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ionic: get MTU from lif identity 

Change from using hardcoded MTU limits and instead use the
firmware defined limits. The value from the LIF attributes is
the frame size, so we take off the header size to convert to
MTU size.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2020-07-21 13:34:04 -07:00 committed by David S. Miller
parent 4787dd582d
commit 4b03b27349
3 changed files with 15 additions and 5 deletions
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2
drivers/net/ethernet/pensando/ionic/ionic_dev.h
View File

@ -10,8 +10,6 @@
#include "ionic_if.h"
#include "ionic_regs.h"
#define IONIC_MIN_MTU ETH_MIN_MTU
#define IONIC_MAX_MTU 9194
#define IONIC_MAX_TX_DESC 8192
#define IONIC_MAX_RX_DESC 16384
#define IONIC_MIN_TXRX_DESC 16

17
drivers/net/ethernet/pensando/ionic/ionic_lif.c
View File

@ -5,6 +5,7 @@
#include <linux/dynamic_debug.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/rtnetlink.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
@ -2022,11 +2023,16 @@ reset_out:
static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index)
{
struct device *dev = ionic->dev;
union ionic_lif_identity *lid;
struct net_device *netdev;
struct ionic_lif *lif;
int tbl_sz;
int err;
lid = kzalloc(sizeof(*lid), GFP_KERNEL);
if (!lid)
return ERR_PTR(-ENOMEM);
netdev = alloc_etherdev_mqs(sizeof(*lif),
ionic->ntxqs_per_lif, ionic->ntxqs_per_lif);
if (!netdev) {
@ -2045,8 +2051,12 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
netdev->watchdog_timeo = 2 * HZ;
netif_carrier_off(netdev);
netdev->min_mtu = IONIC_MIN_MTU;
netdev->max_mtu = IONIC_MAX_MTU;
lif->identity = lid;
lif->lif_type = IONIC_LIF_TYPE_CLASSIC;
ionic_lif_identify(ionic, lif->lif_type, lif->identity);
lif->netdev->min_mtu = le32_to_cpu(lif->identity->eth.min_frame_size);
lif->netdev->max_mtu =
le32_to_cpu(lif->identity->eth.max_frame_size) - ETH_HLEN - VLAN_HLEN;
lif->neqs = ionic->neqs_per_lif;
lif->nxqs = ionic->ntxqs_per_lif;
@ -2113,6 +2123,7 @@ err_out_free_lif_info:
err_out_free_netdev:
free_netdev(lif->netdev);
lif = NULL;
kfree(lid);
return ERR_PTR(err);
}
@ -2132,7 +2143,6 @@ int ionic_lifs_alloc(struct ionic *ionic)
return -ENOMEM;
}
lif->lif_type = IONIC_LIF_TYPE_CLASSIC;
ionic_lif_queue_identify(lif);
return 0;
@ -2243,6 +2253,7 @@ static void ionic_lif_free(struct ionic_lif *lif)
ionic_lif_reset(lif);
/* free lif info */
kfree(lif->identity);
dma_free_coherent(dev, lif->info_sz, lif->info, lif->info_pa);
lif->info = NULL;
lif->info_pa = 0;

1
drivers/net/ethernet/pensando/ionic/ionic_lif.h
View File

@ -184,6 +184,7 @@ struct ionic_lif {
u16 lif_type;
unsigned int nucast;
union ionic_lif_identity *identity;
struct ionic_lif_info *info;
dma_addr_t info_pa;
u32 info_sz;