Release 4.7 drivers/net/ethernet/cisco/enic/enic_main.c

Directory: drivers/net/ethernet/cisco/enic
/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <linux/rtnetlink.h>
#include <linux/prefetch.h>
#include <net/ip6_checksum.h>
#include <linux/ktime.h>
#include <linux/numa.h>
#ifdef CONFIG_RFS_ACCEL
#include <linux/cpu_rmap.h>
#endif
#ifdef CONFIG_NET_RX_BUSY_POLL
#include <net/busy_poll.h>
#endif
#include <linux/crash_dump.h>

#include "cq_enet_desc.h"
#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "vnic_vic.h"
#include "enic_res.h"
#include "enic.h"
#include "enic_dev.h"
#include "enic_pp.h"
#include "enic_clsf.h"


#define ENIC_NOTIFY_TIMER_PERIOD	(2 * HZ)

#define WQ_ENET_MAX_DESC_LEN		(1 << WQ_ENET_LEN_BITS)

#define MAX_TSO				(1 << 16)

#define ENIC_DESC_MAX_SPLITS		(MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)


#define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  
/* ethernet vnic */

#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  
/* enet dynamic vnic */

#define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  
/* enet SRIOV VF */


#define RX_COPYBREAK_DEFAULT		256

/* Supported devices */

static const struct pci_device_id enic_id_table[] = {
	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
	{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
	{ 0, }	/* end of table */
};


MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
MODULE_LICENSE("GPL");

MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, enic_id_table);


#define ENIC_LARGE_PKT_THRESHOLD		1000

#define ENIC_MAX_COALESCE_TIMERS		10
/*  Interrupt moderation table, which will be used to decide the
 *  coalescing timer values
 *  {rx_rate in Mbps, mapping percentage of the range}
 */

static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
	{4000,  0},
	{4400, 10},
	{5060, 20},
	{5230, 30},
	{5540, 40},
	{5820, 50},
	{6120, 60},
	{6435, 70},
	{6745, 80},
	{7000, 90},
	{0xFFFFFFFF, 100}
};

/* This table helps the driver to pick different ranges for rx coalescing
 * timer depending on the link speed.
 */

static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
	{0,  0}, /* 0  - 4  Gbps */
	{0,  3}, /* 4  - 10 Gbps */
	{3,  6}, /* 10 - 40 Gbps */
};



static void enic_init_affinity_hint(struct enic *enic)
{
	int numa_node = dev_to_node(&enic->pdev->dev);
	int i;

	for (i = 0; i < enic->intr_count; i++) {
		if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) ||
		    (enic->msix[i].affinity_mask &&
		     !cpumask_empty(enic->msix[i].affinity_mask)))
			continue;
		if (zalloc_cpumask_var(&enic->msix[i].affinity_mask,
				       GFP_KERNEL))
			cpumask_set_cpu(cpumask_local_spread(i, numa_node),
					enic->msix[i].affinity_mask);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 121 100.00% 1 100.00%
Total 121 100.00% 1 100.00%



static void enic_free_affinity_hint(struct enic *enic)
{
	int i;

	for (i = 0; i < enic->intr_count; i++) {
		if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i))
			continue;
		free_cpumask_var(enic->msix[i].affinity_mask);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%



static void enic_set_affinity_hint(struct enic *enic)
{
	int i;
	int err;

	for (i = 0; i < enic->intr_count; i++) {
		if (enic_is_err_intr(enic, i)		||
		    enic_is_notify_intr(enic, i)	||
		    !enic->msix[i].affinity_mask	||
		    cpumask_empty(enic->msix[i].affinity_mask))
			continue;
		err = irq_set_affinity_hint(enic->msix_entry[i].vector,
					    enic->msix[i].affinity_mask);
		if (err)
			netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n",
				    err);
	}

	for (i = 0; i < enic->wq_count; i++) {
		int wq_intr = enic_msix_wq_intr(enic, i);

		if (enic->msix[wq_intr].affinity_mask &&
		    !cpumask_empty(enic->msix[wq_intr].affinity_mask))
			netif_set_xps_queue(enic->netdev,
					    enic->msix[wq_intr].affinity_mask,
					    i);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 180 100.00% 1 100.00%
Total 180 100.00% 1 100.00%



static void enic_unset_affinity_hint(struct enic *enic)
{
	int i;

	for (i = 0; i < enic->intr_count; i++)
		irq_set_affinity_hint(enic->msix_entry[i].vector, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 43 100.00% 1 100.00%
Total 43 100.00% 1 100.00%



int enic_is_dynamic(struct enic *enic)
{
	return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
}

Contributors
Person Tokens Prop Commits CommitProp
neel patel neel patel 16 84.21% 1 50.00%
scott feldman scott feldman 3 15.79% 1 50.00%
Total 19 100.00% 2 100.00%



int enic_sriov_enabled(struct enic *enic)
{
	return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
neel patel neel patel 19 82.61% 1 50.00%
scott feldman scott feldman 4 17.39% 1 50.00%
Total 23 100.00% 2 100.00%



static int enic_is_sriov_vf(struct enic *enic)
{
	return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
}

Contributors
Person Tokens Prop Commits CommitProp
neel patel neel patel 17 85.00% 1 50.00%
scott feldman scott feldman 3 15.00% 1 50.00%
Total 20 100.00% 2 100.00%



int enic_is_valid_vf(struct enic *enic, int vf)
{
#ifdef CONFIG_PCI_IOV
	return vf >= 0 && vf < enic->num_vfs;
#else
	return 0;
#endif
}

Contributors
Person Tokens Prop Commits CommitProp
neel patel neel patel 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
{
	struct enic *enic = vnic_dev_priv(wq->vdev);

	if (buf->sop)
		pci_unmap_single(enic->pdev, buf->dma_addr,
			buf->len, PCI_DMA_TODEVICE);
	else
		pci_unmap_page(enic->pdev, buf->dma_addr,
			buf->len, PCI_DMA_TODEVICE);

	if (buf->os_buf)
		dev_kfree_skb_any(buf->os_buf);
}

Contributors
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scott feldman scott feldman 82 100.00% 1 100.00%
Total 82 100.00% 1 100.00%



static void enic_wq_free_buf(struct vnic_wq *wq,
	struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
{
	enic_free_wq_buf(wq, buf);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
	u8 type, u16 q_number, u16 completed_index, void *opaque)
{
	struct enic *enic = vnic_dev_priv(vdev);

	spin_lock(&enic->wq_lock[q_number]);

	vnic_wq_service(&enic->wq[q_number], cq_desc,
		completed_index, enic_wq_free_buf,
		opaque);

	if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
	    vnic_wq_desc_avail(&enic->wq[q_number]) >=
	    (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
		netif_wake_subqueue(enic->netdev, q_number);

	spin_unlock(&enic->wq_lock[q_number]);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 114 92.68% 2 66.67%
govindarajulu.v govindarajulu.v 9 7.32% 1 33.33%
Total 123 100.00% 3 100.00%



static bool enic_log_q_error(struct enic *enic)
{
	unsigned int i;
	u32 error_status;
	bool err = false;

	for (i = 0; i < enic->wq_count; i++) {
		error_status = vnic_wq_error_status(&enic->wq[i]);
		err |= error_status;
		if (error_status)
			netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
				i, error_status);
	}

	for (i = 0; i < enic->rq_count; i++) {
		error_status = vnic_rq_error_status(&enic->rq[i]);
		err |= error_status;
		if (error_status)
			netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
				i, error_status);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 95 74.22% 1 33.33%
govindarajulu varadarajan govindarajulu varadarajan 17 13.28% 1 33.33%
vasanthy kolluri vasanthy kolluri 16 12.50% 1 33.33%
Total 128 100.00% 3 100.00%



static void enic_msglvl_check(struct enic *enic)
{
	u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);

	if (msg_enable != enic->msg_enable) {
		netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
			enic->msg_enable, msg_enable);
		enic->msg_enable = msg_enable;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 30 57.69% 1 33.33%
vasanthy kolluri vasanthy kolluri 22 42.31% 2 66.67%
Total 52 100.00% 3 100.00%



static void enic_mtu_check(struct enic *enic)
{
	u32 mtu = vnic_dev_mtu(enic->vdev);
	struct net_device *netdev = enic->netdev;

	if (mtu && mtu != enic->port_mtu) {
		enic->port_mtu = mtu;
		if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
			mtu = max_t(int, ENIC_MIN_MTU,
				min_t(int, ENIC_MAX_MTU, mtu));
			if (mtu != netdev->mtu)
				schedule_work(&enic->change_mtu_work);
		} else {
			if (mtu < netdev->mtu)
				netdev_warn(netdev,
					"interface MTU (%d) set higher "
					"than switch port MTU (%d)\n",
					netdev->mtu, mtu);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 52 42.98% 3 50.00%
roopa prabhu roopa prabhu 51 42.15% 2 33.33%
vasanthy kolluri vasanthy kolluri 18 14.88% 1 16.67%
Total 121 100.00% 6 100.00%



static void enic_link_check(struct enic *enic)
{
	int link_status = vnic_dev_link_status(enic->vdev);
	int carrier_ok = netif_carrier_ok(enic->netdev);

	if (link_status && !carrier_ok) {
		netdev_info(enic->netdev, "Link UP\n");
		netif_carrier_on(enic->netdev);
	} else if (!link_status && carrier_ok) {
		netdev_info(enic->netdev, "Link DOWN\n");
		netif_carrier_off(enic->netdev);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 52 63.41% 2 66.67%
scott feldman scott feldman 30 36.59% 1 33.33%
Total 82 100.00% 3 100.00%



static void enic_notify_check(struct enic *enic)
{
	enic_msglvl_check(enic);
	enic_mtu_check(enic);
	enic_link_check(enic);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%


#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))



static irqreturn_t enic_isr_legacy(int irq, void *data)
{
	struct net_device *netdev = data;
	struct enic *enic = netdev_priv(netdev);
	unsigned int io_intr = enic_legacy_io_intr();
	unsigned int err_intr = enic_legacy_err_intr();
	unsigned int notify_intr = enic_legacy_notify_intr();
	u32 pba;

	vnic_intr_mask(&enic->intr[io_intr]);

	pba = vnic_intr_legacy_pba(enic->legacy_pba);
	if (!pba) {
		vnic_intr_unmask(&enic->intr[io_intr]);
		return IRQ_NONE;	/* not our interrupt */
	}

	if (ENIC_TEST_INTR(pba, notify_intr)) {
		enic_notify_check(enic);
		vnic_intr_return_all_credits(&enic->intr[notify_intr]);
	}

	if (ENIC_TEST_INTR(pba, err_intr)) {
		vnic_intr_return_all_credits(&enic->intr[err_intr]);
		enic_log_q_error(enic);
		/* schedule recovery from WQ/RQ error */
		schedule_work(&enic->reset);
		return IRQ_HANDLED;
	}

	if (ENIC_TEST_INTR(pba, io_intr))
		napi_schedule_irqoff(&enic->napi[0]);
	else
		vnic_intr_unmask(&enic->intr[io_intr]);

	return IRQ_HANDLED;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 152 77.16% 2 40.00%
vasanthy kolluri vasanthy kolluri 39 19.80% 1 20.00%
sujith sankar sujith sankar 5 2.54% 1 20.00%
govindarajulu varadarajan govindarajulu varadarajan 1 0.51% 1 20.00%
Total 197 100.00% 5 100.00%



static irqreturn_t enic_isr_msi(int irq, void *data)
{
	struct enic *enic = data;

