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ixgbevf.h
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1 /*******************************************************************************
2 
3  Intel 82599 Virtual Function driver
4  Copyright(c) 1999 - 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 <[email protected]>
24  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 
26 *******************************************************************************/
27 
28 #ifndef _IXGBEVF_H_
29 #define _IXGBEVF_H_
30 
31 #include <linux/types.h>
32 #include <linux/bitops.h>
33 #include <linux/timer.h>
34 #include <linux/io.h>
35 #include <linux/netdevice.h>
36 #include <linux/if_vlan.h>
37 #include <linux/u64_stats_sync.h>
38 
39 #include "vf.h"
40 
41 /* wrapper around a pointer to a socket buffer,
42  * so a DMA handle can be stored along with the buffer */
44  struct sk_buff *skb;
46  unsigned long time_stamp;
50 };
51 
53  struct sk_buff *skb;
55 };
56 
57 struct ixgbevf_ring {
58  struct ixgbevf_ring *next;
59  struct net_device *netdev;
60  struct device *dev;
61  struct ixgbevf_adapter *adapter; /* backlink */
62  void *desc; /* descriptor ring memory */
63  dma_addr_t dma; /* phys. address of descriptor ring */
64  unsigned int size; /* length in bytes */
65  unsigned int count; /* amount of descriptors */
66  unsigned int next_to_use;
67  unsigned int next_to_clean;
68 
69  int queue_index; /* needed for multiqueue queue management */
70  union {
73  };
74 
78 
81 
82  u16 reg_idx; /* holds the special value that gets the hardware register
83  * offset associated with this ring, which is different
84  * for DCB and RSS modes */
85 
87 };
88 
89 /* How many Rx Buffers do we bundle into one write to the hardware ? */
90 #define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
91 
92 #define MAX_RX_QUEUES 1
93 #define MAX_TX_QUEUES 1
94 
95 #define IXGBEVF_DEFAULT_TXD 1024
96 #define IXGBEVF_DEFAULT_RXD 512
97 #define IXGBEVF_MAX_TXD 4096
98 #define IXGBEVF_MIN_TXD 64
99 #define IXGBEVF_MAX_RXD 4096
100 #define IXGBEVF_MIN_RXD 64
101 
102 /* Supported Rx Buffer Sizes */
103 #define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
104 #define IXGBEVF_RXBUFFER_3K 3072
105 #define IXGBEVF_RXBUFFER_7K 7168
106 #define IXGBEVF_RXBUFFER_15K 15360
107 #define IXGBEVF_MAX_RXBUFFER 16384 /* largest size for single descriptor */
108 
109 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
110 
111 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
112 
113 #define IXGBE_TX_FLAGS_CSUM (u32)(1)
114 #define IXGBE_TX_FLAGS_VLAN (u32)(1 << 1)
115 #define IXGBE_TX_FLAGS_TSO (u32)(1 << 2)
116 #define IXGBE_TX_FLAGS_IPV4 (u32)(1 << 3)
117 #define IXGBE_TX_FLAGS_FCOE (u32)(1 << 4)
118 #define IXGBE_TX_FLAGS_FSO (u32)(1 << 5)
119 #define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
120 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
121 #define IXGBE_TX_FLAGS_VLAN_SHIFT 16
122 
124  struct ixgbevf_ring *ring; /* pointer to linked list of rings */
125  unsigned int total_bytes; /* total bytes processed this int */
126  unsigned int total_packets; /* total packets processed this int */
127  u8 count; /* total number of rings in vector */
128  u8 itr; /* current ITR setting for ring */
129 };
130 
131 /* iterator for handling rings in ring container */
132 #define ixgbevf_for_each_ring(pos, head) \
133  for (pos = (head).ring; pos != NULL; pos = pos->next)
134 
135 /* MAX_MSIX_Q_VECTORS of these are allocated,
136  * but we only use one per queue-specific vector.
