1 /*
2 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * Based in part upon the original driver by Mellanox Technologies
5 * Ltd. Portions may be Copyright (c) Mellanox Technologies Ltd.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 * You can also choose to distribute this program under the terms of
23 * the Unmodified Binary Distribution Licence (as given in the file
24 * COPYING.UBDL), provided that you have satisfied its requirements.
25 */
26
27 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
28
29 #include <stdint.h>
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <strings.h>
34 #include <unistd.h>
35 #include <errno.h>
36 #include <byteswap.h>
37 #include <ipxe/io.h>
38 #include <ipxe/pci.h>
39 #include <ipxe/pcibackup.h>
40 #include <ipxe/malloc.h>
41 #include <ipxe/umalloc.h>
42 #include <ipxe/iobuf.h>
43 #include <ipxe/netdevice.h>
44 #include <ipxe/infiniband.h>
45 #include <ipxe/ib_smc.h>
46 #include "arbel.h"
47
48 /**
49 * @file
50 *
51 * Mellanox Arbel Infiniband HCA
52 *
53 */
54
55 /***************************************************************************
56 *
57 * Queue number allocation
58 *
59 ***************************************************************************
60 */
61
62 /**
63 * Allocate offset within usage bitmask
64 *
65 * @v bits Usage bitmask
66 * @v bits_len Length of usage bitmask
67 * @ret bit First free bit within bitmask, or negative error
68 */
arbel_bitmask_alloc(arbel_bitmask_t * bits,unsigned int bits_len)69 static int arbel_bitmask_alloc ( arbel_bitmask_t *bits,
70 unsigned int bits_len ) {
71 unsigned int bit = 0;
72 arbel_bitmask_t mask = 1;
73
74 while ( bit < bits_len ) {
75 if ( ( mask & *bits ) == 0 ) {
76 *bits |= mask;
77 return bit;
78 }
79 bit++;
80 mask = ( mask << 1 ) | ( mask >> ( 8 * sizeof ( mask ) - 1 ) );
81 if ( mask == 1 )
82 bits++;
83 }
84 return -ENFILE;
85 }
86
87 /**
88 * Free offset within usage bitmask
89 *
90 * @v bits Usage bitmask
91 * @v bit Bit within bitmask
92 */
arbel_bitmask_free(arbel_bitmask_t * bits,int bit)93 static void arbel_bitmask_free ( arbel_bitmask_t *bits, int bit ) {
94 arbel_bitmask_t mask;
95
96 mask = ( 1 << ( bit % ( 8 * sizeof ( mask ) ) ) );
97 bits += ( bit / ( 8 * sizeof ( mask ) ) );
98 *bits &= ~mask;
99 }
100
101 /***************************************************************************
102 *
103 * HCA commands
104 *
105 ***************************************************************************
106 */
107
108 /**
109 * Wait for Arbel command completion
110 *
111 * @v arbel Arbel device
112 * @ret rc Return status code
113 */
arbel_cmd_wait(struct arbel * arbel,struct arbelprm_hca_command_register * hcr)114 static int arbel_cmd_wait ( struct arbel *arbel,
115 struct arbelprm_hca_command_register *hcr ) {
116 unsigned int wait;
117
118 for ( wait = ARBEL_HCR_MAX_WAIT_MS ; wait ; wait-- ) {
119 hcr->u.dwords[6] =
120 readl ( arbel->config + ARBEL_HCR_REG ( 6 ) );
121 if ( MLX_GET ( hcr, go ) == 0 )
122 return 0;
123 mdelay ( 1 );
124 }
125 return -EBUSY;
126 }
127
128 /**
129 * Issue HCA command
130 *
131 * @v arbel Arbel device
132 * @v command Command opcode, flags and input/output lengths
133 * @v op_mod Opcode modifier (0 if no modifier applicable)
134 * @v in Input parameters
135 * @v in_mod Input modifier (0 if no modifier applicable)
136 * @v out Output parameters
137 * @ret rc Return status code
138 */
arbel_cmd(struct arbel * arbel,unsigned long command,unsigned int op_mod,const void * in,unsigned int in_mod,void * out)139 static int arbel_cmd ( struct arbel *arbel, unsigned long command,
140 unsigned int op_mod, const void *in,
141 unsigned int in_mod, void *out ) {
142 struct arbelprm_hca_command_register hcr;
143 unsigned int opcode = ARBEL_HCR_OPCODE ( command );
144 size_t in_len = ARBEL_HCR_IN_LEN ( command );
145 size_t out_len = ARBEL_HCR_OUT_LEN ( command );
146 void *in_buffer;
147 void *out_buffer;
148 unsigned int status;
149 unsigned int i;
150 int rc;
151
152 assert ( in_len <= ARBEL_MBOX_SIZE );
153 assert ( out_len <= ARBEL_MBOX_SIZE );
154
155 DBGC2 ( arbel, "Arbel %p command %02x in %zx%s out %zx%s\n",
156 arbel, opcode, in_len,
157 ( ( command & ARBEL_HCR_IN_MBOX ) ? "(mbox)" : "" ), out_len,
158 ( ( command & ARBEL_HCR_OUT_MBOX ) ? "(mbox)" : "" ) );
159
160 /* Check that HCR is free */
161 if ( ( rc = arbel_cmd_wait ( arbel, &hcr ) ) != 0 ) {
162 DBGC ( arbel, "Arbel %p command interface locked\n", arbel );
163 return rc;
164 }
165
166 /* Prepare HCR */
167 memset ( &hcr, 0, sizeof ( hcr ) );
168 in_buffer = &hcr.u.dwords[0];
169 if ( in_len && ( command & ARBEL_HCR_IN_MBOX ) ) {
170 in_buffer = arbel->mailbox_in;
171 MLX_FILL_H ( &hcr, 0, in_param_h, virt_to_bus ( in_buffer ) );
172 MLX_FILL_1 ( &hcr, 1, in_param_l, virt_to_bus ( in_buffer ) );
173 }
174 memcpy ( in_buffer, in, in_len );
175 MLX_FILL_1 ( &hcr, 2, input_modifier, in_mod );
176 out_buffer = &hcr.u.dwords[3];
177 if ( out_len && ( command & ARBEL_HCR_OUT_MBOX ) ) {
178 out_buffer = arbel->mailbox_out;
179 MLX_FILL_H ( &hcr, 3, out_param_h,
180 virt_to_bus ( out_buffer ) );
181 MLX_FILL_1 ( &hcr, 4, out_param_l,
182 virt_to_bus ( out_buffer ) );
183 }
184 MLX_FILL_3 ( &hcr, 6,
185 opcode, opcode,
186 opcode_modifier, op_mod,
187 go, 1 );
188 DBGC ( arbel, "Arbel %p issuing command %04x\n", arbel, opcode );
189 DBGC2_HDA ( arbel, virt_to_phys ( arbel->config + ARBEL_HCR_BASE ),
190 &hcr, sizeof ( hcr ) );
191 if ( in_len && ( command & ARBEL_HCR_IN_MBOX ) ) {
192 DBGC2 ( arbel, "Input mailbox:\n" );
193 DBGC2_HDA ( arbel, virt_to_phys ( in_buffer ), in_buffer,
194 ( ( in_len < 512 ) ? in_len : 512 ) );
195 }
196
197 /* Issue command */
198 for ( i = 0 ; i < ( sizeof ( hcr ) / sizeof ( hcr.u.dwords[0] ) ) ;
199 i++ ) {
200 writel ( hcr.u.dwords[i],
201 arbel->config + ARBEL_HCR_REG ( i ) );
202 barrier();
203 }
204
205 /* Wait for command completion */
206 if ( ( rc = arbel_cmd_wait ( arbel, &hcr ) ) != 0 ) {
207 DBGC ( arbel, "Arbel %p timed out waiting for command:\n",
208 arbel );
209 DBGC_HD ( arbel, &hcr, sizeof ( hcr ) );
210 return rc;
211 }
212
213 /* Check command status */
214 status = MLX_GET ( &hcr, status );
215 if ( status != 0 ) {
216 DBGC ( arbel, "Arbel %p command failed with status %02x:\n",
217 arbel, status );
218 DBGC_HD ( arbel, &hcr, sizeof ( hcr ) );
219 return -EIO;
220 }
221
222 /* Read output parameters, if any */
223 hcr.u.dwords[3] = readl ( arbel->config + ARBEL_HCR_REG ( 3 ) );
224 hcr.u.dwords[4] = readl ( arbel->config + ARBEL_HCR_REG ( 4 ) );
225 memcpy ( out, out_buffer, out_len );
226 if ( out_len ) {
227 DBGC2 ( arbel, "Output%s:\n",
228 ( command & ARBEL_HCR_OUT_MBOX ) ? " mailbox" : "" );
229 DBGC2_HDA ( arbel, virt_to_phys ( out_buffer ), out_buffer,
230 ( ( out_len < 512 ) ? out_len : 512 ) );
231 }
232
233 return 0;
234 }
235
236 static inline int
arbel_cmd_query_dev_lim(struct arbel * arbel,struct arbelprm_query_dev_lim * dev_lim)237 arbel_cmd_query_dev_lim ( struct arbel *arbel,
238 struct arbelprm_query_dev_lim *dev_lim ) {
239 return arbel_cmd ( arbel,
240 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_DEV_LIM,
241 1, sizeof ( *dev_lim ) ),
242 0, NULL, 0, dev_lim );
243 }
244
245 static inline int
arbel_cmd_query_fw(struct arbel * arbel,struct arbelprm_query_fw * fw)246 arbel_cmd_query_fw ( struct arbel *arbel, struct arbelprm_query_fw *fw ) {
247 return arbel_cmd ( arbel,
248 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_FW,
249 1, sizeof ( *fw ) ),
250 0, NULL, 0, fw );
251 }
252
253 static inline int
arbel_cmd_init_hca(struct arbel * arbel,const struct arbelprm_init_hca * init_hca)254 arbel_cmd_init_hca ( struct arbel *arbel,
255 const struct arbelprm_init_hca *init_hca ) {
256 return arbel_cmd ( arbel,
257 ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT_HCA,
258 1, sizeof ( *init_hca ) ),
259 0, init_hca, 0, NULL );
260 }
261
262 static inline int
arbel_cmd_close_hca(struct arbel * arbel)263 arbel_cmd_close_hca ( struct arbel *arbel ) {
264 return arbel_cmd ( arbel,
265 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CLOSE_HCA ),
266 0, NULL, 0, NULL );
267 }
268
269 static inline int
arbel_cmd_init_ib(struct arbel * arbel,unsigned int port,const struct arbelprm_init_ib * init_ib)270 arbel_cmd_init_ib ( struct arbel *arbel, unsigned int port,
271 const struct arbelprm_init_ib *init_ib ) {
272 return arbel_cmd ( arbel,
273 ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT_IB,
274 1, sizeof ( *init_ib ) ),
275 0, init_ib, port, NULL );
276 }
277
278 static inline int
arbel_cmd_close_ib(struct arbel * arbel,unsigned int port)279 arbel_cmd_close_ib ( struct arbel *arbel, unsigned int port ) {
280 return arbel_cmd ( arbel,
281 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CLOSE_IB ),
282 0, NULL, port, NULL );
283 }
284
285 static inline int
arbel_cmd_sw2hw_mpt(struct arbel * arbel,unsigned int index,const struct arbelprm_mpt * mpt)286 arbel_cmd_sw2hw_mpt ( struct arbel *arbel, unsigned int index,
287 const struct arbelprm_mpt *mpt ) {
288 return arbel_cmd ( arbel,
289 ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_MPT,
290 1, sizeof ( *mpt ) ),
291 0, mpt, index, NULL );
292 }
293
294 static inline int
arbel_cmd_map_eq(struct arbel * arbel,unsigned long index_map,const struct arbelprm_event_mask * mask)295 arbel_cmd_map_eq ( struct arbel *arbel, unsigned long index_map,
296 const struct arbelprm_event_mask *mask ) {
297 return arbel_cmd ( arbel,
298 ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_EQ,
299 0, sizeof ( *mask ) ),
300 0, mask, index_map, NULL );
301 }
302
303 static inline int
arbel_cmd_sw2hw_eq(struct arbel * arbel,unsigned int index,const struct arbelprm_eqc * eqctx)304 arbel_cmd_sw2hw_eq ( struct arbel *arbel, unsigned int index,
305 const struct arbelprm_eqc *eqctx ) {
306 return arbel_cmd ( arbel,
307 ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_EQ,
308 1, sizeof ( *eqctx ) ),
309 0, eqctx, index, NULL );
310 }
311
312 static inline int
arbel_cmd_hw2sw_eq(struct arbel * arbel,unsigned int index,struct arbelprm_eqc * eqctx)313 arbel_cmd_hw2sw_eq ( struct arbel *arbel, unsigned int index,
314 struct arbelprm_eqc *eqctx ) {
315 return arbel_cmd ( arbel,
316 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_HW2SW_EQ,
317 1, sizeof ( *eqctx ) ),
318 1, NULL, index, eqctx );
319 }
320
321 static inline int
arbel_cmd_sw2hw_cq(struct arbel * arbel,unsigned long cqn,const struct arbelprm_completion_queue_context * cqctx)322 arbel_cmd_sw2hw_cq ( struct arbel *arbel, unsigned long cqn,
323 const struct arbelprm_completion_queue_context *cqctx ) {
324 return arbel_cmd ( arbel,
325 ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_CQ,
326 1, sizeof ( *cqctx ) ),
327 0, cqctx, cqn, NULL );
328 }
329
330 static inline int
arbel_cmd_hw2sw_cq(struct arbel * arbel,unsigned long cqn,struct arbelprm_completion_queue_context * cqctx)331 arbel_cmd_hw2sw_cq ( struct arbel *arbel, unsigned long cqn,
332 struct arbelprm_completion_queue_context *cqctx) {
333 return arbel_cmd ( arbel,
334 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_HW2SW_CQ,
335 1, sizeof ( *cqctx ) ),
336 0, NULL, cqn, cqctx );
337 }
338
339 static inline int
arbel_cmd_query_cq(struct arbel * arbel,unsigned long cqn,struct arbelprm_completion_queue_context * cqctx)340 arbel_cmd_query_cq ( struct arbel *arbel, unsigned long cqn,
341 struct arbelprm_completion_queue_context *cqctx ) {
342 return arbel_cmd ( arbel,
343 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_CQ,
344 1, sizeof ( *cqctx ) ),
345 0, NULL, cqn, cqctx );
346 }
347
348 static inline int
arbel_cmd_rst2init_qpee(struct arbel * arbel,unsigned long qpn,const struct arbelprm_qp_ee_state_transitions * ctx)349 arbel_cmd_rst2init_qpee ( struct arbel *arbel, unsigned long qpn,
350 const struct arbelprm_qp_ee_state_transitions *ctx ){
351 return arbel_cmd ( arbel,
352 ARBEL_HCR_IN_CMD ( ARBEL_HCR_RST2INIT_QPEE,
353 1, sizeof ( *ctx ) ),
354 0, ctx, qpn, NULL );
355 }
356
357 static inline int
arbel_cmd_init2rtr_qpee(struct arbel * arbel,unsigned long qpn,const struct arbelprm_qp_ee_state_transitions * ctx)358 arbel_cmd_init2rtr_qpee ( struct arbel *arbel, unsigned long qpn,
359 const struct arbelprm_qp_ee_state_transitions *ctx ){
360 return arbel_cmd ( arbel,
361 ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT2RTR_QPEE,
362 1, sizeof ( *ctx ) ),
363 0, ctx, qpn, NULL );
364 }
365
366 static inline int
arbel_cmd_rtr2rts_qpee(struct arbel * arbel,unsigned long qpn,const struct arbelprm_qp_ee_state_transitions * ctx)367 arbel_cmd_rtr2rts_qpee ( struct arbel *arbel, unsigned long qpn,
368 const struct arbelprm_qp_ee_state_transitions *ctx ) {
369 return arbel_cmd ( arbel,
370 ARBEL_HCR_IN_CMD ( ARBEL_HCR_RTR2RTS_QPEE,
371 1, sizeof ( *ctx ) ),
372 0, ctx, qpn, NULL );
373 }
374
375 static inline int
arbel_cmd_rts2rts_qpee(struct arbel * arbel,unsigned long qpn,const struct arbelprm_qp_ee_state_transitions * ctx)376 arbel_cmd_rts2rts_qpee ( struct arbel *arbel, unsigned long qpn,
377 const struct arbelprm_qp_ee_state_transitions *ctx ) {
378 return arbel_cmd ( arbel,
379 ARBEL_HCR_IN_CMD ( ARBEL_HCR_RTS2RTS_QPEE,
380 1, sizeof ( *ctx ) ),
381 0, ctx, qpn, NULL );
382 }
383
384 static inline int
arbel_cmd_2rst_qpee(struct arbel * arbel,unsigned long qpn)385 arbel_cmd_2rst_qpee ( struct arbel *arbel, unsigned long qpn ) {
386 return arbel_cmd ( arbel,
387 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_2RST_QPEE ),
388 0x03, NULL, qpn, NULL );
389 }
390
391 static inline int
arbel_cmd_query_qpee(struct arbel * arbel,unsigned long qpn,struct arbelprm_qp_ee_state_transitions * ctx)392 arbel_cmd_query_qpee ( struct arbel *arbel, unsigned long qpn,
