1 /*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 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
38
39 #include "vf.h"
40
41 /* Forward declarations */
42 struct igbvf_info;
43 struct igbvf_adapter;
44
45 /* Interrupt defines */
46 #define IGBVF_START_ITR 648 /* ~6000 ints/sec */
47
48 /* Interrupt modes, as used by the IntMode parameter */
49 #define IGBVF_INT_MODE_LEGACY 0
50 #define IGBVF_INT_MODE_MSI 1
51 #define IGBVF_INT_MODE_MSIX 2
52
53 /* Tx/Rx descriptor defines */
54 #define IGBVF_DEFAULT_TXD 256
55 #define IGBVF_MAX_TXD 4096
56 #define IGBVF_MIN_TXD 80
57
58 #define IGBVF_DEFAULT_RXD 256
59 #define IGBVF_MAX_RXD 4096
60 #define IGBVF_MIN_RXD 80
61
62 #define IGBVF_MIN_ITR_USECS 10 /* 100000 irq/sec */
63 #define IGBVF_MAX_ITR_USECS 10000 /* 100 irq/sec */
64
65 /* RX descriptor control thresholds.
66 * PTHRESH - MAC will consider prefetch if it has fewer than this number of
67 * descriptors available in its onboard memory.
68 * Setting this to 0 disables RX descriptor prefetch.
69 * HTHRESH - MAC will only prefetch if there are at least this many descriptors
70 * available in host memory.
71 * If PTHRESH is 0, this should also be 0.
72 * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
73 * descriptors until either it has this many to write back, or the
74 * ITR timer expires.
75 */
76 #define IGBVF_RX_PTHRESH 16
77 #define IGBVF_RX_HTHRESH 8
78 #define IGBVF_RX_WTHRESH 1
79
80 /* this is the size past which hardware will drop packets when setting LPE=0 */
81 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
82
83 #define IGBVF_FC_PAUSE_TIME 0x0680 /* 858 usec */
84
85 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
86 #define IGBVF_TX_QUEUE_WAKE 32
87 /* How many Rx Buffers do we bundle into one write to the hardware ? */
88 #define IGBVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
89
90 #define AUTO_ALL_MODES 0
91 #define IGBVF_EEPROM_APME 0x0400
92
93 #define IGBVF_MNG_VLAN_NONE (-1)
94
95 /* Number of packet split data buffers (not including the header buffer) */
96 #define PS_PAGE_BUFFERS (MAX_PS_BUFFERS - 1)
97
98 enum igbvf_boards {
99 board_vf,
100 };
101
102 struct igbvf_queue_stats {
103 u64 packets;
104 u64 bytes;
105 };
106
107 /*
108 * wrappers around a pointer to a socket buffer,
109 * so a DMA handle can be stored along with the buffer
110 */
111 struct igbvf_buffer {
112 dma_addr_t dma;
113 struct sk_buff *skb;
114 union {
115 /* Tx */
116 struct {
117 unsigned long time_stamp;
118 u16 length;
119 u16 next_to_watch;
120 };
121 /* Rx */
122 struct {
123 struct page *page;
124 u64 page_dma;
125 unsigned int page_offset;
126 };
127 };
128 struct page *page;
129 };
130
131 union igbvf_desc {
132 union e1000_adv_rx_desc rx_desc;
133 union e1000_adv_tx_desc tx_desc;
134 struct e1000_adv_tx_context_desc tx_context_desc;
135 };
136
137 struct igbvf_ring {
138 struct igbvf_adapter *adapter; /* backlink */
139 union igbvf_desc *desc; /* pointer to ring memory */
140 dma_addr_t dma; /* phys address of ring */
141 unsigned int size; /* length of ring in bytes */
142 unsigned int count; /* number of desc. in ring */
143
144 u16 next_to_use;
145 u16 next_to_clean;
146
147 u16 head;
148 u16 tail;
149
150 /* array of buffer information structs */
151 struct igbvf_buffer *buffer_info;
152 struct napi_struct napi;
153
154 char name[IFNAMSIZ + 5];
155 u32 eims_value;
156 u32 itr_val;
157 u16 itr_register;
158 int set_itr;
159
160 struct sk_buff *rx_skb_top;
161
162 struct igbvf_queue_stats stats;
163 };
164
165 /* board specific private data structure */
166 struct igbvf_adapter {
167 struct timer_list watchdog_timer;
168 struct timer_list blink_timer;
169
170 struct work_struct reset_task;
171 struct work_struct watchdog_task;
172
173 const struct igbvf_info *ei;
174
175 struct vlan_group *vlgrp;
