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fab97220 HS |
1 | /* |
2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER | |
3 | * | |
4 | * PD functions | |
5 | * | |
6 | * Authors: Christoph Raisch <raisch@de.ibm.com> | |
7 | * | |
8 | * Copyright (c) 2005 IBM Corporation | |
9 | * | |
10 | * All rights reserved. | |
11 | * | |
12 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB | |
13 | * BSD. | |
14 | * | |
15 | * OpenIB BSD License | |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted provided that the following conditions are met: | |
19 | * | |
20 | * Redistributions of source code must retain the above copyright notice, this | |
21 | * list of conditions and the following disclaimer. | |
22 | * | |
23 | * Redistributions in binary form must reproduce the above copyright notice, | |
24 | * this list of conditions and the following disclaimer in the documentation | |
25 | * and/or other materials | |
26 | * provided with the distribution. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
29 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
32 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
33 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
34 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
35 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
36 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
37 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
38 | * POSSIBILITY OF SUCH DAMAGE. | |
39 | */ | |
40 | ||
5a0e3ad6 TH |
41 | #include <linux/slab.h> |
42 | ||
fab97220 HS |
43 | #include "ehca_tools.h" |
44 | #include "ehca_iverbs.h" | |
45 | ||
46 | static struct kmem_cache *pd_cache; | |
47 | ||
48 | struct ib_pd *ehca_alloc_pd(struct ib_device *device, | |
49 | struct ib_ucontext *context, struct ib_udata *udata) | |
50 | { | |
51 | struct ehca_pd *pd; | |
e2f81daf | 52 | int i; |
fab97220 | 53 | |
c3762229 | 54 | pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL); |
fab97220 HS |
55 | if (!pd) { |
56 | ehca_err(device, "device=%p context=%p out of memory", | |
57 | device, context); | |
58 | return ERR_PTR(-ENOMEM); | |
59 | } | |
60 | ||
e2f81daf SR |
61 | for (i = 0; i < 2; i++) { |
62 | INIT_LIST_HEAD(&pd->free[i]); | |
63 | INIT_LIST_HEAD(&pd->full[i]); | |
64 | } | |
65 | mutex_init(&pd->lock); | |
fab97220 HS |
66 | |
67 | /* | |
68 | * Kernel PD: when device = -1, 0 | |
69 | * User PD: when context != -1 | |
70 | */ | |
71 | if (!context) { | |
72 | /* | |
73 | * Kernel PDs after init reuses always | |
74 | * the one created in ehca_shca_reopen() | |
75 | */ | |
76 | struct ehca_shca *shca = container_of(device, struct ehca_shca, | |
77 | ib_device); | |
78 | pd->fw_pd.value = shca->pd->fw_pd.value; | |
79 | } else | |
80 | pd->fw_pd.value = (u64)pd; | |
81 | ||
82 | return &pd->ib_pd; | |
83 | } | |
84 | ||
85 | int ehca_dealloc_pd(struct ib_pd *pd) | |
86 | { | |
fab97220 | 87 | struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd); |
e2f81daf | 88 | int i, leftovers = 0; |
e2f81daf | 89 | struct ipz_small_queue_page *page, *tmp; |
fab97220 | 90 | |
e2f81daf SR |
91 | for (i = 0; i < 2; i++) { |
92 | list_splice(&my_pd->full[i], &my_pd->free[i]); | |
93 | list_for_each_entry_safe(page, tmp, &my_pd->free[i], list) { | |
94 | leftovers = 1; | |
95 | free_page(page->page); | |
96 | kmem_cache_free(small_qp_cache, page); | |
97 | } | |
98 | } | |
99 | ||
100 | if (leftovers) | |
101 | ehca_warn(pd->device, | |
102 | "Some small queue pages were not freed"); | |
103 | ||
104 | kmem_cache_free(pd_cache, my_pd); | |
fab97220 HS |
105 | |
106 | return 0; | |
107 | } | |
108 | ||
109 | int ehca_init_pd_cache(void) | |
110 | { | |
111 | pd_cache = kmem_cache_create("ehca_cache_pd", | |
112 | sizeof(struct ehca_pd), 0, | |
113 | SLAB_HWCACHE_ALIGN, | |
20c2df83 | 114 | NULL); |
fab97220 HS |
115 | if (!pd_cache) |
116 | return -ENOMEM; | |
117 | return 0; | |
118 | } | |
119 | ||
120 | void ehca_cleanup_pd_cache(void) | |
121 | { | |
122 | if (pd_cache) | |
123 | kmem_cache_destroy(pd_cache); | |
124 | } |