	/* With MSI, there is no sharing of interrupts, so this is
         * our interrupt and there is no need to ack it.  The device
         * is not providing per-vector masking, so the OS will not
         * write to PCI config space to mask/unmask the interrupt.
         * We're using mask_on_assertion for MSI, so the device
         * automatically masks the interrupt when the interrupt is
         * generated.  Later, when exiting polling, the interrupt
         * will be unmasked (see enic_poll).
         *
         * Also, the device uses the same PCIe Traffic Class (TC)
         * for Memory Write data and MSI, so there are no ordering
         * issues; the MSI will always arrive at the Root Complex
         * _after_ corresponding Memory Writes (i.e. descriptor
         * writes).
         */

	napi_schedule_irqoff(&enic->napi[0]);

	return IRQ_HANDLED;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 31 88.57% 1 33.33%
vasanthy kolluri vasanthy kolluri 3 8.57% 1 33.33%
govindarajulu varadarajan govindarajulu varadarajan 1 2.86% 1 33.33%
Total 35 100.00% 3 100.00%



static irqreturn_t enic_isr_msix(int irq, void *data)
{
	struct napi_struct *napi = data;

	napi_schedule_irqoff(napi);

	return IRQ_HANDLED;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 24 85.71% 1 25.00%
govindarajulu varadarajan govindarajulu varadarajan 2 7.14% 2 50.00%
vasanthy kolluri vasanthy kolluri 2 7.14% 1 25.00%
Total 28 100.00% 4 100.00%



static irqreturn_t enic_isr_msix_err(int irq, void *data)
{
	struct enic *enic = data;
	unsigned int intr = enic_msix_err_intr(enic);

	vnic_intr_return_all_credits(&enic->intr[intr]);

	if (enic_log_q_error(enic))
		/* schedule recovery from WQ/RQ error */
		schedule_work(&enic->reset);

	return IRQ_HANDLED;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 46 77.97% 2 50.00%
vasanthy kolluri vasanthy kolluri 10 16.95% 1 25.00%
govindarajulu varadarajan govindarajulu varadarajan 3 5.08% 1 25.00%
Total 59 100.00% 4 100.00%



static irqreturn_t enic_isr_msix_notify(int irq, void *data)
{
	struct enic *enic = data;
	unsigned int intr = enic_msix_notify_intr(enic);

	enic_notify_check(enic);
	vnic_intr_return_all_credits(&enic->intr[intr]);

	return IRQ_HANDLED;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 33 68.75% 2 50.00%
vasanthy kolluri vasanthy kolluri 10 20.83% 1 25.00%
sujith sankar sujith sankar 5 10.42% 1 25.00%
Total 48 100.00% 4 100.00%



static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
				  struct sk_buff *skb, unsigned int len_left,
				  int loopback)
{
	const skb_frag_t *frag;
	dma_addr_t dma_addr;

	/* Queue additional data fragments */
	for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
		len_left -= skb_frag_size(frag);
		dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
					    skb_frag_size(frag),
					    DMA_TO_DEVICE);
		if (unlikely(enic_dma_map_check(enic, dma_addr)))
			return -ENOMEM;
		enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
					(len_left == 0),	/* EOP? */
					loopback);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 72 56.69% 1 16.67%
govindarajulu varadarajan govindarajulu varadarajan 33 25.98% 1 16.67%
eric dumazet eric dumazet 10 7.87% 1 16.67%
ian campbell ian campbell 6 4.72% 2 33.33%
vasanthy kolluri vasanthy kolluri 6 4.72% 1 16.67%
Total 127 100.00% 6 100.00%



static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
				  struct sk_buff *skb, int vlan_tag_insert,
				  unsigned int vlan_tag, int loopback)
{
	unsigned int head_len = skb_headlen(skb);
	unsigned int len_left = skb->len - head_len;
	int eop = (len_left == 0);
	dma_addr_t dma_addr;
	int err = 0;

	dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
				  PCI_DMA_TODEVICE);
	if (unlikely(enic_dma_map_check(enic, dma_addr)))
		return -ENOMEM;

	/* Queue the main skb fragment. The fragments are no larger
         * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
         * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
         * per fragment is queued.
         */
	enic_queue_wq_desc(wq, skb, dma_addr, head_len,	vlan_tag_insert,
			   vlan_tag, eop, loopback);

	if (!eop)
		err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 95 66.43% 1 33.33%
govindarajulu varadarajan govindarajulu varadarajan 41 28.67% 1 33.33%
vasanthy kolluri vasanthy kolluri 7 4.90% 1 33.33%
Total 143 100.00% 3 100.00%



static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
				     struct sk_buff *skb, int vlan_tag_insert,
				     unsigned int vlan_tag, int loopback)
{
	unsigned int head_len = skb_headlen(skb);
	unsigned int len_left = skb->len - head_len;
	unsigned int hdr_len = skb_checksum_start_offset(skb);
	unsigned int csum_offset = hdr_len + skb->csum_offset;
	int eop = (len_left == 0);
	dma_addr_t dma_addr;
	int err = 0;

	dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
				  PCI_DMA_TODEVICE);
	if (unlikely(enic_dma_map_check(enic, dma_addr)))
		return -ENOMEM;

	/* Queue the main skb fragment. The fragments are no larger
         * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
         * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
         * per fragment is queued.
         */
	enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len,	csum_offset,
				   hdr_len, vlan_tag_insert, vlan_tag, eop,
				   loopback);

	if (!eop)
		err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 117 70.48% 1 25.00%
govindarajulu varadarajan govindarajulu varadarajan 41 24.70% 1 25.00%
vasanthy kolluri vasanthy kolluri 7 4.22% 1 25.00%
michal miroslaw michal miroslaw 1 0.60% 1 25.00%
Total 166 100.00% 4 100.00%



static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
				 struct sk_buff *skb, unsigned int mss,
				 int vlan_tag_insert, unsigned int vlan_tag,
				 int loopback)
{
	unsigned int frag_len_left = skb_headlen(skb);
	unsigned int len_left = skb->len - frag_len_left;
	unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
	int eop = (len_left == 0);
	unsigned int len;
	dma_addr_t dma_addr;
	unsigned int offset = 0;
	skb_frag_t *frag;

	/* Preload TCP csum field with IP pseudo hdr calculated
         * with IP length set to zero.  HW will later add in length
         * to each TCP segment resulting from the TSO.
         */

	if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
		ip_hdr(skb)->check = 0;
		tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
			ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
	} else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
		tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
			&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
	}

	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
         * for the main skb fragment
         */
	while (frag_len_left) {
		len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
		dma_addr = pci_map_single(enic->pdev, skb->data + offset, len,
					  PCI_DMA_TODEVICE);
		if (unlikely(enic_dma_map_check(enic, dma_addr)))
			return -ENOMEM;
		enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
				       vlan_tag_insert, vlan_tag,
				       eop && (len == frag_len_left), loopback);
		frag_len_left -= len;
		offset += len;
	}

	if (eop)
		return 0;

	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
         * for additional data fragments
         */
	for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
		len_left -= skb_frag_size(frag);
		frag_len_left = skb_frag_size(frag);
		offset = 0;

		while (frag_len_left) {
			len = min(frag_len_left,
				(unsigned int)WQ_ENET_MAX_DESC_LEN);
			dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
						    offset, len,
						    DMA_TO_DEVICE);
			if (unlikely(enic_dma_map_check(enic, dma_addr)))
				return -ENOMEM;
			enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
						(len_left == 0) &&
						 (len == frag_len_left),/*EOP*/
						loopback);
			frag_len_left -= len;
			offset += len;
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 362 85.58% 2 25.00%
govindarajulu varadarajan govindarajulu varadarajan 40 9.46% 1 12.50%
vasanthy kolluri vasanthy kolluri 7 1.65% 1 12.50%
ian campbell ian campbell 6 1.42% 2 25.00%
eric dumazet eric dumazet 6 1.42% 1 12.50%
harvey harrison harvey harrison 2 0.47% 1 12.50%
Total 423 100.00% 8 100.00%



static inline void enic_queue_wq_skb(struct enic *enic,
	struct vnic_wq *wq, struct sk_buff *skb)
{
	unsigned int mss = skb_shinfo(skb)->gso_size;
	unsigned int vlan_tag = 0;
	int vlan_tag_insert = 0;
	int loopback = 0;
	int err;

	if (skb_vlan_tag_present(skb)) {
		/* VLAN tag from trunking driver */
		vlan_tag_insert = 1;
		vlan_tag = skb_vlan_tag_get(skb);
	} else if (enic->loop_enable) {
		vlan_tag = enic->loop_tag;
		loopback = 1;
	}

	if (mss)
		err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
					    vlan_tag_insert, vlan_tag,
					    loopback);
	else if	(skb->ip_summed == CHECKSUM_PARTIAL)
		err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
						vlan_tag, loopback);
	else
		err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
					     vlan_tag, loopback);
	if (unlikely(err)) {
		struct vnic_wq_buf *buf;

		buf = wq->to_use->prev;
		/* while not EOP of previous pkt && queue not empty.
                 * For all non EOP bufs, os_buf is NULL.
                 */
		while (!buf->os_buf && (buf->next != wq->to_clean)) {
			enic_free_wq_buf(wq, buf);
			wq->ring.desc_avail++;
			buf = buf->prev;
		}
		wq->to_use = buf->next;
		dev_kfree_skb(skb);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 118 50.43% 1 25.00%
govindarajulu varadarajan govindarajulu varadarajan 84 35.90% 1 25.00%
vasanthy kolluri vasanthy kolluri 30 12.82% 1 25.00%
jiri pirko jiri pirko 2 0.85% 1 25.00%
Total 234 100.00% 4 100.00%

/* netif_tx_lock held, process context with BHs disabled, or BH */


static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
	struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_wq *wq;
	unsigned int txq_map;
	struct netdev_queue *txq;

	if (skb->len <= 0) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
	wq = &enic->wq[txq_map];
	txq = netdev_get_tx_queue(netdev, txq_map);

	/* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
         * which is very likely.  In the off chance it's going to take
         * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
         */

	if (skb_shinfo(skb)->gso_size == 0 &&
	    skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
	    skb_linearize(skb)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	spin_lock(&enic->wq_lock[txq_map]);

	if (vnic_wq_desc_avail(wq) <
	    skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
		netif_tx_stop_queue(txq);
		/* This is a hard error, log it */
		netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
		spin_unlock(&enic->wq_lock[txq_map]);
		return NETDEV_TX_BUSY;
	}

	enic_queue_wq_skb(enic, wq, skb);

	if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
		netif_tx_stop_queue(txq);
	if (!skb->xmit_more || netif_xmit_stopped(txq))
		vnic_wq_doorbell(wq);

	spin_unlock(&enic->wq_lock[txq_map]);

	return NETDEV_TX_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 165 69.33% 2 25.00%
govindarajulu varadarajan govindarajulu varadarajan 34 14.29% 2 25.00%
govindarajulu.v govindarajulu.v 32 13.45% 1 12.50%
vasanthy kolluri vasanthy kolluri 4 1.68% 1 12.50%
eric w. biederman eric w. biederman 2 0.84% 1 12.50%
stephen hemminger stephen hemminger 1 0.42% 1 12.50%
Total 238 100.00% 8 100.00%

