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