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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6
7#ifndef _ENIC_H_
8#define _ENIC_H_
9
10#include "vnic_enet.h"
11#include "vnic_dev.h"
12#include "vnic_wq.h"
13#include "vnic_rq.h"
14#include "vnic_cq.h"
15#include "vnic_intr.h"
16#include "vnic_stats.h"
17#include "vnic_nic.h"
18#include "vnic_rss.h"
19#include <linux/irq.h>
20
21#define DRV_NAME "enic"
22#define DRV_DESCRIPTION "Cisco VIC Ethernet NIC Driver"
23
24#define ENIC_BARS_MAX 6
25
26#define ENIC_WQ_MAX 8
27#define ENIC_RQ_MAX 8
28#define ENIC_CQ_MAX (ENIC_WQ_MAX + ENIC_RQ_MAX)
29#define ENIC_INTR_MAX (ENIC_CQ_MAX + 2)
30
31#define ENIC_WQ_NAPI_BUDGET 256
32
33#define ENIC_AIC_LARGE_PKT_DIFF 3
34
35struct enic_msix_entry {
36 int requested;
37 char devname[IFNAMSIZ + 8];
38 irqreturn_t (*isr)(int, void *);
39 void *devid;
40 cpumask_var_t affinity_mask;
41};
42
43/* Store only the lower range. Higher range is given by fw. */
44struct enic_intr_mod_range {
45 u32 small_pkt_range_start;
46 u32 large_pkt_range_start;
47};
48
49struct enic_intr_mod_table {
50 u32 rx_rate;
51 u32 range_percent;
52};
53
54#define ENIC_MAX_LINK_SPEEDS 3
55#define ENIC_LINK_SPEED_10G 10000
56#define ENIC_LINK_SPEED_4G 4000
57#define ENIC_LINK_40G_INDEX 2
58#define ENIC_LINK_10G_INDEX 1
59#define ENIC_LINK_4G_INDEX 0
60#define ENIC_RX_COALESCE_RANGE_END 125
61#define ENIC_AIC_TS_BREAK 100
62
63struct enic_rx_coal {
64 u32 small_pkt_range_start;
65 u32 large_pkt_range_start;
66 u32 range_end;
67 u32 use_adaptive_rx_coalesce;
68};
69
70/* priv_flags */
71#define ENIC_SRIOV_ENABLED (1 << 0)
72
73/* enic port profile set flags */
74#define ENIC_PORT_REQUEST_APPLIED (1 << 0)
75#define ENIC_SET_REQUEST (1 << 1)
76#define ENIC_SET_NAME (1 << 2)
77#define ENIC_SET_INSTANCE (1 << 3)
78#define ENIC_SET_HOST (1 << 4)
79
80struct enic_port_profile {
81 u32 set;
82 u8 request;
83 char name[PORT_PROFILE_MAX];
84 u8 instance_uuid[PORT_UUID_MAX];
85 u8 host_uuid[PORT_UUID_MAX];
86 u8 vf_mac[ETH_ALEN];
87 u8 mac_addr[ETH_ALEN];
88};
89
90/* enic_rfs_fltr_node - rfs filter node in hash table
91 * @@keys: IPv4 5 tuple
92 * @flow_id: flow_id of clsf filter provided by kernel
93 * @fltr_id: filter id of clsf filter returned by adaptor
94 * @rq_id: desired rq index
95 * @node: hlist_node
96 */
97struct enic_rfs_fltr_node {
98 struct flow_keys keys;
99 u32 flow_id;
100 u16 fltr_id;
101 u16 rq_id;
102 struct hlist_node node;
103};
104
105/* enic_rfs_flw_tbl - rfs flow table
106 * @max: Maximum number of filters vNIC supports
107 * @free: Number of free filters available
108 * @toclean: hash table index to clean next
109 * @ht_head: hash table list head
110 * @lock: spin lock
111 * @rfs_may_expire: timer function for enic_rps_may_expire_flow
112 */
113struct enic_rfs_flw_tbl {
114 u16 max;
115 int free;
116
117#define ENIC_RFS_FLW_BITSHIFT (10)
118#define ENIC_RFS_FLW_MASK ((1 << ENIC_RFS_FLW_BITSHIFT) - 1)
119 u16 toclean:ENIC_RFS_FLW_BITSHIFT;
120 struct hlist_head ht_head[1 << ENIC_RFS_FLW_BITSHIFT];
121 spinlock_t lock;
122 struct timer_list rfs_may_expire;
123};
124
125struct vxlan_offload {
126 u16 vxlan_udp_port_number;
127 u8 patch_level;
128 u8 flags;
129};
130
131/* Per-instance private data structure */
132struct enic {
133 struct net_device *netdev;
134 struct pci_dev *pdev;
135 struct vnic_enet_config config;
136 struct vnic_dev_bar bar[ENIC_BARS_MAX];
137 struct vnic_dev *vdev;
138 struct timer_list notify_timer;
139 struct work_struct reset;
140 struct work_struct tx_hang_reset;
141 struct work_struct change_mtu_work;
142 struct msix_entry msix_entry[ENIC_INTR_MAX];
143 struct enic_msix_entry msix[ENIC_INTR_MAX];
144 u32 msg_enable;
145 spinlock_t devcmd_lock;
146 u8 mac_addr[ETH_ALEN];
147 unsigned int flags;
148 unsigned int priv_flags;
149 unsigned int mc_count;
150 unsigned int uc_count;
151 u32 port_mtu;
152 struct enic_rx_coal rx_coalesce_setting;
153 u32 rx_coalesce_usecs;
154 u32 tx_coalesce_usecs;
155#ifdef CONFIG_PCI_IOV
156 u16 num_vfs;
157#endif
158 spinlock_t enic_api_lock;
159 bool enic_api_busy;
160 struct enic_port_profile *pp;
161
162 /* work queue cache line section */
