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/compiler.h>
38 #include <linux/list.h>
39 #include <linux/mutex.h>
40 #include <linux/netdevice.h>
41 #include <linux/inet_lro.h>
43 #include <linux/mlx4/device.h>
44 #include <linux/mlx4/qp.h>
45 #include <linux/mlx4/cq.h>
46 #include <linux/mlx4/srq.h>
47 #include <linux/mlx4/doorbell.h>
51 #define DRV_NAME "mlx4_en"
52 #define DRV_VERSION "1.4.0"
53 #define DRV_RELDATE "Sep 2008"
56 #define MLX4_EN_MSG_LEVEL (NETIF_MSG_LINK | NETIF_MSG_IFDOWN)
58 #define mlx4_dbg(mlevel, priv, format, arg...) \
59 if (NETIF_MSG_##mlevel & priv->msg_enable) \
60 printk(KERN_DEBUG "%s %s: " format , DRV_NAME ,\
61 (dev_name(&priv->mdev->pdev->dev)) , ## arg)
63 #define mlx4_err(mdev, format, arg...) \
64 printk(KERN_ERR "%s %s: " format , DRV_NAME ,\
65 (dev_name(&mdev->pdev->dev)) , ## arg)
66 #define mlx4_info(mdev, format, arg...) \
67 printk(KERN_INFO "%s %s: " format , DRV_NAME ,\
68 (dev_name(&mdev->pdev->dev)) , ## arg)
69 #define mlx4_warn(mdev, format, arg...) \
70 printk(KERN_WARNING "%s %s: " format , DRV_NAME ,\
71 (dev_name(&mdev->pdev->dev)) , ## arg)
78 #define MLX4_EN_PAGE_SHIFT 12
79 #define MLX4_EN_PAGE_SIZE (1 << MLX4_EN_PAGE_SHIFT)
80 #define MAX_TX_RINGS 16
81 #define MAX_RX_RINGS 16
82 #define MAX_RSS_MAP_SIZE 64
85 #define HEADROOM (2048 / TXBB_SIZE + 1)
86 #define MAX_LSO_HDR_SIZE 92
87 #define STAMP_STRIDE 64
88 #define STAMP_DWORDS (STAMP_STRIDE / 4)
89 #define STAMP_SHIFT 31
90 #define STAMP_VAL 0x7fffffff
91 #define STATS_DELAY (HZ / 4)
93 /* Typical TSO descriptor with 16 gather entries is 352 bytes... */
94 #define MAX_DESC_SIZE 512
95 #define MAX_DESC_TXBBS (MAX_DESC_SIZE / TXBB_SIZE)
98 * OS related constants and tunables
101 #define MLX4_EN_WATCHDOG_TIMEOUT (15 * HZ)
103 #define MLX4_EN_ALLOC_ORDER 2
104 #define MLX4_EN_ALLOC_SIZE (PAGE_SIZE << MLX4_EN_ALLOC_ORDER)
106 #define MLX4_EN_MAX_LRO_DESCRIPTORS 32
108 /* Receive fragment sizes; we use at most 4 fragments (for 9600 byte MTU
109 * and 4K allocations) */
111 FRAG_SZ0
= 512 - NET_IP_ALIGN
,
114 FRAG_SZ3
= MLX4_EN_ALLOC_SIZE
116 #define MLX4_EN_MAX_RX_FRAGS 4
118 /* Minimum ring size for our page-allocation sceme to work */
119 #define MLX4_EN_MIN_RX_SIZE (MLX4_EN_ALLOC_SIZE / SMP_CACHE_BYTES)
120 #define MLX4_EN_MIN_TX_SIZE (4096 / TXBB_SIZE)
122 #define MLX4_EN_TX_RING_NUM 9
123 #define MLX4_EN_DEF_TX_RING_SIZE 1024
124 #define MLX4_EN_DEF_RX_RING_SIZE 1024
126 /* Target number of bytes to coalesce with interrupt moderation */
127 #define MLX4_EN_RX_COAL_TARGET 0x20000
128 #define MLX4_EN_RX_COAL_TIME 0x10
130 #define MLX4_EN_TX_COAL_PKTS 5
131 #define MLX4_EN_TX_COAL_TIME 0x80
133 #define MLX4_EN_RX_RATE_LOW 400000
134 #define MLX4_EN_RX_COAL_TIME_LOW 0
135 #define MLX4_EN_RX_RATE_HIGH 450000
136 #define MLX4_EN_RX_COAL_TIME_HIGH 128
137 #define MLX4_EN_RX_SIZE_THRESH 1024
138 #define MLX4_EN_RX_RATE_THRESH (1000000 / MLX4_EN_RX_COAL_TIME_HIGH)
139 #define MLX4_EN_SAMPLE_INTERVAL 0
