1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4  * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
5  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
6  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
7  *
8  * This software is available to you under a choice of one of two
9  * licenses.  You may choose to be licensed under the terms of the GNU
10  * General Public License (GPL) Version 2, available from the file
11  * COPYING in the main directory of this source tree, or the
12  * OpenIB.org BSD license below:
13  *
14  *     Redistribution and use in source and binary forms, with or
15  *     without modification, are permitted provided that the following
16  *     conditions are met:
17  *
18  *      - Redistributions of source code must retain the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer.
21  *
22  *      - Redistributions in binary form must reproduce the above
23  *        copyright notice, this list of conditions and the following
24  *        disclaimer in the documentation and/or other materials
25  *        provided with the distribution.
26  *
27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34  * SOFTWARE.
35  */
36 
37 #ifndef MTHCA_DEV_H
38 #define MTHCA_DEV_H
39 
40 #include <linux/spinlock.h>
41 #include <linux/kernel.h>
42 #include <linux/pci.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/timer.h>
45 #include <linux/mutex.h>
46 #include <linux/list.h>
47 #include <linux/semaphore.h>
48 
49 #include "mthca_provider.h"
50 #include "mthca_doorbell.h"
51 
52 #define DRV_NAME	"ib_mthca"
53 #define PFX		DRV_NAME ": "
54 #define DRV_VERSION	"1.0"
55 #define DRV_RELDATE	"April 4, 2008"
56 
57 enum {
58 	MTHCA_FLAG_DDR_HIDDEN = 1 << 1,
59 	MTHCA_FLAG_SRQ        = 1 << 2,
60 	MTHCA_FLAG_MSI_X      = 1 << 3,
61 	MTHCA_FLAG_NO_LAM     = 1 << 4,
62 	MTHCA_FLAG_FMR        = 1 << 5,
63 	MTHCA_FLAG_MEMFREE    = 1 << 6,
64 	MTHCA_FLAG_PCIE       = 1 << 7,
65 	MTHCA_FLAG_SINAI_OPT  = 1 << 8
66 };
67 
68 enum {
69 	MTHCA_MAX_PORTS = 2
70 };
71 
72 enum {
73 	MTHCA_BOARD_ID_LEN = 64
74 };
75 
76 enum {
77 	MTHCA_EQ_CONTEXT_SIZE =  0x40,
78 	MTHCA_CQ_CONTEXT_SIZE =  0x40,
79 	MTHCA_QP_CONTEXT_SIZE = 0x200,
80 	MTHCA_RDB_ENTRY_SIZE  =  0x20,
81 	MTHCA_AV_SIZE         =  0x20,
82 	MTHCA_MGM_ENTRY_SIZE  = 0x100,
83 
84 	/* Arbel FW gives us these, but we need them for Tavor */
85 	MTHCA_MPT_ENTRY_SIZE  =  0x40,
86 	MTHCA_MTT_SEG_SIZE    =  0x40,
87 
88 	MTHCA_QP_PER_MGM      = 4 * (MTHCA_MGM_ENTRY_SIZE / 16 - 2)
89 };
90 
91 enum {
92 	MTHCA_EQ_CMD,
93 	MTHCA_EQ_ASYNC,
94 	MTHCA_EQ_COMP,
95 	MTHCA_NUM_EQ
96 };
97 
98 enum {
99 	MTHCA_OPCODE_NOP            = 0x00,
100 	MTHCA_OPCODE_RDMA_WRITE     = 0x08,
101 	MTHCA_OPCODE_RDMA_WRITE_IMM = 0x09,
102 	MTHCA_OPCODE_SEND           = 0x0a,
103 	MTHCA_OPCODE_SEND_IMM       = 0x0b,
104 	MTHCA_OPCODE_RDMA_READ      = 0x10,
105 	MTHCA_OPCODE_ATOMIC_CS      = 0x11,
106 	MTHCA_OPCODE_ATOMIC_FA      = 0x12,
107 	MTHCA_OPCODE_BIND_MW        = 0x18,
108 };
109 
110 enum {
111 	MTHCA_CMD_USE_EVENTS         = 1 << 0,
112 	MTHCA_CMD_POST_DOORBELLS     = 1 << 1
113 };
114 
115 enum {
116 	MTHCA_CMD_NUM_DBELL_DWORDS = 8
117 };
118 
119 struct mthca_cmd {
120 	struct dma_pool          *pool;
121 	struct mutex              hcr_mutex;
122 	struct semaphore 	  poll_sem;
123 	struct semaphore 	  event_sem;
