The Compressed LIP region is used to hold a limited number of Local IPv6
addresses. This region is primarily used to reduce the TCAM space consumed for
an IPv6 offloaded connection. A 128-bit LIP will be reduced to 13-bit and stored
in the TCAM if there is a match between the IPv6 tuple's LIP and the one stored
in the CLIP region.
Signed-off-by: Vipul Pandya <vi...@chelsio.com>
---
V2: Used local variables instead of typecasting in patch 1/4.
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 206 ++++++++++++++++++++++++
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h | 23 +++
2 files changed, 229 insertions(+)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index d1d6ff7..4ae287c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -60,6 +60,7 @@
#include <linux/workqueue.h>
#include <net/neighbour.h>
#include <net/netevent.h>
+#include <net/addrconf.h>
#include <asm/uaccess.h>
#include "cxgb4.h"
@@ -68,6 +69,11 @@
#include "t4fw_api.h"
#include "l2t.h"
+#include <../drivers/net/bonding/bonding.h>
+
+#ifdef DRV_VERSION
+#undef DRV_VERSION
+#endif
#define DRV_VERSION "2.0.0-ko"
#define DRV_DESC "Chelsio T4/T5 Network Driver"
@@ -3227,6 +3233,38 @@ static int tid_init(struct tid_info *t)
return 0;
}
+static int cxgb4_clip_get(const struct net_device *dev,
+ const struct in6_addr *lip)
+{
+ struct adapter *adap;
+ struct fw_clip_cmd c;
+
+ adap = netdev2adap(dev);
+ memset(&c, 0, sizeof(c));
+ c.op_to_write = htonl(FW_CMD_OP(FW_CLIP_CMD) |
+ FW_CMD_REQUEST | FW_CMD_WRITE);
+ c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c));
+ *(__be64 *)&c.ip_hi = *(__be64 *)(lip->s6_addr);
+ *(__be64 *)&c.ip_lo = *(__be64 *)(lip->s6_addr + 8);
+ return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
+}
+
+static int cxgb4_clip_release(const struct net_device *dev,
+ const struct in6_addr *lip)
+{
+ struct adapter *adap;
+ struct fw_clip_cmd c;
+
+ adap = netdev2adap(dev);
+ memset(&c, 0, sizeof(c));
+ c.op_to_write = htonl(FW_CMD_OP(FW_CLIP_CMD) |
+ FW_CMD_REQUEST | FW_CMD_READ);
+ c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c));
+ *(__be64 *)&c.ip_hi = *(__be64 *)(lip->s6_addr);
+ *(__be64 *)&c.ip_lo = *(__be64 *)(lip->s6_addr + 8);
+ return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
+}
+
/**
* cxgb4_create_server - create an IP server
* @dev: the device
@@ -3878,6 +3916,169 @@ int cxgb4_unregister_uld(enum cxgb4_uld type)
}
EXPORT_SYMBOL(cxgb4_unregister_uld);
+/* Check if netdev on which event is occured belongs to us or not. Return
+ * suceess (1) if it belongs otherwise failure (0).
+ */
+static int cxgb4_netdev(struct net_device *netdev)
+{
+ struct adapter *adap;
+ int i;
+
+ mutex_lock(&uld_mutex);
+ list_for_each_entry(adap, &adapter_list, list_node)
+ for (i = 0; i < MAX_NPORTS; i++)
+ if (adap->port[i] == netdev) {
+ mutex_unlock(&uld_mutex);
+ return 1;
+ }
+ mutex_unlock(&uld_mutex);
+ return 0;
+}
+
+static int clip_add(struct net_device *event_dev, struct inet6_ifaddr *ifa,
+ unsigned long event)
+{
+ int ret = NOTIFY_DONE;
+
+ rcu_read_lock();
+ if (cxgb4_netdev(event_dev)) {
+ switch (event) {
+ case NETDEV_UP:
+ ret = cxgb4_clip_get(event_dev,
+ (const struct in6_addr *)ifa->addr.s6_addr);
+ if (ret < 0) {
+ rcu_read_unlock();
+ return ret;
+ }
+ ret = NOTIFY_OK;
+ break;
+ case NETDEV_DOWN:
+ cxgb4_clip_release(event_dev,
+ (const struct in6_addr *)ifa->addr.s6_addr);
+ ret = NOTIFY_OK;
+ break;
+ default:
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return ret;
+}
+
+static int cxgb4_inet6addr_handler(struct notifier_block *this,
+ unsigned long event, void *data)
+{
+ struct inet6_ifaddr *ifa = data;
+ struct net_device *event_dev;
+ int ret = NOTIFY_DONE;
+ int cnt;
+ struct bonding *bond = netdev_priv(ifa->idev->dev);
+ struct slave *slave;
+ struct pci_dev *first_pdev = NULL;
+
+ if (ifa->idev->dev->priv_flags & IFF_802_1Q_VLAN) {
+ event_dev = vlan_dev_real_dev(ifa->idev->dev);
+ ret = clip_add(event_dev, ifa, event);
+ } else if (ifa->idev->dev->flags & IFF_MASTER) {
+ /* It is possible that two different adapters are bonded in one
+ * bond. We need to find such different adapters and add clip
+ * in all of them only once.
