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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jakub Jermar |
2 | * Copyright (c) 2008 Jakub Jermar |
3 | * Copyright (c) 2008 Martin Decky |
3 | * Copyright (c) 2008 Martin Decky |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup libblock |
30 | /** @addtogroup libblock |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief |
35 | * @brief |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include "libblock.h" |
38 | #include "libblock.h" |
39 | #include "../../srv/vfs/vfs.h" |
39 | #include "../../srv/vfs/vfs.h" |
40 | #include "../../srv/rd/rd.h" |
40 | #include "../../srv/rd/rd.h" |
41 | #include <ipc/devmap.h> |
41 | #include <ipc/devmap.h> |
42 | #include <ipc/services.h> |
42 | #include <ipc/services.h> |
43 | #include <errno.h> |
43 | #include <errno.h> |
44 | #include <sys/mman.h> |
44 | #include <sys/mman.h> |
45 | #include <async.h> |
45 | #include <async.h> |
46 | #include <ipc/ipc.h> |
46 | #include <ipc/ipc.h> |
47 | #include <as.h> |
47 | #include <as.h> |
48 | #include <assert.h> |
48 | #include <assert.h> |
49 | #include <futex.h> |
49 | #include <futex.h> |
50 | #include <libadt/list.h> |
50 | #include <libadt/list.h> |
51 | 51 | ||
52 | /** Lock protecting the device connection list */ |
52 | /** Lock protecting the device connection list */ |
53 | static futex_t dcl_lock = FUTEX_INITIALIZER; |
53 | static futex_t dcl_lock = FUTEX_INITIALIZER; |
54 | /** Device connection list head. */ |
54 | /** Device connection list head. */ |
55 | static LIST_INITIALIZE(dcl_head); |
55 | static LIST_INITIALIZE(dcl_head); |
56 | 56 | ||
57 | typedef struct { |
57 | typedef struct { |
58 | link_t link; |
58 | link_t link; |
59 | int dev_handle; |
59 | int dev_handle; |
60 | int dev_phone; |
60 | int dev_phone; |
61 | void *com_area; |
61 | void *com_area; |
62 | size_t com_size; |
62 | size_t com_size; |
63 | void *bb_buf; |
63 | void *bb_buf; |
64 | off_t bb_off; |
64 | off_t bb_off; |
65 | size_t bb_size; |
65 | size_t bb_size; |
66 | } devcon_t; |
66 | } devcon_t; |
67 | 67 | ||
68 | static devcon_t *devcon_search(dev_handle_t dev_handle) |
68 | static devcon_t *devcon_search(dev_handle_t dev_handle) |
69 | { |
69 | { |
70 | link_t *cur; |
70 | link_t *cur; |
71 | 71 | ||
72 | futex_down(&dcl_lock); |
72 | futex_down(&dcl_lock); |
73 | for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) { |
73 | for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) { |
74 | devcon_t *devcon = list_get_instance(cur, devcon_t, link); |
74 | devcon_t *devcon = list_get_instance(cur, devcon_t, link); |
75 | if (devcon->dev_handle == dev_handle) { |
75 | if (devcon->dev_handle == dev_handle) { |
76 | futex_up(&dcl_lock); |
76 | futex_up(&dcl_lock); |
77 | return devcon; |
77 | return devcon; |
78 | } |
78 | } |
79 | } |
79 | } |
80 | futex_up(&dcl_lock); |
80 | futex_up(&dcl_lock); |
81 | return NULL; |
81 | return NULL; |
82 | } |
82 | } |
83 | 83 | ||
84 | static int devcon_add(dev_handle_t dev_handle, int dev_phone, void *com_area, |
84 | static int devcon_add(dev_handle_t dev_handle, int dev_phone, void *com_area, |
85 | size_t com_size) |
85 | size_t com_size) |
86 | { |
86 | { |
87 | link_t *cur; |
87 | link_t *cur; |
88 | devcon_t *devcon; |
88 | devcon_t *devcon; |
89 | 89 | ||
90 | devcon = malloc(sizeof(devcon_t)); |
90 | devcon = malloc(sizeof(devcon_t)); |
91 | if (!devcon) |
91 | if (!devcon) |
92 | return ENOMEM; |
92 | return ENOMEM; |
93 | 93 | ||
94 | link_initialize(&devcon->link); |
94 | link_initialize(&devcon->link); |
95 | devcon->dev_handle = dev_handle; |
95 | devcon->dev_handle = dev_handle; |
96 | devcon->dev_phone = dev_phone; |
96 | devcon->dev_phone = dev_phone; |
97 | devcon->com_area = com_area; |
