1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2015 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, see <http://www.gnu.org/licenses/>.
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *******************************************************************************/
30 #include <linux/types.h>
31 #include <linux/bitops.h>
32 #include <linux/timer.h>
34 #include <linux/netdevice.h>
35 #include <linux/if_vlan.h>
36 #include <linux/u64_stats_sync.h>
40 #ifdef CONFIG_NET_RX_BUSY_POLL
41 #include <net/busy_poll.h>
42 #define BP_EXTENDED_STATS
45 #define IXGBE_MAX_TXD_PWR 14
46 #define IXGBE_MAX_DATA_PER_TXD BIT(IXGBE_MAX_TXD_PWR)
48 /* Tx Descriptors needed, worst case */
49 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
50 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
52 /* wrapper around a pointer to a socket buffer,
53 * so a DMA handle can be stored along with the buffer
55 struct ixgbevf_tx_buffer
{
56 union ixgbe_adv_tx_desc
*next_to_watch
;
57 unsigned long time_stamp
;
59 unsigned int bytecount
;
60 unsigned short gso_segs
;
62 DEFINE_DMA_UNMAP_ADDR(dma
);
63 DEFINE_DMA_UNMAP_LEN(len
);
67 struct ixgbevf_rx_buffer
{
70 unsigned int page_offset
;
73 struct ixgbevf_stats
{
76 #ifdef BP_EXTENDED_STATS
83 struct ixgbevf_tx_queue_stats
{
89 struct ixgbevf_rx_queue_stats
{
90 u64 alloc_rx_page_failed
;
91 u64 alloc_rx_buff_failed
;
95 enum ixgbevf_ring_state_t
{
96 __IXGBEVF_TX_DETECT_HANG
,
97 __IXGBEVF_HANG_CHECK_ARMED
,
100 #define check_for_tx_hang(ring) \
101 test_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
102 #define set_check_for_tx_hang(ring) \
103 set_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
104 #define clear_check_for_tx_hang(ring) \
105 clear_bit(__IXGBEVF_TX_DETECT_HANG, &(ring)->state)
107 struct ixgbevf_ring
{
108 struct ixgbevf_ring
*next
;
109 struct net_device
*netdev
;
111 void *desc
; /* descriptor ring memory */
112 dma_addr_t dma
; /* phys. address of descriptor ring */
113 unsigned int size
; /* length in bytes */
114 u16 count
; /* amount of descriptors */
120 struct ixgbevf_tx_buffer
*tx_buffer_info
;
121 struct ixgbevf_rx_buffer
*rx_buffer_info
;
124 struct ixgbevf_stats stats
;
125 struct u64_stats_sync syncp
;
127 struct ixgbevf_tx_queue_stats tx_stats
;
128 struct ixgbevf_rx_queue_stats rx_stats
;
131 u64 hw_csum_rx_error
;
135 /* holds the special value that gets the hardware register offset
136 * associated with this ring, which is different for DCB and RSS modes
139 int queue_index
; /* needed for multiqueue queue management */
142 /* How many Rx Buffers do we bundle into one write to the hardware ? */
143 #define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
145 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
146 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
147 #define IXGBEVF_MAX_RSS_QUEUES 2
148 #define IXGBEVF_82599_RETA_SIZE 128 /* 128 entries */
149 #define IXGBEVF_X550_VFRETA_SIZE 64 /* 64 entries */
150 #define IXGBEVF_RSS_HASH_KEY_SIZE 40
151 #define IXGBEVF_VFRSSRK_REGS 10 /* 10 registers for RSS key */
153 #define IXGBEVF_DEFAULT_TXD 1024
154 #define IXGBEVF_DEFAULT_RXD 512
155 #define IXGBEVF_MAX_TXD 4096
156 #define IXGBEVF_MIN_TXD 64
157 #define IXGBEVF_MAX_RXD 4096
158 #define IXGBEVF_MIN_RXD 64
160 /* Supported Rx Buffer Sizes */
161 #define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
162 #define IXGBEVF_RXBUFFER_2048 2048
164 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
165 #define IXGBEVF_RX_BUFSZ IXGBEVF_RXBUFFER_2048
167 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
169 #define IXGBE_TX_FLAGS_CSUM BIT(0)
170 #define IXGBE_TX_FLAGS_VLAN BIT(1)
171 #define IXGBE_TX_FLAGS_TSO BIT(2)
172 #define IXGBE_TX_FLAGS_IPV4 BIT(3)
173 #define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
174 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
175 #define IXGBE_TX_FLAGS_VLAN_SHIFT 16
177 struct ixgbevf_ring_container
{
178 struct ixgbevf_ring
*ring
; /* pointer to linked list of rings */
179 unsigned int total_bytes
; /* total bytes processed this int */
180 unsigned int total_packets
; /* total packets processed this int */
181 u8 count
; /* total number of rings in vector */
182 u8 itr
; /* current ITR setting for ring */
185 /* iterator for handling rings in ring container */
186 #define ixgbevf_for_each_ring(pos, head) \
187 for (pos = (head).ring; pos != NULL; pos = pos->next)
189 /* MAX_MSIX_Q_VECTORS of these are allocated,
190 * but we only use one per queue-specific vector.
