ice: Add handler to configure SR-IOV

This patch implements parts of ice_sriov_configure and VF reset flow.

To create virtual functions (VFs), the user sets a value in num_vfs
through sysfs. This results in the kernel calling the handler for
.sriov_configure which is ice_sriov_configure.

VF setup first starts with a VF reset, followed by allocation of the VF
VSI using ice_vf_vsi_setup. Once the VF setup is complete a state bit
ICE_VF_STATE_INIT is set in the vf->states bitmap to indicate that
the VF is ready to go.

Also for VF reset to go into effect, it's necessary to issue a disable
queue command (ice_aqc_opc_dis_txqs). So this patch updates multiple
functions in the disable queue flow to take additional parameters that
distinguish if queues are being disabled due to VF reset.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h
new file mode 100644
index 000000000000..85c263a7494c
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2018, Intel Corporation. */
+
+#ifndef _ICE_VIRTCHNL_PF_H_
+#define _ICE_VIRTCHNL_PF_H_
+#include "ice.h"
+
+/* Static VF transaction/status register def */
+#define VF_DEVICE_STATUS		0xAA
+#define VF_TRANS_PENDING_M		0x20
+
+/* Specific VF states */
+enum ice_vf_states {
+	ICE_VF_STATE_INIT = 0,
+	ICE_VF_STATE_ACTIVE,
+	ICE_VF_STATE_ENA,
+	ICE_VF_STATE_DIS,
+	ICE_VF_STATE_MC_PROMISC,
+	ICE_VF_STATE_UC_PROMISC,
+	/* state to indicate if PF needs to do vector assignment for VF.
+	 * This needs to be set during first time VF initialization or later
+	 * when VF asks for more Vectors through virtchnl OP.
+	 */
+	ICE_VF_STATE_CFG_INTR,
+	ICE_VF_STATES_NBITS
+};
+
+/* VF capabilities */
+enum ice_virtchnl_cap {
+	ICE_VIRTCHNL_VF_CAP_L2 = 0,
+	ICE_VIRTCHNL_VF_CAP_PRIVILEGE,
+};
+
+/* VF information structure */
+struct ice_vf {
+	struct ice_pf *pf;
+
+	s16 vf_id;			/* VF id in the PF space */
+	int first_vector_idx;		/* first vector index of this VF */
+	struct ice_sw *vf_sw_id;	/* switch id the VF VSIs connect to */
+	struct virtchnl_ether_addr dflt_lan_addr;
+	u16 port_vlan_id;
+	u8 trusted;
+	u16 lan_vsi_idx;		/* index into PF struct */
+	u16 lan_vsi_num;		/* ID as used by firmware */
+	unsigned long vf_caps;		/* vf's adv. capabilities */
+	DECLARE_BITMAP(vf_states, ICE_VF_STATES_NBITS);	/* VF runtime states */
+	u8 spoofchk;
+	u16 num_mac;
+	u16 num_vlan;
+};
+
+#ifdef CONFIG_PCI_IOV
+int ice_sriov_configure(struct pci_dev *pdev, int num_vfs);
+void ice_free_vfs(struct ice_pf *pf);
+bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr);
+#else /* CONFIG_PCI_IOV */
+#define ice_free_vfs(pf) do {} while (0)
+
+static inline bool
+ice_reset_all_vfs(struct ice_pf __always_unused *pf,
+		  bool __always_unused is_vflr)
+{
+	return true;
+}
+
+static inline int
+ice_sriov_configure(struct pci_dev __always_unused *pdev,
+		    int __always_unused num_vfs)
+{
+	return -EOPNOTSUPP;
+}
+#endif /* CONFIG_PCI_IOV */
+#endif /* _ICE_VIRTCHNL_PF_H_ */