97 | devcon->com_area = com_area; |
98 | devcon->com_size = com_size; |
98 | devcon->com_size = com_size; |
99 | devcon->bb_buf = NULL; |
99 | devcon->bb_buf = NULL; |
100 | devcon->bb_off = 0; |
100 | devcon->bb_off = 0; |
101 | devcon->bb_size = 0; |
101 | devcon->bb_size = 0; |
102 | 102 | ||
103 | futex_down(&dcl_lock); |
103 | futex_down(&dcl_lock); |
104 | for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) { |
104 | for (cur = dcl_head.next; cur != &dcl_head; cur = cur->next) { |
105 | devcon_t *d = list_get_instance(cur, devcon_t, link); |
105 | devcon_t *d = list_get_instance(cur, devcon_t, link); |
106 | if (d->dev_handle == dev_handle) { |
106 | if (d->dev_handle == dev_handle) { |
107 | futex_up(&dcl_lock); |
107 | futex_up(&dcl_lock); |
108 | free(devcon); |
108 | free(devcon); |
109 | return EEXIST; |
109 | return EEXIST; |
110 | } |
110 | } |
111 | } |
111 | } |
112 | list_append(&devcon->link, &dcl_head); |
112 | list_append(&devcon->link, &dcl_head); |
113 | futex_up(&dcl_lock); |
113 | futex_up(&dcl_lock); |
114 | return EOK; |
114 | return EOK; |
115 | } |
115 | } |
116 | 116 | ||
117 | static void devcon_remove(devcon_t *devcon) |
117 | static void devcon_remove(devcon_t *devcon) |
118 | { |
118 | { |
119 | futex_down(&dcl_lock); |
119 | futex_down(&dcl_lock); |
120 | list_remove(&devcon->link); |
120 | list_remove(&devcon->link); |
121 | futex_up(&dcl_lock); |
121 | futex_up(&dcl_lock); |
122 | } |
122 | } |
123 | 123 | ||
124 | int block_init(dev_handle_t dev_handle, size_t com_size) |
124 | int block_init(dev_handle_t dev_handle, size_t com_size) |
125 | { |
125 | { |
126 | int rc; |
126 | int rc; |
127 | int dev_phone; |
127 | int dev_phone; |
128 | void *com_area; |
128 | void *com_area; |
129 | 129 | ||
130 | com_area = mmap(NULL, com_size, PROTO_READ | PROTO_WRITE, |
130 | com_area = mmap(NULL, com_size, PROTO_READ | PROTO_WRITE, |
131 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); |
131 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); |
132 | if (!com_area) { |
132 | if (!com_area) { |
133 | return ENOMEM; |
133 | return ENOMEM; |
134 | } |
134 | } |
135 | dev_phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, |
135 | dev_phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, |
136 | DEVMAP_CONNECT_TO_DEVICE, dev_handle); |
136 | DEVMAP_CONNECT_TO_DEVICE, dev_handle); |
137 | 137 | ||
138 | if (dev_phone < 0) { |
138 | if (dev_phone < 0) { |
139 | munmap(com_area, com_size); |
139 | munmap(com_area, com_size); |
140 | return dev_phone; |
140 | return dev_phone; |
141 | } |
141 | } |
142 | 142 | ||
143 | rc = ipc_share_out_start(dev_phone, com_area, |
143 | rc = ipc_share_out_start(dev_phone, com_area, |
144 | AS_AREA_READ | AS_AREA_WRITE); |
144 | AS_AREA_READ | AS_AREA_WRITE); |
145 | if (rc != EOK) { |
145 | if (rc != EOK) { |
146 | munmap(com_area, com_size); |
146 | munmap(com_area, com_size); |
147 | ipc_hangup(dev_phone); |
147 | ipc_hangup(dev_phone); |
148 | return rc; |
148 | return rc; |
149 | } |
149 | } |
150 | 150 | ||
151 | rc = devcon_add(dev_handle, dev_phone, com_area, com_size); |
151 | rc = devcon_add(dev_handle, dev_phone, com_area, com_size); |
152 | if (rc != EOK) { |
152 | if (rc != EOK) { |
153 | munmap(com_area, com_size); |
153 | munmap(com_area, com_size); |
154 | ipc_hangup(dev_phone); |
154 | ipc_hangup(dev_phone); |
155 | return rc; |
155 | return rc; |
156 | } |
156 | } |
157 | 157 | ||
158 | return EOK; |
158 | return EOK; |
159 | } |
159 | } |
160 | 160 | ||
161 | void block_fini(dev_handle_t dev_handle) |
161 | void block_fini(dev_handle_t dev_handle) |
162 | { |
162 | { |
163 | devcon_t *devcon = devcon_search(dev_handle); |
163 | devcon_t *devcon = devcon_search(dev_handle); |
164 | assert(devcon); |
164 | assert(devcon); |
165 | 165 | ||
