IB/hfi1: OPA_VNIC RDMA netdev support
Add support to create and free OPA_VNIC rdma netdev devices. Implement netstack interface functionality including xmit_skb, receive side NAPI etc. Also implement rdma netdev control functions. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Vishwanathapura, Niranjana
Doug Ledford
parent
1bd671ab3f
commit
d4829ea603
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@ -12,7 +12,7 @@ hfi1-y := affinity.o chip.o device.o driver.o efivar.o \
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init.o intr.o mad.o mmu_rb.o pcie.o pio.o pio_copy.o platform.o \
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qp.o qsfp.o rc.o ruc.o sdma.o sysfs.o trace.o \
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uc.o ud.o user_exp_rcv.o user_pages.o user_sdma.o verbs.o \
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verbs_txreq.o
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verbs_txreq.o vnic_main.o
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hfi1-$(CONFIG_DEBUG_FS) += debugfs.o
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CFLAGS_trace.o = -I$(src)
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@ -1,5 +1,5 @@
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/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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* Copyright(c) 2015-2017 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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@ -60,6 +60,7 @@
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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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#undef pr_fmt
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#define pr_fmt(fmt) DRIVER_NAME ": " fmt
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@ -1381,15 +1382,31 @@ int process_receive_ib(struct hfi1_packet *packet)
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return RHF_RCV_CONTINUE;
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}
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static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
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{
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/* Packet received in VNIC context via RSM */
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if (packet->rcd->is_vnic)
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return true;
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if ((HFI1_GET_L2_TYPE(packet->ebuf) == OPA_VNIC_L2_TYPE) &&
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(HFI1_GET_L4_TYPE(packet->ebuf) == OPA_VNIC_L4_ETHR))
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return true;
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return false;
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}
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int process_receive_bypass(struct hfi1_packet *packet)
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{
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struct hfi1_devdata *dd = packet->rcd->dd;
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if (unlikely(rhf_err_flags(packet->rhf)))
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if (unlikely(rhf_err_flags(packet->rhf))) {
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handle_eflags(packet);
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} else if (hfi1_is_vnic_packet(packet)) {
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hfi1_vnic_bypass_rcv(packet);
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return RHF_RCV_CONTINUE;
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}
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dd_dev_err(dd,
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"Bypass packets are not supported in normal operation. Dropping\n");
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dd_dev_err(dd, "Unsupported bypass packet. Dropping\n");
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incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
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if (!(dd->err_info_rcvport.status_and_code & OPA_EI_STATUS_SMASK)) {
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u64 *flits = packet->ebuf;
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@ -1,7 +1,7 @@
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#ifndef _HFI1_KERNEL_H
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#define _HFI1_KERNEL_H
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/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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* Copyright(c) 2015-2017 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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@ -337,6 +337,12 @@ struct hfi1_ctxtdata {
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* packets with the wrong interrupt handler.
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*/
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int (*do_interrupt)(struct hfi1_ctxtdata *rcd, int threaded);
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/* Indicates that this is vnic context */
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bool is_vnic;
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/* vnic queue index this context is mapped to */
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u8 vnic_q_idx;
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};
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/*
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@ -808,6 +814,19 @@ struct hfi1_asic_data {
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struct hfi1_i2c_bus *i2c_bus1;
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};
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/*
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* Number of VNIC contexts used. Ensure it is less than or equal to
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* max queues supported by VNIC (HFI1_VNIC_MAX_QUEUE).
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*/
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#define HFI1_NUM_VNIC_CTXT 8
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/* Virtual NIC information */
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struct hfi1_vnic_data {
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struct idr vesw_idr;
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};
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struct hfi1_vnic_vport_info;
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/* device data struct now contains only "general per-device" info.
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* fields related to a physical IB port are in a hfi1_pportdata struct.
