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Subject[PATCH net-next v2 4/6] net: dsa: mv88e6xxx: support 256 databases
Date
The 6185 family of devices has only 256 address databases. Their 8-bit
FID for ATU and VTU operations are split into ATU Control and ATU/VTU
Operation registers.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
drivers/net/dsa/mv88e6xxx.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 888c66b..52c3e17 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1003,6 +1003,20 @@ static int _mv88e6xxx_atu_cmd(struct dsa_switch *ds, u16 fid, u16 cmd)
ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_ATU_FID, fid);
if (ret < 0)
return ret;
+ } else if (mv88e6xxx_num_databases(ds) == 256) {
+ /* ATU DBNum[7:4] are located in ATU Control 15:12 */
+ ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_ATU_CONTROL);
+ if (ret < 0)
+ return ret;
+
+ ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_ATU_CONTROL,
+ (ret & 0xfff) |
+ ((fid << 8) & 0xf000));
+ if (ret < 0)
+ return ret;
+
+ /* ATU DBNum[3:0] are located in ATU Operation 3:0 */
+ cmd |= fid & 0xf;
}

ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_ATU_OP, cmd);
@@ -1373,6 +1387,17 @@ static int _mv88e6xxx_vtu_getnext(struct dsa_switch *ds,
return ret;

next.fid = ret & GLOBAL_VTU_FID_MASK;
+ } else if (mv88e6xxx_num_databases(ds) == 256) {
+ /* VTU DBNum[7:4] are located in VTU Operation 11:8, and
+ * VTU DBNum[3:0] are located in VTU Operation 3:0
+ */
+ ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL,
+ GLOBAL_VTU_OP);
+ if (ret < 0)
+ return ret;
+
+ next.fid = (ret & 0xf00) >> 4;
+ next.fid |= ret & 0xf;
}

if (mv88e6xxx_has_stu(ds)) {
@@ -1443,6 +1468,7 @@ unlock:
static int _mv88e6xxx_vtu_loadpurge(struct dsa_switch *ds,
struct mv88e6xxx_vtu_stu_entry *entry)
{
+ u16 op = GLOBAL_VTU_OP_VTU_LOAD_PURGE;
u16 reg = 0;
int ret;

@@ -1470,6 +1496,12 @@ static int _mv88e6xxx_vtu_loadpurge(struct dsa_switch *ds,
ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_FID, reg);
if (ret < 0)
return ret;
+ } else if (mv88e6xxx_num_databases(ds) == 256) {
+ /* VTU DBNum[7:4] are located in VTU Operation 11:8, and
+ * VTU DBNum[3:0] are located in VTU Operation 3:0
+ */
+ op |= (entry->fid & 0xf0) << 8;
+ op |= entry->fid & 0xf;
}

reg = GLOBAL_VTU_VID_VALID;
@@ -1479,7 +1511,7 @@ loadpurge:
if (ret < 0)
return ret;

- return _mv88e6xxx_vtu_cmd(ds, GLOBAL_VTU_OP_VTU_LOAD_PURGE);
+ return _mv88e6xxx_vtu_cmd(ds, op);
}

static int _mv88e6xxx_stu_getnext(struct dsa_switch *ds, u8 sid,
@@ -1564,6 +1596,8 @@ static int _mv88e6xxx_port_fid(struct dsa_switch *ds, int port, u16 *new,

if (mv88e6xxx_num_databases(ds) == 4096)
upper_mask = 0xff;
+ else if (mv88e6xxx_num_databases(ds) == 256)
+ upper_mask = 0xf;
else
return -EOPNOTSUPP;

--
2.7.4
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