From: Konrad Knitter <konrad.knitter@intel.com>
Date: Wed, 6 Nov 2024 09:36:41 +0000 (+0100)
Subject: pldmfw: enable selected component update
X-Git-Tag: v6.14-rc1~162^2~33^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d4679b79ffae994fea08bc7751ff6550ad057f05;p=thirdparty%2Fkernel%2Flinux.git

pldmfw: enable selected component update

This patch enables to update a selected component from PLDM image
containing multiple components.

Example usage:

struct pldmfw;
data.mode = PLDMFW_UPDATE_MODE_SINGLE_COMPONENT;
data.compontent_identifier = DRIVER_FW_MGMT_COMPONENT_ID;

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Konrad Knitter <konrad.knitter@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---

diff --git a/include/linux/pldmfw.h b/include/linux/pldmfw.h
index 0fc8313382262..f5047983004f0 100644
--- a/include/linux/pldmfw.h
+++ b/include/linux/pldmfw.h
@@ -125,9 +125,17 @@ struct pldmfw_ops;
  * a pointer to their own data, used to implement the device specific
  * operations.
  */
+
+enum pldmfw_update_mode {
+	PLDMFW_UPDATE_MODE_FULL,
+	PLDMFW_UPDATE_MODE_SINGLE_COMPONENT,
+};
+
 struct pldmfw {
 	const struct pldmfw_ops *ops;
 	struct device *dev;
+	u16 component_identifier;
+	enum pldmfw_update_mode mode;
 };
 
 bool pldmfw_op_pci_match_record(struct pldmfw *context, struct pldmfw_record *record);
diff --git a/lib/pldmfw/pldmfw.c b/lib/pldmfw/pldmfw.c
index 6e1581b9a6161..6264e2013f25e 100644
--- a/lib/pldmfw/pldmfw.c
+++ b/lib/pldmfw/pldmfw.c
@@ -481,9 +481,17 @@ static int pldm_parse_components(struct pldmfw_priv *data)
 		component->component_data = data->fw->data + offset;
 		component->component_size = size;
 
+		if (data->context->mode == PLDMFW_UPDATE_MODE_SINGLE_COMPONENT &&
+		    data->context->component_identifier != component->identifier)
+			continue;
+
 		list_add_tail(&component->entry, &data->components);
 	}
 
+	if (data->context->mode == PLDMFW_UPDATE_MODE_SINGLE_COMPONENT &&
+	    list_empty(&data->components))
+		return -ENOENT;
+
 	header_crc_ptr = data->fw->data + data->offset;
 
 	err = pldm_move_fw_offset(data, sizeof(data->header_crc));