1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2014 Intel Corporation.
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.
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
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.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
31 #include <linux/types.h>
32 #include <linux/bitops.h>
33 #include <linux/timer.h>
35 #include <linux/netdevice.h>
36 #include <linux/if_vlan.h>
37 #include <linux/u64_stats_sync.h>
41 #ifdef CONFIG_NET_RX_BUSY_POLL
42 #include <net/busy_poll.h>
43 #define BP_EXTENDED_STATS
46 /* wrapper around a pointer to a socket buffer,
47 * so a DMA handle can be stored along with the buffer */
48 struct ixgbevf_tx_buffer {
49 union ixgbe_adv_tx_desc *next_to_watch;
50 unsigned long time_stamp;
52 unsigned int bytecount;
53 unsigned short gso_segs;
55 DEFINE_DMA_UNMAP_ADDR(dma);
56 DEFINE_DMA_UNMAP_LEN(len);
60 struct ixgbevf_rx_buffer {
65 struct ixgbevf_stats {
68 #ifdef BP_EXTENDED_STATS
75 struct ixgbevf_tx_queue_stats {
81 struct ixgbevf_rx_queue_stats {
83 u64 alloc_rx_page_failed;
84 u64 alloc_rx_buff_failed;
89 struct ixgbevf_ring *next;
90 struct net_device *netdev;
92 void *desc; /* descriptor ring memory */
93 dma_addr_t dma; /* phys. address of descriptor ring */
94 unsigned int size; /* length in bytes */
95 unsigned int count; /* amount of descriptors */
96 unsigned int next_to_use;
97 unsigned int next_to_clean;
100 struct ixgbevf_tx_buffer *tx_buffer_info;
101 struct ixgbevf_rx_buffer *rx_buffer_info;
104 struct ixgbevf_stats stats;
105 struct u64_stats_sync syncp;
107 struct ixgbevf_tx_queue_stats tx_stats;
108 struct ixgbevf_rx_queue_stats rx_stats;
111 u64 hw_csum_rx_error;
114 u16 reg_idx; /* holds the special value that gets the hardware register
115 * offset associated with this ring, which is different
116 * for DCB and RSS modes */
119 int queue_index; /* needed for multiqueue queue management */
122 /* How many Rx Buffers do we bundle into one write to the hardware ? */
123 #define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
125 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
126 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
128 #define IXGBEVF_DEFAULT_TXD 1024
129 #define IXGBEVF_DEFAULT_RXD 512
130 #define IXGBEVF_MAX_TXD 4096
131 #define IXGBEVF_MIN_TXD 64
132 #define IXGBEVF_MAX_RXD 4096
133 #define IXGBEVF_MIN_RXD 64
135 /* Supported Rx Buffer Sizes */
136 #define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
137 #define IXGBEVF_RXBUFFER_2K 2048
138 #define IXGBEVF_RXBUFFER_4K 4096
139 #define IXGBEVF_RXBUFFER_8K 8192
140 #define IXGBEVF_RXBUFFER_10K 10240
142 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
144 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
146 #define IXGBE_TX_FLAGS_CSUM (u32)(1)
147 #define IXGBE_TX_FLAGS_VLAN (u32)(1 << 1)
148 #define IXGBE_TX_FLAGS_TSO (u32)(1 << 2)
149 #define IXGBE_TX_FLAGS_IPV4 (u32)(1 << 3)
150 #define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
151 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
152 #define IXGBE_TX_FLAGS_VLAN_SHIFT 16
154 struct ixgbevf_ring_container {
155 struct ixgbevf_ring *ring; /* pointer to linked list of rings */
156 unsigned int total_bytes; /* total bytes processed this int */
157 unsigned int total_packets; /* total packets processed this int */
158 u8 count; /* total number of rings in vector */
159 u8 itr; /* current ITR setting for ring */
162 /* iterator for handling rings in ring container */
163 #define ixgbevf_for_each_ring(pos, head) \
164 for (pos = (head).ring; pos != NULL; pos = pos->next)
166 /* MAX_MSIX_Q_VECTORS of these are allocated,
167 * but we only use one per queue-specific vector.