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*/
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@ -1115,6 +1134,9 @@ struct hfi1_devdata {
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send_routine process_dma_send;
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void (*pio_inline_send)(struct hfi1_devdata *dd, struct pio_buf *pbuf,
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u64 pbc, const void *from, size_t count);
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int (*process_vnic_dma_send)(struct hfi1_devdata *dd, u8 q_idx,
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struct hfi1_vnic_vport_info *vinfo,
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struct sk_buff *skb, u64 pbc, u8 plen);
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/* hfi1_pportdata, points to array of (physical) port-specific
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* data structs, indexed by pidx (0..n-1)
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*/
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@ -1170,6 +1192,9 @@ struct hfi1_devdata {
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struct rhashtable *sdma_rht;
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struct kobject kobj;
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/* vnic data */
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struct hfi1_vnic_data vnic;
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};
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/* 8051 firmware version helper */
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@ -1,5 +1,5 @@
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/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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* Copyright(c) 2015-2017 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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@ -65,6 +65,7 @@
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#include "verbs.h"
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#include "aspm.h"
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#include "affinity.h"
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#include "vnic.h"
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#undef pr_fmt
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#define pr_fmt(fmt) DRIVER_NAME ": " fmt
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@ -1498,6 +1499,9 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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/* do the generic initialization */
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initfail = hfi1_init(dd, 0);
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/* setup vnic */
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hfi1_vnic_setup(dd);
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ret = hfi1_register_ib_device(dd);
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/*
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@ -1575,6 +1579,9 @@ static void remove_one(struct pci_dev *pdev)
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/* unregister from IB core */
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hfi1_unregister_ib_device(dd);
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/* cleanup vnic */
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hfi1_vnic_cleanup(dd);
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/*
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* Disable the IB link, disable interrupts on the device,
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* clear dma engines, etc.
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@ -0,0 +1,153 @@
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#ifndef _HFI1_VNIC_H
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#define _HFI1_VNIC_H
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/*
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* Copyright(c) 2017 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 <rdma/opa_vnic.h>
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#include "hfi.h"
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#define HFI1_VNIC_MAX_TXQ 16
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#define HFI1_VNIC_MAX_PAD 12
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/* L2 header definitions */
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#define HFI1_L2_TYPE_OFFSET 0x7
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#define HFI1_L2_TYPE_SHFT 0x5
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#define HFI1_L2_TYPE_MASK 0x3
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#define HFI1_GET_L2_TYPE(hdr) \
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((*((u8 *)(hdr) + HFI1_L2_TYPE_OFFSET) >> HFI1_L2_TYPE_SHFT) & \
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HFI1_L2_TYPE_MASK)
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/* L4 type definitions */
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#define HFI1_L4_TYPE_OFFSET 8
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#define HFI1_GET_L4_TYPE(data) \
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(*((u8 *)(data) + HFI1_L4_TYPE_OFFSET))
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/* L4 header definitions */
