Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
nes.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2006 - 2011 Intel Corporation. All rights reserved.
3  * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses. You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the
9  * OpenIB.org BSD license below:
10  *
11  * Redistribution and use in source and binary forms, with or
12  * without modification, are permitted provided that the following
13  * conditions are met:
14  *
15  * - Redistributions of source code must retain the above
16  * copyright notice, this list of conditions and the following
17  * disclaimer.
18  *
19  * - Redistributions in binary form must reproduce the above
20  * copyright notice, this list of conditions and the following
21  * disclaimer in the documentation and/or other materials
22  * provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33 
34 #ifndef __NES_H
35 #define __NES_H
36 
37 #include <linux/netdevice.h>
38 #include <linux/inetdevice.h>
39 #include <linux/spinlock.h>
40 #include <linux/kernel.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/workqueue.h>
45 #include <linux/slab.h>
46 #include <asm/io.h>
47 #include <linux/crc32c.h>
48 
49 #include <rdma/ib_smi.h>
50 #include <rdma/ib_verbs.h>
51 #include <rdma/ib_pack.h>
52 #include <rdma/rdma_cm.h>
53 #include <rdma/iw_cm.h>
54 
55 #define NES_SEND_FIRST_WRITE
56 
57 #define QUEUE_DISCONNECTS
58 
59 #define DRV_NAME "iw_nes"
60 #define DRV_VERSION "1.5.0.1"
61 #define PFX DRV_NAME ": "
62 
63 /*
64  * NetEffect PCI vendor id and NE010 PCI device id.
65  */
66 #ifndef PCI_VENDOR_ID_NETEFFECT /* not in pci.ids yet */
67 #define PCI_VENDOR_ID_NETEFFECT 0x1678
68 #define PCI_DEVICE_ID_NETEFFECT_NE020 0x0100
69 #define PCI_DEVICE_ID_NETEFFECT_NE020_KR 0x0110
70 #endif
71 
72 #define NE020_REV 4
73 #define NE020_REV1 5
74 
75 #define BAR_0 0
76 #define BAR_1 2
77 
78 #define RX_BUF_SIZE (1536 + 8)
79 #define NES_REG0_SIZE (4 * 1024)
80 #define NES_TX_TIMEOUT (6*HZ)
81 #define NES_FIRST_QPN 64
82 #define NES_SW_CONTEXT_ALIGN 1024
83 
84 #define NES_NIC_MAX_NICS 16
85 #define NES_MAX_ARP_TABLE_SIZE 4096
86 
87 #define NES_NIC_CEQ_SIZE 8
88 /* NICs will be on a separate CQ */
89 #define NES_CCEQ_SIZE ((nesadapter->max_cq / nesadapter->port_count) - 32)
90 
91 #define NES_MAX_PORT_COUNT 4
92 
93 #define MAX_DPC_ITERATIONS 128
94 
95 #define NES_DRV_OPT_ENABLE_MPA_VER_0 0x00000001
96 #define NES_DRV_OPT_DISABLE_MPA_CRC 0x00000002
97 #define NES_DRV_OPT_DISABLE_FIRST_WRITE 0x00000004
98 #define NES_DRV_OPT_DISABLE_INTF 0x00000008
99 #define NES_DRV_OPT_ENABLE_MSI 0x00000010
100 #define NES_DRV_OPT_DUAL_LOGICAL_PORT 0x00000020
101 #define NES_DRV_OPT_SUPRESS_OPTION_BC 0x00000040
102 #define NES_DRV_OPT_NO_INLINE_DATA 0x00000080
103 #define NES_DRV_OPT_DISABLE_INT_MOD 0x00000100
104 #define NES_DRV_OPT_DISABLE_VIRT_WQ 0x00000200
105 #define NES_DRV_OPT_ENABLE_PAU 0x00000400
106 
107 #define NES_AEQ_EVENT_TIMEOUT 2500
108 #define NES_DISCONNECT_EVENT_TIMEOUT 2000
109 
110 /* debug levels */
111 /* must match userspace */
112 #define NES_DBG_HW 0x00000001
113 #define NES_DBG_INIT 0x00000002
