netdev - [PATCH net-next 1/2] mlxsw: reg: Add macro for getting QSFP module EEPROM page number

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Date:   Mon, 21 Oct 2019 13:30:30 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, vadimp@...lanox.com,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 1/2] mlxsw: reg: Add macro for getting QSFP module EEPROM page number

From: Vadim Pasternak <vadimp@...lanox.com>

Provide a macro for getting QSFP module EEPROM page number from the
optional upper page number row offset, specified in request.

Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index f5e39758c6ac..adb63a266fc7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -8412,6 +8412,7 @@ MLXSW_ITEM32(reg, mcia, device_address, 0x04, 0, 16);
 MLXSW_ITEM32(reg, mcia, size, 0x08, 0, 16);
 
 #define MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH	256
+#define MLXSW_REG_MCIA_EEPROM_UP_PAGE_LENGTH	128
 #define MLXSW_REG_MCIA_EEPROM_SIZE		48
 #define MLXSW_REG_MCIA_I2C_ADDR_LOW		0x50
 #define MLXSW_REG_MCIA_I2C_ADDR_HIGH		0x51
@@ -8447,6 +8448,14 @@ enum mlxsw_reg_mcia_eeprom_module_info {
  */
 MLXSW_ITEM_BUF(reg, mcia, eeprom, 0x10, MLXSW_REG_MCIA_EEPROM_SIZE);
 
+/* This is used to access the optional upper pages (1-3) in the QSFP+
+ * memory map. Page 1 is available on offset 256 through 383, page 2 -
+ * on offset 384 through 511, page 3 - on offset 512 through 639.
+ */
+#define MLXSW_REG_MCIA_PAGE_GET(off) (((off) - \
+				MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH) / \
+				MLXSW_REG_MCIA_EEPROM_UP_PAGE_LENGTH + 1)
+
 static inline void mlxsw_reg_mcia_pack(char *payload, u8 module, u8 lock,
 				       u8 page_number, u16 device_addr,
 				       u8 size, u8 i2c_device_addr)
-- 
2.21.0