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#define HFI1_VNIC_L4_HDR_OFFSET OPA_VNIC_L2_HDR_LEN
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#define HFI1_VNIC_GET_L4_HDR(data) \
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(*((u16 *)((u8 *)(data) + HFI1_VNIC_L4_HDR_OFFSET)))
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#define HFI1_VNIC_GET_VESWID(data) \
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(HFI1_VNIC_GET_L4_HDR(data) & 0xFFF)
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/* Service class */
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#define HFI1_VNIC_SC_OFFSET_LOW 6
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#define HFI1_VNIC_SC_OFFSET_HI 7
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#define HFI1_VNIC_SC_SHIFT 4
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#define HFI1_VNIC_MAX_QUEUE 16
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/**
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* struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
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* @idx: queue index
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* @vinfo: pointer to vport information
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* @netdev: network device
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* @napi: netdev napi structure
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* @skbq: queue of received socket buffers
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*/
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struct hfi1_vnic_rx_queue {
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u8 idx;
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struct hfi1_vnic_vport_info *vinfo;
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struct net_device *netdev;
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struct napi_struct napi;
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struct sk_buff_head skbq;
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};
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/**
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* struct hfi1_vnic_vport_info - HFI1 VNIC virtual port information
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* @dd: device data pointer
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* @netdev: net device pointer
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* @flags: state flags
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* @lock: vport lock
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* @num_tx_q: number of transmit queues
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* @num_rx_q: number of receive queues
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* @vesw_id: virtual switch id
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* @rxq: Array of receive queues
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* @stats: per queue stats
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*/
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struct hfi1_vnic_vport_info {
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struct hfi1_devdata *dd;
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struct net_device *netdev;
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unsigned long flags;
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/* Lock used around state updates */
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struct mutex lock;
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u8 num_tx_q;
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u8 num_rx_q;
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u16 vesw_id;
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struct hfi1_vnic_rx_queue rxq[HFI1_NUM_VNIC_CTXT];
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struct opa_vnic_stats stats[HFI1_VNIC_MAX_QUEUE];
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};
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#define v_dbg(format, arg...) \
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netdev_dbg(vinfo->netdev, format, ## arg)
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#define v_err(format, arg...) \
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netdev_err(vinfo->netdev, format, ## arg)
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#define v_info(format, arg...) \
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netdev_info(vinfo->netdev, format, ## arg)
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/* vnic hfi1 internal functions */
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void hfi1_vnic_setup(struct hfi1_devdata *dd);
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void hfi1_vnic_cleanup(struct hfi1_devdata *dd);
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void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
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/* vnic rdma netdev operations */
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struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
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u8 port_num,
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enum rdma_netdev_t type,
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const char *name,
