diff options
Diffstat (limited to 'drivers/net/enic/enic_main.c')
| -rw-r--r-- | drivers/net/enic/enic_main.c | 50 |
1 files changed, 47 insertions, 3 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c index 2821a1db547..58cae6e6a59 100644 --- a/drivers/net/enic/enic_main.c +++ b/drivers/net/enic/enic_main.c @@ -851,6 +851,50 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq) return 0; } +static int enic_rq_alloc_buf_a1(struct vnic_rq *rq) +{ + struct rq_enet_desc *desc = vnic_rq_next_desc(rq); + + if (vnic_rq_posting_soon(rq)) { + + /* SW workaround for A0 HW erratum: if we're just about + * to write posted_index, insert a dummy desc + * of type resvd + */ + + rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0); + vnic_rq_post(rq, 0, 0, 0, 0); + } else { + return enic_rq_alloc_buf(rq); + } + + return 0; +} + +static int enic_set_rq_alloc_buf(struct enic *enic) +{ + enum vnic_dev_hw_version hw_ver; + int err; + + err = vnic_dev_hw_version(enic->vdev, &hw_ver); + if (err) + return err; + + switch (hw_ver) { + case VNIC_DEV_HW_VER_A1: + enic->rq_alloc_buf = enic_rq_alloc_buf_a1; + break; + case VNIC_DEV_HW_VER_A2: + case VNIC_DEV_HW_VER_UNKNOWN: + enic->rq_alloc_buf = enic_rq_alloc_buf; + break; + default: + return -ENODEV; + } + + return 0; +} + static int enic_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph, u64 *hdr_flags, void *priv) { @@ -1058,7 +1102,7 @@ static int enic_poll(struct napi_struct *napi, int budget) /* Replenish RQ */ - vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); + vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); } else { @@ -1093,7 +1137,7 @@ static int enic_poll_msix(struct napi_struct *napi, int budget) /* Replenish RQ */ - vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); + vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); /* Return intr event credits for this polling * cycle. An intr event is the completion of a @@ -1269,7 +1313,7 @@ static int enic_open(struct net_device *netdev) } for (i = 0; i < enic->rq_count; i++) { - err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); + err = vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf); if (err) { printk(KERN_ERR PFX "%s: Unable to alloc receive buffers.\n", |