192 struct ixgbevf_q_vector
{
193 struct ixgbevf_adapter
*adapter
;
194 /* index of q_vector within array, also used for finding the bit in
195 * EICR and friends that represents the vector for this ring
198 u16 itr
; /* Interrupt throttle rate written to EITR */
199 struct napi_struct napi
;
200 struct ixgbevf_ring_container rx
, tx
;
201 char name
[IFNAMSIZ
+ 9];
202 #ifdef CONFIG_NET_RX_BUSY_POLL
204 #define IXGBEVF_QV_STATE_IDLE 0
205 #define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
206 #define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
207 #define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
208 #define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
209 #define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
210 #define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
211 #define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
212 #define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | \
213 IXGBEVF_QV_STATE_POLL_YIELD)
214 #define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | \
215 IXGBEVF_QV_STATE_POLL_YIELD)
217 #endif /* CONFIG_NET_RX_BUSY_POLL */
220 #ifdef CONFIG_NET_RX_BUSY_POLL
221 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector
*q_vector
)
223 spin_lock_init(&q_vector
->lock
);
224 q_vector
->state
= IXGBEVF_QV_STATE_IDLE
;
227 /* called from the device poll routine to get ownership of a q_vector */
228 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector
*q_vector
)
232 spin_lock_bh(&q_vector
->lock
);
233 if (q_vector
->state
& IXGBEVF_QV_LOCKED
) {
234 WARN_ON(q_vector
->state
& IXGBEVF_QV_STATE_NAPI
);
235 q_vector
->state
|= IXGBEVF_QV_STATE_NAPI_YIELD
;
237 #ifdef BP_EXTENDED_STATS
238 q_vector
->tx
.ring
->stats
.yields
++;
241 /* we don't care if someone yielded */
242 q_vector
->state
= IXGBEVF_QV_STATE_NAPI
;
244 spin_unlock_bh(&q_vector
->lock
);
248 /* returns true is someone tried to get the qv while napi had it */
249 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector
*q_vector
)
253 spin_lock_bh(&q_vector
->lock
);
254 WARN_ON(q_vector
->state
& (IXGBEVF_QV_STATE_POLL
|
255 IXGBEVF_QV_STATE_NAPI_YIELD
));
257 if (q_vector
->state
& IXGBEVF_QV_STATE_POLL_YIELD
)
259 /* reset state to idle, unless QV is disabled */
260 q_vector
->state
&= IXGBEVF_QV_STATE_DISABLED
;
261 spin_unlock_bh(&q_vector
->lock
);
265 /* called from ixgbevf_low_latency_poll() */
266 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector
*q_vector
)
270 spin_lock_bh(&q_vector
->lock
);
271 if ((q_vector
->state
& IXGBEVF_QV_LOCKED
)) {
272 q_vector
->state
|= IXGBEVF_QV_STATE_POLL_YIELD
;
274 #ifdef BP_EXTENDED_STATS
275 q_vector
->rx
.ring
->stats
.yields
++;
278 /* preserve yield marks */
279 q_vector
->state
|= IXGBEVF_QV_STATE_POLL
;
281 spin_unlock_bh(&q_vector
->lock
);
285 /* returns true if someone tried to get the qv while it was locked */
286 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector
*q_vector
)
290 spin_lock_bh(&q_vector
->lock
);
291 WARN_ON(q_vector
->state
& (IXGBEVF_QV_STATE_NAPI
));