393 struct arbelprm_qp_ee_state_transitions *ctx ) {
394 return arbel_cmd ( arbel,
395 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_QPEE,
396 1, sizeof ( *ctx ) ),
397 0, NULL, qpn, ctx );
398 }
399
400 static inline int
arbel_cmd_conf_special_qp(struct arbel * arbel,unsigned int qp_type,unsigned long base_qpn)401 arbel_cmd_conf_special_qp ( struct arbel *arbel, unsigned int qp_type,
402 unsigned long base_qpn ) {
403 return arbel_cmd ( arbel,
404 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CONF_SPECIAL_QP ),
405 qp_type, NULL, base_qpn, NULL );
406 }
407
408 static inline int
arbel_cmd_mad_ifc(struct arbel * arbel,unsigned int port,union arbelprm_mad * mad)409 arbel_cmd_mad_ifc ( struct arbel *arbel, unsigned int port,
410 union arbelprm_mad *mad ) {
411 return arbel_cmd ( arbel,
412 ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_MAD_IFC,
413 1, sizeof ( *mad ),
414 1, sizeof ( *mad ) ),
415 0x03, mad, port, mad );
416 }
417
418 static inline int
arbel_cmd_read_mgm(struct arbel * arbel,unsigned int index,struct arbelprm_mgm_entry * mgm)419 arbel_cmd_read_mgm ( struct arbel *arbel, unsigned int index,
420 struct arbelprm_mgm_entry *mgm ) {
421 return arbel_cmd ( arbel,
422 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_READ_MGM,
423 1, sizeof ( *mgm ) ),
424 0, NULL, index, mgm );
425 }
426
427 static inline int
arbel_cmd_write_mgm(struct arbel * arbel,unsigned int index,const struct arbelprm_mgm_entry * mgm)428 arbel_cmd_write_mgm ( struct arbel *arbel, unsigned int index,
429 const struct arbelprm_mgm_entry *mgm ) {
430 return arbel_cmd ( arbel,
431 ARBEL_HCR_IN_CMD ( ARBEL_HCR_WRITE_MGM,
432 1, sizeof ( *mgm ) ),
433 0, mgm, index, NULL );
434 }
435
436 static inline int
arbel_cmd_mgid_hash(struct arbel * arbel,const union ib_gid * gid,struct arbelprm_mgm_hash * hash)437 arbel_cmd_mgid_hash ( struct arbel *arbel, const union ib_gid *gid,
438 struct arbelprm_mgm_hash *hash ) {
439 return arbel_cmd ( arbel,
440 ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_MGID_HASH,
441 1, sizeof ( *gid ),
442 0, sizeof ( *hash ) ),
443 0, gid, 0, hash );
444 }
445
446 static inline int
arbel_cmd_run_fw(struct arbel * arbel)447 arbel_cmd_run_fw ( struct arbel *arbel ) {
448 return arbel_cmd ( arbel,
449 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_RUN_FW ),
450 0, NULL, 0, NULL );
451 }
452
453 static inline int
arbel_cmd_disable_lam(struct arbel * arbel)454 arbel_cmd_disable_lam ( struct arbel *arbel ) {
455 return arbel_cmd ( arbel,
456 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_DISABLE_LAM ),
457 0, NULL, 0, NULL );
458 }
459
460 static inline int
arbel_cmd_enable_lam(struct arbel * arbel,struct arbelprm_access_lam * lam)461 arbel_cmd_enable_lam ( struct arbel *arbel, struct arbelprm_access_lam *lam ) {
462 return arbel_cmd ( arbel,
463 ARBEL_HCR_OUT_CMD ( ARBEL_HCR_ENABLE_LAM,
464 1, sizeof ( *lam ) ),
465 1, NULL, 0, lam );
466 }
467
468 static inline int
arbel_cmd_unmap_icm(struct arbel * arbel,unsigned int page_count,const struct arbelprm_scalar_parameter * offset)469 arbel_cmd_unmap_icm ( struct arbel *arbel, unsigned int page_count,
470 const struct arbelprm_scalar_parameter *offset ) {
471 return arbel_cmd ( arbel,
472 ARBEL_HCR_IN_CMD ( ARBEL_HCR_UNMAP_ICM, 0,
473 sizeof ( *offset ) ),
474 0, offset, page_count, NULL );
475 }
476
477 static inline int
arbel_cmd_map_icm(struct arbel * arbel,const struct arbelprm_virtual_physical_mapping * map)478 arbel_cmd_map_icm ( struct arbel *arbel,
479 const struct arbelprm_virtual_physical_mapping *map ) {
480 return arbel_cmd ( arbel,
481 ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_ICM,
482 1, sizeof ( *map ) ),
483 0, map, 1, NULL );
484 }
485
486 static inline int
arbel_cmd_unmap_icm_aux(struct arbel * arbel)487 arbel_cmd_unmap_icm_aux ( struct arbel *arbel ) {
488 return arbel_cmd ( arbel,
489 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_UNMAP_ICM_AUX ),
490 0, NULL, 0, NULL );
491 }
492
493 static inline int
arbel_cmd_map_icm_aux(struct arbel * arbel,const struct arbelprm_virtual_physical_mapping * map)494 arbel_cmd_map_icm_aux ( struct arbel *arbel,
495 const struct arbelprm_virtual_physical_mapping *map ) {
496 return arbel_cmd ( arbel,
497 ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_ICM_AUX,
498 1, sizeof ( *map ) ),
499 0, map, 1, NULL );
500 }
501
502 static inline int
arbel_cmd_set_icm_size(struct arbel * arbel,const struct arbelprm_scalar_parameter * icm_size,struct arbelprm_scalar_parameter * icm_aux_size)503 arbel_cmd_set_icm_size ( struct arbel *arbel,
504 const struct arbelprm_scalar_parameter *icm_size,
505 struct arbelprm_scalar_parameter *icm_aux_size ) {
506 return arbel_cmd ( arbel,
507 ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_SET_ICM_SIZE,
508 0, sizeof ( *icm_size ),
509 0, sizeof ( *icm_aux_size ) ),
510 0, icm_size, 0, icm_aux_size );
511 }
512
513 static inline int
arbel_cmd_unmap_fa(struct arbel * arbel)514 arbel_cmd_unmap_fa ( struct arbel *arbel ) {
515 return arbel_cmd ( arbel,
516 ARBEL_HCR_VOID_CMD ( ARBEL_HCR_UNMAP_FA ),
517 0, NULL, 0, NULL );
518 }
519
520 static inline int
arbel_cmd_map_fa(struct arbel * arbel,const struct arbelprm_virtual_physical_mapping * map)521 arbel_cmd_map_fa ( struct arbel *arbel,
522 const struct arbelprm_virtual_physical_mapping *map ) {
523 return arbel_cmd ( arbel,
524 ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_FA,
525 1, sizeof ( *map ) ),
526 0, map, 1, NULL );
527 }
528
529 /***************************************************************************
530 *
531 * MAD operations
532 *
533 ***************************************************************************
534 */
535
536 /**
537 * Issue management datagram
538 *
539 * @v ibdev Infiniband device
540 * @v mad Management datagram
541 * @ret rc Return status code
542 */
arbel_mad(struct ib_device * ibdev,union ib_mad * mad)543 static int arbel_mad ( struct ib_device *ibdev, union ib_mad *mad ) {
544 struct arbel *arbel = ib_get_drvdata ( ibdev );
545 union arbelprm_mad mad_ifc;
546 int rc;
547
548 linker_assert ( sizeof ( *mad ) == sizeof ( mad_ifc.mad ),
549 mad_size_mismatch );
550
551 /* Copy in request packet */
552 memcpy ( &mad_ifc.mad, mad, sizeof ( mad_ifc.mad ) );
553
554 /* Issue MAD */
555 if ( ( rc = arbel_cmd_mad_ifc ( arbel, ibdev->port,
556 &mad_ifc ) ) != 0 ) {
557 DBGC ( arbel, "Arbel %p port %d could not issue MAD IFC: %s\n",
558 arbel, ibdev->port, strerror ( rc ) );
559 return rc;
560 }
561
562 /* Copy out reply packet */
563 memcpy ( mad, &mad_ifc.mad, sizeof ( *mad ) );
564
565 if ( mad->hdr.status != 0 ) {
566 DBGC ( arbel, "Arbel %p port %d MAD IFC status %04x\n",
567 arbel, ibdev->port, ntohs ( mad->hdr.status ) );
568 return -EIO;
569 }
570 return 0;
571 }
572
573 /***************************************************************************
574 *
575 * Completion queue operations
576 *
577 ***************************************************************************
578 */
579
580 /**
581 * Dump completion queue context (for debugging only)
582 *
583 * @v arbel Arbel device
584 * @v cq Completion queue
585 * @ret rc Return status code
586 */
587 static __attribute__ (( unused )) int
arbel_dump_cqctx(struct arbel * arbel,struct ib_completion_queue * cq)588 arbel_dump_cqctx ( struct arbel *arbel, struct ib_completion_queue *cq ) {
589 struct arbelprm_completion_queue_context cqctx;
590 int rc;
591
592 memset ( &cqctx, 0, sizeof ( cqctx ) );
593 if ( ( rc = arbel_cmd_query_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) {
594 DBGC ( arbel, "Arbel %p CQN %#lx QUERY_CQ failed: %s\n",
595 arbel, cq->cqn, strerror ( rc ) );
596 return rc;
597 }
598 DBGC ( arbel, "Arbel %p CQN %#lx context:\n", arbel, cq->cqn );
599 DBGC_HDA ( arbel, 0, &cqctx, sizeof ( cqctx ) );
600
601 return 0;
602 }
603
604 /**
605 * Create completion queue
606 *
607 * @v ibdev Infiniband device
608 * @v cq Completion queue
609 * @ret rc Return status code
610 */
arbel_create_cq(struct ib_device * ibdev,struct ib_completion_queue * cq)611 static int arbel_create_cq ( struct ib_device *ibdev,
612 struct ib_completion_queue *cq ) {
613 struct arbel *arbel = ib_get_drvdata ( ibdev );
614 struct arbel_completion_queue *arbel_cq;
615 struct arbelprm_completion_queue_context cqctx;
616 struct arbelprm_cq_ci_db_record *ci_db_rec;
617 struct arbelprm_cq_arm_db_record *arm_db_rec;
618 int cqn_offset;
619 unsigned int i;
620 int rc;
621
622 /* Find a free completion queue number */
623 cqn_offset = arbel_bitmask_alloc ( arbel->cq_inuse, ARBEL_MAX_CQS );
624 if ( cqn_offset < 0 ) {
625 DBGC ( arbel, "Arbel %p out of completion queues\n", arbel );
626 rc = cqn_offset;
627 goto err_cqn_offset;
628 }
629 cq->cqn = ( arbel->limits.reserved_cqs + cqn_offset );
630
631 /* Allocate control structures */
632 arbel_cq = zalloc ( sizeof ( *arbel_cq ) );
633 if ( ! arbel_cq ) {
634 rc = -ENOMEM;
635 goto err_arbel_cq;
636 }
637 arbel_cq->ci_doorbell_idx = arbel_cq_ci_doorbell_idx ( arbel, cq );
638 arbel_cq->arm_doorbell_idx = arbel_cq_arm_doorbell_idx ( arbel, cq );
639
640 /* Allocate completion queue itself */
641 arbel_cq->cqe_size = ( cq->num_cqes * sizeof ( arbel_cq->cqe[0] ) );
642 arbel_cq->cqe = malloc_dma ( arbel_cq->cqe_size,
643 sizeof ( arbel_cq->cqe[0] ) );
644 if ( ! arbel_cq->cqe ) {
645 rc = -ENOMEM;
646 goto err_cqe;
647 }
648 memset ( arbel_cq->cqe, 0, arbel_cq->cqe_size );
649 for ( i = 0 ; i < cq->num_cqes ; i++ ) {
650 MLX_FILL_1 ( &arbel_cq->cqe[i].normal, 7, owner, 1 );
651 }
652 barrier();
653
654 /* Initialise doorbell records */
655 ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci;
656 MLX_FILL_1 ( ci_db_rec, 0, counter, 0 );
657 MLX_FILL_2 ( ci_db_rec, 1,
658 res, ARBEL_UAR_RES_CQ_CI,
659 cq_number, cq->cqn );
660 arm_db_rec = &arbel->db_rec[arbel_cq->arm_doorbell_idx].cq_arm;
661 MLX_FILL_1 ( arm_db_rec, 0, counter, 0 );
662 MLX_FILL_2 ( arm_db_rec, 1,
663 res, ARBEL_UAR_RES_CQ_ARM,
664 cq_number, cq->cqn );
665
666 /* Hand queue over to hardware */
667 memset ( &cqctx, 0, sizeof ( cqctx ) );
668 MLX_FILL_1 ( &cqctx, 0, st, 0xa /* "Event fired" */ );
669 MLX_FILL_H ( &cqctx, 1, start_address_h,
670 virt_to_bus ( arbel_cq->cqe ) );
671 MLX_FILL_1 ( &cqctx, 2, start_address_l,
672 virt_to_bus ( arbel_cq->cqe ) );
673 MLX_FILL_2 ( &cqctx, 3,
674 usr_page, arbel->limits.reserved_uars,
675 log_cq_size, fls ( cq->num_cqes - 1 ) );
676 MLX_FILL_1 ( &cqctx, 5, c_eqn, arbel->eq.eqn );
677 MLX_FILL_1 ( &cqctx, 6, pd, ARBEL_GLOBAL_PD );
678 MLX_FILL_1 ( &cqctx, 7, l_key, arbel->lkey );
679 MLX_FILL_1 ( &cqctx, 12, cqn, cq->cqn );
680 MLX_FILL_1 ( &cqctx, 13,
681 cq_ci_db_record, arbel_cq->ci_doorbell_idx );
682 MLX_FILL_1 ( &cqctx, 14,
683 cq_state_db_record, arbel_cq->arm_doorbell_idx );
684 if ( ( rc = arbel_cmd_sw2hw_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) {
685 DBGC ( arbel, "Arbel %p CQN %#lx SW2HW_CQ failed: %s\n",
686 arbel, cq->cqn, strerror ( rc ) );
687 goto err_sw2hw_cq;
688 }
689
690 DBGC ( arbel, "Arbel %p CQN %#lx ring [%08lx,%08lx), doorbell %08lx\n",
691 arbel, cq->cqn, virt_to_phys ( arbel_cq->cqe ),
692 ( virt_to_phys ( arbel_cq->cqe ) + arbel_cq->cqe_size ),
693 virt_to_phys ( ci_db_rec ) );
694 ib_cq_set_drvdata ( cq, arbel_cq );
695 return 0;
696
697 err_sw2hw_cq:
698 MLX_FILL_1 ( ci_db_rec, 1, res, ARBEL_UAR_RES_NONE );
699 MLX_FILL_1 ( arm_db_rec, 1, res, ARBEL_UAR_RES_NONE );
700 free_dma ( arbel_cq->cqe, arbel_cq->cqe_size );
701 err_cqe:
702 free ( arbel_cq );
703 err_arbel_cq:
704 arbel_bitmask_free ( arbel->cq_inuse, cqn_offset );
705 err_cqn_offset:
706 return rc;
707 }
708
709 /**
710 * Destroy completion queue
711 *
712 * @v ibdev Infiniband device
713 * @v cq Completion queue
714 */
arbel_destroy_cq(struct ib_device * ibdev,struct ib_completion_queue * cq)715 static void arbel_destroy_cq ( struct ib_device *ibdev,
716 struct ib_completion_queue *cq ) {
717 struct arbel *arbel = ib_get_drvdata ( ibdev );
718 struct arbel_completion_queue *arbel_cq = ib_cq_get_drvdata ( cq );
719 struct arbelprm_completion_queue_context cqctx;
720 struct arbelprm_cq_ci_db_record *ci_db_rec;
721 struct arbelprm_cq_arm_db_record *arm_db_rec;
722 int cqn_offset;
723 int rc;
724
725 /* Take ownership back from hardware */
726 if ( ( rc = arbel_cmd_hw2sw_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) {
727 DBGC ( arbel, "Arbel %p CQN %#lx FATAL HW2SW_CQ failed: "
728 "%s\n", arbel, cq->cqn, strerror ( rc ) );
729 /* Leak memory and return; at least we avoid corruption */
730 return;
731 }
732
733 /* Clear doorbell records */
734 ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci;
735 arm_db_rec = &arbel->db_rec[arbel_cq->arm_doorbell_idx].cq_arm;
736 MLX_FILL_1 ( ci_db_rec, 1, res, ARBEL_UAR_RES_NONE );
737 MLX_FILL_1 ( arm_db_rec, 1, res, ARBEL_UAR_RES_NONE );
738
739 /* Free memory */
740 free_dma ( arbel_cq->cqe, arbel_cq->cqe_size );
741 free ( arbel_cq );
742
743 /* Mark queue number as free */
744 cqn_offset = ( cq->cqn - arbel->limits.reserved_cqs );
745 arbel_bitmask_free ( arbel->cq_inuse, cqn_offset );
746
747 ib_cq_set_drvdata ( cq, NULL );
748 }
749
750 /***************************************************************************
751 *
752 * Queue pair operations
753 *
754 ***************************************************************************
755 */
756
757 /**
758 * Assign queue pair number
759 *
760 * @v ibdev Infiniband device
761 * @v qp Queue pair
762 * @ret rc Return status code
763 */
arbel_alloc_qpn(struct ib_device * ibdev,struct ib_queue_pair * qp)764 static int arbel_alloc_qpn ( struct ib_device *ibdev,
765 struct ib_queue_pair *qp ) {