166 | devcon_remove(devcon); |
166 | devcon_remove(devcon); |
167 | 167 | ||
168 | if (devcon->bb_buf) |
168 | if (devcon->bb_buf) |
169 | free(devcon->bb_buf); |
169 | free(devcon->bb_buf); |
170 | munmap(devcon->com_area, devcon->com_size); |
170 | munmap(devcon->com_area, devcon->com_size); |
171 | ipc_hangup(devcon->dev_phone); |
171 | ipc_hangup(devcon->dev_phone); |
172 | 172 | ||
173 | free(devcon); |
173 | free(devcon); |
174 | } |
174 | } |
175 | 175 | ||
176 | int block_bb_read(dev_handle_t dev_handle, off_t off, size_t size) |
176 | int block_bb_read(dev_handle_t dev_handle, off_t off, size_t size) |
177 | { |
177 | { |
178 | void *bb_buf; |
178 | void *bb_buf; |
- | 179 | int rc; |
|
179 | 180 | ||
180 | devcon_t *devcon = devcon_search(dev_handle); |
181 | devcon_t *devcon = devcon_search(dev_handle); |
181 | if (!devcon) |
182 | if (!devcon) |
182 | return ENOENT; |
183 | return ENOENT; |
183 | if (devcon->bb_buf) |
184 | if (devcon->bb_buf) |
184 | return EEXIST; |
185 | return EEXIST; |
185 | bb_buf = malloc(size); |
186 | bb_buf = malloc(size); |
186 | if (!bb_buf) |
187 | if (!bb_buf) |
187 | return ENOMEM; |
188 | return ENOMEM; |
188 | 189 | ||
189 | off_t bufpos = 0; |
190 | off_t bufpos = 0; |
190 | size_t buflen = 0; |
191 | size_t buflen = 0; |
191 | if (!block_read(dev_handle, &bufpos, &buflen, &off, |
192 | rc = block_read(dev_handle, &bufpos, &buflen, &off, |
192 | bb_buf, size, size)) { |
193 | bb_buf, size, size); |
- | 194 | if (rc != EOK) { |
|
193 | free(bb_buf); |
195 | free(bb_buf); |
194 | return EIO; /* XXX real error code */ |
196 | return rc; |
195 | } |
197 | } |
196 | devcon->bb_buf = bb_buf; |
198 | devcon->bb_buf = bb_buf; |
197 | devcon->bb_off = off; |
199 | devcon->bb_off = off; |
198 | devcon->bb_size = size; |
200 | devcon->bb_size = size; |
199 | 201 | ||
200 | return EOK; |
202 | return EOK; |
201 | } |
203 | } |
202 | 204 | ||
203 | void *block_bb_get(dev_handle_t dev_handle) |
205 | void *block_bb_get(dev_handle_t dev_handle) |
204 | { |
206 | { |
205 | devcon_t *devcon = devcon_search(dev_handle); |
207 | devcon_t *devcon = devcon_search(dev_handle); |
206 | assert(devcon); |
208 | assert(devcon); |
207 | return devcon->bb_buf; |
209 | return devcon->bb_buf; |
208 | } |
210 | } |
209 | 211 | ||
210 | /** Read data from a block device. |
212 | /** Read data from a block device. |
211 | * |
213 | * |
212 | * @param dev_handle Device handle of the block device. |
214 | * @param dev_handle Device handle of the block device. |
213 | * @param bufpos Pointer to the first unread valid offset within the |
215 | * @param bufpos Pointer to the first unread valid offset within the |
214 | * communication buffer. |
216 | * communication buffer. |
215 | * @param buflen Pointer to the number of unread bytes that are ready in |
217 | * @param buflen Pointer to the number of unread bytes that are ready in |
216 | * the communication buffer. |
218 | * the communication buffer. |
217 | * @param pos Device position to be read. |
219 | * @param pos Device position to be read. |
218 | * @param dst Destination buffer. |
220 | * @param dst Destination buffer. |
219 | * @param size Size of the destination buffer. |
221 | * @param size Size of the destination buffer. |
220 | * @param block_size Block size to be used for the transfer. |
222 | * @param block_size Block size to be used for the transfer. |
221 | * |
223 | * |
222 | * @return True on success, false on failure. |
224 | * @return EOK on success or a negative return code on failure. |
223 | */ |
225 | */ |
224 | bool |
226 | int |
225 | block_read(int dev_handle, off_t *bufpos, size_t *buflen, off_t *pos, void *dst, |
227 | block_read(int dev_handle, off_t *bufpos, size_t *buflen, off_t *pos, void *dst, |
