1/* SPDX-License-Identifier: GPL-2.0-only */
2/****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2015 Solarflare Communications Inc.
5 */
6
7#ifndef SIENA_SRIOV_H
8#define SIENA_SRIOV_H
9
10#include "net_driver.h"
11
12/* On the SFC9000 family each port is associated with 1 PCI physical
13 * function (PF) handled by sfc and a configurable number of virtual
14 * functions (VFs) that may be handled by some other driver, often in
15 * a VM guest. The queue pointer registers are mapped in both PF and
16 * VF BARs such that an 8K region provides access to a single RX, TX
17 * and event queue (collectively a Virtual Interface, VI or VNIC).
18 *
19 * The PF has access to all 1024 VIs while VFs are mapped to VIs
20 * according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
21 * in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
22 * The number of VIs and the VI_SCALE value are configurable but must
23 * be established at boot time by firmware.
24 */
25
26/* Maximum VI_SCALE parameter supported by Siena */
27#define EFX_VI_SCALE_MAX 6
28/* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
29 * so this is the smallest allowed value.
30 */
31#define EFX_VI_BASE 128U
32/* Maximum number of VFs allowed */
33#define EFX_VF_COUNT_MAX 127
34/* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
35#define EFX_MAX_VF_EVQ_SIZE 8192UL
36/* The number of buffer table entries reserved for each VI on a VF */
37#define EFX_VF_BUFTBL_PER_VI \
38 ((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) * \
39 sizeof(efx_qword_t) / EFX_BUF_SIZE)
40
41int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs);
42int efx_siena_sriov_init(struct efx_nic *efx);
43void efx_siena_sriov_fini(struct efx_nic *efx);
44int efx_siena_sriov_mac_address_changed(struct efx_nic *efx);
45bool efx_siena_sriov_wanted(struct efx_nic *efx);
46void efx_siena_sriov_reset(struct efx_nic *efx);
47void efx_siena_sriov_flr(struct efx_nic *efx, unsigned flr);
48
49int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf, const u8 *mac);
50int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf,
51 u16 vlan, u8 qos);
52int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
53 bool spoofchk);
54int efx_siena_sriov_get_vf_config(struct efx_nic *efx, int vf,
55 struct ifla_vf_info *ivf);
56
57#ifdef CONFIG_SFC_SIENA_SRIOV
58
59static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
60{
61 return efx->vf_init_count != 0;
62}
63
64int efx_init_sriov(void);
65void efx_fini_sriov(void);
66#else /* !CONFIG_SFC_SIENA_SRIOV */
67static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
68{
69 return false;
70}
71#endif /* CONFIG_SFC_SIENA_SRIOV */
72
73void efx_siena_sriov_probe(struct efx_nic *efx);
74void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
75void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
76void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event);
77void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
78
79#endif /* SIENA_SRIOV_H */
80

source code of linux/drivers/net/ethernet/sfc/siena/siena_sriov.h