net: ionic: Provide RDMA reset support for the RDMA driver

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>
Link: https://patch.msgid.link/20250903061606.4139957-5-abhijit.gangurde@amd.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_api.h b/drivers/net/ethernet/pensando/ionic/ionic_api.h
index d75902ca34af3bfd0da3589b3ba9bb8a819d8493..e0b766d1769f54ae1cc3ed09dc18849f2db05d2c 100644 (file)
--- 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 f3c2a5227b363ea4839441997624376ab56a549e..a2be338eb3e5f99052ff47e4a51113996a8b39d6 100644 (file)
--- 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");