Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/ef100_sriov.c b/drivers/net/ethernet/sfc/ef100_sriov.c
new file mode 100644
index 000000000..94bdbfcb4
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_sriov.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2019 Solarflare Communications Inc.
+ * Copyright 2020-2022 Xilinx Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#include "ef100_sriov.h"
+#include "ef100_nic.h"
+#include "ef100_rep.h"
+
+static int efx_ef100_pci_sriov_enable(struct efx_nic *efx, int num_vfs)
+{
+	struct ef100_nic_data *nic_data = efx->nic_data;
+	struct pci_dev *dev = efx->pci_dev;
+	struct efx_rep *efv, *next;
+	int rc, i;
+
+	efx->vf_count = num_vfs;
+	rc = pci_enable_sriov(dev, num_vfs);
+	if (rc)
+		goto fail1;
+
+	if (!nic_data->grp_mae)
+		return 0;
+
+	for (i = 0; i < num_vfs; i++) {
+		rc = efx_ef100_vfrep_create(efx, i);
+		if (rc)
+			goto fail2;
+	}
+	return 0;
+
+fail2:
+	list_for_each_entry_safe(efv, next, &efx->vf_reps, list)
+		efx_ef100_vfrep_destroy(efx, efv);
+	pci_disable_sriov(dev);
+fail1:
+	netif_err(efx, probe, efx->net_dev, "Failed to enable SRIOV VFs\n");
+	efx->vf_count = 0;
+	return rc;
+}
+
+int efx_ef100_pci_sriov_disable(struct efx_nic *efx, bool force)
+{
+	struct pci_dev *dev = efx->pci_dev;
+	unsigned int vfs_assigned;
+
+	vfs_assigned = pci_vfs_assigned(dev);
+	if (vfs_assigned && !force) {
+		netif_info(efx, drv, efx->net_dev, "VFs are assigned to guests; "
+			   "please detach them before disabling SR-IOV\n");
+		return -EBUSY;
+	}
+
+	efx_ef100_fini_vfreps(efx);
+	if (!vfs_assigned)
+		pci_disable_sriov(dev);
+	return 0;
+}
+
+int efx_ef100_sriov_configure(struct efx_nic *efx, int num_vfs)
+{
+	if (num_vfs == 0)
+		return efx_ef100_pci_sriov_disable(efx, false);
+	else
+		return efx_ef100_pci_sriov_enable(efx, num_vfs);
+}