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1 | /* |
2 | * PS3 Storage Library |
3 | * |
4 | * Copyright (C) 2007 Sony Computer Entertainment Inc. |
5 | * Copyright 2007 Sony Corp. |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU General Public License as published |
9 | * by the Free Software Foundation; version 2 of the License. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, but |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; if not, write to the Free Software Foundation, Inc., |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
19 | */ |
20 | |
21 | #include <linux/dma-mapping.h> |
22 | #include <linux/module.h> |
23 | |
24 | #include <asm/lv1call.h> |
25 | #include <asm/ps3stor.h> |
26 | |
27 | /* |
28 | * A workaround for flash memory I/O errors when the internal hard disk |
29 | * has not been formatted for OtherOS use. Delay disk close until flash |
30 | * memory is closed. |
31 | */ |
32 | |
33 | static struct ps3_flash_workaround { |
34 | int flash_open; |
35 | int disk_open; |
36 | struct ps3_system_bus_device *disk_sbd; |
37 | } ps3_flash_workaround; |
38 | |
39 | static int ps3stor_open_hv_device(struct ps3_system_bus_device *sbd) |
40 | { |
41 | int error = ps3_open_hv_device(sbd); |
42 | |
43 | if (error) |
44 | return error; |
45 | |
46 | if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) |
47 | ps3_flash_workaround.flash_open = 1; |
48 | |
49 | if (sbd->match_id == PS3_MATCH_ID_STOR_DISK) |
50 | ps3_flash_workaround.disk_open = 1; |
51 | |
52 | return 0; |
53 | } |
54 | |
55 | static int ps3stor_close_hv_device(struct ps3_system_bus_device *sbd) |
56 | { |
57 | int error; |
58 | |
59 | if (sbd->match_id == PS3_MATCH_ID_STOR_DISK |
60 | && ps3_flash_workaround.disk_open |
61 | && ps3_flash_workaround.flash_open) { |
62 | ps3_flash_workaround.disk_sbd = sbd; |
63 | return 0; |
64 | } |
65 | |
66 | error = ps3_close_hv_device(sbd); |
67 | |
68 | if (error) |
69 | return error; |
70 | |
71 | if (sbd->match_id == PS3_MATCH_ID_STOR_DISK) |
72 | ps3_flash_workaround.disk_open = 0; |
73 | |
74 | if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) { |
75 | ps3_flash_workaround.flash_open = 0; |
76 | |
77 | if (ps3_flash_workaround.disk_sbd) { |
78 | ps3_close_hv_device(ps3_flash_workaround.disk_sbd); |
79 | ps3_flash_workaround.disk_open = 0; |
80 | ps3_flash_workaround.disk_sbd = NULL; |
81 | } |
82 | } |
83 | |
84 | return 0; |
85 | } |
86 | |
87 | static int ps3stor_probe_access(struct ps3_storage_device *dev) |
88 | { |
89 | int res, error; |
90 | unsigned int i; |
91 | unsigned long n; |
92 | |
93 | if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) { |
94 | /* special case: CD-ROM is assumed always accessible */ |
95 | dev->accessible_regions = 1; |
96 | return 0; |
97 | } |
98 | |
99 | error = -EPERM; |
100 | for (i = 0; i < dev->num_regions; i++) { |
101 | dev_dbg(&dev->sbd.core, |
102 | "%s:%u: checking accessibility of region %u\n", |
103 | __func__, __LINE__, i); |
104 | |
105 | dev->region_idx = i; |
106 | res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1, |
107 | 0); |
108 | if (res) { |
109 | dev_dbg(&dev->sbd.core, "%s:%u: read failed, " |
110 | "region %u is not accessible\n", __func__, |
111 | __LINE__, i); |
112 | continue; |
113 | } |
114 | |
115 | dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n", |
116 | __func__, __LINE__, i); |
117 | set_bit(i, &dev->accessible_regions); |
118 | |
119 | /* We can access at least one region */ |
120 | error = 0; |
121 | } |
122 | if (error) |
123 | return error; |
124 | |
125 | n = hweight_long(dev->accessible_regions); |
126 | if (n > 1) |
127 | dev_info(&dev->sbd.core, |
128 | "%s:%u: %lu accessible regions found. Only the first " |
129 | "one will be used\n", |
130 | __func__, __LINE__, n); |
131 | dev->region_idx = __ffs(dev->accessible_regions); |
132 | dev_info(&dev->sbd.core, |
133 | "First accessible region has index %u start %llu size %llu\n", |
134 | dev->region_idx, dev->regions[dev->region_idx].start, |
135 | dev->regions[dev->region_idx].size); |
136 | |
137 | return 0; |
138 | } |
139 | |
140 | |
141 | /** |
142 | * ps3stor_setup - Setup a storage device before use |
143 | * @dev: Pointer to a struct ps3_storage_device |
