_16B_BYTES - LRH_9B_BYTES) + grh_len;
|
|
packet->migrated = opa_bth_is_migration(packet->ohdr);
|
|
|
|
if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
|
|
goto drop;
|
|
vtf = be32_to_cpu(packet->grh->version_tclass_flow);
|
|
if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
|
|
goto drop;
|
|
} else if (l4 == OPA_16B_L4_FM) {
|
|
packet->mgmt = packet->ebuf;
|
|
packet->ohdr = NULL;
|
|
packet->grh = NULL;
|
|
packet->opcode = IB_OPCODE_UD_SEND_ONLY;
|
|
packet->pad = OPA_16B_L4_FM_PAD;
|
|
packet->hlen = OPA_16B_L4_FM_HLEN;
|
|
packet->migrated = false;
|
|
} else {
|
|
goto drop;
|
|
}
|
|
|
|
/* Query commonly used fields from packet header */
|
|
packet->payload = packet->ebuf + packet->hlen - LRH_16B_BYTES;
|
|
packet->slid = hfi1_16B_get_slid(packet->hdr);
|
|
packet->dlid = hfi1_16B_get_dlid(packet->hdr);
|
|
if (unlikely(hfi1_is_16B_mcast(packet->dlid)))
|
|
packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
|
|
opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR),
|
|
16B);
|
|
packet->sc = hfi1_16B_get_sc(packet->hdr);
|
|
packet->sl = ibp->sc_to_sl[packet->sc];
|
|
packet->extra_byte = SIZE_OF_LT;
|
|
packet->pkey = hfi1_16B_get_pkey(packet->hdr);
|
|
|
|
if (hfi1_bypass_ingress_pkt_check(packet))
|
|
goto drop;
|
|
|
|
return 0;
|
|
drop:
|
|
hfi1_cdbg(PKT, "%s: packet dropped\n", __func__);
|
|
ibp->rvp.n_pkt_drops++;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void show_eflags_errs(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
u32 rte = rhf_rcv_type_err(packet->rhf);
|
|
|
|
dd_dev_err(rcd->dd,
|
|
"receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s] rte 0x%x\n",
|
|
rcd->ctxt, packet->rhf,
|
|
packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
|
|
packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
|
|
packet->rhf & RHF_DC_ERR ? "dc " : "",
|
|
packet->rhf & RHF_TID_ERR ? "tid " : "",
|
|
packet->rhf & RHF_LEN_ERR ? "len " : "",
|
|
packet->rhf & RHF_ECC_ERR ? "ecc " : "",
|
|
packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
|
|
rte);
|
|
}
|
|
|
|
void handle_eflags(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
|
|
rcv_hdrerr(rcd, rcd->ppd, packet);
|
|
if (rhf_err_flags(packet->rhf))
|
|
show_eflags_errs(packet);
|
|
}
|
|
|
|
static void hfi1_ipoib_ib_rcv(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_ibport *ibp;
|
|
struct net_device *netdev;
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
struct napi_struct *napi = rcd->napi;
|
|
struct sk_buff *skb;
|
|
struct hfi1_netdev_rxq *rxq = container_of(napi,
|
|
struct hfi1_netdev_rxq, napi);
|
|
u32 extra_bytes;
|
|
u32 tlen, qpnum;
|
|
bool do_work, do_cnp;
|
|
struct hfi1_ipoib_dev_priv *priv;
|
|
|
|
trace_hfi1_rcvhdr(packet);
|
|
|
|
hfi1_setup_ib_header(packet);
|
|
|
|
packet->ohdr = &((struct ib_header *)packet->hdr)->u.oth;
|
|
packet->grh = NULL;
|
|
|
|
if (unlikely(rhf_err_flags(packet->rhf))) {
|
|
handle_eflags(packet);
|
|
return;
|
|
}
|
|
|
|
qpnum = ib_bth_get_qpn(packet->ohdr);
|
|
netdev = hfi1_netdev_get_data(rcd->dd, qpnum);
|
|
if (!netdev)
|
|
goto drop_no_nd;
|
|
|
|
trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
|
|
trace_ctxt_rsm_hist(rcd->ctxt);
|
|
|
|
/* handle congestion notifications */
|
|
do_work = hfi1_may_ecn(packet);
|
|
if (unlikely(do_work)) {
|
|
do_cnp = (packet->opcode != IB_OPCODE_CNP);
|
|
(void)hfi1_process_ecn_slowpath(hfi1_ipoib_priv(netdev)->qp,
|
|
packet, do_cnp);
|
|
}
|
|
|
|
/*
|
|
* We have split point after last byte of DETH
|
|
* lets strip padding and CRC and ICRC.
