1 /* Intel(R) Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2016 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/cpumask.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/if_vlan.h>
29 #include <linux/pci.h>
34 #define FM10K_MAX_JUMBO_FRAME_SIZE 15342 /* Maximum supported size 15K */
36 #define MAX_QUEUES FM10K_MAX_QUEUES_PF
38 #define FM10K_MIN_RXD 128
39 #define FM10K_MAX_RXD 4096
40 #define FM10K_DEFAULT_RXD 256
42 #define FM10K_MIN_TXD 128
43 #define FM10K_MAX_TXD 4096
44 #define FM10K_DEFAULT_TXD 256
45 #define FM10K_DEFAULT_TX_WORK 256
47 #define FM10K_RXBUFFER_256 256
48 #define FM10K_RX_HDR_LEN FM10K_RXBUFFER_256
49 #define FM10K_RXBUFFER_2048 2048
50 #define FM10K_RX_BUFSZ FM10K_RXBUFFER_2048
52 /* How many Rx Buffers do we bundle into one write to the hardware ? */
53 #define FM10K_RX_BUFFER_WRITE 16 /* Must be power of 2 */
55 #define FM10K_MAX_STATIONS 63
56 struct fm10k_l2_accel {
61 struct net_device *macvlan[0];
64 enum fm10k_ring_state_t {
65 __FM10K_TX_DETECT_HANG,
66 __FM10K_HANG_CHECK_ARMED,
67 __FM10K_TX_XPS_INIT_DONE,
70 #define check_for_tx_hang(ring) \
71 test_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
72 #define set_check_for_tx_hang(ring) \
73 set_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
74 #define clear_check_for_tx_hang(ring) \
75 clear_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
77 struct fm10k_tx_buffer {
78 struct fm10k_tx_desc *next_to_watch;
80 unsigned int bytecount;
83 DEFINE_DMA_UNMAP_ADDR(dma);
84 DEFINE_DMA_UNMAP_LEN(len);
87 struct fm10k_rx_buffer {
93 struct fm10k_queue_stats {
98 struct fm10k_tx_queue_stats {
106 struct fm10k_rx_queue_stats {
119 struct fm10k_q_vector *q_vector;/* backpointer to host q_vector */
120 struct net_device *netdev; /* netdev ring belongs to */
121 struct device *dev; /* device for DMA mapping */
122 struct fm10k_l2_accel __rcu *l2_accel; /* L2 acceleration list */
123 void *desc; /* descriptor ring memory */
125 struct fm10k_tx_buffer *tx_buffer;
126 struct fm10k_rx_buffer *rx_buffer;
130 dma_addr_t dma; /* phys. address of descriptor ring */
131 unsigned int size; /* length in bytes */
133 u8 queue_index; /* needed for queue management */
134 u8 reg_idx; /* holds the special value that gets
135 * the hardware register offset
136 * associated with this ring, which is
137 * different for DCB and RSS modes
139 u8 qos_pc; /* priority class of queue */
140 u16 vid; /* default VLAN ID of queue */
141 u16 count; /* amount of descriptors */
147 struct fm10k_queue_stats stats;
148 struct u64_stats_sync syncp;
151 struct fm10k_tx_queue_stats tx_stats;
154 struct fm10k_rx_queue_stats rx_stats;
158 } ____cacheline_internodealigned_in_smp;
160 struct fm10k_ring_container {
161 struct fm10k_ring *ring; /* pointer to linked list of rings */
162 unsigned int total_bytes; /* total bytes processed this int */
163 unsigned int total_packets; /* total packets processed this int */
164 u16 work_limit; /* total work allowed per interrupt */
165 u16 itr; /* interrupt throttle rate value */
166 u8 itr_scale; /* ITR adjustment based on PCI speed */
167 u8 count; /* total number of rings in vector */
170 #define FM10K_ITR_MAX 0x0FFF /* maximum value for ITR */
171 #define FM10K_ITR_10K 100 /* 100us */
172 #define FM10K_ITR_20K 50 /* 50us */
173 #define FM10K_ITR_40K 25 /* 25us */
174 #define FM10K_ITR_ADAPTIVE 0x8000 /* adaptive interrupt moderation flag */
