netdev - Re: [PATCH net-next v21 02/13] rtase: Implement the .ndo

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Date: Thu, 27 Jun 2024 12:41:34 -0400
From: Joe Damato <jdamato@...tly.com>
To: Justin Lai <justinlai0215@...ltek.com>
Cc: kuba@...nel.org, davem@...emloft.net, edumazet@...gle.com,
	pabeni@...hat.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, andrew@...n.ch, jiri@...nulli.us,
	horms@...nel.org, rkannoth@...vell.com, pkshih@...ltek.com,
	larry.chiu@...ltek.com
Subject: Re: [PATCH net-next v21 02/13] rtase: Implement the .ndo_open
 function

On Mon, Jun 24, 2024 at 02:28:10PM +0800, Justin Lai wrote:

[...]

> +static int rtase_open(struct net_device *dev)
> +{
> +	struct rtase_private *tp = netdev_priv(dev);
> +	const struct pci_dev *pdev = tp->pdev;
> +	struct rtase_int_vector *ivec;
> +	u16 i = 0, j;
> +	int ret;
> +
> +	ivec = &tp->int_vector[0];
> +	tp->rx_buf_sz = RTASE_RX_BUF_SIZE;
> +
> +	ret = rtase_alloc_desc(tp);
> +	if (ret)
> +		return ret;
> +
> +	ret = rtase_init_ring(dev);
> +	if (ret)
> +		goto err_free_all_allocated_mem;
> +
> +	rtase_hw_config(dev);
> +
> +	if (tp->sw_flag & RTASE_SWF_MSIX_ENABLED) {
> +		ret = request_irq(ivec->irq, rtase_interrupt, 0,
> +				  dev->name, ivec);
> +		if (ret)
> +			goto err_free_all_allocated_irq;
> +
> +		/* request other interrupts to handle multiqueue */
> +		for (i = 1; i < tp->int_nums; i++) {
> +			ivec = &tp->int_vector[i];
> +			snprintf(ivec->name, sizeof(ivec->name), "%s_int%i",
> +				 tp->dev->name, i);
> +			ret = request_irq(ivec->irq, rtase_q_interrupt, 0,
> +					  ivec->name, ivec);
> +			if (ret)
> +				goto err_free_all_allocated_irq;
> +		}
> +	} else {
> +		ret = request_irq(pdev->irq, rtase_interrupt, 0, dev->name,
> +				  ivec);
> +		if (ret)
> +			goto err_free_all_allocated_mem;
> +	}
> +
> +	rtase_hw_start(dev);
> +
> +	for (i = 0; i < tp->int_nums; i++) {
> +		ivec = &tp->int_vector[i];
> +		napi_enable(&ivec->napi);

nit / suggestion for the future (not to hold this back): it'd be
nice to add support for netif_napi_set_irq and netif_queue_set_napi
so that userland can use netdev-genl to get queue/irq/napi mappings.