ice: display stored UNDI firmware version via devlink info

Just as we recently added support for other stored firmware flash
versions, support display of the stored UNDI Option ROM version via
devlink info.

To do this, we need to introduce a new ice_get_inactive_orom_ver
function. This is a little trickier than with other flash versions. The
Option ROM version data was being read from a special "Boot
Configuration" block of the NVM Preserved Field Area. This block only
contains the *active* Option ROM version data. It is populated when the
device firmware finishes updating the Option ROM.

This method is ineffective at reading the stored Option ROM version
data. Instead of reading from this section of the flash, replace this
version extraction with one which locates the Combo Version information
from within the Option ROM binary.

This data is stored within the Option ROM at a 512 byte offset, in
a simple structured format. The structure uses a simple modulo 256
checksum for integrity verification. Scan through the Option ROM to
locate the CIVD data section, and extract the Combo Version.

Refactor ice_get_orom_ver_info so that it takes the bank select
enumeration parameter. Use this to implement ice_get_inactive_orom_ver.

Although all ice devices have a Boot Configuration block in the NVM PFA,
not all devices have a valid Option ROM. In this case, the old
ice_get_orom_ver_info would "succeed" but report a version of all
zeros. The new implementation would fail to locate the $CIV section in
the Option ROM and report an error. Thus, we must ensure that
ice_init_nvm does not fail if ice_get_orom_ver_info fails.

Use the new ice_get_inactive_orom_ver to allow reporting the Option ROM
versions for a pending update via devlink info.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 78 insertions, 37 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c
index 6d5218d96bec..75ccbfc07f99 100644
--- a/drivers/net/ethernet/intel/ice/ice_nvm.c
+++ b/drivers/net/ethernet/intel/ice/ice_nvm.c
@@ -607,61 +607,104 @@ enum ice_status ice_get_inactive_nvm_ver(struct ice_hw *hw, struct ice_nvm_info
 }
 
 /**
- * ice_get_orom_ver_info - Read Option ROM version information
+ * ice_get_orom_civd_data - Get the combo version information from Option ROM
  * @hw: pointer to the HW struct
- * @orom: pointer to Option ROM info structure
+ * @bank: whether to read from the active or inactive flash module
+ * @civd: storage for the Option ROM CIVD data.
  *
- * Read the Combo Image version data from the Boot Configuration TLV and fill
- * in the option ROM version data.
+ * Searches through the Option ROM flash contents to locate the CIVD data for
+ * the image.
  */
 static enum ice_status
-ice_get_orom_ver_info(struct ice_hw *hw, struct ice_orom_info *orom)
+ice_get_orom_civd_data(struct ice_hw *hw, enum ice_bank_select bank,
+		       struct ice_orom_civd_info *civd)
 {
-	u16 combo_hi, combo_lo, boot_cfg_tlv, boot_cfg_tlv_len;
+	struct ice_orom_civd_info tmp;
 	enum ice_status status;
-	u32 combo_ver;
+	u32 offset;
 
-	status = ice_get_pfa_module_tlv(hw, &boot_cfg_tlv, &boot_cfg_tlv_len,
-					ICE_SR_BOOT_CFG_PTR);
-	if (status) {
-		ice_debug(hw, ICE_DBG_INIT, "Failed to read Boot Configuration Block TLV.\n");
-		return status;
-	}
-
-	/* Boot Configuration Block must have length at least 2 words
-	 * (Combo Image Version High and Combo Image Version Low)
+	/* The CIVD section is located in the Option ROM aligned to 512 bytes.
+	 * The first 4 bytes must contain the ASCII characters "$CIV".
+	 * A simple modulo 256 sum of all of the bytes of the structure must
+	 * equal 0.
 	 */
-	if (boot_cfg_tlv_len < 2) {
-		ice_debug(hw, ICE_DBG_INIT, "Invalid Boot Configuration Block TLV size.\n");
-		return ICE_ERR_INVAL_SIZE;
-	}
+	for (offset = 0; (offset + 512) <= hw->flash.banks.orom_size; offset += 512) {
+		u8 sum = 0, i;
 