/* dev_base_lock rwlock held, nominally process context */


static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
						struct rtnl_link_stats64 *net_stats)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_stats *stats;
	int err;

	err = enic_dev_stats_dump(enic, &stats);
	/* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
         * For other failures, like devcmd failure, we return previously
         * recorded stats.
         */
	if (err == -ENOMEM)
		return net_stats;

	net_stats->tx_packets = stats->tx.tx_frames_ok;
	net_stats->tx_bytes = stats->tx.tx_bytes_ok;
	net_stats->tx_errors = stats->tx.tx_errors;
	net_stats->tx_dropped = stats->tx.tx_drops;

	net_stats->rx_packets = stats->rx.rx_frames_ok;
	net_stats->rx_bytes = stats->rx.rx_bytes_ok;
	net_stats->rx_errors = stats->rx.rx_errors;
	net_stats->multicast = stats->rx.rx_multicast_frames_ok;
	net_stats->rx_over_errors = enic->rq_truncated_pkts;
	net_stats->rx_crc_errors = enic->rq_bad_fcs;
	net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;

	return net_stats;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 149 86.63% 4 57.14%
govindarajulu varadarajan govindarajulu varadarajan 16 9.30% 1 14.29%
stephen hemminger stephen hemminger 6 3.49% 1 14.29%
vasanthy kolluri vasanthy kolluri 1 0.58% 1 14.29%
Total 172 100.00% 7 100.00%



static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
{
	struct enic *enic = netdev_priv(netdev);

	if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
		unsigned int mc_count = netdev_mc_count(netdev);

		netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
			    ENIC_MULTICAST_PERFECT_FILTERS, mc_count);

		return -ENOSPC;
	}

	enic_dev_add_addr(enic, mc_addr);
	enic->mc_count++;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexander duyck alexander duyck 75 100.00% 1 100.00%
Total 75 100.00% 1 100.00%



static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
{
	struct enic *enic = netdev_priv(netdev);

	enic_dev_del_addr(enic, mc_addr);
	enic->mc_count--;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexander duyck alexander duyck 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
{
	struct enic *enic = netdev_priv(netdev);

	if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
		unsigned int uc_count = netdev_uc_count(netdev);

		netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
			    ENIC_UNICAST_PERFECT_FILTERS, uc_count);

		return -ENOSPC;
	}

	enic_dev_add_addr(enic, uc_addr);
	enic->uc_count++;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexander duyck alexander duyck 75 100.00% 1 100.00%
Total 75 100.00% 1 100.00%



static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
{
	struct enic *enic = netdev_priv(netdev);

	enic_dev_del_addr(enic, uc_addr);
	enic->uc_count--;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexander duyck alexander duyck 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



void enic_reset_addr_lists(struct enic *enic)
{
	struct net_device *netdev = enic->netdev;

	__dev_uc_unsync(netdev, NULL);
	__dev_mc_unsync(netdev, NULL);

	enic->mc_count = 0;
	enic->uc_count = 0;
	enic->flags = 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexander duyck alexander duyck 23 45.10% 1 25.00%
scott feldman scott feldman 15 29.41% 1 25.00%
vasanthy kolluri vasanthy kolluri 13 25.49% 2 50.00%
Total 51 100.00% 4 100.00%



static int enic_set_mac_addr(struct net_device *netdev, char *addr)
{
	struct enic *enic = netdev_priv(netdev);

	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
		if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
			return -EADDRNOTAVAIL;
	} else {
		if (!is_valid_ether_addr(addr))
			return -EADDRNOTAVAIL;
	}

	memcpy(netdev->dev_addr, addr, netdev->addr_len);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 83 94.32% 2 66.67%
roopa prabhu roopa prabhu 5 5.68% 1 33.33%
Total 88 100.00% 3 100.00%



static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
{
	struct enic *enic = netdev_priv(netdev);
	struct sockaddr *saddr = p;
	char *addr = saddr->sa_data;
	int err;

	if (netif_running(enic->netdev)) {
		err = enic_dev_del_station_addr(enic);
		if (err)
			return err;
	}

	err = enic_set_mac_addr(netdev, addr);
	if (err)
		return err;

	if (netif_running(enic->netdev)) {
		err = enic_dev_add_station_addr(enic);
		if (err)
			return err;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 112 100.00% 1 100.00%
Total 112 100.00% 1 100.00%



static int enic_set_mac_address(struct net_device *netdev, void *p)
{
	struct sockaddr *saddr = p;
	char *addr = saddr->sa_data;
	struct enic *enic = netdev_priv(netdev);
	int err;

	err = enic_dev_del_station_addr(enic);
	if (err)
		return err;

	err = enic_set_mac_addr(netdev, addr);
	if (err)
		return err;

	return enic_dev_add_station_addr(enic);
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 67 84.81% 2 66.67%
roopa prabhu roopa prabhu 12 15.19% 1 33.33%
Total 79 100.00% 3 100.00%

/* netif_tx_lock held, BHs disabled */


static void enic_set_rx_mode(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	int directed = 1;
	int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
	int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
	int promisc = (netdev->flags & IFF_PROMISC) ||
		netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
	int allmulti = (netdev->flags & IFF_ALLMULTI) ||
		netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
	unsigned int flags = netdev->flags |
		(allmulti ? IFF_ALLMULTI : 0) |
		(promisc ? IFF_PROMISC : 0);

	if (enic->flags != flags) {
		enic->flags = flags;
		enic_dev_packet_filter(enic, directed,
			multicast, broadcast, promisc, allmulti);
	}

	if (!promisc) {
		__dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
		if (!allmulti)
			__dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 160 90.40% 1 20.00%
alexander duyck alexander duyck 13 7.34% 1 20.00%
scott feldman scott feldman 2 1.13% 1 20.00%
vasanthy kolluri vasanthy kolluri 2 1.13% 2 40.00%
Total 177 100.00% 5 100.00%

/* netif_tx_lock held, BHs disabled */


static void enic_tx_timeout(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	schedule_work(&enic->tx_hang_reset);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 28 96.55% 1 50.00%
govindarajulu varadarajan govindarajulu varadarajan 1 3.45% 1 50.00%
Total 29 100.00% 2 100.00%



static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
{
	struct enic *enic = netdev_priv(netdev);
	struct enic_port_profile *pp;
	int err;

	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
	if (err)
		return err;

	if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
		if (vf == PORT_SELF_VF) {
			memcpy(pp->vf_mac, mac, ETH_ALEN);
			return 0;
		} else {
			/*
                         * For sriov vf's set the mac in hw
                         */
			ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
				vnic_dev_set_mac_addr, mac);
			return enic_dev_status_to_errno(err);
		}
	} else
		return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 119 100.00% 4 100.00%
Total 119 100.00% 4 100.00%



static int enic_set_vf_port(struct net_device *netdev, int vf,
	struct nlattr *port[])
{
	struct enic *enic = netdev_priv(netdev);
	struct enic_port_profile prev_pp;
	struct enic_port_profile *pp;
	int err = 0, restore_pp = 1;

	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
	if (err)
		return err;

	if (!port[IFLA_PORT_REQUEST])
		return -EOPNOTSUPP;

	memcpy(&prev_pp, pp, sizeof(*enic->pp));
	memset(pp, 0, sizeof(*enic->pp));

	pp->set |= ENIC_SET_REQUEST;
	pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);

	if (port[IFLA_PORT_PROFILE]) {
		pp->set |= ENIC_SET_NAME;
		memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
			PORT_PROFILE_MAX);
	}

	if (port[IFLA_PORT_INSTANCE_UUID]) {
		pp->set |= ENIC_SET_INSTANCE;
		memcpy(pp->instance_uuid,
			nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
	}

	if (port[IFLA_PORT_HOST_UUID]) {
		pp->set |= ENIC_SET_HOST;
		memcpy(pp->host_uuid,
			nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
	}

	if (vf == PORT_SELF_VF) {
		/* Special case handling: mac came from IFLA_VF_MAC */
		if (!is_zero_ether_addr(prev_pp.vf_mac))
			memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);

		if (is_zero_ether_addr(netdev->dev_addr))
			eth_hw_addr_random(netdev);
	} else {
		/* SR-IOV VF: get mac from adapter */
		ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
			vnic_dev_get_mac_addr, pp->mac_addr);
		if (err) {
			netdev_err(netdev, "Error getting mac for vf %d\n", vf);
			memcpy(pp, &prev_pp, sizeof(*pp));
			return enic_dev_status_to_errno(err);
		}
	}

	err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
	if (err) {
		if (restore_pp) {
			/* Things are still the way they were: Implicit
                         * DISASSOCIATE failed
                         */
			memcpy(pp, &prev_pp, sizeof(*pp));
		} else {
			memset(pp, 0, sizeof(*pp));
			if (vf == PORT_SELF_VF)
				eth_zero_addr(netdev->dev_addr);
		}
	} else {
		/* Set flag to indicate that the port assoc/disassoc
                 * request has been sent out to fw
                 */
		pp->set |= ENIC_PORT_REQUEST_APPLIED;

		/* If DISASSOCIATE, clean up all assigned/saved macaddresses */
		if (pp->request == PORT_REQUEST_DISASSOCIATE) {
			eth_zero_addr(pp->mac_addr);
			if (vf == PORT_SELF_VF)
				eth_zero_addr(netdev->dev_addr);
		}
	}

	if (vf == PORT_SELF_VF)
		eth_zero_addr(pp->vf_mac);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 348 76.99% 5 41.67%
scott feldman scott feldman 91 20.13% 3 25.00%
joe perches joe perches 8 1.77% 2 16.67%
jiri pirko jiri pirko 4 0.88% 1 8.33%
danny kukawka danny kukawka 1 0.22% 1 8.33%
Total 452 100.00% 12 100.00%



static int enic_get_vf_port(struct net_device *netdev, int vf,
	struct sk_buff *skb)
{
	struct enic *enic = netdev_priv(netdev);
	u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
	struct enic_port_profile *pp;
	int err;

	ENIC_PP_BY_INDEX(enic, vf, pp, &err);
	if (err)
		return err;

	if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
		return -ENODATA;

	err = enic_process_get_pp_request(enic, vf, pp->request, &response);
	if (err)
		return err;

	if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
	    nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
	    ((pp->set & ENIC_SET_NAME) &&
	     nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
	    ((pp->set & ENIC_SET_INSTANCE) &&
	     nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
		     pp->instance_uuid)) ||
	    ((pp->set & ENIC_SET_HOST) &&
	     nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 127 62.87% 3 42.86%
roopa prabhu roopa prabhu 45 22.28% 3 42.86%
david s. miller david s. miller 30 14.85% 1 14.29%
Total 202 100.00% 7 100.00%



static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);

	if (!buf->os_buf)
		return;

	pci_unmap_single(enic->pdev, buf->dma_addr,
		buf->len, PCI_DMA_FROMDEVICE);
	dev_kfree_skb_any(buf->os_buf);
	buf->os_buf = NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 60 90.91% 1 50.00%
govindarajulu varadarajan govindarajulu varadarajan 6 9.09% 1 50.00%
Total 66 100.00% 2 100.00%



static int enic_rq_alloc_buf(struct vnic_rq *rq)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);
	struct net_device *netdev = enic->netdev;
	struct sk_buff *skb;
	unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
	unsigned int os_buf_index = 0;
	dma_addr_t dma_addr;
	struct vnic_rq_buf *buf = rq->to_use;

	if (buf->os_buf) {
		enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
				   buf->len);

		return 0;
	}
	skb = netdev_alloc_skb_ip_align(netdev, len);
	if (!skb)
		return -ENOMEM;

	dma_addr = pci_map_single(enic->pdev, skb->data, len,
				  PCI_DMA_FROMDEVICE);
	if (unlikely(enic_dma_map_check(enic, dma_addr))) {
		dev_kfree_skb(skb);
		return -ENOMEM;
	}

	enic_queue_rq_desc(rq, skb, os_buf_index,
		dma_addr, len);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 105 62.13% 2 28.57%
govindarajulu varadarajan govindarajulu varadarajan 62 36.69% 3 42.86%
eric dumazet eric dumazet 1 0.59% 1 14.29%
vasanthy kolluri vasanthy kolluri 1 0.59% 1 14.29%
Total 169 100.00% 7 100.00%



static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
				      u32 pkt_len)
{
	if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
		pkt_size->large_pkt_bytes_cnt += pkt_len;
	else
		pkt_size->small_pkt_bytes_cnt += pkt_len;
}