114 #define NES_DBG_ISR 0x00000004
115 #define NES_DBG_PHY 0x00000008
116 #define NES_DBG_NETDEV 0x00000010
117 #define NES_DBG_CM 0x00000020
118 #define NES_DBG_CM1 0x00000040
119 #define NES_DBG_NIC_RX 0x00000080
120 #define NES_DBG_NIC_TX 0x00000100
121 #define NES_DBG_CQP 0x00000200
122 #define NES_DBG_MMAP 0x00000400
123 #define NES_DBG_MR 0x00000800
124 #define NES_DBG_PD 0x00001000
125 #define NES_DBG_CQ 0x00002000
126 #define NES_DBG_QP 0x00004000
127 #define NES_DBG_MOD_QP 0x00008000
128 #define NES_DBG_AEQ 0x00010000
129 #define NES_DBG_IW_RX 0x00020000
130 #define NES_DBG_IW_TX 0x00040000
131 #define NES_DBG_SHUTDOWN 0x00080000
132 #define NES_DBG_PAU 0x00100000
133 #define NES_DBG_RSVD1 0x10000000
134 #define NES_DBG_RSVD2 0x20000000
135 #define NES_DBG_RSVD3 0x40000000
136 #define NES_DBG_RSVD4 0x80000000
137 #define NES_DBG_ALL 0xffffffff
138 
139 #ifdef CONFIG_INFINIBAND_NES_DEBUG
140 #define nes_debug(level, fmt, args...) \
141 do { \
142  if (level & nes_debug_level) \
143  printk(KERN_ERR PFX "%s[%u]: " fmt, __func__, __LINE__, ##args); \
144 } while (0)
145 
146 #define assert(expr) \
147 do { \
148  if (!(expr)) { \
149  printk(KERN_ERR PFX "Assertion failed! %s, %s, %s, line %d\n", \
150  #expr, __FILE__, __func__, __LINE__); \
151  } \
152 } while (0)
153 
154 #define NES_EVENT_TIMEOUT 1200000
155 #else
156 #define nes_debug(level, fmt, args...)
157 #define assert(expr) do {} while (0)
158 
159 #define NES_EVENT_TIMEOUT 100000
160 #endif
161 
162 #include "nes_hw.h"
163 #include "nes_verbs.h"
164 #include "nes_context.h"
165 #include "nes_user.h"
166 #include "nes_cm.h"
167 #include "nes_mgt.h"
168 
169 extern int max_mtu;
170 #define max_frame_len (max_mtu+ETH_HLEN)
171 extern int interrupt_mod_interval;
172 extern int nes_if_count;
173 extern int mpa_version;
174 extern int disable_mpa_crc;
175 extern unsigned int nes_drv_opt;
176 extern unsigned int nes_debug_level;
177 extern unsigned int wqm_quanta;
178 extern struct list_head nes_adapter_list;
179 
180 extern atomic_t cm_connects;
181 extern atomic_t cm_accepts;
182 extern atomic_t cm_disconnects;
183 extern atomic_t cm_closes;
184 extern atomic_t cm_connecteds;
186 extern atomic_t cm_rejects;
187 extern atomic_t mod_qp_timouts;
188 extern atomic_t qps_created;
189 extern atomic_t qps_destroyed;
191 extern u32 mh_detected;
192 extern u32 mh_pauses_sent;
193 extern u32 cm_packets_sent;
194 extern u32 cm_packets_bounced;
195 extern u32 cm_packets_created;
196 extern u32 cm_packets_received;
197 extern u32 cm_packets_dropped;
198 extern u32 cm_packets_retrans;
201 extern u32 cm_backlog_drops;
202 extern atomic_t cm_loopbacks;
209 
210 extern u32 int_mod_timer_init;
213 extern u32 int_mod_cq_depth_32;
214 extern u32 int_mod_cq_depth_24;
215 extern u32 int_mod_cq_depth_16;
216 extern u32 int_mod_cq_depth_4;
217 extern u32 int_mod_cq_depth_1;
218 
219 struct nes_device {
221  void __iomem *regs;
223  struct pci_dev *pcidev;
228  unsigned long csr_start;
229  unsigned long doorbell_region;
230  unsigned long doorbell_start;
231  unsigned long mac_tx_errors;
232  unsigned long mac_pause_frames_sent;
234  unsigned long mac_rx_errors;
