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nvethernet: support for jumbo frames

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Bug 200513783

Change-Id: I17d3e7e7cf7387814c6a2d60b69ac15e370f93c9
Signed-off-by: Bhadram Varka <vbhadram@nvidia.com>
Signed-off-by: Narayan Reddy <narayanr@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2094022
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Srinivas Ramachandran <srinivasra@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Rakesh Goyal <rgoyal@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Bhadram Varka
2019-04-09 16:21:06 +05:30
committed by Revanth Kumar Uppala
parent 3fa01bcd71
commit 7676530a02
1 changed files with 50 additions and 7 deletions
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57
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
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@@ -391,7 +391,8 @@ static void ether_napi_enable(struct ether_priv_data *pdata)
}
}
static void ether_free_rx_skbs(struct osi_rx_swcx *rx_swcx, struct device *dev)
static void ether_free_rx_skbs(struct osi_rx_swcx *rx_swcx, struct device *dev,
unsigned int rx_buf_len)
{
struct osi_rx_swcx *prx_swcx = NULL;
unsigned int i;
@@ -400,9 +401,8 @@ static void ether_free_rx_skbs(struct osi_rx_swcx *rx_swcx, struct device *dev)
prx_swcx = rx_swcx + i;
if (prx_swcx->buf_virt_addr != NULL) {
/* TODO: Need to get Rx buffer len */
dma_unmap_single(dev, prx_swcx->buf_phy_addr,
1536, DMA_FROM_DEVICE);
rx_buf_len, DMA_FROM_DEVICE);
dev_kfree_skb_any(prx_swcx->buf_virt_addr);
prx_swcx->buf_virt_addr = NULL;
prx_swcx->buf_phy_addr = 0;
@@ -435,7 +435,8 @@ static void free_rx_dma_resources(struct osi_dma_priv_data *osi_dma,
if (rx_ring != NULL) {
if (rx_ring->rx_swcx != NULL) {
ether_free_rx_skbs(rx_ring->rx_swcx, dev);
ether_free_rx_skbs(rx_ring->rx_swcx, dev,
osi_dma->rx_buf_len);
kfree(rx_ring->rx_swcx);
}
@@ -517,6 +518,7 @@ err_rx_desc:
static int ether_allocate_rx_buffers(struct ether_priv_data *pdata,
struct osi_rx_ring *rx_ring)
{
unsigned int rx_buf_len = pdata->osi_dma->rx_buf_len;
struct osi_rx_swcx *rx_swcx = NULL;
unsigned int i = 0;
@@ -526,15 +528,14 @@ static int ether_allocate_rx_buffers(struct ether_priv_data *pdata,
rx_swcx = rx_ring->rx_swcx + i;
/* FIXME: hardcoding Rx DMA buf len here */
skb = __netdev_alloc_skb_ip_align(pdata->ndev, 1536,
skb = __netdev_alloc_skb_ip_align(pdata->ndev, rx_buf_len,
GFP_KERNEL);
if (unlikely(skb == NULL)) {
dev_err(pdata->dev, "RX skb allocation failed\n");
return -ENOMEM;
}
dma_addr = dma_map_single(pdata->dev, skb->data, 1536,
dma_addr = dma_map_single(pdata->dev, skb->data, rx_buf_len,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(pdata->dev, dma_addr) != 0)) {
dev_err(pdata->dev, "RX skb dma map failed\n");
@@ -877,6 +878,8 @@ static int ether_open(struct net_device *dev)
goto err_r_irq;
}
osi_set_rx_buf_len(pdata->osi_dma);
ret = ether_allocate_dma_resources(pdata);
if (ret < 0) {
dev_err(pdata->dev, "failed to allocate DMA resources\n");
@@ -1157,12 +1160,48 @@ static int ether_set_mac_addr(struct net_device *ndev, void *addr)
return ret;
}
/**
* ether_change_mtu - Change MAC MTU size
* @ndev: Network device structure
* @new_mtu: New MTU size to set.
*
* Algorithm:
* 1) Check and return if interface is up.
* 2) Stores new MTU size set by user in OSI core data structure.
*
* Dependencies: Ethernet interface need to be down to change MTU size
*
* Protection: None.
*
* Return: 0 - success, negative value - failure.
*/
static int ether_change_mtu(struct net_device *ndev, int new_mtu)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
if (netif_running(ndev)) {
netdev_err(pdata->ndev, "must be stopped to change its MTU\n");
return -EBUSY;
}
ndev->mtu = new_mtu;
osi_core->mtu = new_mtu;
osi_dma->mtu = new_mtu;
netdev_update_features(ndev);
return 0;
}
static const struct net_device_ops ether_netdev_ops = {
.ndo_open = ether_open,
.ndo_stop = ether_close,
.ndo_start_xmit = ether_start_xmit,
.ndo_do_ioctl = ether_ioctl,
.ndo_set_mac_address = ether_set_mac_addr,
.ndo_change_mtu = ether_change_mtu,
};
/**
@@ -2136,6 +2175,10 @@ static int ether_probe(struct platform_device *pdev)
osi_core->mac = mac;
osi_dma->mac = mac;
osi_core->mtu = ndev->mtu;
osi_dma->mtu = ndev->mtu;
ndev->max_mtu = OSI_MAX_MTU_SIZE;
/* Initialize core and DMA ops based on MAC type */
osi_init_core_ops(osi_core);
osi_init_dma_ops(osi_dma);