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 {
63 unsigned int page_offset;
66 struct ixgbevf_stats {
69 #ifdef BP_EXTENDED_STATS
76 struct ixgbevf_tx_queue_stats {
82 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 u16 count; /* amount of descriptors */
101 struct ixgbevf_tx_buffer *tx_buffer_info;
102 struct ixgbevf_rx_buffer *rx_buffer_info;
105 struct ixgbevf_stats stats;
106 struct u64_stats_sync syncp;
108 struct ixgbevf_tx_queue_stats tx_stats;
109 struct ixgbevf_rx_queue_stats rx_stats;
112 u64 hw_csum_rx_error;
116 u16 reg_idx; /* holds the special value that gets the hardware register
117 * offset associated with this ring, which is different
118 * 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_2048 2048
139 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
140 #define IXGBEVF_RX_BUFSZ IXGBEVF_RXBUFFER_2048
142 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
144 #define IXGBE_TX_FLAGS_CSUM (u32)(1)
145 #define IXGBE_TX_FLAGS_VLAN (u32)(1 << 1)
146 #define IXGBE_TX_FLAGS_TSO (u32)(1 << 2)
147 #define IXGBE_TX_FLAGS_IPV4 (u32)(1 << 3)
148 #define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
149 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
150 #define IXGBE_TX_FLAGS_VLAN_SHIFT 16
152 struct ixgbevf_ring_container {
153 struct ixgbevf_ring *ring; /* pointer to linked list of rings */
154 unsigned int total_bytes; /* total bytes processed this int */
155 unsigned int total_packets; /* total packets processed this int */
156 u8 count; /* total number of rings in vector */
157 u8 itr; /* current ITR setting for ring */
160 /* iterator for handling rings in ring container */
161 #define ixgbevf_for_each_ring(pos, head) \
162 for (pos = (head).ring; pos != NULL; pos = pos->next)
164 /* MAX_MSIX_Q_VECTORS of these are allocated,
165 * but we only use one per queue-specific vector.
167 struct ixgbevf_q_vector {
168 struct ixgbevf_adapter *adapter;
169 u16 v_idx; /* index of q_vector within array, also used for
170 * finding the bit in EICR and friends that
171 * represents the vector for this ring */
172 u16 itr; /* Interrupt throttle rate written to EITR */
173 struct napi_struct napi;
174 struct ixgbevf_ring_container rx, tx;
175 char name[IFNAMSIZ + 9];
176 #ifdef CONFIG_NET_RX_BUSY_POLL
178 #define IXGBEVF_QV_STATE_IDLE 0
179 #define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
180 #define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
181 #define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
182 #define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
183 #define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
184 #define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
185 #define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
186 #define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | IXGBEVF_QV_STATE_POLL_YIELD)
187 #define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | IXGBEVF_QV_STATE_POLL_YIELD)
189 #endif /* CONFIG_NET_RX_BUSY_POLL */
191 #ifdef CONFIG_NET_RX_BUSY_POLL
192 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
195 spin_lock_init(&q_vector->lock);
196 q_vector->state = IXGBEVF_QV_STATE_IDLE;
199 /* called from the device poll routine to get ownership of a q_vector */
200 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
203 spin_lock_bh(&q_vector->lock);
204 if (q_vector->state & IXGBEVF_QV_LOCKED) {
205 WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
206 q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
208 #ifdef BP_EXTENDED_STATS
209 q_vector->tx.ring->stats.yields++;
212 /* we don't care if someone yielded */
213 q_vector->state = IXGBEVF_QV_STATE_NAPI;
215 spin_unlock_bh(&q_vector->lock);
219 /* returns true is someone tried to get the qv while napi had it */
220 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
223 spin_lock_bh(&q_vector->lock);
224 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
225 IXGBEVF_QV_STATE_NAPI_YIELD));
227 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
229 /* reset state to idle, unless QV is disabled */
230 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
231 spin_unlock_bh(&q_vector->lock);
235 /* called from ixgbevf_low_latency_poll() */
236 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
239 spin_lock_bh(&q_vector->lock);
240 if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
241 q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
243 #ifdef BP_EXTENDED_STATS
244 q_vector->rx.ring->stats.yields++;
247 /* preserve yield marks */
248 q_vector->state |= IXGBEVF_QV_STATE_POLL;
250 spin_unlock_bh(&q_vector->lock);
254 /* returns true if someone tried to get the qv while it was locked */
255 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
258 spin_lock_bh(&q_vector->lock);
259 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
261 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
263 /* reset state to idle, unless QV is disabled */
264 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
265 spin_unlock_bh(&q_vector->lock);
269 /* true if a socket is polling, even if it did not get the lock */
270 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
272 WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
273 return q_vector->state & IXGBEVF_QV_USER_PEND;
276 /* false if QV is currently owned */
277 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
280 spin_lock_bh(&q_vector->lock);
281 if (q_vector->state & IXGBEVF_QV_OWNED)
283 q_vector->state |= IXGBEVF_QV_STATE_DISABLED;
284 spin_unlock_bh(&q_vector->lock);
288 #endif /* CONFIG_NET_RX_BUSY_POLL */
291 * microsecond values for various ITR rates shifted by 2 to fit itr register
292 * with the first 3 bits reserved 0
294 #define IXGBE_MIN_RSC_ITR 24
295 #define IXGBE_100K_ITR 40
296 #define IXGBE_20K_ITR 200
297 #define IXGBE_10K_ITR 400
298 #define IXGBE_8K_ITR 500
300 /* Helper macros to switch between ints/sec and what the register uses.
