1 /* Intel Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2014 Intel Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
16 * Contact Information:
17 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
18 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 #include <linux/types.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/if_vlan.h>
28 #include <linux/pci.h>
29 #include <linux/net_tstamp.h>
30 #include <linux/clocksource.h>
31 #include <linux/ptp_clock_kernel.h>
36 #define FM10K_MAX_JUMBO_FRAME_SIZE 15358 /* Maximum supported size 15K */
38 #define MAX_QUEUES FM10K_MAX_QUEUES_PF
40 #define FM10K_MIN_RXD 128
41 #define FM10K_MAX_RXD 4096
42 #define FM10K_DEFAULT_RXD 256
44 #define FM10K_MIN_TXD 128
45 #define FM10K_MAX_TXD 4096
46 #define FM10K_DEFAULT_TXD 256
47 #define FM10K_DEFAULT_TX_WORK 256
49 #define FM10K_RXBUFFER_256 256
50 #define FM10K_RXBUFFER_16384 16384
51 #define FM10K_RX_HDR_LEN FM10K_RXBUFFER_256
52 #if PAGE_SIZE <= FM10K_RXBUFFER_16384
53 #define FM10K_RX_BUFSZ (PAGE_SIZE / 2)
55 #define FM10K_RX_BUFSZ FM10K_RXBUFFER_16384
58 /* How many Rx Buffers do we bundle into one write to the hardware ? */
59 #define FM10K_RX_BUFFER_WRITE 16 /* Must be power of 2 */
61 #define FM10K_MAX_STATIONS 63
62 struct fm10k_l2_accel
{
67 struct net_device
*macvlan
[0];
70 enum fm10k_ring_state_t
{
71 __FM10K_TX_DETECT_HANG
,
72 __FM10K_HANG_CHECK_ARMED
,
75 #define check_for_tx_hang(ring) \
76 test_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
77 #define set_check_for_tx_hang(ring) \
78 set_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
79 #define clear_check_for_tx_hang(ring) \
80 clear_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
82 struct fm10k_tx_buffer
{
83 struct fm10k_tx_desc
*next_to_watch
;
85 unsigned int bytecount
;
88 DEFINE_DMA_UNMAP_ADDR(dma
);
89 DEFINE_DMA_UNMAP_LEN(len
);
92 struct fm10k_rx_buffer
{
98 struct fm10k_queue_stats
{
103 struct fm10k_tx_queue_stats
{
110 struct fm10k_rx_queue_stats
{
117 struct fm10k_q_vector
*q_vector
;/* backpointer to host q_vector */
118 struct net_device
*netdev
; /* netdev ring belongs to */
119 struct device
*dev
; /* device for DMA mapping */
120 struct fm10k_l2_accel __rcu
*l2_accel
; /* L2 acceleration list */
121 void *desc
; /* descriptor ring memory */
123 struct fm10k_tx_buffer
*tx_buffer
;
124 struct fm10k_rx_buffer
*rx_buffer
;
128 dma_addr_t dma
; /* phys. address of descriptor ring */
129 unsigned int size
; /* length in bytes */
131 u8 queue_index
; /* needed for queue management */
132 u8 reg_idx
; /* holds the special value that gets
133 * the hardware register offset
134 * associated with this ring, which is
135 * different for DCB and RSS modes
137 u8 qos_pc
; /* priority class of queue */
138 u16 vid
; /* default vlan ID of queue */
139 u16 count
; /* amount of descriptors */
145 struct fm10k_queue_stats stats
;
146 struct u64_stats_sync syncp
;
149 struct fm10k_tx_queue_stats tx_stats
;
152 struct fm10k_rx_queue_stats rx_stats
;
156 } ____cacheline_internodealigned_in_smp
;
158 struct fm10k_ring_container
{
159 struct fm10k_ring
*ring
; /* pointer to linked list of rings */
160 unsigned int total_bytes
; /* total bytes processed this int */
161 unsigned int total_packets
; /* total packets processed this int */
162 u16 work_limit
; /* total work allowed per interrupt */
163 u16 itr
; /* interrupt throttle rate value */
164 u8 count
; /* total number of rings in vector */
167 #define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */
168 #define FM10K_ITR_10K 100 /* 100us */
169 #define FM10K_ITR_20K 50 /* 50us */
170 #define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */
172 #define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR)
174 static inline struct netdev_queue
