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Date: Sat, 27 Nov 2021 19:45:30 +0200
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
mkubecek@...e.cz, pali@...nel.org, jacob.e.keller@...el.com,
vadimp@...dia.com, mlxsw@...dia.com,
Ido Schimmel <idosch@...dia.com>
Subject: [RFC PATCH net-next 4/4] netdevsim: Implement support for ethtool_ops::start_fw_flash_module
From: Ido Schimmel <idosch@...dia.com>
For RFC purposes only, implement support for
ethtool_ops::start_fw_flash_module.
A real implementation is expected to call CMIS common code (WIP) that
can be shared across all MAC drivers.
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
drivers/net/netdevsim/ethtool.c | 129 ++++++++++++++++++++++++++++++
drivers/net/netdevsim/netdevsim.h | 10 +++
2 files changed, 139 insertions(+)
diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c
index 690cd12a4245..f126b03bf5b0 100644
--- a/drivers/net/netdevsim/ethtool.c
+++ b/drivers/net/netdevsim/ethtool.c
@@ -3,6 +3,8 @@
#include <linux/debugfs.h>
#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
+#include <linux/firmware.h>
#include <linux/random.h>
#include "netdevsim.h"
@@ -171,6 +173,127 @@ static int nsim_get_module_fw_info(struct net_device *dev,
return 0;
}
+static void nsim_module_fw_flash_download(struct netdevsim *ns)
+{
+ struct ethtool_module_fw_flash_ntf_params params = {};
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_IN_PROGRESS;
+ params.status_msg = "Downloading firmware image";
+ params.done = 0;
+ params.total = 1500;
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+
+ params.done = 750;
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+
+ params.done = 1500;
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+}
+
+static void nsim_module_fw_flash_validate(struct netdevsim *ns)
+{
+ struct ethtool_module_fw_flash_ntf_params params = {};
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_IN_PROGRESS;
+ params.status_msg = "Validating firmware image download";
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+}
+
+static void nsim_module_fw_flash_run(struct netdevsim *ns)
+{
+ struct ethtool_module_fw_flash_ntf_params params = {};
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_IN_PROGRESS;
+ params.status_msg = "Running firmware image";
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+}
+
+static void nsim_module_fw_flash_commit(struct netdevsim *ns)
+{
+ struct ethtool_module_fw_flash_ntf_params params = {};
+
+ if (!ns->ethtool.module_fw.params.commit)
+ return;
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_IN_PROGRESS;
+ params.status_msg = "Committing firmware image";
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ msleep(5000);
+}
+
+static void nsim_module_fw_flash(struct work_struct *work)
+{
+ struct ethtool_module_fw_flash_ntf_params params = {};
+ struct netdevsim *ns;
+
+ ns = container_of(work, struct netdevsim, ethtool.module_fw.work);
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_STARTED;
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ if (!ns->ethtool.module_fw.fw)
+ goto commit;
+
+ nsim_module_fw_flash_download(ns);
+ nsim_module_fw_flash_validate(ns);
+ nsim_module_fw_flash_run(ns);
+commit:
+ nsim_module_fw_flash_commit(ns);
+
+ params.status = ETHTOOL_MODULE_FW_FLASH_STATUS_COMPLETED;
+ ethnl_module_fw_flash_ntf(ns->netdev, ¶ms);
+
+ dev_put(ns->netdev);
+ rtnl_lock();
+ ns->ethtool.module_fw.in_progress = false;
+ rtnl_unlock();
+ release_firmware(ns->ethtool.module_fw.fw);
+}
+
+static int
+nsim_start_fw_flash_module(struct net_device *dev,
+ const struct ethtool_module_fw_flash_params *params,
+ struct netlink_ext_ack *extack)
+{
+ struct netdevsim *ns = netdev_priv(dev);
+
+ if (ns->ethtool.module_fw.in_progress) {
+ NL_SET_ERR_MSG(extack, "Module firmware flashing already in progress");
+ return -EBUSY;
+ }
+
+ ns->ethtool.module_fw.fw = NULL;
+ if (params->file_name) {
+ int err;
+
+ err = request_firmware(&ns->ethtool.module_fw.fw,
+ params->file_name, &dev->dev);
+ if (err) {
+ NL_SET_ERR_MSG(extack,
+ "Failed to request module firmware image");
+ return err;
+ }
+ }
+
+ ns->ethtool.module_fw.in_progress = true;
+ dev_hold(dev);
+ ns->ethtool.module_fw.params = *params;
+ schedule_work(&ns->ethtool.module_fw.work);
+
+ return 0;
+}
+
static const struct ethtool_ops nsim_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
.get_pause_stats = nsim_get_pause_stats,
@@ -185,6 +308,7 @@ static const struct ethtool_ops nsim_ethtool_ops = {
.get_fecparam = nsim_get_fecparam,
.set_fecparam = nsim_set_fecparam,
.get_module_fw_info = nsim_get_module_fw_info,
+ .start_fw_flash_module = nsim_start_fw_flash_module,
};
static void nsim_ethtool_ring_init(struct netdevsim *ns)
@@ -228,4 +352,9 @@ void nsim_ethtool_init(struct netdevsim *ns)
&ns->ethtool.ring.rx_mini_max_pending);
debugfs_create_u32("tx_max_pending", 0600, dir,
&ns->ethtool.ring.tx_max_pending);
+
+ /* The work item holds a reference on the netdev, so its unregistration
+ * cannot be completed while the work is queued or executing.
+ */
+ INIT_WORK(&ns->ethtool.module_fw.work, nsim_module_fw_flash);
}
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index c49771f27f17..afa8f9c7f22c 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -16,6 +16,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/ethtool.h>
+#include <linux/firmware.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/netdevice.h>
@@ -59,14 +60,23 @@ struct nsim_ethtool_pauseparam {
bool report_stats_tx;
};
+struct nsim_ethtool_module_fw {
+ struct ethtool_module_fw_flash_params params;
+ struct work_struct work;
+ const struct firmware *fw;
+ bool in_progress;
+};
+
struct nsim_ethtool {
u32 get_err;
u32 set_err;
u32 channels;
struct nsim_ethtool_pauseparam pauseparam;
+ struct nsim_ethtool_module_fw module_fw;
struct ethtool_coalesce coalesce;
struct ethtool_ringparam ring;
struct ethtool_fecparam fec;
+
};
struct netdevsim {
--
2.31.1
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