1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2012 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 {
51 unsigned long time_stamp;
52 union ixgbe_adv_tx_desc *next_to_watch;
57 struct ixgbevf_rx_buffer {
63 struct ixgbevf_ring *next;
64 struct net_device *netdev;
66 void *desc; /* descriptor ring memory */
67 dma_addr_t dma; /* phys. address of descriptor ring */
68 unsigned int size; /* length in bytes */
69 unsigned int count; /* amount of descriptors */
70 unsigned int next_to_use;
71 unsigned int next_to_clean;
73 int queue_index; /* needed for multiqueue queue management */
75 struct ixgbevf_tx_buffer *tx_buffer_info;
76 struct ixgbevf_rx_buffer *rx_buffer_info;
81 struct u64_stats_sync syncp;
84 #ifdef BP_EXTENDED_STATS
93 u16 reg_idx; /* holds the special value that gets the hardware register
94 * offset associated with this ring, which is different
95 * for DCB and RSS modes */
100 /* How many Rx Buffers do we bundle into one write to the hardware ? */
101 #define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
103 #define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
104 #define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
106 #define IXGBEVF_DEFAULT_TXD 1024
107 #define IXGBEVF_DEFAULT_RXD 512
108 #define IXGBEVF_MAX_TXD 4096
109 #define IXGBEVF_MIN_TXD 64
110 #define IXGBEVF_MAX_RXD 4096
111 #define IXGBEVF_MIN_RXD 64
113 /* Supported Rx Buffer Sizes */
114 #define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
115 #define IXGBEVF_RXBUFFER_2K 2048
116 #define IXGBEVF_RXBUFFER_4K 4096
117 #define IXGBEVF_RXBUFFER_8K 8192
118 #define IXGBEVF_RXBUFFER_10K 10240
120 #define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
122 #define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
124 #define IXGBE_TX_FLAGS_CSUM (u32)(1)
125 #define IXGBE_TX_FLAGS_VLAN (u32)(1 << 1)
126 #define IXGBE_TX_FLAGS_TSO (u32)(1 << 2)
127 #define IXGBE_TX_FLAGS_IPV4 (u32)(1 << 3)
128 #define IXGBE_TX_FLAGS_FCOE (u32)(1 << 4)
129 #define IXGBE_TX_FLAGS_FSO (u32)(1 << 5)
130 #define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
131 #define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
132 #define IXGBE_TX_FLAGS_VLAN_SHIFT 16
134 struct ixgbevf_ring_container {
135 struct ixgbevf_ring *ring; /* pointer to linked list of rings */
136 unsigned int total_bytes; /* total bytes processed this int */
137 unsigned int total_packets; /* total packets processed this int */
138 u8 count; /* total number of rings in vector */
139 u8 itr; /* current ITR setting for ring */
142 /* iterator for handling rings in ring container */
143 #define ixgbevf_for_each_ring(pos, head) \
144 for (pos = (head).ring; pos != NULL; pos = pos->next)
146 /* MAX_MSIX_Q_VECTORS of these are allocated,
147 * but we only use one per queue-specific vector.
149 struct ixgbevf_q_vector {
150 struct ixgbevf_adapter *adapter;
151 u16 v_idx; /* index of q_vector within array, also used for
152 * finding the bit in EICR and friends that
153 * represents the vector for this ring */
154 u16 itr; /* Interrupt throttle rate written to EITR */
155 struct napi_struct napi;
156 struct ixgbevf_ring_container rx, tx;
157 char name[IFNAMSIZ + 9];
158 #ifdef CONFIG_NET_RX_BUSY_POLL
160 #define IXGBEVF_QV_STATE_IDLE 0
161 #define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
162 #define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
163 #define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
164 #define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
165 #define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
166 #define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
167 #define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
168 #define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | IXGBEVF_QV_STATE_POLL_YIELD)
169 #define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | IXGBEVF_QV_STATE_POLL_YIELD)
171 #endif /* CONFIG_NET_RX_BUSY_POLL */
173 #ifdef CONFIG_NET_RX_BUSY_POLL
174 static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
177 spin_lock_init(&q_vector->lock);
178 q_vector->state = IXGBEVF_QV_STATE_IDLE;
181 /* called from the device poll routine to get ownership of a q_vector */
182 static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
185 spin_lock_bh(&q_vector->lock);
186 if (q_vector->state & IXGBEVF_QV_LOCKED) {
187 WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
188 q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
190 #ifdef BP_EXTENDED_STATS
191 q_vector->tx.ring->bp_yields++;
194 /* we don't care if someone yielded */
195 q_vector->state = IXGBEVF_QV_STATE_NAPI;
197 spin_unlock_bh(&q_vector->lock);
201 /* returns true is someone tried to get the qv while napi had it */
202 static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
205 spin_lock_bh(&q_vector->lock);
206 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
207 IXGBEVF_QV_STATE_NAPI_YIELD));
209 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
211 /* reset state to idle, unless QV is disabled */
212 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
213 spin_unlock_bh(&q_vector->lock);
217 /* called from ixgbevf_low_latency_poll() */
218 static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
221 spin_lock_bh(&q_vector->lock);
222 if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
