2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
37 #include <linux/bitops.h>
38 #include <linux/compiler.h>
39 #include <linux/list.h>
40 #include <linux/mutex.h>
41 #include <linux/netdevice.h>
42 #include <linux/if_vlan.h>
43 #ifdef CONFIG_MLX4_EN_DCB
44 #include <linux/dcbnl.h>
47 #include <linux/mlx4/device.h>
48 #include <linux/mlx4/qp.h>
49 #include <linux/mlx4/cq.h>
50 #include <linux/mlx4/srq.h>
51 #include <linux/mlx4/doorbell.h>
52 #include <linux/mlx4/cmd.h>
56 #define DRV_NAME "mlx4_en"
57 #define DRV_VERSION "2.0"
58 #define DRV_RELDATE "Dec 2011"
60 #define MLX4_EN_MSG_LEVEL (NETIF_MSG_LINK | NETIF_MSG_IFDOWN)
67 #define MLX4_EN_PAGE_SHIFT 12
68 #define MLX4_EN_PAGE_SIZE (1 << MLX4_EN_PAGE_SHIFT)
69 #define MAX_RX_RINGS 16
70 #define MIN_RX_RINGS 4
72 #define HEADROOM (2048 / TXBB_SIZE + 1)
73 #define STAMP_STRIDE 64
74 #define STAMP_DWORDS (STAMP_STRIDE / 4)
75 #define STAMP_SHIFT 31
76 #define STAMP_VAL 0x7fffffff
77 #define STATS_DELAY (HZ / 4)
79 /* Typical TSO descriptor with 16 gather entries is 352 bytes... */
80 #define MAX_DESC_SIZE 512
81 #define MAX_DESC_TXBBS (MAX_DESC_SIZE / TXBB_SIZE)
84 * OS related constants and tunables
87 #define MLX4_EN_WATCHDOG_TIMEOUT (15 * HZ)
89 #define MLX4_EN_ALLOC_ORDER 2
90 #define MLX4_EN_ALLOC_SIZE (PAGE_SIZE << MLX4_EN_ALLOC_ORDER)
92 #define MLX4_EN_MAX_LRO_DESCRIPTORS 32
94 /* Receive fragment sizes; we use at most 4 fragments (for 9600 byte MTU
95 * and 4K allocations) */
97 FRAG_SZ0
= 512 - NET_IP_ALIGN
,
100 FRAG_SZ3
= MLX4_EN_ALLOC_SIZE
102 #define MLX4_EN_MAX_RX_FRAGS 4
104 /* Maximum ring sizes */
105 #define MLX4_EN_MAX_TX_SIZE 8192
106 #define MLX4_EN_MAX_RX_SIZE 8192
108 /* Minimum ring size for our page-allocation sceme to work */
109 #define MLX4_EN_MIN_RX_SIZE (MLX4_EN_ALLOC_SIZE / SMP_CACHE_BYTES)
110 #define MLX4_EN_MIN_TX_SIZE (4096 / TXBB_SIZE)
112 #define MLX4_EN_SMALL_PKT_SIZE 64
113 #define MLX4_EN_NUM_TX_RINGS 8
114 #define MLX4_EN_NUM_PPP_RINGS 8
115 #define MAX_TX_RINGS (MLX4_EN_NUM_TX_RINGS + MLX4_EN_NUM_PPP_RINGS)
116 #define MLX4_EN_NUM_UP 8
117 #define MLX4_EN_DEF_TX_RING_SIZE 512
118 #define MLX4_EN_DEF_RX_RING_SIZE 1024
120 /* Target number of packets to coalesce with interrupt moderation */
121 #define MLX4_EN_RX_COAL_TARGET 44
122 #define MLX4_EN_RX_COAL_TIME 0x10
124 #define MLX4_EN_TX_COAL_PKTS 5
125 #define MLX4_EN_TX_COAL_TIME 0x80
127 #define MLX4_EN_RX_RATE_LOW 400000
128 #define MLX4_EN_RX_COAL_TIME_LOW 0
129 #define MLX4_EN_RX_RATE_HIGH 450000
130 #define MLX4_EN_RX_COAL_TIME_HIGH 128
131 #define MLX4_EN_RX_SIZE_THRESH 1024
132 #define MLX4_EN_RX_RATE_THRESH (1000000 / MLX4_EN_RX_COAL_TIME_HIGH)
133 #define MLX4_EN_SAMPLE_INTERVAL 0
134 #define MLX4_EN_AVG_PKT_SMALL 256
136 #define MLX4_EN_AUTO_CONF 0xffff
