1 | /*
|
---|
2 | * Copyright (c) 2009 Jiri Svoboda
|
---|
3 | * All rights reserved.
|
---|
4 | *
|
---|
5 | * Redistribution and use in source and binary forms, with or without
|
---|
6 | * modification, are permitted provided that the following conditions
|
---|
7 | * are met:
|
---|
8 | *
|
---|
9 | * - Redistributions of source code must retain the above copyright
|
---|
10 | * notice, this list of conditions and the following disclaimer.
|
---|
11 | * - Redistributions in binary form must reproduce the above copyright
|
---|
12 | * notice, this list of conditions and the following disclaimer in the
|
---|
13 | * documentation and/or other materials provided with the distribution.
|
---|
14 | * - The name of the author may not be used to endorse or promote products
|
---|
15 | * derived from this software without specific prior written permission.
|
---|
16 | *
|
---|
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
---|
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
---|
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
---|
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
---|
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
---|
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
---|
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
---|
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
---|
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
27 | */
|
---|
28 |
|
---|
29 | /** @addtogroup bd
|
---|
30 | * @{
|
---|
31 | */
|
---|
32 |
|
---|
33 | /**
|
---|
34 | * @file
|
---|
35 | * @brief GXemul disk driver
|
---|
36 | */
|
---|
37 |
|
---|
38 | #include <stdio.h>
|
---|
39 | #include <libarch/ddi.h>
|
---|
40 | #include <ddi.h>
|
---|
41 | #include <ipc/bd.h>
|
---|
42 | #include <async.h>
|
---|
43 | #include <as.h>
|
---|
44 | #include <fibril_synch.h>
|
---|
45 | #include <devmap.h>
|
---|
46 | #include <sys/types.h>
|
---|
47 | #include <errno.h>
|
---|
48 | #include <macros.h>
|
---|
49 | #include <task.h>
|
---|
50 |
|
---|
51 | #define NAME "gxe_bd"
|
---|
52 | #define NAMESPACE "bd"
|
---|
53 |
|
---|
54 | enum {
|
---|
55 | CTL_READ_START = 0,
|
---|
56 | CTL_WRITE_START = 1,
|
---|
57 | };
|
---|
58 |
|
---|
59 | enum {
|
---|
60 | STATUS_FAILURE = 0
|
---|
61 | };
|
---|
62 |
|
---|
63 | enum {
|
---|
64 | MAX_DISKS = 2
|
---|
65 | };
|
---|
66 |
|
---|
67 | typedef struct {
|
---|
68 | uint32_t offset_lo;
|
---|
69 | uint32_t pad0;
|
---|
70 | uint32_t offset_hi;
|
---|
71 | uint32_t pad1;
|
---|
72 |
|
---|
73 | uint32_t disk_id;
|
---|
74 | uint32_t pad2[3];
|
---|
75 |
|
---|
76 | uint32_t control;
|
---|
77 | uint32_t pad3[3];
|
---|
78 |
|
---|
79 | uint32_t status;
|
---|
80 |
|
---|
81 | uint32_t pad4[3];
|
---|
82 | uint8_t pad5[0x3fc0];
|
---|
83 |
|
---|
84 | uint8_t buffer[512];
|
---|
85 | } gxe_bd_t;
|
---|
86 |
|
