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 "1.4.1.1"
53 #define DRV_RELDATE "June 2009"
56 #define MLX4_EN_MSG_LEVEL (NETIF_MSG_LINK | NETIF_MSG_IFDOWN)
58 #define en_print(level, priv, format, arg...) \
60 if ((priv)->registered) \
61 printk(level "%s: %s: " format, DRV_NAME, \
62 (priv->dev)->name, ## arg); \
64 printk(level "%s: %s: Port %d: " format, \
65 DRV_NAME, dev_name(&priv->mdev->pdev->dev), \
66 (priv)->port, ## arg); \
69 #define en_dbg(mlevel, priv, format, arg...) \
71 if (NETIF_MSG_##mlevel & priv->msg_enable) \
72 en_print(KERN_DEBUG, priv, format, ## arg) \
74 #define en_warn(priv, format, arg...) \
75 en_print(KERN_WARNING, priv, format, ## arg)
76 #define en_err(priv, format, arg...) \
77 en_print(KERN_ERR, priv, format, ## arg)
79 #define mlx4_err(mdev, format, arg...) \
80 printk(KERN_ERR "%s %s: " format , DRV_NAME ,\
81 dev_name(&mdev->pdev->dev) , ## arg)
82 #define mlx4_info(mdev, format, arg...) \
83 printk(KERN_INFO "%s %s: " format , DRV_NAME ,\
84 dev_name(&mdev->pdev->dev) , ## arg)
85 #define mlx4_warn(mdev, format, arg...) \
86 printk(KERN_WARNING "%s %s: " format , DRV_NAME ,\
87 dev_name(&mdev->pdev->dev) , ## arg)
94 #define MLX4_EN_PAGE_SHIFT 12
95 #define MLX4_EN_PAGE_SIZE (1 << MLX4_EN_PAGE_SHIFT)
96 #define MAX_TX_RINGS 16
97 #define MAX_RX_RINGS 16
98 #define MAX_RSS_MAP_SIZE 64
101 #define HEADROOM (2048 / TXBB_SIZE + 1)
102 #define STAMP_STRIDE 64
103 #define STAMP_DWORDS (STAMP_STRIDE / 4)
104 #define STAMP_SHIFT 31
105 #define STAMP_VAL 0x7fffffff
106 #define STATS_DELAY (HZ / 4)
108 /* Typical TSO descriptor with 16 gather entries is 352 bytes... */
109 #define MAX_DESC_SIZE 512
110 #define MAX_DESC_TXBBS (MAX_DESC_SIZE / TXBB_SIZE)
113 * OS related constants and tunables
116 #define MLX4_EN_WATCHDOG_TIMEOUT (15 * HZ)
118 #define MLX4_EN_ALLOC_ORDER 2
119 #define MLX4_EN_ALLOC_SIZE (PAGE_SIZE << MLX4_EN_ALLOC_ORDER)
121 #define MLX4_EN_MAX_LRO_DESCRIPTORS 32
123 /* Receive fragment sizes; we use at most 4 fragments (for 9600 byte MTU
124 * and 4K allocations) */
126 FRAG_SZ0 = 512 - NET_IP_ALIGN,
129 FRAG_SZ3 = MLX4_EN_ALLOC_SIZE
131 #define MLX4_EN_MAX_RX_FRAGS 4
133 /* Maximum ring sizes */
134 #define MLX4_EN_MAX_TX_SIZE 8192
135 #define MLX4_EN_MAX_RX_SIZE 8192
137 /* Minimum ring size for our page-allocation sceme to work */
138 #define MLX4_EN_MIN_RX_SIZE (MLX4_EN_ALLOC_SIZE / SMP_CACHE_BYTES)
139 #define MLX4_EN_MIN_TX_SIZE (4096 / TXBB_SIZE)
141 #define MLX4_EN_SMALL_PKT_SIZE 64
142 #define MLX4_EN_NUM_TX_RINGS 8
143 #define MLX4_EN_NUM_PPP_RINGS 8
144 #define MLX4_EN_DEF_TX_RING_SIZE 512
145 #define MLX4_EN_DEF_RX_RING_SIZE 1024
147 /* Target number of packets to coalesce with interrupt moderation */
148 #define MLX4_EN_RX_COAL_TARGET 44
149 #define MLX4_EN_RX_COAL_TIME 0x10
151 #define MLX4_EN_TX_COAL_PKTS 5
152 #define MLX4_EN_TX_COAL_TIME 0x80
154 #define MLX4_EN_RX_RATE_LOW 400000
155 #define MLX4_EN_RX_COAL_TIME_LOW 0
156 #define MLX4_EN_RX_RATE_HIGH 450000
157 #define MLX4_EN_RX_COAL_TIME_HIGH 128
158 #define MLX4_EN_RX_SIZE_THRESH 1024
