[PATCH] PCI: removed unneeded .owner field from struct pci_driver
[linux-2.6.git] / drivers / infiniband / hw / mthca / mthca_main.c
1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  *
34  * $Id: mthca_main.c 1396 2004-12-28 04:10:27Z roland $
35  */
36
37 #include <linux/config.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/errno.h>
41 #include <linux/pci.h>
42 #include <linux/interrupt.h>
43
44 #include "mthca_dev.h"
45 #include "mthca_config_reg.h"
46 #include "mthca_cmd.h"
47 #include "mthca_profile.h"
48 #include "mthca_memfree.h"
49
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("Mellanox InfiniBand HCA low-level driver");
52 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_VERSION(DRV_VERSION);
54
55 #ifdef CONFIG_PCI_MSI
56
57 static int msi_x = 0;
58 module_param(msi_x, int, 0444);
59 MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
60
61 static int msi = 0;
62 module_param(msi, int, 0444);
63 MODULE_PARM_DESC(msi, "attempt to use MSI if nonzero");
64
65 #else /* CONFIG_PCI_MSI */
66
67 #define msi_x (0)
68 #define msi   (0)
69
70 #endif /* CONFIG_PCI_MSI */
71
72 static const char mthca_version[] __devinitdata =
73         DRV_NAME ": Mellanox InfiniBand HCA driver v"
74         DRV_VERSION " (" DRV_RELDATE ")\n";
75
76 static struct mthca_profile default_profile = {
77         .num_qp            = 1 << 16,
78         .rdb_per_qp        = 4,
79         .num_cq            = 1 << 16,
80         .num_mcg           = 1 << 13,
81         .num_mpt           = 1 << 17,
82         .num_mtt           = 1 << 20,
83         .num_udav          = 1 << 15,   /* Tavor only */
84         .fmr_reserved_mtts = 1 << 18,   /* Tavor only */
85         .uarc_size         = 1 << 18,   /* Arbel only */
86 };
87
88 static int __devinit mthca_tune_pci(struct mthca_dev *mdev)
89 {
90         int cap;
91         u16 val;
92
93         /* First try to max out Read Byte Count */
94         cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
95         if (cap) {
96                 if (pci_read_config_word(mdev->pdev, cap + PCI_X_CMD, &val)) {
97                         mthca_err(mdev, "Couldn't read PCI-X command register, "
98                                   "aborting.\n");
99                         return -ENODEV;
100                 }
101                 val = (val & ~PCI_X_CMD_MAX_READ) | (3 << 2);
102                 if (pci_write_config_word(mdev->pdev, cap + PCI_X_CMD, val)) {
103                         mthca_err(mdev, "Couldn't write PCI-X command register, "
104                                   "aborting.\n");
105                         return -ENODEV;
106                 }
107         } else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE))
108                 mthca_info(mdev, "No PCI-X capability, not setting RBC.\n");
109
110         cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);
111         if (cap) {
112                 if (pci_read_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, &val)) {
113                         mthca_err(mdev, "Couldn't read PCI Express device control "
114                                   "register, aborting.\n");
115                         return -ENODEV;
116                 }
117                 val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
118                 if (pci_write_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, val)) {
119                         mthca_err(mdev, "Couldn't write PCI Express device control "
120                                   "register, aborting.\n");
121                         return -ENODEV;
122                 }
123         } else if (mdev->mthca_flags & MTHCA_FLAG_PCIE)
124                 mthca_info(mdev, "No PCI Express capability, "
125                            "not setting Max Read Request Size.\n");
126
127         return 0;
128 }
129
130 static int __devinit mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim *dev_lim)
131 {
132         int err;
133         u8 status;
134
135         err = mthca_QUERY_DEV_LIM(mdev, dev_lim, &status);
136         if (err) {
137                 mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
138                 return err;
139         }
140         if (status) {
141                 mthca_err(mdev, "QUERY_DEV_LIM returned status 0x%02x, "
142                           "aborting.\n", status);
143                 return -EINVAL;
144         }
145         if (dev_lim->min_page_sz > PAGE_SIZE) {
146                 mthca_err(mdev, "HCA minimum page size of %d bigger than "
147                           "kernel PAGE_SIZE of %ld, aborting.\n",
148                           dev_lim->min_page_sz, PAGE_SIZE);
149                 return -ENODEV;
150         }
151         if (dev_lim->num_ports > MTHCA_MAX_PORTS) {
152                 mthca_err(mdev, "HCA has %d ports, but we only support %d, "
153                           "aborting.\n",
154                           dev_lim->num_ports, MTHCA_MAX_PORTS);
155                 return -ENODEV;
156         }
157
158         mdev->limits.num_ports          = dev_lim->num_ports;
159         mdev->limits.vl_cap             = dev_lim->max_vl;
160         mdev->limits.mtu_cap            = dev_lim->max_mtu;
161         mdev->limits.gid_table_len      = dev_lim->max_gids;
162         mdev->limits.pkey_table_len     = dev_lim->max_pkeys;
163         mdev->limits.local_ca_ack_delay = dev_lim->local_ca_ack_delay;
164         mdev->limits.max_sg             = dev_lim->max_sg;
165         mdev->limits.max_wqes           = dev_lim->max_qp_sz;
166         mdev->limits.max_qp_init_rdma   = dev_lim->max_requester_per_qp;
167         mdev->limits.reserved_qps       = dev_lim->reserved_qps;
168         mdev->limits.max_srq_wqes       = dev_lim->max_srq_sz;
169         mdev->limits.reserved_srqs      = dev_lim->reserved_srqs;
170         mdev->limits.reserved_eecs      = dev_lim->reserved_eecs;
171         mdev->limits.max_desc_sz        = dev_lim->max_desc_sz;
172         /*
173          * Subtract 1 from the limit because we need to allocate a
174          * spare CQE so the HCA HW can tell the difference between an
175          * empty CQ and a full CQ.
