On Fri, 2015-01-23 at 10:07 +0000, Stathis Voukelatos wrote:
> This patch adds support the Ethernet Packet Sniffer H/W module
> developed by Linn Products Ltd and found in the IMG Pistachio SoC.
> The module allows Ethernet packets to be parsed, matched against
> a user-defined pattern and timestamped. It sits between a 100M
> Ethernet MAC and PHY and is completely passive with respect to
> Ethernet frames.
[]
> include/linux/pkt_sniffer.h | 89 +++++
Why should this file be here?
Why not in the drivers/net/pkt-sniffer directory?
> diff --git a/drivers/net/pkt-sniffer/backends/ether/channel.c b/drivers/net/pkt-sniffer/backends/ether/channel.c
[]
> +static int esnf_start(struct snf_chan *dev);
Be nice to rearrange the code to avoid the forward declarations.
> +static int esnf_stop(struct snf_chan *dev);
> +static int esnf_set_pattern(struct snf_chan *dev, const u8 *pattern, int count);
> +static int esnf_num_recs_avail(struct snf_chan *dev);
> +static int esnf_max_ptn_entries(struct snf_chan *dev);
> +static int esnf_max_match_bytes(struct snf_chan *dev);
> +static int validate_pattern(
> + struct ether_snf_chan *ch,
> + const u8 *buf,
> + int count);
[]
> +static int validate_pattern(struct ether_snf_chan *ch, const u8 *buf, int count)
> +{
Maybe better as bool
> + int i, complete, max_copy_bytes;
[]
> + /* Check if the string was properly terminated
> + * and contained valid number of commands
> + */
> + if (complete) {
> + max_copy_bytes = ch->fifo_blk_words * 4;
> + if (ts)
> + max_copy_bytes -= 4;
> + if ((copy_before + copy_after) > max_copy_bytes)
> + return 0;
> + ch->ts_present = ts;
> + ch->nfb_before = copy_before;
> + ch->nfb_after = copy_after;
> + return 1;
> + } else {
> + return 0;
> + }
return complete;
[]
> +/* Interrupt thread function */
> +static irqreturn_t esnf_irq_thread(int irq, void *dev_id)
> +{
> + struct platform_device *pdev = (struct platform_device *)dev_id;
> + struct ether_snf *esnf = (struct ether_snf *)platform_get_drvdata(pdev);
> + u32 irq_status;
> +
> + if (unlikely(esnf->irq != irq))
> + return IRQ_NONE;
> +
> + irq_status = ioread32(esnf->regs + INTERRUPT_STATUS) &
> + ioread32(esnf->regs + INTERRUPT_ENABLE);
> +
> + dev_dbg(&pdev->dev, "irq: 0x%08x\n", irq_status);
> +
> + /* TX FIFO full */
> + if (unlikely(irq_status & TX_FULL_IRQ_BIT))
> + dev_notice(&pdev->dev, "TX FIFO full");
Missing terminating newlines
> +
> + /* RX FIFO full */
> + if (unlikely(irq_status & RX_FULL_IRQ_BIT))
> + dev_notice(&pdev->dev, "RX FIFO full");
> +
> + /* TX match data available */
> + if (irq_status & TX_DATA_IRQ_BIT) {
> + dev_dbg(&pdev->dev, "TX data");
> + channel_data_available(&esnf->txc);
> + }
> +
> + /* RX match data available */
> + if (irq_status & RX_DATA_IRQ_BIT) {
> + dev_dbg(&pdev->dev, "RX data");
> + channel_data_available(&esnf->rxc);
> + }
> diff --git a/drivers/net/pkt-sniffer/core/nl.c b/drivers/net/pkt-sniffer/core/nl.c
[]
> +int snf_netlink_init(int id, struct snf_chan *dev, const char *name)
> +{
[]
> + /* Allocate ops array and copy template data */
> + nl->ops = kmalloc(sizeof(snf_ops_tmpl), GFP_KERNEL);
> + if (!nl->ops) {
> + ret = -ENOMEM;
> + goto fail2;
> + }
> + memcpy(nl->ops, snf_ops_tmpl, sizeof(snf_ops_tmpl));
kmemdup
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