[patch net-next v3 7/8] netdevsim: implement fake flash updating with notifications

[Jiri Pirko]

From: Jiri Pirko <j...@mellanox.com>

Signed-off-by: Jiri Pirko <j...@mellanox.com>
---
v1->v2:
- added debugfs toggle to enable/disable flash status notifications
---
 drivers/net/netdevsim/dev.c       | 44 +++++++++++++++++++++++++++++++
 drivers/net/netdevsim/netdevsim.h |  1 +
 2 files changed, 45 insertions(+)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index b509b941d5ca..c5c417a3c0ce 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -38,6 +38,8 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
        nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
        if (IS_ERR_OR_NULL(nsim_dev->ports_ddir))
                return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL;
+       debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
+                           &nsim_dev->fw_update_status);
        return 0;
 }
 
@@ -220,8 +222,49 @@ static int nsim_dev_reload(struct devlink *devlink,
        return 0;
 }
 
+#define NSIM_DEV_FLASH_SIZE 500000
+#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
+#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
+
+static int nsim_dev_flash_update(struct devlink *devlink, const char 
*file_name,
+                                const char *component,
+                                struct netlink_ext_ack *extack)
+{
+       struct nsim_dev *nsim_dev = devlink_priv(devlink);
+       int i;
+
+       if (nsim_dev->fw_update_status) {
+               devlink_flash_update_begin_notify(devlink);
+               devlink_flash_update_status_notify(devlink,
+                                                  "Preparing to flash",
+                                                  component, 0, 0);
+       }
+
+       for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
+               if (nsim_dev->fw_update_status)
+                       devlink_flash_update_status_notify(devlink, "Flashing",
+                                                          component,
+                                                          i * 
NSIM_DEV_FLASH_CHUNK_SIZE,
+                                                          NSIM_DEV_FLASH_SIZE);
+               msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
+       }
+
+       if (nsim_dev->fw_update_status) {
+               devlink_flash_update_status_notify(devlink, "Flashing",
+                                                  component,
+                                                  NSIM_DEV_FLASH_SIZE,
+                                                  NSIM_DEV_FLASH_SIZE);
+               devlink_flash_update_status_notify(devlink, "Flashing done",
+                                                  component, 0, 0);
+               devlink_flash_update_end_notify(devlink);
+       }
+
+       return 0;
+}
+
 static const struct devlink_ops nsim_dev_devlink_ops = {
        .reload = nsim_dev_reload,
+       .flash_update = nsim_dev_flash_update,
 };
 
 static struct nsim_dev *
@@ -240,6 +283,7 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned 
int port_count)
        get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
        INIT_LIST_HEAD(&nsim_dev->port_list);
        mutex_init(&nsim_dev->port_list_lock);
+       nsim_dev->fw_update_status = true;
 
        nsim_dev->fib_data = nsim_fib_create();
        if (IS_ERR(nsim_dev->fib_data)) {
diff --git a/drivers/net/netdevsim/netdevsim.h 
b/drivers/net/netdevsim/netdevsim.h
index 3f398797c2bc..79c05af2a7c0 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -157,6 +157,7 @@ struct nsim_dev {
        struct netdev_phys_item_id switch_id;
        struct list_head port_list;
        struct mutex port_list_lock; /* protects port list */
+       bool fw_update_status;
 };
 
 int nsim_dev_init(void);
-- 
2.17.2