141 #define MLX4_EN_AUTO_CONF 0xffff
143 #define MLX4_EN_DEF_RX_PAUSE 1
144 #define MLX4_EN_DEF_TX_PAUSE 1
146 /* Interval between sucessive polls in the Tx routine when polling is used
147 instead of interrupts (in per-core Tx rings) - should be power of 2 */
148 #define MLX4_EN_TX_POLL_MODER 16
149 #define MLX4_EN_TX_POLL_TIMEOUT (HZ / 4)
151 #define ETH_LLC_SNAP_SIZE 8
153 #define SMALL_PACKET_SIZE (256 - NET_IP_ALIGN)
154 #define HEADER_COPY_SIZE (128 - NET_IP_ALIGN)
156 #define MLX4_EN_MIN_MTU 46
157 #define ETH_BCAST 0xffffffffffffULL
159 #ifdef MLX4_EN_PERF_STAT
160 /* Number of samples to 'average' */
162 #define AVG_FACTOR 1024
163 #define NUM_PERF_STATS NUM_PERF_COUNTERS
165 #define INC_PERF_COUNTER(cnt) (++(cnt))
166 #define ADD_PERF_COUNTER(cnt, add) ((cnt) += (add))
167 #define AVG_PERF_COUNTER(cnt, sample) \
168 ((cnt) = ((cnt) * (AVG_SIZE - 1) + (sample) * AVG_FACTOR) / AVG_SIZE)
169 #define GET_PERF_COUNTER(cnt) (cnt)
170 #define GET_AVG_PERF_COUNTER(cnt) ((cnt) / AVG_FACTOR)
174 #define NUM_PERF_STATS 0
175 #define INC_PERF_COUNTER(cnt) do {} while (0)
176 #define ADD_PERF_COUNTER(cnt, add) do {} while (0)
177 #define AVG_PERF_COUNTER(cnt, sample) do {} while (0)
178 #define GET_PERF_COUNTER(cnt) (0)
179 #define GET_AVG_PERF_COUNTER(cnt) (0)
180 #endif /* MLX4_EN_PERF_STAT */
195 #define ROUNDUP_LOG2(x) ilog2(roundup_pow_of_two(x))
196 #define XNOR(x, y) (!(x) == !(y))
197 #define ILLEGAL_MAC(addr) (addr == 0xffffffffffffULL || addr == 0x0)
200 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 struct mlx4_en_rx_alloc
{
230 struct mlx4_en_tx_ring
{
231 struct mlx4_hwq_resources wqres
;
232 u32 size
; /* number of TXBBs */
235 u16 cqn
; /* index of port CQ associated with this ring */
243 struct mlx4_en_tx_info
*tx_info
;
247 struct mlx4_qp_context context
;
249 enum mlx4_qp_state qp_state
;
250 struct mlx4_srq dummy
;
252 unsigned long packets
;
253 spinlock_t comp_lock
;
256 struct mlx4_en_rx_desc
{
257 struct mlx4_wqe_srq_next_seg next
;
258 /* actual number of entries depends on rx ring stride */
259 struct mlx4_wqe_data_seg data
[0];
262 struct mlx4_en_rx_ring
{
264 struct mlx4_hwq_resources wqres
;
265 struct mlx4_en_rx_alloc page_alloc
[MLX4_EN_MAX_RX_FRAGS
];
266 struct net_lro_mgr lro
;
267 u32 size
; /* number of Rx descs*/
272 u16 cqn
; /* index of port CQ associated with this ring */
281 unsigned long packets
;
285 static inline int mlx4_en_can_lro(__be16 status
)
287 return (status
& cpu_to_be16(MLX4_CQE_STATUS_IPV4
|
288 MLX4_CQE_STATUS_IPV4F
|
289 MLX4_CQE_STATUS_IPV6
|
290 MLX4_CQE_STATUS_IPV4OPT
|
291 MLX4_CQE_STATUS_TCP
|
292 MLX4_CQE_STATUS_UDP
|
293 MLX4_CQE_STATUS_IPOK
)) ==
294 cpu_to_be16(MLX4_CQE_STATUS_IPV4
|
295 MLX4_CQE_STATUS_IPOK
|
296 MLX4_CQE_STATUS_TCP
);
301 struct mlx4_hwq_resources wqres
;
304 struct net_device
*dev
;
305 struct napi_struct napi
;
306 /* Per-core Tx cq processing support */
307 struct timer_list timer
;
314 struct mlx4_cqe
*buf
;
