[PATCH v6 04/14] net: ionic: Provide RDMA reset support for the RDMA driver

Abhijit Gangurde
2025-09-03T06:17:41Z

The Ethernet driver holds the privilege to execute the device commands.
Export the function to execute RDMA reset command for use by RDMA driver.

Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
---
.../net/ethernet/pensando/ionic/ionic_api.h | 9 ++++++++
.../net/ethernet/pensando/ionic/ionic_aux.c | 22 +++++++++++++++++++
2 files changed, 31 insertions(+)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_api.h b/drivers/net/ethernet/pensando/ionic/ionic_api.h
index d75902ca34af..e0b766d1769f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_api.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_api.h
@@ -54,4 +54,13 @@ int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx);
*/
int ionic_error_to_errno(enum ionic_status_code code);

+/**
+ * ionic_request_rdma_reset - request reset or disable the device or lif
+ * @lif: Logical interface
+ *
+ * The reset is triggered asynchronously. It will wait until reset request
+ * completes or times out.
+ */
+void ionic_request_rdma_reset(struct ionic_lif *lif);
+
#endif /* _IONIC_API_H_ */
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_aux.c b/drivers/net/ethernet/pensando/ionic/ionic_aux.c
index f3c2a5227b36..a2be338eb3e5 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_aux.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_aux.c
@@ -78,3 +78,25 @@ void ionic_auxbus_unregister(struct ionic_lif *lif)
out:
mutex_unlock(&lif->adev_lock);
}
+
+void ionic_request_rdma_reset(struct ionic_lif *lif)
+{
+ struct ionic *ionic = lif->ionic;
+ int err;
+
+ union ionic_dev_cmd cmd = {
+ .cmd.opcode = IONIC_CMD_RDMA_RESET_LIF,
+ .cmd.lif_index = cpu_to_le16(lif->index),
+ };
+
+ mutex_lock(&ionic->dev_cmd_lock);
+
+ ionic_dev_cmd_go(&ionic->idev, &cmd);
+ err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+
+ mutex_unlock(&ionic->dev_cmd_lock);
+
+ if (err)
+ pr_warn("%s request_reset: error %d\n", __func__, err);
+}
+EXPORT_SYMBOL_NS(ionic_request_rdma_reset, "NET_IONIC");
--
2.43.0