---|
87 |
|
---|
88 | static const size_t block_size = 512;
|
---|
89 | static size_t comm_size;
|
---|
90 |
|
---|
91 | static uintptr_t dev_physical = 0x13000000;
|
---|
92 | static gxe_bd_t *dev;
|
---|
93 |
|
---|
94 | static devmap_handle_t devmap_handle[MAX_DISKS];
|
---|
95 |
|
---|
96 | static fibril_mutex_t dev_lock[MAX_DISKS];
|
---|
97 |
|
---|
98 | static int gxe_bd_init(void);
|
---|
99 | static void gxe_bd_connection(ipc_callid_t iid, ipc_call_t *icall);
|
---|
100 | static int gxe_bd_read_blocks(int disk_id, uint64_t ba, unsigned cnt,
|
---|
101 | void *buf);
|
---|
102 | static int gxe_bd_write_blocks(int disk_id, uint64_t ba, unsigned cnt,
|
---|
103 | const void *buf);
|
---|
104 | static int gxe_bd_read_block(int disk_id, uint64_t ba, void *buf);
|
---|
105 | static int gxe_bd_write_block(int disk_id, uint64_t ba, const void *buf);
|
---|
106 |
|
---|
107 | int main(int argc, char **argv)
|
---|
108 | {
|
---|
109 | printf(NAME ": GXemul disk driver\n");
|
---|
110 |
|
---|
111 | if (gxe_bd_init() != EOK)
|
---|
112 | return -1;
|
---|
113 |
|
---|
114 | printf(NAME ": Accepting connections\n");
|
---|
115 | task_retval(0);
|
---|
116 | async_manager();
|
---|
117 |
|
---|
118 | /* Not reached */
|
---|
119 | return 0;
|
---|
120 | }
|
---|
121 |
|
---|
122 | static int gxe_bd_init(void)
|
---|
123 | {
|
---|
124 | void *vaddr;
|
---|
125 | int rc, i;
|
---|
126 | char name[16];
|
---|
127 |
|
---|
128 | rc = devmap_driver_register(NAME, gxe_bd_connection);
|
---|
129 | if (rc < 0) {
|
---|
130 | printf(NAME ": Unable to register driver.\n");
|
---|
131 | return rc;
|
---|
132 | }
|
---|
133 |
|
---|
134 | rc = pio_enable((void *) dev_physical, sizeof(gxe_bd_t), &vaddr);
|
---|
135 | if (rc != EOK) {
|
---|
136 | printf(NAME ": Could not initialize device I/O space.\n");
|
---|
137 | return rc;
|
---|
138 | }
|
---|
139 |
|
---|
140 | dev = vaddr;
|
---|
141 |
|
---|
142 | for (i = 0; i < MAX_DISKS; i++) {
|
---|
143 | snprintf(name, 16, "%s/disk%d", NAMESPACE, i);
|
---|
144 | rc = devmap_device_register(name, &devmap_handle[i]);
|
---|
145 | if (rc != EOK) {
|
---|
146 | printf(NAME ": Unable to register device %s.\n", name);
|
---|
147 | return rc;
|
---|
148 | }
|
---|
149 | fibril_mutex_initialize(&dev_lock[i]);
|
---|
150 | }
|
---|
151 |
|
---|
152 | return EOK;
|
---|
153 | }
|
---|
154 |
|
---|
155 | static void gxe_bd_connection(ipc_callid_t iid, ipc_call_t *icall)
|
---|
156 | {
|
---|
157 | void *fs_va = NULL;
|
---|
158 | ipc_callid_t callid;
|
---|
159 | ipc_call_t call;
|
---|
160 | sysarg_t method;
|
---|
161 | devmap_handle_t dh;
|
---|
162 | unsigned int flags;
|
---|
163 | int retval;
|
---|
164 | uint64_t ba;
|
---|
165 | unsigned cnt;
|
---|
166 | int disk_id, i;
|
---|
167 |
|
---|
168 | /* Get the device handle. */
|
---|
169 | dh = IPC_GET_ARG1(*icall);
