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nvethernet: Add support for MACsec controller

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This commit adds the driver interface for the
MACsec controller. The driver interface is
invoked using generic netlink messages from
userspace MACsec key agreement agent.

Currently sysfs node is added to check the irq
stats for default macsec controller operation.

Bug 2913560

Change-Id: I07b0b778ba1c6674e87b103a3e68e158fea61c2c
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
This commit is contained in:
Srinivas Ramachandran
2020-11-30 15:12:48 -08:00
committed by Revanth Kumar Uppala
parent c651869a94
commit 805fe9c4fa
6 changed files with 2958 additions and 7 deletions
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82
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
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@@ -804,7 +804,7 @@ static int ether_init_ivc(struct ether_priv_data *pdata)
}
dev_info(dev, "Reserved IVC channel #%u - frame_size=%d irq %d\n",
id, ictxt->ivck->frame_size, ictxt->ivck->irq);
id, ictxt->ivck->frame_size, ictxt->ivck->irq);
osi_core->osd_ops.ivc_send = osd_ivc_send_cmd;
init_completion(&ictxt->msg_complete);
ether_start_ivc(pdata);
@@ -1603,6 +1603,14 @@ static void ether_reset(struct ether_priv_data *pdata)
unsigned int val;
void __iomem *addr = devm_ioremap(pdata->dev, 0x21460018, 0x4);
#if 1 /* Rakesh WAR for AN 0 issue */
/* power ungate and ether_reset will be moved to bpmp fw so reset()
* api should be called. TODO HACK by writing oxffff to
* CLK_RST_CONTROLLER_RST_DEV_MGBE_0
*/
writel(0xffff, addr);
#endif
val = readl(addr);
val &= ~BIT(0);
writel(val, addr);
@@ -1614,6 +1622,15 @@ static void ether_reset(struct ether_priv_data *pdata)
val = readl(addr);
val &= ~BIT(8);
writel(val, addr);
#if 1
/* NET30 enables secure reset, WAR to reset macsec secure RST, this
* should be moved to bbmp fw
*/
val = readl(addr);
val &= ~BIT(12);
writel(val, addr);
#endif
}
static void power_ungate(struct ether_priv_data *pdata)
@@ -1776,6 +1793,17 @@ static int ether_open(struct net_device *dev)
/* Enable napi before requesting irq to be ready to handle it */
ether_napi_enable(pdata);
#ifdef MACSEC_SUPPORT
#ifdef DEBUG_MACSEC
ret = macsec_open(pdata->macsec_pdata);
if (ret < 0) {
dev_err(&dev->dev, "%s: failed to open macsec with reason %d\n",
__func__, ret);
goto err_macsec_open;
}
#endif
#endif /* MACSEC_SUPPORT */
/* request tx/rx/common irq */
ret = ether_request_irqs(pdata);
if (ret < 0) {
@@ -1802,6 +1830,11 @@ static int ether_open(struct net_device *dev)
return ret;
#ifdef MACSEC_SUPPORT
#ifdef DEBUG_MACSEC
err_macsec_open:
#endif
#endif /* MACSEC_SUPPORT */
err_r_irq:
ether_napi_disable(pdata);
ether_ptp_remove(pdata);
@@ -1944,6 +1977,15 @@ static int ether_close(struct net_device *ndev)
/* Disable clock */
ether_disable_clks(pdata);
#ifdef MACSEC_SUPPORT
#ifdef DEBUG_MACSEC
ret = macsec_close(pdata->macsec_pdata);
if (ret < 0) {
dev_err(pdata->dev, "Failed to close macsec");
}
#endif
#endif /* MACSEC_SUPPORT */
/* Reset stats since interface is going down */
ether_reset_stats(pdata);
@@ -4482,6 +4524,11 @@ static int ether_probe(struct platform_device *pdev)
struct net_device *ndev;
int ret = 0, i;
#ifdef TEST
macsec_genl_register();
return 0;
#endif /* TEST */
ether_get_num_dma_chan_mtl_q(pdev, &num_dma_chans,
&mac, &num_mtl_queues);
@@ -4619,6 +4666,28 @@ static int ether_probe(struct platform_device *pdev)
ether_tx_usecs_hrtimer;
}
#ifdef MACSEC_SUPPORT
ret = macsec_probe(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to setup macsec\n");
goto err_macsec;
} else if (ret == 0) {
/* Macsec is initialized, reduce MTU
* TODO: MTU_ADDONS also to be reduced ?
*/
pdata->max_platform_mtu -= MACSEC_TAG_ICV_LEN;
ndev->max_mtu = pdata->max_platform_mtu;
osi_core->mtu -= MACSEC_TAG_ICV_LEN;
osi_dma->mtu = osi_core->mtu;
ndev->mtu = osi_core->mtu;
dev_info(&pdev->dev, "Macsec: Reduced MTU: %d Max: %d\n",
ndev->mtu, ndev->max_mtu);
} else {
; //Nothing to do, macsec is not supported
dev_info(&pdev->dev, "Macsec not enabled - ignore\n");
}
#endif /* MACSEC_SUPPORT */
ret = register_netdev(ndev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register netdev\n");
@@ -4656,6 +4725,9 @@ static int ether_probe(struct platform_device *pdev)
err_sysfs:
unregister_netdev(ndev);
err_netdev:
#ifdef MACSEC_SUPPORT
err_macsec:
#endif /* MACSEC_SUPPORT */
err_napi:
mdiobus_unregister(pdata->mii);
err_dma_mask:
@@ -4688,6 +4760,14 @@ static int ether_remove(struct platform_device *pdev)
struct net_device *ndev = platform_get_drvdata(pdev);
struct ether_priv_data *pdata = netdev_priv(ndev);
#ifdef MACSEC_SUPPORT
#ifdef TEST
macsec_genl_unregister();
return 0;
#endif /* TEST */
macsec_remove(pdata);
#endif /* MACSEC_SUPPORT */
unregister_netdev(ndev);
/* remove nvethernet sysfs group under /sys/devices/<ether_device>/ */