293 if (q_vector
->state
& IXGBEVF_QV_STATE_POLL_YIELD
)
295 /* reset state to idle, unless QV is disabled */
296 q_vector
->state
&= IXGBEVF_QV_STATE_DISABLED
;
297 spin_unlock_bh(&q_vector
->lock
);
301 /* true if a socket is polling, even if it did not get the lock */
302 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector
*q_vector
)
304 WARN_ON(!(q_vector
->state
& IXGBEVF_QV_OWNED
));
305 return q_vector
->state
& IXGBEVF_QV_USER_PEND
;
308 /* false if QV is currently owned */
309 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector
*q_vector
)
313 spin_lock_bh(&q_vector
->lock
);
314 if (q_vector
->state
& IXGBEVF_QV_OWNED
)
316 q_vector
->state
|= IXGBEVF_QV_STATE_DISABLED
;
317 spin_unlock_bh(&q_vector
->lock
);
321 #endif /* CONFIG_NET_RX_BUSY_POLL */
323 /* microsecond values for various ITR rates shifted by 2 to fit itr register
324 * with the first 3 bits reserved 0
326 #define IXGBE_MIN_RSC_ITR 24
327 #define IXGBE_100K_ITR 40
328 #define IXGBE_20K_ITR 200
329 #define IXGBE_12K_ITR 336
331 /* Helper macros to switch between ints/sec and what the register uses.
332 * And yes, it's the same math going both ways. The lowest value
333 * supported by all of the ixgbe hardware is 8.
335 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
336 ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
337 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
339 /* ixgbevf_test_staterr - tests bits in Rx descriptor status and error fields */
340 static inline __le32
ixgbevf_test_staterr(union ixgbe_adv_rx_desc
*rx_desc
,
341 const u32 stat_err_bits
)
343 return rx_desc
->wb
.upper
.status_error
& cpu_to_le32(stat_err_bits
);
346 static inline u16
ixgbevf_desc_unused(struct ixgbevf_ring
*ring
)
348 u16 ntc
= ring
->next_to_clean
;
349 u16 ntu
= ring
->next_to_use
;
351 return ((ntc
> ntu
) ? 0 : ring
->count
) + ntc
- ntu
- 1;
354 static inline void ixgbevf_write_tail(struct ixgbevf_ring
*ring
, u32 value
)
356 writel(value
, ring
->tail
);
359 #define IXGBEVF_RX_DESC(R, i) \
360 (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
361 #define IXGBEVF_TX_DESC(R, i) \
362 (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
363 #define IXGBEVF_TX_CTXTDESC(R, i) \
364 (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
366 #define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
368 #define OTHER_VECTOR 1
369 #define NON_Q_VECTORS (OTHER_VECTOR)
371 #define MAX_MSIX_Q_VECTORS 2
373 #define MIN_MSIX_Q_VECTORS 1
374 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
376 /* board specific private data structure */
377 struct ixgbevf_adapter
{
378 /* this field must be first, see ixgbevf_process_skb_fields */
379 unsigned long active_vlans
[BITS_TO_LONGS(VLAN_N_VID
)];
381 struct ixgbevf_q_vector
*q_vector
[MAX_MSIX_Q_VECTORS
];
383 /* Interrupt Throttle Rate */
387 /* interrupt masks */
388 u32 eims_enable_mask
;
393 struct ixgbevf_ring
*tx_ring
[MAX_TX_QUEUES
]; /* One per active queue */
395 u32 tx_timeout_count
;
399 struct ixgbevf_ring
*rx_ring
[MAX_TX_QUEUES
]; /* One per active queue */
