[PATCH v2 net-next v2 05/12] net: dsa: mv88e6xxx: add cap for MGMT Enables bits

From: Vivien Didelot
Date: Mon Jul 18 2016 - 14:47:32 EST

Some switches provide a Rsvd2CPU mechanism used to choose which of the
16 reserved multicast destination addresses matching 01:80:c2:00:00:0x
should be considered as MGMT and thus forwarded to the CPU port.

Other switches extend this mechanism to also configure as MGMT the
additional 16 reserved multicast addresses matching 01:80:c2:00:00:2x.

This mechanism is exposed via two registers in Global 2, and an Rsvd2CPU
enable bit in the management register.

Newer chip (such as 88E6390) has replaced these registers with a new
indirect MGMT mechanism in Global 1.

The patch adds two MV88E6XXX_FLAG_G2_MGMT_EN_{0,2}X flags to describe
the presence of these Global 2 registers. If 88E6390 support is added, a
MV88E6XXX_FLAG_G1_MGMT_CTRL flag will be needed to setup Rsvd2CPU.

Note: all switches still support in parallel the ATU Load operation with
an MGMT Entry State to forward such frames in a less convenient way.

net: dsa: mv88e6xxx: add cap for MGMT Enable 2x
Signed-off-by: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx>
---
drivers/net/dsa/mv88e6xxx/chip.c | 43 ++++++++++++++++++++---------------
drivers/net/dsa/mv88e6xxx/mv88e6xxx.h | 16 +++++++++++++
2 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 5a4a1b7..8199998 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3199,25 +3199,40 @@ static int mv88e6xxx_g2_clear_trunk(struct mv88e6xxx_chip *chip)

static int mv88e6xxx_g2_setup(struct mv88e6xxx_chip *chip)
{
+ u16 reg;
int err;
int i;

- /* Send all frames with destination addresses matching
- * 01:80:c2:00:00:0x to the CPU port.
- */
- err = _mv88e6xxx_reg_write(chip, REG_GLOBAL2, GLOBAL2_MGMT_EN_0X,
- 0xffff);
- if (err)
- return err;
+ if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_2X)) {
+ /* Consider the frames with reserved multicast destination
+ * addresses matching 01:80:c2:00:00:2x as MGMT.
+ */
+ err = mv88e6xxx_write(chip, REG_GLOBAL2, GLOBAL2_MGMT_EN_2X,
+ 0xffff);
+ if (err)
+ return err;
+ }
+
+ if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_0X)) {
+ /* Consider the frames with reserved multicast destination
+ * addresses matching 01:80:c2:00:00:0x as MGMT.
+ */
+ err = mv88e6xxx_write(chip, REG_GLOBAL2, GLOBAL2_MGMT_EN_0X,
+ 0xffff);
+ if (err)
+ return err;
+ }

/* Ignore removed tag data on doubly tagged packets, disable
* flow control messages, force flow control priority to the
* highest, and send all special multicast frames to the CPU
* port at the highest priority.
*/
- err = _mv88e6xxx_reg_write(chip, REG_GLOBAL2, GLOBAL2_SWITCH_MGMT,
- 0x7 | GLOBAL2_SWITCH_MGMT_RSVD2CPU | 0x70 |
- GLOBAL2_SWITCH_MGMT_FORCE_FLOW_CTRL_PRI);
+ reg = GLOBAL2_SWITCH_MGMT_FORCE_FLOW_CTRL_PRI | (0x7 << 4);
+ if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_0X) ||
+ mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_2X))
+ reg |= GLOBAL2_SWITCH_MGMT_RSVD2CPU | 0x7;
+ err = mv88e6xxx_write(chip, REG_GLOBAL2, GLOBAL2_SWITCH_MGMT, reg);
if (err)
return err;