138 #define MLX4_EN_DEF_RX_PAUSE 1
139 #define MLX4_EN_DEF_TX_PAUSE 1
141 /* Interval between successive polls in the Tx routine when polling is used
142 instead of interrupts (in per-core Tx rings) - should be power of 2 */
143 #define MLX4_EN_TX_POLL_MODER 16
144 #define MLX4_EN_TX_POLL_TIMEOUT (HZ / 4)
146 #define ETH_LLC_SNAP_SIZE 8
148 #define SMALL_PACKET_SIZE (256 - NET_IP_ALIGN)
149 #define HEADER_COPY_SIZE (128 - NET_IP_ALIGN)
150 #define MLX4_LOOPBACK_TEST_PAYLOAD (HEADER_COPY_SIZE - ETH_HLEN)
152 #define MLX4_EN_MIN_MTU 46
153 #define ETH_BCAST 0xffffffffffffULL
155 #define MLX4_EN_LOOPBACK_RETRIES 5
156 #define MLX4_EN_LOOPBACK_TIMEOUT 100
158 #ifdef MLX4_EN_PERF_STAT
159 /* Number of samples to 'average' */
161 #define AVG_FACTOR 1024
162 #define NUM_PERF_STATS NUM_PERF_COUNTERS
164 #define INC_PERF_COUNTER(cnt) (++(cnt))
165 #define ADD_PERF_COUNTER(cnt, add) ((cnt) += (add))
166 #define AVG_PERF_COUNTER(cnt, sample) \
167 ((cnt) = ((cnt) * (AVG_SIZE - 1) + (sample) * AVG_FACTOR) / AVG_SIZE)
168 #define GET_PERF_COUNTER(cnt) (cnt)
169 #define GET_AVG_PERF_COUNTER(cnt) ((cnt) / AVG_FACTOR)
173 #define NUM_PERF_STATS 0
174 #define INC_PERF_COUNTER(cnt) do {} while (0)
175 #define ADD_PERF_COUNTER(cnt, add) do {} while (0)
176 #define AVG_PERF_COUNTER(cnt, sample) do {} while (0)
177 #define GET_PERF_COUNTER(cnt) (0)
178 #define GET_AVG_PERF_COUNTER(cnt) (0)
179 #endif /* MLX4_EN_PERF_STAT */
194 #define ROUNDUP_LOG2(x) ilog2(roundup_pow_of_two(x))
195 #define XNOR(x, y) (!(x) == !(y))
196 #define ILLEGAL_MAC(addr) (addr == 0xffffffffffffULL || addr == 0x0)
199 struct mlx4_en_tx_info
{
208 #define MLX4_EN_BIT_DESC_OWN 0x80000000
209 #define CTRL_SIZE sizeof(struct mlx4_wqe_ctrl_seg)
210 #define MLX4_EN_MEMTYPE_PAD 0x100
211 #define DS_SIZE sizeof(struct mlx4_wqe_data_seg)
214 struct mlx4_en_tx_desc
{
215 struct mlx4_wqe_ctrl_seg ctrl
;
217 struct mlx4_wqe_data_seg data
; /* at least one data segment */
218 struct mlx4_wqe_lso_seg lso
;
219 struct mlx4_wqe_inline_seg inl
;
223 #define MLX4_EN_USE_SRQ 0x01000000
225 #define MLX4_EN_CX3_LOW_ID 0x1000
226 #define MLX4_EN_CX3_HIGH_ID 0x1005
228 struct mlx4_en_rx_alloc
{
233 struct mlx4_en_tx_ring
{
234 struct mlx4_hwq_resources wqres
;
235 u32 size
; /* number of TXBBs */
238 u16 cqn
; /* index of port CQ associated with this ring */
246 struct mlx4_en_tx_info
*tx_info
;
250 struct mlx4_qp_context context
;
252 enum mlx4_qp_state qp_state
;
253 struct mlx4_srq dummy
;
255 unsigned long packets
;
256 unsigned long tx_csum
;
257 spinlock_t comp_lock
;
262 struct mlx4_en_rx_desc
{
263 /* actual number of entries depends on rx ring stride */
264 struct mlx4_wqe_data_seg data
[0];
267 struct mlx4_en_rx_ring
{
268 struct mlx4_hwq_resources wqres
;
269 struct mlx4_en_rx_alloc page_alloc