176          */
177         mdev->limits.max_cqes           = dev_lim->max_cq_sz - 1;
178         mdev->limits.reserved_cqs       = dev_lim->reserved_cqs;
179         mdev->limits.reserved_eqs       = dev_lim->reserved_eqs;
180         mdev->limits.reserved_mtts      = dev_lim->reserved_mtts;
181         mdev->limits.reserved_mrws      = dev_lim->reserved_mrws;
182         mdev->limits.reserved_uars      = dev_lim->reserved_uars;
183         mdev->limits.reserved_pds       = dev_lim->reserved_pds;
184         mdev->limits.port_width_cap     = dev_lim->max_port_width;
185         mdev->limits.page_size_cap      = ~(u32) (dev_lim->min_page_sz - 1);
186         mdev->limits.flags              = dev_lim->flags;
187
188         /* IB_DEVICE_RESIZE_MAX_WR not supported by driver.
189            May be doable since hardware supports it for SRQ.
190
191            IB_DEVICE_N_NOTIFY_CQ is supported by hardware but not by driver.
192
193            IB_DEVICE_SRQ_RESIZE is supported by hardware but SRQ is not
194            supported by driver. */
195         mdev->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT |
196                 IB_DEVICE_PORT_ACTIVE_EVENT |
197                 IB_DEVICE_SYS_IMAGE_GUID |
198                 IB_DEVICE_RC_RNR_NAK_GEN;
199
200         if (dev_lim->flags & DEV_LIM_FLAG_BAD_PKEY_CNTR)
201                 mdev->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
202
203         if (dev_lim->flags & DEV_LIM_FLAG_BAD_QKEY_CNTR)
204                 mdev->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
205
206         if (dev_lim->flags & DEV_LIM_FLAG_RAW_MULTI)
207                 mdev->device_cap_flags |= IB_DEVICE_RAW_MULTI;
208
209         if (dev_lim->flags & DEV_LIM_FLAG_AUTO_PATH_MIG)
210                 mdev->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
211
212         if (dev_lim->flags & DEV_LIM_FLAG_UD_AV_PORT_ENFORCE)
213                 mdev->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
214
215         if (dev_lim->flags & DEV_LIM_FLAG_SRQ)
216                 mdev->mthca_flags |= MTHCA_FLAG_SRQ;
217
218         return 0;
219 }
220
221 static int __devinit mthca_init_tavor(struct mthca_dev *mdev)
222 {
223         u8 status;
224         int err;
225         struct mthca_dev_lim        dev_lim;
226         struct mthca_profile        profile;
227         struct mthca_init_hca_param init_hca;
228
229         err = mthca_SYS_EN(mdev, &status);
230         if (err) {
231                 mthca_err(mdev, "SYS_EN command failed, aborting.\n");
232                 return err;
233         }
234         if (status) {
235                 mthca_err(mdev, "SYS_EN returned status 0x%02x, "
236                           "aborting.\n", status);
237                 return -EINVAL;
238         }
239
240         err = mthca_QUERY_FW(mdev, &status);
241         if (err) {
242                 mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
243                 goto err_disable;
244         }
245         if (status) {
246                 mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
247                           "aborting.\n", status);
248                 err = -EINVAL;
249                 goto err_disable;
250         }
251         err = mthca_QUERY_DDR(mdev, &status);
252         if (err) {
253                 mthca_err(mdev, "QUERY_DDR command failed, aborting.\n");
254                 goto err_disable;
255         }
256         if (status) {
257                 mthca_err(mdev, "QUERY_DDR returned status 0x%02x, "
258                           "aborting.\n", status);
259                 err = -EINVAL;
260                 goto err_disable;
261         }
262
263         err = mthca_dev_lim(mdev, &dev_lim);
264
265         profile = default_profile;
266         profile.num_uar   = dev_lim.uar_size / PAGE_SIZE;
267         profile.uarc_size = 0;
268         if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
269                 profile.num_srq = dev_lim.max_srqs;
270
271         err = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
272         if (err < 0)
273                 goto err_disable;
274
275         err = mthca_INIT_HCA(mdev, &init_hca, &status);
276         if (err) {
277                 mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
278                 goto err_disable;
279         }
280         if (status) {
281                 mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
282                           "aborting.\n", status);
283                 err = -EINVAL;
284                 goto err_disable;
285         }
286
287         return 0;
288
289 err_disable:
290         mthca_SYS_DIS(mdev, &status);
291
292         return err;
293 }
294
295 static int __devinit mthca_load_fw(struct mthca_dev *mdev)
296 {
297         u8 status;
298         int err;
299
300         /* FIXME: use HCA-attached memory for FW if present */
301
302         mdev->fw.arbel.fw_icm =
303                 mthca_alloc_icm(mdev, mdev->fw.arbel.fw_pages,
304                                 GFP_HIGHUSER | __GFP_NOWARN);
305         if (!mdev->fw.arbel.fw_icm) {
306                 mthca_err(mdev, "Couldn't allocate FW area, aborting.\n");
307                 return -ENOMEM;
308         }
309
310         err = mthca_MAP_FA(mdev, mdev->fw.arbel.fw_icm, &status);
311         if (err) {
312                 mthca_err(mdev, "MAP_FA command failed, aborting.\n");
313                 goto err_free;
314         }
315         if (status) {
316                 mthca_err(mdev, "MAP_FA returned status 0x%02x, aborting.\n", status);
317                 err = -EINVAL;
318                 goto err_free;
319         }
320         err = mthca_RUN_FW(mdev, &status);
321         if (err) {
322                 mthca_err(mdev, "RUN_FW command failed, aborting.\n");
323                 goto err_unmap_fa;
324         }
325         if (status) {
326                 mthca_err(mdev, "RUN_FW returned status 0x%02x, aborting.\n", status);
327                 err = -EINVAL;
328                 goto err_unmap_fa;
329         }
330
331         return 0;
332
333 err_unmap_fa:
334         mthca_UNMAP_FA(mdev, &status);
335
336 err_free:
337         mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
338         return err;
339 }
340
341 static int __devinit mthca_init_icm(struct mthca_dev *mdev,