766 struct arbel *arbel = ib_get_drvdata ( ibdev );
767 unsigned int port_offset;
768 int qpn_offset;
769
770 /* Calculate queue pair number */
771 port_offset = ( ibdev->port - ARBEL_PORT_BASE );
772
773 switch ( qp->type ) {
774 case IB_QPT_SMI:
775 qp->qpn = ( arbel->special_qpn_base + port_offset );
776 return 0;
777 case IB_QPT_GSI:
778 qp->qpn = ( arbel->special_qpn_base + 2 + port_offset );
779 return 0;
780 case IB_QPT_UD:
781 case IB_QPT_RC:
782 /* Find a free queue pair number */
783 qpn_offset = arbel_bitmask_alloc ( arbel->qp_inuse,
784 ARBEL_MAX_QPS );
785 if ( qpn_offset < 0 ) {
786 DBGC ( arbel, "Arbel %p out of queue pairs\n",
787 arbel );
788 return qpn_offset;
789 }
790 qp->qpn = ( ( random() & ARBEL_QPN_RANDOM_MASK ) |
791 ( arbel->qpn_base + qpn_offset ) );
792 return 0;
793 default:
794 DBGC ( arbel, "Arbel %p unsupported QP type %d\n",
795 arbel, qp->type );
796 return -ENOTSUP;
797 }
798 }
799
800 /**
801 * Free queue pair number
802 *
803 * @v ibdev Infiniband device
804 * @v qp Queue pair
805 */
arbel_free_qpn(struct ib_device * ibdev,struct ib_queue_pair * qp)806 static void arbel_free_qpn ( struct ib_device *ibdev,
807 struct ib_queue_pair *qp ) {
808 struct arbel *arbel = ib_get_drvdata ( ibdev );
809 int qpn_offset;
810
811 qpn_offset = ( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) - arbel->qpn_base );
812 if ( qpn_offset >= 0 )
813 arbel_bitmask_free ( arbel->qp_inuse, qpn_offset );
814 }
815
816 /**
817 * Calculate transmission rate
818 *
819 * @v av Address vector
820 * @ret arbel_rate Arbel rate
821 */
arbel_rate(struct ib_address_vector * av)822 static unsigned int arbel_rate ( struct ib_address_vector *av ) {
823 return ( ( ( av->rate >= IB_RATE_2_5 ) && ( av->rate <= IB_RATE_120 ) )
824 ? ( av->rate + 5 ) : 0 );
825 }
826
827 /** Queue pair transport service type map */
828 static uint8_t arbel_qp_st[] = {
829 [IB_QPT_SMI] = ARBEL_ST_MLX,
830 [IB_QPT_GSI] = ARBEL_ST_MLX,
831 [IB_QPT_UD] = ARBEL_ST_UD,
832 [IB_QPT_RC] = ARBEL_ST_RC,
833 };
834
835 /**
836 * Dump queue pair context (for debugging only)
837 *
838 * @v arbel Arbel device
839 * @v qp Queue pair
840 * @ret rc Return status code
841 */
842 static __attribute__ (( unused )) int
arbel_dump_qpctx(struct arbel * arbel,struct ib_queue_pair * qp)843 arbel_dump_qpctx ( struct arbel *arbel, struct ib_queue_pair *qp ) {
844 struct arbelprm_qp_ee_state_transitions qpctx;
845 int rc;
846
847 memset ( &qpctx, 0, sizeof ( qpctx ) );
848 if ( ( rc = arbel_cmd_query_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ) {
849 DBGC ( arbel, "Arbel %p QPN %#lx QUERY_QPEE failed: %s\n",
850 arbel, qp->qpn, strerror ( rc ) );
851 return rc;
852 }
853 DBGC ( arbel, "Arbel %p QPN %#lx context:\n", arbel, qp->qpn );
854 DBGC_HDA ( arbel, 0, &qpctx.u.dwords[2], ( sizeof ( qpctx ) - 8 ) );
855
856 return 0;
857 }
858
859 /**
860 * Create send work queue
861 *
862 * @v arbel_send_wq Send work queue
863 * @v num_wqes Number of work queue entries
864 * @ret rc Return status code
865 */
arbel_create_send_wq(struct arbel_send_work_queue * arbel_send_wq,unsigned int num_wqes)866 static int arbel_create_send_wq ( struct arbel_send_work_queue *arbel_send_wq,
867 unsigned int num_wqes ) {
868 union arbel_send_wqe *wqe;
869 union arbel_send_wqe *next_wqe;
870 unsigned int wqe_idx_mask;
871 unsigned int i;
872
873 /* Allocate work queue */
874 arbel_send_wq->wqe_size = ( num_wqes *
875 sizeof ( arbel_send_wq->wqe[0] ) );
876 arbel_send_wq->wqe = malloc_dma ( arbel_send_wq->wqe_size,
877 sizeof ( arbel_send_wq->wqe[0] ) );
878 if ( ! arbel_send_wq->wqe )
879 return -ENOMEM;
880 memset ( arbel_send_wq->wqe, 0, arbel_send_wq->wqe_size );
881
882 /* Link work queue entries */
883 wqe_idx_mask = ( num_wqes - 1 );
884 for ( i = 0 ; i < num_wqes ; i++ ) {
885 wqe = &arbel_send_wq->wqe[i];
886 next_wqe = &arbel_send_wq->wqe[ ( i + 1 ) & wqe_idx_mask ];
887 MLX_FILL_1 ( &wqe->next, 0, nda_31_6,
888 ( virt_to_bus ( next_wqe ) >> 6 ) );
889 MLX_FILL_1 ( &wqe->next, 1, always1, 1 );
890 }
891
892 return 0;
893 }
894
895 /**
896 * Create receive work queue
897 *
898 * @v arbel_recv_wq Receive work queue
899 * @v num_wqes Number of work queue entries
900 * @v type Queue pair type
901 * @ret rc Return status code
902 */
arbel_create_recv_wq(struct arbel_recv_work_queue * arbel_recv_wq,unsigned int num_wqes,enum ib_queue_pair_type type)903 static int arbel_create_recv_wq ( struct arbel_recv_work_queue *arbel_recv_wq,
904 unsigned int num_wqes,
905 enum ib_queue_pair_type type ) {
906 struct arbelprm_recv_wqe *wqe;
907 struct arbelprm_recv_wqe *next_wqe;
908 unsigned int wqe_idx_mask;
909 size_t nds;
910 unsigned int i;
911 unsigned int j;
912 int rc;
913
914 /* Allocate work queue */
915 arbel_recv_wq->wqe_size = ( num_wqes *
916 sizeof ( arbel_recv_wq->wqe[0] ) );
917 arbel_recv_wq->wqe = malloc_dma ( arbel_recv_wq->wqe_size,
918 sizeof ( arbel_recv_wq->wqe[0] ) );
919 if ( ! arbel_recv_wq->wqe ) {
920 rc = -ENOMEM;
921 goto err_alloc_wqe;
922 }
923 memset ( arbel_recv_wq->wqe, 0, arbel_recv_wq->wqe_size );
924
925 /* Allocate GRH entries, if needed */
926 if ( ( type == IB_QPT_SMI ) || ( type == IB_QPT_GSI ) ||
927 ( type == IB_QPT_UD ) ) {
928 arbel_recv_wq->grh_size = ( num_wqes *
929 sizeof ( arbel_recv_wq->grh[0] ) );
930 arbel_recv_wq->grh = malloc_dma ( arbel_recv_wq->grh_size,
931 sizeof ( void * ) );
932 if ( ! arbel_recv_wq->grh ) {
933 rc = -ENOMEM;
934 goto err_alloc_grh;
935 }
936 }
937
938 /* Link work queue entries */
939 wqe_idx_mask = ( num_wqes - 1 );
940 nds = ( ( offsetof ( typeof ( *wqe ), data ) +
941 sizeof ( wqe->data[0] ) ) >> 4 );
942 for ( i = 0 ; i < num_wqes ; i++ ) {
943 wqe = &arbel_recv_wq->wqe[i].recv;
944 next_wqe = &arbel_recv_wq->wqe[( i + 1 ) & wqe_idx_mask].recv;
945 MLX_FILL_1 ( &wqe->next, 0, nda_31_6,
946 ( virt_to_bus ( next_wqe ) >> 6 ) );
947 MLX_FILL_1 ( &wqe->next, 1, nds, nds );
948 for ( j = 0 ; ( ( ( void * ) &wqe->data[j] ) <
949 ( ( void * ) ( wqe + 1 ) ) ) ; j++ ) {
950 MLX_FILL_1 ( &wqe->data[j], 1,
951 l_key, ARBEL_INVALID_LKEY );
952 }
953 }
954
955 return 0;
956
957 free_dma ( arbel_recv_wq->grh, arbel_recv_wq->grh_size );
958 err_alloc_grh:
959 free_dma ( arbel_recv_wq->wqe, arbel_recv_wq->wqe_size );
960 err_alloc_wqe:
961 return rc;
962 }
963
964 /**
965 * Create queue pair
966 *
967 * @v ibdev Infiniband device
968 * @v qp Queue pair
969 * @ret rc Return status code
970 */
arbel_create_qp(struct ib_device * ibdev,struct ib_queue_pair * qp)971 static int arbel_create_qp ( struct ib_device *ibdev,
972 struct ib_queue_pair *qp ) {
973 struct arbel *arbel = ib_get_drvdata ( ibdev );
974 struct arbel_queue_pair *arbel_qp;
975 struct arbelprm_qp_ee_state_transitions qpctx;
976 struct arbelprm_qp_db_record *send_db_rec;
977 struct arbelprm_qp_db_record *recv_db_rec;
978 physaddr_t send_wqe_base_adr;
979 physaddr_t recv_wqe_base_adr;
980 physaddr_t wqe_base_adr;
981 int rc;
982
983 /* Warn about dysfunctional code
984 *
985 * Arbel seems to crash the system as soon as the first send
986 * WQE completes on an RC queue pair. (NOPs complete
987 * successfully, so this is a problem specific to the work
988 * queue rather than the completion queue.) The cause of this
989 * problem has remained unknown for over a year. Patches to
990 * fix this are welcome.
991 */
992 if ( qp->type == IB_QPT_RC )
993 DBG ( "*** WARNING: Arbel RC support is non-functional ***\n" );
994
995 /* Calculate queue pair number */
996 if ( ( rc = arbel_alloc_qpn ( ibdev, qp ) ) != 0 )
997 goto err_alloc_qpn;
998
999 /* Allocate control structures */
1000 arbel_qp = zalloc ( sizeof ( *arbel_qp ) );
1001 if ( ! arbel_qp ) {
1002 rc = -ENOMEM;
1003 goto err_arbel_qp;
1004 }
1005 arbel_qp->send.doorbell_idx = arbel_send_doorbell_idx ( arbel, qp );
1006 arbel_qp->recv.doorbell_idx = arbel_recv_doorbell_idx ( arbel, qp );
1007
1008 /* Create send and receive work queues */
1009 if ( ( rc = arbel_create_send_wq ( &arbel_qp->send,
1010 qp->send.num_wqes ) ) != 0 )
1011 goto err_create_send_wq;
1012 if ( ( rc = arbel_create_recv_wq ( &arbel_qp->recv, qp->recv.num_wqes,
1013 qp->type ) ) != 0 )
1014 goto err_create_recv_wq;
1015
1016 /* Send and receive work queue entries must be within the same 4GB */
1017 send_wqe_base_adr = virt_to_bus ( arbel_qp->send.wqe );
1018 recv_wqe_base_adr = virt_to_bus ( arbel_qp->recv.wqe );
1019 if ( ( sizeof ( physaddr_t ) > sizeof ( uint32_t ) ) &&
1020 ( ( ( ( uint64_t ) send_wqe_base_adr ) >> 32 ) !=
1021 ( ( ( uint64_t ) recv_wqe_base_adr ) >> 32 ) ) ) {
1022 DBGC ( arbel, "Arbel %p QPN %#lx cannot support send %08lx "
1023 "recv %08lx\n", arbel, qp->qpn,
1024 send_wqe_base_adr, recv_wqe_base_adr );
1025 rc = -ENOTSUP;
1026 goto err_unsupported_address_split;
1027 }
1028 wqe_base_adr = send_wqe_base_adr;
1029
1030 /* Initialise doorbell records */
1031 send_db_rec = &arbel->db_rec[arbel_qp->send.doorbell_idx].qp;
1032 MLX_FILL_1 ( send_db_rec, 0, counter, 0 );
1033 MLX_FILL_2 ( send_db_rec, 1,
1034 res, ARBEL_UAR_RES_SQ,
1035 qp_number, qp->qpn );
1036 recv_db_rec = &arbel->db_rec[arbel_qp->recv.doorbell_idx].qp;
1037 MLX_FILL_1 ( recv_db_rec, 0, counter, 0 );
1038 MLX_FILL_2 ( recv_db_rec, 1,
1039 res, ARBEL_UAR_RES_RQ,
1040 qp_number, qp->qpn );
1041
1042 /* Transition queue to INIT state */
1043 memset ( &qpctx, 0, sizeof ( qpctx ) );
1044 MLX_FILL_3 ( &qpctx, 2,
1045 qpc_eec_data.de, 1,
1046 qpc_eec_data.pm_state, ARBEL_PM_STATE_MIGRATED,
1047 qpc_eec_data.st, arbel_qp_st[qp->type] );
1048 MLX_FILL_4 ( &qpctx, 4,
1049 qpc_eec_data.log_rq_size, fls ( qp->recv.num_wqes - 1 ),
1050 qpc_eec_data.log_rq_stride,
1051 ( fls ( sizeof ( arbel_qp->recv.wqe[0] ) - 1 ) - 4 ),
1052 qpc_eec_data.log_sq_size, fls ( qp->send.num_wqes - 1 ),
1053 qpc_eec_data.log_sq_stride,
1054 ( fls ( sizeof ( arbel_qp->send.wqe[0] ) - 1 ) - 4 ) );
1055 MLX_FILL_1 ( &qpctx, 5,
1056 qpc_eec_data.usr_page, arbel->limits.reserved_uars );
1057 MLX_FILL_1 ( &qpctx, 10, qpc_eec_data.primary_address_path.port_number,
1058 ibdev->port );
1059 MLX_FILL_1 ( &qpctx, 27, qpc_eec_data.pd, ARBEL_GLOBAL_PD );
1060 MLX_FILL_H ( &qpctx, 28, qpc_eec_data.wqe_base_adr_h, wqe_base_adr );
1061 MLX_FILL_1 ( &qpctx, 29, qpc_eec_data.wqe_lkey, arbel->lkey );
1062 MLX_FILL_1 ( &qpctx, 30, qpc_eec_data.ssc, 1 );
1063 MLX_FILL_1 ( &qpctx, 33, qpc_eec_data.cqn_snd, qp->send.cq->cqn );
1064 MLX_FILL_1 ( &qpctx, 34, qpc_eec_data.snd_wqe_base_adr_l,
1065 ( send_wqe_base_adr >> 6 ) );
1066 MLX_FILL_1 ( &qpctx, 35, qpc_eec_data.snd_db_record_index,
1067 arbel_qp->send.doorbell_idx );
1068 MLX_FILL_4 ( &qpctx, 38,
1069 qpc_eec_data.rre, 1,
1070 qpc_eec_data.rwe, 1,
1071 qpc_eec_data.rae, 1,
1072 qpc_eec_data.rsc, 1 );
1073 MLX_FILL_1 ( &qpctx, 41, qpc_eec_data.cqn_rcv, qp->recv.cq->cqn );
1074 MLX_FILL_1 ( &qpctx, 42, qpc_eec_data.rcv_wqe_base_adr_l,
1075 ( recv_wqe_base_adr >> 6 ) );
1076 MLX_FILL_1 ( &qpctx, 43, qpc_eec_data.rcv_db_record_index,
1077 arbel_qp->recv.doorbell_idx );
1078 if ( ( rc = arbel_cmd_rst2init_qpee ( arbel, qp->qpn, &qpctx )) != 0 ){
1079 DBGC ( arbel, "Arbel %p QPN %#lx RST2INIT_QPEE failed: %s\n",
1080 arbel, qp->qpn, strerror ( rc ) );
1081 goto err_rst2init_qpee;
1082 }
1083 arbel_qp->state = ARBEL_QP_ST_INIT;
1084
1085 DBGC ( arbel, "Arbel %p QPN %#lx send ring [%08lx,%08lx), doorbell "
1086 "%08lx\n", arbel, qp->qpn, virt_to_phys ( arbel_qp->send.wqe ),
1087 ( virt_to_phys ( arbel_qp->send.wqe ) +
1088 arbel_qp->send.wqe_size ),
1089 virt_to_phys ( send_db_rec ) );
1090 DBGC ( arbel, "Arbel %p QPN %#lx receive ring [%08lx,%08lx), doorbell "
1091 "%08lx\n", arbel, qp->qpn, virt_to_phys ( arbel_qp->recv.wqe ),
1092 ( virt_to_phys ( arbel_qp->recv.wqe ) +
1093 arbel_qp->recv.wqe_size ),
1094 virt_to_phys ( recv_db_rec ) );
1095 DBGC ( arbel, "Arbel %p QPN %#lx send CQN %#lx receive CQN %#lx\n",
1096 arbel, qp->qpn, qp->send.cq->cqn, qp->recv.cq->cqn );
1097 ib_qp_set_drvdata ( qp, arbel_qp );
1098 return 0;
1099
1100 arbel_cmd_2rst_qpee ( arbel, qp->qpn );
1101 err_rst2init_qpee:
1102 MLX_FILL_1 ( send_db_rec, 1, res, ARBEL_UAR_RES_NONE );
1103 MLX_FILL_1 ( recv_db_rec, 1, res, ARBEL_UAR_RES_NONE );
1104 err_unsupported_address_split:
1105 free_dma ( arbel_qp->recv.grh, arbel_qp->recv.grh_size );
1106 free_dma ( arbel_qp->recv.wqe, arbel_qp->recv.wqe_size );
1107 err_create_recv_wq:
1108 free_dma ( arbel_qp->send.wqe, arbel_qp->send.wqe_size );
1109 err_create_send_wq:
1110 free ( arbel_qp );
1111 err_arbel_qp:
1112 arbel_free_qpn ( ibdev, qp );
1113 err_alloc_qpn:
1114 return rc;
1115 }
1116
1117 /**
1118 * Modify queue pair
1119 *
1120 * @v ibdev Infiniband device
1121 * @v qp Queue pair
1122 * @ret rc Return status code
1123 */
arbel_modify_qp(struct ib_device * ibdev,struct ib_queue_pair * qp)1124 static int arbel_modify_qp ( struct ib_device *ibdev,
1125 struct ib_queue_pair *qp ) {
1126 struct arbel *arbel = ib_get_drvdata ( ibdev );
1127 struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp );
1128 struct arbelprm_qp_ee_state_transitions qpctx;
1129 int rc;
1130
1131 /* Transition queue to RTR state, if applicable */
1132 if ( arbel_qp->state < ARBEL_QP_ST_RTR ) {
1133 memset ( &qpctx, 0, sizeof ( qpctx ) );
1134 MLX_FILL_2 ( &qpctx, 4,
1135 qpc_eec_data.mtu, ARBEL_MTU_2048,
1136 qpc_eec_data.msg_max, 31 );
1137 MLX_FILL_1 ( &qpctx, 7,
1138 qpc_eec_data.remote_qpn_een, qp->av.qpn );
1139 MLX_FILL_2 ( &qpctx, 11,
1140 qpc_eec_data.primary_address_path.rnr_retry,
1141 ARBEL_RETRY_MAX,
1142 qpc_eec_data.primary_address_path.rlid,
1143 qp->av.lid );
1144 MLX_FILL_2 ( &qpctx, 12,
1145 qpc_eec_data.primary_address_path.ack_timeout,
1146 14 /* 4.096us * 2^(14) = 67ms */,