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unsigned char name_assign_type,
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void (*setup)(struct net_device *));
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void hfi1_vnic_free_rn(struct net_device *netdev);
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#endif /* _HFI1_VNIC_H */
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@ -0,0 +1,644 @@
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/*
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* Copyright(c) 2017 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
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* - Redistributions in binary form must reproduce the above copyright
|
||||
* 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
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* 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,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* 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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* This file contains HFI1 support for VNIC functionality
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*/
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#include <linux/io.h>
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#include <linux/if_vlan.h>
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#include "vnic.h"
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#define HFI_TX_TIMEOUT_MS 1000
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#define HFI1_VNIC_RCV_Q_SIZE 1024
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#define HFI1_VNIC_UP 0
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static DEFINE_SPINLOCK(vport_cntr_lock);
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void hfi1_vnic_setup(struct hfi1_devdata *dd)
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{
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idr_init(&dd->vnic.vesw_idr);
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}
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void hfi1_vnic_cleanup(struct hfi1_devdata *dd)
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{
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idr_destroy(&dd->vnic.vesw_idr);
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}
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#define SUM_GRP_COUNTERS(stats, qstats, x_grp) do { \
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u64 *src64, *dst64; \
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for (src64 = &qstats->x_grp.unicast, \
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dst64 = &stats->x_grp.unicast; \
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dst64 <= &stats->x_grp.s_1519_max;) { \
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*dst64++ += *src64++; \
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} \
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} while (0)
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/* hfi1_vnic_update_stats - update statistics */
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static void hfi1_vnic_update_stats(struct hfi1_vnic_vport_info *vinfo,
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struct opa_vnic_stats *stats)
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{
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struct net_device *netdev = vinfo->netdev;
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u8 i;
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/* add tx counters on different queues */
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for (i = 0; i < vinfo->num_tx_q; i++) {
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struct opa_vnic_stats *qstats = &vinfo->stats[i];
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struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
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stats->netstats.tx_fifo_errors += qnstats->tx_fifo_errors;
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stats->netstats.tx_carrier_errors += qnstats->tx_carrier_errors;
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stats->tx_drop_state += qstats->tx_drop_state;
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stats->tx_dlid_zero += qstats->tx_dlid_zero;
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SUM_GRP_COUNTERS(stats, qstats, tx_grp);
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stats->netstats.tx_packets += qnstats->tx_packets;
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stats->netstats.tx_bytes += qnstats->tx_bytes;
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}
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/* add rx counters on different queues */
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for (i = 0; i < vinfo->num_rx_q; i++) {
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struct opa_vnic_stats *qstats = &vinfo->stats[i];
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struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
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|
||||
stats->netstats.rx_fifo_errors += qnstats->rx_fifo_errors;
|
||||
stats->netstats.rx_nohandler += qnstats->rx_nohandler;
|
||||
stats->rx_drop_state += qstats->rx_drop_state;
|
