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1950 lines
51 KiB
1950 lines
51 KiB
/* |
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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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|
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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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|
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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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|
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#include "ipoib.h" |
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#include "netdev.h" |
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|
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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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/* |
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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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|
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DEFINE_MUTEX(hfi1_mutex); /* general driver use */ |
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|
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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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|
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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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|
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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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|
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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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/* |
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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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|
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struct hfi1_ib_stats hfi1_stats; |
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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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if (rhf_use_egr_bfr(packet->rhf)) |
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ebuf = packet->ebuf; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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drop: |
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return; |
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} |
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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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|
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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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/** |
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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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|
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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); |
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} else { |
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pkey = ib_bth_get_pkey(ohdr); |
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sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf); |
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dlid = qp->ibqp.qp_type != IB_QPT_UD ? ib_get_dlid(pkt->hdr) : |
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ppd->lid; |
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slid = ib_get_slid(pkt->hdr); |
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is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) && |
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(dlid != be16_to_cpu(IB_LID_PERMISSIVE)); |
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opcode = ib_bth_get_opcode(ohdr); |
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hdr_type = HFI1_PKT_TYPE_9B; |
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fecn = ib_bth_get_fecn(ohdr); |
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becn = ib_bth_get_becn(ohdr); |
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} |
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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 = slid; |
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rqpn = ib_get_sqpn(pkt->ohdr); |
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svc_type = IB_CC_SVCTYPE_UD; |
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break; |
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case IB_QPT_SMI: |
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case IB_QPT_GSI: |
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rlid = slid; |
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rqpn = ib_get_sqpn(pkt->ohdr); |
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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 = rdma_ah_get_dlid(&qp->remote_ah_attr); |
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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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case IB_QPT_RC: |
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rlid = rdma_ah_get_dlid(&qp->remote_ah_attr); |
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rqpn = qp->remote_qpn; |
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svc_type = IB_CC_SVCTYPE_RC; |
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break; |
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default: |
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return false; |
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} |
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|
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ignore_fecn = is_mcast || (opcode == IB_OPCODE_CNP) || |
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(opcode == IB_OPCODE_RC_ACKNOWLEDGE); |
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/* |
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* 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; |
|
|
|
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; |
|
|
|
dev_sw_netstats_rx_add(netdev, 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, |
|
};
|
|
|