400 u64 hw_csum_rx_error
;
401 u64 hw_rx_no_dma_resources
;
402 int num_msix_vectors
;
403 u32 alloc_rx_page_failed
;
404 u32 alloc_rx_buff_failed
;
406 struct msix_entry
*msix_entries
;
408 /* OS defined structs */
409 struct net_device
*netdev
;
410 struct pci_dev
*pdev
;
412 /* structs defined in ixgbe_vf.h */
415 /* Interrupt Throttle Rate */
418 struct ixgbevf_hw_stats stats
;
422 unsigned int tx_ring_count
;
423 unsigned int rx_ring_count
;
425 u8 __iomem
*io_addr
; /* Mainly for iounmap use */
429 struct timer_list service_timer
;
430 struct work_struct service_task
;
433 unsigned long last_reset
;
435 u32 rss_key
[IXGBEVF_VFRSSRK_REGS
];
436 u8 rss_indir_tbl
[IXGBEVF_X550_VFRETA_SIZE
];
439 enum ixbgevf_state_t
{
445 __IXGBEVF_SERVICE_SCHED
,
446 __IXGBEVF_SERVICE_INITED
,
447 __IXGBEVF_RESET_REQUESTED
,
448 __IXGBEVF_QUEUE_RESET_REQUESTED
,
451 enum ixgbevf_boards
{
459 board_X550EM_x_vf_hv
,
463 enum ixgbevf_xcast_modes
{
464 IXGBEVF_XCAST_MODE_NONE
= 0,
465 IXGBEVF_XCAST_MODE_MULTI
,
466 IXGBEVF_XCAST_MODE_ALLMULTI
,
469 extern const struct ixgbevf_info ixgbevf_82599_vf_info
;
470 extern const struct ixgbevf_info ixgbevf_X540_vf_info
;
471 extern const struct ixgbevf_info ixgbevf_X550_vf_info
;
472 extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_info
;
473 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops
;
474 extern const struct ixgbevf_info ixgbevf_x550em_a_vf_info
;
476 extern const struct ixgbevf_info ixgbevf_82599_vf_hv_info
;
477 extern const struct ixgbevf_info ixgbevf_X540_vf_hv_info
;
478 extern const struct ixgbevf_info ixgbevf_X550_vf_hv_info
;
479 extern const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info
;
480 extern const struct ixgbe_mbx_operations ixgbevf_hv_mbx_ops
;
482 /* needed by ethtool.c */
483 extern const char ixgbevf_driver_name
[];
484 extern const char ixgbevf_driver_version
[];
486 int ixgbevf_open(struct net_device
*netdev
);
487 int ixgbevf_close(struct net_device
*netdev
);
488 void ixgbevf_up(struct ixgbevf_adapter
*adapter
);
489 void ixgbevf_down(struct ixgbevf_adapter
*adapter
);
490 void ixgbevf_reinit_locked(struct ixgbevf_adapter
*adapter
);
491 void ixgbevf_reset(struct ixgbevf_adapter
*adapter
);
492 void ixgbevf_set_ethtool_ops(struct net_device
*netdev
);
493 int ixgbevf_setup_rx_resources(struct ixgbevf_ring
*);
494 int ixgbevf_setup_tx_resources(struct ixgbevf_ring
*);
495 void ixgbevf_free_rx_resources(struct ixgbevf_ring
*);
496 void ixgbevf_free_tx_resources(struct ixgbevf_ring
*);
497 void ixgbevf_update_stats(struct ixgbevf_adapter
*adapter
);
498 int ethtool_ioctl(struct ifreq
*ifr
);
500 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector
*q_vector
);
502 void ixgbe_napi_add_all(struct ixgbevf_adapter
*adapter
);
503 void ixgbe_napi_del_all(struct ixgbevf_adapter
*adapter
);
506 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw
*hw
);
507 #define hw_dbg(hw, format, arg...) \
508 printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
510 #define hw_dbg(hw, format, arg...) do {} while (0)
513 #endif /* _IXGBEVF_H_ */