342                                     struct mthca_dev_lim *dev_lim,
343                                     struct mthca_init_hca_param *init_hca,
344                                     u64 icm_size)
345 {
346         u64 aux_pages;
347         u8 status;
348         int err;
349
350         err = mthca_SET_ICM_SIZE(mdev, icm_size, &aux_pages, &status);
351         if (err) {
352                 mthca_err(mdev, "SET_ICM_SIZE command failed, aborting.\n");
353                 return err;
354         }
355         if (status) {
356                 mthca_err(mdev, "SET_ICM_SIZE returned status 0x%02x, "
357                           "aborting.\n", status);
358                 return -EINVAL;
359         }
360
361         mthca_dbg(mdev, "%lld KB of HCA context requires %lld KB aux memory.\n",
362                   (unsigned long long) icm_size >> 10,
363                   (unsigned long long) aux_pages << 2);
364
365         mdev->fw.arbel.aux_icm = mthca_alloc_icm(mdev, aux_pages,
366                                                  GFP_HIGHUSER | __GFP_NOWARN);
367         if (!mdev->fw.arbel.aux_icm) {
368                 mthca_err(mdev, "Couldn't allocate aux memory, aborting.\n");
369                 return -ENOMEM;
370         }
371
372         err = mthca_MAP_ICM_AUX(mdev, mdev->fw.arbel.aux_icm, &status);
373         if (err) {
374                 mthca_err(mdev, "MAP_ICM_AUX command failed, aborting.\n");
375                 goto err_free_aux;
376         }
377         if (status) {
378                 mthca_err(mdev, "MAP_ICM_AUX returned status 0x%02x, aborting.\n", status);
379                 err = -EINVAL;
380                 goto err_free_aux;
381         }
382
383         err = mthca_map_eq_icm(mdev, init_hca->eqc_base);
384         if (err) {
385                 mthca_err(mdev, "Failed to map EQ context memory, aborting.\n");
386                 goto err_unmap_aux;
387         }
388
389         mdev->mr_table.mtt_table = mthca_alloc_icm_table(mdev, init_hca->mtt_base,
390                                                          MTHCA_MTT_SEG_SIZE,
391                                                          mdev->limits.num_mtt_segs,
392                                                          mdev->limits.reserved_mtts, 1);
393         if (!mdev->mr_table.mtt_table) {
394                 mthca_err(mdev, "Failed to map MTT context memory, aborting.\n");
395                 err = -ENOMEM;
396                 goto err_unmap_eq;
397         }
398
399         mdev->mr_table.mpt_table = mthca_alloc_icm_table(mdev, init_hca->mpt_base,
400                                                          dev_lim->mpt_entry_sz,
401                                                          mdev->limits.num_mpts,
402                                                          mdev->limits.reserved_mrws, 1);
403         if (!mdev->mr_table.mpt_table) {
404                 mthca_err(mdev, "Failed to map MPT context memory, aborting.\n");
405                 err = -ENOMEM;
406                 goto err_unmap_mtt;
407         }
408
409         mdev->qp_table.qp_table = mthca_alloc_icm_table(mdev, init_hca->qpc_base,
410                                                         dev_lim->qpc_entry_sz,
411                                                         mdev->limits.num_qps,
412                                                         mdev->limits.reserved_qps, 0);
413         if (!mdev->qp_table.qp_table) {
414                 mthca_err(mdev, "Failed to map QP context memory, aborting.\n");
415                 err = -ENOMEM;
416                 goto err_unmap_mpt;
417         }
418
419         mdev->qp_table.eqp_table = mthca_alloc_icm_table(mdev, init_hca->eqpc_base,
420                                                          dev_lim->eqpc_entry_sz,
421                                                          mdev->limits.num_qps,
422                                                          mdev->limits.reserved_qps, 0);
423         if (!mdev->qp_table.eqp_table) {
424                 mthca_err(mdev, "Failed to map EQP context memory, aborting.\n");
425                 err = -ENOMEM;
426                 goto err_unmap_qp;
427         }
428
429         mdev->qp_table.rdb_table = mthca_alloc_icm_table(mdev, init_hca->rdb_base,
430                                                          MTHCA_RDB_ENTRY_SIZE,
431                                                          mdev->limits.num_qps <<
432                                                          mdev->qp_table.rdb_shift,
433                                                          0, 0);
434         if (!mdev->qp_table.rdb_table) {
435                 mthca_err(mdev, "Failed to map RDB context memory, aborting\n");
436                 err = -ENOMEM;
437                 goto err_unmap_eqp;
438         }
439
440        mdev->cq_table.table = mthca_alloc_icm_table(mdev, init_hca->cqc_base,
441                                                     dev_lim->cqc_entry_sz,
442                                                     mdev->limits.num_cqs,
443                                                     mdev->limits.reserved_cqs, 0);
444         if (!mdev->cq_table.table) {
445                 mthca_err(mdev, "Failed to map CQ context memory, aborting.\n");
446                 err = -ENOMEM;
447                 goto err_unmap_rdb;
448         }
449
450         if (mdev->mthca_flags & MTHCA_FLAG_SRQ) {
451                 mdev->srq_table.table =
452                         mthca_alloc_icm_table(mdev, init_hca->srqc_base,
453                                               dev_lim->srq_entry_sz,
454                                               mdev->limits.num_srqs,
455                                               mdev->limits.reserved_srqs, 0);
456                 if (!mdev->srq_table.table) {
457                         mthca_err(mdev, "Failed to map SRQ context memory, "
458                                   "aborting.\n");
459                         err = -ENOMEM;
460                         goto err_unmap_cq;
461                 }
462         }
463
464         /*
465          * It's not strictly required, but for simplicity just map the
466          * whole multicast group table now.  The table isn't very big
467          * and it's a lot easier than trying to track ref counts.