176 #define ITR_IS_ADAPTIVE(itr) (!!(itr & FM10K_ITR_ADAPTIVE))
178 #define FM10K_TX_ITR_DEFAULT FM10K_ITR_40K
179 #define FM10K_RX_ITR_DEFAULT FM10K_ITR_20K
180 #define FM10K_ITR_ENABLE (FM10K_ITR_AUTOMASK | FM10K_ITR_MASK_CLEAR)
182 static inline struct netdev_queue *txring_txq(const struct fm10k_ring *ring)
184 return &ring->netdev->_tx[ring->queue_index];
187 /* iterator for handling rings in ring container */
188 #define fm10k_for_each_ring(pos, head) \
189 for (pos = &(head).ring[(head).count]; (--pos) >= (head).ring;)
191 #define MAX_Q_VECTORS 256
192 #define MIN_Q_VECTORS 1
193 enum fm10k_non_q_vectors {
195 #define NON_Q_VECTORS_VF NON_Q_VECTORS_PF
199 #define NON_Q_VECTORS(hw) (((hw)->mac.type == fm10k_mac_pf) ? \
202 #define MIN_MSIX_COUNT(hw) (MIN_Q_VECTORS + NON_Q_VECTORS(hw))
204 struct fm10k_q_vector {
205 struct fm10k_intfc *interface;
206 u32 __iomem *itr; /* pointer to ITR register for this vector */
207 u16 v_idx; /* index of q_vector within interface array */
208 struct fm10k_ring_container rx, tx;
210 struct napi_struct napi;
211 cpumask_t affinity_mask;
212 char name[IFNAMSIZ + 9];
214 #ifdef CONFIG_DEBUG_FS
215 struct dentry *dbg_q_vector;
216 #endif /* CONFIG_DEBUG_FS */
217 struct rcu_head rcu; /* to avoid race with update stats on free */
219 /* for dynamic allocation of rings associated with this q_vector */
220 struct fm10k_ring ring[0] ____cacheline_internodealigned_in_smp;
223 enum fm10k_ring_f_enum {
226 RING_F_ARRAY_SIZE /* must be last in enum set */
229 struct fm10k_ring_feature {
230 u16 limit; /* upper limit on feature indices */
231 u16 indices; /* current value of indices */
232 u16 mask; /* Mask used for feature to ring mapping */
233 u16 offset; /* offset to start of feature */
236 struct fm10k_iov_data {
237 unsigned int num_vfs;
238 unsigned int next_vf_mbx;
240 struct fm10k_vf_info vf_info[0];
243 struct fm10k_udp_port {
244 struct list_head list;
245 sa_family_t sa_family;
249 /* one work queue for entire driver */
250 extern struct workqueue_struct *fm10k_workqueue;
253 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
254 struct net_device *netdev;
255 struct fm10k_l2_accel *l2_accel; /* pointer to L2 acceleration list */
256 struct pci_dev *pdev;
260 #define FM10K_FLAG_RESET_REQUESTED (u32)(BIT(0))
261 #define FM10K_FLAG_RSS_FIELD_IPV4_UDP (u32)(BIT(1))
262 #define FM10K_FLAG_RSS_FIELD_IPV6_UDP (u32)(BIT(2))
263 #define FM10K_FLAG_RX_TS_ENABLED (u32)(BIT(3))
264 #define FM10K_FLAG_SWPRI_CONFIG (u32)(BIT(4))
265 #define FM10K_FLAG_DEBUG_STATS (u32)(BIT(5))
268 /* Tx fast path data */
272 /* Rx fast path data */
277 struct fm10k_ring *tx_ring[MAX_QUEUES] ____cacheline_aligned_in_smp;
293 /* Debug Statistics */
297 u64 rx_switch_errors;
301 u64 rx_length_errors;
303 u32 tx_timeout_count;
306 struct fm10k_ring *rx_ring[MAX_QUEUES];
308 /* Queueing vectors */
309 struct fm10k_q_vector *q_vector[MAX_Q_VECTORS];
310 struct msix_entry *msix_entries;
311 int num_q_vectors; /* current number of q_vectors for device */
312 struct fm10k_ring_feature ring_feature[RING_F_ARRAY_SIZE];
314 /* SR-IOV information management structure */
315 struct fm10k_iov_data *iov_data;
317 struct fm10k_hw_stats stats;
319 u32 __iomem *uc_addr;
320 u32 __iomem *sw_addr;
324 struct timer_list service_timer;
325 struct work_struct service_task;
326 unsigned long next_stats_update;
