Re: [dpdk-dev] [PATCH v5 08/20] event/sw: add support for linking queues to ports

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

On Fri, Mar 24, 2017 at 04:53:03PM +0000, Harry van Haaren wrote:
> From: Bruce Richardson <bruce.richardson@intel.com>
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
> ---
>  drivers/event/sw/sw_evdev.c | 81 +++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 81 insertions(+)
> 
> diff --git a/drivers/event/sw/sw_evdev.c b/drivers/event/sw/sw_evdev.c
> index 4b8370d..82ac3bd 100644
> --- a/drivers/event/sw/sw_evdev.c
> +++ b/drivers/event/sw/sw_evdev.c
> @@ -36,6 +36,7 @@
>  #include <rte_memzone.h>
>  #include <rte_kvargs.h>
>  #include <rte_ring.h>
> +#include <rte_errno.h>
>  
>  #include "sw_evdev.h"
>  #include "iq_ring.h"
> @@ -50,6 +51,84 @@ static void
>  sw_info_get(struct rte_eventdev *dev, struct rte_event_dev_info *info);
>  
>  static int
> +sw_port_link(struct rte_eventdev *dev, void *port, const uint8_t queues[],
> +		const uint8_t priorities[], uint16_t num)
> +{
> +	struct sw_port *p = (void *)port;

(void *) typecast is not required.

> +	struct sw_evdev *sw = sw_pmd_priv(dev);
> +	int i;
> +
> +	RTE_SET_USED(priorities);
> +	for (i = 0; i < num; i++) {
> +		struct sw_qid *q = &sw->qids[queues[i]];
> +
> +		/* check for qid map overflow */
> +		if (q->cq_num_mapped_cqs >= RTE_DIM(q->cq_map))
> +			break;
> +
> +		if (p->is_directed && p->num_qids_mapped > 0)

Do we need to set rte_errno = -EDQUOT here too?

> +			break;
> +
> +		if (q->type == SW_SCHED_TYPE_DIRECT) {
> +			/* check directed qids only map to one port */
> +			if (p->num_qids_mapped > 0) {
> +				rte_errno = -EDQUOT;
> +				break;
> +			}
> +			/* check port only takes a directed flow */
> +			if (num > 1) {
> +				rte_errno = -EDQUOT;
> +				break;
> +			}
> +
> +			p->is_directed = 1;
> +			p->num_qids_mapped = 1;
> +		} else if (q->type == RTE_SCHED_TYPE_ORDERED) {

Will this "else if" have similar issue shared in
http://dpdk.org/ml/archives/dev/2017-March/061497.html

> +			p->num_ordered_qids++;
> +			p->num_qids_mapped++;
> +		} else if (q->type == RTE_SCHED_TYPE_ATOMIC) {
> +			p->num_qids_mapped++;
> +		}
> +
> +		q->cq_map[q->cq_num_mapped_cqs] = p->id;
> +		rte_smp_wmb();
> +		q->cq_num_mapped_cqs++;
> +	}
> +	return i;
> +}
> +
> +static int
> +sw_port_unlink(struct rte_eventdev *dev, void *port, uint8_t queues[],
> +		uint16_t nb_unlinks)
> +{
> +	struct sw_port *p = (void *)port;

(void *) typecast is not required.

> +	struct sw_evdev *sw = sw_pmd_priv(dev);
> +	unsigned int i, j;
> +
> +	int unlinked = 0;
> +	for (i = 0; i < nb_unlinks; i++) {
> +		struct sw_qid *q = &sw->qids[queues[i]];
> +		for (j = 0; j < q->cq_num_mapped_cqs; j++) {
> +			if (q->cq_map[j] == p->id) {
> +				q->cq_map[j] =
> +					q->cq_map[q->cq_num_mapped_cqs - 1];
> +				rte_smp_wmb();
> +				q->cq_num_mapped_cqs--;
> +				unlinked++;
> +
> +				p->num_qids_mapped--;
> +
> +				if (q->type == RTE_SCHED_TYPE_ORDERED)
> +					p->num_ordered_qids--;
> +
> +				continue;
> +			}
> +		}
> +	}
> +	return unlinked;
> +}
> +

With above suggested changes,

Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>