468          */
469         mdev->mcg_table.table = mthca_alloc_icm_table(mdev, init_hca->mc_base,
470                                                       MTHCA_MGM_ENTRY_SIZE,
471                                                       mdev->limits.num_mgms +
472                                                       mdev->limits.num_amgms,
473                                                       mdev->limits.num_mgms +
474                                                       mdev->limits.num_amgms,
475                                                       0);
476         if (!mdev->mcg_table.table) {
477                 mthca_err(mdev, "Failed to map MCG context memory, aborting.\n");
478                 err = -ENOMEM;
479                 goto err_unmap_srq;
480         }
481
482         return 0;
483
484 err_unmap_srq:
485         if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
486                 mthca_free_icm_table(mdev, mdev->srq_table.table);
487
488 err_unmap_cq:
489         mthca_free_icm_table(mdev, mdev->cq_table.table);
490
491 err_unmap_rdb:
492         mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
493
494 err_unmap_eqp:
495         mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
496
497 err_unmap_qp:
498         mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
499
500 err_unmap_mpt:
501         mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
502
503 err_unmap_mtt:
504         mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
505
506 err_unmap_eq:
507         mthca_unmap_eq_icm(mdev);
508
509 err_unmap_aux:
510         mthca_UNMAP_ICM_AUX(mdev, &status);
511
512 err_free_aux:
513         mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
514
515         return err;
516 }
517
518 static void mthca_free_icms(struct mthca_dev *mdev)
519 {
520         u8 status;
521
522         mthca_free_icm_table(mdev, mdev->mcg_table.table);
523         if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
524                 mthca_free_icm_table(mdev, mdev->srq_table.table);
525         mthca_free_icm_table(mdev, mdev->cq_table.table);
526         mthca_free_icm_table(mdev, mdev->qp_table.rdb_table);
527         mthca_free_icm_table(mdev, mdev->qp_table.eqp_table);
528         mthca_free_icm_table(mdev, mdev->qp_table.qp_table);
529         mthca_free_icm_table(mdev, mdev->mr_table.mpt_table);
530         mthca_free_icm_table(mdev, mdev->mr_table.mtt_table);
531         mthca_unmap_eq_icm(mdev);
532
533         mthca_UNMAP_ICM_AUX(mdev, &status);
534         mthca_free_icm(mdev, mdev->fw.arbel.aux_icm);
535 }
536
537 static int __devinit mthca_init_arbel(struct mthca_dev *mdev)
538 {
539         struct mthca_dev_lim        dev_lim;
540         struct mthca_profile        profile;
541         struct mthca_init_hca_param init_hca;
542         u64 icm_size;
543         u8 status;
544         int err;
545
546         err = mthca_QUERY_FW(mdev, &status);
547         if (err) {
548                 mthca_err(mdev, "QUERY_FW command failed, aborting.\n");
549                 return err;
550         }
551         if (status) {
552                 mthca_err(mdev, "QUERY_FW returned status 0x%02x, "
553                           "aborting.\n", status);
554                 return -EINVAL;
555         }
556
557         err = mthca_ENABLE_LAM(mdev, &status);
558         if (err) {
559                 mthca_err(mdev, "ENABLE_LAM command failed, aborting.\n");
560                 return err;
561         }
562         if (status == MTHCA_CMD_STAT_LAM_NOT_PRE) {
563                 mthca_dbg(mdev, "No HCA-attached memory (running in MemFree mode)\n");
564                 mdev->mthca_flags |= MTHCA_FLAG_NO_LAM;
565         } else if (status) {
566                 mthca_err(mdev, "ENABLE_LAM returned status 0x%02x, "
567                           "aborting.\n", status);
568                 return -EINVAL;
569         }
570
571         err = mthca_load_fw(mdev);
572         if (err) {
573                 mthca_err(mdev, "Failed to start FW, aborting.\n");
574                 goto err_disable;
575         }
576
577         err = mthca_dev_lim(mdev, &dev_lim);
578         if (err) {
579                 mthca_err(mdev, "QUERY_DEV_LIM command failed, aborting.\n");
580                 goto err_stop_fw;
581         }
582
583         profile = default_profile;
584         profile.num_uar  = dev_lim.uar_size / PAGE_SIZE;
585         profile.num_udav = 0;
586         if (mdev->mthca_flags & MTHCA_FLAG_SRQ)
587                 profile.num_srq = dev_lim.max_srqs;
588
589         icm_size = mthca_make_profile(mdev, &profile, &dev_lim, &init_hca);
590         if ((int) icm_size < 0) {
591                 err = icm_size;
592                 goto err_stop_fw;
593         }
594
595         err = mthca_init_icm(mdev, &dev_lim, &init_hca, icm_size);
596         if (err)
597                 goto err_stop_fw;
598
599         err = mthca_INIT_HCA(mdev, &init_hca, &status);
600         if (err) {
