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1/*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2012 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28/* Linux PRO/1000 Ethernet Driver main header file */
29
30#ifndef _IGBVF_H_
31#define _IGBVF_H_
32
33#include <linux/types.h>
34#include <linux/timer.h>
35#include <linux/io.h>
36#include <linux/netdevice.h>
37#include <linux/if_vlan.h>
38
39#include "vf.h"
40
41/* Forward declarations */
42struct igbvf_info;
43struct igbvf_adapter;
44
45/* Interrupt defines */
46#define IGBVF_START_ITR 488 /* ~8000 ints/sec */
47#define IGBVF_4K_ITR 980
48#define IGBVF_20K_ITR 196
49#define IGBVF_70K_ITR 56
50
51enum latency_range {
52 lowest_latency = 0,
53 low_latency = 1,
54 bulk_latency = 2,
55 latency_invalid = 255
56};
57
58
59/* Interrupt modes, as used by the IntMode parameter */
60#define IGBVF_INT_MODE_LEGACY 0
61#define IGBVF_INT_MODE_MSI 1
62#define IGBVF_INT_MODE_MSIX 2
63
64/* Tx/Rx descriptor defines */
65#define IGBVF_DEFAULT_TXD 256
66#define IGBVF_MAX_TXD 4096
67#define IGBVF_MIN_TXD 80
68
69#define IGBVF_DEFAULT_RXD 256
70#define IGBVF_MAX_RXD 4096
71#define IGBVF_MIN_RXD 80
72
73#define IGBVF_MIN_ITR_USECS 10 /* 100000 irq/sec */
74#define IGBVF_MAX_ITR_USECS 10000 /* 100 irq/sec */
75
76/* RX descriptor control thresholds.
77 * PTHRESH - MAC will consider prefetch if it has fewer than this number of
78 * descriptors available in its onboard memory.
79 * Setting this to 0 disables RX descriptor prefetch.
80 * HTHRESH - MAC will only prefetch if there are at least this many descriptors
81 * available in host memory.
82 * If PTHRESH is 0, this should also be 0.
83 * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
84 * descriptors until either it has this many to write back, or the
85 * ITR timer expires.
86 */
87#define IGBVF_RX_PTHRESH 16
88#define IGBVF_RX_HTHRESH 8
89#define IGBVF_RX_WTHRESH 1
90
91/* this is the size past which hardware will drop packets when setting LPE=0 */
92#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
93
94#define IGBVF_FC_PAUSE_TIME 0x0680 /* 858 usec */
95
96/* How many Tx Descriptors do we need to call netif_wake_queue ? */
97#define IGBVF_TX_QUEUE_WAKE 32
98/* How many Rx Buffers do we bundle into one write to the hardware ? */
99#define IGBVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
100
101#define AUTO_ALL_MODES 0
102#define IGBVF_EEPROM_APME 0x0400
103
104#define IGBVF_MNG_VLAN_NONE (-1)
105
106/* Number of packet split data buffers (not including the header buffer) */
107#define PS_PAGE_BUFFERS (MAX_PS_BUFFERS - 1)
108
109enum igbvf_boards {
110 board_vf,
111 board_i350_vf,
112};
113
114struct igbvf_queue_stats {
115 u64 packets;
116 u64 bytes;
117};
118
119/*
120 * wrappers around a pointer to a socket buffer,
121 * so a DMA handle can be stored along with the buffer
122 */
123struct igbvf_buffer {
124 dma_addr_t dma;
125 struct sk_buff *skb;
126 union {
127 /* Tx */
128 struct {
129 unsigned long time_stamp;
130 u16 length;
131 u16 next_to_watch;
132 u16 mapped_as_page;
133 };
134 /* Rx */
135 struct {
136 struct page *page;
137 u64 page_dma;
138 unsigned int page_offset;
139 };
140 };
141};
142
143union igbvf_desc {
144 union e1000_adv_rx_desc rx_desc;
145 union e1000_adv_tx_desc tx_desc;
146 struct e1000_adv_tx_context_desc tx_context_desc;
147};
148
149struct igbvf_ring {
150 struct igbvf_adapter *adapter; /* backlink */
151 union igbvf_desc *desc; /* pointer to ring memory */
152 dma_addr_t dma; /* phys address of ring */
153 unsigned int size; /* length of ring in bytes */
154 unsigned int count; /* number of desc. in ring */
155
156 u16 next_to_use;
157 u16 next_to_clean;
158
159 u16 head;
160 u16 tail;
161
162 /* array of buffer information structs */
163 struct igbvf_buffer *buffer_info;
164 struct napi_struct napi;
165
166 char name[IFNAMSIZ + 5];
167 u32 eims_value;
168 u32 itr_val;
169 enum latency_range itr_range;
170 u16 itr_register;
171 int set_itr;
172
