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fab97220 HS |
1 | /* |
2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER | |
3 | * | |
4 | * Event queue handling | |
5 | * | |
6 | * Authors: Waleri Fomin <fomin@de.ibm.com> | |
7 | * Khadija Souissi <souissi@de.ibm.com> | |
8 | * Reinhard Ernst <rernst@de.ibm.com> | |
9 | * Heiko J Schick <schickhj@de.ibm.com> | |
10 | * Hoang-Nam Nguyen <hnguyen@de.ibm.com> | |
11 | * | |
12 | * | |
13 | * Copyright (c) 2005 IBM Corporation | |
14 | * | |
15 | * All rights reserved. | |
16 | * | |
17 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB | |
18 | * BSD. | |
19 | * | |
20 | * OpenIB BSD License | |
21 | * | |
22 | * Redistribution and use in source and binary forms, with or without | |
23 | * modification, are permitted provided that the following conditions are met: | |
24 | * | |
25 | * Redistributions of source code must retain the above copyright notice, this | |
26 | * list of conditions and the following disclaimer. | |
27 | * | |
28 | * Redistributions in binary form must reproduce the above copyright notice, | |
29 | * this list of conditions and the following disclaimer in the documentation | |
30 | * and/or other materials | |
31 | * provided with the distribution. | |
32 | * | |
33 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
34 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
35 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
36 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
37 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
38 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
39 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
40 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
41 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
42 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
43 | * POSSIBILITY OF SUCH DAMAGE. | |
44 | */ | |
45 | ||
46 | #include "ehca_classes.h" | |
47 | #include "ehca_irq.h" | |
48 | #include "ehca_iverbs.h" | |
49 | #include "ehca_qes.h" | |
50 | #include "hcp_if.h" | |
51 | #include "ipz_pt_fn.h" | |
52 | ||
53 | int ehca_create_eq(struct ehca_shca *shca, | |
54 | struct ehca_eq *eq, | |
55 | const enum ehca_eq_type type, const u32 length) | |
56 | { | |
7df109d9 HNN |
57 | int ret; |
58 | u64 h_ret; | |
fab97220 HS |
59 | u32 nr_pages; |
60 | u32 i; | |
61 | void *vpage; | |
62 | struct ib_device *ib_dev = &shca->ib_device; | |
63 | ||
64 | spin_lock_init(&eq->spinlock); | |
78d8d5f9 | 65 | spin_lock_init(&eq->irq_spinlock); |
fab97220 HS |
66 | eq->is_initialized = 0; |
67 | ||
68 | if (type != EHCA_EQ && type != EHCA_NEQ) { | |
69 | ehca_err(ib_dev, "Invalid EQ type %x. eq=%p", type, eq); | |
70 | return -EINVAL; | |
71 | } | |
72 | if (!length) { | |
73 | ehca_err(ib_dev, "EQ length must not be zero. eq=%p", eq); | |
74 | return -EINVAL; | |
75 | } | |
76 | ||
7df109d9 HNN |
77 | h_ret = hipz_h_alloc_resource_eq(shca->ipz_hca_handle, |
78 | &eq->pf, | |
79 | type, | |
80 | length, | |
81 | &eq->ipz_eq_handle, | |
82 | &eq->length, | |
83 | &nr_pages, &eq->ist); | |
fab97220 | 84 | |
7df109d9 | 85 | if (h_ret != H_SUCCESS) { |
fab97220 HS |
86 | ehca_err(ib_dev, "Can't allocate EQ/NEQ. eq=%p", eq); |
87 | return -EINVAL; | |
88 | } | |
89 | ||
e2f81daf SR |
90 | ret = ipz_queue_ctor(NULL, &eq->ipz_queue, nr_pages, |