1147 qpc_eec_data.primary_address_path.max_stat_rate,
1148 arbel_rate ( &qp->av ) );
1149 memcpy ( &qpctx.u.dwords[14], &qp->av.gid,
1150 sizeof ( qp->av.gid ) );
1151 MLX_FILL_1 ( &qpctx, 30,
1152 qpc_eec_data.retry_count, ARBEL_RETRY_MAX );
1153 MLX_FILL_1 ( &qpctx, 39,
1154 qpc_eec_data.next_rcv_psn, qp->recv.psn );
1155 MLX_FILL_1 ( &qpctx, 40,
1156 qpc_eec_data.ra_buff_indx,
1157 ( arbel->limits.reserved_rdbs +
1158 ( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) -
1159 arbel->special_qpn_base ) ) );
1160 if ( ( rc = arbel_cmd_init2rtr_qpee ( arbel, qp->qpn,
1161 &qpctx ) ) != 0 ) {
1162 DBGC ( arbel, "Arbel %p QPN %#lx INIT2RTR_QPEE failed:"
1163 " %s\n", arbel, qp->qpn, strerror ( rc ) );
1164 return rc;
1165 }
1166 arbel_qp->state = ARBEL_QP_ST_RTR;
1167 }
1168
1169 /* Transition queue to RTS state, if applicable */
1170 if ( arbel_qp->state < ARBEL_QP_ST_RTS ) {
1171 memset ( &qpctx, 0, sizeof ( qpctx ) );
1172 MLX_FILL_1 ( &qpctx, 11,
1173 qpc_eec_data.primary_address_path.rnr_retry,
1174 ARBEL_RETRY_MAX );
1175 MLX_FILL_1 ( &qpctx, 12,
1176 qpc_eec_data.primary_address_path.ack_timeout,
1177 14 /* 4.096us * 2^(14) = 67ms */ );
1178 MLX_FILL_2 ( &qpctx, 30,
1179 qpc_eec_data.retry_count, ARBEL_RETRY_MAX,
1180 qpc_eec_data.sic, 1 );
1181 MLX_FILL_1 ( &qpctx, 32,
1182 qpc_eec_data.next_send_psn, qp->send.psn );
1183 if ( ( rc = arbel_cmd_rtr2rts_qpee ( arbel, qp->qpn,
1184 &qpctx ) ) != 0 ) {
1185 DBGC ( arbel, "Arbel %p QPN %#lx RTR2RTS_QPEE failed: "
1186 "%s\n", arbel, qp->qpn, strerror ( rc ) );
1187 return rc;
1188 }
1189 arbel_qp->state = ARBEL_QP_ST_RTS;
1190 }
1191
1192 /* Update parameters in RTS state */
1193 memset ( &qpctx, 0, sizeof ( qpctx ) );
1194 MLX_FILL_1 ( &qpctx, 0, opt_param_mask, ARBEL_QPEE_OPT_PARAM_QKEY );
1195 MLX_FILL_1 ( &qpctx, 44, qpc_eec_data.q_key, qp->qkey );
1196 if ( ( rc = arbel_cmd_rts2rts_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ){
1197 DBGC ( arbel, "Arbel %p QPN %#lx RTS2RTS_QPEE failed: %s\n",
1198 arbel, qp->qpn, strerror ( rc ) );
1199 return rc;
1200 }
1201
1202 return 0;
1203 }
1204
1205 /**
1206 * Destroy queue pair
1207 *
1208 * @v ibdev Infiniband device
1209 * @v qp Queue pair
1210 */
arbel_destroy_qp(struct ib_device * ibdev,struct ib_queue_pair * qp)1211 static void arbel_destroy_qp ( struct ib_device *ibdev,
1212 struct ib_queue_pair *qp ) {
1213 struct arbel *arbel = ib_get_drvdata ( ibdev );
1214 struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp );
1215 struct arbelprm_qp_db_record *send_db_rec;
1216 struct arbelprm_qp_db_record *recv_db_rec;
1217 int rc;
1218
1219 /* Take ownership back from hardware */
1220 if ( ( rc = arbel_cmd_2rst_qpee ( arbel, qp->qpn ) ) != 0 ) {
1221 DBGC ( arbel, "Arbel %p QPN %#lx FATAL 2RST_QPEE failed: "
1222 "%s\n", arbel, qp->qpn, strerror ( rc ) );
1223 /* Leak memory and return; at least we avoid corruption */
1224 return;
1225 }
1226
1227 /* Clear doorbell records */
1228 send_db_rec = &arbel->db_rec[arbel_qp->send.doorbell_idx].qp;
1229 recv_db_rec = &arbel->db_rec[arbel_qp->recv.doorbell_idx].qp;
1230 MLX_FILL_1 ( send_db_rec, 1, res, ARBEL_UAR_RES_NONE );
1231 MLX_FILL_1 ( recv_db_rec, 1, res, ARBEL_UAR_RES_NONE );
1232
1233 /* Free memory */
1234 free_dma ( arbel_qp->recv.grh, arbel_qp->recv.grh_size );
1235 free_dma ( arbel_qp->recv.wqe, arbel_qp->recv.wqe_size );
1236 free_dma ( arbel_qp->send.wqe, arbel_qp->send.wqe_size );
1237 free ( arbel_qp );
1238
1239 /* Mark queue number as free */
1240 arbel_free_qpn ( ibdev, qp );
1241
1242 ib_qp_set_drvdata ( qp, NULL );
1243 }
1244
1245 /***************************************************************************
1246 *
1247 * Work request operations
1248 *
1249 ***************************************************************************
1250 */
1251
1252 /**
1253 * Ring doorbell register in UAR
1254 *
1255 * @v arbel Arbel device
1256 * @v db_reg Doorbell register structure
1257 * @v offset Address of doorbell
1258 */
arbel_ring_doorbell(struct arbel * arbel,union arbelprm_doorbell_register * db_reg,unsigned int offset)1259 static void arbel_ring_doorbell ( struct arbel *arbel,
1260 union arbelprm_doorbell_register *db_reg,
1261 unsigned int offset ) {
1262
1263 DBGC2 ( arbel, "Arbel %p ringing doorbell %08x:%08x at %lx\n",
1264 arbel, ntohl ( db_reg->dword[0] ), ntohl ( db_reg->dword[1] ),
1265 virt_to_phys ( arbel->uar + offset ) );
1266
1267 barrier();
1268 writel ( db_reg->dword[0], ( arbel->uar + offset + 0 ) );
1269 barrier();
1270 writel ( db_reg->dword[1], ( arbel->uar + offset + 4 ) );
1271 }
1272
1273 /** GID used for GID-less send work queue entries */
1274 static const union ib_gid arbel_no_gid = {
1275 .bytes = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 },
1276 };
1277
1278 /**
1279 * Construct UD send work queue entry
1280 *
1281 * @v ibdev Infiniband device
1282 * @v qp Queue pair
1283 * @v dest Destination address vector
1284 * @v iobuf I/O buffer
1285 * @v wqe Send work queue entry
1286 * @ret nds Work queue entry size
1287 */
arbel_fill_ud_send_wqe(struct ib_device * ibdev,struct ib_queue_pair * qp __unused,struct ib_address_vector * dest,struct io_buffer * iobuf,union arbel_send_wqe * wqe)1288 static size_t arbel_fill_ud_send_wqe ( struct ib_device *ibdev,
1289 struct ib_queue_pair *qp __unused,
1290 struct ib_address_vector *dest,
1291 struct io_buffer *iobuf,
1292 union arbel_send_wqe *wqe ) {
1293 struct arbel *arbel = ib_get_drvdata ( ibdev );
1294 const union ib_gid *gid;
1295
1296 /* Construct this work queue entry */
1297 MLX_FILL_1 ( &wqe->ud.ctrl, 0, always1, 1 );
1298 MLX_FILL_2 ( &wqe->ud.ud, 0,
1299 ud_address_vector.pd, ARBEL_GLOBAL_PD,
1300 ud_address_vector.port_number, ibdev->port );
1301 MLX_FILL_2 ( &wqe->ud.ud, 1,
1302 ud_address_vector.rlid, dest->lid,
1303 ud_address_vector.g, dest->gid_present );
1304 MLX_FILL_2 ( &wqe->ud.ud, 2,
1305 ud_address_vector.max_stat_rate, arbel_rate ( dest ),
1306 ud_address_vector.msg, 3 );
1307 MLX_FILL_1 ( &wqe->ud.ud, 3, ud_address_vector.sl, dest->sl );
1308 gid = ( dest->gid_present ? &dest->gid : &arbel_no_gid );
1309 memcpy ( &wqe->ud.ud.u.dwords[4], gid, sizeof ( *gid ) );
1310 MLX_FILL_1 ( &wqe->ud.ud, 8, destination_qp, dest->qpn );
1311 MLX_FILL_1 ( &wqe->ud.ud, 9, q_key, dest->qkey );
1312 MLX_FILL_1 ( &wqe->ud.data[0], 0, byte_count, iob_len ( iobuf ) );
1313 MLX_FILL_1 ( &wqe->ud.data[0], 1, l_key, arbel->lkey );
1314 MLX_FILL_H ( &wqe->ud.data[0], 2,
1315 local_address_h, virt_to_bus ( iobuf->data ) );
1316 MLX_FILL_1 ( &wqe->ud.data[0], 3,
1317 local_address_l, virt_to_bus ( iobuf->data ) );
1318
1319 return ( offsetof ( typeof ( wqe->ud ), data[1] ) >> 4 );
1320 }
1321
1322 /**
1323 * Construct MLX send work queue entry
1324 *
1325 * @v ibdev Infiniband device
1326 * @v qp Queue pair
1327 * @v dest Destination address vector
1328 * @v iobuf I/O buffer
1329 * @v wqe Send work queue entry
1330 * @ret nds Work queue entry size
1331 */
arbel_fill_mlx_send_wqe(struct ib_device * ibdev,struct ib_queue_pair * qp,struct ib_address_vector * dest,struct io_buffer * iobuf,union arbel_send_wqe * wqe)1332 static size_t arbel_fill_mlx_send_wqe ( struct ib_device *ibdev,
1333 struct ib_queue_pair *qp,
1334 struct ib_address_vector *dest,
1335 struct io_buffer *iobuf,
1336 union arbel_send_wqe *wqe ) {
1337 struct arbel *arbel = ib_get_drvdata ( ibdev );
1338 struct io_buffer headers;
1339
1340 /* Construct IB headers */
1341 iob_populate ( &headers, &wqe->mlx.headers, 0,
1342 sizeof ( wqe->mlx.headers ) );
1343 iob_reserve ( &headers, sizeof ( wqe->mlx.headers ) );
1344 ib_push ( ibdev, &headers, qp, iob_len ( iobuf ), dest );
1345
1346 /* Construct this work queue entry */
1347 MLX_FILL_5 ( &wqe->mlx.ctrl, 0,
1348 c, 1 /* generate completion */,
1349 icrc, 0 /* generate ICRC */,
1350 max_statrate, arbel_rate ( dest ),
1351 slr, 0,
1352 v15, ( ( qp->ext_qpn == IB_QPN_SMI ) ? 1 : 0 ) );
1353 MLX_FILL_1 ( &wqe->mlx.ctrl, 1, rlid, dest->lid );
1354 MLX_FILL_1 ( &wqe->mlx.data[0], 0,
1355 byte_count, iob_len ( &headers ) );
1356 MLX_FILL_1 ( &wqe->mlx.data[0], 1, l_key, arbel->lkey );
1357 MLX_FILL_H ( &wqe->mlx.data[0], 2,
1358 local_address_h, virt_to_bus ( headers.data ) );
1359 MLX_FILL_1 ( &wqe->mlx.data[0], 3,
1360 local_address_l, virt_to_bus ( headers.data ) );
1361 MLX_FILL_1 ( &wqe->mlx.data[1], 0,
1362 byte_count, ( iob_len ( iobuf ) + 4 /* ICRC */ ) );
1363 MLX_FILL_1 ( &wqe->mlx.data[1], 1, l_key, arbel->lkey );
1364 MLX_FILL_H ( &wqe->mlx.data[1], 2,
1365 local_address_h, virt_to_bus ( iobuf->data ) );
1366 MLX_FILL_1 ( &wqe->mlx.data[1], 3,
1367 local_address_l, virt_to_bus ( iobuf->data ) );
1368
1369 return ( offsetof ( typeof ( wqe->mlx ), data[2] ) >> 4 );
1370 }
1371
1372 /**
1373 * Construct RC send work queue entry
1374 *
1375 * @v ibdev Infiniband device
1376 * @v qp Queue pair
1377 * @v dest Destination address vector
1378 * @v iobuf I/O buffer
1379 * @v wqe Send work queue entry
1380 * @ret nds Work queue entry size
1381 */
arbel_fill_rc_send_wqe(struct ib_device * ibdev,struct ib_queue_pair * qp __unused,struct ib_address_vector * dest __unused,struct io_buffer * iobuf,union arbel_send_wqe * wqe)1382 static size_t arbel_fill_rc_send_wqe ( struct ib_device *ibdev,
1383 struct ib_queue_pair *qp __unused,
1384 struct ib_address_vector *dest __unused,
1385 struct io_buffer *iobuf,
1386 union arbel_send_wqe *wqe ) {
1387 struct arbel *arbel = ib_get_drvdata ( ibdev );
1388
1389 /* Construct this work queue entry */
1390 MLX_FILL_1 ( &wqe->rc.ctrl, 0, always1, 1 );
1391 MLX_FILL_1 ( &wqe->rc.data[0], 0, byte_count, iob_len ( iobuf ) );
1392 MLX_FILL_1 ( &wqe->rc.data[0], 1, l_key, arbel->lkey );
1393 MLX_FILL_H ( &wqe->rc.data[0], 2,
1394 local_address_h, virt_to_bus ( iobuf->data ) );
1395 MLX_FILL_1 ( &wqe->rc.data[0], 3,
1396 local_address_l, virt_to_bus ( iobuf->data ) );
1397
1398 return ( offsetof ( typeof ( wqe->rc ), data[1] ) >> 4 );
1399 }
1400
1401 /** Work queue entry constructors */
1402 static size_t
1403 ( * arbel_fill_send_wqe[] ) ( struct ib_device *ibdev,
1404 struct ib_queue_pair *qp,
1405 struct ib_address_vector *dest,
1406 struct io_buffer *iobuf,
1407 union arbel_send_wqe *wqe ) = {
1408 [IB_QPT_SMI] = arbel_fill_mlx_send_wqe,
1409 [IB_QPT_GSI] = arbel_fill_mlx_send_wqe,
1410 [IB_QPT_UD] = arbel_fill_ud_send_wqe,
1411 [IB_QPT_RC] = arbel_fill_rc_send_wqe,
1412 };
1413
1414 /**
1415 * Post send work queue entry
1416 *
1417 * @v ibdev Infiniband device
1418 * @v qp Queue pair
1419 * @v dest Destination address vector
1420 * @v iobuf I/O buffer
1421 * @ret rc Return status code
1422 */
arbel_post_send(struct ib_device * ibdev,struct ib_queue_pair * qp,struct ib_address_vector * dest,struct io_buffer * iobuf)1423 static int arbel_post_send ( struct ib_device *ibdev,
1424 struct ib_queue_pair *qp,
1425 struct ib_address_vector *dest,
1426 struct io_buffer *iobuf ) {
1427 struct arbel *arbel = ib_get_drvdata ( ibdev );
1428 struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp );
1429 struct ib_work_queue *wq = &qp->send;
1430 struct arbel_send_work_queue *arbel_send_wq = &arbel_qp->send;
1431 union arbel_send_wqe *prev_wqe;
1432 union arbel_send_wqe *wqe;
1433 struct arbelprm_qp_db_record *qp_db_rec;
1434 union arbelprm_doorbell_register db_reg;
1435 unsigned long wqe_idx_mask;
1436 size_t nds;
1437
1438 /* Allocate work queue entry */
1439 wqe_idx_mask = ( wq->num_wqes - 1 );
1440 if ( wq->iobufs[wq->next_idx & wqe_idx_mask] ) {
1441 DBGC ( arbel, "Arbel %p QPN %#lx send queue full",
1442 arbel, qp->qpn );
1443 return -ENOBUFS;
1444 }
1445 wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf;
1446 prev_wqe = &arbel_send_wq->wqe[(wq->next_idx - 1) & wqe_idx_mask];
1447 wqe = &arbel_send_wq->wqe[wq->next_idx & wqe_idx_mask];
1448
1449 /* Construct work queue entry */
1450 memset ( ( ( ( void * ) wqe ) + sizeof ( wqe->next ) ), 0,
1451 ( sizeof ( *wqe ) - sizeof ( wqe->next ) ) );
1452 assert ( qp->type < ( sizeof ( arbel_fill_send_wqe ) /
1453 sizeof ( arbel_fill_send_wqe[0] ) ) );
1454 assert ( arbel_fill_send_wqe[qp->type] != NULL );
1455 nds = arbel_fill_send_wqe[qp->type] ( ibdev, qp, dest, iobuf, wqe );
1456 DBGCP ( arbel, "Arbel %p QPN %#lx posting send WQE %#lx:\n",
1457 arbel, qp->qpn, ( wq->next_idx & wqe_idx_mask ) );
1458 DBGCP_HDA ( arbel, virt_to_phys ( wqe ), wqe, sizeof ( *wqe ) );
1459
1460 /* Update previous work queue entry's "next" field */
1461 MLX_SET ( &prev_wqe->next, nopcode, ARBEL_OPCODE_SEND );
1462 MLX_FILL_3 ( &prev_wqe->next, 1,
1463 nds, nds,
1464 f, 0,
1465 always1, 1 );
1466
1467 /* Update doorbell record */
1468 barrier();
1469 qp_db_rec = &arbel->db_rec[arbel_send_wq->doorbell_idx].qp;
1470 MLX_FILL_1 ( qp_db_rec, 0,
1471 counter, ( ( wq->next_idx + 1 ) & 0xffff ) );
1472
1473 /* Ring doorbell register */
1474 MLX_FILL_4 ( &db_reg.send, 0,
1475 nopcode, ARBEL_OPCODE_SEND,
1476 f, 0,
1477 wqe_counter, ( wq->next_idx & 0xffff ),
1478 wqe_cnt, 1 );
1479 MLX_FILL_2 ( &db_reg.send, 1,
1480 nds, nds,
1481 qpn, qp->qpn );
1482 arbel_ring_doorbell ( arbel, &db_reg, ARBEL_DB_POST_SND_OFFSET );
1483
1484 /* Update work queue's index */
1485 wq->next_idx++;
1486
1487 return 0;
1488 }
1489
1490 /**
1491 * Post receive work queue entry
1492 *
1493 * @v ibdev Infiniband device
1494 * @v qp Queue pair
1495 * @v iobuf I/O buffer
1496 * @ret rc Return status code
1497 */
arbel_post_recv(struct ib_device * ibdev,struct ib_queue_pair * qp,struct io_buffer * iobuf)1498 static int arbel_post_recv ( struct ib_device *ibdev,
1499 struct ib_queue_pair *qp,
1500 struct io_buffer *iobuf ) {
1501 struct arbel *arbel = ib_get_drvdata ( ibdev );
1502 struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp );
1503 struct ib_work_queue *wq = &qp->recv;
1504 struct arbel_recv_work_queue *arbel_recv_wq = &arbel_qp->recv;
1505 struct arbelprm_recv_wqe *wqe;
1506 struct arbelprm_wqe_segment_data_ptr *data;
1507 struct ib_global_route_header *grh;
1508 union arbelprm_doorbell_record *db_rec;
1509 unsigned int wqe_idx_mask;
1510
1511 /* Allocate work queue entry */
1512 wqe_idx_mask = ( wq->num_wqes - 1 );
1513 if ( wq->iobufs[wq->next_idx & wqe_idx_mask] ) {
1514 DBGC ( arbel, "Arbel %p QPN %#lx receive queue full\n",
1515 arbel, qp->qpn );
1516 return -ENOBUFS;
1517 }
1518 wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf;
1519 wqe = &arbel_recv_wq->wqe[wq->next_idx & wqe_idx_mask].recv;
1520
1521 /* Construct work queue entry */
1522 data = &wqe->data[0];
1523 if ( arbel_recv_wq->grh ) {
1524 grh = &arbel_recv_wq->grh[wq->next_idx & wqe_idx_mask];
1525 MLX_FILL_1 ( data, 0, byte_count, sizeof ( *grh ) );
1526 MLX_FILL_1 ( data, 1, l_key, arbel->lkey );
1527 MLX_FILL_H ( data, 2, local_address_h, virt_to_bus ( grh ) );
1528 MLX_FILL_1 ( data, 3, local_address_l, virt_to_bus ( grh ) );
1529 data++;
1530 }
1531 MLX_FILL_1 ( data, 0, byte_count, iob_tailroom ( iobuf ) );
1532 MLX_FILL_1 ( data, 1, l_key, arbel->lkey );
1533 MLX_FILL_H ( data, 2, local_address_h, virt_to_bus ( iobuf->data ) );
1534 MLX_FILL_1 ( data, 3, local_address_l, virt_to_bus ( iobuf->data ) );
1535
1536 /* Update doorbell record */
1537 barrier();
1538 db_rec = &arbel->db_rec[arbel_recv_wq->doorbell_idx];
1539 MLX_FILL_1 ( &db_rec->qp, 0,
1540 counter, ( ( wq->next_idx + 1 ) & 0xffff ) );
1541
1542 /* Update work queue's index */
1543 wq->next_idx++;
1544
1545 return 0;
1546 }
1547
1548 /**
1549 * Handle completion
1550 *
1551 * @v ibdev Infiniband device
1552 * @v cq Completion queue
1553 * @v cqe Hardware completion queue entry
1554 * @ret rc Return status code
1555 */
arbel_complete(struct ib_device * ibdev,struct ib_completion_queue * cq,union arbelprm_completion_entry * cqe)1556 static int arbel_complete ( struct ib_device *ibdev,
1557 struct ib_completion_queue *cq,
1558 union arbelprm_completion_entry *cqe ) {
1559 struct arbel *arbel = ib_get_drvdata ( ibdev );
1560 struct ib_work_queue *wq;
1561 struct ib_queue_pair *qp;
1562 struct arbel_queue_pair *arbel_qp;
1563 struct arbel_send_work_queue *arbel_send_wq;
1564 struct arbel_recv_work_queue *arbel_recv_wq;
1565 struct arbelprm_recv_wqe *recv_wqe;
1566 struct io_buffer *iobuf;
1567 struct ib_address_vector recv_dest;
1568 struct ib_address_vector recv_source;
1569 struct ib_global_route_header *grh;
1570 struct ib_address_vector *source;
1571 unsigned int opcode;
1572 unsigned long qpn;
1573 int is_send;
1574 unsigned long wqe_adr;
1575 unsigned long wqe_idx;
1576 size_t len;
1577 int rc = 0;
1578
1579 /* Parse completion */
1580 qpn = MLX_GET ( &cqe->normal, my_qpn );
1581 is_send = MLX_GET ( &cqe->normal, s );
1582 wqe_adr = ( MLX_GET ( &cqe->normal, wqe_adr ) << 6 );
1583 opcode = MLX_GET ( &cqe->normal, opcode );
1584 if ( opcode >= ARBEL_OPCODE_RECV_ERROR ) {
1585 /* "s" field is not valid for error opcodes */
1586 is_send = ( opcode == ARBEL_OPCODE_SEND_ERROR );
1587 DBGC ( arbel, "Arbel %p CQN %#lx %s QPN %#lx syndrome %#x "
1588 "vendor %#x\n", arbel, cq->cqn,
1589 ( is_send ? "send" : "recv" ), qpn,
1590 MLX_GET ( &cqe->error, syndrome ),
1591 MLX_GET ( &cqe->error, vendor_code ) );
1592 DBGC_HDA ( arbel, virt_to_phys ( cqe ), cqe, sizeof ( *cqe ) );
1593 rc = -EIO;
1594 /* Don't return immediately; propagate error to completer */
1595 }
1596
1597 /* Identify work queue */
1598 wq = ib_find_wq ( cq, qpn, is_send );
1599 if ( ! wq ) {
1600 DBGC ( arbel, "Arbel %p CQN %#lx unknown %s QPN %#lx\n",
1601 arbel, cq->cqn, ( is_send ? "send" : "recv" ), qpn );
1602 return -EIO;
1603 }
1604 qp = wq->qp;
1605 arbel_qp = ib_qp_get_drvdata ( qp );
1606 arbel_send_wq = &arbel_qp->send;
1607 arbel_recv_wq = &arbel_qp->recv;
1608
1609 /* Identify work queue entry index */
1610 if ( is_send ) {
1611 wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_send_wq->wqe ) ) /
1612 sizeof ( arbel_send_wq->wqe[0] ) );
1613 assert ( wqe_idx < qp->send.num_wqes );
1614 } else {
1615 wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_recv_wq->wqe ) ) /
1616 sizeof ( arbel_recv_wq->wqe[0] ) );
1617 assert ( wqe_idx < qp->recv.num_wqes );
1618 }
1619
1620 DBGCP ( arbel, "Arbel %p CQN %#lx QPN %#lx %s WQE %#lx completed:\n",
1621 arbel, cq->cqn, qp->qpn, ( is_send ? "send" : "recv" ),
1622 wqe_idx );
1623 DBGCP_HDA ( arbel, virt_to_phys ( cqe ), cqe, sizeof ( *cqe ) );
1624
1625 /* Identify I/O buffer */
1626 iobuf = wq->iobufs[wqe_idx];
1627 if ( ! iobuf ) {
1628 DBGC ( arbel, "Arbel %p CQN %#lx QPN %#lx empty %s WQE %#lx\n",
1629 arbel, cq->cqn, qp->qpn, ( is_send ? "send" : "recv" ),
1630 wqe_idx );
1631 return -EIO;
1632 }
1633 wq->iobufs[wqe_idx] = NULL;
1634
1635 if ( is_send ) {
1636 /* Hand off to completion handler */
1637 ib_complete_send ( ibdev, qp, iobuf, rc );
1638 } else {
1639 /* Set received length */
1640 len = MLX_GET ( &cqe->normal, byte_cnt );
1641 recv_wqe = &arbel_recv_wq->wqe[wqe_idx].recv;
1642 assert ( MLX_GET ( &recv_wqe->data[0], local_address_l ) ==
1643 virt_to_bus ( iobuf->data ) );
1644 assert ( MLX_GET ( &recv_wqe->data[0], byte_count ) ==
1645 iob_tailroom ( iobuf ) );
1646 MLX_FILL_1 ( &recv_wqe->data[0], 0, byte_count, 0 );
1647 MLX_FILL_1 ( &recv_wqe->data[0], 1,
1648 l_key, ARBEL_INVALID_LKEY );
1649 memset ( &recv_dest, 0, sizeof ( recv_dest ) );
1650 recv_dest.qpn = qpn;
1651 switch ( qp->type ) {
1652 case IB_QPT_SMI:
1653 case IB_QPT_GSI:
1654 case IB_QPT_UD:
1655 /* Locate corresponding GRH */
1656 assert ( arbel_recv_wq->grh != NULL );
1657 grh = &arbel_recv_wq->grh[wqe_idx];
1658 len -= sizeof ( *grh );
1659 /* Construct address vector */
1660 source = &recv_source;
1661 memset ( source, 0, sizeof ( *source ) );
1662 source->qpn = MLX_GET ( &cqe->normal, rqpn );
1663 source->lid = MLX_GET ( &cqe->normal, rlid );
1664 source->sl = MLX_GET ( &cqe->normal, sl );
1665 recv_dest.gid_present = source->gid_present =
1666 MLX_GET ( &cqe->normal, g );
1667 memcpy ( &recv_dest.gid, &grh->dgid,
1668 sizeof ( recv_dest.gid ) );
1669 memcpy ( &source->gid, &grh->sgid,
1670 sizeof ( source->gid ) );
1671 break;
1672 case IB_QPT_RC:
1673 source = &qp->av;
1674 break;
1675 default:
1676 assert ( 0 );
1677 return -EINVAL;
1678 }
1679 assert ( len <= iob_tailroom ( iobuf ) );
1680 iob_put ( iobuf, len );
1681 /* Hand off to completion handler */
1682 ib_complete_recv ( ibdev, qp, &recv_dest, source, iobuf, rc );
1683 }
1684
1685 return rc;
1686 }
1687
1688 /**
1689 * Poll completion queue
1690 *
1691 * @v ibdev Infiniband device
1692 * @v cq Completion queue
1693 */
arbel_poll_cq(struct ib_device * ibdev,struct ib_completion_queue * cq)1694 static void arbel_poll_cq ( struct ib_device *ibdev,
1695 struct ib_completion_queue *cq ) {
1696 struct arbel *arbel = ib_get_drvdata ( ibdev );
1697 struct arbel_completion_queue *arbel_cq = ib_cq_get_drvdata ( cq );
1698 struct arbelprm_cq_ci_db_record *ci_db_rec;
1699 union arbelprm_completion_entry *cqe;
1700 unsigned int cqe_idx_mask;
1701 int rc;
1702
1703 while ( 1 ) {
1704 /* Look for completion entry */
1705 cqe_idx_mask = ( cq->num_cqes - 1 );
1706 cqe = &arbel_cq->cqe[cq->next_idx & cqe_idx_mask];
1707 if ( MLX_GET ( &cqe->normal, owner ) != 0 ) {
1708 /* Entry still owned by hardware; end of poll */
1709 break;
1710 }
1711
1712 /* Handle completion */
1713 if ( ( rc = arbel_complete ( ibdev, cq, cqe ) ) != 0 ) {
1714 DBGC ( arbel, "Arbel %p CQN %#lx failed to complete: "
1715 "%s\n", arbel, cq->cqn, strerror ( rc ) );
1716 DBGC_HD ( arbel, cqe, sizeof ( *cqe ) );
1717 }
1718
1719 /* Return ownership to hardware */
1720 MLX_FILL_1 ( &cqe->normal, 7, owner, 1 );
1721 barrier();
1722 /* Update completion queue's index */
1723 cq->next_idx++;
1724 /* Update doorbell record */
1725 ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci;
1726 MLX_FILL_1 ( ci_db_rec, 0,
1727 counter, ( cq->next_idx & 0xffffffffUL ) );
1728 }
1729 }
1730
1731 /***************************************************************************
1732 *
1733 * Event queues
1734 *
1735 ***************************************************************************
1736 */
1737
1738 /**
1739 * Create event queue
1740 *
1741 * @v arbel Arbel device
1742 * @ret rc Return status code
1743 */
arbel_create_eq(struct arbel * arbel)1744 static int arbel_create_eq ( struct arbel *arbel ) {
1745 struct arbel_event_queue *arbel_eq = &arbel->eq;
1746 struct arbelprm_eqc eqctx;
1747 struct arbelprm_event_mask mask;
1748 unsigned int i;
1749 int rc;
1750
1751 /* Select event queue number */
1752 arbel_eq->eqn = arbel->limits.reserved_eqs;
1753
1754 /* Calculate doorbell address */
1755 arbel_eq->doorbell = ( arbel->eq_ci_doorbells +
1756 ARBEL_DB_EQ_OFFSET ( arbel_eq->eqn ) );
1757
1758 /* Allocate event queue itself */
1759 arbel_eq->eqe_size =
1760 ( ARBEL_NUM_EQES * sizeof ( arbel_eq->eqe[0] ) );
1761 arbel_eq->eqe = malloc_dma ( arbel_eq->eqe_size,
1762 sizeof ( arbel_eq->eqe[0] ) );
1763 if ( ! arbel_eq->eqe ) {
1764 rc = -ENOMEM;
1765 goto err_eqe;
1766 }
1767 memset ( arbel_eq->eqe, 0, arbel_eq->eqe_size );
1768 for ( i = 0 ; i < ARBEL_NUM_EQES ; i++ ) {
1769 MLX_FILL_1 ( &arbel_eq->eqe[i].generic, 7, owner, 1 );
1770 }
1771 barrier();
1772
1773 /* Hand queue over to hardware */
1774 memset ( &eqctx, 0, sizeof ( eqctx ) );
1775 MLX_FILL_1 ( &eqctx, 0, st, 0xa /* "Fired" */ );
1776 MLX_FILL_H ( &eqctx, 1,
1777 start_address_h, virt_to_phys ( arbel_eq->eqe ) );
1778 MLX_FILL_1 ( &eqctx, 2,
1779 start_address_l, virt_to_phys ( arbel_eq->eqe ) );
1780 MLX_FILL_1 ( &eqctx, 3, log_eq_size, fls ( ARBEL_NUM_EQES - 1 ) );
1781 MLX_FILL_1 ( &eqctx, 6, pd, ARBEL_GLOBAL_PD );
1782 MLX_FILL_1 ( &eqctx, 7, lkey, arbel->lkey );
1783 if ( ( rc = arbel_cmd_sw2hw_eq ( arbel, arbel_eq->eqn,
1784 &eqctx ) ) != 0 ) {
1785 DBGC ( arbel, "Arbel %p EQN %#lx SW2HW_EQ failed: %s\n",
1786 arbel, arbel_eq->eqn, strerror ( rc ) );
1787 goto err_sw2hw_eq;
1788 }
1789
1790 /* Map events to this event queue */
1791 memset ( &mask, 0xff, sizeof ( mask ) );
1792 if ( ( rc = arbel_cmd_map_eq ( arbel,
1793 ( ARBEL_MAP_EQ | arbel_eq->eqn ),
1794 &mask ) ) != 0 ) {
1795 DBGC ( arbel, "Arbel %p EQN %#lx MAP_EQ failed: %s\n",
1796 arbel, arbel_eq->eqn, strerror ( rc ) );
1797 goto err_map_eq;
1798 }
1799
1800 DBGC ( arbel, "Arbel %p EQN %#lx ring [%08lx,%08lx), doorbell %08lx\n",
1801 arbel, arbel_eq->eqn, virt_to_phys ( arbel_eq->eqe ),
1802 ( virt_to_phys ( arbel_eq->eqe ) + arbel_eq->eqe_size ),
1803 virt_to_phys ( arbel_eq->doorbell ) );
1804 return 0;
1805
1806 err_map_eq:
1807 arbel_cmd_hw2sw_eq ( arbel, arbel_eq->eqn, &eqctx );
1808 err_sw2hw_eq:
1809 free_dma ( arbel_eq->eqe, arbel_eq->eqe_size );
1810 err_eqe:
1811 memset ( arbel_eq, 0, sizeof ( *arbel_eq ) );
1812 return rc;
1813 }
1814
1815 /**
1816 * Destroy event queue
1817 *
1818 * @v arbel Arbel device
1819 */
arbel_destroy_eq(struct arbel * arbel)1820 static void arbel_destroy_eq ( struct arbel *arbel ) {
1821 struct arbel_event_queue *arbel_eq = &arbel->eq;
1822 struct arbelprm_eqc eqctx;
1823 struct arbelprm_event_mask mask;
1824 int rc;
1825
1826 /* Unmap events from event queue */
1827 memset ( &mask, 0, sizeof ( mask ) );
1828 MLX_FILL_1 ( &mask, 1, port_state_change, 1 );
1829 if ( ( rc = arbel_cmd_map_eq ( arbel,
1830 ( ARBEL_UNMAP_EQ | arbel_eq->eqn ),
1831 &mask ) ) != 0 ) {
1832 DBGC ( arbel, "Arbel %p EQN %#lx FATAL MAP_EQ failed to "
1833 "unmap: %s\n", arbel, arbel_eq->eqn, strerror ( rc ) );
1834 /* Continue; HCA may die but system should survive */
1835 }
1836
1837 /* Take ownership back from hardware */
1838 if ( ( rc = arbel_cmd_hw2sw_eq ( arbel, arbel_eq->eqn,
1839 &eqctx ) ) != 0 ) {
1840 DBGC ( arbel, "Arbel %p EQN %#lx FATAL HW2SW_EQ failed: %s\n",
1841 arbel, arbel_eq->eqn, strerror ( rc ) );
1842 /* Leak memory and return; at least we avoid corruption */
1843 return;
1844 }
1845
1846 /* Free memory */
1847 free_dma ( arbel_eq->eqe, arbel_eq->eqe_size );
1848 memset ( arbel_eq, 0, sizeof ( *arbel_eq ) );
1849 }
1850
1851 /**
1852 * Handle port state event
1853 *
1854 * @v arbel Arbel device
1855 * @v eqe Port state change event queue entry
1856 */
arbel_event_port_state_change(struct arbel * arbel,union arbelprm_event_entry * eqe)1857 static void arbel_event_port_state_change ( struct arbel *arbel,
1858 union arbelprm_event_entry *eqe){
1859 unsigned int port;
1860 int link_up;
1861
1862 /* Get port and link status */
1863 port = ( MLX_GET ( &eqe->port_state_change, data.p ) - 1 );
1864 link_up = ( MLX_GET ( &eqe->generic, event_sub_type ) & 0x04 );
1865 DBGC ( arbel, "Arbel %p port %d link %s\n", arbel, ( port + 1 ),
1866 ( link_up ? "up" : "down" ) );
1867
1868 /* Sanity check */
1869 if ( port >= ARBEL_NUM_PORTS ) {
1870 DBGC ( arbel, "Arbel %p port %d does not exist!\n",
1871 arbel, ( port + 1 ) );
1872 return;
1873 }
1874
1875 /* Update MAD parameters */
1876 ib_smc_update ( arbel->ibdev[port], arbel_mad );
1877 }
1878
1879 /**
1880 * Poll event queue
1881 *
1882 * @v ibdev Infiniband device
1883 */
arbel_poll_eq(struct ib_device * ibdev)1884 static void arbel_poll_eq ( struct ib_device *ibdev ) {
1885 struct arbel *arbel = ib_get_drvdata ( ibdev );
1886 struct arbel_event_queue *arbel_eq = &arbel->eq;
1887 union arbelprm_event_entry *eqe;
1888 union arbelprm_eq_doorbell_register db_reg;
1889 unsigned int eqe_idx_mask;
1890 unsigned int event_type;
1891
1892 /* No event is generated upon reaching INIT, so we must poll
1893 * separately for link state changes while we remain DOWN.