||||
stats->rx_oversize += qstats->rx_oversize;
|
||||
stats->rx_runt += qstats->rx_runt;
|
||||
|
||||
SUM_GRP_COUNTERS(stats, qstats, rx_grp);
|
||||
stats->netstats.rx_packets += qnstats->rx_packets;
|
||||
stats->netstats.rx_bytes += qnstats->rx_bytes;
|
||||
}
|
||||
|
||||
stats->netstats.tx_errors = stats->netstats.tx_fifo_errors +
|
||||
stats->netstats.tx_carrier_errors +
|
||||
stats->tx_drop_state + stats->tx_dlid_zero;
|
||||
stats->netstats.tx_dropped = stats->netstats.tx_errors;
|
||||
|
||||
stats->netstats.rx_errors = stats->netstats.rx_fifo_errors +
|
||||
stats->netstats.rx_nohandler +
|
||||
stats->rx_drop_state + stats->rx_oversize +
|
||||
stats->rx_runt;
|
||||
stats->netstats.rx_dropped = stats->netstats.rx_errors;
|
||||
|
||||
netdev->stats.tx_packets = stats->netstats.tx_packets;
|
||||
netdev->stats.tx_bytes = stats->netstats.tx_bytes;
|
||||
netdev->stats.tx_fifo_errors = stats->netstats.tx_fifo_errors;
|
||||
netdev->stats.tx_carrier_errors = stats->netstats.tx_carrier_errors;
|
||||
netdev->stats.tx_errors = stats->netstats.tx_errors;
|
||||
netdev->stats.tx_dropped = stats->netstats.tx_dropped;
|
||||
|
||||
netdev->stats.rx_packets = stats->netstats.rx_packets;
|
||||
netdev->stats.rx_bytes = stats->netstats.rx_bytes;
|
||||
netdev->stats.rx_fifo_errors = stats->netstats.rx_fifo_errors;
|
||||
netdev->stats.multicast = stats->rx_grp.mcastbcast;
|
||||
netdev->stats.rx_length_errors = stats->rx_oversize + stats->rx_runt;
|
||||
netdev->stats.rx_errors = stats->netstats.rx_errors;
|
||||
netdev->stats.rx_dropped = stats->netstats.rx_dropped;
|
||||
}
|
||||
|
||||
/* update_len_counters - update pkt's len histogram counters */
|
||||
static inline void update_len_counters(struct opa_vnic_grp_stats *grp,
|
||||
int len)
|
||||
{
|
||||
/* account for 4 byte FCS */
|
||||
if (len >= 1515)
|
||||
grp->s_1519_max++;
|
||||
else if (len >= 1020)
|
||||
grp->s_1024_1518++;
|
||||
else if (len >= 508)
|
||||
grp->s_512_1023++;
|
||||
else if (len >= 252)
|
||||
grp->s_256_511++;
|
||||
else if (len >= 124)
|
||||
grp->s_128_255++;
|
||||
else if (len >= 61)
|
||||
grp->s_65_127++;
|
||||
else
|
||||
grp->s_64++;
|
||||
}
|
||||
|
||||
/* hfi1_vnic_update_tx_counters - update transmit counters */
|
||||
static void hfi1_vnic_update_tx_counters(struct hfi1_vnic_vport_info *vinfo,
|
||||
u8 q_idx, struct sk_buff *skb, int err)
|
||||
{
|
||||
struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
|
||||
struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
|
||||
struct opa_vnic_grp_stats *tx_grp = &stats->tx_grp;
|
||||
u16 vlan_tci;
|
||||
|
||||
stats->netstats.tx_packets++;
|
||||
stats->netstats.tx_bytes += skb->len + ETH_FCS_LEN;
|
||||
|
||||
update_len_counters(tx_grp, skb->len);
|
||||
|
||||
/* rest of the counts are for good packets only */
|
||||
if (unlikely(err))
|
||||
return;
|
||||
|
||||
if (is_multicast_ether_addr(mac_hdr->h_dest))
|
||||
tx_grp->mcastbcast++;
|
||||
else
|
||||
tx_grp->unicast++;
|
||||
|
||||
if (!__vlan_get_tag(skb, &vlan_tci))
|
||||
tx_grp->vlan++;
|
||||
else
|
||||
tx_grp->untagged++;
|
||||
}
|
||||
|
||||
/* hfi1_vnic_update_rx_counters - update receive counters */
|
||||
static void hfi1_vnic_update_rx_counters(struct hfi1_vnic_vport_info *vinfo,
|
||||
u8 q_idx, struct sk_buff *skb, int err)
|
||||
{
|
||||
struct ethhdr *mac_hdr = (struct ethhdr *)skb->data;
|
||||
struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
|
||||
struct opa_vnic_grp_stats *rx_grp = &stats->rx_grp;
|
||||
u16 vlan_tci;
|
||||
|
||||
stats->netstats.rx_packets++;
|
||||
stats->netstats.rx_bytes += skb->len + ETH_FCS_LEN;
|
||||
|
||||
update_len_counters(rx_grp, skb->len);
|
||||
|
||||
/* rest of the counts are for good packets only */
|
||||
if (unlikely(err))
|
||||
return;
|
||||
|
||||
if (is_multicast_ether_addr(mac_hdr->h_dest))
|
||||
rx_grp->mcastbcast++;
|
||||
else
|
||||
rx_grp->unicast++;
|
||||
|
||||
if (!__vlan_get_tag(skb, &vlan_tci))
|
||||
rx_grp->vlan++;
|
||||
else
|
||||
rx_grp->untagged++;
|
||||
}
|
||||
|
||||
/* This function is overloaded for opa_vnic specific implementation */
|
||||
static void hfi1_vnic_get_stats64(struct net_device *netdev,
|
||||
struct rtnl_link_stats64 *stats)
|
||||
{
|
||||
struct opa_vnic_stats *vstats = (struct opa_vnic_stats *)stats;
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
|
||||
hfi1_vnic_update_stats(vinfo, vstats);
|
||||
}
|
||||
|
||||
static u64 create_bypass_pbc(u32 vl, u32 dw_len)
|
||||
{
|
||||
u64 pbc;
|
||||
|
||||
pbc = ((u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT)
|
||||
| PBC_INSERT_BYPASS_ICRC | PBC_CREDIT_RETURN
|
||||
| PBC_PACKET_BYPASS
|
||||
| ((vl & PBC_VL_MASK) << PBC_VL_SHIFT)
|
||||
| (dw_len & PBC_LENGTH_DWS_MASK) << PBC_LENGTH_DWS_SHIFT;
|
||||
|
||||
return pbc;
|
||||
}
|
||||
|
||||
/* hfi1_vnic_maybe_stop_tx - stop tx queue if required */
|
||||
static void hfi1_vnic_maybe_stop_tx(struct hfi1_vnic_vport_info *vinfo,
|
||||
u8 q_idx)
|
||||
{
|
||||
netif_stop_subqueue(vinfo->netdev, q_idx);
|
||||
}
|
||||
|
||||
static netdev_tx_t hfi1_netdev_start_xmit(struct sk_buff *skb,
|
||||
struct net_device *netdev)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
u8 pad_len, q_idx = skb->queue_mapping;
|
||||
struct hfi1_devdata *dd = vinfo->dd;
|
||||
struct opa_vnic_skb_mdata *mdata;
