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Message-Id: <20170501180527.11756-9-vivien.didelot@savoirfairelinux.com>
Date: Mon, 1 May 2017 14:05:17 -0400
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
"David S. Miller" <davem@...emloft.net>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next v2 08/18] net: dsa: mv88e6xxx: move generic VTU GetNext
Even though every switch model has a different way to access the VTU
Data bits, the base implementation of the VTU GetNext operation remains
the same: wait, write the first VID to iterate from, start the
operation, and read the next VID.
Move this generic implementation into global1_vtu.c and abstract the
handling of the start VID (similarly to the ATU GetNext implementation),
before introducing a new chip operation for specific chips.
Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
drivers/net/dsa/mv88e6xxx/chip.c | 31 ++-----------------------------
drivers/net/dsa/mv88e6xxx/global1.h | 2 ++
drivers/net/dsa/mv88e6xxx/global1_vtu.c | 29 +++++++++++++++++++++++++++++
3 files changed, 33 insertions(+), 29 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index dce490e78347..70b420e134ce 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1340,19 +1340,11 @@ static int mv88e6xxx_stu_data_write(struct mv88e6xxx_chip *chip,
static int _mv88e6xxx_vtu_getnext(struct mv88e6xxx_chip *chip,
struct mv88e6xxx_vtu_entry *entry)
{
- struct mv88e6xxx_vtu_entry next = { 0 };
+ struct mv88e6xxx_vtu_entry next = *entry;
u16 val;
int err;
- err = mv88e6xxx_g1_vtu_op_wait(chip);
- if (err)
- return err;
-
- err = mv88e6xxx_g1_vtu_op(chip, GLOBAL_VTU_OP_VTU_GET_NEXT);
- if (err)
- return err;
-
- err = mv88e6xxx_g1_vtu_vid_read(chip, &next);
+ err = mv88e6xxx_g1_vtu_getnext(chip, &next);
if (err)
return err;
@@ -1416,10 +1408,6 @@ static int mv88e6xxx_port_vlan_dump(struct dsa_switch *ds, int port,
if (err)
goto unlock;
- err = mv88e6xxx_g1_vtu_vid_write(chip, &next);
- if (err)
- goto unlock;
-
do {
err = _mv88e6xxx_vtu_getnext(chip, &next);
if (err)
@@ -1582,10 +1570,6 @@ static int mv88e6xxx_atu_new(struct mv88e6xxx_chip *chip, u16 *fid)
}
/* Set every FID bit used by the VLAN entries */
- err = mv88e6xxx_g1_vtu_vid_write(chip, &vlan);
- if (err)
- return err;
-
do {
err = _mv88e6xxx_vtu_getnext(chip, &vlan);
if (err)
@@ -1668,9 +1652,6 @@ static int _mv88e6xxx_vtu_get(struct mv88e6xxx_chip *chip, u16 vid,
entry->vid = vid - 1;
entry->valid = false;
- err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
- if (err)
- return err;
err = _mv88e6xxx_vtu_getnext(chip, entry);
if (err)
@@ -1703,10 +1684,6 @@ static int mv88e6xxx_port_check_hw_vlan(struct dsa_switch *ds, int port,
mutex_lock(&chip->reg_lock);
- err = mv88e6xxx_g1_vtu_vid_write(chip, &vlan);
- if (err)
- goto unlock;
-
do {
err = _mv88e6xxx_vtu_getnext(chip, &vlan);
if (err)
@@ -2065,10 +2042,6 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port,
return err;
/* Dump VLANs' Filtering Information Databases */
- err = mv88e6xxx_g1_vtu_vid_write(chip, &vlan);
- if (err)
- return err;
-
do {
err = _mv88e6xxx_vtu_getnext(chip, &vlan);
if (err)
diff --git a/drivers/net/dsa/mv88e6xxx/global1.h b/drivers/net/dsa/mv88e6xxx/global1.h
index 22fe22bd82cd..66216848fc0d 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.h
+++ b/drivers/net/dsa/mv88e6xxx/global1.h
@@ -64,6 +64,8 @@ int mv88e6xxx_g1_vtu_vid_write(struct mv88e6xxx_chip *chip,
struct mv88e6xxx_vtu_entry *entry);
int mv88e6xxx_g1_vtu_op_wait(struct mv88e6xxx_chip *chip);
int mv88e6xxx_g1_vtu_op(struct mv88e6xxx_chip *chip, u16 op);
+int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
+ struct mv88e6xxx_vtu_entry *entry);
int mv88e6xxx_g1_vtu_flush(struct mv88e6xxx_chip *chip);
#endif /* _MV88E6XXX_GLOBAL1_H */
diff --git a/drivers/net/dsa/mv88e6xxx/global1_vtu.c b/drivers/net/dsa/mv88e6xxx/global1_vtu.c
index 6ac3d0eeae6b..c3f55be873b3 100644
--- a/drivers/net/dsa/mv88e6xxx/global1_vtu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_vtu.c
@@ -113,6 +113,35 @@ int mv88e6xxx_g1_vtu_vid_write(struct mv88e6xxx_chip *chip,
/* VLAN Translation Unit Operations */
+int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
+ struct mv88e6xxx_vtu_entry *entry)
+{
+ int err;
+
+ err = mv88e6xxx_g1_vtu_op_wait(chip);
+ if (err)
+ return err;
+
+ /* To get the next higher active VID, the VTU GetNext operation can be
+ * started again without setting the VID registers since it already
+ * contains the last VID.
+ *
+ * To save a few hardware accesses and abstract this to the caller,
+ * write the VID only once, when the entry is given as invalid.
+ */
+ if (!entry->valid) {
+ err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
+ if (err)
+ return err;
+ }
+
+ err = mv88e6xxx_g1_vtu_op(chip, GLOBAL_VTU_OP_VTU_GET_NEXT);
+ if (err)
+ return err;
+
+ return mv88e6xxx_g1_vtu_vid_read(chip, entry);
+}
+
int mv88e6xxx_g1_vtu_flush(struct mv88e6xxx_chip *chip)
{
int err;
--
2.12.2
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