137  */
140  u16 v_idx; /* index of q_vector within array, also used for
141  * finding the bit in EICR and friends that
142  * represents the vector for this ring */
143  u16 itr; /* Interrupt throttle rate written to EITR */
146  char name[IFNAMSIZ + 9];
147 };
148 
149 /*
150  * microsecond values for various ITR rates shifted by 2 to fit itr register
151  * with the first 3 bits reserved 0
152  */
153 #define IXGBE_MIN_RSC_ITR 24
154 #define IXGBE_100K_ITR 40
155 #define IXGBE_20K_ITR 200
156 #define IXGBE_10K_ITR 400
157 #define IXGBE_8K_ITR 500
158 
159 /* Helper macros to switch between ints/sec and what the register uses.
160  * And yes, it's the same math going both ways. The lowest value
161  * supported by all of the ixgbe hardware is 8.
162  */
163 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
164  ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
165 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
166 
167 #define IXGBE_DESC_UNUSED(R) \
168  ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
169  (R)->next_to_clean - (R)->next_to_use - 1)
170 
171 #define IXGBEVF_RX_DESC(R, i) \
172  (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
173 #define IXGBEVF_TX_DESC(R, i) \
174  (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
175 #define IXGBEVF_TX_CTXTDESC(R, i) \
176  (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
177 
178 #define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
179 
180 #define OTHER_VECTOR 1
181 #define NON_Q_VECTORS (OTHER_VECTOR)
182 
183 #define MAX_MSIX_Q_VECTORS 2
184 
185 #define MIN_MSIX_Q_VECTORS 1
186 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
187 
188 /* board specific private data structure */
195 
196  /* Interrupt Throttle Rate */
199 
200  /* interrupt masks */
203 
204  /* TX */
205  struct ixgbevf_ring *tx_ring; /* One per active queue */
213 
214  /* RX */
215  struct ixgbevf_ring *rx_ring; /* One per active queue */
222  struct msix_entry *msix_entries;
223 
226 
227  /* Some features need tri-state capability,
228  * thus the additional *_CAPABLE flags.
229  */
231 #define IXGBE_FLAG_IN_WATCHDOG_TASK (u32)(1)
232 
233  /* OS defined structs */
235  struct pci_dev *pdev;
236 
237  /* structs defined in ixgbe_vf.h */
238  struct ixgbe_hw hw;
242  /* Interrupt Throttle Rate */
244 
245  unsigned long state;
247  unsigned int tx_ring_count;
248  unsigned int rx_ring_count;
249 
251  bool link_up;
252 
254 
256 };
257 
262 };
263 
264 struct ixgbevf_cb {
265  struct sk_buff *prev;
266 };
267 #define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
268 
272 };
273 
274 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
275 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
276 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
277 
278 /* needed by ethtool.c */
279 extern const char ixgbevf_driver_name[];
280 extern const char ixgbevf_driver_version[];
281 
282 extern void ixgbevf_up(struct ixgbevf_adapter *adapter);
283 extern void ixgbevf_down(struct ixgbevf_adapter *adapter);
284 extern void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
285 extern void ixgbevf_reset(struct ixgbevf_adapter *adapter);
286 extern void ixgbevf_set_ethtool_ops(struct net_device *netdev);
287 extern int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *,
288  struct ixgbevf_ring *);
289 extern int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *,
290  struct ixgbevf_ring *);
291 extern void ixgbevf_free_rx_resources(struct ixgbevf_adapter *,
292  struct ixgbevf_ring *);
293 extern void ixgbevf_free_tx_resources(struct ixgbevf_adapter *,
294  struct ixgbevf_ring *);
295 extern void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
296 extern int ethtool_ioctl(struct ifreq *ifr);
297 
298 extern void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
299 extern void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
300 
301 #ifdef DEBUG
302 extern char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
303 #define hw_dbg(hw, format, arg...) \
304  printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
305 #else
306 #define hw_dbg(hw, format, arg...) do {} while (0)
307 #endif
308 
309 #endif /* _IXGBEVF_H_ */