[MLX4_EN_MAX_RX_FRAGS
];
270 u32 size
; /* number of Rx descs*/
275 u16 cqn
; /* index of port CQ associated with this ring */
283 unsigned long packets
;
284 unsigned long csum_ok
;
285 unsigned long csum_none
;
289 static inline int mlx4_en_can_lro(__be16 status
)
291 return (status
& cpu_to_be16(MLX4_CQE_STATUS_IPV4
|
292 MLX4_CQE_STATUS_IPV4F
|
293 MLX4_CQE_STATUS_IPV6
|
294 MLX4_CQE_STATUS_IPV4OPT
|
295 MLX4_CQE_STATUS_TCP
|
296 MLX4_CQE_STATUS_UDP
|
297 MLX4_CQE_STATUS_IPOK
)) ==
298 cpu_to_be16(MLX4_CQE_STATUS_IPV4
|
299 MLX4_CQE_STATUS_IPOK
|
300 MLX4_CQE_STATUS_TCP
);
305 struct mlx4_hwq_resources wqres
;
308 struct net_device
*dev
;
309 struct napi_struct napi
;
310 /* Per-core Tx cq processing support */
311 struct timer_list timer
;
318 struct mlx4_cqe
*buf
;
319 #define MLX4_EN_OPCODE_ERROR 0x1e
322 struct mlx4_en_port_profile
{
335 struct mlx4_en_profile
{
342 struct mlx4_en_port_profile prof
[MLX4_MAX_PORTS
+ 1];
346 struct mlx4_dev
*dev
;
347 struct pci_dev
*pdev
;
348 struct mutex state_lock
;
349 struct net_device
*pndev
[MLX4_MAX_PORTS
+ 1];
352 struct mlx4_en_profile profile
;
354 struct workqueue_struct
*workqueue
;
355 struct device
*dma_device
;
356 void __iomem
*uar_map
;
357 struct mlx4_uar priv_uar
;
361 u8 mac_removed
[MLX4_MAX_PORTS
+ 1];
365 struct mlx4_en_rss_map
{
367 struct mlx4_qp qps
[MAX_RX_RINGS
];
368 enum mlx4_qp_state state
[MAX_RX_RINGS
];
369 struct mlx4_qp indir_qp
;
370 enum mlx4_qp_state indir_state
;
373 struct mlx4_en_port_state
{
379 struct mlx4_en_pkt_stats
{
380 unsigned long broadcast
;
381 unsigned long rx_prio
[8];
382 unsigned long tx_prio
[8];
383 #define NUM_PKT_STATS 17
386 struct mlx4_en_port_stats
{
387 unsigned long tso_packets
;
388 unsigned long queue_stopped
;
389 unsigned long wake_queue
;
390 unsigned long tx_timeout
;
391 unsigned long rx_alloc_failed
;
392 unsigned long rx_chksum_good
;
393 unsigned long rx_chksum_none
;
394 unsigned long tx_chksum_offload
;
395 #define NUM_PORT_STATS 8
398 struct mlx4_en_perf_stats
{
405 #define NUM_PERF_COUNTERS 6
408 struct mlx4_en_frag_info
{
410 u16 frag_prefix_size
;
417 #ifdef CONFIG_MLX4_EN_DCB
418 /* Minimal TC BW - setting to 0 will block traffic */
419 #define MLX4_EN_BW_MIN 1
420 #define MLX4_EN_BW_MAX 100 /* Utilize 100% of the line */
422 #define MLX4_EN_TC_ETS 7
426 struct mlx4_en_priv
{
427 struct mlx4_en_dev
*mdev
;
428 struct mlx4_en_port_profile
*prof
;
429 struct net_device
*dev
;
430 unsigned long active_vlans
[BITS_TO_LONGS(VLAN_N_VID
)];
431 struct net_device_stats stats
;
432 struct net_device_stats ret_stats
;
433 struct mlx4_en_port_state port_state
;
434 spinlock_t stats_lock
;
436 unsigned long last_moder_packets
[MAX_RX_RINGS
];
437 unsigned long last_moder_tx_packets
;
