[dpdk-dev] [PATCH] net/ice: fix incorrect EEPROM data

[Shougang Wang <shougangx.wang@intel.com>]

Kernel driver reads EEPROM data from flash but DPDK reads from
shadow ram. This patch fixes the issue by changing method to get
EEPROM data from flash.

Fixes: 68a1ab82ad74 ("net/ice: speed up to retrieve EEPROM")
Cc: stable@dpdk.org

Signed-off-by: Shougang Wang <shougangx.wang@intel.com>
---
 drivers/net/ice/base/ice_nvm.c |  4 ++--
 drivers/net/ice/base/ice_nvm.h |  3 +++
 drivers/net/ice/ice_ethdev.c   | 26 +++++++++++---------------
 3 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ice/base/ice_nvm.c b/drivers/net/ice/base/ice_nvm.c
index 1bbd6e209..a5f9f8fe6 100644
--- a/drivers/net/ice/base/ice_nvm.c
+++ b/drivers/net/ice/base/ice_nvm.c
@@ -186,7 +186,7 @@ ice_read_sr_buf_aq(struct ice_hw *hw, u16 offset, u16 *words, u16 *data)
  *
  * This function will request NVM ownership.
  */
-static enum ice_status
+enum ice_status
 ice_acquire_nvm(struct ice_hw *hw, enum ice_aq_res_access_type access)
 {
 	ice_debug(hw, ICE_DBG_TRACE, "%s\n", __func__);
@@ -203,7 +203,7 @@ ice_acquire_nvm(struct ice_hw *hw, enum ice_aq_res_access_type access)
  *
  * This function will release NVM ownership.
  */
-static void ice_release_nvm(struct ice_hw *hw)
+void ice_release_nvm(struct ice_hw *hw)
 {
 	ice_debug(hw, ICE_DBG_TRACE, "%s\n", __func__);
 
diff --git a/drivers/net/ice/base/ice_nvm.h b/drivers/net/ice/base/ice_nvm.h
index e5f8888e3..075e7a59f 100644
--- a/drivers/net/ice/base/ice_nvm.h
+++ b/drivers/net/ice/base/ice_nvm.h
@@ -85,6 +85,9 @@ enum ice_status
 ice_handle_nvm_access(struct ice_hw *hw, struct ice_nvm_access_cmd *cmd,
 		      union ice_nvm_access_data *data);
 enum ice_status
+ice_acquire_nvm(struct ice_hw *hw, enum ice_aq_res_access_type access);
+void ice_release_nvm(struct ice_hw *hw);
+enum ice_status
 ice_read_flat_nvm(struct ice_hw *hw, u32 offset, u32 *length, u8 *data,
 		  bool read_shadow_ram);
 enum ice_status
diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index d5110c439..3d8118e37 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -3951,8 +3951,7 @@ ice_get_eeprom_length(struct rte_eth_dev *dev)
 {
 	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
-	/* Convert word count to byte count */
-	return hw->nvm.sr_words << 1;
+	return hw->nvm.flash_size;
 }
 
 static int
@@ -3960,26 +3959,23 @@ ice_get_eeprom(struct rte_eth_dev *dev,
 	       struct rte_dev_eeprom_info *eeprom)
 {
 	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	uint16_t *data = eeprom->data;
-	uint16_t first_word, last_word, nwords;
+	uint8_t *data = eeprom->data;
 	enum ice_status status = ICE_SUCCESS;
+	eeprom->magic = hw->vendor_id | (hw->device_id << 16);
 
-	first_word = eeprom->offset >> 1;
-	last_word = (eeprom->offset + eeprom->length - 1) >> 1;
-	nwords = last_word - first_word + 1;
-
-	if (first_word >= hw->nvm.sr_words ||
-	    last_word >= hw->nvm.sr_words) {
-		PMD_DRV_LOG(ERR, "Requested EEPROM bytes out of range.");
-		return -EINVAL;
+	status = ice_acquire_nvm(hw, ICE_RES_READ);
+	if (status) {
+		PMD_DRV_LOG(ERR, "acquire nvm failed.");
+		return -EIO;
 	}
 
-	eeprom->magic = hw->vendor_id | (hw->device_id << 16);
+	status = ice_read_flat_nvm(hw, eeprom->offset, &eeprom->length,
+			data, false);
+
+	ice_release_nvm(hw);
 
-	status = ice_read_sr_buf(hw, first_word, &nwords, data);
 	if (status) {
 		PMD_DRV_LOG(ERR, "EEPROM read failed.");
-		eeprom->length = sizeof(uint16_t) * nwords;
 		return -EIO;
 	}
 
-- 
2.17.1