327 unsigned long next_tx_hang_check;
328 unsigned long last_reset;
329 unsigned long link_down_event;
331 bool lport_map_failed;
333 u32 reta[FM10K_RETA_SIZE];
334 u32 rssrk[FM10K_RSSRK_SIZE];
336 /* UDP encapsulation port tracking information */
337 struct list_head vxlan_port;
338 struct list_head geneve_port;
340 #ifdef CONFIG_DEBUG_FS
341 struct dentry *dbg_intfc;
342 #endif /* CONFIG_DEBUG_FS */
349 /* GLORT resources in use by PF */
353 /* VLAN ID for updating multicast/unicast lists */
360 __FM10K_SERVICE_SCHED,
361 __FM10K_SERVICE_DISABLE,
364 __FM10K_UPDATING_STATS,
367 static inline void fm10k_mbx_lock(struct fm10k_intfc *interface)
369 /* busy loop if we cannot obtain the lock as some calls
370 * such as ndo_set_rx_mode may be made in atomic context
372 while (test_and_set_bit(__FM10K_MBX_LOCK, &interface->state))
376 static inline void fm10k_mbx_unlock(struct fm10k_intfc *interface)
378 /* flush memory to make sure state is correct */
379 smp_mb__before_atomic();
380 clear_bit(__FM10K_MBX_LOCK, &interface->state);
383 static inline int fm10k_mbx_trylock(struct fm10k_intfc *interface)
385 return !test_and_set_bit(__FM10K_MBX_LOCK, &interface->state);
388 /* fm10k_test_staterr - test bits in Rx descriptor status and error fields */
389 static inline __le32 fm10k_test_staterr(union fm10k_rx_desc *rx_desc,
390 const u32 stat_err_bits)
392 return rx_desc->d.staterr & cpu_to_le32(stat_err_bits);
395 /* fm10k_desc_unused - calculate if we have unused descriptors */
396 static inline u16 fm10k_desc_unused(struct fm10k_ring *ring)
398 s16 unused = ring->next_to_clean - ring->next_to_use - 1;
400 return likely(unused < 0) ? unused + ring->count : unused;
403 #define FM10K_TX_DESC(R, i) \
404 (&(((struct fm10k_tx_desc *)((R)->desc))[i]))
405 #define FM10K_RX_DESC(R, i) \
406 (&(((union fm10k_rx_desc *)((R)->desc))[i]))
408 #define FM10K_MAX_TXD_PWR 14
409 #define FM10K_MAX_DATA_PER_TXD (1u << FM10K_MAX_TXD_PWR)
411 /* Tx Descriptors needed, worst case */
412 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), FM10K_MAX_DATA_PER_TXD)
413 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
415 enum fm10k_tx_flags {
416 /* Tx offload flags */
417 FM10K_TX_FLAGS_CSUM = 0x01,
420 /* This structure is stored as little endian values as that is the native
421 * format of the Rx descriptor. The ordering of these fields is reversed
422 * from the actual ftag header to allow for a single bswap to take care
423 * of placing all of the values in network order
425 union fm10k_ftag_info {
428 /* dglort and sglort combined into a single 32bit desc read */
430 /* upper 16 bits of VLAN are reserved 0 for swpri_type_user */
437 __le16 swpri_type_user;
444 unsigned long ts_tx_timeout;
446 union fm10k_ftag_info fi;
449 #define FM10K_CB(skb) ((struct fm10k_cb *)(skb)->cb)
452 extern char fm10k_driver_name[];
453 extern const char fm10k_driver_version[];
454 int fm10k_init_queueing_scheme(struct fm10k_intfc *interface);
455 void fm10k_clear_queueing_scheme(struct fm10k_intfc *interface);
456 __be16 fm10k_tx_encap_offload(struct sk_buff *skb);
457 netdev_tx_t fm10k_xmit_frame_ring(struct sk_buff *skb,
458 struct fm10k_ring *tx_ring);
459 void fm10k_tx_timeout_reset(struct fm10k_intfc *interface);
460 u64 fm10k_get_tx_pending(struct fm10k_ring *ring, bool in_sw);
461 bool fm10k_check_tx_hang(struct fm10k_ring *tx_ring);
462 void fm10k_alloc_rx_buffers(struct fm10k_ring *rx_ring, u16 cleaned_count);