|
|
* tlen is whole packet len so we need to
|
|
* subtract header size as well.
|
|
*/
|
|
tlen = packet->tlen;
|
|
extra_bytes = ib_bth_get_pad(packet->ohdr) + (SIZE_OF_CRC << 2) +
|
|
packet->hlen;
|
|
if (unlikely(tlen < extra_bytes))
|
|
goto drop;
|
|
|
|
tlen -= extra_bytes;
|
|
|
|
skb = hfi1_ipoib_prepare_skb(rxq, tlen, packet->ebuf);
|
|
if (unlikely(!skb))
|
|
goto drop;
|
|
|
|
priv = hfi1_ipoib_priv(netdev);
|
|
hfi1_ipoib_update_rx_netstats(priv, 1, skb->len);
|
|
|
|
skb->dev = netdev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
netif_receive_skb(skb);
|
|
|
|
return;
|
|
|
|
drop:
|
|
++netdev->stats.rx_dropped;
|
|
drop_no_nd:
|
|
ibp = rcd_to_iport(packet->rcd);
|
|
++ibp->rvp.n_pkt_drops;
|
|
}
|
|
|
|
/*
|
|
* The following functions are called by the interrupt handler. They are type
|
|
* specific handlers for each packet type.
|
|
*/
|
|
static void process_receive_ib(struct hfi1_packet *packet)
|
|
{
|
|
if (hfi1_setup_9B_packet(packet))
|
|
return;
|
|
|
|
if (unlikely(hfi1_dbg_should_fault_rx(packet)))
|
|
return;
|
|
|
|
trace_hfi1_rcvhdr(packet);
|
|
|
|
if (unlikely(rhf_err_flags(packet->rhf))) {
|
|
handle_eflags(packet);
|
|
return;
|
|
}
|
|
|
|
hfi1_ib_rcv(packet);
|
|
}
|
|
|
|
static void process_receive_bypass(struct hfi1_packet *packet)
|
|
{
|
|
struct hfi1_devdata *dd = packet->rcd->dd;
|
|
|
|
if (hfi1_setup_bypass_packet(packet))
|
|
return;
|
|
|
|
trace_hfi1_rcvhdr(packet);
|
|
|
|
if (unlikely(rhf_err_flags(packet->rhf))) {
|
|
handle_eflags(packet);
|
|
return;
|
|
}
|
|
|
|
if (hfi1_16B_get_l2(packet->hdr) == 0x2) {
|
|
hfi1_16B_rcv(packet);
|
|
} else {
|
|
dd_dev_err(dd,
|
|
"Bypass packets other than 16B are not supported in normal operation. Dropping\n");
|
|
incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
|
|
if (!(dd->err_info_rcvport.status_and_code &
|
|
OPA_EI_STATUS_SMASK)) {
|
|
u64 *flits = packet->ebuf;
|
|
|
|
if (flits && !(packet->rhf & RHF_LEN_ERR)) {
|
|
dd->err_info_rcvport.packet_flit1 = flits[0];
|
|
dd->err_info_rcvport.packet_flit2 =
|
|
packet->tlen > sizeof(flits[0]) ?
|
|
flits[1] : 0;
|
|
}
|
|
dd->err_info_rcvport.status_and_code |=
|
|
(OPA_EI_STATUS_SMASK | BAD_L2_ERR);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void process_receive_error(struct hfi1_packet *packet)
|
|
{
|
|
/* KHdrHCRCErr -- KDETH packet with a bad HCRC */
|
|
if (unlikely(
|
|
hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
|
|
(rhf_rcv_type_err(packet->rhf) == RHF_RCV_TYPE_ERROR ||
|
|
packet->rhf & RHF_DC_ERR)))
|
|
return;
|
|
|
|
hfi1_setup_ib_header(packet);
|
|
handle_eflags(packet);
|
|
|
|
if (unlikely(rhf_err_flags(packet->rhf)))
|
|
dd_dev_err(packet->rcd->dd,
|
|
"Unhandled error packet received. Dropping.\n");
|
|
}
|
|
|
|
static void kdeth_process_expected(struct hfi1_packet *packet)
|
|
{
|
|
hfi1_setup_9B_packet(packet);
|
|
if (unlikely(hfi1_dbg_should_fault_rx(packet)))
|
|
return;
|
|
|
|
if (unlikely(rhf_err_flags(packet->rhf))) {
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
|
|
if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
|
|
return;
|
|
}
|
|
|
|
hfi1_kdeth_expected_rcv(packet);
|
|
}
|
|
|
|
static void kdeth_process_eager(struct hfi1_packet *packet)
|
|
{
|
|
hfi1_setup_9B_packet(packet);
|
|
if (unlikely(hfi1_dbg_should_fault_rx(packet)))
|
|
return;
|
|
|
|
trace_hfi1_rcvhdr(packet);
|
|
if (unlikely(rhf_err_flags(packet->rhf))) {
|
|
struct hfi1_ctxtdata *rcd = packet->rcd;
|
|
|
|
show_eflags_errs(packet);
|
|
if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
|
|
return;
|
|
}
|
|
|
|
hfi1_kdeth_eager_rcv(packet);
|
|
}
|
|
|
|
static void process_receive_invalid(struct hfi1_packet *packet)
|
|
{
|
|
dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
|
|
rhf_rcv_type(packet->rhf));
|
|
}
|
|
|
|
#define HFI1_RCVHDR_DUMP_MAX 5
|
|
|
|
void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)
|
|
{
|
|
struct hfi1_packet packet;
|
|
struct ps_mdata mdata;
|
|
int i;
|
|
|
|
seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s ctrl 0x%08llx status 0x%08llx, head %llu tail %llu sw head %u\n",
|
|
rcd->ctxt, get_hdrq_cnt(rcd), get_hdrqentsize(rcd),
|
|
get_dma_rtail_setting(rcd) ?