@@ -3234,14 +3249,6 @@ static int mv88e6xxx_g2_setup(struct mv88e6xxx_chip *chip)
if (mv88e6xxx_6352_family(chip) || mv88e6xxx_6351_family(chip) ||
mv88e6xxx_6165_family(chip) || mv88e6xxx_6097_family(chip) ||
mv88e6xxx_6320_family(chip)) {
- /* Send all frames with destination addresses matching
- * 01:80:c2:00:00:2x to the CPU port.
- */
- err = _mv88e6xxx_reg_write(chip, REG_GLOBAL2,
- GLOBAL2_MGMT_EN_2X, 0xffff);
- if (err)
- return err;
-
/* Initialise cross-chip port VLAN table to reset
* defaults.
*/
diff --git a/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
index 876d9ea..d13b0b5 100644
--- a/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
@@ -388,6 +388,8 @@ enum mv88e6xxx_cap {
* The device contains a second set of global 16-bit registers.
*/
MV88E6XXX_CAP_GLOBAL2,
+ MV88E6XXX_CAP_G2_MGMT_EN_2X, /* (0x02) MGMT Enable Register 2x */
+ MV88E6XXX_CAP_G2_MGMT_EN_0X, /* (0x03) MGMT Enable Register 0x */

/* Multi-chip Addressing Mode.
* Some chips require an indirect SMI access when their SMI device
@@ -436,6 +438,8 @@ enum mv88e6xxx_cap {
#define MV88E6XXX_FLAG_EEE BIT(MV88E6XXX_CAP_EEE)
#define MV88E6XXX_FLAG_EEPROM BIT(MV88E6XXX_CAP_EEPROM)
#define MV88E6XXX_FLAG_GLOBAL2 BIT(MV88E6XXX_CAP_GLOBAL2)
+#define MV88E6XXX_FLAG_G2_MGMT_EN_2X BIT(MV88E6XXX_CAP_G2_MGMT_EN_2X)
+#define MV88E6XXX_FLAG_G2_MGMT_EN_0X BIT(MV88E6XXX_CAP_G2_MGMT_EN_0X)
#define MV88E6XXX_FLAG_MULTI_CHIP BIT(MV88E6XXX_CAP_MULTI_CHIP)
#define MV88E6XXX_FLAG_PPU BIT(MV88E6XXX_CAP_PPU)
#define MV88E6XXX_FLAG_PPU_ACTIVE BIT(MV88E6XXX_CAP_PPU_ACTIVE)
@@ -448,12 +452,15 @@ enum mv88e6xxx_cap {

#define MV88E6XXX_FLAGS_FAMILY_6095 \
(MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU | \
MV88E6XXX_FLAG_VTU)

#define MV88E6XXX_FLAGS_FAMILY_6097 \
(MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_2X | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU | \
MV88E6XXX_FLAG_STU | \
@@ -461,6 +468,8 @@ enum mv88e6xxx_cap {

#define MV88E6XXX_FLAGS_FAMILY_6165 \
(MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_2X | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_STU | \
MV88E6XXX_FLAG_SWITCH_MAC | \
@@ -469,6 +478,7 @@ enum mv88e6xxx_cap {

#define MV88E6XXX_FLAGS_FAMILY_6185 \
(MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU | \
MV88E6XXX_FLAG_VTU)
@@ -477,6 +487,8 @@ enum mv88e6xxx_cap {
(MV88E6XXX_FLAG_EEE | \
MV88E6XXX_FLAG_EEPROM | \
MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_2X | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU_ACTIVE | \
MV88E6XXX_FLAG_SMI_PHY | \
@@ -487,6 +499,8 @@ enum mv88e6xxx_cap {

#define MV88E6XXX_FLAGS_FAMILY_6351 \
(MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_2X | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU_ACTIVE | \
MV88E6XXX_FLAG_SMI_PHY | \
@@ -499,6 +513,8 @@ enum mv88e6xxx_cap {
(MV88E6XXX_FLAG_EEE | \
MV88E6XXX_FLAG_EEPROM | \
MV88E6XXX_FLAG_GLOBAL2 | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_2X | \
+ MV88E6XXX_FLAG_G2_MGMT_EN_0X | \
MV88E6XXX_FLAG_MULTI_CHIP | \
MV88E6XXX_FLAG_PPU_ACTIVE | \
MV88E6XXX_FLAG_SMI_PHY | \
--
2.9.0