Contributors
Person Tokens Prop Commits CommitProp
sujith sankar sujith sankar 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
			     struct vnic_rq_buf *buf, u16 len)
{
	struct enic *enic = netdev_priv(netdev);
	struct sk_buff *new_skb;

	if (len > enic->rx_copybreak)
		return false;
	new_skb = netdev_alloc_skb_ip_align(netdev, len);
	if (!new_skb)
		return false;
	pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
				    DMA_FROM_DEVICE);
	memcpy(new_skb->data, (*skb)->data, len);
	*skb = new_skb;

	return true;
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 107 100.00% 1 100.00%
Total 107 100.00% 1 100.00%



static void enic_rq_indicate_buf(struct vnic_rq *rq,
	struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
	int skipped, void *opaque)
{
	struct enic *enic = vnic_dev_priv(rq->vdev);
	struct net_device *netdev = enic->netdev;
	struct sk_buff *skb;
	struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];

	u8 type, color, eop, sop, ingress_port, vlan_stripped;
	u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
	u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
	u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
	u8 packet_error;
	u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
	u32 rss_hash;

	if (skipped)
		return;

	skb = buf->os_buf;

	cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
		&type, &color, &q_number, &completed_index,
		&ingress_port, &fcoe, &eop, &sop, &rss_type,
		&csum_not_calc, &rss_hash, &bytes_written,
		&packet_error, &vlan_stripped, &vlan_tci, &checksum,
		&fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
		&fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
		&ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
		&fcs_ok);

	if (packet_error) {

		if (!fcs_ok) {
			if (bytes_written > 0)
				enic->rq_bad_fcs++;
			else if (bytes_written == 0)
				enic->rq_truncated_pkts++;
		}

		pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
				 PCI_DMA_FROMDEVICE);
		dev_kfree_skb_any(skb);
		buf->os_buf = NULL;

		return;
	}

	if (eop && bytes_written > 0) {

		/* Good receive
                 */

		if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
			buf->os_buf = NULL;
			pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
					 PCI_DMA_FROMDEVICE);
		}
		prefetch(skb->data - NET_IP_ALIGN);

		skb_put(skb, bytes_written);
		skb->protocol = eth_type_trans(skb, netdev);
		skb_record_rx_queue(skb, q_number);
		if (netdev->features & NETIF_F_RXHASH) {
			skb_set_hash(skb, rss_hash,
				     (rss_type &
				      (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
				       NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
				       NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
				     PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
		}

		/* Hardware does not provide whole packet checksum. It only
                 * provides pseudo checksum. Since hw validates the packet
                 * checksum but not provide us the checksum value. use
                 * CHECSUM_UNNECESSARY.
                 */
		if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok &&
		    ipv4_csum_ok)
			skb->ip_summed = CHECKSUM_UNNECESSARY;

		if (vlan_stripped)
			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);

		skb_mark_napi_id(skb, &enic->napi[rq->index]);
		if (enic_poll_busy_polling(rq) ||
		    !(netdev->features & NETIF_F_GRO))
			netif_receive_skb(skb);
		else
			napi_gro_receive(&enic->napi[q_number], skb);
		if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
			enic_intr_update_pkt_size(&cq->pkt_size_counter,
						  bytes_written);
	} else {

		/* Buffer overflow
                 */

		pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
				 PCI_DMA_FROMDEVICE);
		dev_kfree_skb_any(skb);
		buf->os_buf = NULL;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 334 59.43% 4 23.53%
govindarajulu varadarajan govindarajulu varadarajan 129 22.95% 4 23.53%
sujith sankar sujith sankar 38 6.76% 1 5.88%
govindarajulu.v govindarajulu.v 29 5.16% 1 5.88%
tom herbert tom herbert 11 1.96% 1 5.88%
vasanthy kolluri vasanthy kolluri 9 1.60% 3 17.65%
michal miroslaw michal miroslaw 6 1.07% 1 5.88%
patrick mchardy patrick mchardy 5 0.89% 1 5.88%
jiri pirko jiri pirko 1 0.18% 1 5.88%
Total 562 100.00% 17 100.00%



static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
	u8 type, u16 q_number, u16 completed_index, void *opaque)
{
	struct enic *enic = vnic_dev_priv(vdev);

	vnic_rq_service(&enic->rq[q_number], cq_desc,
		completed_index, VNIC_RQ_RETURN_DESC,
		enic_rq_indicate_buf, opaque);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%



static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
{
	unsigned int intr = enic_msix_rq_intr(enic, rq->index);
	struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
	u32 timer = cq->tobe_rx_coal_timeval;

	if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
		vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
		cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 89 100.00% 1 100.00%
Total 89 100.00% 1 100.00%



static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
{
	struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
	struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
	struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
	int index;
	u32 timer;
	u32 range_start;
	u32 traffic;
	u64 delta;
	ktime_t now = ktime_get();

	delta = ktime_us_delta(now, cq->prev_ts);
	if (delta < ENIC_AIC_TS_BREAK)
		return;
	cq->prev_ts = now;

	traffic = pkt_size_counter->large_pkt_bytes_cnt +
		  pkt_size_counter->small_pkt_bytes_cnt;
	/* The table takes Mbps
         * traffic *= 8    => bits
         * traffic *= (10^6 / delta)    => bps
         * traffic /= 10^6     => Mbps
         *
         * Combining, traffic *= (8 / delta)
         */

	traffic <<= 3;
	traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;

	for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
		if (traffic < mod_table[index].rx_rate)
			break;
	range_start = (pkt_size_counter->small_pkt_bytes_cnt >
		       pkt_size_counter->large_pkt_bytes_cnt << 1) ?
		      rx_coal->small_pkt_range_start :
		      rx_coal->large_pkt_range_start;
	timer = range_start + ((rx_coal->range_end - range_start) *
			       mod_table[index].range_percent / 100);
	/* Damping */
	cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;

	pkt_size_counter->large_pkt_bytes_cnt = 0;
	pkt_size_counter->small_pkt_bytes_cnt = 0;
}

Contributors
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govindarajulu varadarajan govindarajulu varadarajan 228 100.00% 1 100.00%
Total 228 100.00% 1 100.00%



static int enic_poll(struct napi_struct *napi, int budget)
{
	struct net_device *netdev = napi->dev;
	struct enic *enic = netdev_priv(netdev);
	unsigned int cq_rq = enic_cq_rq(enic, 0);
	unsigned int cq_wq = enic_cq_wq(enic, 0);
	unsigned int intr = enic_legacy_io_intr();
	unsigned int rq_work_to_do = budget;
	unsigned int wq_work_to_do = -1; /* no limit */
	unsigned int  work_done, rq_work_done = 0, wq_work_done;
	int err;

	wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
				       enic_wq_service, NULL);

	if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
		if (wq_work_done > 0)
			vnic_intr_return_credits(&enic->intr[intr],
						 wq_work_done,
						 0 /* dont unmask intr */,
						 0 /* dont reset intr timer */);
		return budget;
	}

	if (budget > 0)
		rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
			rq_work_to_do, enic_rq_service, NULL);

	/* Accumulate intr event credits for this polling
         * cycle.  An intr event is the completion of a
         * a WQ or RQ packet.
         */

	work_done = rq_work_done + wq_work_done;

	if (work_done > 0)
		vnic_intr_return_credits(&enic->intr[intr],
			work_done,
			0 /* don't unmask intr */,
			0 /* don't reset intr timer */);

	err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
	enic_poll_unlock_napi(&enic->rq[cq_rq], napi);

	/* Buffer allocation failed. Stay in polling
         * mode so we can try to fill the ring again.
         */

	if (err)
		rq_work_done = rq_work_to_do;
	if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
		/* Call the function which refreshes the intr coalescing timer
                 * value based on the traffic.
                 */
		enic_calc_int_moderation(enic, &enic->rq[0]);

	if (rq_work_done < rq_work_to_do) {

		/* Some work done, but not enough to stay in polling,
                 * exit polling
                 */

		napi_complete(napi);
		if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
			enic_set_int_moderation(enic, &enic->rq[0]);
		vnic_intr_unmask(&enic->intr[intr]);
	}

	return rq_work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 132 41.64% 4 44.44%
scott feldman scott feldman 118 37.22% 2 22.22%
vasanthy kolluri vasanthy kolluri 38 11.99% 1 11.11%
sujith sankar sujith sankar 27 8.52% 1 11.11%
eric w. biederman eric w. biederman 2 0.63% 1 11.11%
Total 317 100.00% 9 100.00%

#ifdef CONFIG_RFS_ACCEL


static void enic_free_rx_cpu_rmap(struct enic *enic)
{
	free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
	enic->netdev->rx_cpu_rmap = NULL;
}

Contributors
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govindarajulu varadarajan govindarajulu varadarajan 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static void enic_set_rx_cpu_rmap(struct enic *enic)
{
	int i, res;

	if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
		enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
		if (unlikely(!enic->netdev->rx_cpu_rmap))
			return;
		for (i = 0; i < enic->rq_count; i++) {
			res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
					       enic->msix_entry[i].vector);
			if (unlikely(res)) {
				enic_free_rx_cpu_rmap(enic);
				return;
			}
		}
	}
}

Contributors
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govindarajulu varadarajan govindarajulu varadarajan 107 100.00% 1 100.00%
Total 107 100.00% 1 100.00%

#else



static void enic_free_rx_cpu_rmap(struct enic *enic)
{
}

Contributors
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govindarajulu varadarajan govindarajulu varadarajan 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%



static void enic_set_rx_cpu_rmap(struct enic *enic)
{
}

Contributors
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govindarajulu varadarajan govindarajulu varadarajan 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%

#endif /* CONFIG_RFS_ACCEL */

#ifdef CONFIG_NET_RX_BUSY_POLL


static int enic_busy_poll(struct napi_struct *napi)
{
	struct net_device *netdev = napi->dev;
	struct enic *enic = netdev_priv(netdev);
	unsigned int rq = (napi - &enic->napi[0]);
	unsigned int cq = enic_cq_rq(enic, rq);
	unsigned int intr = enic_msix_rq_intr(enic, rq);
	unsigned int work_to_do = -1; /* clean all pkts possible */
	unsigned int work_done;

	if (!enic_poll_lock_poll(&enic->rq[rq]))
		return LL_FLUSH_BUSY;
	work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
				    enic_rq_service, NULL);

	if (work_done > 0)
		vnic_intr_return_credits(&enic->intr[intr],
					 work_done, 0, 0);
	vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
	if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
		enic_calc_int_moderation(enic, &enic->rq[rq]);
	enic_poll_unlock_poll(&enic->rq[rq]);

	return work_done;
}
Contributors
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govindarajulu varadarajan govindarajulu varadarajan 186 99.47% 1 50.00%
prabhakar lad prabhakar lad 1 0.53% 1 50.00%
Total 187 100.00% 2 100.00%