91 | EHCA_PAGESIZE, sizeof(struct ehca_eqe), 0, 0); | |
fab97220 HS |
92 | if (!ret) { |
93 | ehca_err(ib_dev, "Can't allocate EQ pages eq=%p", eq); | |
94 | goto create_eq_exit1; | |
95 | } | |
96 | ||
97 | for (i = 0; i < nr_pages; i++) { | |
98 | u64 rpage; | |
99 | ||
2b94397a | 100 | vpage = ipz_qpageit_get_inc(&eq->ipz_queue); |
7df109d9 | 101 | if (!vpage) |
fab97220 | 102 | goto create_eq_exit2; |
fab97220 | 103 | |
b4b8d1e4 | 104 | rpage = __pa(vpage); |
7df109d9 HNN |
105 | h_ret = hipz_h_register_rpage_eq(shca->ipz_hca_handle, |
106 | eq->ipz_eq_handle, | |
107 | &eq->pf, | |
108 | 0, 0, rpage, 1); | |
fab97220 HS |
109 | |
110 | if (i == (nr_pages - 1)) { | |
111 | /* last page */ | |
112 | vpage = ipz_qpageit_get_inc(&eq->ipz_queue); | |
7df109d9 | 113 | if (h_ret != H_SUCCESS || vpage) |
fab97220 HS |
114 | goto create_eq_exit2; |
115 | } else { | |
139cdab0 | 116 | if (h_ret != H_PAGE_REGISTERED) |
fab97220 HS |
117 | goto create_eq_exit2; |
118 | } | |
119 | } | |
120 | ||
121 | ipz_qeit_reset(&eq->ipz_queue); | |
122 | ||
123 | /* register interrupt handlers and initialize work queues */ | |
124 | if (type == EHCA_EQ) { | |
bd5d0ccb AS |
125 | tasklet_init(&eq->interrupt_task, ehca_tasklet_eq, (long)shca); |
126 | ||
6b08f3ae | 127 | ret = ibmebus_request_irq(eq->ist, ehca_interrupt_eq, |
10889a36 | 128 | 0, "ehca_eq", |
fab97220 HS |
129 | (void *)shca); |
130 | if (ret < 0) | |
131 | ehca_err(ib_dev, "Can't map interrupt handler."); | |
fab97220 | 132 | } else if (type == EHCA_NEQ) { |
bd5d0ccb AS |
133 | tasklet_init(&eq->interrupt_task, ehca_tasklet_neq, (long)shca); |
134 | ||
6b08f3ae | 135 | ret = ibmebus_request_irq(eq->ist, ehca_interrupt_neq, |
10889a36 | 136 | 0, "ehca_neq", |
fab97220 HS |
137 | (void *)shca); |
138 | if (ret < 0) | |
139 | ehca_err(ib_dev, "Can't map interrupt handler."); | |
fab97220 HS |
140 | } |
141 | ||
142 | eq->is_initialized = 1; | |
143 | ||
144 | return 0; | |
145 | ||
146 | create_eq_exit2: | |
e2f81daf | 147 | ipz_queue_dtor(NULL, &eq->ipz_queue); |
fab97220 HS |
148 | |
149 | create_eq_exit1: | |
150 | hipz_h_destroy_eq(shca->ipz_hca_handle, eq); | |
151 | ||
152 | return -EINVAL; | |
153 | } | |
154 | ||
155 | void *ehca_poll_eq(struct ehca_shca *shca, struct ehca_eq *eq) | |
156 | { | |
157 | unsigned long flags; | |
158 | void *eqe; | |
159 | ||
160 | spin_lock_irqsave(&eq->spinlock, flags); | |
161 | eqe = ipz_eqit_eq_get_inc_valid(&eq->ipz_queue); | |
162 | spin_unlock_irqrestore(&eq->spinlock, flags); | |
163 | ||
164 | return eqe; | |
165 | } | |
166 | ||
167 | int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq) | |
168 | { | |
169 | unsigned long flags; | |
170 | u64 h_ret; | |
171 | ||
6b08f3ae | 172 | ibmebus_free_irq(eq->ist, (void *)shca); |
fab97220 | 173 | |
94202694 AS |
174 | spin_lock_irqsave(&shca_list_lock, flags); |
175 | eq->is_initialized = 0; | |
176 | spin_unlock_irqrestore(&shca_list_lock, flags); | |
fab97220 | 177 | |
94202694 AS |
178 | tasklet_kill(&eq->interrupt_task); |
179 | ||
180 | h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq); | |
fab97220 HS |
181 | |
182 | if (h_ret != H_SUCCESS) { | |
183 | ehca_err(&shca->ib_device, "Can't free EQ resources."); | |
184 | return -EINVAL; | |
185 | } | |
e2f81daf | 186 | ipz_queue_dtor(NULL, &eq->ipz_queue); |
fab97220 HS |
187 | |
188 | return 0; | |
189 | } |