1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright(c) 2009 - 2018 Intel Corporation. */
3 
4 /* Linux PRO/1000 Ethernet Driver main header file */
5 
6 #ifndef _IGBVF_H_
7 #define _IGBVF_H_
8 
9 #include <linux/types.h>
10 #include <linux/timer.h>
11 #include <linux/io.h>
12 #include <linux/netdevice.h>
13 #include <linux/if_vlan.h>
14 
15 #include "vf.h"
16 
17 /* Forward declarations */
18 struct igbvf_info;
19 struct igbvf_adapter;
20 
21 /* Interrupt defines */
22 #define IGBVF_START_ITR		488 /* ~8000 ints/sec */
23 #define IGBVF_4K_ITR		980
24 #define IGBVF_20K_ITR		196
25 #define IGBVF_70K_ITR		56
26 
27 enum latency_range {
28 	lowest_latency = 0,
29 	low_latency = 1,
30 	bulk_latency = 2,
31 	latency_invalid = 255
32 };
33 
34 /* Interrupt modes, as used by the IntMode parameter */
35 #define IGBVF_INT_MODE_LEGACY	0
36 #define IGBVF_INT_MODE_MSI	1
37 #define IGBVF_INT_MODE_MSIX	2
38 
39 /* Tx/Rx descriptor defines */
40 #define IGBVF_DEFAULT_TXD	256
41 #define IGBVF_MAX_TXD		4096
42 #define IGBVF_MIN_TXD		64
43 
44 #define IGBVF_DEFAULT_RXD	256
45 #define IGBVF_MAX_RXD		4096
46 #define IGBVF_MIN_RXD		64
47 
48 #define IGBVF_MIN_ITR_USECS	10 /* 100000 irq/sec */
49 #define IGBVF_MAX_ITR_USECS	10000 /* 100    irq/sec */
50 
51 /* RX descriptor control thresholds.
52  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
53  *	   descriptors available in its onboard memory.
54  *	   Setting this to 0 disables RX descriptor prefetch.
55  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
56  *	   available in host memory.
57  *	   If PTHRESH is 0, this should also be 0.
58  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
59  *	   descriptors until either it has this many to write back, or the
60  *	   ITR timer expires.
61  */
62 #define IGBVF_RX_PTHRESH	16
63 #define IGBVF_RX_HTHRESH	8
64 #define IGBVF_RX_WTHRESH	1
65 
66 /* this is the size past which hardware will drop packets when setting LPE=0 */
67 #define MAXIMUM_ETHERNET_VLAN_SIZE	1522
68 
69 #define IGBVF_FC_PAUSE_TIME	0x0680 /* 858 usec */
70 
71 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
72 #define IGBVF_TX_QUEUE_WAKE	32
73 /* How many Rx Buffers do we bundle into one write to the hardware ? */
74 #define IGBVF_RX_BUFFER_WRITE	16 /* Must be power of 2 */
75 
76 #define AUTO_ALL_MODES		0
77 #define IGBVF_EEPROM_APME	0x0400
78 
79 #define IGBVF_MNG_VLAN_NONE	(-1)
80 
81 #define IGBVF_MAX_MAC_FILTERS	3
82 
83 /* Number of packet split data buffers (not including the header buffer) */
84 #define PS_PAGE_BUFFERS		(MAX_PS_BUFFERS - 1)
85 
86 enum igbvf_boards {
87 	board_vf,
88 	board_i350_vf,
89 };
90 
91 struct igbvf_queue_stats {
92 	u64 packets;
93 	u64 bytes;
94 };
95 
96 /* wrappers around a pointer to a socket buffer,
97  * so a DMA handle can be stored along with the buffer
98  */
99 struct igbvf_buffer {
100 	dma_addr_t dma;
101 	struct sk_buff *skb;
102 	union {
103 		/* Tx */
104 		struct {
105 			unsigned long time_stamp;
106 			union e1000_adv_tx_desc *next_to_watch;
107 			u16 length;
108 			u16 mapped_as_page;
109 		};
110 		/* Rx */
111 		struct {
112 			struct page *page;
113 			u64 page_dma;
114 			unsigned int page_offset;
115 		};
116 	};
117 };
118 
119 union igbvf_desc {
120 	union e1000_adv_rx_desc rx_desc;
121 	union e1000_adv_tx_desc tx_desc;
122 	struct e1000_adv_tx_context_desc tx_context_desc;
123 };
124 
125 struct igbvf_ring {
126 	struct igbvf_adapter *adapter;  /* backlink */
127 	union igbvf_desc *desc;	/* pointer to ring memory  */
128 	dma_addr_t dma;		/* phys address of ring    */
129 	unsigned int size;	/* length of ring in bytes */
130 	unsigned int count;	/* number of desc. in ring */
131 
132 	u16 next_to_use;
133 	u16 next_to_clean;
134 
135 	u16 head;
136 	u16 tail;
137 
138 	/* array of buffer information structs */
139 	struct igbvf_buffer *buffer_info;
140 	struct napi_struct napi;
141 
142 	char name[IFNAMSIZ + 5];
143 	u32 eims_value;
144 	u32 itr_val;
145 	enum latency_range itr_range;
146 	u16 itr_register;
147 	int set_itr;
