[PATCH 1/7] dsa: marvell: Provide per device information about max frame size

From: Lukasz Majewski
Date: Thu Mar 09 2023 - 07:55:28 EST

Different Marvell DSA switches support different size of max frame
bytes to be sent. This value corresponds to the memory allocated
in switch to store single frame.

For example mv88e6185 supports max 1632 bytes, which is now in-driver
standard value. On the other hand - mv88e6250 supports 2048 bytes.
To be more interesting - devices supporting jumbo frames - use yet
another value (10240 bytes)

As this value is internal and may be different for each switch IC,
new entry in struct mv88e6xxx_info has been added to store it.

This commit doesn't change the code functionality - it just provides
the max frame size value explicitly - up till now it has been
assigned depending on the callback provided by the switch driver
(e.g. .set_max_frame_size, .port_set_jumbo_size).

Signed-off-by: Lukasz Majewski <lukma@xxxxxxx>

---
Changes for v2:
- Define max_frame_size with default value of 1632 bytes,
- Set proper value for the mv88e6250 switch SoC (linkstreet) family

Changes for v3:
- Add default value for 1632B of the max frame size (to avoid problems
with not defined values)

Changes for v4:
- Rework the mv88e6xxx_get_max_mtu() by using per device defined
max_frame_size value

- Add WARN_ON_ONCE() when max_frame_size is not defined

- Add description for the new 'max_frame_size' member of mv88e6xxx_info

Changes for v5:
- Move some code fragments (like get_mtu callback changes) to separate
patches
---
drivers/net/dsa/mv88e6xxx/chip.c | 31 +++++++++++++++++++++++++++++++
drivers/net/dsa/mv88e6xxx/chip.h | 6 ++++++
2 files changed, 37 insertions(+)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 0a5d6c7bb128..c097a0b19ba6 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5626,6 +5626,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5648,6 +5649,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_ports = 11,
.num_internal_phys = 0,
.max_vid = 4095,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5669,6 +5671,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 8,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5693,6 +5696,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5716,6 +5720,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_ports = 8,
.num_internal_phys = 0,
.max_vid = 4095,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5738,6 +5743,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 11,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x10,
.global1_addr = 0x1b,
@@ -5762,6 +5768,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5787,6 +5794,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 0,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5811,6 +5819,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5836,6 +5845,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 15,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5860,6 +5870,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5885,6 +5896,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 15,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5908,6 +5920,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_ports = 10,
.num_internal_phys = 0,
.max_vid = 4095,
+ .max_frame_size = 1632,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5931,6 +5944,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 16,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5955,6 +5969,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 16,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -5978,6 +5993,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 9,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6001,6 +6017,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 9,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6024,6 +6041,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 9,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6051,6 +6069,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 2,
.invalid_port_mask = BIT(2) | BIT(3) | BIT(4),
.max_vid = 4095,
+ .max_frame_size = 2048,
.port_base_addr = 0x08,
.phy_base_addr = 0x00,
.global1_addr = 0x0f,
@@ -6075,6 +6094,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 15,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6098,6 +6118,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_ports = 7,
.num_internal_phys = 5,
.max_vid = 4095,
+ .max_frame_size = 2048,
.port_base_addr = 0x08,
.phy_base_addr = 0x00,
.global1_addr = 0x0f,
@@ -6121,6 +6142,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 16,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 1522,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6145,6 +6167,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.num_gpio = 15,
.max_vid = 4095,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6170,6 +6193,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.num_gpio = 15,
.max_vid = 4095,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6195,6 +6219,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 11,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x10,
.global1_addr = 0x1b,
@@ -6220,6 +6245,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6244,6 +6270,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 5,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6269,6 +6296,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 15,
.max_vid = 4095,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x10,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6294,6 +6322,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 16,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6319,6 +6348,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_gpio = 16,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
@@ -6343,6 +6373,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
.num_internal_phys = 9,
.max_vid = 8191,
.max_sid = 63,
+ .max_frame_size = 10240,
.port_base_addr = 0x0,
.phy_base_addr = 0x0,
.global1_addr = 0x1b,
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index da6e1339f809..e2b88f1f8376 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -132,6 +132,12 @@ struct mv88e6xxx_info {
unsigned int num_gpio;
unsigned int max_vid;
unsigned int max_sid;
+
+ /* Max Frame Size.
+ * This value corresponds to the memory allocated in switch internal
+ * memory to store single frame.
+ */
+ unsigned int max_frame_size;
unsigned int port_base_addr;
unsigned int phy_base_addr;
unsigned int global1_addr;
--
2.20.1