124 	int              	  max_cmds;
125 	spinlock_t                context_lock;
126 	int                       free_head;
127 	struct mthca_cmd_context *context;
128 	u16                       token_mask;
129 	u32                       flags;
130 	void __iomem             *dbell_map;
131 	u16                       dbell_offsets[MTHCA_CMD_NUM_DBELL_DWORDS];
132 };
133 
134 struct mthca_limits {
135 	int      num_ports;
136 	int      vl_cap;
137 	int      mtu_cap;
138 	int      gid_table_len;
139 	int      pkey_table_len;
140 	int      local_ca_ack_delay;
141 	int      num_uars;
142 	int      max_sg;
143 	int      num_qps;
144 	int      max_wqes;
145 	int	 max_desc_sz;
146 	int	 max_qp_init_rdma;
147 	int      reserved_qps;
148 	int      num_srqs;
149 	int      max_srq_wqes;
150 	int      max_srq_sge;
151 	int      reserved_srqs;
152 	int      num_eecs;
153 	int      reserved_eecs;
154 	int      num_cqs;
155 	int      max_cqes;
156 	int      reserved_cqs;
157 	int      num_eqs;
158 	int      reserved_eqs;
159 	int      num_mpts;
160 	int      num_mtt_segs;
161 	int	 mtt_seg_size;
162 	int      fmr_reserved_mtts;
163 	int      reserved_mtts;
164 	int      reserved_mrws;
165 	int      reserved_uars;
166 	int      num_mgms;
167 	int      num_amgms;
168 	int      reserved_mcgs;
169 	int      num_pds;
170 	int      reserved_pds;
171 	u32      page_size_cap;
172 	u32      flags;
173 	u16      stat_rate_support;
174 	u8       port_width_cap;
175 };
176 
177 struct mthca_alloc {
178 	u32            last;
179 	u32            top;
180 	u32            max;
181 	u32            mask;
182 	spinlock_t     lock;
183 	unsigned long *table;
184 };
185 
186 struct mthca_array {
187 	struct {
188 		void    **page;
189 		int       used;
190 	} *page_list;
191 };
192 
193 struct mthca_uar_table {
194 	struct mthca_alloc alloc;
195 	u64                uarc_base;
196 	int                uarc_size;
197 };
198 
199 struct mthca_pd_table {
200 	struct mthca_alloc alloc;
201 };
202 
203 struct mthca_buddy {
204 	unsigned long **bits;
205 	int	       *num_free;
206 	int             max_order;
207 	spinlock_t      lock;
208 };
209 
210 struct mthca_mr_table {
211 	struct mthca_alloc      mpt_alloc;
212 	struct mthca_buddy      mtt_buddy;
213 	struct mthca_buddy     *fmr_mtt_buddy;
214 	u64                     mtt_base;
215 	u64                     mpt_base;
216 	struct mthca_icm_table *mtt_table;
217 	struct mthca_icm_table *mpt_table;
218 	struct {
219 		void __iomem   *mpt_base;
220 		void __iomem   *mtt_base;
221 		struct mthca_buddy mtt_buddy;
222 	} tavor_fmr;
223 };
224 
225 struct mthca_eq_table {
226 	struct mthca_alloc alloc;
227 	void __iomem      *clr_int;
228 	u32                clr_mask;
229 	u32                arm_mask;
230 	struct mthca_eq    eq[MTHCA_NUM_EQ];
231 	u64                icm_virt;
232 	struct page       *icm_page;
233 	dma_addr_t         icm_dma;
234 	int                have_irq;
235 	u8                 inta_pin;
236 };
237 
238 struct mthca_cq_table {
239 	struct mthca_alloc 	alloc;
240 	spinlock_t         	lock;
241 	struct mthca_array      cq;
242 	struct mthca_icm_table *table;
243 };
244 
245 struct mthca_srq_table {
246 	struct mthca_alloc 	alloc;
247 	spinlock_t         	lock;
248 	struct mthca_array      srq;
249 	struct mthca_icm_table *table;
250 };
251 
252 struct mthca_qp_table {