163 ____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
164 spinlock_t wq_lock[ENIC_WQ_MAX];
165 unsigned int wq_count;
166 u16 loop_enable;
167 u16 loop_tag;
168
169 /* receive queue cache line section */
170 ____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
171 unsigned int rq_count;
172 struct vxlan_offload vxlan;
173 u64 rq_truncated_pkts;
174 u64 rq_bad_fcs;
175 struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];
176
177 /* interrupt resource cache line section */
178 ____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];
179 unsigned int intr_count;
180 u32 __iomem *legacy_pba; /* memory-mapped */
181
182 /* completion queue cache line section */
183 ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
184 unsigned int cq_count;
185 struct enic_rfs_flw_tbl rfs_h;
186 u32 rx_copybreak;
187 u8 rss_key[ENIC_RSS_LEN];
188 struct vnic_gen_stats gen_stats;
189};
190
191static inline struct net_device *vnic_get_netdev(struct vnic_dev *vdev)
192{
193 struct enic *enic = vdev->priv;
194
195 return enic->netdev;
196}
197
198/* wrappers function for kernel log
199 */
200#define vdev_err(vdev, fmt, ...) \
201 dev_err(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
202#define vdev_warn(vdev, fmt, ...) \
203 dev_warn(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
204#define vdev_info(vdev, fmt, ...) \
205 dev_info(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
206
207#define vdev_neterr(vdev, fmt, ...) \
208 netdev_err(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
209#define vdev_netwarn(vdev, fmt, ...) \
210 netdev_warn(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
211#define vdev_netinfo(vdev, fmt, ...) \
212 netdev_info(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
213
214static inline struct device *enic_get_dev(struct enic *enic)
215{
216 return &(enic->pdev->dev);
217}
218
219static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
220{
221 return rq;
222}
223
224static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
225{
226 return enic->rq_count + wq;
227}
228
229static inline unsigned int enic_msix_rq_intr(struct enic *enic,
230 unsigned int rq)
231{
232 return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
233}
234
235static inline unsigned int enic_msix_wq_intr(struct enic *enic,
236 unsigned int wq)
237{
238 return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
239}
240
241static inline unsigned int enic_msix_err_intr(struct enic *enic)
242{
243 return enic->rq_count + enic->wq_count;
244}
245
246#define ENIC_LEGACY_IO_INTR 0
247#define ENIC_LEGACY_ERR_INTR 1
248#define ENIC_LEGACY_NOTIFY_INTR 2
249
250static inline unsigned int enic_msix_notify_intr(struct enic *enic)
251{
252 return enic->rq_count + enic->wq_count + 1;
253}
254
255static inline bool enic_is_err_intr(struct enic *enic, int intr)
256{
257 switch (vnic_dev_get_intr_mode(enic->vdev)) {
258 case VNIC_DEV_INTR_MODE_INTX:
259 return intr == ENIC_LEGACY_ERR_INTR;
260 case VNIC_DEV_INTR_MODE_MSIX:
261 return intr == enic_msix_err_intr(enic);
262 case VNIC_DEV_INTR_MODE_MSI:
263 default:
264 return false;
265 }
266}
267
268static inline bool enic_is_notify_intr(struct enic *enic, int intr)
269{
270 switch (vnic_dev_get_intr_mode(enic->vdev)) {
271 case VNIC_DEV_INTR_MODE_INTX:
272 return intr == ENIC_LEGACY_NOTIFY_INTR;
273 case VNIC_DEV_INTR_MODE_MSIX:
274 return intr == enic_msix_notify_intr(enic);
275 case VNIC_DEV_INTR_MODE_MSI:
276 default:
277 return false;
278 }
279}
280
281static inline int enic_dma_map_check(struct enic *enic, dma_addr_t dma_addr)
282{
283 if (unlikely(dma_mapping_error(&enic->pdev->dev, dma_addr))) {
284 net_warn_ratelimited("%s: PCI dma mapping failed!\n",
285 enic->netdev->name);
286 enic->gen_stats.dma_map_error++;
287
288 return -ENOMEM;
289 }
290
291 return 0;
292}
293
294void enic_reset_addr_lists(struct enic *enic);
295int enic_sriov_enabled(struct enic *enic);
296int enic_is_valid_vf(struct enic *enic, int vf);
297int enic_is_dynamic(struct enic *enic);
298void enic_set_ethtool_ops(struct net_device *netdev);
299int __enic_set_rsskey(struct enic *enic);
300
301#endif /* _ENIC_H_ */