On Wed, 2014-04-16 at 19:39 -0700, Iyappan Subramanian wrote: > This patch adds network driver for APM X-Gene SoC ethernet. [] > diff --git a/drivers/net/ethernet/apm/xgene/Kconfig b/drivers/net/ethernet/apm/xgene/Kconfig [] > @@ -0,0 +1,10 @@ > +config NET_XGENE > + tristate "APM X-Gene SoC Ethernet Driver" > + select PHYLIB > + default y default y? Shouldn't this need a depends on too? > diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c > +static void xgene_enet_ring_set_type(u32 *ring_cfg, u8 is_bufpool) > +{ bool is_bufpool? > +static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring) > +{ > + u32 ring_id_val; > + u32 ring_id_buf; > + u8 is_bufpool = IS_FP(ring->id); bool? > + > + ring_id_val = ring->id & GENMASK(9, 0); > + ring_id_val |= (1 << 31) & GENMASK(31, 31); Setting a single bit and masking with the same bit looks silly. > + > + ring_id_buf = (ring->num << 9) & GENMASK(18, 9); > + ring_id_buf |= ((u32) is_bufpool << 20) & GENMASK(20, 20); And here. > + ring_id_buf |= (1U << 21) & GENMASK(21, 21); This too. [] > +static void xgene_enet_rd_mcx_stats(struct xgene_enet_pdata *pdata, > + u32 rd_addr, u32 *rd_data) > +{ [] > + if (!ret) > + netdev_err(pdata->ndev, "MCX stats read failed, addr: %04x", > + rd_addr); Missing newline > +/* Start Statistics related functions */ > +static void xgene_gmac_get_rx_stats(struct xgene_enet_pdata *pdata, > + struct xgene_enet_rx_stats *rx_stat) > +{ > + xgene_enet_rd_mcx_stats(pdata, RBYT_ADDR, &rx_stat->rx_byte_count); > + xgene_enet_rd_mcx_stats(pdata, RPKT_ADDR, &rx_stat->rx_packet_count); > + xgene_enet_rd_mcx_stats(pdata, RDRP_ADDR, &rx_stat->rx_drop_pkt_count); > + xgene_enet_rd_mcx_stats(pdata, RFCS_ADDR, &rx_stat->rx_fcs_err_count); > + xgene_enet_rd_mcx_stats(pdata, RFLR_ADDR, > + &rx_stat->rx_frm_len_err_pkt_count); > + xgene_enet_rd_mcx_stats(pdata, RALN_ADDR, > + &rx_stat->rx_alignment_err_pkt_count); > + xgene_enet_rd_mcx_stats(pdata, ROVR_ADDR, > + &rx_stat->rx_oversize_pkt_count); > + xgene_enet_rd_mcx_stats(pdata, RUND_ADDR, > + &rx_stat->rx_undersize_pkt_count); > + > + rx_stat->rx_byte_count &= RX_BYTE_CNTR_MASK; > + rx_stat->rx_packet_count &= RX_PKT_CNTR_MASK; > + rx_stat->rx_drop_pkt_count &= RX_DROPPED_PKT_CNTR_MASK; > + rx_stat->rx_fcs_err_count &= RX_FCS_ERROR_CNTR_MASK; > + rx_stat->rx_frm_len_err_pkt_count &= RX_LEN_ERR_CNTR_MASK; > + rx_stat->rx_alignment_err_pkt_count &= RX_ALIGN_ERR_CNTR_MASK; > + rx_stat->rx_oversize_pkt_count &= RX_OVRSIZE_PKT_CNTR_MASK; > + rx_stat->rx_undersize_pkt_count &= RX_UNDRSIZE_PKT_CNTR_MASK; > +} > + > +static void xgene_gmac_get_tx_stats(struct xgene_enet_pdata *pdata, > + struct xgene_enet_tx_stats *tx_stats) > +{ > + xgene_enet_rd_mcx_stats(pdata, TBYT_ADDR, &tx_stats->tx_byte_count); > + xgene_enet_rd_mcx_stats(pdata, TPKT_ADDR, &tx_stats->tx_pkt_count); > + xgene_enet_rd_mcx_stats(pdata, TDRP_ADDR, &tx_stats->tx_drop_frm_count); > + xgene_enet_rd_mcx_stats(pdata, TFCS_ADDR, > + &tx_stats->tx_fcs_err_frm_count); > + xgene_enet_rd_mcx_stats(pdata, TUND_ADDR, > + &tx_stats->tx_undersize_frm_count); > + > + tx_stats->tx_byte_count &= TX_BYTE_CNTR_MASK; > + tx_stats->tx_pkt_count &= TX_PKT_CNTR_MASK; > + tx_stats->tx_drop_frm_count &= TX_DROP_FRAME_CNTR_MASK; > + tx_stats->tx_fcs_err_frm_count &= TX_FCS_ERROR_CNTR_MASK; > + tx_stats->tx_undersize_frm_count &= TX_UNDSIZE_FRAME_CNTR_MASK; > +} Pity about the masks > +#define RX_BYTE_CNTR_MASK 0x7fffffff > +#define RX_PKT_CNTR_MASK 0x7fffffff > +#define RX_FCS_ERROR_CNTR_MASK 0x0000ffff > +#define RX_ALIGN_ERR_CNTR_MASK 0x0000ffff > +#define RX_LEN_ERR_CNTR_MASK 0x0000ffff > +#define RX_UNDRSIZE_PKT_CNTR_MASK 0x0000ffff > +#define RX_OVRSIZE_PKT_CNTR_MASK 0x0000ffff > +#define RX_DROPPED_PKT_CNTR_MASK 0x0000ffff > +#define TX_BYTE_CNTR_MASK 0x7fffffff > +#define TX_PKT_CNTR_MASK 0x7fffffff > +#define TX_DROP_FRAME_CNTR_MASK 0x0000ffff > +#define TX_FCS_ERROR_CNTR_MASK 0x00000fff > +#define TX_UNDSIZE_FRAME_CNTR_MASK 0x00000fff Any of these going to possibly overrun their counter size between polls? [] > +static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( > + struct net_device *ndev, u32 ring_num, > + enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) > +{ > + struct xgene_enet_desc_ring *ring; > + struct xgene_enet_pdata *pdata = netdev_priv(ndev); > + struct device *dev = &pdata->pdev->dev; > + u32 size; > + > + ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), > + GFP_KERNEL); > + if (!ring) { > + netdev_err(ndev, "Could not allocate ring\n"); Unnecessary OOM. alloc errors get a generic OOM and dump_stack() > +static struct net_device_stats *xgene_enet_stats(struct net_device *ndev) > +{ > + struct xgene_enet_pdata *pdata = netdev_priv(ndev); > + struct net_device_stats *nst = &pdata->nstats; > + struct xgene_enet_detailed_stats detailed_stats; > + struct xgene_enet_rx_stats *rx_stats; > + struct xgene_enet_tx_stats *tx_stats; > + u32 pkt_bytes, crc_bytes = 4; > + > + memset(&detailed_stats, 0, sizeof(struct xgene_enet_detailed_stats)); > + > + rx_stats = &detailed_stats.rx_stats; > + tx_stats = &detailed_stats.tx_stats; > + > + local_irq_disable(); > + xgene_gmac_get_detailed_stats(pdata, &detailed_stats); > + > + pkt_bytes = rx_stats->rx_byte_count; > + pkt_bytes -= rx_stats->rx_packet_count * crc_bytes; > + nst->rx_packets += rx_stats->rx_packet_count; > + nst->rx_bytes += pkt_bytes; > + > + pkt_bytes = tx_stats->tx_byte_count; > + pkt_bytes -= tx_stats->tx_pkt_count * crc_bytes; > + nst->tx_packets += tx_stats->tx_pkt_count; > + nst->tx_bytes += pkt_bytes; > + > + nst->rx_dropped += rx_stats->rx_drop_pkt_count; > + nst->tx_dropped += tx_stats->tx_drop_frm_count; > + > + nst->rx_crc_errors += rx_stats->rx_fcs_err_count; > + nst->rx_length_errors += rx_stats->rx_frm_len_err_pkt_count; > + nst->rx_frame_errors += rx_stats->rx_alignment_err_pkt_count; > + nst->rx_over_errors += rx_stats->rx_oversize_pkt_count; > + > + nst->rx_errors += rx_stats->rx_fcs_err_count > + + rx_stats->rx_frm_len_err_pkt_count > + + rx_stats->rx_oversize_pkt_count > + + rx_stats->rx_undersize_pkt_count; > + > + nst->tx_errors += tx_stats->tx_fcs_err_frm_count + > + tx_stats->tx_undersize_frm_count; > + > + local_irq_enable(); > + > + return nst; > +} -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html