253 	struct mthca_alloc     	alloc;
254 	u32                    	rdb_base;
255 	int                    	rdb_shift;
256 	int                    	sqp_start;
257 	spinlock_t             	lock;
258 	struct mthca_array     	qp;
259 	struct mthca_icm_table *qp_table;
260 	struct mthca_icm_table *eqp_table;
261 	struct mthca_icm_table *rdb_table;
262 };
263 
264 struct mthca_av_table {
265 	struct dma_pool   *pool;
266 	int                num_ddr_avs;
267 	u64                ddr_av_base;
268 	void __iomem      *av_map;
269 	struct mthca_alloc alloc;
270 };
271 
272 struct mthca_mcg_table {
273 	struct mutex		mutex;
274 	struct mthca_alloc 	alloc;
275 	struct mthca_icm_table *table;
276 };
277 
278 struct mthca_catas_err {
279 	u64			addr;
280 	u32 __iomem	       *map;
281 	u32			size;
282 	struct timer_list	timer;
283 	struct list_head	list;
284 };
285 
286 extern struct mutex mthca_device_mutex;
287 
288 struct mthca_dev {
289 	struct ib_device  ib_dev;
290 	struct pci_dev   *pdev;
291 
292 	int          	 hca_type;
293 	unsigned long	 mthca_flags;
294 	unsigned long    device_cap_flags;
295 
296 	u32              rev_id;
297 	char             board_id[MTHCA_BOARD_ID_LEN];
298 
299 	/* firmware info */
300 	u64              fw_ver;
301 	union {
302 		struct {
303 			u64 fw_start;
304 			u64 fw_end;
305 		}        tavor;
306 		struct {
307 			u64 clr_int_base;
308 			u64 eq_arm_base;
309 			u64 eq_set_ci_base;
310 			struct mthca_icm *fw_icm;
311 			struct mthca_icm *aux_icm;
312 			u16 fw_pages;
313 		}        arbel;
314 	}                fw;
315 
316 	u64              ddr_start;
317 	u64              ddr_end;
318 
319 	MTHCA_DECLARE_DOORBELL_LOCK(doorbell_lock)
320 	struct mutex cap_mask_mutex;
321 
322 	void __iomem    *hcr;
323 	void __iomem    *kar;
324 	void __iomem    *clr_base;
325 	union {
326 		struct {
327 			void __iomem *ecr_base;
328 		} tavor;
329 		struct {
330 			void __iomem *eq_arm;
331 			void __iomem *eq_set_ci_base;
332 		} arbel;
333 	} eq_regs;
334 
335 	struct mthca_cmd    cmd;
336 	struct mthca_limits limits;
337 
338 	struct mthca_uar_table uar_table;
339 	struct mthca_pd_table  pd_table;
340 	struct mthca_mr_table  mr_table;
341 	struct mthca_eq_table  eq_table;
342 	struct mthca_cq_table  cq_table;
343 	struct mthca_srq_table srq_table;
344 	struct mthca_qp_table  qp_table;
345 	struct mthca_av_table  av_table;
346 	struct mthca_mcg_table mcg_table;
347 
348 	struct mthca_catas_err catas_err;
349 
350 	struct mthca_uar       driver_uar;
351 	struct mthca_db_table *db_tab;
352 	struct mthca_pd        driver_pd;
353 	struct mthca_mr        driver_mr;
354 
355 	struct ib_mad_agent  *send_agent[MTHCA_MAX_PORTS][2];
356 	struct ib_ah         *sm_ah[MTHCA_MAX_PORTS];
357 	spinlock_t            sm_lock;
358 	u8                    rate[MTHCA_MAX_PORTS];
359 	bool		      active;
360 };
361 
362 #ifdef CONFIG_INFINIBAND_MTHCA_DEBUG
363 extern int mthca_debug_level;
364 
365 #define mthca_dbg(mdev, format, arg...)					\
366 	do {								\
367 		if (mthca_debug_level)					\
368 			dev_printk(KERN_DEBUG, &mdev->pdev->dev, format, ## arg); \
369 	} while (0)
370 
371 #else /* CONFIG_INFINIBAND_MTHCA_DEBUG */
372 
373 #define mthca_dbg(mdev, format, arg...) do { (void) mdev; } while (0)
374 
375 #endif /* CONFIG_INFINIBAND_MTHCA_DEBUG */
376 