601                 mthca_err(mdev, "INIT_HCA command failed, aborting.\n");
602                 goto err_free_icm;
603         }
604         if (status) {
605                 mthca_err(mdev, "INIT_HCA returned status 0x%02x, "
606                           "aborting.\n", status);
607                 err = -EINVAL;
608                 goto err_free_icm;
609         }
610
611         return 0;
612
613 err_free_icm:
614         mthca_free_icms(mdev);
615
616 err_stop_fw:
617         mthca_UNMAP_FA(mdev, &status);
618         mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
619
620 err_disable:
621         if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
622                 mthca_DISABLE_LAM(mdev, &status);
623
624         return err;
625 }
626
627 static void mthca_close_hca(struct mthca_dev *mdev)
628 {
629         u8 status;
630
631         mthca_CLOSE_HCA(mdev, 0, &status);
632
633         if (mthca_is_memfree(mdev)) {
634                 mthca_free_icms(mdev);
635
636                 mthca_UNMAP_FA(mdev, &status);
637                 mthca_free_icm(mdev, mdev->fw.arbel.fw_icm);
638
639                 if (!(mdev->mthca_flags & MTHCA_FLAG_NO_LAM))
640                         mthca_DISABLE_LAM(mdev, &status);
641         } else
642                 mthca_SYS_DIS(mdev, &status);
643 }
644
645 static int __devinit mthca_init_hca(struct mthca_dev *mdev)
646 {
647         u8 status;
648         int err;
649         struct mthca_adapter adapter;
650
651         if (mthca_is_memfree(mdev))
652                 err = mthca_init_arbel(mdev);
653         else
654                 err = mthca_init_tavor(mdev);
655
656         if (err)
657                 return err;
658
659         err = mthca_QUERY_ADAPTER(mdev, &adapter, &status);
660         if (err) {
661                 mthca_err(mdev, "QUERY_ADAPTER command failed, aborting.\n");
662                 goto err_close;
663         }
664         if (status) {
665                 mthca_err(mdev, "QUERY_ADAPTER returned status 0x%02x, "
666                           "aborting.\n", status);
667                 err = -EINVAL;
668                 goto err_close;
669         }
670
671         mdev->eq_table.inta_pin = adapter.inta_pin;
672         mdev->rev_id            = adapter.revision_id;
673         memcpy(mdev->board_id, adapter.board_id, sizeof mdev->board_id);
674
675         return 0;
676
677 err_close:
678         mthca_close_hca(mdev);
679         return err;
680 }
681
682 static int __devinit mthca_setup_hca(struct mthca_dev *dev)
683 {
684         int err;
685         u8 status;
686
687         MTHCA_INIT_DOORBELL_LOCK(&dev->doorbell_lock);
688
689         err = mthca_init_uar_table(dev);
690         if (err) {
691                 mthca_err(dev, "Failed to initialize "
692                           "user access region table, aborting.\n");
693                 return err;
694         }
695
696         err = mthca_uar_alloc(dev, &dev->driver_uar);
697         if (err) {
698                 mthca_err(dev, "Failed to allocate driver access region, "
699                           "aborting.\n");
700                 goto err_uar_table_free;
701         }
702
703         dev->kar = ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
704         if (!dev->kar) {
705                 mthca_err(dev, "Couldn't map kernel access region, "
706                           "aborting.\n");
707                 err = -ENOMEM;
708                 goto err_uar_free;
709         }
710
711         err = mthca_init_pd_table(dev);
712         if (err) {
713                 mthca_err(dev, "Failed to initialize "
714                           "protection domain table, aborting.\n");
715                 goto err_kar_unmap;
716         }
717
718         err = mthca_init_mr_table(dev);
719         if (err) {
720                 mthca_err(dev, "Failed to initialize "
721                           "memory region table, aborting.\n");
722                 goto err_pd_table_free;
723         }
724
725         err = mthca_pd_alloc(dev, 1, &dev->driver_pd);
726         if (err) {
727                 mthca_err(dev, "Failed to create driver PD, "
728                           "aborting.\n");
729                 goto err_mr_table_free;
730         }
731
732         err = mthca_init_eq_table(dev);
733         if (err) {
734                 mthca_err(dev, "Failed to initialize "
735                           "event queue table, aborting.\n");
736                 goto err_pd_free;
737         }
738
739         err = mthca_cmd_use_events(dev);
740         if (err) {
741                 mthca_err(dev, "Failed to switch to event-driven "
742                           "firmware commands, aborting.\n");
743                 goto err_eq_table_free;
744         }
745
746         err = mthca_NOP(dev, &status);
747         if (err || status) {
748                 mthca_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting.\n",
749                           dev->mthca_flags & MTHCA_FLAG_MSI_X ?