148 
149 	struct sk_buff *rx_skb_top;
150 
151 	struct igbvf_queue_stats stats;
152 };
153 
154 /* board specific private data structure */
155 struct igbvf_adapter {
156 	struct timer_list watchdog_timer;
157 	struct timer_list blink_timer;
158 
159 	struct work_struct reset_task;
160 	struct work_struct watchdog_task;
161 
162 	const struct igbvf_info *ei;
163 
164 	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
165 	u32 bd_number;
166 	u32 rx_buffer_len;
167 	u32 polling_interval;
168 	u16 mng_vlan_id;
169 	u16 link_speed;
170 	u16 link_duplex;
171 
172 	spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
173 
174 	/* track device up/down/testing state */
175 	unsigned long state;
176 
177 	/* Interrupt Throttle Rate */
178 	u32 requested_itr; /* ints/sec or adaptive */
179 	u32 current_itr; /* Actual ITR register value, not ints/sec */
180 
181 	/* Tx */
182 	struct igbvf_ring *tx_ring /* One per active queue */
183 	____cacheline_aligned_in_smp;
184 
185 	unsigned int restart_queue;
186 	u32 txd_cmd;
187 
188 	u32 tx_int_delay;
189 	u32 tx_abs_int_delay;
190 
191 	unsigned int total_tx_bytes;
192 	unsigned int total_tx_packets;
193 	unsigned int total_rx_bytes;
194 	unsigned int total_rx_packets;
195 
196 	/* Tx stats */
197 	u32 tx_timeout_count;
198 	u32 tx_fifo_head;
199 	u32 tx_head_addr;
200 	u32 tx_fifo_size;
201 	u32 tx_dma_failed;
202 
203 	/* Rx */
204 	struct igbvf_ring *rx_ring;
205 
206 	u32 rx_int_delay;
207 	u32 rx_abs_int_delay;
208 
209 	/* Rx stats */
210 	u64 hw_csum_err;
211 	u64 hw_csum_good;
212 	u64 rx_hdr_split;
213 	u32 alloc_rx_buff_failed;
214 	u32 rx_dma_failed;
215 
216 	unsigned int rx_ps_hdr_size;
217 	u32 max_frame_size;
218 	u32 min_frame_size;
219 
220 	/* OS defined structs */
221 	struct net_device *netdev;
222 	struct pci_dev *pdev;
223 	spinlock_t stats_lock; /* prevent concurrent stats updates */
224 
225 	/* structs defined in e1000_hw.h */
226 	struct e1000_hw hw;
227 
228 	/* The VF counters don't clear on read so we have to get a base
229 	 * count on driver start up and always subtract that base on
230 	 * the first update, thus the flag..
231 	 */
232 	struct e1000_vf_stats stats;
233 	u64 zero_base;
234 
235 	struct igbvf_ring test_tx_ring;
236 	struct igbvf_ring test_rx_ring;
237 	u32 test_icr;
238 
239 	u32 msg_enable;
240 	struct msix_entry *msix_entries;
241 	int int_mode;
242 	u32 eims_enable_mask;
243 	u32 eims_other;
244 	u32 int_counter0;
245 	u32 int_counter1;
246 
247 	u32 eeprom_wol;
248 	u32 wol;
249 	u32 pba;
250 
251 	bool fc_autoneg;
252 
253 	unsigned long led_status;
254 
255 	unsigned int flags;
256 	unsigned long last_reset;
257 };
258 
259 struct igbvf_info {
260 	enum e1000_mac_type	mac;
261 	unsigned int		flags;
262 	u32			pba;
263 	void			(*init_ops)(struct e1000_hw *);
264 	s32			(*get_variants)(struct igbvf_adapter *);
265 };
266 
267 /* hardware capability, feature, and workaround flags */
268 #define IGBVF_FLAG_RX_CSUM_DISABLED	BIT(0)
269 #define IGBVF_FLAG_RX_LB_VLAN_BSWAP	BIT(1)
270 #define IGBVF_RX_DESC_ADV(R, i)     \
271 	(&((((R).desc))[i].rx_desc))
272 #define IGBVF_TX_DESC_ADV(R, i)     \
273 	(&((((R).desc))[i].tx_desc))
274 #define IGBVF_TX_CTXTDESC_ADV(R, i) \
275 	(&((((R).desc))[i].tx_context_desc))
276 
277 enum igbvf_state_t {
278 	__IGBVF_TESTING,
279 	__IGBVF_RESETTING,
280 	__IGBVF_DOWN
281 };
282 
283 extern char igbvf_driver_name[];
284 
285 void igbvf_check_options(struct igbvf_adapter *);
286 void igbvf_set_ethtool_ops(struct net_device *);
287 
288 int igbvf_up(struct igbvf_adapter *);
289 void igbvf_down(struct igbvf_adapter *);
290 void igbvf_reinit_locked(struct igbvf_adapter *);
291 int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
292 int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
293 void igbvf_free_rx_resources(struct igbvf_ring *);
294 void igbvf_free_tx_resources(struct igbvf_ring *);
295 void igbvf_update_stats(struct igbvf_adapter *);
296 
297 extern unsigned int copybreak;
298 
299 #endif /* _IGBVF_H_ */
300