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Date: Fri, 31 Jul 2020 17:21:57 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: netdev@...r.kernel.org
Cc: Jacob Keller <jacob.e.keller@...el.com>
Subject: [net-next v2 3/5] ice: add support for flash update overwrite mask
The ice driver has the ability to inform firmware of what sections of
flash to preserve when performing an update. Expose this support via the
recently added overwrite_mask support. Based on which sections are
specified, determine the equivalent preservation level and inform
firmware.
Reject combinations of sections that cannot be handled by the
preservation levels. Specifically, a request to overwrite identifiers
but not settings cannot be done, so it is rejected as not supported.
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
---
Changes since v1
* add this patch containing the ice changes as a separate commit
Documentation/networking/devlink/ice.rst | 31 +++++++++++++++++++
drivers/net/ethernet/intel/ice/ice_devlink.c | 19 +++++++++++-
.../net/ethernet/intel/ice/ice_fw_update.c | 16 ++++++++--
.../net/ethernet/intel/ice/ice_fw_update.h | 2 +-
4 files changed, 64 insertions(+), 4 deletions(-)
diff --git a/Documentation/networking/devlink/ice.rst b/Documentation/networking/devlink/ice.rst
index 237848d56f9b..8eb50ba41f1a 100644
--- a/Documentation/networking/devlink/ice.rst
+++ b/Documentation/networking/devlink/ice.rst
@@ -81,6 +81,37 @@ The ``ice`` driver reports the following versions
- 0xee16ced7
- The first 4 bytes of the hash of the netlist module contents.
+Flash Update
+============
+
+The ``ice`` driver implements support for flash update using the
+``devlink-flash`` interface. It supports updating the device flash using a
+combined flash image that contains the ``fw.mgmt``, ``fw.undi``, and
+``fw.netlist`` components.
+
+.. list-table:: List of supported overwrite modes
+ :widths: 5 95
+
+ * - Bits
+ - Behavior
+ * - ``DEVLINK_FLASH_OVERWRITE_SETTINGS``
+ - Do not preserve settings stored in the flash components being
+ updated. This includes overwriting the port configuration that
+ determines the number of physical functions the device will
+ initialize with.
+ * - ``DEVLINK_FLASH_OVERWRITE_SETTINGS`` and ``DEVLINK_FLASH_OVERWRITE_IDENTIFIERS``
+ - Do not preserve either settings or identifiers. Overwrite everything
+ in the flash with the contents from the provided image, without
+ performing any preservation. This includes overwriting device
+ identifying fields such as the MAC address, VPD area, and device
+ serial number. It is expected that this combination be used with an
+ image customized for the specific device.
+
+The ice hardware does not support overwriting only identifiers while
+preserving settings, and thus ``DEVLINK_FLASH_OVERWRITE_IDENTIFIERS`` on its
+own will be rejected. If no overwrite mask is provided, the firmware will be
+instructed to preserve all settings and identifying fields when updating.