235  unsigned long mac_rx_crc_errors;
237  unsigned long mac_rx_jabber_frames;
238  unsigned long mac_rx_oversized_frames;
239  unsigned long mac_rx_short_frames;
240  unsigned long port_rx_discards;
241  unsigned long port_tx_discards;
242  unsigned int mac_index;
243  unsigned int nes_stack_start;
244 
245  /* Control Structures */
246  void *cqp_vbase;
251  struct nes_hw_cqp cqp;
252  struct nes_hw_cq ccq;
256 
264  struct list_head list;
265 
275 
278 };
279 
280 /* Receive skb private area - must fit in skb->cb area */
281 struct nes_rskb_cb {
286  struct nes_qp *nesqp;
287 };
288 
289 static inline __le32 get_crc_value(struct nes_v4_quad *nes_quad)
290 {
291  u32 crc_value;
292  crc_value = crc32c(~0, (void *)nes_quad, sizeof (struct nes_v4_quad));
293 
294  /*
295  * With commit ef19454b ("[LIB] crc32c: Keep intermediate crc
296  * state in cpu order"), behavior of crc32c changes on
297  * big-endian platforms. Our algorithm expects the previous
298  * behavior; otherwise we have RDMA connection establishment
299  * issue on big-endian.
300  */
301  return cpu_to_le32(crc_value);
302 }
303 
304 static inline void
305 set_wqe_64bit_value(__le32 *wqe_words, u32 index, u64 value)
306 {
307  wqe_words[index] = cpu_to_le32((u32) value);
308  wqe_words[index + 1] = cpu_to_le32(upper_32_bits(value));
309 }
310 
311 static inline void
312 set_wqe_32bit_value(__le32 *wqe_words, u32 index, u32 value)
313 {
314  wqe_words[index] = cpu_to_le32(value);
315 }
316 
317 static inline void
318 nes_fill_init_cqp_wqe(struct nes_hw_cqp_wqe *cqp_wqe, struct nes_device *nesdev)
319 {
329 }
330 
331 static inline void
332 nes_fill_init_qp_wqe(struct nes_hw_qp_wqe *wqe, struct nes_qp *nesqp, u32 head)
333 {
334  u32 value;
335  value = ((u32)((unsigned long) nesqp)) | head;
336  set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_HIGH_IDX,
337  (u32)(upper_32_bits((unsigned long)(nesqp))));
338  set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, value);
339 }
340 
341 /* Read from memory-mapped device */
342 static inline u32 nes_read_indexed(struct nes_device *nesdev, u32 reg_index)
343 {
344  unsigned long flags;
345  void __iomem *addr = nesdev->index_reg;
346  u32 value;
347 
348  spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
349 
350  writel(reg_index, addr);
351  value = readl((void __iomem *)addr + 4);
352 
353  spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
354  return value;
355 }
356 
357 static inline u32 nes_read32(const void __iomem *addr)
358 {
359  return readl(addr);
360 }
361 
362 static inline u16 nes_read16(const void __iomem *addr)
363 {
364  return readw(addr);
365 }
366 
367 static inline u8 nes_read8(const void __iomem *addr)
368 {
369  return readb(addr);
370 }
371 
372 /* Write to memory-mapped device */
373 static inline void nes_write_indexed(struct nes_device *nesdev, u32 reg_index, u32 val)
374 {
375  unsigned long flags;
376  void __iomem *addr = nesdev->index_reg;
377 
378  spin_lock_irqsave(&nesdev->indexed_regs_lock, flags);
379 
380  writel(reg_index, addr);
381  writel(val, (void __iomem *)addr + 4);
382 