#endif /* CONFIG_NET_RX_BUSY_POLL */



static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
{
	struct net_device *netdev = napi->dev;
	struct enic *enic = netdev_priv(netdev);
	unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
	struct vnic_wq *wq = &enic->wq[wq_index];
	unsigned int cq;
	unsigned int intr;
	unsigned int wq_work_to_do = -1; /* clean all desc possible */
	unsigned int wq_work_done;
	unsigned int wq_irq;

	wq_irq = wq->index;
	cq = enic_cq_wq(enic, wq_irq);
	intr = enic_msix_wq_intr(enic, wq_irq);
	wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
				       enic_wq_service, NULL);

	vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
				 0 /* don't unmask intr */,
				 1 /* reset intr timer */);
	if (!wq_work_done) {
		napi_complete(napi);
		vnic_intr_unmask(&enic->intr[intr]);
		return 0;
	}

	return budget;
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 179 98.90% 2 66.67%
sujith sankar sujith sankar 2 1.10% 1 33.33%
Total 181 100.00% 3 100.00%



static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
{
	struct net_device *netdev = napi->dev;
	struct enic *enic = netdev_priv(netdev);
	unsigned int rq = (napi - &enic->napi[0]);
	unsigned int cq = enic_cq_rq(enic, rq);
	unsigned int intr = enic_msix_rq_intr(enic, rq);
	unsigned int work_to_do = budget;
	unsigned int work_done = 0;
	int err;

	if (!enic_poll_lock_napi(&enic->rq[rq]))
		return budget;
	/* Service RQ
         */

	if (budget > 0)
		work_done = vnic_cq_service(&enic->cq[cq],
			work_to_do, enic_rq_service, NULL);

	/* Return intr event credits for this polling
         * cycle.  An intr event is the completion of a
         * RQ packet.
         */

	if (work_done > 0)
		vnic_intr_return_credits(&enic->intr[intr],
			work_done,
			0 /* don't unmask intr */,
			0 /* don't reset intr timer */);

	err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);

	/* Buffer allocation failed. Stay in polling mode
         * so we can try to fill the ring again.
         */

	if (err)
		work_done = work_to_do;
	if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
		/* Call the function which refreshes the intr coalescing timer
                 * value based on the traffic.
                 */
		enic_calc_int_moderation(enic, &enic->rq[rq]);

	enic_poll_unlock_napi(&enic->rq[rq], napi);
	if (work_done < work_to_do) {

		/* Some work done, but not enough to stay in polling,
                 * exit polling
                 */

		napi_complete(napi);
		if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
			enic_set_int_moderation(enic, &enic->rq[rq]);
		vnic_intr_unmask(&enic->intr[intr]);
	}

	return work_done;
}

Contributors
Person Tokens Prop Commits CommitProp
sujith sankar sujith sankar 145 55.13% 1 7.69%
scott feldman scott feldman 78 29.66% 2 15.38%
govindarajulu varadarajan govindarajulu varadarajan 34 12.93% 6 46.15%
vasanthy kolluri vasanthy kolluri 5 1.90% 3 23.08%
ben hutchings ben hutchings 1 0.38% 1 7.69%
Total 263 100.00% 13 100.00%



static void enic_notify_timer(unsigned long data)
{
	struct enic *enic = (struct enic *)data;

	enic_notify_check(enic);

	mod_timer(&enic->notify_timer,
		round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
}

Contributors
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scott feldman scott feldman 42 100.00% 2 100.00%
Total 42 100.00% 2 100.00%



static void enic_free_intr(struct enic *enic)
{
	struct net_device *netdev = enic->netdev;
	unsigned int i;

	enic_free_rx_cpu_rmap(enic);
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		free_irq(enic->pdev->irq, netdev);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		free_irq(enic->pdev->irq, enic);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
			if (enic->msix[i].requested)
				free_irq(enic->msix_entry[i].vector,
					enic->msix[i].devid);
		break;
	default:
		break;
	}
}

Contributors
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scott feldman scott feldman 121 96.03% 2 66.67%
govindarajulu varadarajan govindarajulu varadarajan 5 3.97% 1 33.33%
Total 126 100.00% 3 100.00%



static int enic_request_intr(struct enic *enic)
{
	struct net_device *netdev = enic->netdev;
	unsigned int i, intr;
	int err = 0;

	enic_set_rx_cpu_rmap(enic);
	switch (vnic_dev_get_intr_mode(enic->vdev)) {

	case VNIC_DEV_INTR_MODE_INTX:

		err = request_irq(enic->pdev->irq, enic_isr_legacy,
			IRQF_SHARED, netdev->name, netdev);
		break;

	case VNIC_DEV_INTR_MODE_MSI:

		err = request_irq(enic->pdev->irq, enic_isr_msi,
			0, netdev->name, enic);
		break;

	case VNIC_DEV_INTR_MODE_MSIX:

		for (i = 0; i < enic->rq_count; i++) {
			intr = enic_msix_rq_intr(enic, i);
			snprintf(enic->msix[intr].devname,
				sizeof(enic->msix[intr].devname),
				"%.11s-rx-%d", netdev->name, i);
			enic->msix[intr].isr = enic_isr_msix;
			enic->msix[intr].devid = &enic->napi[i];
		}

		for (i = 0; i < enic->wq_count; i++) {
			int wq = enic_cq_wq(enic, i);

			intr = enic_msix_wq_intr(enic, i);
			snprintf(enic->msix[intr].devname,
				sizeof(enic->msix[intr].devname),
				"%.11s-tx-%d", netdev->name, i);
			enic->msix[intr].isr = enic_isr_msix;
			enic->msix[intr].devid = &enic->napi[wq];
		}

		intr = enic_msix_err_intr(enic);
		snprintf(enic->msix[intr].devname,
			sizeof(enic->msix[intr].devname),
			"%.11s-err", netdev->name);
		enic->msix[intr].isr = enic_isr_msix_err;
		enic->msix[intr].devid = enic;

		intr = enic_msix_notify_intr(enic);
		snprintf(enic->msix[intr].devname,
			sizeof(enic->msix[intr].devname),
			"%.11s-notify", netdev->name);
		enic->msix[intr].isr = enic_isr_msix_notify;
		enic->msix[intr].devid = enic;

		for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
			enic->msix[i].requested = 0;

		for (i = 0; i < enic->intr_count; i++) {
			err = request_irq(enic->msix_entry[i].vector,
				enic->msix[i].isr, 0,
				enic->msix[i].devname,
				enic->msix[i].devid);
			if (err) {
				enic_free_intr(enic);
				break;
			}
			enic->msix[i].requested = 1;
		}

		break;

	default:
		break;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 324 62.55% 1 20.00%
vasanthy kolluri vasanthy kolluri 119 22.97% 1 20.00%
dan carpenter dan carpenter 52 10.04% 1 20.00%
govindarajulu varadarajan govindarajulu varadarajan 23 4.44% 2 40.00%
Total 518 100.00% 5 100.00%



static void enic_synchronize_irqs(struct enic *enic)
{
	unsigned int i;

	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
	case VNIC_DEV_INTR_MODE_MSI:
		synchronize_irq(enic->pdev->irq);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < enic->intr_count; i++)
			synchronize_irq(enic->msix_entry[i].vector);
		break;
	default:
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 75 100.00% 1 100.00%
Total 75 100.00% 1 100.00%



static void enic_set_rx_coal_setting(struct enic *enic)
{
	unsigned int speed;
	int index = -1;
	struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;

	/* 1. Read the link speed from fw
         * 2. Pick the default range for the speed
         * 3. Update it in enic->rx_coalesce_setting
         */
	speed = vnic_dev_port_speed(enic->vdev);
	if (ENIC_LINK_SPEED_10G < speed)
		index = ENIC_LINK_40G_INDEX;
	else if (ENIC_LINK_SPEED_4G < speed)
		index = ENIC_LINK_10G_INDEX;
	else
		index = ENIC_LINK_4G_INDEX;

	rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
	rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
	rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;

	/* Start with the value provided by UCSM */
	for (index = 0; index < enic->rq_count; index++)
		enic->cq[index].cur_rx_coal_timeval =
				enic->config.intr_timer_usec;

	rx_coal->use_adaptive_rx_coalesce = 1;
}

Contributors
Person Tokens Prop Commits CommitProp
sujith sankar sujith sankar 132 100.00% 1 100.00%
Total 132 100.00% 1 100.00%



static int enic_dev_notify_set(struct enic *enic)
{
	int err;

	spin_lock_bh(&enic->devcmd_lock);
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
		err = vnic_dev_notify_set(enic->vdev,
			enic_legacy_notify_intr());
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		err = vnic_dev_notify_set(enic->vdev,
			enic_msix_notify_intr(enic));
		break;
	default:
		err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
		break;
	}
	spin_unlock_bh(&enic->devcmd_lock);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 47 50.54% 2 40.00%
vasanthy kolluri vasanthy kolluri 44 47.31% 2 40.00%
tony camuso tony camuso 2 2.15% 1 20.00%
Total 93 100.00% 5 100.00%



static void enic_notify_timer_start(struct enic *enic)
{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSI:
		mod_timer(&enic->notify_timer, jiffies);
		break;
	default:
		/* Using intr for notification for INTx/MSI-X */
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 39 100.00% 1 100.00%
Total 39 100.00% 1 100.00%

/* rtnl lock is held, process context */


static int enic_open(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	unsigned int i;
	int err;

	err = enic_request_intr(enic);
	if (err) {
		netdev_err(netdev, "Unable to request irq.\n");
		return err;
	}
	enic_init_affinity_hint(enic);
	enic_set_affinity_hint(enic);

	err = enic_dev_notify_set(enic);
	if (err) {
		netdev_err(netdev,
			"Failed to alloc notify buffer, aborting.\n");
		goto err_out_free_intr;
	}

	for (i = 0; i < enic->rq_count; i++) {
		vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
		/* Need at least one buffer on ring to get going */
		if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
			netdev_err(netdev, "Unable to alloc receive buffers\n");
			err = -ENOMEM;
			goto err_out_free_rq;
		}
	}

	for (i = 0; i < enic->wq_count; i++)
		vnic_wq_enable(&enic->wq[i]);
	for (i = 0; i < enic->rq_count; i++)
		vnic_rq_enable(&enic->rq[i]);

	if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
		enic_dev_add_station_addr(enic);

	enic_set_rx_mode(netdev);

	netif_tx_wake_all_queues(netdev);

	for (i = 0; i < enic->rq_count; i++) {
		enic_busy_poll_init_lock(&enic->rq[i]);
		napi_enable(&enic->napi[i]);
	}
	if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
		for (i = 0; i < enic->wq_count; i++)
			napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
	enic_dev_enable(enic);

	for (i = 0; i < enic->intr_count; i++)
		vnic_intr_unmask(&enic->intr[i]);

	enic_notify_timer_start(enic);
	enic_rfs_flw_tbl_init(enic);

	return 0;

err_out_free_rq:
	for (i = 0; i < enic->rq_count; i++)
		vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
	enic_dev_notify_unset(enic);
err_out_free_intr:
	enic_unset_affinity_hint(enic);
	enic_free_intr(enic);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 248 61.54% 5 26.32%
govindarajulu varadarajan govindarajulu varadarajan 105 26.05% 5 26.32%
vasanthy kolluri vasanthy kolluri 34 8.44% 4 21.05%
roopa prabhu roopa prabhu 15 3.72% 4 21.05%
govindarajulu.v govindarajulu.v 1 0.25% 1 5.26%
Total 403 100.00% 19 100.00%