159 #define MLX4_EN_RX_RATE_THRESH (1000000 / MLX4_EN_RX_COAL_TIME_HIGH)
160 #define MLX4_EN_SAMPLE_INTERVAL 0
162 #define MLX4_EN_AUTO_CONF 0xffff
164 #define MLX4_EN_DEF_RX_PAUSE 1
165 #define MLX4_EN_DEF_TX_PAUSE 1
167 /* Interval between sucessive polls in the Tx routine when polling is used
168 instead of interrupts (in per-core Tx rings) - should be power of 2 */
169 #define MLX4_EN_TX_POLL_MODER 16
170 #define MLX4_EN_TX_POLL_TIMEOUT (HZ / 4)
172 #define ETH_LLC_SNAP_SIZE 8
174 #define SMALL_PACKET_SIZE (256 - NET_IP_ALIGN)
175 #define HEADER_COPY_SIZE (128 - NET_IP_ALIGN)
177 #define MLX4_EN_MIN_MTU 46
178 #define ETH_BCAST 0xffffffffffffULL
180 #ifdef MLX4_EN_PERF_STAT
181 /* Number of samples to 'average' */
183 #define AVG_FACTOR 1024
184 #define NUM_PERF_STATS NUM_PERF_COUNTERS
186 #define INC_PERF_COUNTER(cnt) (++(cnt))
187 #define ADD_PERF_COUNTER(cnt, add) ((cnt) += (add))
188 #define AVG_PERF_COUNTER(cnt, sample) \
189 ((cnt) = ((cnt) * (AVG_SIZE - 1) + (sample) * AVG_FACTOR) / AVG_SIZE)
190 #define GET_PERF_COUNTER(cnt) (cnt)
191 #define GET_AVG_PERF_COUNTER(cnt) ((cnt) / AVG_FACTOR)
195 #define NUM_PERF_STATS 0
196 #define INC_PERF_COUNTER(cnt) do {} while (0)
197 #define ADD_PERF_COUNTER(cnt, add) do {} while (0)
198 #define AVG_PERF_COUNTER(cnt, sample) do {} while (0)
199 #define GET_PERF_COUNTER(cnt) (0)
200 #define GET_AVG_PERF_COUNTER(cnt) (0)
201 #endif /* MLX4_EN_PERF_STAT */
216 #define ROUNDUP_LOG2(x) ilog2(roundup_pow_of_two(x))
217 #define XNOR(x, y) (!(x) == !(y))
218 #define ILLEGAL_MAC(addr) (addr == 0xffffffffffffULL || addr == 0x0)
221 struct mlx4_en_tx_info {
230 #define MLX4_EN_BIT_DESC_OWN 0x80000000
231 #define CTRL_SIZE sizeof(struct mlx4_wqe_ctrl_seg)
232 #define MLX4_EN_MEMTYPE_PAD 0x100
233 #define DS_SIZE sizeof(struct mlx4_wqe_data_seg)
236 struct mlx4_en_tx_desc {
237 struct mlx4_wqe_ctrl_seg ctrl;
239 struct mlx4_wqe_data_seg data; /* at least one data segment */
240 struct mlx4_wqe_lso_seg lso;
241 struct mlx4_wqe_inline_seg inl;
245 #define MLX4_EN_USE_SRQ 0x01000000
247 struct mlx4_en_rx_alloc {
252 struct mlx4_en_tx_ring {
253 struct mlx4_hwq_resources wqres;
254 u32 size ; /* number of TXBBs */
257 u16 cqn; /* index of port CQ associated with this ring */
265 struct mlx4_en_tx_info *tx_info;
269 struct mlx4_qp_context context;
271 enum mlx4_qp_state qp_state;
272 struct mlx4_srq dummy;
274 unsigned long packets;
275 spinlock_t comp_lock;
278 struct mlx4_en_rx_desc {
279 struct mlx4_wqe_srq_next_seg next;
280 /* actual number of entries depends on rx ring stride */
281 struct mlx4_wqe_data_seg data[0];
284 struct mlx4_en_rx_ring {
286 struct mlx4_hwq_resources wqres;
287 struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
288 struct net_lro_mgr lro;
289 u32 size ; /* number of Rx descs*/
294 u16 cqn; /* index of port CQ associated with this ring */
301 unsigned long packets;
305 static inline int mlx4_en_can_lro(__be16 status)
307 return (status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
308 MLX4_CQE_STATUS_IPV4F |
309 MLX4_CQE_STATUS_IPV6 |
310 MLX4_CQE_STATUS_IPV4OPT |