383  spin_unlock_irqrestore(&nesdev->indexed_regs_lock, flags);
384 }
385 
386 static inline void nes_write32(void __iomem *addr, u32 val)
387 {
388  writel(val, addr);
389 }
390 
391 static inline void nes_write16(void __iomem *addr, u16 val)
392 {
393  writew(val, addr);
394 }
395 
396 static inline void nes_write8(void __iomem *addr, u8 val)
397 {
398  writeb(val, addr);
399 }
400 
410 };
411 
412 static inline int nes_alloc_resource(struct nes_adapter *nesadapter,
413  unsigned long *resource_array, u32 max_resources,
414  u32 *req_resource_num, u32 *next, enum nes_resource resource_type)
415 {
416  unsigned long flags;
417  u32 resource_num;
418 
419  spin_lock_irqsave(&nesadapter->resource_lock, flags);
420 
421  resource_num = find_next_zero_bit(resource_array, max_resources, *next);
422  if (resource_num >= max_resources) {
423  resource_num = find_first_zero_bit(resource_array, max_resources);
424  if (resource_num >= max_resources) {
425  printk(KERN_ERR PFX "%s: No available resources [type=%u].\n", __func__, resource_type);
426  spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
427  return -EMFILE;
428  }
429  }
430  set_bit(resource_num, resource_array);
431  *next = resource_num+1;
432  if (*next == max_resources) {
433  *next = 0;
434  }
435  spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
436  *req_resource_num = resource_num;
437 
438  return 0;
439 }
440 
441 static inline int nes_is_resource_allocated(struct nes_adapter *nesadapter,
442  unsigned long *resource_array, u32 resource_num)
443 {
444  unsigned long flags;
445  int bit_is_set;
446 
447  spin_lock_irqsave(&nesadapter->resource_lock, flags);
448 
449  bit_is_set = test_bit(resource_num, resource_array);
450  nes_debug(NES_DBG_HW, "resource_num %u is%s allocated.\n",
451  resource_num, (bit_is_set ? "": " not"));
452  spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
453 
454  return bit_is_set;
455 }
456 
457 static inline void nes_free_resource(struct nes_adapter *nesadapter,
458  unsigned long *resource_array, u32 resource_num)
459 {
460  unsigned long flags;
461 
462  spin_lock_irqsave(&nesadapter->resource_lock, flags);
463  clear_bit(resource_num, resource_array);
464  spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
465 }
466 
467 static inline struct nes_vnic *to_nesvnic(struct ib_device *ibdev)
468 {
469  return container_of(ibdev, struct nes_ib_device, ibdev)->nesvnic;
470 }
471 
472 static inline struct nes_pd *to_nespd(struct ib_pd *ibpd)
473 {
474  return container_of(ibpd, struct nes_pd, ibpd);
475 }
476 
477 static inline struct nes_ucontext *to_nesucontext(struct ib_ucontext *ibucontext)
478 {
479  return container_of(ibucontext, struct nes_ucontext, ibucontext);
480 }
481 
482 static inline struct nes_mr *to_nesmr(struct ib_mr *ibmr)
483 {
484  return container_of(ibmr, struct nes_mr, ibmr);
485 }
486 
487 static inline struct nes_mr *to_nesmr_from_ibfmr(struct ib_fmr *ibfmr)
488 {
489  return container_of(ibfmr, struct nes_mr, ibfmr);
490 }
491 
492 static inline struct nes_mr *to_nesmw(struct ib_mw *ibmw)
493 {
494  return container_of(ibmw, struct nes_mr, ibmw);
495 }
496 