301 * And yes, it's the same math going both ways. The lowest value
302 * supported by all of the ixgbe hardware is 8.
304 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
305 ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
306 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
308 /* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
309 static inline __le32 ixgbevf_test_staterr(union ixgbe_adv_rx_desc *rx_desc,
310 const u32 stat_err_bits)
312 return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
315 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
317 u16 ntc = ring->next_to_clean;
318 u16 ntu = ring->next_to_use;
320 return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
323 static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
325 writel(value, ring->tail);
328 #define IXGBEVF_RX_DESC(R, i) \
329 (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
330 #define IXGBEVF_TX_DESC(R, i) \
331 (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
332 #define IXGBEVF_TX_CTXTDESC(R, i) \
333 (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
335 #define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
337 #define OTHER_VECTOR 1
338 #define NON_Q_VECTORS (OTHER_VECTOR)
340 #define MAX_MSIX_Q_VECTORS 2
342 #define MIN_MSIX_Q_VECTORS 1
343 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
345 /* board specific private data structure */
346 struct ixgbevf_adapter {
347 /* this field must be first, see ixgbevf_process_skb_fields */
348 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
350 struct timer_list watchdog_timer;
351 struct work_struct reset_task;
352 struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
354 /* Interrupt Throttle Rate */
358 /* interrupt masks */
359 u32 eims_enable_mask;
364 struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
366 u32 tx_timeout_count;
370 struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
371 u64 hw_csum_rx_error;
372 u64 hw_rx_no_dma_resources;
373 int num_msix_vectors;
374 u32 alloc_rx_page_failed;
375 u32 alloc_rx_buff_failed;
377 /* Some features need tri-state capability,
378 * thus the additional *_CAPABLE flags.
381 #define IXGBE_FLAG_IN_WATCHDOG_TASK (u32)(1)
383 #define IXGBEVF_FLAG_QUEUE_RESET_REQUESTED (u32)(1 << 2)
385 struct msix_entry *msix_entries;
387 /* OS defined structs */
388 struct net_device *netdev;
389 struct pci_dev *pdev;
391 /* structs defined in ixgbe_vf.h */
394 /* Interrupt Throttle Rate */
397 struct ixgbevf_hw_stats stats;
401 unsigned int tx_ring_count;
402 unsigned int rx_ring_count;
404 #ifdef BP_EXTENDED_STATS
414 u8 __iomem *io_addr; /* Mainly for iounmap use */
420 struct work_struct watchdog_task;
423 enum ixbgevf_state_t {
432 enum ixgbevf_boards {
437 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
438 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
439 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
441 /* needed by ethtool.c */
442 extern const char ixgbevf_driver_name[];
443 extern const char ixgbevf_driver_version[];
445 void ixgbevf_up(struct ixgbevf_adapter *adapter);
446 void ixgbevf_down(struct ixgbevf_adapter *adapter);
447 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
448 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
449 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
450 int ixgbevf_setup_rx_resources(struct ixgbevf_ring *);
451 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
452 void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
453 void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
454 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
455 int ethtool_ioctl(struct ifreq *ifr);
457 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
459 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
460 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
463 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
464 #define hw_dbg(hw, format, arg...) \
465 printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
467 #define hw_dbg(hw, format, arg...) do {} while (0)
470 #endif /* _IXGBEVF_H_ */