|
|
"dma_rtail" : "nodma_rtail",
|
|
read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_CTRL),
|
|
read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_STATUS),
|
|
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &
|
|
RCV_HDR_HEAD_HEAD_MASK,
|
|
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL),
|
|
rcd->head);
|
|
|
|
init_packet(rcd, &packet);
|
|
init_ps_mdata(&mdata, &packet);
|
|
|
|
for (i = 0; i < HFI1_RCVHDR_DUMP_MAX; i++) {
|
|
__le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
|
|
rcd->rhf_offset;
|
|
struct ib_header *hdr;
|
|
u64 rhf = rhf_to_cpu(rhf_addr);
|
|
u32 etype = rhf_rcv_type(rhf), qpn;
|
|
u8 opcode;
|
|
u32 psn;
|
|
u8 lnh;
|
|
|
|
if (ps_done(&mdata, rhf, rcd))
|
|
break;
|
|
|
|
if (ps_skip(&mdata, rhf, rcd))
|
|
goto next;
|
|
|
|
if (etype > RHF_RCV_TYPE_IB)
|
|
goto next;
|
|
|
|
packet.hdr = hfi1_get_msgheader(rcd, rhf_addr);
|
|
hdr = packet.hdr;
|
|
|
|
lnh = be16_to_cpu(hdr->lrh[0]) & 3;
|
|
|
|
if (lnh == HFI1_LRH_BTH)
|
|
packet.ohdr = &hdr->u.oth;
|
|
else if (lnh == HFI1_LRH_GRH)
|
|
packet.ohdr = &hdr->u.l.oth;
|
|
else
|
|
goto next; /* just in case */
|
|
|
|
opcode = (be32_to_cpu(packet.ohdr->bth[0]) >> 24);
|
|
qpn = be32_to_cpu(packet.ohdr->bth[1]) & RVT_QPN_MASK;
|
|
psn = mask_psn(be32_to_cpu(packet.ohdr->bth[2]));
|
|
|
|
seq_printf(s, "\tEnt %u: opcode 0x%x, qpn 0x%x, psn 0x%x\n",
|
|
mdata.ps_head, opcode, qpn, psn);
|
|
next:
|
|
update_ps_mdata(&mdata, rcd);
|
|
}
|
|
}
|
|
|
|
const rhf_rcv_function_ptr normal_rhf_rcv_functions[] = {
|
|
[RHF_RCV_TYPE_EXPECTED] = kdeth_process_expected,
|
|
[RHF_RCV_TYPE_EAGER] = kdeth_process_eager,
|
|
[RHF_RCV_TYPE_IB] = process_receive_ib,
|
|
[RHF_RCV_TYPE_ERROR] = process_receive_error,
|
|
[RHF_RCV_TYPE_BYPASS] = process_receive_bypass,
|
|
[RHF_RCV_TYPE_INVALID5] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_INVALID6] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_INVALID7] = process_receive_invalid,
|
|
};
|
|
|
|
const rhf_rcv_function_ptr netdev_rhf_rcv_functions[] = {
|
|
[RHF_RCV_TYPE_EXPECTED] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_EAGER] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_IB] = hfi1_ipoib_ib_rcv,
|
|
[RHF_RCV_TYPE_ERROR] = process_receive_error,
|
|
[RHF_RCV_TYPE_BYPASS] = hfi1_vnic_bypass_rcv,
|
|
[RHF_RCV_TYPE_INVALID5] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_INVALID6] = process_receive_invalid,
|
|
[RHF_RCV_TYPE_INVALID7] = process_receive_invalid,
|
|
};
|