sfc: support X4 devlink flash

Unlike X2 and EF100, we do not attempt to parse the firmware file to
 find an image within it; we simply hand the entire file to the MC,
 which is responsible for understanding any container formats we might
 use and validating that the firmware file is applicable to this NIC.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://patch.msgid.link/9a72a74002a7819c780b0a18ce9294c9d4e1db12.1742493017.git.ecree.xilinx@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Edward Cree

drivers/net/ethernet/sfc/ef10.c

@@ -4419,6 +4419,7 @@ const struct efx_nic_type efx_x4_nic_type = {
 	.can_rx_scatter = true,
 	.always_rx_scatter = true,
 	.option_descriptors = true,
+	.flash_auto_partition = true,
 	.min_interrupt_mode = EFX_INT_MODE_MSIX,
 	.timer_period_max = 1 << ERF_DD_EVQ_IND_TIMER_VAL_WIDTH,
 	.offload_features = EF10_OFFLOAD_FEATURES,

drivers/net/ethernet/sfc/efx_reflash.c

@@ -407,31 +407,40 @@ int efx_reflash_flash_firmware(struct efx_nic *efx, const struct firmware *fw,
 		return -EOPNOTSUPP;
 	}
 
-	devlink_flash_update_status_notify(devlink, "Checking update", NULL, 0, 0);
+	mutex_lock(&efx->reflash_mutex);
 
-	rc = efx_reflash_parse_firmware_data(fw, &type, &data_subtype, &data,
-					     &data_size);
-	if (rc) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "Firmware image validation check failed");
-		goto out;
-	}
+	devlink_flash_update_status_notify(devlink, "Checking update", NULL, 0, 0);
 
-	mutex_lock(&efx->reflash_mutex);
+	if (efx->type->flash_auto_partition) {
+		/* NIC wants entire FW file including headers;
+		 * FW will validate 'subtype' if there is one
+		 */
+		type = NVRAM_PARTITION_TYPE_AUTO;
+		data = fw->data;
+		data_size = fw->size;
+	} else {
+		rc = efx_reflash_parse_firmware_data(fw, &type, &data_subtype, &data,
+						     &data_size);
+		if (rc) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Firmware image validation check failed");
+			goto out_unlock;
+		}
 
-	rc = efx_mcdi_nvram_metadata(efx, type, &subtype, NULL, NULL, 0);
-	if (rc) {
-		NL_SET_ERR_MSG_FMT_MOD(extack,
-				       "Metadata query for NVRAM partition %#x failed",
-				       type);
-		goto out_unlock;
-	}
+		rc = efx_mcdi_nvram_metadata(efx, type, &subtype, NULL, NULL, 0);
+		if (rc) {
+			NL_SET_ERR_MSG_FMT_MOD(extack,
+					       "Metadata query for NVRAM partition %#x failed",
+					       type);
+			goto out_unlock;
+		}
 
-	if (subtype != data_subtype) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "Firmware image is not appropriate for this adapter");
-		rc = -EINVAL;
-		goto out_unlock;
+		if (subtype != data_subtype) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Firmware image is not appropriate for this adapter");
+			rc = -EINVAL;
+			goto out_unlock;
+		}
 	}
 
 	rc = efx_mcdi_nvram_info(efx, type, &size, &erase_align, &write_align,
@@ -506,7 +515,6 @@ int efx_reflash_flash_firmware(struct efx_nic *efx, const struct firmware *fw,
 		rc = efx_mcdi_nvram_update_finish_polled(efx, type);
 out_unlock:
 	mutex_unlock(&efx->reflash_mutex);
-out:
 	devlink_flash_update_status_notify(devlink, rc ? "Update failed" :
 							 "Update complete",
 					   NULL, 0, 0);

drivers/net/ethernet/sfc/net_driver.h

@@ -1381,6 +1381,8 @@ struct efx_udp_tunnel {
  * @can_rx_scatter: NIC is able to scatter packets to multiple buffers
  * @always_rx_scatter: NIC will always scatter packets to multiple buffers
  * @option_descriptors: NIC supports TX option descriptors
+ * @flash_auto_partition: firmware flash uses AUTO partition, driver does
+ *	not need to perform image parsing
  * @min_interrupt_mode: Lowest capability interrupt mode supported
  *	from &enum efx_int_mode.
  * @timer_period_max: Maximum period of interrupt timer (in ticks)
@@ -1557,6 +1559,7 @@ struct efx_nic_type {
 	bool can_rx_scatter;
 	bool always_rx_scatter;
 	bool option_descriptors;
+	bool flash_auto_partition;
 	unsigned int min_interrupt_mode;
 	unsigned int timer_period_max;
 	netdev_features_t offload_features;