750                           dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector :
751                           dev->pdev->irq);
752                 if (dev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X))
753                         mthca_err(dev, "Try again with MSI/MSI-X disabled.\n");
754                 else
755                         mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n");
756
757                 goto err_cmd_poll;
758         }
759
760         mthca_dbg(dev, "NOP command IRQ test passed\n");
761
762         err = mthca_init_cq_table(dev);
763         if (err) {
764                 mthca_err(dev, "Failed to initialize "
765                           "completion queue table, aborting.\n");
766                 goto err_cmd_poll;
767         }
768
769         err = mthca_init_srq_table(dev);
770         if (err) {
771                 mthca_err(dev, "Failed to initialize "
772                           "shared receive queue table, aborting.\n");
773                 goto err_cq_table_free;
774         }
775
776         err = mthca_init_qp_table(dev);
777         if (err) {
778                 mthca_err(dev, "Failed to initialize "
779                           "queue pair table, aborting.\n");
780                 goto err_srq_table_free;
781         }
782
783         err = mthca_init_av_table(dev);
784         if (err) {
785                 mthca_err(dev, "Failed to initialize "
786                           "address vector table, aborting.\n");
787                 goto err_qp_table_free;
788         }
789
790         err = mthca_init_mcg_table(dev);
791         if (err) {
792                 mthca_err(dev, "Failed to initialize "
793                           "multicast group table, aborting.\n");
794                 goto err_av_table_free;
795         }
796
797         return 0;
798
799 err_av_table_free:
800         mthca_cleanup_av_table(dev);
801
802 err_qp_table_free:
803         mthca_cleanup_qp_table(dev);
804
805 err_srq_table_free:
806         mthca_cleanup_srq_table(dev);
807
808 err_cq_table_free:
809         mthca_cleanup_cq_table(dev);
810
811 err_cmd_poll:
812         mthca_cmd_use_polling(dev);
813
814 err_eq_table_free:
815         mthca_cleanup_eq_table(dev);
816
817 err_pd_free:
818         mthca_pd_free(dev, &dev->driver_pd);
819
820 err_mr_table_free:
821         mthca_cleanup_mr_table(dev);
822
823 err_pd_table_free:
824         mthca_cleanup_pd_table(dev);
825
826 err_kar_unmap:
827         iounmap(dev->kar);
828
829 err_uar_free:
830         mthca_uar_free(dev, &dev->driver_uar);
831
832 err_uar_table_free:
833         mthca_cleanup_uar_table(dev);
834         return err;
835 }
836
837 static int __devinit mthca_request_regions(struct pci_dev *pdev,
838                                            int ddr_hidden)
839 {
840         int err;
841
842         /*
843          * We can't just use pci_request_regions() because the MSI-X
844          * table is right in the middle of the first BAR.  If we did
845          * pci_request_region and grab all of the first BAR, then
846          * setting up MSI-X would fail, since the PCI core wants to do
847          * request_mem_region on the MSI-X vector table.
848          *
849          * So just request what we need right now, and request any
850          * other regions we need when setting up EQs.
851          */
852         if (!request_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
853                                 MTHCA_HCR_SIZE, DRV_NAME))
854                 return -EBUSY;
855
856         err = pci_request_region(pdev, 2, DRV_NAME);
857         if (err)
858                 goto err_bar2_failed;
859
860         if (!ddr_hidden) {
861                 err = pci_request_region(pdev, 4, DRV_NAME);
862                 if (err)
863                         goto err_bar4_failed;
864         }
865
866         return 0;
867
868 err_bar4_failed:
869         pci_release_region(pdev, 2);
870
871 err_bar2_failed:
872         release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
873                            MTHCA_HCR_SIZE);
874
875         return err;
876 }
877
878 static void mthca_release_regions(struct pci_dev *pdev,
879                                   int ddr_hidden)
880 {
881         if (!ddr_hidden)
882                 pci_release_region(pdev, 4);
883
884         pci_release_region(pdev, 2);
885
886         release_mem_region(pci_resource_start(pdev, 0) + MTHCA_HCR_BASE,
887                            MTHCA_HCR_SIZE);
888 }
889
890 static int __devinit mthca_enable_msi_x(struct mthca_dev *mdev)
891 {
892         struct msix_entry entries[3];
893         int err;
894
895         entries[0].entry = 0;
896         entries[1].entry = 1;
897         entries[2].entry = 2;
898
899         err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries));
900         if (err) {
901                 if (err > 0)
902                         mthca_info(mdev, "Only %d MSI-X vectors available, "
903                                    "not using MSI-X\n", err);
904                 return err;
905         }
906
907         mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector;
908         mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;
909         mdev->eq_table.eq[MTHCA_EQ_CMD  ].msi_x_vector = entries[2].vector;
910
911         return 0;
912 }
913
914 /* Types of supported HCA */
915 enum {
916         TAVOR,                  /* MT23108                        */
917         ARBEL_COMPAT,           /* MT25208 in Tavor compat mode   */
918         ARBEL_NATIVE,           /* MT25208 with extended features */
919         SINAI                   /* MT25204 */
920 };
921
922 #define MTHCA_FW_VER(major, minor, subminor) \
