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cxgb4: IPv6 filter takes 2 tids 

on T6, IPv6 filter would occupy 2 tids instead of 4.

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ganesh Goudar 2018-01-17 12:57:34 +05:30 committed by David S. Miller
parent bfd072df10
commit 24949304c9
1 changed files with 80 additions and 33 deletions
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79
drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
View File

@ -439,19 +439,32 @@ int cxgb4_get_free_ftid(struct net_device *dev, int family)
if (ftid >= t->nftids)
ftid = -1;
} else {
ftid = bitmap_find_free_region(t->ftid_bmap, t->nftids, 2);
if (is_t6(adap->params.chip)) {
ftid = bitmap_find_free_region(t->ftid_bmap,
t->nftids, 1);
if (ftid < 0)
goto out_unlock;
/* this is only a lookup, keep the found region
* unallocated
*/
bitmap_release_region(t->ftid_bmap, ftid, 1);
} else {
ftid = bitmap_find_free_region(t->ftid_bmap,
t->nftids, 2);
if (ftid < 0)
goto out_unlock;
/* this is only a lookup, keep the found region unallocated */
bitmap_release_region(t->ftid_bmap, ftid, 2);
}
}
out_unlock:
spin_unlock_bh(&t->ftid_lock);
return ftid;
}
static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family)
static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family,
unsigned int chip_ver)
{
spin_lock_bh(&t->ftid_lock);
@ -460,22 +473,31 @@ static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family)
return -EBUSY;
}
if (family == PF_INET)
if (family == PF_INET) {
__set_bit(fidx, t->ftid_bmap);
else
} else {
if (chip_ver < CHELSIO_T6)
bitmap_allocate_region(t->ftid_bmap, fidx, 2);
else
bitmap_allocate_region(t->ftid_bmap, fidx, 1);
}
spin_unlock_bh(&t->ftid_lock);
return 0;
}
static void cxgb4_clear_ftid(struct tid_info *t, int fidx, int family)
static void cxgb4_clear_ftid(struct tid_info *t, int fidx, int family,
unsigned int chip_ver)
{
spin_lock_bh(&t->ftid_lock);
if (family == PF_INET)
if (family == PF_INET) {
__clear_bit(fidx, t->ftid_bmap);
else
} else {
if (chip_ver < CHELSIO_T6)
bitmap_release_region(t->ftid_bmap, fidx, 2);
else
bitmap_release_region(t->ftid_bmap, fidx, 1);
}
spin_unlock_bh(&t->ftid_lock);
}
@ -1249,6 +1271,7 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
}
}
} else { /* IPv6 */
if (chip_ver < CHELSIO_T6) {
/* Ensure that the IPv6 filter is aligned on a
* multiple of 4 boundary.
*/
@ -1258,14 +1281,32 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
return -EINVAL;
}
/* Check all except the base overlapping IPv4 filter slots. */
for (fidx = filter_id + 1; fidx < filter_id + 4; fidx++) {
/* Check all except the base overlapping IPv4 filter
* slots.
*/
for (fidx = filter_id + 1; fidx < filter_id + 4;
fidx++) {
f = &adapter->tids.ftid_tab[fidx];
if (f->valid) {
dev_err(adapter->pdev_dev,
"Invalid location. IPv6 requires 4 slots and an IPv4 filter exists at %u\n",
fidx);
return -EBUSY;
}
}
} else {
/* For T6, CLIP being enabled, IPv6 filter would occupy
* 2 entries.
*/
if (filter_id & 0x1)
return -EINVAL;
/* Check overlapping IPv4 filter slot */
fidx = filter_id + 1;
f = &adapter->tids.ftid_tab[fidx];
if (f->valid) {
pr_err("%s: IPv6 filter requires 2 indices. IPv4 filter already present at %d. Please remove IPv4 filter first.\n",
__func__, fidx);
return -EBUSY;
}
}
}
@ -1279,16 +1320,18 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
fidx = filter_id + adapter->tids.ftid_base;
ret = cxgb4_set_ftid(&adapter->tids, filter_id,
fs->type ? PF_INET6 : PF_INET);
fs->type ? PF_INET6 : PF_INET,
chip_ver);
if (ret)
return ret;
/* Check to make sure the filter requested is writable ... */
/* Check t make sure the filter requested is writable ... */
ret = writable_filter(f);
if (ret) {
/* Clear the bits we have set above */
cxgb4_clear_ftid(&adapter->tids, filter_id,
fs->type ? PF_INET6 : PF_INET);
fs->type ? PF_INET6 : PF_INET,
chip_ver);
return ret;
}
@ -1303,7 +1346,8 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
IPV6_ADDR_ANY) {
ret = cxgb4_clip_get(dev, (const u32 *)&fs->val.lip, 1);
if (ret) {
cxgb4_clear_ftid(&adapter->tids, filter_id, PF_INET6);
cxgb4_clear_ftid(&adapter->tids, filter_id, PF_INET6,
chip_ver);
return ret;
}
}
@ -1333,7 +1377,8 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
ret = set_filter_wr(adapter, filter_id);
if (ret) {
cxgb4_clear_ftid(&adapter->tids, filter_id,
fs->type ? PF_INET6 : PF_INET);
fs->type ? PF_INET6 : PF_INET,
chip_ver);
clear_filter(adapter, f);
}
@ -1411,6 +1456,7 @@ int __cxgb4_del_filter(struct net_device *dev, int filter_id,
struct filter_ctx *ctx)
{
struct adapter *adapter = netdev2adap(dev);
unsigned int chip_ver = CHELSIO_CHIP_VERSION(adapter->params.chip);
struct filter_entry *f;
unsigned int max_fidx;
int ret;
@ -1436,7 +1482,8 @@ int __cxgb4_del_filter(struct net_device *dev, int filter_id,
if (f->valid) {
f->ctx = ctx;
cxgb4_clear_ftid(&adapter->tids, filter_id,
f->fs.type ? PF_INET6 : PF_INET);
f->fs.type ? PF_INET6 : PF_INET,
chip_ver);
return del_filter_wr(adapter, filter_id);
}