377 #define mthca_err(mdev, format, arg...) \
378 	dev_err(&mdev->pdev->dev, format, ## arg)
379 #define mthca_info(mdev, format, arg...) \
380 	dev_info(&mdev->pdev->dev, format, ## arg)
381 #define mthca_warn(mdev, format, arg...) \
382 	dev_warn(&mdev->pdev->dev, format, ## arg)
383 
384 extern void __buggy_use_of_MTHCA_GET(void);
385 extern void __buggy_use_of_MTHCA_PUT(void);
386 
387 #define MTHCA_GET(dest, source, offset)                               \
388 	do {                                                          \
389 		void *__p = (char *) (source) + (offset);             \
390 		switch (sizeof (dest)) {                              \
391 		case 1: (dest) = *(u8 *) __p;       break;	      \
392 		case 2: (dest) = be16_to_cpup(__p); break;	      \
393 		case 4: (dest) = be32_to_cpup(__p); break;	      \
394 		case 8: (dest) = be64_to_cpup(__p); break;	      \
395 		default: __buggy_use_of_MTHCA_GET();		      \
396 		}                                                     \
397 	} while (0)
398 
399 #define MTHCA_PUT(dest, source, offset)                               \
400 	do {                                                          \
401 		void *__d = ((char *) (dest) + (offset));	      \
402 		switch (sizeof(source)) {                             \
403 		case 1: *(u8 *) __d = (source);                break; \
404 		case 2:	*(__be16 *) __d = cpu_to_be16(source); break; \
405 		case 4:	*(__be32 *) __d = cpu_to_be32(source); break; \
406 		case 8:	*(__be64 *) __d = cpu_to_be64(source); break; \
407 		default: __buggy_use_of_MTHCA_PUT();		      \
408 		}                                                     \
409 	} while (0)
410 
411 int mthca_reset(struct mthca_dev *mdev);
412 
413 u32 mthca_alloc(struct mthca_alloc *alloc);
414 void mthca_free(struct mthca_alloc *alloc, u32 obj);
415 int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask,
416 		     u32 reserved);
417 void mthca_alloc_cleanup(struct mthca_alloc *alloc);
418 void *mthca_array_get(struct mthca_array *array, int index);
419 int mthca_array_set(struct mthca_array *array, int index, void *value);
420 void mthca_array_clear(struct mthca_array *array, int index);
421 int mthca_array_init(struct mthca_array *array, int nent);
422 void mthca_array_cleanup(struct mthca_array *array, int nent);
423 int mthca_buf_alloc(struct mthca_dev *dev, int size, int max_direct,
424 		    union mthca_buf *buf, int *is_direct, struct mthca_pd *pd,
425 		    int hca_write, struct mthca_mr *mr);
426 void mthca_buf_free(struct mthca_dev *dev, int size, union mthca_buf *buf,
427 		    int is_direct, struct mthca_mr *mr);
428 
429 int mthca_init_uar_table(struct mthca_dev *dev);
430 int mthca_init_pd_table(struct mthca_dev *dev);
431 int mthca_init_mr_table(struct mthca_dev *dev);
432 int mthca_init_eq_table(struct mthca_dev *dev);
433 int mthca_init_cq_table(struct mthca_dev *dev);
434 int mthca_init_srq_table(struct mthca_dev *dev);
435 int mthca_init_qp_table(struct mthca_dev *dev);
436 int mthca_init_av_table(struct mthca_dev *dev);
437 int mthca_init_mcg_table(struct mthca_dev *dev);
438 
439 void mthca_cleanup_uar_table(struct mthca_dev *dev);
440 void mthca_cleanup_pd_table(struct mthca_dev *dev);
441 void mthca_cleanup_mr_table(struct mthca_dev *dev);
442 void mthca_cleanup_eq_table(struct mthca_dev *dev);