|
---|
170 |
|
---|
171 | /* Determine which disk device is the client connecting to. */
|
---|
172 | disk_id = -1;
|
---|
173 | for (i = 0; i < MAX_DISKS; i++)
|
---|
174 | if (devmap_handle[i] == dh)
|
---|
175 | disk_id = i;
|
---|
176 |
|
---|
177 | if (disk_id < 0) {
|
---|
178 | async_answer_0(iid, EINVAL);
|
---|
179 | return;
|
---|
180 | }
|
---|
181 |
|
---|
182 | /* Answer the IPC_M_CONNECT_ME_TO call. */
|
---|
183 | async_answer_0(iid, EOK);
|
---|
184 |
|
---|
185 | if (!async_share_out_receive(&callid, &comm_size, &flags)) {
|
---|
186 | async_answer_0(callid, EHANGUP);
|
---|
187 | return;
|
---|
188 | }
|
---|
189 |
|
---|
190 | if (comm_size < block_size) {
|
---|
191 | async_answer_0(callid, EHANGUP);
|
---|
192 | return;
|
---|
193 | }
|
---|
194 |
|
---|
195 | fs_va = as_get_mappable_page(comm_size);
|
---|
196 | if (fs_va == NULL) {
|
---|
197 | async_answer_0(callid, EHANGUP);
|
---|
198 | return;
|
---|
199 | }
|
---|
200 |
|
---|
201 | (void) async_share_out_finalize(callid, fs_va);
|
---|
202 |
|
---|
203 | while (1) {
|
---|
204 | callid = async_get_call(&call);
|
---|
205 | method = IPC_GET_IMETHOD(call);
|
---|
206 | switch (method) {
|
---|
207 | case IPC_M_PHONE_HUNGUP:
|
---|
208 | /* The other side has hung up. */
|
---|
209 | async_answer_0(callid, EOK);
|
---|
210 | return;
|
---|
211 | case BD_READ_BLOCKS:
|
---|
212 | ba = MERGE_LOUP32(IPC_GET_ARG1(call),
|
---|
213 | IPC_GET_ARG2(call));
|
---|
214 | cnt = IPC_GET_ARG3(call);
|
---|
215 | if (cnt * block_size > comm_size) {
|
---|
216 | retval = ELIMIT;
|
---|
217 | break;
|
---|
218 | }
|
---|
219 | retval = gxe_bd_read_blocks(disk_id, ba, cnt, fs_va);
|
---|
220 | break;
|
---|
221 | case BD_WRITE_BLOCKS:
|
---|
222 | ba = MERGE_LOUP32(IPC_GET_ARG1(call),
|
---|
223 | IPC_GET_ARG2(call));
|
---|
224 | cnt = IPC_GET_ARG3(call);
|
---|
225 | if (cnt * block_size > comm_size) {
|
---|
226 | retval = ELIMIT;
|
---|
227 | break;
|
---|
228 | }
|
---|
229 | retval = gxe_bd_write_blocks(disk_id, ba, cnt, fs_va);
|
---|
230 | break;
|
---|
231 | case BD_GET_BLOCK_SIZE:
|
---|
232 | async_answer_1(callid, EOK, block_size);
|
---|
233 | continue;
|
---|
234 | case BD_GET_NUM_BLOCKS:
|
---|
235 | retval = ENOTSUP;
|
---|
236 | break;
|
---|
237 | default:
|
---|
238 | retval = EINVAL;
|
---|
239 | break;
|
---|
240 | }
|
---|
241 | async_answer_0(callid, retval);
|
---|
242 | }
|
---|
243 | }
|
---|
244 |
|
---|
245 | /** Read multiple blocks from the device. */
|
---|
246 | static int gxe_bd_read_blocks(int disk_id, uint64_t ba, unsigned cnt,
|
---|
247 | void *buf) {
|
---|
248 |
|
---|
249 | int rc;
|
---|
250 |
|
---|
251 | while (cnt > 0) {
|
---|
252 | rc = gxe_bd_read_block(disk_id, ba, buf);
|
---|
253 | if (rc != EOK)
|
---|
254 | return rc;
|
---|
255 |
|
---|
256 | ++ba;
|
---|
257 | --cnt;
|