-	status = ice_read_sr_word(hw, (boot_cfg_tlv + ICE_NVM_OROM_VER_OFF),
-				  &combo_hi);
-	if (status) {
-		ice_debug(hw, ICE_DBG_INIT, "Failed to read OROM_VER hi.\n");
-		return status;
+		status = ice_read_flash_module(hw, bank, ICE_SR_1ST_OROM_BANK_PTR,
+					       offset, (u8 *)&tmp, sizeof(tmp));
+		if (status) {
+			ice_debug(hw, ICE_DBG_NVM, "Unable to read Option ROM CIVD data\n");
+			return status;
+		}
+
+		/* Skip forward until we find a matching signature */
+		if (memcmp("$CIV", tmp.signature, sizeof(tmp.signature)) != 0)
+			continue;
+
+		/* Verify that the simple checksum is zero */
+		for (i = 0; i < sizeof(tmp); i++)
+			sum += ((u8 *)&tmp)[i];
+
+		if (sum) {
+			ice_debug(hw, ICE_DBG_NVM, "Found CIVD data with invalid checksum of %u\n",
+				  sum);
+			return ICE_ERR_NVM;
+		}
+
+		*civd = tmp;
+		return 0;
 	}
 
-	status = ice_read_sr_word(hw, (boot_cfg_tlv + ICE_NVM_OROM_VER_OFF + 1),
-				  &combo_lo);
+	return ICE_ERR_NVM;
+}
+
+/**
+ * ice_get_orom_ver_info - Read Option ROM version information
+ * @hw: pointer to the HW struct
+ * @bank: whether to read from the active or inactive flash module
+ * @orom: pointer to Option ROM info structure
+ *
+ * Read Option ROM version and security revision from the Option ROM flash
+ * section.
+ */
+static enum ice_status
+ice_get_orom_ver_info(struct ice_hw *hw, enum ice_bank_select bank, struct ice_orom_info *orom)
+{
+	struct ice_orom_civd_info civd;
+	enum ice_status status;
+	u32 combo_ver;
+
+	status = ice_get_orom_civd_data(hw, bank, &civd);
 	if (status) {
-		ice_debug(hw, ICE_DBG_INIT, "Failed to read OROM_VER lo.\n");
+		ice_debug(hw, ICE_DBG_NVM, "Failed to locate valid Option ROM CIVD data\n");
 		return status;
 	}
 
-	combo_ver = ((u32)combo_hi << 16) | combo_lo;
+	combo_ver = le32_to_cpu(civd.combo_ver);
 
-	orom->major = (u8)((combo_ver & ICE_OROM_VER_MASK) >>
-			   ICE_OROM_VER_SHIFT);
+	orom->major = (u8)((combo_ver & ICE_OROM_VER_MASK) >> ICE_OROM_VER_SHIFT);
 	orom->patch = (u8)(combo_ver & ICE_OROM_VER_PATCH_MASK);
-	orom->build = (u16)((combo_ver & ICE_OROM_VER_BUILD_MASK) >>
-			    ICE_OROM_VER_BUILD_SHIFT);
+	orom->build = (u16)((combo_ver & ICE_OROM_VER_BUILD_MASK) >> ICE_OROM_VER_BUILD_SHIFT);
 
 	return 0;
 }
 
 /**
+ * ice_get_inactive_orom_ver - Read Option ROM version from the inactive bank
+ * @hw: pointer to the HW structure
+ * @orom: storage for Option ROM version information
+ *
+ * Reads the Option ROM version and security revision data for the inactive
+ * section of flash. Used to access version data for a pending update that has
+ * not yet been activated.
+ */
+enum ice_status ice_get_inactive_orom_ver(struct ice_hw *hw, struct ice_orom_info *orom)
+{
+	return ice_get_orom_ver_info(hw, ICE_INACTIVE_FLASH_BANK, orom);
+}
+
+/**
  * ice_get_netlist_info
  * @hw: pointer to the HW struct
  * @bank: whether to read from the active or inactive flash bank
@@ -998,11 +1041,9 @@ enum ice_status ice_init_nvm(struct ice_hw *hw)
 		return status;
 	}
 
-	status = ice_get_orom_ver_info(hw, &flash->orom);
-	if (status) {
+	status = ice_get_orom_ver_info(hw, ICE_ACTIVE_FLASH_BANK, &flash->orom);
+	if (status)
 		ice_debug(hw, ICE_DBG_INIT, "Failed to read Option ROM info.\n");
-		return status;
-	}
 
 	/* read the netlist version information */
 	status = ice_get_netlist_info(hw, ICE_ACTIVE_FLASH_BANK, &flash->netlist);