/* rtnl lock is held, process context */


static int enic_stop(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	unsigned int i;
	int err;

	for (i = 0; i < enic->intr_count; i++) {
		vnic_intr_mask(&enic->intr[i]);
		(void)vnic_intr_masked(&enic->intr[i]); /* flush write */
	}

	enic_synchronize_irqs(enic);

	del_timer_sync(&enic->notify_timer);
	enic_rfs_flw_tbl_free(enic);

	enic_dev_disable(enic);

	for (i = 0; i < enic->rq_count; i++) {
		napi_disable(&enic->napi[i]);
		local_bh_disable();
		while (!enic_poll_lock_napi(&enic->rq[i]))
			mdelay(1);
		local_bh_enable();
	}

	netif_carrier_off(netdev);
	netif_tx_disable(netdev);
	if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
		for (i = 0; i < enic->wq_count; i++)
			napi_disable(&enic->napi[enic_cq_wq(enic, i)]);

	if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
		enic_dev_del_station_addr(enic);

	for (i = 0; i < enic->wq_count; i++) {
		err = vnic_wq_disable(&enic->wq[i]);
		if (err)
			return err;
	}
	for (i = 0; i < enic->rq_count; i++) {
		err = vnic_rq_disable(&enic->rq[i]);
		if (err)
			return err;
	}

	enic_dev_notify_unset(enic);
	enic_unset_affinity_hint(enic);
	enic_free_intr(enic);

	for (i = 0; i < enic->wq_count; i++)
		vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
	for (i = 0; i < enic->rq_count; i++)
		vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
	for (i = 0; i < enic->cq_count; i++)
		vnic_cq_clean(&enic->cq[i]);
	for (i = 0; i < enic->intr_count; i++)
		vnic_intr_clean(&enic->intr[i]);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 288 68.90% 5 31.25%
govindarajulu varadarajan govindarajulu varadarajan 79 18.90% 5 31.25%
vasanthy kolluri vasanthy kolluri 37 8.85% 3 18.75%
roopa prabhu roopa prabhu 14 3.35% 3 18.75%
Total 418 100.00% 16 100.00%



static int enic_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct enic *enic = netdev_priv(netdev);
	int running = netif_running(netdev);

	if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
		return -EINVAL;

	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
		return -EOPNOTSUPP;

	if (running)
		enic_stop(netdev);

	netdev->mtu = new_mtu;

	if (netdev->mtu > enic->port_mtu)
		netdev_warn(netdev,
			"interface MTU (%d) set higher than port MTU (%d)\n",
			netdev->mtu, enic->port_mtu);

	if (running)
		enic_open(netdev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 88 77.19% 2 40.00%
roopa prabhu roopa prabhu 16 14.04% 2 40.00%
vasanthy kolluri vasanthy kolluri 10 8.77% 1 20.00%
Total 114 100.00% 5 100.00%



static void enic_change_mtu_work(struct work_struct *work)
{
	struct enic *enic = container_of(work, struct enic, change_mtu_work);
	struct net_device *netdev = enic->netdev;
	int new_mtu = vnic_dev_mtu(enic->vdev);
	int err;
	unsigned int i;

	new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));

	rtnl_lock();

	/* Stop RQ */
	del_timer_sync(&enic->notify_timer);

	for (i = 0; i < enic->rq_count; i++)
		napi_disable(&enic->napi[i]);

	vnic_intr_mask(&enic->intr[0]);
	enic_synchronize_irqs(enic);
	err = vnic_rq_disable(&enic->rq[0]);
	if (err) {
		rtnl_unlock();
		netdev_err(netdev, "Unable to disable RQ.\n");
		return;
	}
	vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
	vnic_cq_clean(&enic->cq[0]);
	vnic_intr_clean(&enic->intr[0]);

	/* Fill RQ with new_mtu-sized buffers */
	netdev->mtu = new_mtu;
	vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
	/* Need at least one buffer on ring to get going */
	if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
		rtnl_unlock();
		netdev_err(netdev, "Unable to alloc receive buffers.\n");
		return;
	}

	/* Start RQ */
	vnic_rq_enable(&enic->rq[0]);
	napi_enable(&enic->napi[0]);
	vnic_intr_unmask(&enic->intr[0]);
	enic_notify_timer_start(enic);

	rtnl_unlock();

	netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 285 97.94% 1 50.00%
konstantin khlebnikov konstantin khlebnikov 6 2.06% 1 50.00%
Total 291 100.00% 2 100.00%

#ifdef CONFIG_NET_POLL_CONTROLLER


static void enic_poll_controller(struct net_device *netdev)
{
	struct enic *enic = netdev_priv(netdev);
	struct vnic_dev *vdev = enic->vdev;
	unsigned int i, intr;

	switch (vnic_dev_get_intr_mode(vdev)) {
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < enic->rq_count; i++) {
			intr = enic_msix_rq_intr(enic, i);
			enic_isr_msix(enic->msix_entry[intr].vector,
				      &enic->napi[i]);
		}

		for (i = 0; i < enic->wq_count; i++) {
			intr = enic_msix_wq_intr(enic, i);
			enic_isr_msix(enic->msix_entry[intr].vector,
				      &enic->napi[enic_cq_wq(enic, i)]);
		}

		break;
	case VNIC_DEV_INTR_MODE_MSI:
		enic_isr_msi(enic->pdev->irq, enic);
		break;
	case VNIC_DEV_INTR_MODE_INTX:
		enic_isr_legacy(enic->pdev->irq, netdev);
		break;
	default:
		break;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 89 50.00% 1 20.00%
vasanthy kolluri vasanthy kolluri 76 42.70% 3 60.00%
govindarajulu varadarajan govindarajulu varadarajan 13 7.30% 1 20.00%
Total 178 100.00% 5 100.00%

#endif



static int enic_dev_wait(struct vnic_dev *vdev,
	int (*start)(struct vnic_dev *, int),
	int (*finished)(struct vnic_dev *, int *),
	int arg)
{
	unsigned long time;
	int done;
	int err;

	BUG_ON(in_interrupt());

	err = start(vdev, arg);
	if (err)
		return err;

	/* Wait for func to complete...2 seconds max
         */

	time = jiffies + (HZ * 2);
	do {

		err = finished(vdev, &done);
		if (err)
			return err;

		if (done)
			return 0;

		schedule_timeout_uninterruptible(HZ / 10);

	} while (time_after(time, jiffies));

	return -ETIMEDOUT;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 132 100.00% 1 100.00%
Total 132 100.00% 1 100.00%



static int enic_dev_open(struct enic *enic)
{
	int err;

	err = enic_dev_wait(enic->vdev, vnic_dev_open,
		vnic_dev_open_done, 0);
	if (err)
		dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
			err);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 39 81.25% 1 50.00%
vasanthy kolluri vasanthy kolluri 9 18.75% 1 50.00%
Total 48 100.00% 2 100.00%



static int enic_dev_soft_reset(struct enic *enic)
{
	int err;

	err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
			    vnic_dev_soft_reset_done, 0);
	if (err)
		netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n",
			   err);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 47 100.00% 1 100.00%
Total 47 100.00% 1 100.00%



static int enic_dev_hang_reset(struct enic *enic)
{
	int err;

	err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
		vnic_dev_hang_reset_done, 0);
	if (err)
		netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
			err);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 36 76.60% 1 33.33%
vasanthy kolluri vasanthy kolluri 11 23.40% 2 66.67%
Total 47 100.00% 3 100.00%



int __enic_set_rsskey(struct enic *enic)
{
	union vnic_rss_key *rss_key_buf_va;
	dma_addr_t rss_key_buf_pa;
	int i, kidx, bidx, err;

	rss_key_buf_va = pci_zalloc_consistent(enic->pdev,
					       sizeof(union vnic_rss_key),
					       &rss_key_buf_pa);
	if (!rss_key_buf_va)
		return -ENOMEM;

	for (i = 0; i < ENIC_RSS_LEN; i++) {
		kidx = i / ENIC_RSS_BYTES_PER_KEY;
		bidx = i % ENIC_RSS_BYTES_PER_KEY;
		rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
	}
	spin_lock_bh(&enic->devcmd_lock);
	err = enic_set_rss_key(enic,
		rss_key_buf_pa,
		sizeof(union vnic_rss_key));
	spin_unlock_bh(&enic->devcmd_lock);

	pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
		rss_key_buf_va, rss_key_buf_pa);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 79 52.32% 2 33.33%
eric dumazet eric dumazet 54 35.76% 1 16.67%
scott feldman scott feldman 13 8.61% 1 16.67%
govindarajulu varadarajan govindarajulu varadarajan 3 1.99% 1 16.67%
tony camuso tony camuso 2 1.32% 1 16.67%
Total 151 100.00% 6 100.00%



static int enic_set_rsskey(struct enic *enic)
{
	netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);

	return __enic_set_rsskey(enic);
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
{
	dma_addr_t rss_cpu_buf_pa;
	union vnic_rss_cpu *rss_cpu_buf_va = NULL;
	unsigned int i;
	int err;

	rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
		sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
	if (!rss_cpu_buf_va)
		return -ENOMEM;

	for (i = 0; i < (1 << rss_hash_bits); i++)
		(*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;

	spin_lock_bh(&enic->devcmd_lock);
	err = enic_set_rss_cpu(enic,
		rss_cpu_buf_pa,
		sizeof(union vnic_rss_cpu));
	spin_unlock_bh(&enic->devcmd_lock);

	pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
		rss_cpu_buf_va, rss_cpu_buf_pa);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 149 98.68% 2 66.67%
tony camuso tony camuso 2 1.32% 1 33.33%
Total 151 100.00% 3 100.00%



static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
	u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
{
	const u8 tso_ipid_split_en = 0;
	const u8 ig_vlan_strip_en = 1;
	int err;

	/* Enable VLAN tag stripping.
        */

	spin_lock_bh(&enic->devcmd_lock);
	err = enic_set_nic_cfg(enic,
		rss_default_cpu, rss_hash_type,
		rss_hash_bits, rss_base_cpu,
		rss_enable, tso_ipid_split_en,
		ig_vlan_strip_en);
	spin_unlock_bh(&enic->devcmd_lock);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 80 97.56% 1 50.00%
tony camuso tony camuso 2 2.44% 1 50.00%
Total 82 100.00% 2 100.00%



static int enic_set_rss_nic_cfg(struct enic *enic)
{
	struct device *dev = enic_get_dev(enic);
	const u8 rss_default_cpu = 0;
	const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
		NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
		NIC_CFG_RSS_HASH_TYPE_IPV6 |
		NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
	const u8 rss_hash_bits = 7;
	const u8 rss_base_cpu = 0;
	u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);

	if (rss_enable) {
		if (!enic_set_rsskey(enic)) {
			if (enic_set_rsscpu(enic, rss_hash_bits)) {
				rss_enable = 0;
				dev_warn(dev, "RSS disabled, "
					"Failed to set RSS cpu indirection table.");
			}
		} else {
			rss_enable = 0;
			dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
		}
	}

	return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
		rss_hash_bits, rss_base_cpu, rss_enable);
}