173 struct sk_buff *rx_skb_top;
174
175 struct igbvf_queue_stats stats;
176};
177
178/* board specific private data structure */
179struct igbvf_adapter {
180 struct timer_list watchdog_timer;
181 struct timer_list blink_timer;
182
183 struct work_struct reset_task;
184 struct work_struct watchdog_task;
185
186 const struct igbvf_info *ei;
187
188 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
189 u32 bd_number;
190 u32 rx_buffer_len;
191 u32 polling_interval;
192 u16 mng_vlan_id;
193 u16 link_speed;
194 u16 link_duplex;
195
196 spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
197
198 /* track device up/down/testing state */
199 unsigned long state;
200
201 /* Interrupt Throttle Rate */
202 u32 requested_itr; /* ints/sec or adaptive */
203 u32 current_itr; /* Actual ITR register value, not ints/sec */
204
205 /*
206 * Tx
207 */
208 struct igbvf_ring *tx_ring /* One per active queue */
209 ____cacheline_aligned_in_smp;
210
211 unsigned int restart_queue;
212 u32 txd_cmd;
213
214 u32 tx_int_delay;
215 u32 tx_abs_int_delay;
216
217 unsigned int total_tx_bytes;
218 unsigned int total_tx_packets;
219 unsigned int total_rx_bytes;
220 unsigned int total_rx_packets;
221
222 /* Tx stats */
223 u32 tx_timeout_count;
224 u32 tx_fifo_head;
225 u32 tx_head_addr;
226 u32 tx_fifo_size;
227 u32 tx_dma_failed;
228
229 /*
230 * Rx
231 */
232 struct igbvf_ring *rx_ring;
233
234 u32 rx_int_delay;
235 u32 rx_abs_int_delay;
236
237 /* Rx stats */
238 u64 hw_csum_err;
239 u64 hw_csum_good;
240 u64 rx_hdr_split;
241 u32 alloc_rx_buff_failed;
242 u32 rx_dma_failed;
243
244 unsigned int rx_ps_hdr_size;
245 u32 max_frame_size;
246 u32 min_frame_size;
247
248 /* OS defined structs */
249 struct net_device *netdev;
250 struct pci_dev *pdev;
251 struct net_device_stats net_stats;
252 spinlock_t stats_lock; /* prevent concurrent stats updates */
253
254 /* structs defined in e1000_hw.h */
255 struct e1000_hw hw;
256
257 /* The VF counters don't clear on read so we have to get a base
258 * count on driver start up and always subtract that base on
259 * on the first update, thus the flag..
260 */
261 struct e1000_vf_stats stats;
262 u64 zero_base;
263
264 struct igbvf_ring test_tx_ring;
265 struct igbvf_ring test_rx_ring;
266 u32 test_icr;
267
268 u32 msg_enable;
269 struct msix_entry *msix_entries;
270 int int_mode;
271 u32 eims_enable_mask;
272 u32 eims_other;
273 u32 int_counter0;
274 u32 int_counter1;
275
276 u32 eeprom_wol;
277 u32 wol;
278 u32 pba;
279
280 bool fc_autoneg;
281
282 unsigned long led_status;
283
284 unsigned int flags;
285 unsigned long last_reset;
286};
287
288struct igbvf_info {
289 enum e1000_mac_type mac;
290 unsigned int flags;
291 u32 pba;
292 void (*init_ops)(struct e1000_hw *);
293 s32 (*get_variants)(struct igbvf_adapter *);
294};
295
296/* hardware capability, feature, and workaround flags */
297#define IGBVF_FLAG_RX_CSUM_DISABLED (1 << 0)
298
299#define IGBVF_RX_DESC_ADV(R, i) \
300 (&((((R).desc))[i].rx_desc))
301#define IGBVF_TX_DESC_ADV(R, i) \
302 (&((((R).desc))[i].tx_desc))
303#define IGBVF_TX_CTXTDESC_ADV(R, i) \
304 (&((((R).desc))[i].tx_context_desc))
305
306enum igbvf_state_t {
307 __IGBVF_TESTING,
308 __IGBVF_RESETTING,
309 __IGBVF_DOWN
310};
311
312extern char igbvf_driver_name[];
313extern const char igbvf_driver_version[];
314
315extern void igbvf_check_options(struct igbvf_adapter *);
316extern void igbvf_set_ethtool_ops(struct net_device *);
317
318extern int igbvf_up(struct igbvf_adapter *);
319extern void igbvf_down(struct igbvf_adapter *);
320extern void igbvf_reinit_locked(struct igbvf_adapter *);
321extern int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
322extern int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
323extern void igbvf_free_rx_resources(struct igbvf_ring *);
324extern void igbvf_free_tx_resources(struct igbvf_ring *);
325extern void igbvf_update_stats(struct igbvf_adapter *);
326
327extern unsigned int copybreak;
328
329#endif /* _IGBVF_H_ */