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Date: Tue, 13 Jan 2015 11:58:10 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Kamil Krawczyk <kamil.krawczyk@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next v2 12/15] i40e: Adding function for reading PBA String
From: Kamil Krawczyk <kamil.krawczyk@...el.com>
Function will read PBA Block from Shadow RAM and return it in a string format.
Change-ID: I4ee7059f6e21bd0eba38687da15e772e0b4ab36e
Signed-off-by: Kamil Krawczyk <kamil.krawczyk@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e_common.c | 59 ++++++++++++++++++++++++
drivers/net/ethernet/intel/i40e/i40e_prototype.h | 2 +
drivers/net/ethernet/intel/i40e/i40e_type.h | 2 +
3 files changed, 63 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index b16fc03..4f4d9d1 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -742,6 +742,65 @@ i40e_status i40e_get_san_mac_addr(struct i40e_hw *hw, u8 *mac_addr)
#endif
/**
+ * i40e_read_pba_string - Reads part number string from EEPROM
+ * @hw: pointer to hardware structure
+ * @pba_num: stores the part number string from the EEPROM
+ * @pba_num_size: part number string buffer length
+ *
+ * Reads the part number string from the EEPROM.
+ **/
+i40e_status i40e_read_pba_string(struct i40e_hw *hw, u8 *pba_num,
+ u32 pba_num_size)
+{
+ i40e_status status = 0;
+ u16 pba_word = 0;
+ u16 pba_size = 0;
+ u16 pba_ptr = 0;
+ u16 i = 0;
+
+ status = i40e_read_nvm_word(hw, I40E_SR_PBA_FLAGS, &pba_word);
+ if (status || (pba_word != 0xFAFA)) {
+ hw_dbg(hw, "Failed to read PBA flags or flag is invalid.\n");
+ return status;
+ }
+
+ status = i40e_read_nvm_word(hw, I40E_SR_PBA_BLOCK_PTR, &pba_ptr);
+ if (status) {
+ hw_dbg(hw, "Failed to read PBA Block pointer.\n");
+ return status;
+ }
+
+ status = i40e_read_nvm_word(hw, pba_ptr, &pba_size);
+ if (status) {
+ hw_dbg(hw, "Failed to read PBA Block size.\n");
+ return status;
+ }
+
+ /* Subtract one to get PBA word count (PBA Size word is included in
+ * total size)
+ */
+ pba_size--;
+ if (pba_num_size < (((u32)pba_size * 2) + 1)) {
+ hw_dbg(hw, "Buffer to small for PBA data.\n");
+ return I40E_ERR_PARAM;
+ }
+
+ for (i = 0; i < pba_size; i++) {
+ status = i40e_read_nvm_word(hw, (pba_ptr + 1) + i, &pba_word);
+ if (status) {
+ hw_dbg(hw, "Failed to read PBA Block word %d.\n", i);
+ return status;
+ }
+
+ pba_num[(i * 2)] = (pba_word >> 8) & 0xFF;
+ pba_num[(i * 2) + 1] = pba_word & 0xFF;
+ }
+ pba_num[(pba_size * 2)] = '\0';
+
+ return status;
+}
+
+/**
* i40e_get_media_type - Gets media type
* @hw: pointer to the hardware structure
**/
diff --git a/drivers/net/ethernet/intel/i40e/i40e_prototype.h b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
index d1c7d63..68e852a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_prototype.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
@@ -248,6 +248,8 @@ void i40e_clear_pxe_mode(struct i40e_hw *hw);
bool i40e_get_link_status(struct i40e_hw *hw);
i40e_status i40e_get_mac_addr(struct i40e_hw *hw, u8 *mac_addr);
i40e_status i40e_get_port_mac_addr(struct i40e_hw *hw, u8 *mac_addr);
+i40e_status i40e_read_pba_string(struct i40e_hw *hw, u8 *pba_num,
+ u32 pba_num_size);
i40e_status i40e_validate_mac_addr(u8 *mac_addr);
void i40e_pre_tx_queue_cfg(struct i40e_hw *hw, u32 queue, bool enable);
#ifdef I40E_FCOE
diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
index 611de3e..ff121fe 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
@@ -1140,6 +1140,8 @@ struct i40e_hw_port_stats {
/* Checksum and Shadow RAM pointers */
#define I40E_SR_NVM_CONTROL_WORD 0x00
#define I40E_SR_EMP_MODULE_PTR 0x0F
+#define I40E_SR_PBA_FLAGS 0x15
+#define I40E_SR_PBA_BLOCK_PTR 0x16
#define I40E_SR_NVM_IMAGE_VERSION 0x18
#define I40E_SR_NVM_WAKE_ON_LAN 0x19
#define I40E_SR_ALTERNATE_SAN_MAC_ADDRESS_PTR 0x27
--
1.9.3
--
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