+
Regions
=======
diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
index c8255235f7c4..d2cb9144c63f 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -250,8 +250,24 @@ ice_devlink_flash_update(struct devlink *devlink,
struct device *dev = &pf->pdev->dev;
struct ice_hw *hw = &pf->hw;
const struct firmware *fw;
+ u8 preservation;
int err;
+ if (!params->overwrite_mask) {
+ /* preserve all settings and identifiers */
+ preservation = ICE_AQC_NVM_PRESERVE_ALL;
+ } else if (params->overwrite_mask == DEVLINK_FLASH_OVERWRITE_SETTINGS) {
+ /* overwrite settings, but preserve the vital device identifiers */
+ preservation = ICE_AQC_NVM_PRESERVE_SELECTED;
+ } else if (params->overwrite_mask == (DEVLINK_FLASH_OVERWRITE_SETTINGS |
+ DEVLINK_FLASH_OVERWRITE_IDENTIFIERS)) {
+ /* overwrite both settings and identifiers, preserve nothing */
+ preservation = ICE_AQC_NVM_NO_PRESERVATION;
+ } else {
+ NL_SET_ERR_MSG_MOD(extack, "Requested overwrite mask is not supported");
+ return -EOPNOTSUPP;
+ }
+
if (!hw->dev_caps.common_cap.nvm_unified_update) {
NL_SET_ERR_MSG_MOD(extack, "Current firmware does not support unified update");
return -EOPNOTSUPP;
@@ -270,7 +286,7 @@ ice_devlink_flash_update(struct devlink *devlink,
devlink_flash_update_begin_notify(devlink);
devlink_flash_update_status_notify(devlink, "Preparing to flash",
NULL, 0, 0);
- err = ice_flash_pldm_image(pf, fw, extack);
+ err = ice_flash_pldm_image(pf, fw, preservation, extack);
devlink_flash_update_end_notify(devlink);
release_firmware(fw);
@@ -279,6 +295,7 @@ ice_devlink_flash_update(struct devlink *devlink,
}
static const struct devlink_ops ice_devlink_ops = {
+ .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
.info_get = ice_devlink_info_get,
.flash_update = ice_devlink_flash_update,
};
diff --git a/drivers/net/ethernet/intel/ice/ice_fw_update.c b/drivers/net/ethernet/intel/ice/ice_fw_update.c
index deaefe00c9c0..c81273000d88 100644
--- a/drivers/net/ethernet/intel/ice/ice_fw_update.c
+++ b/drivers/net/ethernet/intel/ice/ice_fw_update.c
@@ -630,6 +630,7 @@ static const struct pldmfw_ops ice_fwu_ops = {
* ice_flash_pldm_image - Write a PLDM-formatted firmware image to the device
* @pf: private device driver structure
* @fw: firmware object pointing to the relevant firmware file
+ * @preservation: preservation level to request from firmware
* @extack: netlink extended ACK structure
*
* Parse the data for a given firmware file, verifying that it is a valid PLDM
@@ -643,7 +644,7 @@ static const struct pldmfw_ops ice_fwu_ops = {
* Returns: zero on success or a negative error code on failure.
*/
int ice_flash_pldm_image(struct ice_pf *pf, const struct firmware *fw,
- struct netlink_ext_ack *extack)
+ u8 preservation, struct netlink_ext_ack *extack)
{
struct device *dev = ice_pf_to_dev(pf);
struct ice_hw *hw = &pf->hw;
@@ -651,13 +652,24 @@ int ice_flash_pldm_image(struct ice_pf *pf, const struct firmware *fw,
enum ice_status status;
int err;
+ switch (preservation) {
+ case ICE_AQC_NVM_PRESERVE_ALL:
+ case ICE_AQC_NVM_PRESERVE_SELECTED:
+ case ICE_AQC_NVM_NO_PRESERVATION:
+ case ICE_AQC_NVM_FACTORY_DEFAULT:
+ break;
+ default:
+ WARN(1, "Unexpected preservation level request %u", preservation);
+ return -EINVAL;
+ }
+
memset(&priv, 0, sizeof(priv));
priv.context.ops = &ice_fwu_ops;
priv.context.dev = dev;
priv.extack = extack;
priv.pf = pf;
- priv.activate_flags = ICE_AQC_NVM_PRESERVE_ALL;
+ priv.activate_flags = preservation;
status = ice_acquire_nvm(hw, ICE_RES_WRITE);
if (status) {
diff --git a/drivers/net/ethernet/intel/ice/ice_fw_update.h b/drivers/net/ethernet/intel/ice/ice_fw_update.h
index 79472cc618b4..c6390f6851ff 100644
--- a/drivers/net/ethernet/intel/ice/ice_fw_update.h
+++ b/drivers/net/ethernet/intel/ice/ice_fw_update.h
@@ -5,7 +5,7 @@
#define _ICE_FW_UPDATE_H_
int ice_flash_pldm_image(struct ice_pf *pf, const struct firmware *fw,
- struct netlink_ext_ack *extack);
+ u8 preservation, struct netlink_ext_ack *extack);
int ice_check_for_pending_update(struct ice_pf *pf, const char *component,
struct netlink_ext_ack *extack);
--
2.28.0.163.g6104cc2f0b60
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