Contributors
Person Tokens Prop Commits CommitProp
vasanthy kolluri vasanthy kolluri 134 97.10% 2 66.67%
scott feldman scott feldman 4 2.90% 1 33.33%
Total 138 100.00% 3 100.00%



static void enic_reset(struct work_struct *work)
{
	struct enic *enic = container_of(work, struct enic, reset);

	if (!netif_running(enic->netdev))
		return;

	rtnl_lock();

	spin_lock(&enic->enic_api_lock);
	enic_stop(enic->netdev);
	enic_dev_soft_reset(enic);
	enic_reset_addr_lists(enic);
	enic_init_vnic_resources(enic);
	enic_set_rss_nic_cfg(enic);
	enic_dev_set_ig_vlan_rewrite_mode(enic);
	enic_open(enic->netdev);
	spin_unlock(&enic->enic_api_lock);
	call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);

	rtnl_unlock();
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 60 56.07% 1 33.33%
scott feldman scott feldman 39 36.45% 1 33.33%
neel patel neel patel 8 7.48% 1 33.33%
Total 107 100.00% 3 100.00%



static void enic_tx_hang_reset(struct work_struct *work)
{
	struct enic *enic = container_of(work, struct enic, tx_hang_reset);

	rtnl_lock();

	spin_lock(&enic->enic_api_lock);
	enic_dev_hang_notify(enic);
	enic_stop(enic->netdev);
	enic_dev_hang_reset(enic);
	enic_reset_addr_lists(enic);
	enic_init_vnic_resources(enic);
	enic_set_rss_nic_cfg(enic);
	enic_dev_set_ig_vlan_rewrite_mode(enic);
	enic_open(enic->netdev);
	spin_unlock(&enic->enic_api_lock);
	call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);

	rtnl_unlock();
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 39 38.61% 2 20.00%
govindarajulu varadarajan govindarajulu varadarajan 36 35.64% 1 10.00%
neel patel neel patel 17 16.83% 2 20.00%
vasanthy kolluri vasanthy kolluri 9 8.91% 5 50.00%
Total 101 100.00% 10 100.00%



static int enic_set_intr_mode(struct enic *enic)
{
	unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
	unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
	unsigned int i;

	/* Set interrupt mode (INTx, MSI, MSI-X) depending
         * on system capabilities.
         *
         * Try MSI-X first
         *
         * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
         * (the second to last INTR is used for WQ/RQ errors)
         * (the last INTR is used for notifications)
         */

	BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
	for (i = 0; i < n + m + 2; i++)
		enic->msix_entry[i].entry = i;

	/* Use multiple RQs if RSS is enabled
         */

	if (ENIC_SETTING(enic, RSS) &&
	    enic->config.intr_mode < 1 &&
	    enic->rq_count >= n &&
	    enic->wq_count >= m &&
	    enic->cq_count >= n + m &&
	    enic->intr_count >= n + m + 2) {

		if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
					  n + m + 2, n + m + 2) > 0) {

			enic->rq_count = n;
			enic->wq_count = m;
			enic->cq_count = n + m;
			enic->intr_count = n + m + 2;

			vnic_dev_set_intr_mode(enic->vdev,
				VNIC_DEV_INTR_MODE_MSIX);

			return 0;
		}
	}

	if (enic->config.intr_mode < 1 &&
	    enic->rq_count >= 1 &&
	    enic->wq_count >= m &&
	    enic->cq_count >= 1 + m &&
	    enic->intr_count >= 1 + m + 2) {
		if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
					  1 + m + 2, 1 + m + 2) > 0) {

			enic->rq_count = 1;
			enic->wq_count = m;
			enic->cq_count = 1 + m;
			enic->intr_count = 1 + m + 2;

			vnic_dev_set_intr_mode(enic->vdev,
				VNIC_DEV_INTR_MODE_MSIX);

			return 0;
		}
	}

	/* Next try MSI
         *
         * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
         */

	if (enic->config.intr_mode < 2 &&
	    enic->rq_count >= 1 &&
	    enic->wq_count >= 1 &&
	    enic->cq_count >= 2 &&
	    enic->intr_count >= 1 &&
	    !pci_enable_msi(enic->pdev)) {

		enic->rq_count = 1;
		enic->wq_count = 1;
		enic->cq_count = 2;
		enic->intr_count = 1;

		vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);

		return 0;
	}

	/* Next try INTx
         *
         * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
         * (the first INTR is used for WQ/RQ)
         * (the second INTR is used for WQ/RQ errors)
         * (the last INTR is used for notifications)
         */

	if (enic->config.intr_mode < 3 &&
	    enic->rq_count >= 1 &&
	    enic->wq_count >= 1 &&
	    enic->cq_count >= 2 &&
	    enic->intr_count >= 3) {

		enic->rq_count = 1;
		enic->wq_count = 1;
		enic->cq_count = 2;
		enic->intr_count = 3;

		vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);

		return 0;
	}

	vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);

	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 335 68.79% 1 25.00%
vasanthy kolluri vasanthy kolluri 134 27.52% 2 50.00%
alexander gordeev alexander gordeev 18 3.70% 1 25.00%
Total 487 100.00% 4 100.00%



static void enic_clear_intr_mode(struct enic *enic)
{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_MSIX:
		pci_disable_msix(enic->pdev);
		break;
	case VNIC_DEV_INTR_MODE_MSI:
		pci_disable_msi(enic->pdev);
		break;
	default:
		break;
	}

	vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%


static const struct net_device_ops enic_netdev_dynamic_ops = {
	.ndo_open		= enic_open,
	.ndo_stop		= enic_stop,
	.ndo_start_xmit		= enic_hard_start_xmit,
	.ndo_get_stats64	= enic_get_stats,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_rx_mode	= enic_set_rx_mode,
	.ndo_set_mac_address	= enic_set_mac_address_dynamic,
	.ndo_change_mtu		= enic_change_mtu,
	.ndo_vlan_rx_add_vid	= enic_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= enic_vlan_rx_kill_vid,
	.ndo_tx_timeout		= enic_tx_timeout,
	.ndo_set_vf_port	= enic_set_vf_port,
	.ndo_get_vf_port	= enic_get_vf_port,
	.ndo_set_vf_mac		= enic_set_vf_mac,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= enic_poll_controller,
#endif
#ifdef CONFIG_RFS_ACCEL
	.ndo_rx_flow_steer	= enic_rx_flow_steer,
#endif
#ifdef CONFIG_NET_RX_BUSY_POLL
	.ndo_busy_poll		= enic_busy_poll,
#endif
};


static const struct net_device_ops enic_netdev_ops = {
	.ndo_open		= enic_open,
	.ndo_stop		= enic_stop,
	.ndo_start_xmit		= enic_hard_start_xmit,
	.ndo_get_stats64	= enic_get_stats,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= enic_set_mac_address,
	.ndo_set_rx_mode	= enic_set_rx_mode,
	.ndo_change_mtu		= enic_change_mtu,
	.ndo_vlan_rx_add_vid	= enic_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= enic_vlan_rx_kill_vid,
	.ndo_tx_timeout		= enic_tx_timeout,
	.ndo_set_vf_port	= enic_set_vf_port,
	.ndo_get_vf_port	= enic_get_vf_port,
	.ndo_set_vf_mac		= enic_set_vf_mac,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= enic_poll_controller,
#endif
#ifdef CONFIG_RFS_ACCEL
	.ndo_rx_flow_steer	= enic_rx_flow_steer,
#endif
#ifdef CONFIG_NET_RX_BUSY_POLL
	.ndo_busy_poll		= enic_busy_poll,
#endif
};



static void enic_dev_deinit(struct enic *enic)
{
	unsigned int i;

	for (i = 0; i < enic->rq_count; i++) {
		napi_hash_del(&enic->napi[i]);
		netif_napi_del(&enic->napi[i]);
	}
	if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
		for (i = 0; i < enic->wq_count; i++)
			netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);

	enic_free_vnic_resources(enic);
	enic_clear_intr_mode(enic);
	enic_free_affinity_hint(enic);
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 60 54.05% 3 50.00%
scott feldman scott feldman 28 25.23% 1 16.67%
vasanthy kolluri vasanthy kolluri 23 20.72% 2 33.33%
Total 111 100.00% 6 100.00%



static void enic_kdump_kernel_config(struct enic *enic)
{
	if (is_kdump_kernel()) {
		dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
		enic->rq_count = 1;
		enic->wq_count = 1;
		enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
		enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
		enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
govindarajulu varadarajan govindarajulu varadarajan 75 100.00% 1 100.00%
Total 75 100.00% 1 100.00%



static int enic_dev_init(struct enic *enic)
{
	struct device *dev = enic_get_dev(enic);
	struct net_device *netdev = enic->netdev;
	unsigned int i;
	int err;

	/* Get interrupt coalesce timer info */
	err = enic_dev_intr_coal_timer_info(enic);
	if (err) {
		dev_warn(dev, "Using default conversion factor for "
			"interrupt coalesce timer\n");
		vnic_dev_intr_coal_timer_info_default(enic->vdev);
	}

	/* Get vNIC configuration
         */

	err = enic_get_vnic_config(enic);
	if (err) {
		dev_err(dev, "Get vNIC configuration failed, aborting\n");
		return err;
	}

	/* Get available resource counts
         */

	enic_get_res_counts(enic);

	/* modify resource count if we are in kdump_kernel
         */
	enic_kdump_kernel_config(enic);

	/* Set interrupt mode based on resource counts and system
         * capabilities
         */

	err = enic_set_intr_mode(enic);
	if (err) {
		dev_err(dev, "Failed to set intr mode based on resource "
			"counts and system capabilities, aborting\n");
		return err;
	}

	/* Allocate and configure vNIC resources
         */

	err = enic_alloc_vnic_resources(enic);
	if (err) {
		dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
		goto err_out_free_vnic_resources;
	}

	enic_init_vnic_resources(enic);

	err = enic_set_rss_nic_cfg(enic);
	if (err) {
		dev_err(dev, "Failed to config nic, aborting\n");
		goto err_out_free_vnic_resources;
	}

	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	default:
		netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
		break;
	case VNIC_DEV_INTR_MODE_MSIX:
		for (i = 0; i < enic->rq_count; i++) {
			netif_napi_add(netdev, &enic->napi[i],
				enic_poll_msix_rq, NAPI_POLL_WEIGHT);
		}
		for (i = 0; i < enic->wq_count; i++)
			netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
				       enic_poll_msix_wq, NAPI_POLL_WEIGHT);
		break;
	}

	return 0;

err_out_free_vnic_resources:
	enic_free_affinity_hint(enic);
	enic_clear_intr_mode(enic);
	enic_free_vnic_resources(enic);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 168 54.72% 2 20.00%
vasanthy kolluri vasanthy kolluri 86 28.01% 4 40.00%
govindarajulu varadarajan govindarajulu varadarajan 53 17.26% 4 40.00%
Total 307 100.00% 10 100.00%



static void enic_iounmap(struct enic *enic)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
		if (enic->bar[i].vaddr)
			iounmap(enic->bar[i].vaddr);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%



static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct device *dev = &pdev->dev;
	struct net_device *netdev;
	struct enic *enic;
	int using_dac = 0;
	unsigned int i;
	int err;
#ifdef CONFIG_PCI_IOV
	int pos = 0;
#endif
	int num_pps = 1;

	/* Allocate net device structure and initialize.  Private
         * instance data is initialized to zero.
         */

	netdev = alloc_etherdev_mqs(sizeof(struct enic),
				    ENIC_RQ_MAX, ENIC_WQ_MAX);
	if (!netdev)
		return -ENOMEM;

	pci_set_drvdata(pdev, netdev);

	SET_NETDEV_DEV(netdev, &pdev->dev);

	enic = netdev_priv(netdev);
	enic->netdev = netdev;
	enic->pdev = pdev;

	/* Setup PCI resources
         */

	err = pci_enable_device_mem(pdev);
	if (err) {
		dev_err(dev, "Cannot enable PCI device, aborting\n");
		goto err_out_free_netdev;
	}

	err = pci_request_regions(pdev, DRV_NAME);
	if (err) {
		dev_err(dev, "Cannot request PCI regions, aborting\n");
		goto err_out_disable_device;
	}

	pci_set_master(pdev);

	/* Query PCI controller on system for DMA addressing
         * limitation for the device.  Try 64-bit first, and
         * fail to 32-bit.
         */

