diff options
-rw-r--r-- | drivers/net/enic/enic_main.c | 50 | ||||
-rw-r--r-- | drivers/net/enic/vnic_dev.c | 19 | ||||
-rw-r--r-- | drivers/net/enic/vnic_dev.h | 8 | ||||
-rw-r--r-- | drivers/net/enic/vnic_rq.h | 7 |
4 files changed, 80 insertions, 4 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c index 2821a1d..58cae6e 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", diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c index d5c28ef..c8d3fc7 100644 --- a/drivers/net/enic/vnic_dev.c +++ b/drivers/net/enic/vnic_dev.c @@ -349,6 +349,25 @@ int vnic_dev_fw_info(struct vnic_dev *vdev, return err; } +int vnic_dev_hw_version(struct vnic_dev *vdev, enum vnic_dev_hw_version *hw_ver) +{ + struct vnic_devcmd_fw_info *fw_info; + int err; + + err = vnic_dev_fw_info(vdev, &fw_info); + if (err) + return err; + + if (strncmp(fw_info->hw_version, "A1", sizeof("A1")) == 0) + *hw_ver = VNIC_DEV_HW_VER_A1; + else if (strncmp(fw_info->hw_version, "A2", sizeof("A2")) == 0) + *hw_ver = VNIC_DEV_HW_VER_A2; + else + *hw_ver = VNIC_DEV_HW_VER_UNKNOWN; + + return 0; +} + int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size, void *value) { diff --git a/drivers/net/enic/vnic_dev.h b/drivers/net/enic/vnic_dev.h index d960edb..db1d63e 100644 --- a/drivers/net/enic/vnic_dev.h +++ b/drivers/net/enic/vnic_dev.h @@ -41,6 +41,12 @@ static inline void writeq(u64 val, void __iomem *reg) } #endif +enum vnic_dev_hw_version { + VNIC_DEV_HW_VER_UNKNOWN, + VNIC_DEV_HW_VER_A1, + VNIC_DEV_HW_VER_A2, +}; + enum vnic_dev_intr_mode { VNIC_DEV_INTR_MODE_UNKNOWN, VNIC_DEV_INTR_MODE_INTX, @@ -88,6 +94,8 @@ int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, u64 *a0, u64 *a1, int wait); int vnic_dev_fw_info(struct vnic_dev *vdev, struct vnic_devcmd_fw_info **fw_info); +int vnic_dev_hw_version(struct vnic_dev *vdev, + enum vnic_dev_hw_version *hw_ver); int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size, void *value); int vnic_dev_stats_clear(struct vnic_dev *vdev); diff --git a/drivers/net/enic/vnic_rq.h b/drivers/net/enic/vnic_rq.h index fd0ef66..f7b5730 100644 --- a/drivers/net/enic/vnic_rq.h +++ b/drivers/net/enic/vnic_rq.h @@ -143,6 +143,11 @@ static inline void vnic_rq_post(struct vnic_rq *rq, } } +static inline int vnic_rq_posting_soon(struct vnic_rq *rq) +{ + return ((rq->to_use->index & VNIC_RQ_RETURN_RATE) == 0); +} + static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count) { rq->ring.desc_avail += count; @@ -186,7 +191,7 @@ static inline int vnic_rq_fill(struct vnic_rq *rq, { int err; - while (vnic_rq_desc_avail(rq) > 1) { + while (vnic_rq_desc_avail(rq) > 0) { err = (*buf_fill)(rq); if (err) |