311 MLX4_CQE_STATUS_TCP |
312 MLX4_CQE_STATUS_UDP |
313 MLX4_CQE_STATUS_IPOK)) ==
314 cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
315 MLX4_CQE_STATUS_IPOK |
316 MLX4_CQE_STATUS_TCP);
321 struct mlx4_hwq_resources wqres;
324 struct net_device *dev;
325 struct napi_struct napi;
326 /* Per-core Tx cq processing support */
327 struct timer_list timer;
334 struct mlx4_cqe *buf;
335 #define MLX4_EN_OPCODE_ERROR 0x1e
338 struct mlx4_en_port_profile {
350 struct mlx4_en_profile {
357 struct mlx4_en_port_profile prof[MLX4_MAX_PORTS + 1];
361 struct mlx4_dev *dev;
362 struct pci_dev *pdev;
363 struct mutex state_lock;
364 struct net_device *pndev[MLX4_MAX_PORTS + 1];
367 struct mlx4_en_profile profile;
369 struct workqueue_struct *workqueue;
370 struct device *dma_device;
371 void __iomem *uar_map;
372 struct mlx4_uar priv_uar;
379 struct mlx4_en_rss_map {
382 u16 map[MAX_RSS_MAP_SIZE];
383 struct mlx4_qp qps[MAX_RSS_MAP_SIZE];
384 enum mlx4_qp_state state[MAX_RSS_MAP_SIZE];
385 struct mlx4_qp indir_qp;
386 enum mlx4_qp_state indir_state;
389 struct mlx4_en_rss_context {
398 struct mlx4_en_pkt_stats {
399 unsigned long broadcast;
400 unsigned long rx_prio[8];
401 unsigned long tx_prio[8];
402 #define NUM_PKT_STATS 17
405 struct mlx4_en_port_stats {
406 unsigned long lro_aggregated;
407 unsigned long lro_flushed;
408 unsigned long lro_no_desc;
409 unsigned long tso_packets;
410 unsigned long queue_stopped;
411 unsigned long wake_queue;
412 unsigned long tx_timeout;
413 unsigned long rx_alloc_failed;
414 unsigned long rx_chksum_good;
415 unsigned long rx_chksum_none;
416 unsigned long tx_chksum_offload;
417 #define NUM_PORT_STATS 11
420 struct mlx4_en_perf_stats {
427 #define NUM_PERF_COUNTERS 6
430 struct mlx4_en_frag_info {
432 u16 frag_prefix_size;
439 struct mlx4_en_priv {
440 struct mlx4_en_dev *mdev;
441 struct mlx4_en_port_profile *prof;
442 struct net_device *dev;
443 struct vlan_group *vlgrp;
444 struct net_device_stats stats;
445 struct net_device_stats ret_stats;
446 spinlock_t stats_lock;
448 unsigned long last_moder_packets;
449 unsigned long last_moder_tx_packets;
450 unsigned long last_moder_bytes;
451 unsigned long last_moder_jiffies;
462 u16 adaptive_rx_coal;
465 struct mlx4_hwq_resources res;
479 struct mlx4_en_rss_map rss_map;
481 #define MLX4_EN_FLAG_PROMISC 0x1
485 struct mlx4_en_frag_info frag_info[MLX4_EN_MAX_RX_FRAGS];
489 struct mlx4_en_tx_ring tx_ring[MAX_TX_RINGS];
490 struct mlx4_en_rx_ring rx_ring[MAX_RX_RINGS];
491 struct mlx4_en_cq tx_cq[MAX_TX_RINGS];
492 struct mlx4_en_cq rx_cq[MAX_RX_RINGS];
493 struct work_struct mcast_task;
494 struct work_struct mac_task;
495 struct work_struct watchdog_task;
496 struct work_struct linkstate_task;
497 struct delayed_work stats_task;
498 struct mlx4_en_perf_stats pstats;
499 struct mlx4_en_pkt_stats pkstats;
500 struct mlx4_en_port_stats port_stats;
501 struct dev_mc_list *mc_list;
502 struct mlx4_en_stat_out_mbox hw_stats;
506 void mlx4_en_destroy_netdev(struct net_device *dev);
507 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