438 unsigned long last_moder_bytes
[MAX_RX_RINGS
];
439 unsigned long last_moder_jiffies
;
440 int last_moder_time
[MAX_RX_RINGS
];
450 u16 adaptive_rx_coal
;
453 u32 validate_loopback
;
455 struct mlx4_hwq_resources res
;
468 struct mlx4_en_rss_map rss_map
;
471 #define MLX4_EN_FLAG_PROMISC 0x1
472 #define MLX4_EN_FLAG_MC_PROMISC 0x2
476 struct mlx4_en_frag_info frag_info
[MLX4_EN_MAX_RX_FRAGS
];
480 struct mlx4_en_tx_ring tx_ring
[MAX_TX_RINGS
];
481 struct mlx4_en_rx_ring rx_ring
[MAX_RX_RINGS
];
482 struct mlx4_en_cq tx_cq
[MAX_TX_RINGS
];
483 struct mlx4_en_cq rx_cq
[MAX_RX_RINGS
];
484 struct work_struct mcast_task
;
485 struct work_struct mac_task
;
486 struct work_struct watchdog_task
;
487 struct work_struct linkstate_task
;
488 struct delayed_work stats_task
;
489 struct mlx4_en_perf_stats pstats
;
490 struct mlx4_en_pkt_stats pkstats
;
491 struct mlx4_en_port_stats port_stats
;
495 struct mlx4_en_stat_out_mbox hw_stats
;
500 #ifdef CONFIG_MLX4_EN_DCB
506 MLX4_EN_WOL_MAGIC
= (1ULL << 61),
507 MLX4_EN_WOL_ENABLED
= (1ULL << 62),
510 #define MLX4_EN_WOL_DO_MODIFY (1ULL << 63)
512 void mlx4_en_destroy_netdev(struct net_device
*dev
);
513 int mlx4_en_init_netdev(struct mlx4_en_dev
*mdev
, int port
,
514 struct mlx4_en_port_profile
*prof
);
516 int mlx4_en_start_port(struct net_device
*dev
);
517 void mlx4_en_stop_port(struct net_device
*dev
);
519 void mlx4_en_free_resources(struct mlx4_en_priv
*priv
);
520 int mlx4_en_alloc_resources(struct mlx4_en_priv
*priv
);
522 int mlx4_en_create_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
,
523 int entries
, int ring
, enum cq_type mode
);
524 void mlx4_en_destroy_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
525 int mlx4_en_activate_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
,
527 void mlx4_en_deactivate_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
528 int mlx4_en_set_cq_moder(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
529 int mlx4_en_arm_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
531 void mlx4_en_poll_tx_cq(unsigned long data
);
532 void mlx4_en_tx_irq(struct mlx4_cq
*mcq
);
533 u16
mlx4_en_select_queue(struct net_device
*dev
, struct sk_buff
*skb
);
534 netdev_tx_t
mlx4_en_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
536 int mlx4_en_create_tx_ring(struct mlx4_en_priv
*priv
, struct mlx4_en_tx_ring
*ring
,
537 int qpn
, u32 size
, u16 stride
);
538 void mlx4_en_destroy_tx_ring(struct mlx4_en_priv
*priv
, struct mlx4_en_tx_ring
*ring
);
539 int mlx4_en_activate_tx_ring(struct mlx4_en_priv
*priv
,
540 struct mlx4_en_tx_ring
*ring
,
541 int cq
, int user_prio
);
542 void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv
*priv
,
543 struct mlx4_en_tx_ring
*ring
);
545 int mlx4_en_create_rx_ring(struct mlx4_en_priv