923         (((u64) (major) << 32) | ((u64) (minor) << 16) | (u64) (subminor))
924
925 static struct {
926         u64 latest_fw;
927         int is_memfree;
928         int is_pcie;
929 } mthca_hca_table[] = {
930         [TAVOR]        = { .latest_fw = MTHCA_FW_VER(3, 3, 3), .is_memfree = 0, .is_pcie = 0 },
931         [ARBEL_COMPAT] = { .latest_fw = MTHCA_FW_VER(4, 7, 0), .is_memfree = 0, .is_pcie = 1 },
932         [ARBEL_NATIVE] = { .latest_fw = MTHCA_FW_VER(5, 1, 0), .is_memfree = 1, .is_pcie = 1 },
933         [SINAI]        = { .latest_fw = MTHCA_FW_VER(1, 0, 1), .is_memfree = 1, .is_pcie = 1 }
934 };
935
936 static int __devinit mthca_init_one(struct pci_dev *pdev,
937                                     const struct pci_device_id *id)
938 {
939         static int mthca_version_printed = 0;
940         int ddr_hidden = 0;
941         int err;
942         struct mthca_dev *mdev;
943
944         if (!mthca_version_printed) {
945                 printk(KERN_INFO "%s", mthca_version);
946                 ++mthca_version_printed;
947         }
948
949         printk(KERN_INFO PFX "Initializing %s\n",
950                pci_name(pdev));
951
952         if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) {
953                 printk(KERN_ERR PFX "%s has invalid driver data %lx\n",
954                        pci_name(pdev), id->driver_data);
955                 return -ENODEV;
956         }
957
958         err = pci_enable_device(pdev);
959         if (err) {
960                 dev_err(&pdev->dev, "Cannot enable PCI device, "
961                         "aborting.\n");
962                 return err;
963         }
964
965         /*
966          * Check for BARs.  We expect 0: 1MB, 2: 8MB, 4: DDR (may not
967          * be present)
968          */
969         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
970             pci_resource_len(pdev, 0) != 1 << 20) {
971                 dev_err(&pdev->dev, "Missing DCS, aborting.\n");
972                 err = -ENODEV;
973                 goto err_disable_pdev;
974         }
975         if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM) ||
976             pci_resource_len(pdev, 2) != 1 << 23) {
977                 dev_err(&pdev->dev, "Missing UAR, aborting.\n");
978                 err = -ENODEV;
979                 goto err_disable_pdev;
980         }
981         if (!(pci_resource_flags(pdev, 4) & IORESOURCE_MEM))
982                 ddr_hidden = 1;
983
984         err = mthca_request_regions(pdev, ddr_hidden);
985         if (err) {
986                 dev_err(&pdev->dev, "Cannot obtain PCI resources, "
987                         "aborting.\n");
988                 goto err_disable_pdev;
989         }
990
991         pci_set_master(pdev);
992
993         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
994         if (err) {
995                 dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
996                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
997                 if (err) {
998                         dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
999                         goto err_free_res;
1000                 }
1001         }
1002         err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1003         if (err) {
1004                 dev_warn(&pdev->dev, "Warning: couldn't set 64-bit "
1005                          "consistent PCI DMA mask.\n");
1006                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1007                 if (err) {
1008                         dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
1009                                 "aborting.\n");
1010                         goto err_free_res;
1011                 }
1012         }
1013
1014         mdev = (struct mthca_dev *) ib_alloc_device(sizeof *mdev);
1015         if (!mdev) {
1016                 dev_err(&pdev->dev, "Device struct alloc failed, "
1017                         "aborting.\n");
1018                 err = -ENOMEM;
1019                 goto err_free_res;
1020         }
1021
1022         mdev->pdev = pdev;
1023
1024         if (ddr_hidden)
1025                 mdev->mthca_flags |= MTHCA_FLAG_DDR_HIDDEN;
1026         if (mthca_hca_table[id->driver_data].is_memfree)
1027                 mdev->mthca_flags |= MTHCA_FLAG_MEMFREE;
1028         if (mthca_hca_table[id->driver_data].is_pcie)
1029                 mdev->mthca_flags |= MTHCA_FLAG_PCIE;
1030
1031         /*
1032          * Now reset the HCA before we touch the PCI capabilities or
1033          * attempt a firmware command, since a boot ROM may have left
1034          * the HCA in an undefined state.
1035          */
1036         err = mthca_reset(mdev);
1037         if (err) {
1038                 mthca_err(mdev, "Failed to reset HCA, aborting.\n");
1039                 goto err_free_dev;
1040         }
1041
1042         if (msi_x && !mthca_enable_msi_x(mdev))
1043                 mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
1044         if (msi && !(mdev->mthca_flags & MTHCA_FLAG_MSI_X) &&
1045             !pci_enable_msi(pdev))
1046                 mdev->mthca_flags |= MTHCA_FLAG_MSI;
1047
1048         if (mthca_cmd_init(mdev)) {
1049                 mthca_err(mdev, "Failed to init command interface, aborting.\n");
1050                 goto err_free_dev;
1051         }
1052
1053         err = mthca_tune_pci(mdev);
1054         if (err)
1055                 goto err_cmd;
1056
1057         err = mthca_init_hca(mdev);
1058         if (err)
1059                 goto err_cmd;
1060
1061         if (mdev->fw_ver < mthca_hca_table[id->driver_data].latest_fw) {
1062                 mthca_warn(mdev, "HCA FW version %d.%d.%d is old (%d.%d.%d is current).\n",
1063                            (int) (mdev->fw_ver >> 32), (int) (mdev->fw_ver >> 16) & 0xffff,