1894 */
1895 if ( ib_is_open ( ibdev ) &&
1896 ( ibdev->port_state == IB_PORT_STATE_DOWN ) ) {
1897 ib_smc_update ( ibdev, arbel_mad );
1898 }
1899
1900 /* Poll event queue */
1901 while ( 1 ) {
1902 /* Look for event entry */
1903 eqe_idx_mask = ( ARBEL_NUM_EQES - 1 );
1904 eqe = &arbel_eq->eqe[arbel_eq->next_idx & eqe_idx_mask];
1905 if ( MLX_GET ( &eqe->generic, owner ) != 0 ) {
1906 /* Entry still owned by hardware; end of poll */
1907 break;
1908 }
1909 DBGCP ( arbel, "Arbel %p EQN %#lx event:\n",
1910 arbel, arbel_eq->eqn );
1911 DBGCP_HDA ( arbel, virt_to_phys ( eqe ),
1912 eqe, sizeof ( *eqe ) );
1913
1914 /* Handle event */
1915 event_type = MLX_GET ( &eqe->generic, event_type );
1916 switch ( event_type ) {
1917 case ARBEL_EV_PORT_STATE_CHANGE:
1918 arbel_event_port_state_change ( arbel, eqe );
1919 break;
1920 default:
1921 DBGC ( arbel, "Arbel %p EQN %#lx unrecognised event "
1922 "type %#x:\n",
1923 arbel, arbel_eq->eqn, event_type );
1924 DBGC_HDA ( arbel, virt_to_phys ( eqe ),
1925 eqe, sizeof ( *eqe ) );
1926 break;
1927 }
1928
1929 /* Return ownership to hardware */
1930 MLX_FILL_1 ( &eqe->generic, 7, owner, 1 );
1931 barrier();
1932
1933 /* Update event queue's index */
1934 arbel_eq->next_idx++;
1935
1936 /* Ring doorbell */
1937 MLX_FILL_1 ( &db_reg.ci, 0, ci, arbel_eq->next_idx );
1938 writel ( db_reg.dword[0], arbel_eq->doorbell );
1939 }
1940 }
1941
1942 /***************************************************************************
1943 *
1944 * Firmware control
1945 *
1946 ***************************************************************************
1947 */
1948
1949 /**
1950 * Map virtual to physical address for firmware usage
1951 *
1952 * @v arbel Arbel device
1953 * @v map Mapping function
1954 * @v va Virtual address
1955 * @v pa Physical address
1956 * @v len Length of region
1957 * @ret rc Return status code
1958 */
arbel_map_vpm(struct arbel * arbel,int (* map)(struct arbel * arbel,const struct arbelprm_virtual_physical_mapping *),uint64_t va,physaddr_t pa,size_t len)1959 static int arbel_map_vpm ( struct arbel *arbel,
1960 int ( *map ) ( struct arbel *arbel,
1961 const struct arbelprm_virtual_physical_mapping* ),
1962 uint64_t va, physaddr_t pa, size_t len ) {
1963 struct arbelprm_virtual_physical_mapping mapping;
1964 physaddr_t start;
1965 physaddr_t low;
1966 physaddr_t high;
1967 physaddr_t end;
1968 size_t size;
1969 int rc;
1970
1971 /* Sanity checks */
1972 assert ( ( va & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 );
1973 assert ( ( pa & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 );
1974 assert ( ( len & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 );
1975 assert ( len != 0 );
1976
1977 /* Calculate starting points */
1978 start = pa;
1979 end = ( start + len );
1980 size = ( 1UL << ( fls ( start ^ end ) - 1 ) );
1981 low = high = ( end & ~( size - 1 ) );
1982 assert ( start < low );
1983 assert ( high <= end );
1984
1985 /* These mappings tend to generate huge volumes of
1986 * uninteresting debug data, which basically makes it
1987 * impossible to use debugging otherwise.
1988 */
1989 DBG_DISABLE ( DBGLVL_LOG | DBGLVL_EXTRA );
1990
1991 /* Map blocks in descending order of size */
1992 while ( size >= ARBEL_PAGE_SIZE ) {
1993
1994 /* Find the next candidate block */
1995 if ( ( low - size ) >= start ) {
1996 low -= size;
1997 pa = low;
1998 } else if ( high <= ( end - size ) ) {
1999 pa = high;
2000 high += size;
2001 } else {
2002 size >>= 1;
2003 continue;
2004 }
2005 assert ( ( va & ( size - 1 ) ) == 0 );
2006 assert ( ( pa & ( size - 1 ) ) == 0 );
2007
2008 /* Map this block */
2009 memset ( &mapping, 0, sizeof ( mapping ) );
2010 MLX_FILL_1 ( &mapping, 0, va_h, ( va >> 32 ) );
2011 MLX_FILL_1 ( &mapping, 1, va_l, ( va >> 12 ) );
2012 MLX_FILL_H ( &mapping, 2, pa_h, pa );
2013 MLX_FILL_2 ( &mapping, 3,
2014 log2size, ( ( fls ( size ) - 1 ) - 12 ),
2015 pa_l, ( pa >> 12 ) );
2016 if ( ( rc = map ( arbel, &mapping ) ) != 0 ) {
2017 DBG_ENABLE ( DBGLVL_LOG | DBGLVL_EXTRA );
2018 DBGC ( arbel, "Arbel %p could not map %08llx+%zx to "
2019 "%08lx: %s\n",
2020 arbel, va, size, pa, strerror ( rc ) );
2021 return rc;
2022 }
2023 va += size;
2024 }
2025 assert ( low == start );
2026 assert ( high == end );
2027
2028 DBG_ENABLE ( DBGLVL_LOG | DBGLVL_EXTRA );
2029 return 0;
2030 }
2031
2032 /**
2033 * Start firmware running
2034 *
2035 * @v arbel Arbel device
2036 * @ret rc Return status code
2037 */
arbel_start_firmware(struct arbel * arbel)2038 static int arbel_start_firmware ( struct arbel *arbel ) {
2039 struct arbelprm_query_fw fw;
2040 struct arbelprm_access_lam lam;
2041 unsigned int fw_pages;
2042 size_t fw_len;
2043 physaddr_t fw_base;
2044 uint64_t eq_set_ci_base_addr;
2045 int rc;
2046
2047 /* Get firmware parameters */
2048 if ( ( rc = arbel_cmd_query_fw ( arbel, &fw ) ) != 0 ) {
2049 DBGC ( arbel, "Arbel %p could not query firmware: %s\n",
2050 arbel, strerror ( rc ) );
2051 goto err_query_fw;
2052 }
2053 DBGC ( arbel, "Arbel %p firmware version %d.%d.%d\n", arbel,
2054 MLX_GET ( &fw, fw_rev_major ), MLX_GET ( &fw, fw_rev_minor ),
2055 MLX_GET ( &fw, fw_rev_subminor ) );
2056 fw_pages = MLX_GET ( &fw, fw_pages );
2057 DBGC ( arbel, "Arbel %p requires %d kB for firmware\n",
2058 arbel, ( fw_pages * 4 ) );
2059 eq_set_ci_base_addr =
2060 ( ( (uint64_t) MLX_GET ( &fw, eq_set_ci_base_addr_h ) << 32 ) |
2061 ( (uint64_t) MLX_GET ( &fw, eq_set_ci_base_addr_l ) ) );
2062 arbel->eq_ci_doorbells = ioremap ( eq_set_ci_base_addr, 0x200 );
2063
2064 /* Enable locally-attached memory. Ignore failure; there may
2065 * be no attached memory.
2066 */
2067 arbel_cmd_enable_lam ( arbel, &lam );
2068
2069 /* Allocate firmware pages and map firmware area */
2070 fw_len = ( fw_pages * ARBEL_PAGE_SIZE );
2071 if ( ! arbel->firmware_area ) {
2072 arbel->firmware_len = fw_len;
2073 arbel->firmware_area = umalloc ( arbel->firmware_len );
2074 if ( ! arbel->firmware_area ) {
2075 rc = -ENOMEM;
2076 goto err_alloc_fa;
2077 }
2078 } else {
2079 assert ( arbel->firmware_len == fw_len );
2080 }
2081 fw_base = user_to_phys ( arbel->firmware_area, 0 );
2082 DBGC ( arbel, "Arbel %p firmware area at [%08lx,%08lx)\n",
2083 arbel, fw_base, ( fw_base + fw_len ) );
2084 if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_fa,
2085 0, fw_base, fw_len ) ) != 0 ) {
2086 DBGC ( arbel, "Arbel %p could not map firmware: %s\n",
2087 arbel, strerror ( rc ) );
2088 goto err_map_fa;
2089 }
2090
2091 /* Start firmware */
2092 if ( ( rc = arbel_cmd_run_fw ( arbel ) ) != 0 ) {
2093 DBGC ( arbel, "Arbel %p could not run firmware: %s\n",
2094 arbel, strerror ( rc ) );
2095 goto err_run_fw;
2096 }
2097
2098 DBGC ( arbel, "Arbel %p firmware started\n", arbel );
2099 return 0;
2100
2101 err_run_fw:
2102 arbel_cmd_unmap_fa ( arbel );
2103 err_map_fa:
2104 err_alloc_fa:
2105 err_query_fw:
2106 return rc;
2107 }
2108
2109 /**
2110 * Stop firmware running
2111 *
2112 * @v arbel Arbel device
2113 */
arbel_stop_firmware(struct arbel * arbel)2114 static void arbel_stop_firmware ( struct arbel *arbel ) {
2115 int rc;
2116
2117 if ( ( rc = arbel_cmd_unmap_fa ( arbel ) ) != 0 ) {
2118 DBGC ( arbel, "Arbel %p FATAL could not stop firmware: %s\n",
2119 arbel, strerror ( rc ) );
2120 /* Leak memory and return; at least we avoid corruption */
2121 arbel->firmware_area = UNULL;
2122 return;
2123 }
2124 }
2125
2126 /***************************************************************************
2127 *
2128 * Infinihost Context Memory management
2129 *
2130 ***************************************************************************
2131 */
2132
2133 /**
2134 * Get device limits
2135 *
2136 * @v arbel Arbel device
2137 * @ret rc Return status code
2138 */
arbel_get_limits(struct arbel * arbel)2139 static int arbel_get_limits ( struct arbel *arbel ) {
2140 struct arbelprm_query_dev_lim dev_lim;
2141 int rc;
2142
2143 if ( ( rc = arbel_cmd_query_dev_lim ( arbel, &dev_lim ) ) != 0 ) {
2144 DBGC ( arbel, "Arbel %p could not get device limits: %s\n",
2145 arbel, strerror ( rc ) );
2146 return rc;
2147 }
2148
2149 arbel->limits.reserved_qps =
2150 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_qps ) );
2151 arbel->limits.qpc_entry_size = MLX_GET ( &dev_lim, qpc_entry_sz );
2152 arbel->limits.eqpc_entry_size = MLX_GET ( &dev_lim, eqpc_entry_sz );
2153 arbel->limits.reserved_srqs =
2154 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_srqs ) );
2155 arbel->limits.srqc_entry_size = MLX_GET ( &dev_lim, srq_entry_sz );
2156 arbel->limits.reserved_ees =
2157 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_ees ) );
2158 arbel->limits.eec_entry_size = MLX_GET ( &dev_lim, eec_entry_sz );
2159 arbel->limits.eeec_entry_size = MLX_GET ( &dev_lim, eeec_entry_sz );
2160 arbel->limits.reserved_cqs =
2161 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_cqs ) );
2162 arbel->limits.cqc_entry_size = MLX_GET ( &dev_lim, cqc_entry_sz );
2163 arbel->limits.reserved_mtts =
2164 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_mtts ) );
2165 arbel->limits.mtt_entry_size = MLX_GET ( &dev_lim, mtt_entry_sz );
2166 arbel->limits.reserved_mrws =
2167 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_mrws ) );
2168 arbel->limits.mpt_entry_size = MLX_GET ( &dev_lim, mpt_entry_sz );
2169 arbel->limits.reserved_rdbs =
2170 ( 1 << MLX_GET ( &dev_lim, log2_rsvd_rdbs ) );
2171 arbel->limits.reserved_eqs = MLX_GET ( &dev_lim, num_rsvd_eqs );
2172 arbel->limits.eqc_entry_size = MLX_GET ( &dev_lim, eqc_entry_sz );
2173 arbel->limits.reserved_uars = MLX_GET ( &dev_lim, num_rsvd_uars );
2174 arbel->limits.uar_scratch_entry_size =
2175 MLX_GET ( &dev_lim, uar_scratch_entry_sz );
2176
2177 DBGC ( arbel, "Arbel %p reserves %d x %#zx QPC, %d x %#zx EQPC, "
2178 "%d x %#zx SRQC\n", arbel,
2179 arbel->limits.reserved_qps, arbel->limits.qpc_entry_size,
2180 arbel->limits.reserved_qps, arbel->limits.eqpc_entry_size,
2181 arbel->limits.reserved_srqs, arbel->limits.srqc_entry_size );
2182 DBGC ( arbel, "Arbel %p reserves %d x %#zx EEC, %d x %#zx EEEC, "
2183 "%d x %#zx CQC\n", arbel,
2184 arbel->limits.reserved_ees, arbel->limits.eec_entry_size,
2185 arbel->limits.reserved_ees, arbel->limits.eeec_entry_size,
2186 arbel->limits.reserved_cqs, arbel->limits.cqc_entry_size );
2187 DBGC ( arbel, "Arbel %p reserves %d x %#zx EQC, %d x %#zx MTT, "
2188 "%d x %#zx MPT\n", arbel,
2189 arbel->limits.reserved_eqs, arbel->limits.eqc_entry_size,
2190 arbel->limits.reserved_mtts, arbel->limits.mtt_entry_size,
2191 arbel->limits.reserved_mrws, arbel->limits.mpt_entry_size );
2192 DBGC ( arbel, "Arbel %p reserves %d x %#zx RDB, %d x %#zx UAR, "
2193 "%d x %#zx UAR scratchpad\n", arbel,
2194 arbel->limits.reserved_rdbs, ARBEL_RDB_ENTRY_SIZE,
2195 arbel->limits.reserved_uars, ARBEL_PAGE_SIZE,
2196 arbel->limits.reserved_uars,
2197 arbel->limits.uar_scratch_entry_size );
2198
2199 return 0;
2200 }
2201
2202 /**
2203 * Align ICM table
2204 *
2205 * @v icm_offset Current ICM offset
2206 * @v len ICM table length
2207 * @ret icm_offset ICM offset
2208 */
icm_align(size_t icm_offset,size_t len)2209 static size_t icm_align ( size_t icm_offset, size_t len ) {
2210
2211 /* Round up to a multiple of the table size */
2212 assert ( len == ( 1UL << ( fls ( len ) - 1 ) ) );
2213 return ( ( icm_offset + len - 1 ) & ~( len - 1 ) );
2214 }
2215
2216 /**
2217 * Allocate ICM
2218 *
2219 * @v arbel Arbel device
2220 * @v init_hca INIT_HCA structure to fill in
2221 * @ret rc Return status code
2222 */
arbel_alloc_icm(struct arbel * arbel,struct arbelprm_init_hca * init_hca)2223 static int arbel_alloc_icm ( struct arbel *arbel,
2224 struct arbelprm_init_hca *init_hca ) {
2225 struct arbelprm_scalar_parameter icm_size;
2226 struct arbelprm_scalar_parameter icm_aux_size;
2227 struct arbelprm_scalar_parameter unmap_icm;
2228 union arbelprm_doorbell_record *db_rec;
2229 size_t icm_offset = 0;
2230 unsigned int log_num_uars, log_num_qps, log_num_srqs, log_num_ees;
2231 unsigned int log_num_cqs, log_num_mtts, log_num_mpts, log_num_rdbs;
2232 unsigned int log_num_eqs, log_num_mcs;
2233 size_t icm_len, icm_aux_len;
2234 size_t len;
2235 physaddr_t icm_phys;
2236 int rc;
2237
2238 /* Calculate number of each object type within ICM */
2239 log_num_qps = fls ( arbel->limits.reserved_qps +
2240 ARBEL_RSVD_SPECIAL_QPS + ARBEL_MAX_QPS - 1 );
2241 log_num_srqs = fls ( arbel->limits.reserved_srqs - 1 );
2242 log_num_ees = fls ( arbel->limits.reserved_ees - 1 );
2243 log_num_cqs = fls ( arbel->limits.reserved_cqs + ARBEL_MAX_CQS - 1 );
2244 log_num_eqs = fls ( arbel->limits.reserved_eqs + ARBEL_MAX_EQS - 1 );
2245 log_num_mtts = fls ( arbel->limits.reserved_mtts - 1 );
2246 log_num_mpts = fls ( arbel->limits.reserved_mrws + 1 - 1 );
2247 log_num_rdbs = fls ( arbel->limits.reserved_rdbs +
2248 ARBEL_RSVD_SPECIAL_QPS + ARBEL_MAX_QPS - 1 );
2249 log_num_uars = fls ( arbel->limits.reserved_uars +
2250 1 /* single UAR used */ - 1 );
2251 log_num_mcs = ARBEL_LOG_MULTICAST_HASH_SIZE;
2252
2253 /* Queue pair contexts */
2254 len = ( ( 1 << log_num_qps ) * arbel->limits.qpc_entry_size );
2255 icm_offset = icm_align ( icm_offset, len );
2256 MLX_FILL_2 ( init_hca, 13,
2257 qpc_eec_cqc_eqc_rdb_parameters.qpc_base_addr_l,
2258 ( icm_offset >> 7 ),
2259 qpc_eec_cqc_eqc_rdb_parameters.log_num_of_qp,
2260 log_num_qps );
2261 DBGC ( arbel, "Arbel %p ICM QPC is %d x %#zx at [%zx,%zx)\n",
2262 arbel, ( 1 << log_num_qps ), arbel->limits.qpc_entry_size,
2263 icm_offset, ( icm_offset + len ) );
2264 icm_offset += len;
2265
2266 /* Extended queue pair contexts */
2267 len = ( ( 1 << log_num_qps ) * arbel->limits.eqpc_entry_size );
2268 icm_offset = icm_align ( icm_offset, len );
2269 MLX_FILL_1 ( init_hca, 25,
2270 qpc_eec_cqc_eqc_rdb_parameters.eqpc_base_addr_l,
2271 icm_offset );
2272 DBGC ( arbel, "Arbel %p ICM EQPC is %d x %#zx at [%zx,%zx)\n",
2273 arbel, ( 1 << log_num_qps ), arbel->limits.eqpc_entry_size,
2274 icm_offset, ( icm_offset + len ) );
2275 icm_offset += len;
2276
2277 /* Completion queue contexts */
2278 len = ( ( 1 << log_num_cqs ) * arbel->limits.cqc_entry_size );