443 void mthca_cleanup_cq_table(struct mthca_dev *dev);
444 void mthca_cleanup_srq_table(struct mthca_dev *dev);
445 void mthca_cleanup_qp_table(struct mthca_dev *dev);
446 void mthca_cleanup_av_table(struct mthca_dev *dev);
447 void mthca_cleanup_mcg_table(struct mthca_dev *dev);
448 
449 int mthca_register_device(struct mthca_dev *dev);
450 void mthca_unregister_device(struct mthca_dev *dev);
451 
452 void mthca_start_catas_poll(struct mthca_dev *dev);
453 void mthca_stop_catas_poll(struct mthca_dev *dev);
454 int __mthca_restart_one(struct pci_dev *pdev);
455 int mthca_catas_init(void);
456 void mthca_catas_cleanup(void);
457 
458 int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar);
459 void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar);
460 
461 int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd);
462 void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd);
463 
464 int mthca_write_mtt_size(struct mthca_dev *dev);
465 
466 struct mthca_mtt *mthca_alloc_mtt(struct mthca_dev *dev, int size);
467 void mthca_free_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt);
468 int mthca_write_mtt(struct mthca_dev *dev, struct mthca_mtt *mtt,
469 		    int start_index, u64 *buffer_list, int list_len);
470 int mthca_mr_alloc(struct mthca_dev *dev, u32 pd, int buffer_size_shift,
471 		   u64 iova, u64 total_size, u32 access, struct mthca_mr *mr);
472 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
473 			   u32 access, struct mthca_mr *mr);
474 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
475 			u64 *buffer_list, int buffer_size_shift,
476 			int list_len, u64 iova, u64 total_size,
477 			u32 access, struct mthca_mr *mr);
478 void mthca_free_mr(struct mthca_dev *dev,  struct mthca_mr *mr);
479 
480 int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt);
481 void mthca_unmap_eq_icm(struct mthca_dev *dev);
482 
483 int mthca_poll_cq(struct ib_cq *ibcq, int num_entries,
484 		  struct ib_wc *entry);
485 int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
486 int mthca_arbel_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
487 int mthca_init_cq(struct mthca_dev *dev, int nent,
488 		  struct mthca_ucontext *ctx, u32 pdn,
489 		  struct mthca_cq *cq);
490 void mthca_free_cq(struct mthca_dev *dev,
491 		   struct mthca_cq *cq);
492 void mthca_cq_completion(struct mthca_dev *dev, u32 cqn);
493 void mthca_cq_event(struct mthca_dev *dev, u32 cqn,
494 		    enum ib_event_type event_type);
495 void mthca_cq_clean(struct mthca_dev *dev, struct mthca_cq *cq, u32 qpn,
496 		    struct mthca_srq *srq);
497 void mthca_cq_resize_copy_cqes(struct mthca_cq *cq);
498 int mthca_alloc_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int nent);
499 void mthca_free_cq_buf(struct mthca_dev *dev, struct mthca_cq_buf *buf, int cqe);
500 
501 int mthca_alloc_srq(struct mthca_dev *dev, struct mthca_pd *pd,
502 		    struct ib_srq_attr *attr, struct mthca_srq *srq,
503 		    struct ib_udata *udata);
504 void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq);
505 int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
506 		     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
507 int mthca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
508 int mthca_max_srq_sge(struct mthca_dev *dev);
509 void mthca_srq_event(struct mthca_dev *dev, u32 srqn,
