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Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * Isochronous IO functionality | |
3038e353 | 3 | * |
3038e353 KH |
4 | * Copyright (C) 2006 Kristian Hoegsberg <krh@bitplanet.net> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/dma-mapping.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/mm.h> | |
26 | ||
27 | #include "fw-transaction.h" | |
28 | #include "fw-topology.h" | |
19a15b93 | 29 | #include "fw-device.h" |
3038e353 | 30 | |
53dca511 SR |
31 | int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card, |
32 | int page_count, enum dma_data_direction direction) | |
3038e353 | 33 | { |
2dbd7d7e | 34 | int i, j; |
9aad8125 KH |
35 | dma_addr_t address; |
36 | ||
37 | buffer->page_count = page_count; | |
38 | buffer->direction = direction; | |
39 | ||
40 | buffer->pages = kmalloc(page_count * sizeof(buffer->pages[0]), | |
41 | GFP_KERNEL); | |
42 | if (buffer->pages == NULL) | |
43 | goto out; | |
44 | ||
45 | for (i = 0; i < buffer->page_count; i++) { | |
68be3fa1 | 46 | buffer->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
9aad8125 KH |
47 | if (buffer->pages[i] == NULL) |
48 | goto out_pages; | |
373b2edd | 49 | |
9aad8125 KH |
50 | address = dma_map_page(card->device, buffer->pages[i], |
51 | 0, PAGE_SIZE, direction); | |
8d8bb39b | 52 | if (dma_mapping_error(card->device, address)) { |
9aad8125 KH |
53 | __free_page(buffer->pages[i]); |
54 | goto out_pages; | |
55 | } | |
56 | set_page_private(buffer->pages[i], address); | |
3038e353 KH |
57 | } |
58 | ||
59 | return 0; | |
82eff9db | 60 | |
9aad8125 KH |
61 | out_pages: |
62 | for (j = 0; j < i; j++) { | |
63 | address = page_private(buffer->pages[j]); | |
64 | dma_unmap_page(card->device, address, | |
82eff9db | 65 | PAGE_SIZE, DMA_TO_DEVICE); |
9aad8125 KH |
66 | __free_page(buffer->pages[j]); |
67 | } | |
68 | kfree(buffer->pages); | |
69 | out: | |
70 | buffer->pages = NULL; | |
2dbd7d7e | 71 | return -ENOMEM; |
9aad8125 KH |
72 | } |
73 | ||
74 | int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma) | |
75 | { | |
76 | unsigned long uaddr; | |
2dbd7d7e | 77 | int i, ret; |
9aad8125 KH |
78 | |
79 | uaddr = vma->vm_start; | |
80 | for (i = 0; i < buffer->page_count; i++) { | |
2dbd7d7e SR |
81 | ret = vm_insert_page(vma, uaddr, buffer->pages[i]); |
82 | if (ret) | |
83 | return ret; | |
9aad8125 KH |
84 | uaddr += PAGE_SIZE; |
85 | } | |
86 | ||
87 | return 0; | |
3038e353 KH |
88 | } |
89 | ||
9aad8125 KH |
90 | void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, |
91 | struct fw_card *card) | |
3038e353 KH |
92 | { |
93 | int i; | |
9aad8125 | 94 | dma_addr_t address; |
3038e353 | 95 | |
9aad8125 KH |
96 | for (i = 0; i < buffer->page_count; i++) { |
97 | address = page_private(buffer->pages[i]); | |
98 | dma_unmap_page(card->device, address, | |
3038e353 | 99 | PAGE_SIZE, DMA_TO_DEVICE); |
9aad8125 KH |
100 | __free_page(buffer->pages[i]); |
101 | } | |
3038e353 | 102 | |
9aad8125 KH |
103 | kfree(buffer->pages); |
104 | buffer->pages = NULL; | |
3038e353 KH |
105 | } |
106 | ||
53dca511 SR |
107 | struct fw_iso_context *fw_iso_context_create(struct fw_card *card, |
108 | int type, int channel, int speed, size_t header_size, | |
109 | fw_iso_callback_t callback, void *callback_data) | |
3038e353 KH |
110 | { |
111 | struct fw_iso_context *ctx; | |
3038e353 | 112 | |
4817ed24 SR |
113 | ctx = card->driver->allocate_iso_context(card, |
114 | type, channel, header_size); | |
3038e353 KH |
115 | if (IS_ERR(ctx)) |
116 | return ctx; | |
117 | ||
118 | ctx->card = card; | |
119 | ctx->type = type; | |
21efb3cf KH |
120 | ctx->channel = channel; |
121 | ctx->speed = speed; | |
295e3feb | 122 | ctx->header_size = header_size; |
3038e353 KH |
123 | ctx->callback = callback; |
124 | ctx->callback_data = callback_data; | |
125 | ||
3038e353 KH |
126 | return ctx; |
127 | } | |
3038e353 KH |
128 | |
129 | void fw_iso_context_destroy(struct fw_iso_context *ctx) | |
130 | { | |
131 | struct fw_card *card = ctx->card; | |
132 | ||
3038e353 KH |
133 | card->driver->free_iso_context(ctx); |
134 | } | |
3038e353 | 135 | |
53dca511 SR |
136 | int fw_iso_context_start(struct fw_iso_context *ctx, |
137 | int cycle, int sync, int tags) | |
3038e353 | 138 | { |
eb0306ea | 139 | return ctx->card->driver->start_iso(ctx, cycle, sync, tags); |
3038e353 | 140 | } |
3038e353 | 141 | |
53dca511 SR |
142 | int fw_iso_context_queue(struct fw_iso_context *ctx, |
143 | struct fw_iso_packet *packet, | |
144 | struct fw_iso_buffer *buffer, | |
145 | unsigned long payload) | |
3038e353 KH |
146 | { |
147 | struct fw_card *card = ctx->card; | |
148 | ||
9aad8125 | 149 | return card->driver->queue_iso(ctx, packet, buffer, payload); |
3038e353 | 150 | } |
b8295668 | 151 | |
53dca511 | 152 | int fw_iso_context_stop(struct fw_iso_context *ctx) |
b8295668 KH |
153 | { |
154 | return ctx->card->driver->stop_iso(ctx); | |
155 | } |