2279 icm_offset = icm_align ( icm_offset, len );
2280 MLX_FILL_2 ( init_hca, 21,
2281 qpc_eec_cqc_eqc_rdb_parameters.cqc_base_addr_l,
2282 ( icm_offset >> 6 ),
2283 qpc_eec_cqc_eqc_rdb_parameters.log_num_of_cq,
2284 log_num_cqs );
2285 DBGC ( arbel, "Arbel %p ICM CQC is %d x %#zx at [%zx,%zx)\n",
2286 arbel, ( 1 << log_num_cqs ), arbel->limits.cqc_entry_size,
2287 icm_offset, ( icm_offset + len ) );
2288 icm_offset += len;
2289
2290 /* Event queue contexts */
2291 len = ( ( 1 << log_num_eqs ) * arbel->limits.eqc_entry_size );
2292 icm_offset = icm_align ( icm_offset, len );
2293 MLX_FILL_2 ( init_hca, 33,
2294 qpc_eec_cqc_eqc_rdb_parameters.eqc_base_addr_l,
2295 ( icm_offset >> 6 ),
2296 qpc_eec_cqc_eqc_rdb_parameters.log_num_eq,
2297 log_num_eqs );
2298 DBGC ( arbel, "Arbel %p ICM EQC is %d x %#zx at [%zx,%zx)\n",
2299 arbel, ( 1 << log_num_eqs ), arbel->limits.eqc_entry_size,
2300 icm_offset, ( icm_offset + len ) );
2301 icm_offset += len;
2302
2303 /* End-to-end contexts */
2304 len = ( ( 1 << log_num_ees ) * arbel->limits.eec_entry_size );
2305 icm_offset = icm_align ( icm_offset, len );
2306 MLX_FILL_2 ( init_hca, 17,
2307 qpc_eec_cqc_eqc_rdb_parameters.eec_base_addr_l,
2308 ( icm_offset >> 7 ),
2309 qpc_eec_cqc_eqc_rdb_parameters.log_num_of_ee,
2310 log_num_ees );
2311 DBGC ( arbel, "Arbel %p ICM EEC is %d x %#zx at [%zx,%zx)\n",
2312 arbel, ( 1 << log_num_ees ), arbel->limits.eec_entry_size,
2313 icm_offset, ( icm_offset + len ) );
2314 icm_offset += len;
2315
2316 /* Shared receive queue contexts */
2317 len = ( ( 1 << log_num_srqs ) * arbel->limits.srqc_entry_size );
2318 icm_offset = icm_align ( icm_offset, len );
2319 MLX_FILL_2 ( init_hca, 19,
2320 qpc_eec_cqc_eqc_rdb_parameters.srqc_base_addr_l,
2321 ( icm_offset >> 5 ),
2322 qpc_eec_cqc_eqc_rdb_parameters.log_num_of_srq,
2323 log_num_srqs );
2324 DBGC ( arbel, "Arbel %p ICM SRQC is %d x %#zx at [%zx,%zx)\n",
2325 arbel, ( 1 << log_num_srqs ), arbel->limits.srqc_entry_size,
2326 icm_offset, ( icm_offset + len ) );
2327 icm_offset += len;
2328
2329 /* Memory protection table */
2330 len = ( ( 1 << log_num_mpts ) * arbel->limits.mpt_entry_size );
2331 icm_offset = icm_align ( icm_offset, len );
2332 MLX_FILL_1 ( init_hca, 61,
2333 tpt_parameters.mpt_base_adr_l, icm_offset );
2334 MLX_FILL_1 ( init_hca, 62,
2335 tpt_parameters.log_mpt_sz, log_num_mpts );
2336 DBGC ( arbel, "Arbel %p ICM MPT is %d x %#zx at [%zx,%zx)\n",
2337 arbel, ( 1 << log_num_mpts ), arbel->limits.mpt_entry_size,
2338 icm_offset, ( icm_offset + len ) );
2339 icm_offset += len;
2340
2341 /* Remote read data base table */
2342 len = ( ( 1 << log_num_rdbs ) * ARBEL_RDB_ENTRY_SIZE );
2343 icm_offset = icm_align ( icm_offset, len );
2344 MLX_FILL_1 ( init_hca, 37,
2345 qpc_eec_cqc_eqc_rdb_parameters.rdb_base_addr_l,
2346 icm_offset );
2347 DBGC ( arbel, "Arbel %p ICM RDB is %d x %#zx at [%zx,%zx)\n",
2348 arbel, ( 1 << log_num_rdbs ), ARBEL_RDB_ENTRY_SIZE,
2349 icm_offset, ( icm_offset + len ) );
2350 icm_offset += len;
2351
2352 /* Extended end-to-end contexts */
2353 len = ( ( 1 << log_num_ees ) * arbel->limits.eeec_entry_size );
2354 icm_offset = icm_align ( icm_offset, len );
2355 MLX_FILL_1 ( init_hca, 29,
2356 qpc_eec_cqc_eqc_rdb_parameters.eeec_base_addr_l,
2357 icm_offset );
2358 DBGC ( arbel, "Arbel %p ICM EEEC is %d x %#zx at [%zx,%zx)\n",
2359 arbel, ( 1 << log_num_ees ), arbel->limits.eeec_entry_size,
2360 icm_offset, ( icm_offset + len ) );
2361 icm_offset += len;
2362
2363 /* Multicast table */
2364 len = ( ( 1 << log_num_mcs ) * sizeof ( struct arbelprm_mgm_entry ) );
2365 icm_offset = icm_align ( icm_offset, len );
2366 MLX_FILL_1 ( init_hca, 49,
2367 multicast_parameters.mc_base_addr_l, icm_offset );
2368 MLX_FILL_1 ( init_hca, 52,
2369 multicast_parameters.log_mc_table_entry_sz,
2370 fls ( sizeof ( struct arbelprm_mgm_entry ) - 1 ) );
2371 MLX_FILL_1 ( init_hca, 53,
2372 multicast_parameters.mc_table_hash_sz,
2373 ( 1 << log_num_mcs ) );
2374 MLX_FILL_1 ( init_hca, 54,
2375 multicast_parameters.log_mc_table_sz,
2376 log_num_mcs /* Only one entry per hash */ );
2377 DBGC ( arbel, "Arbel %p ICM MC is %d x %#zx at [%zx,%zx)\n", arbel,
2378 ( 1 << log_num_mcs ), sizeof ( struct arbelprm_mgm_entry ),
2379 icm_offset, ( icm_offset + len ) );
2380 icm_offset += len;
2381
2382 /* Memory translation table */
2383 len = ( ( 1 << log_num_mtts ) * arbel->limits.mtt_entry_size );
2384 icm_offset = icm_align ( icm_offset, len );
2385 MLX_FILL_1 ( init_hca, 65,
2386 tpt_parameters.mtt_base_addr_l, icm_offset );
2387 DBGC ( arbel, "Arbel %p ICM MTT is %d x %#zx at [%zx,%zx)\n",
2388 arbel, ( 1 << log_num_mtts ), arbel->limits.mtt_entry_size,
2389 icm_offset, ( icm_offset + len ) );
2390 icm_offset += len;
2391
2392 /* User access region scratchpads */
2393 len = ( ( 1 << log_num_uars ) * arbel->limits.uar_scratch_entry_size );
2394 icm_offset = icm_align ( icm_offset, len );
2395 MLX_FILL_1 ( init_hca, 77,
2396 uar_parameters.uar_scratch_base_addr_l, icm_offset );
2397 DBGC ( arbel, "Arbel %p UAR scratchpad is %d x %#zx at [%zx,%zx)\n",
2398 arbel, ( 1 << log_num_uars ),
2399 arbel->limits.uar_scratch_entry_size,
2400 icm_offset, ( icm_offset + len ) );
2401 icm_offset += len;
2402
2403 /* Record amount of ICM to be allocated */
2404 icm_offset = icm_align ( icm_offset, ARBEL_PAGE_SIZE );
2405 icm_len = icm_offset;
2406
2407 /* User access region contexts
2408 *
2409 * The reserved UAR(s) do not need to be backed by physical
2410 * memory, and our UAR is allocated separately; neither are
2411 * part of the umalloc()ed ICM block, but both contribute to
2412 * the total length of ICM virtual address space.
2413 */
2414 len = ( ( 1 << log_num_uars ) * ARBEL_PAGE_SIZE );
2415 icm_offset = icm_align ( icm_offset, len );
2416 MLX_FILL_1 ( init_hca, 74, uar_parameters.log_max_uars, log_num_uars );
2417 MLX_FILL_1 ( init_hca, 79,
2418 uar_parameters.uar_context_base_addr_l, icm_offset );
2419 arbel->db_rec_offset =
2420 ( icm_offset +
2421 ( arbel->limits.reserved_uars * ARBEL_PAGE_SIZE ) );
2422 DBGC ( arbel, "Arbel %p UAR is %d x %#zx at [%zx,%zx), doorbells "
2423 "[%zx,%zx)\n", arbel, ( 1 << log_num_uars ), ARBEL_PAGE_SIZE,
2424 icm_offset, ( icm_offset + len ), arbel->db_rec_offset,
2425 ( arbel->db_rec_offset + ARBEL_PAGE_SIZE ) );
2426 icm_offset += len;
2427
2428 /* Get ICM auxiliary area size */
2429 memset ( &icm_size, 0, sizeof ( icm_size ) );
2430 MLX_FILL_1 ( &icm_size, 1, value, icm_len );
2431 if ( ( rc = arbel_cmd_set_icm_size ( arbel, &icm_size,
2432 &icm_aux_size ) ) != 0 ) {
2433 DBGC ( arbel, "Arbel %p could not set ICM size: %s\n",
2434 arbel, strerror ( rc ) );
2435 goto err_set_icm_size;
2436 }
2437 icm_aux_len = ( MLX_GET ( &icm_aux_size, value ) * ARBEL_PAGE_SIZE );
2438
2439 /* Allocate ICM data and auxiliary area */
2440 DBGC ( arbel, "Arbel %p requires %zd kB ICM and %zd kB AUX ICM\n",
2441 arbel, ( icm_len / 1024 ), ( icm_aux_len / 1024 ) );
2442 if ( ! arbel->icm ) {
2443 arbel->icm_len = icm_len;
2444 arbel->icm_aux_len = icm_aux_len;
2445 arbel->icm = umalloc ( arbel->icm_len + arbel->icm_aux_len );
2446 if ( ! arbel->icm ) {
2447 rc = -ENOMEM;
2448 goto err_alloc_icm;
2449 }
2450 } else {
2451 assert ( arbel->icm_len == icm_len );
2452 assert ( arbel->icm_aux_len == icm_aux_len );
2453 }
2454 icm_phys = user_to_phys ( arbel->icm, 0 );
2455
2456 /* Allocate doorbell UAR */
2457 arbel->db_rec = malloc_dma ( ARBEL_PAGE_SIZE, ARBEL_PAGE_SIZE );
2458 if ( ! arbel->db_rec ) {
2459 rc = -ENOMEM;
2460 goto err_alloc_doorbell;
2461 }
2462
2463 /* Map ICM auxiliary area */
2464 DBGC ( arbel, "Arbel %p ICM AUX at [%08lx,%08lx)\n",
2465 arbel, icm_phys, ( icm_phys + arbel->icm_aux_len ) );
2466 if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm_aux,
2467 0, icm_phys, arbel->icm_aux_len ) ) != 0 ){
2468 DBGC ( arbel, "Arbel %p could not map AUX ICM: %s\n",
2469 arbel, strerror ( rc ) );
2470 goto err_map_icm_aux;
2471 }
2472 icm_phys += arbel->icm_aux_len;
2473
2474 /* Map ICM area */
2475 DBGC ( arbel, "Arbel %p ICM at [%08lx,%08lx)\n",
2476 arbel, icm_phys, ( icm_phys + arbel->icm_len ) );
2477 if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm,
2478 0, icm_phys, arbel->icm_len ) ) != 0 ) {
2479 DBGC ( arbel, "Arbel %p could not map ICM: %s\n",
2480 arbel, strerror ( rc ) );
2481 goto err_map_icm;
2482 }
2483 icm_phys += arbel->icm_len;
2484
2485 /* Map doorbell UAR */
2486 DBGC ( arbel, "Arbel %p UAR at [%08lx,%08lx)\n",
2487 arbel, virt_to_phys ( arbel->db_rec ),
2488 ( virt_to_phys ( arbel->db_rec ) + ARBEL_PAGE_SIZE ) );
2489 if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm,
2490 arbel->db_rec_offset,
2491 virt_to_phys ( arbel->db_rec ),
2492 ARBEL_PAGE_SIZE ) ) != 0 ) {
2493 DBGC ( arbel, "Arbel %p could not map doorbell UAR: %s\n",
2494 arbel, strerror ( rc ) );
2495 goto err_map_doorbell;
2496 }
2497
2498 /* Initialise doorbell records */
2499 memset ( arbel->db_rec, 0, ARBEL_PAGE_SIZE );
2500 db_rec = &arbel->db_rec[ARBEL_GROUP_SEPARATOR_DOORBELL];
2501 MLX_FILL_1 ( &db_rec->qp, 1, res, ARBEL_UAR_RES_GROUP_SEP );
2502
2503 return 0;
2504
2505 memset ( &unmap_icm, 0, sizeof ( unmap_icm ) );
2506 MLX_FILL_1 ( &unmap_icm, 1, value, arbel->db_rec_offset );
2507 arbel_cmd_unmap_icm ( arbel, 1, &unmap_icm );
2508 err_map_doorbell:
2509 memset ( &unmap_icm, 0, sizeof ( unmap_icm ) );
2510 arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / ARBEL_PAGE_SIZE ),
2511 &unmap_icm );
2512 err_map_icm:
2513 arbel_cmd_unmap_icm_aux ( arbel );
2514 err_map_icm_aux:
2515 free_dma ( arbel->db_rec, ARBEL_PAGE_SIZE );
2516 arbel->db_rec= NULL;
2517 err_alloc_doorbell:
2518 err_alloc_icm:
2519 err_set_icm_size:
2520 return rc;
2521 }
2522
2523 /**
2524 * Free ICM
2525 *
2526 * @v arbel Arbel device
2527 */
arbel_free_icm(struct arbel * arbel)2528 static void arbel_free_icm ( struct arbel *arbel ) {
2529 struct arbelprm_scalar_parameter unmap_icm;
2530
2531 memset ( &unmap_icm, 0, sizeof ( unmap_icm ) );
2532 MLX_FILL_1 ( &unmap_icm, 1, value, arbel->db_rec_offset );
2533 arbel_cmd_unmap_icm ( arbel, 1, &unmap_icm );
2534 memset ( &unmap_icm, 0, sizeof ( unmap_icm ) );
2535 arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / ARBEL_PAGE_SIZE ),
2536 &unmap_icm );
2537 arbel_cmd_unmap_icm_aux ( arbel );
2538 free_dma ( arbel->db_rec, ARBEL_PAGE_SIZE );
2539 arbel->db_rec = NULL;
2540 }
2541
2542 /***************************************************************************
2543 *
2544 * Initialisation and teardown
2545 *
2546 ***************************************************************************
2547 */
2548
2549 /**
2550 * Reset device
2551 *
2552 * @v arbel Arbel device
2553 */
arbel_reset(struct arbel * arbel)2554 static void arbel_reset ( struct arbel *arbel ) {
2555 struct pci_device *pci = arbel->pci;
2556 struct pci_config_backup backup;
2557 static const uint8_t backup_exclude[] =
2558 PCI_CONFIG_BACKUP_EXCLUDE ( 0x58, 0x5c );
2559 uint16_t vendor;
2560 unsigned int i;
2561
2562 /* Perform device reset and preserve PCI configuration */
2563 pci_backup ( pci, &backup, backup_exclude );
2564 writel ( ARBEL_RESET_MAGIC,
2565 ( arbel->config + ARBEL_RESET_OFFSET ) );
2566 for ( i = 0 ; i < ARBEL_RESET_WAIT_TIME_MS ; i++ ) {
2567 mdelay ( 1 );
2568 pci_read_config_word ( pci, PCI_VENDOR_ID, &vendor );
2569 if ( vendor != 0xffff )
2570 break;
2571 }
2572 pci_restore ( pci, &backup, backup_exclude );
2573 }
2574
2575 /**
2576 * Set up memory protection table
2577 *
2578 * @v arbel Arbel device
2579 * @ret rc Return status code
2580 */
arbel_setup_mpt(struct arbel * arbel)2581 static int arbel_setup_mpt ( struct arbel *arbel ) {
2582 struct arbelprm_mpt mpt;
2583 uint32_t key;
2584 int rc;
2585
2586 /* Derive key */
2587 key = ( arbel->limits.reserved_mrws | ARBEL_MKEY_PREFIX );
2588 arbel->lkey = ( ( key << 8 ) | ( key >> 24 ) );
2589
2590 /* Initialise memory protection table */
2591 memset ( &mpt, 0, sizeof ( mpt ) );
2592 MLX_FILL_7 ( &mpt, 0,
2593 a, 1,
2594 rw, 1,
2595 rr, 1,
2596 lw, 1,
2597 lr, 1,
2598 pa, 1,
2599 r_w, 1 );
2600 MLX_FILL_1 ( &mpt, 2, mem_key, key );
2601 MLX_FILL_2 ( &mpt, 3,
2602 pd, ARBEL_GLOBAL_PD,
2603 rae, 1 );
2604 MLX_FILL_1 ( &mpt, 6, reg_wnd_len_h, 0xffffffffUL );
2605 MLX_FILL_1 ( &mpt, 7, reg_wnd_len_l, 0xffffffffUL );
2606 if ( ( rc = arbel_cmd_sw2hw_mpt ( arbel, arbel->limits.reserved_mrws,
2607 &mpt ) ) != 0 ) {
2608 DBGC ( arbel, "Arbel %p could not set up MPT: %s\n",
2609 arbel, strerror ( rc ) );
2610 return rc;
2611 }
2612
2613 return 0;
2614 }
2615
2616 /**
2617 * Configure special queue pairs
2618 *
2619 * @v arbel Arbel device
2620 * @ret rc Return status code
2621 */
arbel_configure_special_qps(struct arbel * arbel)2622 static int arbel_configure_special_qps ( struct arbel *arbel ) {
2623 unsigned int smi_qpn_base;
2624 unsigned int gsi_qpn_base;
2625 int rc;
2626
2627 /* Special QP block must be aligned on an even number */
2628 arbel->special_qpn_base = ( ( arbel->limits.reserved_qps + 1 ) & ~1 );
2629 arbel->qpn_base = ( arbel->special_qpn_base +
2630 ARBEL_NUM_SPECIAL_QPS );
2631 DBGC ( arbel, "Arbel %p special QPs at [%lx,%lx]\n", arbel,
2632 arbel->special_qpn_base, ( arbel->qpn_base - 1 ) );
2633 smi_qpn_base = arbel->special_qpn_base;
2634 gsi_qpn_base = ( smi_qpn_base + 2 );
2635
2636 /* Issue commands to configure special QPs */
2637 if ( ( rc = arbel_cmd_conf_special_qp ( arbel, 0,
2638 smi_qpn_base ) ) != 0 ) {
2639 DBGC ( arbel, "Arbel %p could not configure SMI QPs: %s\n",
2640 arbel, strerror ( rc ) );
2641 return rc;
2642 }
2643 if ( ( rc = arbel_cmd_conf_special_qp ( arbel, 1,
2644 gsi_qpn_base ) ) != 0 ) {
2645 DBGC ( arbel, "Arbel %p could not configure GSI QPs: %s\n",
2646 arbel, strerror ( rc ) );
2647 return rc;
2648 }
2649
2650 return 0;
2651 }
2652
2653 /**
2654 * Start Arbel device
2655 *
2656 * @v arbel Arbel device
2657 * @v running Firmware is already running
2658 * @ret rc Return status code
2659 */
arbel_start(struct arbel * arbel,int running)2660 static int arbel_start ( struct arbel *arbel, int running ) {
2661 struct arbelprm_init_hca init_hca;
2662 unsigned int i;