|
||||
u32 pkt_len, total_len;
|
||||
int err = -EINVAL;
|
||||
u64 pbc;
|
||||
|
||||
v_dbg("xmit: queue %d skb len %d\n", q_idx, skb->len);
|
||||
if (unlikely(!netif_oper_up(netdev))) {
|
||||
vinfo->stats[q_idx].tx_drop_state++;
|
||||
goto tx_finish;
|
||||
}
|
||||
|
||||
/* take out meta data */
|
||||
mdata = (struct opa_vnic_skb_mdata *)skb->data;
|
||||
skb_pull(skb, sizeof(*mdata));
|
||||
if (unlikely(mdata->flags & OPA_VNIC_SKB_MDATA_ENCAP_ERR)) {
|
||||
vinfo->stats[q_idx].tx_dlid_zero++;
|
||||
goto tx_finish;
|
||||
}
|
||||
|
||||
/* add tail padding (for 8 bytes size alignment) and icrc */
|
||||
pad_len = -(skb->len + OPA_VNIC_ICRC_TAIL_LEN) & 0x7;
|
||||
pad_len += OPA_VNIC_ICRC_TAIL_LEN;
|
||||
|
||||
/*
|
||||
* pkt_len is how much data we have to write, includes header and data.
|
||||
* total_len is length of the packet in Dwords plus the PBC should not
|
||||
* include the CRC.
|
||||
*/
|
||||
pkt_len = (skb->len + pad_len) >> 2;
|
||||
total_len = pkt_len + 2; /* PBC + packet */
|
||||
|
||||
pbc = create_bypass_pbc(mdata->vl, total_len);
|
||||
|
||||
skb_get(skb);
|
||||
v_dbg("pbc 0x%016llX len %d pad_len %d\n", pbc, skb->len, pad_len);
|
||||
err = dd->process_vnic_dma_send(dd, q_idx, vinfo, skb, pbc, pad_len);
|
||||
if (unlikely(err)) {
|
||||
if (err == -ENOMEM)
|
||||
vinfo->stats[q_idx].netstats.tx_fifo_errors++;
|
||||
else if (err != -EBUSY)
|
||||
vinfo->stats[q_idx].netstats.tx_carrier_errors++;
|
||||
}
|
||||
/* remove the header before updating tx counters */
|
||||
skb_pull(skb, OPA_VNIC_HDR_LEN);
|
||||
|
||||
if (unlikely(err == -EBUSY)) {
|
||||
hfi1_vnic_maybe_stop_tx(vinfo, q_idx);
|
||||
dev_kfree_skb_any(skb);
|
||||
return NETDEV_TX_BUSY;
|
||||
}
|
||||
|
||||
tx_finish:
|
||||
/* update tx counters */
|
||||
hfi1_vnic_update_tx_counters(vinfo, q_idx, skb, err);
|
||||
dev_kfree_skb_any(skb);
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
static u16 hfi1_vnic_select_queue(struct net_device *netdev,
|
||||
struct sk_buff *skb,
|
||||
void *accel_priv,
|
||||
select_queue_fallback_t fallback)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* hfi1_vnic_decap_skb - strip OPA header from the skb (ethernet) packet */
|
||||
static inline int hfi1_vnic_decap_skb(struct hfi1_vnic_rx_queue *rxq,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
|
||||
int max_len = vinfo->netdev->mtu + VLAN_ETH_HLEN;
|
||||
int rc = -EFAULT;
|
||||
|
||||
skb_pull(skb, OPA_VNIC_HDR_LEN);
|
||||
|
||||
/* Validate Packet length */
|
||||
if (unlikely(skb->len > max_len))
|
||||
vinfo->stats[rxq->idx].rx_oversize++;
|
||||
else if (unlikely(skb->len < ETH_ZLEN))
|
||||
vinfo->stats[rxq->idx].rx_runt++;
|
||||
else
|
||||
rc = 0;
|
||||
return rc;
|
||||
}
|
||||
|
||||
static inline struct sk_buff *hfi1_vnic_get_skb(struct hfi1_vnic_rx_queue *rxq)
|
||||
{
|
||||
unsigned char *pad_info;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = skb_dequeue(&rxq->skbq);
|
||||
if (unlikely(!skb))
|
||||
return NULL;
|
||||
|
||||
/* remove tail padding and icrc */
|
||||
pad_info = skb->data + skb->len - 1;
|
||||
skb_trim(skb, (skb->len - OPA_VNIC_ICRC_TAIL_LEN -
|
||||
((*pad_info) & 0x7)));
|
||||
|
||||
return skb;
|
||||
}
|
||||
|
||||
/* hfi1_vnic_handle_rx - handle skb receive */
|
||||
static void hfi1_vnic_handle_rx(struct hfi1_vnic_rx_queue *rxq,
|
||||
int *work_done, int work_to_do)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
|
||||
struct sk_buff *skb;
|
||||
int rc;
|
||||
|
||||
while (1) {
|
||||
if (*work_done >= work_to_do)
|
||||
break;
|
||||
|
||||
skb = hfi1_vnic_get_skb(rxq);
|
||||
if (unlikely(!skb))
|
||||
break;
|
||||
|
||||
rc = hfi1_vnic_decap_skb(rxq, skb);
|
||||
/* update rx counters */
|
||||
hfi1_vnic_update_rx_counters(vinfo, rxq->idx, skb, rc);
|
||||
if (unlikely(rc)) {
|
||||
dev_kfree_skb_any(skb);
|
||||
continue;
|
||||
}
|
||||
|
||||
skb_checksum_none_assert(skb);
|
||||
skb->protocol = eth_type_trans(skb, rxq->netdev);
|
||||
|
||||
napi_gro_receive(&rxq->napi, skb);
|
||||
(*work_done)++;
|
||||
}
|
||||
}
|
||||
|
||||
/* hfi1_vnic_napi - napi receive polling callback function */
|
||||
static int hfi1_vnic_napi(struct napi_struct *napi, int budget)
|
||||
{
|
||||
struct hfi1_vnic_rx_queue *rxq = container_of(napi,
|
||||
struct hfi1_vnic_rx_queue, napi);
|
||||
struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
|
||||
int work_done = 0;
|
||||
|
||||
v_dbg("napi %d budget %d\n", rxq->idx, budget);
|
||||
hfi1_vnic_handle_rx(rxq, &work_done, budget);
|
||||
|
||||
v_dbg("napi %d work_done %d\n", rxq->idx, work_done);
|
||||
if (work_done < budget)
|
||||
napi_complete(napi);
|
||||
|
||||
return work_done;
|
||||
}
|
||||
|
||||
void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
|
||||
{
|
||||
struct hfi1_devdata *dd = packet->rcd->dd;
|
||||
struct hfi1_vnic_vport_info *vinfo = NULL;
|
||||
struct hfi1_vnic_rx_queue *rxq;
|
||||
struct sk_buff *skb;
|
||||
int l4_type, vesw_id = -1;
|
||||
u8 q_idx;
|
||||
|
||||
l4_type = HFI1_GET_L4_TYPE(packet->ebuf);
|
||||
if (likely(l4_type == OPA_VNIC_L4_ETHR)) {
|
||||
vesw_id = HFI1_VNIC_GET_VESWID(packet->ebuf);
|
||||
vinfo = idr_find(&dd->vnic.vesw_idr, vesw_id);
|
||||
|
||||
/*
|
||||
* In case of invalid vesw id, count the error on
|
||||
* the first available vport.