*txring_txq(const struct fm10k_ring
*ring
)
176 return &ring
->netdev
->_tx
[ring
->queue_index
];
179 /* iterator for handling rings in ring container */
180 #define fm10k_for_each_ring(pos, head) \
181 for (pos = &(head).ring[(head).count]; (--pos) >= (head).ring;)
183 #define MAX_Q_VECTORS 256
184 #define MIN_Q_VECTORS 1
185 enum fm10k_non_q_vectors
{
187 #define NON_Q_VECTORS_VF NON_Q_VECTORS_PF
191 #define NON_Q_VECTORS(hw) (((hw)->mac.type == fm10k_mac_pf) ? \
194 #define MIN_MSIX_COUNT(hw) (MIN_Q_VECTORS + NON_Q_VECTORS(hw))
196 struct fm10k_q_vector
{
197 struct fm10k_intfc
*interface
;
198 u32 __iomem
*itr
; /* pointer to ITR register for this vector */
199 u16 v_idx
; /* index of q_vector within interface array */
200 struct fm10k_ring_container rx
, tx
;
202 struct napi_struct napi
;
203 char name
[IFNAMSIZ
+ 9];
205 #ifdef CONFIG_DEBUG_FS
206 struct dentry
*dbg_q_vector
;
207 #endif /* CONFIG_DEBUG_FS */
208 struct rcu_head rcu
; /* to avoid race with update stats on free */
210 /* for dynamic allocation of rings associated with this q_vector */
211 struct fm10k_ring ring
[0] ____cacheline_internodealigned_in_smp
;
214 enum fm10k_ring_f_enum
{
217 RING_F_ARRAY_SIZE
/* must be last in enum set */
220 struct fm10k_ring_feature
{
221 u16 limit
; /* upper limit on feature indices */
222 u16 indices
; /* current value of indices */
223 u16 mask
; /* Mask used for feature to ring mapping */
224 u16 offset
; /* offset to start of feature */
227 struct fm10k_iov_data
{
228 unsigned int num_vfs
;
229 unsigned int next_vf_mbx
;
231 struct fm10k_vf_info vf_info
[0];
234 #define fm10k_vxlan_port_for_each(vp, intfc) \
235 list_for_each_entry(vp, &(intfc)->vxlan_port, list)
236 struct fm10k_vxlan_port
{
237 struct list_head list
;
238 sa_family_t sa_family
;
243 unsigned long active_vlans
[BITS_TO_LONGS(VLAN_N_VID
)];
244 struct net_device
*netdev
;
245 struct fm10k_l2_accel
*l2_accel
; /* pointer to L2 acceleration list */
246 struct pci_dev
*pdev
;
250 #define FM10K_FLAG_RESET_REQUESTED (u32)(1 << 0)
251 #define FM10K_FLAG_RSS_FIELD_IPV4_UDP (u32)(1 << 1)
252 #define FM10K_FLAG_RSS_FIELD_IPV6_UDP (u32)(1 << 2)
253 #define FM10K_FLAG_RX_TS_ENABLED (u32)(1 << 3)
254 #define FM10K_FLAG_SWPRI_CONFIG (u32)(1 << 4)
257 /* Tx fast path data */
261 /* Rx fast path data */
266 struct fm10k_ring
*tx_ring
[MAX_QUEUES
] ____cacheline_aligned_in_smp
;
282 u32 tx_timeout_count
;
285 struct fm10k_ring
*rx_ring
[MAX_QUEUES
];
287 /* Queueing vectors */
288 struct fm10k_q_vector
*q_vector
[MAX_Q_VECTORS
];
289 struct msix_entry
*msix_entries
;
290 int num_q_vectors
; /* current number of q_vectors for device */
291 struct fm10k_ring_feature ring_feature
[RING_F_ARRAY_SIZE
];
293 /* SR-IOV information management structure */
294 struct fm10k_iov_data
*iov_data
;
296 struct fm10k_hw_stats stats
;
298 u32 __iomem
*uc_addr
;
299 u32 __iomem
*sw_addr
;
303 struct timer_list service_timer
;
304 struct work_struct service_task
;
305 unsigned long next_stats_update
;
306 unsigned long next_tx_hang_check
;
307 unsigned long last_reset
;
308 unsigned long link_down_event
;
311 u32 reta
[FM10K_RETA_SIZE
];
312 u32 rssrk
[FM10K_RSSRK_SIZE
];
314 /* VXLAN port tracking information */
315 struct list_head vxlan_port
;
317 #ifdef CONFIG_DEBUG_FS
318 struct dentry
*dbg_intfc
;
320 #endif /* CONFIG_DEBUG_FS */
321 struct ptp_clock_info ptp_caps
;
322 struct ptp_clock
*ptp_clock
;
324 struct sk_buff_head ts_tx_skb_queue
;
325 u32 tx_hwtstamp_timeouts
;
327 struct hwtstamp_config ts_config
;
328 /* We are unable to actually adjust the clock beyond the frequency
329 * value. Once the clock is started there is no resetting it. As
330 * such we maintain a separate offset from the actual hardware clock
331 * to allow for offset adjustment.
