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net: dsa: setup and teardown master device 

Add DSA helpers to setup and teardown a master net device wired to its
CPU port. This centralizes the dsa_ptr assignment.

This also makes the master ethtool helpers static at the same time.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-11-06 16:11:45 -05:00 committed by David S. Miller
parent f070464cf0
commit 17a22fcfc8
4 changed files with 51 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
net/dsa/dsa2.c
View File

@ -469,6 +469,23 @@ static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
} }
static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
{
struct dsa_port *cpu_dp = dst->cpu_dp;
struct net_device *master = cpu_dp->master;
/* DSA currently supports a single pair of CPU port and master device */
return dsa_master_setup(master, cpu_dp);
}
static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
{
struct dsa_port *cpu_dp = dst->cpu_dp;
struct net_device *master = cpu_dp->master;
return dsa_master_teardown(master);
}
static int dsa_dst_apply(struct dsa_switch_tree *dst) static int dsa_dst_apply(struct dsa_switch_tree *dst)
{ {
struct dsa_switch *ds; struct dsa_switch *ds;
@ -489,14 +506,7 @@ static int dsa_dst_apply(struct dsa_switch_tree *dst)
return err; return err;
} }
/* If we use a tagging format that doesn't have an ethertype err = dsa_tree_setup_master(dst);
* field, make sure that all packets from this point on get
* sent to the tag format's receive function.
*/
wmb();
dst->cpu_dp->master->dsa_ptr = dst->cpu_dp;
err = dsa_master_ethtool_setup(dst->cpu_dp->master);
if (err) if (err)
return err; return err;
@ -513,15 +523,7 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
if (!dst->applied) if (!dst->applied)
return; return;
dsa_master_ethtool_restore(dst->cpu_dp->master); dsa_tree_teardown_master(dst);
dst->cpu_dp->master->dsa_ptr = NULL;
/* If we used a tagging format that doesn't have an ethertype
* field, make sure that all packets from this point get sent
* without the tag and go through the regular receive path.
*/
wmb();
for (index = 0; index < DSA_MAX_SWITCHES; index++) { for (index = 0; index < DSA_MAX_SWITCHES; index++) {
ds = dst->ds[index]; ds = dst->ds[index];

4
net/dsa/dsa_priv.h
View File

@ -108,8 +108,8 @@ int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
const unsigned char *addr, u16 vid); const unsigned char *addr, u16 vid);
/* master.c */ /* master.c */
int dsa_master_ethtool_setup(struct net_device *dev); int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
void dsa_master_ethtool_restore(struct net_device *dev); void dsa_master_teardown(struct net_device *dev);
static inline struct net_device *dsa_master_find_slave(struct net_device *dev, static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
int device, int port) int device, int port)

20
net/dsa/legacy.c
View File

@ -593,15 +593,7 @@ static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
if (!configured) if (!configured)
return -EPROBE_DEFER; return -EPROBE_DEFER;
/* return dsa_master_setup(dst->cpu_dp->master, dst->cpu_dp);
* If we use a tagging format that doesn't have an ethertype
* field, make sure that all packets from this point on get
* sent to the tag format's receive function.
*/
wmb();
dev->dsa_ptr = dst->cpu_dp;
return dsa_master_ethtool_setup(dst->cpu_dp->master);
} }
static int dsa_probe(struct platform_device *pdev) static int dsa_probe(struct platform_device *pdev)
@ -666,15 +658,7 @@ static void dsa_remove_dst(struct dsa_switch_tree *dst)
{ {
int i; int i;
dsa_master_ethtool_restore(dst->cpu_dp->master); dsa_master_teardown(dst->cpu_dp->master);
dst->cpu_dp->master->dsa_ptr = NULL;
/* If we used a tagging format that doesn't have an ethertype
* field, make sure that all packets from this point get sent
* without the tag and go through the regular receive path.
*/
wmb();
for (i = 0; i < dst->pd->nr_chips; i++) { for (i = 0; i < dst->pd->nr_chips; i++) {
struct dsa_switch *ds = dst->ds[i]; struct dsa_switch *ds = dst->ds[i];

30
net/dsa/master.c
View File

@ -85,7 +85,7 @@ static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset,
} }
} }
int dsa_master_ethtool_setup(struct net_device *dev) static int dsa_master_ethtool_setup(struct net_device *dev)
{ {
struct dsa_port *cpu_dp = dev->dsa_ptr; struct dsa_port *cpu_dp = dev->dsa_ptr;
struct dsa_switch *ds = cpu_dp->ds; struct dsa_switch *ds = cpu_dp->ds;
@ -108,10 +108,36 @@ int dsa_master_ethtool_setup(struct net_device *dev)
return 0; return 0;
} }
void dsa_master_ethtool_restore(struct net_device *dev) static void dsa_master_ethtool_teardown(struct net_device *dev)
{ {
struct dsa_port *cpu_dp = dev->dsa_ptr; struct dsa_port *cpu_dp = dev->dsa_ptr;
dev->ethtool_ops = cpu_dp->orig_ethtool_ops; dev->ethtool_ops = cpu_dp->orig_ethtool_ops;
cpu_dp->orig_ethtool_ops = NULL; cpu_dp->orig_ethtool_ops = NULL;
} }
int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
{
/* If we use a tagging format that doesn't have an ethertype
* field, make sure that all packets from this point on get
* sent to the tag format's receive function.
*/
wmb();
dev->dsa_ptr = cpu_dp;
return dsa_master_ethtool_setup(dev);
}
void dsa_master_teardown(struct net_device *dev)
{
dsa_master_ethtool_teardown(dev);
dev->dsa_ptr = NULL;
/* If we used a tagging format that doesn't have an ethertype
* field, make sure that all packets from this point get sent
* without the tag and go through the regular receive path.
*/
wmb();
}