465 void fm10k_mbx_free_irq(struct fm10k_intfc *);
466 int fm10k_mbx_request_irq(struct fm10k_intfc *);
467 void fm10k_qv_free_irq(struct fm10k_intfc *interface);
468 int fm10k_qv_request_irq(struct fm10k_intfc *interface);
469 int fm10k_register_pci_driver(void);
470 void fm10k_unregister_pci_driver(void);
471 void fm10k_up(struct fm10k_intfc *interface);
472 void fm10k_down(struct fm10k_intfc *interface);
473 void fm10k_update_stats(struct fm10k_intfc *interface);
474 void fm10k_service_event_schedule(struct fm10k_intfc *interface);
475 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface);
476 #ifdef CONFIG_NET_POLL_CONTROLLER
477 void fm10k_netpoll(struct net_device *netdev);
481 struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info);
482 int fm10k_setup_rx_resources(struct fm10k_ring *);
483 int fm10k_setup_tx_resources(struct fm10k_ring *);
484 void fm10k_free_rx_resources(struct fm10k_ring *);
485 void fm10k_free_tx_resources(struct fm10k_ring *);
486 void fm10k_clean_all_rx_rings(struct fm10k_intfc *);
487 void fm10k_clean_all_tx_rings(struct fm10k_intfc *);
488 void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *,
489 struct fm10k_tx_buffer *);
490 void fm10k_restore_rx_state(struct fm10k_intfc *);
491 void fm10k_reset_rx_state(struct fm10k_intfc *);
492 int fm10k_setup_tc(struct net_device *dev, u8 tc);
493 int fm10k_open(struct net_device *netdev);
494 int fm10k_close(struct net_device *netdev);
497 void fm10k_set_ethtool_ops(struct net_device *dev);
498 void fm10k_write_reta(struct fm10k_intfc *interface, const u32 *indir);
501 s32 fm10k_iov_event(struct fm10k_intfc *interface);
502 s32 fm10k_iov_mbx(struct fm10k_intfc *interface);
503 void fm10k_iov_suspend(struct pci_dev *pdev);
504 int fm10k_iov_resume(struct pci_dev *pdev);
505 void fm10k_iov_disable(struct pci_dev *pdev);
506 int fm10k_iov_configure(struct pci_dev *pdev, int num_vfs);
507 s32 fm10k_iov_update_pvid(struct fm10k_intfc *interface, u16 glort, u16 pvid);
508 int fm10k_ndo_set_vf_mac(struct net_device *netdev, int vf_idx, u8 *mac);
509 int fm10k_ndo_set_vf_vlan(struct net_device *netdev,
510 int vf_idx, u16 vid, u8 qos, __be16 vlan_proto);
511 int fm10k_ndo_set_vf_bw(struct net_device *netdev, int vf_idx,
512 int __always_unused min_rate, int max_rate);
513 int fm10k_ndo_get_vf_config(struct net_device *netdev,
514 int vf_idx, struct ifla_vf_info *ivi);
517 #ifdef CONFIG_DEBUG_FS
518 void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector);
519 void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector);
520 void fm10k_dbg_intfc_init(struct fm10k_intfc *interface);
521 void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface);
522 void fm10k_dbg_init(void);
523 void fm10k_dbg_exit(void);
525 static inline void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector) {}
526 static inline void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector) {}
527 static inline void fm10k_dbg_intfc_init(struct fm10k_intfc *interface) {}
528 static inline void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface) {}
529 static inline void fm10k_dbg_init(void) {}
530 static inline void fm10k_dbg_exit(void) {}
531 #endif /* CONFIG_DEBUG_FS */
535 void fm10k_dcbnl_set_ops(struct net_device *dev);
537 static inline void fm10k_dcbnl_set_ops(struct net_device *dev) {}
539 #endif /* _FM10K_H_ */