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Date: Mon, 12 Sep 2016 13:42:39 +0530
From: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, hariprasad@...lsio.com, leedom@...lsio.com,
nirranjan@...lsio.com, indranil@...lsio.com,
Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Subject: [PATCH net-next 6/7] cxgb4: add support for deleting u32 filters
Add support for deleting an offloaded u32 filter from hardware. If a
link is deleted, then all corresponding filters associated with the link
are also deleted. Also enable hardware tc offload as a supported
feature.
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@...lsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 5 +-
drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c | 92 +++++++++++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.h | 2 +
3 files changed, 98 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 28396f5..087066a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3047,6 +3047,8 @@ int cxgb_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
case TC_CLSU32_NEW_KNODE:
case TC_CLSU32_REPLACE_KNODE:
return cxgb4_config_knode(dev, proto, tc->cls_u32);
+ case TC_CLSU32_DELETE_KNODE:
+ return cxgb4_delete_knode(dev, proto, tc->cls_u32);
default:
return -EOPNOTSUPP;
}
@@ -5155,7 +5157,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->hw_features = NETIF_F_SG | TSO_FLAGS |
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM | NETIF_F_RXHASH |
- NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
+ NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
+ NETIF_F_HW_TC;
if (highdma)
netdev->hw_features |= NETIF_F_HIGHDMA;
netdev->features |= netdev->hw_features;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
index 62c1695..31847e3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
@@ -279,6 +279,98 @@ out:
return ret;
}
+int cxgb4_delete_knode(struct net_device *dev, __be16 protocol,
+ struct tc_cls_u32_offload *cls)
+{
+ struct adapter *adapter = netdev2adap(dev);
+ struct cxgb4_tc_u32_table *t;
+ struct cxgb4_link *link = NULL;
+ struct filter_ctx ctx;
+ u32 handle, uhtid;
+ unsigned int filter_id;
+ unsigned int max_tids;
+ unsigned int i, j;
+ int ret;
+
+ if (!can_tc_u32_offload(dev))
+ return -EOPNOTSUPP;
+
+ /* Fetch the location to delete the filter. */
+ filter_id = (cls->knode.handle & 0xFFFFF);
+
+ if (filter_id > adapter->tids.nftids) {
+ dev_err(adapter->pdev_dev,
+ "Location %d out of range for deletion. Max: %d\n",
+ filter_id, adapter->tids.nftids);
+ return -ERANGE;
+ }
+
+ t = adapter->tc_u32;
+ handle = cls->knode.handle;
+ uhtid = TC_U32_USERHTID(cls->knode.handle);
+
+ /* Ensure that uhtid is either root u32 (i.e. 0x800)
+ * or a a valid linked bucket.
+ */
+ if (uhtid != 0x800 && uhtid >= t->size)
+ return -EINVAL;
+
+ /* Delete the specified filter */
+ if (uhtid != 0x800) {
+ link = &t->table[uhtid - 1];
+ if (!link->link_handle)
+ return -EINVAL;
+
+ if (!test_bit(filter_id, link->tid_map))
+ return -EINVAL;
+ }
+
+ init_completion(&ctx.completion);
+
+ ret = cxgb4_del_filter(dev, filter_id, &ctx);
+ if (ret)
+ goto out;
+
+ /* Wait for reply */
+ ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ);
+ if (!ret)
+ return -ETIMEDOUT;
+
+ ret = ctx.result;
+ if (!ret && link)
+ clear_bit(filter_id, link->tid_map);
+
+ /* If a link is being deleted, then delete all filters
+ * associated with the link.
+ */
+ max_tids = adapter->tids.nftids;
+ for (i = 0; i < t->size; i++) {
+ link = &t->table[i];
+
+ if (link->link_handle == handle) {
+ for (j = 0; j < max_tids; j++) {
+ if (!test_bit(j, link->tid_map))
+ continue;
+
+ ret = cxgb4_del_filter(dev, j, NULL);
+ if (ret)
+ goto out;
+
+ clear_bit(j, link->tid_map);
+ }
+
+ /* Clear the link state */
+ link->match_field = NULL;
+ link->link_handle = 0;
+ memset(&link->fs, 0, sizeof(link->fs));
+ break;
+ }
+ }
+
+out:
+ return ret;
+}
+
void cxgb4_cleanup_tc_u32(struct adapter *adap)
{
struct cxgb4_tc_u32_table *t;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.h
index 46575843..6bdc885 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.h
@@ -48,6 +48,8 @@ static inline bool can_tc_u32_offload(struct net_device *dev)
int cxgb4_config_knode(struct net_device *dev, __be16 protocol,
struct tc_cls_u32_offload *cls);
+int cxgb4_delete_knode(struct net_device *dev, __be16 protocol,
+ struct tc_cls_u32_offload *cls);
void cxgb4_cleanup_tc_u32(struct adapter *adapter);
struct cxgb4_tc_u32_table *cxgb4_init_tc_u32(struct adapter *adap,
--
2.5.3
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