315 #define MLX4_EN_OPCODE_ERROR 0x1e
318 struct mlx4_en_port_profile
{
330 struct mlx4_en_profile
{
340 struct mlx4_en_port_profile prof
[MLX4_MAX_PORTS
+ 1];
344 struct mlx4_dev
*dev
;
345 struct pci_dev
*pdev
;
346 struct mutex state_lock
;
347 struct net_device
*pndev
[MLX4_MAX_PORTS
+ 1];
350 struct mlx4_en_profile profile
;
352 struct workqueue_struct
*workqueue
;
353 struct device
*dma_device
;
354 void __iomem
*uar_map
;
355 struct mlx4_uar priv_uar
;
362 struct mlx4_en_rss_map
{
365 u16 map
[MAX_RSS_MAP_SIZE
];
366 struct mlx4_qp qps
[MAX_RSS_MAP_SIZE
];
367 enum mlx4_qp_state state
[MAX_RSS_MAP_SIZE
];
368 struct mlx4_qp indir_qp
;
369 enum mlx4_qp_state indir_state
;
372 struct mlx4_en_rss_context
{
381 struct mlx4_en_pkt_stats
{
382 unsigned long broadcast
;
383 unsigned long rx_prio
[8];
384 unsigned long tx_prio
[8];
385 #define NUM_PKT_STATS 17
388 struct mlx4_en_port_stats
{
389 unsigned long lro_aggregated
;
390 unsigned long lro_flushed
;
391 unsigned long lro_no_desc
;
392 unsigned long tso_packets
;
393 unsigned long queue_stopped
;
394 unsigned long wake_queue
;
395 unsigned long tx_timeout
;
396 unsigned long rx_alloc_failed
;
397 unsigned long rx_chksum_good
;
398 unsigned long rx_chksum_none
;
399 unsigned long tx_chksum_offload
;
400 #define NUM_PORT_STATS 11
403 struct mlx4_en_perf_stats
{
410 #define NUM_PERF_COUNTERS 6
413 struct mlx4_en_frag_info
{
415 u16 frag_prefix_size
;
422 struct mlx4_en_priv
{
423 struct mlx4_en_dev
*mdev
;
424 struct mlx4_en_port_profile
*prof
;
425 struct net_device
*dev
;
426 struct vlan_group
*vlgrp
;
427 struct net_device_stats stats
;
428 struct net_device_stats ret_stats
;
429 spinlock_t stats_lock
;
431 unsigned long last_moder_packets
;
432 unsigned long last_moder_tx_packets
;
433 unsigned long last_moder_bytes
;
434 unsigned long last_moder_jiffies
;
445 u16 adaptive_rx_coal
;
448 struct mlx4_hwq_resources res
;
462 struct mlx4_en_rss_map rss_map
;
465 #define MLX4_EN_FLAG_PROMISC 0x1
469 struct mlx4_en_frag_info frag_info
[MLX4_EN_MAX_RX_FRAGS
];
473 struct mlx4_en_tx_ring tx_ring
[MAX_TX_RINGS
];
474 struct mlx4_en_rx_ring rx_ring
[MAX_RX_RINGS
];
475 struct mlx4_en_cq tx_cq
[MAX_TX_RINGS
];
476 struct mlx4_en_cq rx_cq
[MAX_RX_RINGS
];
477 struct work_struct mcast_task
;
478 struct work_struct mac_task
;
479 struct delayed_work refill_task
;
480 struct work_struct watchdog_task
;
481 struct work_struct linkstate_task
;
482 struct delayed_work stats_task
;
483 struct mlx4_en_perf_stats pstats
;
484 struct mlx4_en_pkt_stats pkstats
;
485 struct mlx4_en_port_stats port_stats
;
486 struct dev_mc_list
*mc_list
;
487 struct mlx4_en_stat_out_mbox hw_stats
;
491 void mlx4_en_destroy_netdev(struct net_device
*dev
);
492 int mlx4_en_init_netdev(struct mlx4_en_dev
*mdev
, int port
,
493 struct mlx4_en_port_profile
*prof
);
495 int mlx4_en_get_profile(struct mlx4_en_dev
*mdev
);
497 int mlx4_en_create_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
,
498 int entries