226 | size_t size, size_t block_size) |
228 | size_t size, size_t block_size) |
227 | { |
229 | { |
228 | off_t offset = 0; |
230 | off_t offset = 0; |
229 | size_t left = size; |
231 | size_t left = size; |
230 | devcon_t *devcon = devcon_search(dev_handle); |
232 | devcon_t *devcon = devcon_search(dev_handle); |
231 | assert(devcon); |
233 | assert(devcon); |
232 | 234 | ||
233 | while (left > 0) { |
235 | while (left > 0) { |
234 | size_t rd; |
236 | size_t rd; |
235 | 237 | ||
236 | if (*bufpos + left < *buflen) |
238 | if (*bufpos + left < *buflen) |
237 | rd = left; |
239 | rd = left; |
238 | else |
240 | else |
239 | rd = *buflen - *bufpos; |
241 | rd = *buflen - *bufpos; |
240 | 242 | ||
241 | if (rd > 0) { |
243 | if (rd > 0) { |
242 | /* |
244 | /* |
243 | * Copy the contents of the communication buffer to the |
245 | * Copy the contents of the communication buffer to the |
244 | * destination buffer. |
246 | * destination buffer. |
245 | */ |
247 | */ |
246 | memcpy(dst + offset, devcon->com_area + *bufpos, rd); |
248 | memcpy(dst + offset, devcon->com_area + *bufpos, rd); |
247 | offset += rd; |
249 | offset += rd; |
248 | *bufpos += rd; |
250 | *bufpos += rd; |
249 | *pos += rd; |
251 | *pos += rd; |
250 | left -= rd; |
252 | left -= rd; |
251 | } |
253 | } |
252 | 254 | ||
253 | if (*bufpos == *buflen) { |
255 | if (*bufpos == *buflen) { |
254 | /* Refill the communication buffer with a new block. */ |
256 | /* Refill the communication buffer with a new block. */ |
255 | ipcarg_t retval; |
257 | ipcarg_t retval; |
256 | int rc = async_req_2_1(devcon->dev_phone, RD_READ_BLOCK, |
258 | int rc = async_req_2_1(devcon->dev_phone, RD_READ_BLOCK, |
257 | *pos / block_size, block_size, &retval); |
259 | *pos / block_size, block_size, &retval); |
258 | if ((rc != EOK) || (retval != EOK)) |
260 | if ((rc != EOK) || (retval != EOK)) |
259 | return false; |
261 | return (rc != EOK ? rc : retval); |
260 | 262 | ||
261 | *bufpos = 0; |
263 | *bufpos = 0; |
262 | *buflen = block_size; |
264 | *buflen = block_size; |
263 | } |
265 | } |
264 | } |
266 | } |
265 | 267 | ||
266 | return true; |
268 | return EOK; |
267 | } |
269 | } |
268 | 270 | ||
269 | block_t *block_get(dev_handle_t dev_handle, off_t offset, size_t bs) |
271 | block_t *block_get(dev_handle_t dev_handle, off_t offset, size_t bs) |
270 | { |
272 | { |
271 | /* FIXME */ |
273 | /* FIXME */ |
272 | block_t *b; |
274 | block_t *b; |
273 | off_t bufpos = 0; |
275 | off_t bufpos = 0; |
274 | size_t buflen = 0; |
276 | size_t buflen = 0; |
275 | off_t pos = offset * bs; |
277 | off_t pos = offset * bs; |
276 | 278 | ||
277 | b = malloc(sizeof(block_t)); |
279 | b = malloc(sizeof(block_t)); |
278 | if (!b) |
280 | if (!b) |
279 | return NULL; |
281 | return NULL; |
280 | 282 | ||
281 | b->data = malloc(bs); |
283 | b->data = malloc(bs); |
282 | if (!b->data) { |
284 | if (!b->data) { |
283 | free(b); |
285 | free(b); |
284 | return NULL; |
286 | return NULL; |
285 | } |
287 | } |
286 | b->size = bs; |
288 | b->size = bs; |
287 | 289 | ||
288 | if (!block_read(dev_handle, &bufpos, &buflen, &pos, b->data, |
290 | if (block_read(dev_handle, &bufpos, &buflen, &pos, b->data, |
289 | bs, bs)) { |
291 | bs, bs) != EOK) { |
290 | free(b->data); |
292 | free(b->data); |
291 | free(b); |
293 | free(b); |
292 | return NULL; |
294 | return NULL; |
293 | } |
295 | } |
294 | 296 | ||
295 | return b; |
297 | return b; |
296 | } |
298 | } |
297 | 299 | ||
298 | void block_put(block_t *block) |
300 | void block_put(block_t *block) |
299 | { |
301 | { |
300 | /* FIXME */ |
302 | /* FIXME */ |
301 | free(block->data); |
303 | free(block->data); |
302 | free(block); |
304 | free(block); |
303 | } |
305 | } |
304 | 306 | ||
305 | /** @} |
307 | /** @} |
306 | */ |
308 | */ |
307 | 309 |