2663 int rc;
2664
2665 /* Start firmware if not already running */
2666 if ( ! running ) {
2667 if ( ( rc = arbel_start_firmware ( arbel ) ) != 0 )
2668 goto err_start_firmware;
2669 }
2670
2671 /* Allocate ICM */
2672 memset ( &init_hca, 0, sizeof ( init_hca ) );
2673 if ( ( rc = arbel_alloc_icm ( arbel, &init_hca ) ) != 0 )
2674 goto err_alloc_icm;
2675
2676 /* Initialise HCA */
2677 if ( ( rc = arbel_cmd_init_hca ( arbel, &init_hca ) ) != 0 ) {
2678 DBGC ( arbel, "Arbel %p could not initialise HCA: %s\n",
2679 arbel, strerror ( rc ) );
2680 goto err_init_hca;
2681 }
2682
2683 /* Set up memory protection */
2684 if ( ( rc = arbel_setup_mpt ( arbel ) ) != 0 )
2685 goto err_setup_mpt;
2686 for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ )
2687 arbel->ibdev[i]->rdma_key = arbel->lkey;
2688
2689 /* Set up event queue */
2690 if ( ( rc = arbel_create_eq ( arbel ) ) != 0 )
2691 goto err_create_eq;
2692
2693 /* Configure special QPs */
2694 if ( ( rc = arbel_configure_special_qps ( arbel ) ) != 0 )
2695 goto err_conf_special_qps;
2696
2697 return 0;
2698
2699 err_conf_special_qps:
2700 arbel_destroy_eq ( arbel );
2701 err_create_eq:
2702 err_setup_mpt:
2703 arbel_cmd_close_hca ( arbel );
2704 err_init_hca:
2705 arbel_free_icm ( arbel );
2706 err_alloc_icm:
2707 arbel_stop_firmware ( arbel );
2708 err_start_firmware:
2709 return rc;
2710 }
2711
2712 /**
2713 * Stop Arbel device
2714 *
2715 * @v arbel Arbel device
2716 */
arbel_stop(struct arbel * arbel)2717 static void arbel_stop ( struct arbel *arbel ) {
2718 arbel_destroy_eq ( arbel );
2719 arbel_cmd_close_hca ( arbel );
2720 arbel_free_icm ( arbel );
2721 arbel_stop_firmware ( arbel );
2722 arbel_reset ( arbel );
2723 }
2724
2725 /**
2726 * Open Arbel device
2727 *
2728 * @v arbel Arbel device
2729 * @ret rc Return status code
2730 */
arbel_open(struct arbel * arbel)2731 static int arbel_open ( struct arbel *arbel ) {
2732 int rc;
2733
2734 /* Start device if applicable */
2735 if ( arbel->open_count == 0 ) {
2736 if ( ( rc = arbel_start ( arbel, 0 ) ) != 0 )
2737 return rc;
2738 }
2739
2740 /* Increment open counter */
2741 arbel->open_count++;
2742
2743 return 0;
2744 }
2745
2746 /**
2747 * Close Arbel device
2748 *
2749 * @v arbel Arbel device
2750 */
arbel_close(struct arbel * arbel)2751 static void arbel_close ( struct arbel *arbel ) {
2752
2753 /* Decrement open counter */
2754 assert ( arbel->open_count != 0 );
2755 arbel->open_count--;
2756
2757 /* Stop device if applicable */
2758 if ( arbel->open_count == 0 )
2759 arbel_stop ( arbel );
2760 }
2761
2762 /***************************************************************************
2763 *
2764 * Infiniband link-layer operations
2765 *
2766 ***************************************************************************
2767 */
2768
2769 /**
2770 * Initialise Infiniband link
2771 *
2772 * @v ibdev Infiniband device
2773 * @ret rc Return status code
2774 */
arbel_ib_open(struct ib_device * ibdev)2775 static int arbel_ib_open ( struct ib_device *ibdev ) {
2776 struct arbel *arbel = ib_get_drvdata ( ibdev );
2777 struct arbelprm_init_ib init_ib;
2778 int rc;
2779
2780 /* Open hardware */
2781 if ( ( rc = arbel_open ( arbel ) ) != 0 )
2782 goto err_open;
2783
2784 /* Initialise IB */
2785 memset ( &init_ib, 0, sizeof ( init_ib ) );
2786 MLX_FILL_3 ( &init_ib, 0,
2787 mtu_cap, ARBEL_MTU_2048,
2788 port_width_cap, 3,
2789 vl_cap, 1 );
2790 MLX_FILL_1 ( &init_ib, 1, max_gid, 1 );
2791 MLX_FILL_1 ( &init_ib, 2, max_pkey, 64 );
2792 if ( ( rc = arbel_cmd_init_ib ( arbel, ibdev->port,
2793 &init_ib ) ) != 0 ) {
2794 DBGC ( arbel, "Arbel %p port %d could not intialise IB: %s\n",
2795 arbel, ibdev->port, strerror ( rc ) );
2796 goto err_init_ib;
2797 }
2798
2799 /* Update MAD parameters */
2800 ib_smc_update ( ibdev, arbel_mad );
2801
2802 return 0;
2803
2804 err_init_ib:
2805 arbel_close ( arbel );
2806 err_open:
2807 return rc;
2808 }
2809
2810 /**
2811 * Close Infiniband link
2812 *
2813 * @v ibdev Infiniband device
2814 */
arbel_ib_close(struct ib_device * ibdev)2815 static void arbel_ib_close ( struct ib_device *ibdev ) {
2816 struct arbel *arbel = ib_get_drvdata ( ibdev );
2817 int rc;
2818
2819 /* Close IB */
2820 if ( ( rc = arbel_cmd_close_ib ( arbel, ibdev->port ) ) != 0 ) {
2821 DBGC ( arbel, "Arbel %p port %d could not close IB: %s\n",
2822 arbel, ibdev->port, strerror ( rc ) );
2823 /* Nothing we can do about this */
2824 }
2825
2826 /* Close hardware */
2827 arbel_close ( arbel );
2828 }
2829
2830 /**
2831 * Inform embedded subnet management agent of a received MAD
2832 *
2833 * @v ibdev Infiniband device
2834 * @v mad MAD
2835 * @ret rc Return status code
2836 */
arbel_inform_sma(struct ib_device * ibdev,union ib_mad * mad)2837 static int arbel_inform_sma ( struct ib_device *ibdev, union ib_mad *mad ) {
2838 int rc;
2839
2840 /* Send the MAD to the embedded SMA */
2841 if ( ( rc = arbel_mad ( ibdev, mad ) ) != 0 )
2842 return rc;
2843
2844 /* Update parameters held in software */
2845 ib_smc_update ( ibdev, arbel_mad );
2846
2847 return 0;
2848 }
2849
2850 /***************************************************************************
2851 *
2852 * Multicast group operations
2853 *
2854 ***************************************************************************
2855 */
2856
2857 /**
2858 * Attach to multicast group
2859 *
2860 * @v ibdev Infiniband device
2861 * @v qp Queue pair
2862 * @v gid Multicast GID
2863 * @ret rc Return status code
2864 */
arbel_mcast_attach(struct ib_device * ibdev,struct ib_queue_pair * qp,union ib_gid * gid)2865 static int arbel_mcast_attach ( struct ib_device *ibdev,
2866 struct ib_queue_pair *qp,
2867 union ib_gid *gid ) {
2868 struct arbel *arbel = ib_get_drvdata ( ibdev );
2869 struct arbelprm_mgm_hash hash;
2870 struct arbelprm_mgm_entry mgm;
2871 unsigned int index;
2872 int rc;
2873
2874 /* Generate hash table index */
2875 if ( ( rc = arbel_cmd_mgid_hash ( arbel, gid, &hash ) ) != 0 ) {
2876 DBGC ( arbel, "Arbel %p could not hash GID: %s\n",
2877 arbel, strerror ( rc ) );
2878 return rc;
2879 }
2880 index = MLX_GET ( &hash, hash );
2881
2882 /* Check for existing hash table entry */
2883 if ( ( rc = arbel_cmd_read_mgm ( arbel, index, &mgm ) ) != 0 ) {
2884 DBGC ( arbel, "Arbel %p could not read MGM %#x: %s\n",
2885 arbel, index, strerror ( rc ) );
2886 return rc;
2887 }
2888 if ( MLX_GET ( &mgm, mgmqp_0.qi ) != 0 ) {
2889 /* FIXME: this implementation allows only a single QP
2890 * per multicast group, and doesn't handle hash
2891 * collisions. Sufficient for IPoIB but may need to
2892 * be extended in future.
2893 */
2894 DBGC ( arbel, "Arbel %p MGID index %#x already in use\n",
2895 arbel, index );
2896 return -EBUSY;
2897 }
2898
2899 /* Update hash table entry */
2900 MLX_FILL_2 ( &mgm, 8,
2901 mgmqp_0.qpn_i, qp->qpn,
2902 mgmqp_0.qi, 1 );
2903 memcpy ( &mgm.u.dwords[4], gid, sizeof ( *gid ) );
2904 if ( ( rc = arbel_cmd_write_mgm ( arbel, index, &mgm ) ) != 0 ) {
2905 DBGC ( arbel, "Arbel %p could not write MGM %#x: %s\n",
2906 arbel, index, strerror ( rc ) );
2907 return rc;
2908 }
2909
2910 return 0;
2911 }
2912
2913 /**
2914 * Detach from multicast group
2915 *
2916 * @v ibdev Infiniband device
2917 * @v qp Queue pair
2918 * @v gid Multicast GID
2919 */
arbel_mcast_detach(struct ib_device * ibdev,struct ib_queue_pair * qp __unused,union ib_gid * gid)2920 static void arbel_mcast_detach ( struct ib_device *ibdev,
2921 struct ib_queue_pair *qp __unused,
2922 union ib_gid *gid ) {
2923 struct arbel *arbel = ib_get_drvdata ( ibdev );
2924 struct arbelprm_mgm_hash hash;
2925 struct arbelprm_mgm_entry mgm;
2926 unsigned int index;
2927 int rc;
2928
2929 /* Generate hash table index */
2930 if ( ( rc = arbel_cmd_mgid_hash ( arbel, gid, &hash ) ) != 0 ) {
2931 DBGC ( arbel, "Arbel %p could not hash GID: %s\n",
2932 arbel, strerror ( rc ) );
2933 return;
2934 }
2935 index = MLX_GET ( &hash, hash );
2936
2937 /* Clear hash table entry */
2938 memset ( &mgm, 0, sizeof ( mgm ) );
2939 if ( ( rc = arbel_cmd_write_mgm ( arbel, index, &mgm ) ) != 0 ) {
2940 DBGC ( arbel, "Arbel %p could not write MGM %#x: %s\n",
2941 arbel, index, strerror ( rc ) );
2942 return;
2943 }
2944 }
2945
2946 /** Arbel Infiniband operations */
2947 static struct ib_device_operations arbel_ib_operations = {
2948 .create_cq = arbel_create_cq,
2949 .destroy_cq = arbel_destroy_cq,
2950 .create_qp = arbel_create_qp,
2951 .modify_qp = arbel_modify_qp,
2952 .destroy_qp = arbel_destroy_qp,
2953 .post_send = arbel_post_send,
2954 .post_recv = arbel_post_recv,
2955 .poll_cq = arbel_poll_cq,
2956 .poll_eq = arbel_poll_eq,
2957 .open = arbel_ib_open,
2958 .close = arbel_ib_close,
2959 .mcast_attach = arbel_mcast_attach,
2960 .mcast_detach = arbel_mcast_detach,
2961 .set_port_info = arbel_inform_sma,
2962 .set_pkey_table = arbel_inform_sma,
2963 };
2964
2965 /***************************************************************************
2966 *
2967 * PCI interface
2968 *
2969 ***************************************************************************
2970 */
2971
2972 /**
2973 * Allocate Arbel device
2974 *
2975 * @ret arbel Arbel device
2976 */
arbel_alloc(void)2977 static struct arbel * arbel_alloc ( void ) {
2978 struct arbel *arbel;
2979
2980 /* Allocate Arbel device */
2981 arbel = zalloc ( sizeof ( *arbel ) );
2982 if ( ! arbel )
2983 goto err_arbel;
2984
2985 /* Allocate space for mailboxes */
2986 arbel->mailbox_in = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN );
2987 if ( ! arbel->mailbox_in )
2988 goto err_mailbox_in;
2989 arbel->mailbox_out = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN );
2990 if ( ! arbel->mailbox_out )
2991 goto err_mailbox_out;
2992
2993 return arbel;
2994
2995 free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE );
2996 err_mailbox_out:
2997 free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE );
2998 err_mailbox_in:
2999 free ( arbel );
3000 err_arbel:
3001 return NULL;
3002 }
3003
3004 /**
3005 * Free Arbel device
3006 *
3007 * @v arbel Arbel device
3008 */
arbel_free(struct arbel * arbel)3009 static void arbel_free ( struct arbel *arbel ) {
3010
3011 ufree ( arbel->icm );
3012 ufree ( arbel->firmware_area );
3013 free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE );
3014 free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE );
3015 free ( arbel );
3016 }
3017
3018 /**
3019 * Probe PCI device
3020 *
3021 * @v pci PCI device
3022 * @v id PCI ID
3023 * @ret rc Return status code
3024 */
arbel_probe(struct pci_device * pci)3025 static int arbel_probe ( struct pci_device *pci ) {
3026 struct arbel *arbel;
3027 struct ib_device *ibdev;
3028 int i;
3029 int rc;
3030
3031 /* Allocate Arbel device */
3032 arbel = arbel_alloc();
3033 if ( ! arbel ) {
3034 rc = -ENOMEM;
3035 goto err_alloc;
3036 }
3037 pci_set_drvdata ( pci, arbel );
3038 arbel->pci = pci;
3039
3040 /* Fix up PCI device */
3041 adjust_pci_device ( pci );
3042
3043 /* Map PCI BARs */
3044 arbel->config = ioremap ( pci_bar_start ( pci, ARBEL_PCI_CONFIG_BAR ),
3045 ARBEL_PCI_CONFIG_BAR_SIZE );
3046 arbel->uar = ioremap ( ( pci_bar_start ( pci, ARBEL_PCI_UAR_BAR ) +
3047 ARBEL_PCI_UAR_IDX * ARBEL_PCI_UAR_SIZE ),
3048 ARBEL_PCI_UAR_SIZE );
3049
3050 /* Allocate Infiniband devices */
3051 for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) {
3052 ibdev = alloc_ibdev ( 0 );
3053 if ( ! ibdev ) {
3054 rc = -ENOMEM;
3055 goto err_alloc_ibdev;
3056 }
3057 arbel->ibdev[i] = ibdev;
3058 ibdev->op = &arbel_ib_operations;
3059 ibdev->dev = &pci->dev;
3060 ibdev->port = ( ARBEL_PORT_BASE + i );
3061 ib_set_drvdata ( ibdev, arbel );
3062 }
3063
3064 /* Reset device */
3065 arbel_reset ( arbel );
3066
3067 /* Start firmware */
3068 if ( ( rc = arbel_start_firmware ( arbel ) ) != 0 )
3069 goto err_start_firmware;
3070
3071 /* Get device limits */
3072 if ( ( rc = arbel_get_limits ( arbel ) ) != 0 )
3073 goto err_get_limits;
3074
3075 /* Start device */
3076 if ( ( rc = arbel_start ( arbel, 1 ) ) != 0 )
3077 goto err_start;
3078
3079 /* Initialise parameters using SMC */
3080 for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ )
3081 ib_smc_init ( arbel->ibdev[i], arbel_mad );
3082
3083 /* Register Infiniband devices */
3084 for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) {
3085 if ( ( rc = register_ibdev ( arbel->ibdev[i] ) ) != 0 ) {
3086 DBGC ( arbel, "Arbel %p port %d could not register IB "
3087 "device: %s\n", arbel,
3088 arbel->ibdev[i]->port, strerror ( rc ) );
3089 goto err_register_ibdev;
3090 }
3091 }
3092
3093 /* Leave device quiescent until opened */
3094 if ( arbel->open_count == 0 )
3095 arbel_stop ( arbel );
3096
3097 return 0;
3098
3099 i = ARBEL_NUM_PORTS;
3100 err_register_ibdev:
3101 for ( i-- ; i >= 0 ; i-- )
3102 unregister_ibdev ( arbel->ibdev[i] );
3103 arbel_stop ( arbel );
3104 err_start:
3105 err_get_limits:
3106 arbel_stop_firmware ( arbel );
3107 err_start_firmware:
3108 i = ARBEL_NUM_PORTS;
3109 err_alloc_ibdev:
3110 for ( i-- ; i >= 0 ; i-- )
3111 ibdev_put ( arbel->ibdev[i] );
3112 iounmap ( arbel->uar );
3113 iounmap ( arbel->config );
3114 arbel_free ( arbel );
3115 err_alloc:
3116 return rc;
3117 }
3118
3119 /**
3120 * Remove PCI device
3121 *
3122 * @v pci PCI device
3123 */
arbel_remove(struct pci_device * pci)3124 static void arbel_remove ( struct pci_device *pci ) {
3125 struct arbel *arbel = pci_get_drvdata ( pci );
3126 int i;
3127
3128 for ( i = ( ARBEL_NUM_PORTS - 1 ) ; i >= 0 ; i-- )
3129 unregister_ibdev ( arbel->ibdev[i] );
3130 for ( i = ( ARBEL_NUM_PORTS - 1 ) ; i >= 0 ; i-- )
3131 ibdev_put ( arbel->ibdev[i] );
3132 iounmap ( arbel->uar );
3133 iounmap ( arbel->config );
3134 arbel_free ( arbel );
3135 }
3136
3137 static struct pci_device_id arbel_nics[] = {
3138 PCI_ROM ( 0x15b3, 0x6282, "mt25218", "MT25218 HCA driver", 0 ),
3139 PCI_ROM ( 0x15b3, 0x6274, "mt25204", "MT25204 HCA driver", 0 ),
3140 };
3141
3142 struct pci_driver arbel_driver __pci_driver = {
3143 .ids = arbel_nics,
3144 .id_count = ( sizeof ( arbel_nics ) / sizeof ( arbel_nics[0] ) ),
3145 .probe = arbel_probe,
3146 .remove = arbel_remove,
3147 };
3148