510 		     enum ib_event_type event_type);
511 void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr);
512 int mthca_tavor_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *wr,
513 			      const struct ib_recv_wr **bad_wr);
514 int mthca_arbel_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *wr,
515 			      const struct ib_recv_wr **bad_wr);
516 
517 void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
518 		    enum ib_event_type event_type);
519 int mthca_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
520 		   struct ib_qp_init_attr *qp_init_attr);
521 int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
522 		    struct ib_udata *udata);
523 int mthca_tavor_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
524 			  const struct ib_send_wr **bad_wr);
525 int mthca_tavor_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
526 			     const struct ib_recv_wr **bad_wr);
527 int mthca_arbel_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
528 			  const struct ib_send_wr **bad_wr);
529 int mthca_arbel_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
530 			     const struct ib_recv_wr **bad_wr);
531 void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send,
532 			int index, int *dbd, __be32 *new_wqe);
533 int mthca_alloc_qp(struct mthca_dev *dev,
534 		   struct mthca_pd *pd,
535 		   struct mthca_cq *send_cq,
536 		   struct mthca_cq *recv_cq,
537 		   enum ib_qp_type type,
538 		   enum ib_sig_type send_policy,
539 		   struct ib_qp_cap *cap,
540 		   struct mthca_qp *qp,
541 		   struct ib_udata *udata);
542 int mthca_alloc_sqp(struct mthca_dev *dev,
543 		    struct mthca_pd *pd,
544 		    struct mthca_cq *send_cq,
545 		    struct mthca_cq *recv_cq,
546 		    enum ib_sig_type send_policy,
547 		    struct ib_qp_cap *cap,
548 		    int qpn,
549 		    int port,
550 		    struct mthca_qp *qp,
551 		    struct ib_udata *udata);
552 void mthca_free_qp(struct mthca_dev *dev, struct mthca_qp *qp);
553 int mthca_create_ah(struct mthca_dev *dev,
554 		    struct mthca_pd *pd,
555 		    struct rdma_ah_attr *ah_attr,
556 		    struct mthca_ah *ah);
557 int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah);
558 int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
559 		  struct ib_ud_header *header);
560 int mthca_ah_query(struct ib_ah *ibah, struct rdma_ah_attr *attr);
561 int mthca_ah_grh_present(struct mthca_ah *ah);
562 u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u8 port);
563 enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u8 port);
564 
565 int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
566 int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
567 
568 int mthca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
569 		      const struct ib_wc *in_wc, const struct ib_grh *in_grh,
570 		      const struct ib_mad *in, struct ib_mad *out,
571 		      size_t *out_mad_size, u16 *out_mad_pkey_index);
572 int mthca_create_agents(struct mthca_dev *dev);
573 void mthca_free_agents(struct mthca_dev *dev);
574 
575 static inline struct mthca_dev *to_mdev(struct ib_device *ibdev)
576 {
577 	return container_of(ibdev, struct mthca_dev, ib_dev);
578 }
579 
580 static inline int mthca_is_memfree(struct mthca_dev *dev)
581 {
582 	return dev->mthca_flags & MTHCA_FLAG_MEMFREE;
583 }
584 
585 #endif /* MTHCA_DEV_H */
586