1064                            (int) (mdev->fw_ver & 0xffff),
1065                            (int) (mthca_hca_table[id->driver_data].latest_fw >> 32),
1066                            (int) (mthca_hca_table[id->driver_data].latest_fw >> 16) & 0xffff,
1067                            (int) (mthca_hca_table[id->driver_data].latest_fw & 0xffff));
1068                 mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n");
1069         }
1070
1071         err = mthca_setup_hca(mdev);
1072         if (err)
1073                 goto err_close;
1074
1075         err = mthca_register_device(mdev);
1076         if (err)
1077                 goto err_cleanup;
1078
1079         err = mthca_create_agents(mdev);
1080         if (err)
1081                 goto err_unregister;
1082
1083         pci_set_drvdata(pdev, mdev);
1084
1085         return 0;
1086
1087 err_unregister:
1088         mthca_unregister_device(mdev);
1089
1090 err_cleanup:
1091         mthca_cleanup_mcg_table(mdev);
1092         mthca_cleanup_av_table(mdev);
1093         mthca_cleanup_qp_table(mdev);
1094         mthca_cleanup_srq_table(mdev);
1095         mthca_cleanup_cq_table(mdev);
1096         mthca_cmd_use_polling(mdev);
1097         mthca_cleanup_eq_table(mdev);
1098
1099         mthca_pd_free(mdev, &mdev->driver_pd);
1100
1101         mthca_cleanup_mr_table(mdev);
1102         mthca_cleanup_pd_table(mdev);
1103         mthca_cleanup_uar_table(mdev);
1104
1105 err_close:
1106         mthca_close_hca(mdev);
1107
1108 err_cmd:
1109         mthca_cmd_cleanup(mdev);
1110
1111 err_free_dev:
1112         if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
1113                 pci_disable_msix(pdev);
1114         if (mdev->mthca_flags & MTHCA_FLAG_MSI)
1115                 pci_disable_msi(pdev);
1116
1117         ib_dealloc_device(&mdev->ib_dev);
1118
1119 err_free_res:
1120         mthca_release_regions(pdev, ddr_hidden);
1121
1122 err_disable_pdev:
1123         pci_disable_device(pdev);
1124         pci_set_drvdata(pdev, NULL);
1125         return err;
1126 }
1127
1128 static void __devexit mthca_remove_one(struct pci_dev *pdev)
1129 {
1130         struct mthca_dev *mdev = pci_get_drvdata(pdev);
1131         u8 status;
1132         int p;
1133
1134         if (mdev) {
1135                 mthca_free_agents(mdev);
1136                 mthca_unregister_device(mdev);
1137
1138                 for (p = 1; p <= mdev->limits.num_ports; ++p)
1139                         mthca_CLOSE_IB(mdev, p, &status);
1140
1141                 mthca_cleanup_mcg_table(mdev);
1142                 mthca_cleanup_av_table(mdev);
1143                 mthca_cleanup_qp_table(mdev);
1144                 mthca_cleanup_srq_table(mdev);
1145                 mthca_cleanup_cq_table(mdev);
1146                 mthca_cmd_use_polling(mdev);
1147                 mthca_cleanup_eq_table(mdev);
1148
1149                 mthca_pd_free(mdev, &mdev->driver_pd);
1150
1151                 mthca_cleanup_mr_table(mdev);
1152                 mthca_cleanup_pd_table(mdev);
1153
1154                 iounmap(mdev->kar);
1155                 mthca_uar_free(mdev, &mdev->driver_uar);
1156                 mthca_cleanup_uar_table(mdev);
1157                 mthca_close_hca(mdev);
1158                 mthca_cmd_cleanup(mdev);
1159
1160                 if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
1161                         pci_disable_msix(pdev);
1162                 if (mdev->mthca_flags & MTHCA_FLAG_MSI)
1163                         pci_disable_msi(pdev);
1164
1165                 ib_dealloc_device(&mdev->ib_dev);
1166                 mthca_release_regions(pdev, mdev->mthca_flags &
1167                                       MTHCA_FLAG_DDR_HIDDEN);
1168                 pci_disable_device(pdev);
1169                 pci_set_drvdata(pdev, NULL);
1170         }
1171 }
1172
1173 static struct pci_device_id mthca_pci_table[] = {
1174         { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR),
1175           .driver_data = TAVOR },
1176         { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_TAVOR),
1177           .driver_data = TAVOR },
1178         { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
1179           .driver_data = ARBEL_COMPAT },
1180         { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT),
1181           .driver_data = ARBEL_COMPAT },
1182         { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_ARBEL),
1183           .driver_data = ARBEL_NATIVE },
1184         { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_ARBEL),
1185           .driver_data = ARBEL_NATIVE },
1186         { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI),
1187           .driver_data = SINAI },
1188         { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI),
1189           .driver_data = SINAI },
1190         { PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
1191           .driver_data = SINAI },
1192         { PCI_DEVICE(PCI_VENDOR_ID_TOPSPIN, PCI_DEVICE_ID_MELLANOX_SINAI_OLD),
1193           .driver_data = SINAI },
1194         { 0, }
1195 };
1196
1197 MODULE_DEVICE_TABLE(pci, mthca_pci_table);
1198
1199 static struct pci_driver mthca_driver = {
1200         .name           = DRV_NAME,
1201         .id_table       = mthca_pci_table,
1202         .probe          = mthca_init_one,
1203         .remove         = __devexit_p(mthca_remove_one)
1204 };
1205
1206 static int __init mthca_init(void)
1207 {
1208         int ret;
1209
1210         ret = pci_register_driver(&mthca_driver);
1211         return ret < 0 ? ret : 0;
1212 }
1213
1214 static void __exit mthca_cleanup(void)
1215 {
1216         pci_unregister_driver(&mthca_driver);
1217 }
1218
1219 module_init(mthca_init);
1220 module_exit(mthca_cleanup);