169 struct ixgbevf_q_vector {
170 struct ixgbevf_adapter *adapter;
171 u16 v_idx; /* index of q_vector within array, also used for
172 * finding the bit in EICR and friends that
173 * represents the vector for this ring */
174 u16 itr; /* Interrupt throttle rate written to EITR */
175 struct napi_struct napi;
176 struct ixgbevf_ring_container rx, tx;
177 char name[IFNAMSIZ + 9];
178 #ifdef CONFIG_NET_RX_BUSY_POLL
180 #define IXGBEVF_QV_STATE_IDLE 0
181 #define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
182 #define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
183 #define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
184 #define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
185 #define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
186 #define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
187 #define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
188 #define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | IXGBEVF_QV_STATE_POLL_YIELD)
189 #define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | IXGBEVF_QV_STATE_POLL_YIELD)
191 #endif /* CONFIG_NET_RX_BUSY_POLL */
193 #ifdef CONFIG_NET_RX_BUSY_POLL
194 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
197 spin_lock_init(&q_vector->lock);
198 q_vector->state = IXGBEVF_QV_STATE_IDLE;
201 /* called from the device poll routine to get ownership of a q_vector */
202 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
205 spin_lock_bh(&q_vector->lock);
206 if (q_vector->state & IXGBEVF_QV_LOCKED) {
207 WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
208 q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
210 #ifdef BP_EXTENDED_STATS
211 q_vector->tx.ring->stats.yields++;
214 /* we don't care if someone yielded */
215 q_vector->state = IXGBEVF_QV_STATE_NAPI;
217 spin_unlock_bh(&q_vector->lock);
221 /* returns true is someone tried to get the qv while napi had it */
222 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
225 spin_lock_bh(&q_vector->lock);
226 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
227 IXGBEVF_QV_STATE_NAPI_YIELD));
229 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
231 /* reset state to idle, unless QV is disabled */
232 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
233 spin_unlock_bh(&q_vector->lock);
237 /* called from ixgbevf_low_latency_poll() */
238 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
241 spin_lock_bh(&q_vector->lock);
242 if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
243 q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
245 #ifdef BP_EXTENDED_STATS
246 q_vector->rx.ring->stats.yields++;
249 /* preserve yield marks */
250 q_vector->state |= IXGBEVF_QV_STATE_POLL;
252 spin_unlock_bh(&q_vector->lock);
256 /* returns true if someone tried to get the qv while it was locked */
257 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
260 spin_lock_bh(&q_vector->lock);
261 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
263 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
265 /* reset state to idle, unless QV is disabled */
266 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
267 spin_unlock_bh(&q_vector->lock);
271 /* true if a socket is polling, even if it did not get the lock */
272 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
274 WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
275 return q_vector->state & IXGBEVF_QV_USER_PEND;
278 /* false if QV is currently owned */
279 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
282 spin_lock_bh(&q_vector->lock);
283 if (q_vector->state & IXGBEVF_QV_OWNED)
285 q_vector->state |= IXGBEVF_QV_STATE_DISABLED;
286 spin_unlock_bh(&q_vector->lock);
290 #endif /* CONFIG_NET_RX_BUSY_POLL */
293 * microsecond values for various ITR rates shifted by 2 to fit itr register
294 * with the first 3 bits reserved 0
296 #define IXGBE_MIN_RSC_ITR 24
297 #define IXGBE_100K_ITR 40
298 #define IXGBE_20K_ITR 200
299 #define IXGBE_10K_ITR 400
300 #define IXGBE_8K_ITR 500
302 /* Helper macros to switch between ints/sec and what the register uses.
303 * And yes, it's the same math going both ways. The lowest value
304 * supported by all of the ixgbe hardware is 8.
306 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
307 ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
308 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
310 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
312 u16 ntc = ring->next_to_clean;
313 u16 ntu = ring->next_to_use;
315 return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
318 static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
320 writel(value, ring->tail);
323 #define IXGBEVF_RX_DESC(R, i) \
324 (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
325 #define IXGBEVF_TX_DESC(R, i) \
326 (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
327 #define IXGBEVF_TX_CTXTDESC(R, i) \
328 (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
330 #define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
332 #define OTHER_VECTOR 1
333 #define NON_Q_VECTORS (OTHER_VECTOR)
335 #define MAX_MSIX_Q_VECTORS 2
337 #define MIN_MSIX_Q_VECTORS 1
338 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
340 /* board specific private data structure */
341 struct ixgbevf_adapter {
342 struct timer_list watchdog_timer;
343 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
344 struct work_struct reset_task;
345 struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
347 /* Interrupt Throttle Rate */
351 /* interrupt masks */
352 u32 eims_enable_mask;
357 struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
359 u32 tx_timeout_count;
363 struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
364 u64 hw_csum_rx_error;
365 u64 hw_rx_no_dma_resources;
367 int num_msix_vectors;
368 u32 alloc_rx_page_failed;
369 u32 alloc_rx_buff_failed;
371 /* Some features need tri-state capability,
372 * thus the additional *_CAPABLE flags.
375 #define IXGBE_FLAG_IN_WATCHDOG_TASK (u32)(1)
376 #define IXGBE_FLAG_IN_NETPOLL (u32)(1 << 1)
377 #define IXGBEVF_FLAG_QUEUE_RESET_REQUESTED (u32)(1 << 2)
379 struct msix_entry *msix_entries;
381 /* OS defined structs */
382 struct net_device *netdev;
383 struct pci_dev *pdev;
385 /* structs defined in ixgbe_vf.h */
389 /* Interrupt Throttle Rate */
392 struct ixgbevf_hw_stats stats;
396 unsigned int tx_ring_count;
397 unsigned int rx_ring_count;
399 #ifdef BP_EXTENDED_STATS
409 u8 __iomem *io_addr; /* Mainly for iounmap use */
415 struct work_struct watchdog_task;
418 enum ixbgevf_state_t {
426 struct sk_buff *prev;
428 #define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
430 enum ixgbevf_boards {
435 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
436 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
437 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
439 /* needed by ethtool.c */
440 extern const char ixgbevf_driver_name[];
441 extern const char ixgbevf_driver_version[];
443 void ixgbevf_up(struct ixgbevf_adapter *adapter);
444 void ixgbevf_down(struct ixgbevf_adapter *adapter);
445 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
446 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
447 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
448 int ixgbevf_setup_rx_resources(struct ixgbevf_ring *);
449 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
450 void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
451 void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
452 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
453 int ethtool_ioctl(struct ifreq *ifr);
455 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
457 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
458 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
461 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
462 #define hw_dbg(hw, format, arg...) \
463 printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
465 #define hw_dbg(hw, format, arg...) do {} while (0)
468 #endif /* _IXGBEVF_H_ */