334 rwlock_t systime_lock
;
340 /* GLORT resources in use by PF */
344 /* VLAN ID for updating multicast/unicast lists */
351 __FM10K_SERVICE_SCHED
,
352 __FM10K_SERVICE_DISABLE
,
357 static inline void fm10k_mbx_lock(struct fm10k_intfc
*interface
)
359 /* busy loop if we cannot obtain the lock as some calls
360 * such as ndo_set_rx_mode may be made in atomic context
362 while (test_and_set_bit(__FM10K_MBX_LOCK
, &interface
->state
))
366 static inline void fm10k_mbx_unlock(struct fm10k_intfc
*interface
)
368 /* flush memory to make sure state is correct */
369 smp_mb__before_atomic();
370 clear_bit(__FM10K_MBX_LOCK
, &interface
->state
);
373 static inline int fm10k_mbx_trylock(struct fm10k_intfc
*interface
)
375 return !test_and_set_bit(__FM10K_MBX_LOCK
, &interface
->state
);
378 /* fm10k_test_staterr - test bits in Rx descriptor status and error fields */
379 static inline __le32
fm10k_test_staterr(union fm10k_rx_desc
*rx_desc
,
380 const u32 stat_err_bits
)
382 return rx_desc
->d
.staterr
& cpu_to_le32(stat_err_bits
);
385 /* fm10k_desc_unused - calculate if we have unused descriptors */
386 static inline u16
fm10k_desc_unused(struct fm10k_ring
*ring
)
388 s16 unused
= ring
->next_to_clean
- ring
->next_to_use
- 1;
390 return likely(unused
< 0) ? unused
+ ring
->count
: unused
;
393 #define FM10K_TX_DESC(R, i) \
394 (&(((struct fm10k_tx_desc *)((R)->desc))[i]))
395 #define FM10K_RX_DESC(R, i) \
396 (&(((union fm10k_rx_desc *)((R)->desc))[i]))
398 #define FM10K_MAX_TXD_PWR 14
399 #define FM10K_MAX_DATA_PER_TXD (1 << FM10K_MAX_TXD_PWR)
401 /* Tx Descriptors needed, worst case */
402 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), FM10K_MAX_DATA_PER_TXD)
403 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
405 enum fm10k_tx_flags
{
406 /* Tx offload flags */
407 FM10K_TX_FLAGS_CSUM
= 0x01,
410 /* This structure is stored as little endian values as that is the native
411 * format of the Rx descriptor. The ordering of these fields is reversed
412 * from the actual ftag header to allow for a single bswap to take care
413 * of placing all of the values in network order
415 union fm10k_ftag_info
{
418 /* dglort and sglort combined into a single 32bit desc read */
420 /* upper 16 bits of vlan are reserved 0 for swpri_type_user */
427 __le16 swpri_type_user
;
434 unsigned long ts_tx_timeout
;
436 union fm10k_ftag_info fi
;
439 #define FM10K_CB(skb) ((struct fm10k_cb *)(skb)->cb)
442 extern char fm10k_driver_name
[];
443 extern const char fm10k_driver_version
[];
444 int fm10k_init_queueing_scheme(struct fm10k_intfc
*interface
);
445 void fm10k_clear_queueing_scheme(struct fm10k_intfc
*interface
);
446 netdev_tx_t
fm10k_xmit_frame_ring(struct sk_buff
*skb
,
447 struct fm10k_ring
*tx_ring
);
448 void fm10k_tx_timeout_reset(struct fm10k_intfc
*interface
);
449 bool fm10k_check_tx_hang(struct fm10k_ring
*tx_ring
);
450 void fm10k_alloc_rx_buffers(struct fm10k_ring
*rx_ring
, u16 cleaned_count
);
453 void fm10k_mbx_free_irq(struct fm10k_intfc
*);
454 int fm10k_mbx_request_irq(struct fm10k_intfc
*);
455 void fm10k_qv_free_irq(struct fm10k_intfc
*interface
);
456 int fm10k_qv_request_irq(struct fm10k_intfc
*interface
);
457 int fm10k_register_pci_driver(void);
458 void fm10k_unregister_pci_driver(void);
459 void fm10k_up(struct fm10k_intfc
*interface
);
460 void fm10k_down(struct fm10k_intfc
*interface
);