	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (err) {
		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			dev_err(dev, "No usable DMA configuration, aborting\n");
			goto err_out_release_regions;
		}
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			dev_err(dev, "Unable to obtain %u-bit DMA "
				"for consistent allocations, aborting\n", 32);
			goto err_out_release_regions;
		}
	} else {
		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
		if (err) {
			dev_err(dev, "Unable to obtain %u-bit DMA "
				"for consistent allocations, aborting\n", 64);
			goto err_out_release_regions;
		}
		using_dac = 1;
	}

	/* Map vNIC resources from BAR0-5
         */

	for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
		if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
			continue;
		enic->bar[i].len = pci_resource_len(pdev, i);
		enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
		if (!enic->bar[i].vaddr) {
			dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
			err = -ENODEV;
			goto err_out_iounmap;
		}
		enic->bar[i].bus_addr = pci_resource_start(pdev, i);
	}

	/* Register vNIC device
         */

	enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
		ARRAY_SIZE(enic->bar));
	if (!enic->vdev) {
		dev_err(dev, "vNIC registration failed, aborting\n");
		err = -ENODEV;
		goto err_out_iounmap;
	}

	err = vnic_devcmd_init(enic->vdev);

	if (err)
		goto err_out_vnic_unregister;

#ifdef CONFIG_PCI_IOV
	/* Get number of subvnics */
	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
	if (pos) {
		pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
			&enic->num_vfs);
		if (enic->num_vfs) {
			err = pci_enable_sriov(pdev, enic->num_vfs);
			if (err) {
				dev_err(dev, "SRIOV enable failed, aborting."
					" pci_enable_sriov() returned %d\n",
					err);
				goto err_out_vnic_unregister;
			}
			enic->priv_flags |= ENIC_SRIOV_ENABLED;
			num_pps = enic->num_vfs;
		}
	}
#endif

	/* Allocate structure for port profiles */
	enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
	if (!enic->pp) {
		err = -ENOMEM;
		goto err_out_disable_sriov_pp;
	}

	/* Issue device open to get device in known state
         */

	err = enic_dev_open(enic);
	if (err) {
		dev_err(dev, "vNIC dev open failed, aborting\n");
		goto err_out_disable_sriov;
	}

	/* Setup devcmd lock
         */

	spin_lock_init(&enic->devcmd_lock);
	spin_lock_init(&enic->enic_api_lock);

	/*
         * Set ingress vlan rewrite mode before vnic initialization
         */

	err = enic_dev_set_ig_vlan_rewrite_mode(enic);
	if (err) {
		dev_err(dev,
			"Failed to set ingress vlan rewrite mode, aborting.\n");
		goto err_out_dev_close;
	}

	/* Issue device init to initialize the vnic-to-switch link.
         * We'll start with carrier off and wait for link UP
         * notification later to turn on carrier.  We don't need
         * to wait here for the vnic-to-switch link initialization
         * to complete; link UP notification is the indication that
         * the process is complete.
         */

	netif_carrier_off(netdev);

	/* Do not call dev_init for a dynamic vnic.
         * For a dynamic vnic, init_prov_info will be
         * called later by an upper layer.
         */

	if (!enic_is_dynamic(enic)) {
		err = vnic_dev_init(enic->vdev, 0);
		if (err) {
			dev_err(dev, "vNIC dev init failed, aborting\n");
			goto err_out_dev_close;
		}
	}

	err = enic_dev_init(enic);
	if (err) {
		dev_err(dev, "Device initialization failed, aborting\n");
		goto err_out_dev_close;
	}

	netif_set_real_num_tx_queues(netdev, enic->wq_count);
	netif_set_real_num_rx_queues(netdev, enic->rq_count);

	/* Setup notification timer, HW reset task, and wq locks
         */

	init_timer(&enic->notify_timer);
	enic->notify_timer.function = enic_notify_timer;
	enic->notify_timer.data = (unsigned long)enic;

	enic_set_rx_coal_setting(enic);
	INIT_WORK(&enic->reset, enic_reset);
	INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset);
	INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);

	for (i = 0; i < enic->wq_count; i++)
		spin_lock_init(&enic->wq_lock[i]);

	/* Register net device
         */

	enic->port_mtu = enic->config.mtu;
	(void)enic_change_mtu(netdev, enic->port_mtu);

	err = enic_set_mac_addr(netdev, enic->mac_addr);
	if (err) {
		dev_err(dev, "Invalid MAC address, aborting\n");
		goto err_out_dev_deinit;
	}

	enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
	/* rx coalesce time already got initialized. This gets used
         * if adaptive coal is turned off
         */
	enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;

	if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
		netdev->netdev_ops = &enic_netdev_dynamic_ops;
	else
		netdev->netdev_ops = &enic_netdev_ops;

	netdev->watchdog_timeo = 2 * HZ;
	enic_set_ethtool_ops(netdev);

	netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
	if (ENIC_SETTING(enic, LOOP)) {
		netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
		enic->loop_enable = 1;
		enic->loop_tag = enic->config.loop_tag;
		dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
	}
	if (ENIC_SETTING(enic, TXCSUM))
		netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
	if (ENIC_SETTING(enic, TSO))
		netdev->hw_features |= NETIF_F_TSO |
			NETIF_F_TSO6 | NETIF_F_TSO_ECN;
	if (ENIC_SETTING(enic, RSS))
		netdev->hw_features |= NETIF_F_RXHASH;
	if (ENIC_SETTING(enic, RXCSUM))
		netdev->hw_features |= NETIF_F_RXCSUM;

	netdev->features |= netdev->hw_features;
	netdev->vlan_features |= netdev->features;

#ifdef CONFIG_RFS_ACCEL
	netdev->hw_features |= NETIF_F_NTUPLE;
#endif

	if (using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

	netdev->priv_flags |= IFF_UNICAST_FLT;

	err = register_netdev(netdev);
	if (err) {
		dev_err(dev, "Cannot register net device, aborting\n");
		goto err_out_dev_deinit;
	}
	enic->rx_copybreak = RX_COPYBREAK_DEFAULT;

	return 0;

err_out_dev_deinit:
	enic_dev_deinit(enic);
err_out_dev_close:
	vnic_dev_close(enic->vdev);
err_out_disable_sriov:
	kfree(enic->pp);
err_out_disable_sriov_pp:
#ifdef CONFIG_PCI_IOV
	if (enic_sriov_enabled(enic)) {
		pci_disable_sriov(pdev);
		enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
	}
#endif
err_out_vnic_unregister:
	vnic_dev_unregister(enic->vdev);
err_out_iounmap:
	enic_iounmap(enic);
err_out_release_regions:
	pci_release_regions(pdev);
err_out_disable_device:
	pci_disable_device(pdev);
err_out_free_netdev:
	free_netdev(netdev);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 746 60.06% 6 16.22%
roopa prabhu roopa prabhu 188 15.14% 7 18.92%
vasanthy kolluri vasanthy kolluri 156 12.56% 5 13.51%
govindarajulu varadarajan govindarajulu varadarajan 51 4.11% 5 13.51%
govindarajulu.v govindarajulu.v 42 3.38% 3 8.11%
yang hongyang yang hongyang 14 1.13% 2 5.41%
michal miroslaw michal miroslaw 12 0.97% 1 2.70%
neel patel neel patel 11 0.89% 2 5.41%
sujith sankar sujith sankar 6 0.48% 1 2.70%
jiri pirko jiri pirko 6 0.48% 1 2.70%
stephen hemminger stephen hemminger 3 0.24% 1 2.70%
patrick mchardy patrick mchardy 3 0.24% 1 2.70%
david s. miller david s. miller 2 0.16% 1 2.70%
thomas meyer thomas meyer 2 0.16% 1 2.70%
Total 1242 100.00% 37 100.00%



static void enic_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);

	if (netdev) {
		struct enic *enic = netdev_priv(netdev);

		cancel_work_sync(&enic->reset);
		cancel_work_sync(&enic->change_mtu_work);
		unregister_netdev(netdev);
		enic_dev_deinit(enic);
		vnic_dev_close(enic->vdev);
#ifdef CONFIG_PCI_IOV
		if (enic_sriov_enabled(enic)) {
			pci_disable_sriov(pdev);
			enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
		}
#endif
		kfree(enic->pp);
		vnic_dev_unregister(enic->vdev);
		enic_iounmap(enic);
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		free_netdev(netdev);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 82 63.08% 2 33.33%
roopa prabhu roopa prabhu 41 31.54% 3 50.00%
tejun heo tejun heo 7 5.38% 1 16.67%
Total 130 100.00% 6 100.00%


static struct pci_driver enic_driver = {
	.name = DRV_NAME,
	.id_table = enic_id_table,
	.probe = enic_probe,
	.remove = enic_remove,
};



static int __init enic_init_module(void)
{
	pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);

	return pci_register_driver(&enic_driver);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 21 84.00% 1 50.00%
vasanthy kolluri vasanthy kolluri 4 16.00% 1 50.00%
Total 25 100.00% 2 100.00%



static void __exit enic_cleanup_module(void)
{
	pci_unregister_driver(&enic_driver);
}

Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


module_init(enic_init_module);

module_exit(enic_cleanup_module);
Overall Contributors
Person Tokens Prop Commits CommitProp
scott feldman scott feldman 6452 47.54% 21 15.44%
govindarajulu varadarajan govindarajulu varadarajan 2744 20.22% 29 21.32%
vasanthy kolluri vasanthy kolluri 1581 11.65% 19 13.97%
roopa prabhu roopa prabhu 1339 9.87% 17 12.50%
sujith sankar sujith sankar 514 3.79% 2 1.47%
alexander duyck alexander duyck 269 1.98% 1 0.74%
neel patel neel patel 168 1.24% 3 2.21%
govindarajulu.v govindarajulu.v 113 0.83% 3 2.21%
stephen hemminger stephen hemminger 81 0.60% 5 3.68%
eric dumazet eric dumazet 71 0.52% 3 2.21%
dan carpenter dan carpenter 52 0.38% 1 0.74%
david s. miller david s. miller 32 0.24% 2 1.47%
michal miroslaw michal miroslaw 19 0.14% 2 1.47%
alexander gordeev alexander gordeev 18 0.13% 1 0.74%
jiri pirko jiri pirko 16 0.12% 4 2.94%
yang hongyang yang hongyang 14 0.10% 2 1.47%
ian campbell ian campbell 12 0.09% 2 1.47%
tom herbert tom herbert 11 0.08% 1 0.74%
patrick mchardy patrick mchardy 8 0.06% 2 1.47%
joe perches joe perches 8 0.06% 2 1.47%
tony camuso tony camuso 8 0.06% 1 0.74%
tejun heo tejun heo 7 0.05% 1 0.74%
konstantin khlebnikov konstantin khlebnikov 6 0.04% 1 0.74%
benoit taine benoit taine 6 0.04% 1 0.74%
eric w. biederman eric w. biederman 4 0.03% 2 1.47%
prabhakar lad prabhakar lad 3 0.02% 1 0.74%
paul gortmaker paul gortmaker 3 0.02% 1 0.74%
kamalesh babulal kamalesh babulal 3 0.02% 1 0.74%
alexey dobriyan alexey dobriyan 3 0.02% 1 0.74%
thomas meyer thomas meyer 2 0.01% 1 0.74%
harvey harrison harvey harrison 2 0.01% 1 0.74%
ben hutchings ben hutchings 1 0.01% 1 0.74%
danny kukawka danny kukawka 1 0.01% 1 0.74%
Total 13571 100.00% 136 100.00%
  Directory: drivers/net/ethernet/cisco/enic

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
govindarajulu varadarajan	govindarajulu varadarajan	121	100.00%	1	100.00%
	Total	121	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/ethernet/cisco/enic/enic_main.c

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