mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Grzegorz Andrejczuk](/assets/img/avatar_default.png)
As described in earlier patches, ipoib netdev will share receive contexts with existing VNIC netdev through a dummy netdev. The following changes are made to achieve that: - Set up netdev receive contexts after user contexts. A function is added to count the available netdev receive contexts. - Add functions to set/get receive map table free index. - Rename NUM_VNIC_MAP_ENTRIES as NUM_NETDEV_MAP_ENTRIES. - Let the dummy netdev own the receive contexts instead of VNIC. - Allocate the dummy netdev when the hfi1 device is added and free it when the device is removed. - Initialize AIP RSM rules when the IpoIb rxq is initialized and remove the rules when it is de-initialized. - Convert VNIC to use the dummy netdev. Link: https://lore.kernel.org/r/20200511160649.173205.4626.stgit@awfm-01.aw.intel.com Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Sadanand Warrier <sadanand.warrier@intel.com> Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
95 lines
2 KiB
C
95 lines
2 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
|
|
/*
|
|
* Copyright(c) 2020 Intel Corporation.
|
|
*
|
|
*/
|
|
|
|
#include "netdev.h"
|
|
#include "ipoib.h"
|
|
|
|
#define HFI1_IPOIB_SKB_PAD ((NET_SKB_PAD) + (NET_IP_ALIGN))
|
|
|
|
static void copy_ipoib_buf(struct sk_buff *skb, void *data, int size)
|
|
{
|
|
void *dst_data;
|
|
|
|
skb_checksum_none_assert(skb);
|
|
skb->protocol = *((__be16 *)data);
|
|
|
|
dst_data = skb_put(skb, size);
|
|
memcpy(dst_data, data, size);
|
|
skb->mac_header = HFI1_IPOIB_PSEUDO_LEN;
|
|
skb_pull(skb, HFI1_IPOIB_ENCAP_LEN);
|
|
}
|
|
|
|
static struct sk_buff *prepare_frag_skb(struct napi_struct *napi, int size)
|
|
{
|
|
struct sk_buff *skb;
|
|
int skb_size = SKB_DATA_ALIGN(size + HFI1_IPOIB_SKB_PAD);
|
|
void *frag;
|
|
|
|
skb_size += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
|
|
skb_size = SKB_DATA_ALIGN(skb_size);
|
|
frag = napi_alloc_frag(skb_size);
|
|
|
|
if (unlikely(!frag))
|
|
return napi_alloc_skb(napi, size);
|
|
|
|
skb = build_skb(frag, skb_size);
|
|
|
|
if (unlikely(!skb)) {
|
|
skb_free_frag(frag);
|
|
return NULL;
|
|
}
|
|
|
|
skb_reserve(skb, HFI1_IPOIB_SKB_PAD);
|
|
return skb;
|
|
}
|
|
|
|
struct sk_buff *hfi1_ipoib_prepare_skb(struct hfi1_netdev_rxq *rxq,
|
|
int size, void *data)
|
|
{
|
|
struct napi_struct *napi = &rxq->napi;
|
|
int skb_size = size + HFI1_IPOIB_ENCAP_LEN;
|
|
struct sk_buff *skb;
|
|
|
|
/*
|
|
* For smaller(4k + skb overhead) allocations we will go using
|
|
* napi cache. Otherwise we will try to use napi frag cache.
|
|
*/
|
|
if (size <= SKB_WITH_OVERHEAD(PAGE_SIZE))
|
|
skb = napi_alloc_skb(napi, skb_size);
|
|
else
|
|
skb = prepare_frag_skb(napi, skb_size);
|
|
|
|
if (unlikely(!skb))
|
|
return NULL;
|
|
|
|
copy_ipoib_buf(skb, data, size);
|
|
|
|
return skb;
|
|
}
|
|
|
|
int hfi1_ipoib_rxq_init(struct net_device *netdev)
|
|
{
|
|
struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
|
|
struct hfi1_devdata *dd = ipoib_priv->dd;
|
|
int ret;
|
|
|
|
ret = hfi1_netdev_rx_init(dd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
hfi1_init_aip_rsm(dd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void hfi1_ipoib_rxq_deinit(struct net_device *netdev)
|
|
{
|
|
struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
|
|
struct hfi1_devdata *dd = ipoib_priv->dd;
|
|
|
|
hfi1_deinit_aip_rsm(dd);
|
|
hfi1_netdev_rx_destroy(dd);
|
|
}
|