|
||||
*/
|
||||
if (unlikely(!vinfo)) {
|
||||
struct hfi1_vnic_vport_info *vinfo_tmp;
|
||||
int id_tmp = 0;
|
||||
|
||||
vinfo_tmp = idr_get_next(&dd->vnic.vesw_idr, &id_tmp);
|
||||
if (vinfo_tmp) {
|
||||
spin_lock(&vport_cntr_lock);
|
||||
vinfo_tmp->stats[0].netstats.rx_nohandler++;
|
||||
spin_unlock(&vport_cntr_lock);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (unlikely(!vinfo)) {
|
||||
dd_dev_warn(dd, "vnic rcv err: l4 %d vesw id %d ctx %d\n",
|
||||
l4_type, vesw_id, packet->rcd->ctxt);
|
||||
return;
|
||||
}
|
||||
|
||||
q_idx = packet->rcd->vnic_q_idx;
|
||||
rxq = &vinfo->rxq[q_idx];
|
||||
if (unlikely(!netif_oper_up(vinfo->netdev))) {
|
||||
vinfo->stats[q_idx].rx_drop_state++;
|
||||
skb_queue_purge(&rxq->skbq);
|
||||
return;
|
||||
}
|
||||
|
||||
if (unlikely(skb_queue_len(&rxq->skbq) > HFI1_VNIC_RCV_Q_SIZE)) {
|
||||
vinfo->stats[q_idx].netstats.rx_fifo_errors++;
|
||||
return;
|
||||
}
|
||||
|
||||
skb = netdev_alloc_skb(vinfo->netdev, packet->tlen);
|
||||
if (unlikely(!skb)) {
|
||||
vinfo->stats[q_idx].netstats.rx_fifo_errors++;
|
||||
return;
|
||||
}
|
||||
|
||||
memcpy(skb->data, packet->ebuf, packet->tlen);
|
||||
skb_put(skb, packet->tlen);
|
||||
skb_queue_tail(&rxq->skbq, skb);
|
||||
|
||||
if (napi_schedule_prep(&rxq->napi)) {
|
||||
v_dbg("napi %d scheduling\n", q_idx);
|
||||
__napi_schedule(&rxq->napi);
|
||||
}
|
||||
}
|
||||
|
||||
static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
|
||||
{
|
||||
struct hfi1_devdata *dd = vinfo->dd;
|
||||
struct net_device *netdev = vinfo->netdev;
|
||||
int i, rc;
|
||||
|
||||
/* ensure virtual eth switch id is valid */
|
||||
if (!vinfo->vesw_id)
|
||||
return -EINVAL;
|
||||
|
||||
rc = idr_alloc(&dd->vnic.vesw_idr, vinfo, vinfo->vesw_id,
|
||||
vinfo->vesw_id + 1, GFP_NOWAIT);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
for (i = 0; i < vinfo->num_rx_q; i++) {
|
||||
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
|
||||
|
||||
skb_queue_head_init(&rxq->skbq);
|
||||
napi_enable(&rxq->napi);
|
||||
}
|
||||
|
||||
netif_carrier_on(netdev);
|
||||
netif_tx_start_all_queues(netdev);
|
||||
set_bit(HFI1_VNIC_UP, &vinfo->flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
|
||||
{
|
||||
struct hfi1_devdata *dd = vinfo->dd;
|
||||
u8 i;
|
||||
|
||||
clear_bit(HFI1_VNIC_UP, &vinfo->flags);
|
||||
netif_carrier_off(vinfo->netdev);
|
||||
netif_tx_disable(vinfo->netdev);
|
||||
idr_remove(&dd->vnic.vesw_idr, vinfo->vesw_id);
|
||||
|
||||
/* remove unread skbs */
|
||||
for (i = 0; i < vinfo->num_rx_q; i++) {
|
||||
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
|
||||
|
||||
napi_disable(&rxq->napi);
|
||||
skb_queue_purge(&rxq->skbq);
|
||||
}
|
||||
}
|
||||
|
||||
static int hfi1_netdev_open(struct net_device *netdev)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
int rc;
|
||||
|
||||
mutex_lock(&vinfo->lock);
|
||||
rc = hfi1_vnic_up(vinfo);
|
||||
mutex_unlock(&vinfo->lock);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int hfi1_netdev_close(struct net_device *netdev)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
|
||||