223 q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
225 #ifdef BP_EXTENDED_STATS
226 q_vector->rx.ring->bp_yields++;
229 /* preserve yield marks */
230 q_vector->state |= IXGBEVF_QV_STATE_POLL;
232 spin_unlock_bh(&q_vector->lock);
236 /* returns true if someone tried to get the qv while it was locked */
237 static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
240 spin_lock_bh(&q_vector->lock);
241 WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
243 if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
245 /* reset state to idle, unless QV is disabled */
246 q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
247 spin_unlock_bh(&q_vector->lock);
251 /* true if a socket is polling, even if it did not get the lock */
252 static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
254 WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
255 return q_vector->state & IXGBEVF_QV_USER_PEND;
258 /* false if QV is currently owned */
259 static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
262 spin_lock_bh(&q_vector->lock);
263 if (q_vector->state & IXGBEVF_QV_OWNED)
265 spin_unlock_bh(&q_vector->lock);
269 #endif /* CONFIG_NET_RX_BUSY_POLL */
272 * microsecond values for various ITR rates shifted by 2 to fit itr register
273 * with the first 3 bits reserved 0
275 #define IXGBE_MIN_RSC_ITR 24
276 #define IXGBE_100K_ITR 40
277 #define IXGBE_20K_ITR 200
278 #define IXGBE_10K_ITR 400
279 #define IXGBE_8K_ITR 500
281 /* Helper macros to switch between ints/sec and what the register uses.
282 * And yes, it's the same math going both ways. The lowest value
283 * supported by all of the ixgbe hardware is 8.
285 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
286 ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
287 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
289 static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
291 u16 ntc = ring->next_to_clean;
292 u16 ntu = ring->next_to_use;
294 return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
297 #define IXGBEVF_RX_DESC(R, i) \
298 (&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
299 #define IXGBEVF_TX_DESC(R, i) \
300 (&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
301 #define IXGBEVF_TX_CTXTDESC(R, i) \
302 (&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
304 #define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
306 #define OTHER_VECTOR 1
307 #define NON_Q_VECTORS (OTHER_VECTOR)
309 #define MAX_MSIX_Q_VECTORS 2
311 #define MIN_MSIX_Q_VECTORS 1
312 #define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
314 /* board specific private data structure */
315 struct ixgbevf_adapter {
316 struct timer_list watchdog_timer;
317 unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
319 struct work_struct reset_task;
320 struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
322 /* Interrupt Throttle Rate */
326 /* interrupt masks */
327 u32 eims_enable_mask;
331 struct ixgbevf_ring *tx_ring; /* One per active queue */
338 u32 tx_timeout_count;
341 struct ixgbevf_ring *rx_ring; /* One per active queue */
343 u64 hw_csum_rx_error;
344 u64 hw_rx_no_dma_resources;
347 int num_msix_vectors;
348 struct msix_entry *msix_entries;
350 u32 alloc_rx_page_failed;
351 u32 alloc_rx_buff_failed;
353 /* Some features need tri-state capability,
354 * thus the additional *_CAPABLE flags.
357 #define IXGBE_FLAG_IN_WATCHDOG_TASK (u32)(1)
358 #define IXGBE_FLAG_IN_NETPOLL (u32)(1 << 1)
360 /* OS defined structs */
361 struct net_device *netdev;
362 struct pci_dev *pdev;
364 /* structs defined in ixgbe_vf.h */
367 struct ixgbevf_hw_stats stats;
368 /* Interrupt Throttle Rate */
373 unsigned int tx_ring_count;
374 unsigned int rx_ring_count;
376 #ifdef BP_EXTENDED_STATS
389 struct work_struct watchdog_task;
394 enum ixbgevf_state_t {
401 struct sk_buff *prev;
403 #define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
405 enum ixgbevf_boards {
410 extern const struct ixgbevf_info ixgbevf_82599_vf_info;
411 extern const struct ixgbevf_info ixgbevf_X540_vf_info;
412 extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
414 /* needed by ethtool.c */
415 extern const char ixgbevf_driver_name[];
416 extern const char ixgbevf_driver_version[];
418 void ixgbevf_up(struct ixgbevf_adapter *adapter);
419 void ixgbevf_down(struct ixgbevf_adapter *adapter);
420 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
421 void ixgbevf_reset(struct ixgbevf_adapter *adapter);
422 void ixgbevf_set_ethtool_ops(struct net_device *netdev);
423 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *, struct ixgbevf_ring *);
424 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *, struct ixgbevf_ring *);
425 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *, struct ixgbevf_ring *);
426 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *, struct ixgbevf_ring *);
427 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
428 int ethtool_ioctl(struct ifreq *ifr);
430 extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
432 void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
433 void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
436 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
437 #define hw_dbg(hw, format, arg...) \
438 printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
440 #define hw_dbg(hw, format, arg...) do {} while (0)
443 #endif /* _IXGBEVF_H_ */