---|
258 | buf += block_size;
|
---|
259 | }
|
---|
260 |
|
---|
261 | return EOK;
|
---|
262 | }
|
---|
263 |
|
---|
264 | /** Write multiple blocks to the device. */
|
---|
265 | static int gxe_bd_write_blocks(int disk_id, uint64_t ba, unsigned cnt,
|
---|
266 | const void *buf) {
|
---|
267 |
|
---|
268 | int rc;
|
---|
269 |
|
---|
270 | while (cnt > 0) {
|
---|
271 | rc = gxe_bd_write_block(disk_id, ba, buf);
|
---|
272 | if (rc != EOK)
|
---|
273 | return rc;
|
---|
274 |
|
---|
275 | ++ba;
|
---|
276 | --cnt;
|
---|
277 | buf += block_size;
|
---|
278 | }
|
---|
279 |
|
---|
280 | return EOK;
|
---|
281 | }
|
---|
282 |
|
---|
283 | /** Read a block from the device. */
|
---|
284 | static int gxe_bd_read_block(int disk_id, uint64_t ba, void *buf)
|
---|
285 | {
|
---|
286 | uint32_t status;
|
---|
287 | uint64_t byte_addr;
|
---|
288 | size_t i;
|
---|
289 | uint32_t w;
|
---|
290 |
|
---|
291 | byte_addr = ba * block_size;
|
---|
292 |
|
---|
293 | fibril_mutex_lock(&dev_lock[disk_id]);
|
---|
294 | pio_write_32(&dev->offset_lo, (uint32_t) byte_addr);
|
---|
295 | pio_write_32(&dev->offset_hi, byte_addr >> 32);
|
---|
296 | pio_write_32(&dev->disk_id, disk_id);
|
---|
297 | pio_write_32(&dev->control, CTL_READ_START);
|
---|
298 |
|
---|
299 | status = pio_read_32(&dev->status);
|
---|
300 | if (status == STATUS_FAILURE) {
|
---|
301 | fibril_mutex_unlock(&dev_lock[disk_id]);
|
---|
302 | return EIO;
|
---|
303 | }
|
---|
304 |
|
---|
305 | for (i = 0; i < block_size; i++) {
|
---|
306 | ((uint8_t *) buf)[i] = w = pio_read_8(&dev->buffer[i]);
|
---|
307 | }
|
---|
308 |
|
---|
309 | fibril_mutex_unlock(&dev_lock[disk_id]);
|
---|
310 | return EOK;
|
---|
311 | }
|
---|
312 |
|
---|
313 | /** Write a block to the device. */
|
---|
314 | static int gxe_bd_write_block(int disk_id, uint64_t ba, const void *buf)
|
---|
315 | {
|
---|
316 | uint32_t status;
|
---|
317 | uint64_t byte_addr;
|
---|
318 | size_t i;
|
---|
319 |
|
---|
320 | byte_addr = ba * block_size;
|
---|
321 |
|
---|
322 | fibril_mutex_lock(&dev_lock[disk_id]);
|
---|
323 |
|
---|
324 | for (i = 0; i < block_size; i++) {
|
---|
325 | pio_write_8(&dev->buffer[i], ((const uint8_t *) buf)[i]);
|
---|
326 | }
|
---|
327 |
|
---|
328 | pio_write_32(&dev->offset_lo, (uint32_t) byte_addr);
|
---|
329 | pio_write_32(&dev->offset_hi, byte_addr >> 32);
|
---|
330 | pio_write_32(&dev->disk_id, disk_id);
|
---|
331 | pio_write_32(&dev->control, CTL_WRITE_START);
|
---|
332 |
|
---|
333 | status = pio_read_32(&dev->status);
|
---|
334 | if (status == STATUS_FAILURE) {
|
---|
335 | fibril_mutex_unlock(&dev_lock[disk_id]);
|
---|
336 | return EIO;
|
---|
337 | }
|
---|
338 |
|
---|
339 | fibril_mutex_unlock(&dev_lock[disk_id]);
|
---|
340 | return EOK;
|
---|
341 | }
|
---|
342 |
|
---|
343 | /**
|
---|
344 | * @}
|
---|
345 | */
|
---|