176 u32 bd_number;
177 u32 rx_buffer_len;
178 u32 polling_interval;
179 u16 mng_vlan_id;
180 u16 link_speed;
181 u16 link_duplex;
182
183 spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
184
185 /* track device up/down/testing state */
186 unsigned long state;
187
188 /* Interrupt Throttle Rate */
189 u32 itr;
190 u32 itr_setting;
191 u16 tx_itr;
192 u16 rx_itr;
193
194 /*
195 * Tx
196 */
197 struct igbvf_ring *tx_ring /* One per active queue */
198 ____cacheline_aligned_in_smp;
199
200 unsigned long tx_queue_len;
201 unsigned int restart_queue;
202 u32 txd_cmd;
203
204 bool detect_tx_hung;
205 u8 tx_timeout_factor;
206
207 u32 tx_int_delay;
208 u32 tx_abs_int_delay;
209
210 unsigned int total_tx_bytes;
211 unsigned int total_tx_packets;
212 unsigned int total_rx_bytes;
213 unsigned int total_rx_packets;
214
215 /* Tx stats */
216 u32 tx_timeout_count;
217 u32 tx_fifo_head;
218 u32 tx_head_addr;
219 u32 tx_fifo_size;
220 u32 tx_dma_failed;
221
222 /*
223 * Rx
224 */
225 struct igbvf_ring *rx_ring;
226
227 u32 rx_int_delay;
228 u32 rx_abs_int_delay;
229
230 /* Rx stats */
231 u64 hw_csum_err;
232 u64 hw_csum_good;
233 u64 rx_hdr_split;
234 u32 alloc_rx_buff_failed;
235 u32 rx_dma_failed;
236
237 unsigned int rx_ps_hdr_size;
238 u32 max_frame_size;
239 u32 min_frame_size;
240
241 /* OS defined structs */
242 struct net_device *netdev;
243 struct pci_dev *pdev;
244 struct net_device_stats net_stats;
245 spinlock_t stats_lock; /* prevent concurrent stats updates */
246
247 /* structs defined in e1000_hw.h */
248 struct e1000_hw hw;
249
250 /* The VF counters don't clear on read so we have to get a base
251 * count on driver start up and always subtract that base on
252 * on the first update, thus the flag..
253 */
254 struct e1000_vf_stats stats;
255 u64 zero_base;
256
257 struct igbvf_ring test_tx_ring;
258 struct igbvf_ring test_rx_ring;
259 u32 test_icr;
260
261 u32 msg_enable;
262 struct msix_entry *msix_entries;
263 int int_mode;
264 u32 eims_enable_mask;
265 u32 eims_other;
266 u32 int_counter0;
267 u32 int_counter1;
268
269 u32 eeprom_wol;
270 u32 wol;
271 u32 pba;
272
273 bool fc_autoneg;
274
275 unsigned long led_status;
276
277 unsigned int flags;
278 };
279
280 struct igbvf_info {
281 enum e1000_mac_type mac;
282 unsigned int flags;
283 u32 pba;
284 void (*init_ops)(struct e1000_hw *);
285 s32 (*get_variants)(struct igbvf_adapter *);
286 };
287
288 /* hardware capability, feature, and workaround flags */
289 #define IGBVF_FLAG_RX_CSUM_DISABLED (1 << 0)
290
291 #define IGBVF_RX_DESC_ADV(R, i) \
292 (&((((R).desc))[i].rx_desc))
293 #define IGBVF_TX_DESC_ADV(R, i) \
294 (&((((R).desc))[i].tx_desc))
295 #define IGBVF_TX_CTXTDESC_ADV(R, i) \
296 (&((((R).desc))[i].tx_context_desc))
297
298 enum igbvf_state_t {
299 __IGBVF_TESTING,
300 __IGBVF_RESETTING,
301 __IGBVF_DOWN
302 };
303
304 enum latency_range {
305 lowest_latency = 0,
306 low_latency = 1,
307 bulk_latency = 2,
308 latency_invalid = 255
309 };
310
311 extern char igbvf_driver_name[];
312 extern const char igbvf_driver_version[];
313
314 extern void igbvf_check_options(struct igbvf_adapter *);
315 extern void igbvf_set_ethtool_ops(struct net_device *);
316
317 extern int igbvf_up(struct igbvf_adapter *);
318 extern void igbvf_down(struct igbvf_adapter *);
319 extern void igbvf_reinit_locked(struct igbvf_adapter *);
320 extern int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
321 extern int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
322 extern void igbvf_free_rx_resources(struct igbvf_ring *);
323 extern void igbvf_free_tx_resources(struct igbvf_ring *);
324 extern void igbvf_update_stats(struct igbvf_adapter *);
325
326 extern unsigned int copybreak;
327
328 #endif /* _IGBVF_H_ */
329
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