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 
41 int efx_siena_sriov_configure(struct efx_nic *efx, int num_vfs);
42 int efx_siena_sriov_init(struct efx_nic *efx);
43 void efx_siena_sriov_fini(struct efx_nic *efx);
44 int efx_siena_sriov_mac_address_changed(struct efx_nic *efx);
45 bool efx_siena_sriov_wanted(struct efx_nic *efx);
46 void efx_siena_sriov_reset(struct efx_nic *efx);
47 void efx_siena_sriov_flr(struct efx_nic *efx, unsigned flr);
48 
49 int efx_siena_sriov_set_vf_mac(struct efx_nic *efx, int vf, const u8 *mac);
50 int efx_siena_sriov_set_vf_vlan(struct efx_nic *efx, int vf,
51 				u16 vlan, u8 qos);
52 int efx_siena_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf,
53 				    bool spoofchk);
54 int 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 
59 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
60 {
61 	return efx->vf_init_count != 0;
62 }
63 
64 int efx_init_sriov(void);
65 void efx_fini_sriov(void);
66 #else /* !CONFIG_SFC_SIENA_SRIOV */
67 static inline bool efx_siena_sriov_enabled(struct efx_nic *efx)
68 {
69 	return false;
70 }
71 #endif /* CONFIG_SFC_SIENA_SRIOV */
72 
73 void efx_siena_sriov_probe(struct efx_nic *efx);
74 void efx_siena_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
75 void efx_siena_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
76 void efx_siena_sriov_event(struct efx_channel *channel, efx_qword_t *event);
77 void efx_siena_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
78 
79 #endif /* SIENA_SRIOV_H */
80