497 static inline struct nes_fmr *to_nesfmr(struct nes_mr *nesmr)
498 {
499  return container_of(nesmr, struct nes_fmr, nesmr);
500 }
501 
502 static inline struct nes_cq *to_nescq(struct ib_cq *ibcq)
503 {
504  return container_of(ibcq, struct nes_cq, ibcq);
505 }
506 
507 static inline struct nes_qp *to_nesqp(struct ib_qp *ibqp)
508 {
509  return container_of(ibqp, struct nes_qp, ibqp);
510 }
511 
512 
513 
514 /* nes.c */
515 void nes_add_ref(struct ib_qp *);
516 void nes_rem_ref(struct ib_qp *);
517 struct ib_qp *nes_get_qp(struct ib_device *, int);
518 
519 
520 /* nes_hw.c */
521 struct nes_adapter *nes_init_adapter(struct nes_device *, u8);
523 void nes_destroy_adapter(struct nes_adapter *);
524 int nes_init_cqp(struct nes_device *);
525 int nes_init_phy(struct nes_device *);
526 int nes_init_nic_qp(struct nes_device *, struct net_device *);
527 void nes_destroy_nic_qp(struct nes_vnic *);
528 int nes_napi_isr(struct nes_device *);
529 void nes_dpc(unsigned long);
530 void nes_nic_ce_handler(struct nes_device *, struct nes_hw_nic_cq *);
531 void nes_iwarp_ce_handler(struct nes_device *, struct nes_hw_cq *);
532 int nes_destroy_cqp(struct nes_device *);
533 int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
535 
536 /* nes_nic.c */
537 struct net_device *nes_netdev_init(struct nes_device *, void __iomem *);
538 void nes_netdev_destroy(struct net_device *);
539 int nes_nic_cm_xmit(struct sk_buff *, struct net_device *);
540 
541 /* nes_cm.c */
542 void *nes_cm_create(struct net_device *);
543 int nes_cm_recv(struct sk_buff *, struct net_device *);
544 void nes_update_arp(unsigned char *, u32, u32, u16, u16);
545 void nes_manage_arp_cache(struct net_device *, unsigned char *, u32, u32);
546 void nes_sock_release(struct nes_qp *, unsigned long *);
547 void flush_wqes(struct nes_device *nesdev, struct nes_qp *, u32, u32);
548 int nes_manage_apbvt(struct nes_vnic *, u32, u32, u32);
549 int nes_cm_disconn(struct nes_qp *);
550 void nes_cm_disconn_worker(void *);
551 
552 /* nes_verbs.c */
553 int nes_hw_modify_qp(struct nes_device *, struct nes_qp *, u32, u32, u32);
554 int nes_modify_qp(struct ib_qp *, struct ib_qp_attr *, int, struct ib_udata *);
556 void nes_port_ibevent(struct nes_vnic *nesvnic);
559 
560 /* nes_util.c */
561 int nes_read_eeprom_values(struct nes_device *, struct nes_adapter *);
562 void nes_write_1G_phy_reg(struct nes_device *, u8, u8, u16);
563 void nes_read_1G_phy_reg(struct nes_device *, u8, u8, u16 *);
564 void nes_write_10G_phy_reg(struct nes_device *, u16, u8, u16, u16);
565 void nes_read_10G_phy_reg(struct nes_device *, u8, u8, u16);
567 void nes_free_cqp_request(struct nes_device *nesdev,
568  struct nes_cqp_request *cqp_request);
569 void nes_put_cqp_request(struct nes_device *nesdev,
570  struct nes_cqp_request *cqp_request);
571 void nes_post_cqp_request(struct nes_device *, struct nes_cqp_request *);
572 int nes_arp_table(struct nes_device *, u32, u8 *, u32);
573 void nes_mh_fix(unsigned long);
574 void nes_clc(unsigned long);
575 void nes_dump_mem(unsigned int, void *, int);
576 u32 nes_crc32(u32, u32, u32, u32, u8 *, u32, u32, u32);
577 
578 #endif /* __NES_H */