461 void fm10k_update_stats(struct fm10k_intfc
*interface
);
462 void fm10k_service_event_schedule(struct fm10k_intfc
*interface
);
463 void fm10k_update_rx_drop_en(struct fm10k_intfc
*interface
);
466 struct net_device
*fm10k_alloc_netdev(void);
467 int fm10k_setup_rx_resources(struct fm10k_ring
*);
468 int fm10k_setup_tx_resources(struct fm10k_ring
*);
469 void fm10k_free_rx_resources(struct fm10k_ring
*);
470 void fm10k_free_tx_resources(struct fm10k_ring
*);
471 void fm10k_clean_all_rx_rings(struct fm10k_intfc
*);
472 void fm10k_clean_all_tx_rings(struct fm10k_intfc
*);
473 void fm10k_unmap_and_free_tx_resource(struct fm10k_ring
*,
474 struct fm10k_tx_buffer
*);
475 void fm10k_restore_rx_state(struct fm10k_intfc
*);
476 void fm10k_reset_rx_state(struct fm10k_intfc
*);
477 int fm10k_setup_tc(struct net_device
*dev
, u8 tc
);
478 int fm10k_open(struct net_device
*netdev
);
479 int fm10k_close(struct net_device
*netdev
);
482 void fm10k_set_ethtool_ops(struct net_device
*dev
);
485 s32
fm10k_iov_event(struct fm10k_intfc
*interface
);
486 s32
fm10k_iov_mbx(struct fm10k_intfc
*interface
);
487 void fm10k_iov_suspend(struct pci_dev
*pdev
);
488 int fm10k_iov_resume(struct pci_dev
*pdev
);
489 void fm10k_iov_disable(struct pci_dev
*pdev
);
490 int fm10k_iov_configure(struct pci_dev
*pdev
, int num_vfs
);
491 s32
fm10k_iov_update_pvid(struct fm10k_intfc
*interface
, u16 glort
, u16 pvid
);
492 int fm10k_ndo_set_vf_mac(struct net_device
*netdev
, int vf_idx
, u8
*mac
);
493 int fm10k_ndo_set_vf_vlan(struct net_device
*netdev
,
494 int vf_idx
, u16 vid
, u8 qos
);
495 int fm10k_ndo_set_vf_bw(struct net_device
*netdev
, int vf_idx
, int rate
,
497 int fm10k_ndo_get_vf_config(struct net_device
*netdev
,
498 int vf_idx
, struct ifla_vf_info
*ivi
);
501 #ifdef CONFIG_DEBUG_FS
502 void fm10k_dbg_q_vector_init(struct fm10k_q_vector
*q_vector
);
503 void fm10k_dbg_q_vector_exit(struct fm10k_q_vector
*q_vector
);
504 void fm10k_dbg_intfc_init(struct fm10k_intfc
*interface
);
505 void fm10k_dbg_intfc_exit(struct fm10k_intfc
*interface
);
506 void fm10k_dbg_init(void);
507 void fm10k_dbg_exit(void);
509 static inline void fm10k_dbg_q_vector_init(struct fm10k_q_vector
*q_vector
) {}
510 static inline void fm10k_dbg_q_vector_exit(struct fm10k_q_vector
*q_vector
) {}
511 static inline void fm10k_dbg_intfc_init(struct fm10k_intfc
*interface
) {}
512 static inline void fm10k_dbg_intfc_exit(struct fm10k_intfc
*interface
) {}
513 static inline void fm10k_dbg_init(void) {}
514 static inline void fm10k_dbg_exit(void) {}
515 #endif /* CONFIG_DEBUG_FS */
518 void fm10k_systime_to_hwtstamp(struct fm10k_intfc
*interface
,
519 struct skb_shared_hwtstamps
*hwtstamp
,
521 void fm10k_ts_tx_enqueue(struct fm10k_intfc
*interface
, struct sk_buff
*skb
);
522 void fm10k_ts_tx_hwtstamp(struct fm10k_intfc
*interface
, __le16 dglort
,
524 void fm10k_ts_reset(struct fm10k_intfc
*interface
);
525 void fm10k_ts_init(struct fm10k_intfc
*interface
);
526 void fm10k_ts_tx_subtask(struct fm10k_intfc
*interface
);
527 void fm10k_ptp_register(struct fm10k_intfc
*interface
);
528 void fm10k_ptp_unregister(struct fm10k_intfc
*interface
);
529 int fm10k_get_ts_config(struct net_device
*netdev
, struct ifreq
*ifr
);
530 int fm10k_set_ts_config(struct net_device
*netdev
, struct ifreq
*ifr
);
533 void fm10k_dcbnl_set_ops(struct net_device
*dev
);
534 #endif /* _FM10K_H_ */