*priv
,
546 struct mlx4_en_rx_ring
*ring
,
547 u32 size
, u16 stride
);
548 void mlx4_en_destroy_rx_ring(struct mlx4_en_priv
*priv
,
549 struct mlx4_en_rx_ring
*ring
,
550 u32 size
, u16 stride
);
551 int mlx4_en_activate_rx_rings(struct mlx4_en_priv
*priv
);
552 void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv
*priv
,
553 struct mlx4_en_rx_ring
*ring
);
554 int mlx4_en_process_rx_cq(struct net_device
*dev
,
555 struct mlx4_en_cq
*cq
,
557 int mlx4_en_poll_rx_cq(struct napi_struct
*napi
, int budget
);
558 void mlx4_en_fill_qp_context(struct mlx4_en_priv
*priv
, int size
, int stride
,
559 int is_tx
, int rss
, int qpn
, int cqn
, int user_prio
,
560 struct mlx4_qp_context
*context
);
561 void mlx4_en_sqp_event(struct mlx4_qp
*qp
, enum mlx4_event event
);
562 int mlx4_en_map_buffer(struct mlx4_buf
*buf
);
563 void mlx4_en_unmap_buffer(struct mlx4_buf
*buf
);
565 void mlx4_en_calc_rx_buf(struct net_device
*dev
);
566 int mlx4_en_config_rss_steer(struct mlx4_en_priv
*priv
);
567 void mlx4_en_release_rss_steer(struct mlx4_en_priv
*priv
);
568 int mlx4_en_free_tx_buf(struct net_device
*dev
, struct mlx4_en_tx_ring
*ring
);
569 void mlx4_en_rx_irq(struct mlx4_cq
*mcq
);
571 int mlx4_SET_MCAST_FLTR(struct mlx4_dev
*dev
, u8 port
, u64 mac
, u64 clear
, u8 mode
);
572 int mlx4_SET_VLAN_FLTR(struct mlx4_dev
*dev
, struct mlx4_en_priv
*priv
);
574 int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev
*mdev
, u8 port
, u8 reset
);
575 int mlx4_en_QUERY_PORT(struct mlx4_en_dev
*mdev
, u8 port
);
577 #ifdef CONFIG_MLX4_EN_DCB
578 extern const struct dcbnl_rtnl_ops mlx4_en_dcbnl_ops
;
581 #define MLX4_EN_NUM_SELF_TEST 5
582 void mlx4_en_ex_selftest(struct net_device
*dev
, u32
*flags
, u64
*buf
);
583 u64
mlx4_en_mac_to_u64(u8
*addr
);
588 extern const struct ethtool_ops mlx4_en_ethtool_ops
;
593 * printk / logging functions
597 int en_print(const char *level
, const struct mlx4_en_priv
*priv
,
598 const char *format
, ...);
600 #define en_dbg(mlevel, priv, format, arg...) \
602 if (NETIF_MSG_##mlevel & priv->msg_enable) \
603 en_print(KERN_DEBUG, priv, format, ##arg); \
605 #define en_warn(priv, format, arg...) \
606 en_print(KERN_WARNING, priv, format, ##arg)
607 #define en_err(priv, format, arg...) \
608 en_print(KERN_ERR, priv, format, ##arg)
609 #define en_info(priv, format, arg...) \
610 en_print(KERN_INFO, priv, format, ## arg)
612 #define mlx4_err(mdev, format, arg...) \
613 pr_err("%s %s: " format, DRV_NAME, \
614 dev_name(&mdev->pdev->dev), ##arg)
615 #define mlx4_info(mdev, format, arg...) \
616 pr_info("%s %s: " format, DRV_NAME, \
617 dev_name(&mdev->pdev->dev), ##arg)
618 #define mlx4_warn(mdev, format, arg...) \
619 pr_warning("%s %s: " format, DRV_NAME, \
620 dev_name(&mdev->pdev->dev), ##arg)