+ */
+ read_lock(&bond->lock);
+ bond_for_each_slave(bond, slave, cnt) {
+ if (!first_pdev) {
+ ret = clip_add(slave->dev, ifa, event);
+ /* If clip_add is success then only initialize
+ * first_pdev since it means it is our device
+ */
+ if (ret == NOTIFY_OK)
+ first_pdev = to_pci_dev(
+ slave->dev->dev.parent);
+ } else if (first_pdev !=
+ to_pci_dev(slave->dev->dev.parent))
+ ret = clip_add(slave->dev, ifa, event);
+ }
+ read_unlock(&bond->lock);
+ } else
+ ret = clip_add(ifa->idev->dev, ifa, event);
+
+ return ret;
+}
+
+static struct notifier_block cxgb4_inet6addr_notifier = {
+ .notifier_call = cxgb4_inet6addr_handler
+};
+
+/* Retrieves IPv6 addresses from a root device (bond, vlan) associated with
+ * a physical device.
+ * The physical device reference is needed to send the actul CLIP command.
+ */
+static int update_dev_clip(struct net_device *root_dev, struct net_device *dev)
+{
+ struct inet6_dev *idev = NULL;
+ struct inet6_ifaddr *ifa;
+ int ret = 0;
+
+ idev = __in6_dev_get(root_dev);
+ if (!idev)
+ return ret;
+
+ read_lock_bh(&idev->lock);
+ list_for_each_entry(ifa, &idev->addr_list, if_list) {
+ ret = cxgb4_clip_get(dev,
+ (const struct in6_addr *)ifa->addr.s6_addr);
+ if (ret < 0)
+ break;
+ }
+ read_unlock_bh(&idev->lock);
+
+ return ret;
+}
+
+static int update_root_dev_clip(struct net_device *dev)
+{
+ struct net_device *root_dev = NULL;
+ int i, ret = 0;
+
+ /* First populate the real net device's IPv6 addresses */
+ ret = update_dev_clip(dev, dev);
+ if (ret)
+ return ret;
+
+ /* Parse all bond and vlan devices layered on top of the physical dev */
+ for (i = 0; i < VLAN_N_VID; i++) {
+ root_dev = __vlan_find_dev_deep(dev, htons(ETH_P_8021Q), i);
+ if (!root_dev)
+ continue;
+
+ ret = update_dev_clip(root_dev, dev);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+
+static void update_clip(const struct adapter *adap)
+{
+ int i;
+ struct net_device *dev;
+ int ret;
+
+ rcu_read_lock();
+
+ for (i = 0; i < MAX_NPORTS; i++) {
+ dev = adap->port[i];
+ ret = 0;
+
+ if (dev)
+ ret = update_root_dev_clip(dev);
+
+ if (ret < 0)
+ break;
+ }
+ rcu_read_unlock();
+}
+
/**
* cxgb_up - enable the adapter
* @adap: adapter being enabled
@@ -3923,6 +4124,7 @@ static int cxgb_up(struct adapter *adap)
t4_intr_enable(adap);
adap->flags |= FULL_INIT_DONE;
notify_ulds(adap, CXGB4_STATE_UP);
+ update_clip(adap);
out:
return err;
irq_err:
@@ -5939,11 +6141,15 @@ static int __init cxgb4_init_module(void)
ret = pci_register_driver(&cxgb4_driver);
if (ret < 0)
debugfs_remove(cxgb4_debugfs_root);
+
+ register_inet6addr_notifier(&cxgb4_inet6addr_notifier);
+
return ret;
}
static void __exit cxgb4_cleanup_module(void)
{
+ unregister_inet6addr_notifier(&cxgb4_inet6addr_notifier);
pci_unregister_driver(&cxgb4_driver);
debugfs_remove(cxgb4_debugfs_root); /* NULL ok */
flush_workqueue(workq);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index d1c755f..6f77ac4 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -616,6 +616,7 @@ enum fw_cmd_opcodes {
FW_RSS_IND_TBL_CMD = 0x20,
FW_RSS_GLB_CONFIG_CMD = 0x22,
FW_RSS_VI_CONFIG_CMD = 0x23,
+ FW_CLIP_CMD = 0x28,
FW_LASTC2E_CMD = 0x40,
FW_ERROR_CMD = 0x80,
FW_DEBUG_CMD = 0x81,
@@ -2062,6 +2063,28 @@ struct fw_rss_vi_config_cmd {
} u;
};
+struct fw_clip_cmd {
+ __be32 op_to_write;
+ __be32 alloc_to_len16;
+ __be64 ip_hi;
+ __be64 ip_lo;
+ __be32 r4[2];
+};
+
+#define S_FW_CLIP_CMD_ALLOC 31
+#define M_FW_CLIP_CMD_ALLOC 0x1
+#define V_FW_CLIP_CMD_ALLOC(x) ((x) << S_FW_CLIP_CMD_ALLOC)
+#define G_FW_CLIP_CMD_ALLOC(x) \
+ (((x) >> S_FW_CLIP_CMD_ALLOC) & M_FW_CLIP_CMD_ALLOC)
+#define F_FW_CLIP_CMD_ALLOC V_FW_CLIP_CMD_ALLOC(1U)
+
+#define S_FW_CLIP_CMD_FREE 30
+#define M_FW_CLIP_CMD_FREE 0x1
+#define V_FW_CLIP_CMD_FREE(x) ((x) << S_FW_CLIP_CMD_FREE)
+#define G_FW_CLIP_CMD_FREE(x) \
+ (((x) >> S_FW_CLIP_CMD_FREE) & M_FW_CLIP_CMD_FREE)
+#define F_FW_CLIP_CMD_FREE V_FW_CLIP_CMD_FREE(1U)
+
enum fw_error_type {
FW_ERROR_TYPE_EXCEPTION = 0x0,
FW_ERROR_TYPE_HWMODULE = 0x1,
--
1.8.0
--
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