i40e: Add support for OEM firmware version

This patch adds support for OEM firmware version. If OEM specific
adapter is detected ethtool reports OEM product version in firmware
version string instead of etrack id.
Signed-off-by: Filip Sadowski <filip.sadowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e.h

@@ -103,6 +103,12 @@
 	(I40E_AQ_PHY_DEBUG_DISABLE_LINK_FW | \
 	I40E_AQ_PHY_DEBUG_DISABLE_ALL_LINK_FW)
 
+#define I40E_OEM_EETRACK_ID		0xffffffff
+#define I40E_OEM_GEN_SHIFT		24
+#define I40E_OEM_SNAP_MASK		0x00ff0000
+#define I40E_OEM_SNAP_SHIFT		16
+#define I40E_OEM_RELEASE_MASK		0x0000ffff
+
 /* The values in here are decimal coded as hex as is the case in the NVM map*/
 #define I40E_CURRENT_NVM_VERSION_HI	0x2
 #define I40E_CURRENT_NVM_VERSION_LO	0x40
@@ -734,10 +740,23 @@ static inline char *i40e_nvm_version_str(struct i40e_hw *hw)
 {
 	static char buf[32];
 	u32 full_ver;
+
+	full_ver = hw->nvm.oem_ver;
+
+	if (hw->nvm.eetrack == I40E_OEM_EETRACK_ID) {
+		u8 gen, snap;
+		u16 release;
+
+		gen = (u8)(full_ver >> I40E_OEM_GEN_SHIFT);
+		snap = (u8)((full_ver & I40E_OEM_SNAP_MASK) >>
+			I40E_OEM_SNAP_SHIFT);
+		release = (u16)(full_ver & I40E_OEM_RELEASE_MASK);
+
+		snprintf(buf, sizeof(buf), "%x.%x.%x", gen, snap, release);
+	} else {
 		u8 ver, patch;
 		u16 build;
 
-	full_ver = hw->nvm.oem_ver;
 		ver = (u8)(full_ver >> I40E_OEM_VER_SHIFT);
 		build = (u16)((full_ver >> I40E_OEM_VER_BUILD_SHIFT) &
 			 I40E_OEM_VER_BUILD_MASK);
@@ -750,6 +769,7 @@ static inline char *i40e_nvm_version_str(struct i40e_hw *hw)
 			 (hw->nvm.version & I40E_NVM_VERSION_LO_MASK) >>
 				I40E_NVM_VERSION_LO_SHIFT,
 			 hw->nvm.eetrack, ver, build, patch);
+	}
 
 	return buf;
 }

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -7107,6 +7107,51 @@ static void i40e_send_version(struct i40e_pf *pf)
 	i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
 }
 
+/**
+ * i40e_get_oem_version - get OEM specific version information
+ * @hw: pointer to the hardware structure
+ **/
+static void i40e_get_oem_version(struct i40e_hw *hw)
+{
+	u16 block_offset = 0xffff;
+	u16 block_length = 0;
+	u16 capabilities = 0;
+	u16 gen_snap = 0;
+	u16 release = 0;
+
+#define I40E_SR_NVM_OEM_VERSION_PTR		0x1B
+#define I40E_NVM_OEM_LENGTH_OFFSET		0x00
+#define I40E_NVM_OEM_CAPABILITIES_OFFSET	0x01
+#define I40E_NVM_OEM_GEN_OFFSET			0x02
+#define I40E_NVM_OEM_RELEASE_OFFSET		0x03
+#define I40E_NVM_OEM_CAPABILITIES_MASK		0x000F
+#define I40E_NVM_OEM_LENGTH			3
+
+	/* Check if pointer to OEM version block is valid. */
+	i40e_read_nvm_word(hw, I40E_SR_NVM_OEM_VERSION_PTR, &block_offset);
+	if (block_offset == 0xffff)
+		return;
+
+	/* Check if OEM version block has correct length. */
+	i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_LENGTH_OFFSET,
+			   &block_length);
+	if (block_length < I40E_NVM_OEM_LENGTH)
+		return;
+
+	/* Check if OEM version format is as expected. */
+	i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_CAPABILITIES_OFFSET,
+			   &capabilities);
+	if ((capabilities & I40E_NVM_OEM_CAPABILITIES_MASK) != 0)
+		return;
+
+	i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_GEN_OFFSET,
+			   &gen_snap);
+	i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_RELEASE_OFFSET,
+			   &release);
+	hw->nvm.oem_ver = (gen_snap << I40E_OEM_SNAP_SHIFT) | release;
+	hw->nvm.eetrack = I40E_OEM_EETRACK_ID;
+}
+
 /**
  * i40e_reset - wait for core reset to finish reset, reset pf if corer not seen
  * @pf: board private structure
@@ -7154,6 +7199,7 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
 			 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
 		goto clear_recovery;
 	}
+	i40e_get_oem_version(&pf->hw);
 
 	/* re-verify the eeprom if we just had an EMP reset */
 	if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state))
@@ -11338,6 +11384,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 		goto err_pf_reset;
 	}
+	i40e_get_oem_version(hw);
 
 	/* provide nvm, fw, api versions */
 	dev_info(&pdev->dev, "fw %d.%d.%05d api %d.%d nvm %s\n",