mutex_lock(&vinfo->lock);
|
||||
if (test_bit(HFI1_VNIC_UP, &vinfo->flags))
|
||||
hfi1_vnic_down(vinfo);
|
||||
mutex_unlock(&vinfo->lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void hfi1_vnic_set_vesw_id(struct net_device *netdev, int id)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
bool reopen = false;
|
||||
|
||||
/*
|
||||
* If vesw_id is being changed, and if the vnic port is up,
|
||||
* reset the vnic port to ensure new vesw_id gets picked up
|
||||
*/
|
||||
if (id != vinfo->vesw_id) {
|
||||
mutex_lock(&vinfo->lock);
|
||||
if (test_bit(HFI1_VNIC_UP, &vinfo->flags)) {
|
||||
hfi1_vnic_down(vinfo);
|
||||
reopen = true;
|
||||
}
|
||||
|
||||
vinfo->vesw_id = id;
|
||||
if (reopen)
|
||||
hfi1_vnic_up(vinfo);
|
||||
|
||||
mutex_unlock(&vinfo->lock);
|
||||
}
|
||||
}
|
||||
|
||||
/* netdev ops */
|
||||
static const struct net_device_ops hfi1_netdev_ops = {
|
||||
.ndo_open = hfi1_netdev_open,
|
||||
.ndo_stop = hfi1_netdev_close,
|
||||
.ndo_start_xmit = hfi1_netdev_start_xmit,
|
||||
.ndo_select_queue = hfi1_vnic_select_queue,
|
||||
.ndo_get_stats64 = hfi1_vnic_get_stats64,
|
||||
};
|
||||
|
||||
struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
|
||||
u8 port_num,
|
||||
enum rdma_netdev_t type,
|
||||
const char *name,
|
||||
unsigned char name_assign_type,
|
||||
void (*setup)(struct net_device *))
|
||||
{
|
||||
struct hfi1_devdata *dd = dd_from_ibdev(device);
|
||||
struct hfi1_vnic_vport_info *vinfo;
|
||||
struct net_device *netdev;
|
||||
struct rdma_netdev *rn;
|
||||
int i, size;
|
||||
|
||||
if (!port_num || (port_num > dd->num_pports))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
if (type != RDMA_NETDEV_OPA_VNIC)
|
||||
return ERR_PTR(-EOPNOTSUPP);
|
||||
|
||||
size = sizeof(struct opa_vnic_rdma_netdev) + sizeof(*vinfo);
|
||||
netdev = alloc_netdev_mqs(size, name, name_assign_type, setup,
|
||||
dd->chip_sdma_engines, HFI1_NUM_VNIC_CTXT);
|
||||
if (!netdev)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
rn = netdev_priv(netdev);
|
||||
vinfo = opa_vnic_dev_priv(netdev);
|
||||
vinfo->dd = dd;
|
||||
vinfo->num_tx_q = dd->chip_sdma_engines;
|
||||
vinfo->num_rx_q = HFI1_NUM_VNIC_CTXT;
|
||||
vinfo->netdev = netdev;
|
||||
rn->set_id = hfi1_vnic_set_vesw_id;
|
||||
|
||||
netdev->features = NETIF_F_HIGHDMA | NETIF_F_SG;
|
||||
netdev->hw_features = netdev->features;
|
||||
netdev->vlan_features = netdev->features;
|
||||
netdev->watchdog_timeo = msecs_to_jiffies(HFI_TX_TIMEOUT_MS);
|
||||
netdev->netdev_ops = &hfi1_netdev_ops;
|
||||
mutex_init(&vinfo->lock);
|
||||
|
||||
for (i = 0; i < vinfo->num_rx_q; i++) {
|
||||
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
|
||||
|
||||
rxq->idx = i;
|
||||
rxq->vinfo = vinfo;
|
||||
rxq->netdev = netdev;
|
||||
netif_napi_add(netdev, &rxq->napi, hfi1_vnic_napi, 64);
|
||||
}
|
||||
|
||||
return netdev;
|
||||
}
|
||||
|
||||
void hfi1_vnic_free_rn(struct net_device *netdev)
|
||||
{
|
||||
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
||||
|
||||
mutex_destroy(&vinfo->lock);
|
||||
free_netdev(netdev);
|
||||
}
|
||||
Loading…
Reference in New Issue