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Commit de218073 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'enic-Additional-ethtool-support' 



Parvi Kaustubhi says:

====================
enic: Additional ethtool support

This patch set allows the user to show or modify rx/tx ring sizes using
ethtool.

v2:
- remove unused variable to fix build warning.
- update list of maintainers for cisco vic ethernet nic driver.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 59c1cecc 8af67d34

MAINTAINERS

+1 −1
Original line number Diff line number Diff line
@@ -3422,7 +3422,7 @@ F: drivers/scsi/snic/ 
CISCO VIC ETHERNET NIC DRIVER

M:	Christian Benvenuti <benve@cisco.com>

M:	Govindarajulu Varadarajan <_govind@gmx.com>

M:	Neel Patel <neepatel@cisco.com>

M:	Parvi Kaustubhi <pkaustub@cisco.com>

S:	Supported

F:	drivers/net/ethernet/cisco/enic/

drivers/net/ethernet/cisco/enic/enic.h

+1 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ 


#define DRV_NAME		"enic"

#define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"

#define DRV_VERSION		"2.3.0.42"

#define DRV_VERSION		"2.3.0.45"

#define DRV_COPYRIGHT		"Copyright 2008-2013 Cisco Systems, Inc"



#define ENIC_BARS_MAX		6

drivers/net/ethernet/cisco/enic/enic_ethtool.c

+77 −0
Original line number Diff line number Diff line
@@ -176,6 +176,81 @@ static void enic_get_strings(struct net_device *netdev, u32 stringset, 
	}

}



static void enic_get_ringparam(struct net_device *netdev,

			       struct ethtool_ringparam *ring)

{

	struct enic *enic = netdev_priv(netdev);

	struct vnic_enet_config *c = &enic->config;



	ring->rx_max_pending = ENIC_MAX_RQ_DESCS;

	ring->rx_pending = c->rq_desc_count;

	ring->tx_max_pending = ENIC_MAX_WQ_DESCS;

	ring->tx_pending = c->wq_desc_count;

}



static int enic_set_ringparam(struct net_device *netdev,

			      struct ethtool_ringparam *ring)

{

	struct enic *enic = netdev_priv(netdev);

	struct vnic_enet_config *c = &enic->config;

	int running = netif_running(netdev);

	unsigned int rx_pending;

	unsigned int tx_pending;

	int err = 0;



	if (ring->rx_mini_max_pending || ring->rx_mini_pending) {

		netdev_info(netdev,

			    "modifying mini ring params is not supported");

		return -EINVAL;

	}

	if (ring->rx_jumbo_max_pending || ring->rx_jumbo_pending) {

		netdev_info(netdev,

			    "modifying jumbo ring params is not supported");

		return -EINVAL;

	}

	rx_pending = c->rq_desc_count;

	tx_pending = c->wq_desc_count;

	if (ring->rx_pending > ENIC_MAX_RQ_DESCS ||

	    ring->rx_pending < ENIC_MIN_RQ_DESCS) {

		netdev_info(netdev, "rx pending (%u) not in range [%u,%u]",

			    ring->rx_pending, ENIC_MIN_RQ_DESCS,

			    ENIC_MAX_RQ_DESCS);

		return -EINVAL;

	}

	if (ring->tx_pending > ENIC_MAX_WQ_DESCS ||

	    ring->tx_pending < ENIC_MIN_WQ_DESCS) {

		netdev_info(netdev, "tx pending (%u) not in range [%u,%u]",

			    ring->tx_pending, ENIC_MIN_WQ_DESCS,

			    ENIC_MAX_WQ_DESCS);

		return -EINVAL;

	}

	if (running)

		dev_close(netdev);

	c->rq_desc_count =

		ring->rx_pending & 0xffffffe0; /* must be aligned to groups of 32 */

	c->wq_desc_count =

		ring->tx_pending & 0xffffffe0; /* must be aligned to groups of 32 */

	enic_free_vnic_resources(enic);

	err = enic_alloc_vnic_resources(enic);

	if (err) {

		netdev_err(netdev,

			   "Failed to alloc vNIC resources, aborting\n");

		enic_free_vnic_resources(enic);

		goto err_out;

	}

	enic_init_vnic_resources(enic);

	if (running) {

		err = dev_open(netdev);

		if (err)

			goto err_out;

	}

	return 0;

err_out:

	c->rq_desc_count = rx_pending;

	c->wq_desc_count = tx_pending;

	return err;

}



static int enic_get_sset_count(struct net_device *netdev, int sset)

{

	switch (sset) {
@@ -509,6 +584,8 @@ static const struct ethtool_ops enic_ethtool_ops = { 
	.set_msglevel = enic_set_msglevel,

	.get_link = ethtool_op_get_link,

	.get_strings = enic_get_strings,

	.get_ringparam = enic_get_ringparam,

	.set_ringparam = enic_set_ringparam,

	.get_sset_count = enic_get_sset_count,

	.get_ethtool_stats = enic_get_ethtool_stats,

	.get_coalesce = enic_get_coalesce,

drivers/net/ethernet/cisco/enic/vnic_rq.c

+2 −14
Original line number Diff line number Diff line
@@ -139,19 +139,7 @@ void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, 
	unsigned int error_interrupt_enable,

	unsigned int error_interrupt_offset)

{

	u32 fetch_index = 0;



	/* Use current fetch_index as the ring starting point */

	fetch_index = ioread32(&rq->ctrl->fetch_index);



	if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone  */

		/* Hardware surprise removal: reset fetch_index */

		fetch_index = 0;

	}



	vnic_rq_init_start(rq, cq_index,

		fetch_index, fetch_index,

		error_interrupt_enable,

	vnic_rq_init_start(rq, cq_index, 0, 0, error_interrupt_enable,

			   error_interrupt_offset);

}