, int ring
, enum cq_type mode
);
499 void mlx4_en_destroy_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
500 int mlx4_en_activate_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
501 void mlx4_en_deactivate_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
502 int mlx4_en_set_cq_moder(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
503 int mlx4_en_arm_cq(struct mlx4_en_priv
*priv
, struct mlx4_en_cq
*cq
);
505 void mlx4_en_poll_tx_cq(unsigned long data
);
506 void mlx4_en_tx_irq(struct mlx4_cq
*mcq
);
507 int mlx4_en_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
509 int mlx4_en_create_tx_ring(struct mlx4_en_priv
*priv
, struct mlx4_en_tx_ring
*ring
,
510 u32 size
, u16 stride
);
511 void mlx4_en_destroy_tx_ring(struct mlx4_en_priv
*priv
, struct mlx4_en_tx_ring
*ring
);
512 int mlx4_en_activate_tx_ring(struct mlx4_en_priv
*priv
,
513 struct mlx4_en_tx_ring
*ring
,
515 void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv
*priv
,
516 struct mlx4_en_tx_ring
*ring
);
518 int mlx4_en_create_rx_ring(struct mlx4_en_priv
*priv
,
519 struct mlx4_en_rx_ring
*ring
,
520 u32 size
, u16 stride
);
521 void mlx4_en_destroy_rx_ring(struct mlx4_en_priv
*priv
,
522 struct mlx4_en_rx_ring
*ring
);
523 int mlx4_en_activate_rx_rings(struct mlx4_en_priv
*priv
);
524 void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv
*priv
,
525 struct mlx4_en_rx_ring
*ring
);
526 int mlx4_en_process_rx_cq(struct net_device
*dev
,
527 struct mlx4_en_cq
*cq
,
529 int mlx4_en_poll_rx_cq(struct napi_struct
*napi
, int budget
);
530 void mlx4_en_fill_qp_context(struct mlx4_en_priv
*priv
, int size
, int stride
,
531 int is_tx
, int rss
, int qpn
, int cqn
, int srqn
,
532 struct mlx4_qp_context
*context
);
533 int mlx4_en_map_buffer(struct mlx4_buf
*buf
);
534 void mlx4_en_unmap_buffer(struct mlx4_buf
*buf
);
536 void mlx4_en_calc_rx_buf(struct net_device
*dev
);
537 void mlx4_en_set_default_rss_map(struct mlx4_en_priv
*priv
,
538 struct mlx4_en_rss_map
*rss_map
,
539 int num_entries
, int num_rings
);
540 void mlx4_en_set_prio_map(struct mlx4_en_priv
*priv
, u16
*prio_map
, u32 ring_num
);
541 int mlx4_en_config_rss_steer(struct mlx4_en_priv
*priv
);
542 void mlx4_en_release_rss_steer(struct mlx4_en_priv
*priv
);
543 int mlx4_en_free_tx_buf(struct net_device
*dev
, struct mlx4_en_tx_ring
*ring
);
544 void mlx4_en_rx_refill(struct work_struct
*work
);
545 void mlx4_en_rx_irq(struct mlx4_cq
*mcq
);
547 int mlx4_SET_MCAST_FLTR(struct mlx4_dev
*dev
, u8 port
, u64 mac
, u64 clear
, u8 mode
);
548 int mlx4_SET_VLAN_FLTR(struct mlx4_dev
*dev
, u8 port
, struct vlan_group
*grp
);
549 int mlx4_SET_PORT_general(struct mlx4_dev
*dev
, u8 port
, int mtu
,
550 u8 pptx
, u8 pfctx
, u8 pprx
, u8 pfcrx
);
551 int mlx4_SET_PORT_qpn_calc(struct mlx4_dev
*dev
, u8 port
, u32 base_qpn
,
554 int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev
*mdev
, u8 port
, u8 reset
);
559 extern const struct ethtool_ops mlx4_en_ethtool_ops
;