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liquidio CN23XX: VF scatter gather lists

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Adds support for VF scatter gather lists.

Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raghu Vatsavayi 2016-12-07 08:54:34 -08:00 committed by David S. Miller
parent 50f7f94b96
commit beea50a5d5
1 changed files with 134 additions and 0 deletions
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134
drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
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@ -55,10 +55,28 @@ struct liquidio_if_cfg_resp {
u64 status;
};
#define OCTNIC_MAX_SG (MAX_SKB_FRAGS)
#define OCTNIC_GSO_MAX_HEADER_SIZE 128
#define OCTNIC_GSO_MAX_SIZE \
(CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
struct octnic_gather {
/* List manipulation. Next and prev pointers. */
struct list_head list;
/* Size of the gather component at sg in bytes. */
int sg_size;
/* Number of bytes that sg was adjusted to make it 8B-aligned. */
int adjust;
/* Gather component that can accommodate max sized fragment list
* received from the IP layer.
*/
struct octeon_sg_entry *sg;
};
struct octeon_device_priv {
/* Tasklet structures for this device. */
struct tasklet_struct droq_tasklet;
@ -236,6 +254,114 @@ static void start_txq(struct net_device *netdev)
}
}
/**
* Remove the node at the head of the list. The list would be empty at
* the end of this call if there are no more nodes in the list.
*/
static struct list_head *list_delete_head(struct list_head *root)
{
struct list_head *node;
if ((root->prev == root) && (root->next == root))
node = NULL;
else
node = root->next;
if (node)
list_del(node);
return node;
}
/**
* \brief Delete gather lists
* @param lio per-network private data
*/
static void delete_glists(struct lio *lio)
{
struct octnic_gather *g;
int i;
if (!lio->glist)
return;
for (i = 0; i < lio->linfo.num_txpciq; i++) {
do {
g = (struct octnic_gather *)
list_delete_head(&lio->glist[i]);
if (g) {
if (g->sg)
kfree((void *)((unsigned long)g->sg -
g->adjust));
kfree(g);
}
} while (g);
}
kfree(lio->glist);
kfree(lio->glist_lock);
}
/**
* \brief Setup gather lists
* @param lio per-network private data
*/
static int setup_glists(struct lio *lio, int num_iqs)
{
struct octnic_gather *g;
int i, j;
lio->glist_lock =
kzalloc(sizeof(*lio->glist_lock) * num_iqs, GFP_KERNEL);
if (!lio->glist_lock)
return 1;
lio->glist =
kzalloc(sizeof(*lio->glist) * num_iqs, GFP_KERNEL);
if (!lio->glist) {
kfree(lio->glist_lock);
return 1;
}
for (i = 0; i < num_iqs; i++) {
spin_lock_init(&lio->glist_lock[i]);
INIT_LIST_HEAD(&lio->glist[i]);
for (j = 0; j < lio->tx_qsize; j++) {
g = kzalloc(sizeof(*g), GFP_KERNEL);
if (!g)
break;
g->sg_size = ((ROUNDUP4(OCTNIC_MAX_SG) >> 2) *
OCT_SG_ENTRY_SIZE);
g->sg = kmalloc(g->sg_size + 8, GFP_KERNEL);
if (!g->sg) {
kfree(g);
break;
}
/* The gather component should be aligned on 64-bit
* boundary
*/
if (((unsigned long)g->sg) & 7) {
g->adjust = 8 - (((unsigned long)g->sg) & 7);
g->sg = (struct octeon_sg_entry *)
((unsigned long)g->sg + g->adjust);
}
list_add_tail(&g->list, &lio->glist[i]);
}
if (j != lio->tx_qsize) {
delete_glists(lio);
return 1;
}
}
return 0;
}
/**
* \brief Print link information
* @param netdev network device
@ -681,6 +807,8 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
cleanup_link_status_change_wq(netdev);
delete_glists(lio);
free_netdev(netdev);
oct->props[ifidx].gmxport = -1;
@ -1379,6 +1507,12 @@ static int setup_nic_devices(struct octeon_device *octeon_dev)
/* Copy MAC Address to OS network device structure */
ether_addr_copy(netdev->dev_addr, mac);
if (setup_glists(lio, num_iqueues)) {
dev_err(&octeon_dev->pci_dev->dev,
"Gather list allocation failed\n");
goto setup_nic_dev_fail;
}
if (netdev->features & NETIF_F_LRO)
liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
OCTNIC_LROIPV4 | OCTNIC_LROIPV6);