508 struct mlx4_en_port_profile *prof);
510 int mlx4_en_start_port(struct net_device *dev);
511 void mlx4_en_stop_port(struct net_device *dev);
513 void mlx4_en_free_resources(struct mlx4_en_priv *priv);
514 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv);
516 int mlx4_en_create_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
517 int entries, int ring, enum cq_type mode);
518 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
519 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
520 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
521 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
522 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq);
524 void mlx4_en_poll_tx_cq(unsigned long data);
525 void mlx4_en_tx_irq(struct mlx4_cq *mcq);
526 u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb);
527 int mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev);
529 int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv, struct mlx4_en_tx_ring *ring,
530 u32 size, u16 stride);
531 void mlx4_en_destroy_tx_ring(struct mlx4_en_priv *priv, struct mlx4_en_tx_ring *ring);
532 int mlx4_en_activate_tx_ring(struct mlx4_en_priv *priv,
533 struct mlx4_en_tx_ring *ring,
535 void mlx4_en_deactivate_tx_ring(struct mlx4_en_priv *priv,
536 struct mlx4_en_tx_ring *ring);
538 int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
539 struct mlx4_en_rx_ring *ring,
540 u32 size, u16 stride);
541 void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
542 struct mlx4_en_rx_ring *ring);
543 int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv);
544 void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
545 struct mlx4_en_rx_ring *ring);
546 int mlx4_en_process_rx_cq(struct net_device *dev,
547 struct mlx4_en_cq *cq,
549 int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget);
550 void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
551 int is_tx, int rss, int qpn, int cqn, int srqn,
552 struct mlx4_qp_context *context);
553 void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event);
554 int mlx4_en_map_buffer(struct mlx4_buf *buf);
555 void mlx4_en_unmap_buffer(struct mlx4_buf *buf);
557 void mlx4_en_calc_rx_buf(struct net_device *dev);
558 void mlx4_en_set_default_rss_map(struct mlx4_en_priv *priv,
559 struct mlx4_en_rss_map *rss_map,
560 int num_entries, int num_rings);
561 int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv);
562 void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv);
563 int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring);
564 void mlx4_en_rx_irq(struct mlx4_cq *mcq);
566 int mlx4_SET_MCAST_FLTR(struct mlx4_dev *dev, u8 port, u64 mac, u64 clear, u8 mode);
567 int mlx4_SET_VLAN_FLTR(struct mlx4_dev *dev, u8 port, struct vlan_group *grp);
568 int mlx4_SET_PORT_general(struct mlx4_dev *dev, u8 port, int mtu,
569 u8 pptx, u8 pfctx, u8 pprx, u8 pfcrx);
570 int mlx4_SET_PORT_qpn_calc(struct mlx4_dev *dev, u8 port, u32 base_qpn,
573 int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset);
578 extern const struct ethtool_ops mlx4_en_ethtool_ops;