144 | * @handler: Pointer to an interrupt handler |
145 | * |
146 | * Returns 0 for success, or an error code |
147 | */ |
148 | int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler) |
149 | { |
150 | int error, res, alignment; |
151 | enum ps3_dma_page_size page_size; |
152 | |
153 | error = ps3stor_open_hv_device(&dev->sbd); |
154 | if (error) { |
155 | dev_err(&dev->sbd.core, |
156 | "%s:%u: ps3_open_hv_device failed %d\n", __func__, |
157 | __LINE__, error); |
158 | goto fail; |
159 | } |
160 | |
161 | error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY, |
162 | &dev->irq); |
163 | if (error) { |
164 | dev_err(&dev->sbd.core, |
165 | "%s:%u: ps3_sb_event_receive_port_setup failed %d\n", |
166 | __func__, __LINE__, error); |
167 | goto fail_close_device; |
168 | } |
169 | |
170 | error = request_irq(dev->irq, handler, 0, |
171 | dev->sbd.core.driver->name, dev); |
172 | if (error) { |
173 | dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n", |
174 | __func__, __LINE__, error); |
175 | goto fail_sb_event_receive_port_destroy; |
176 | } |
177 | |
178 | alignment = min(__ffs(dev->bounce_size), |
179 | __ffs((unsigned long)dev->bounce_buf)); |
180 | if (alignment < 12) { |
181 | dev_err(&dev->sbd.core, |
182 | "%s:%u: bounce buffer not aligned (%lx at 0x%p)\n", |
183 | __func__, __LINE__, dev->bounce_size, dev->bounce_buf); |
184 | error = -EINVAL; |
185 | goto fail_free_irq; |
186 | } else if (alignment < 16) |
187 | page_size = PS3_DMA_4K; |
188 | else |
189 | page_size = PS3_DMA_64K; |
190 | dev->sbd.d_region = &dev->dma_region; |
191 | ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size, |
192 | PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size); |
193 | res = ps3_dma_region_create(&dev->dma_region); |
194 | if (res) { |
195 | dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n", |
196 | __func__, __LINE__); |
197 | error = -ENOMEM; |
198 | goto fail_free_irq; |
199 | } |
200 | |
201 | dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf)); |
202 | dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf, |
203 | dev->bounce_size, DMA_BIDIRECTIONAL); |
204 | if (!dev->bounce_dma) { |
205 | dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n", |
206 | __func__, __LINE__); |
207 | error = -ENODEV; |
208 | goto fail_free_dma; |
209 | } |
210 | |
211 | error = ps3stor_probe_access(dev); |
212 | if (error) { |
213 | dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n", |
214 | __func__, __LINE__); |
215 | goto fail_unmap_dma; |
216 | } |
217 | return 0; |
218 | |
219 | fail_unmap_dma: |
220 | dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, |
221 | DMA_BIDIRECTIONAL); |
222 | fail_free_dma: |
223 | ps3_dma_region_free(&dev->dma_region); |
224 | fail_free_irq: |
225 | free_irq(dev->irq, dev); |
226 | fail_sb_event_receive_port_destroy: |
227 | ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); |
228 | fail_close_device: |
229 | ps3stor_close_hv_device(&dev->sbd); |
230 | fail: |
231 | return error; |
232 | } |
233 | EXPORT_SYMBOL_GPL(ps3stor_setup); |
234 | |
235 | |
236 | /** |
237 | * ps3stor_teardown - Tear down a storage device after use |
238 | * @dev: Pointer to a struct ps3_storage_device |
239 | */ |
240 | void ps3stor_teardown(struct ps3_storage_device *dev) |
241 | { |
242 | int error; |
243 | |
244 | dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, |
245 | DMA_BIDIRECTIONAL); |
246 | ps3_dma_region_free(&dev->dma_region); |
247 | |
248 | free_irq(dev->irq, dev); |
249 | |
250 | error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); |
251 | if (error) |
252 | dev_err(&dev->sbd.core, |
253 | "%s:%u: destroy event receive port failed %d\n", |
254 | __func__, __LINE__, error); |
255 | |
256 | error = ps3stor_close_hv_device(&dev->sbd); |
257 | if (error) |
258 | dev_err(&dev->sbd.core, |
259 | "%s:%u: ps3_close_hv_device failed %d\n", __func__, |
260 | __LINE__, error); |
261 | } |
262 | EXPORT_SYMBOL_GPL(ps3stor_teardown); |
263 | |
264 | |
265 | /** |
266 | * ps3stor_read_write_sectors - read/write from/to a storage device |
267 | * @dev: Pointer to a struct ps3_storage_device |
268 | * @lpar: HV logical partition address |
269 | * @start_sector: First sector to read/write |
270 | * @sectors: Number of sectors to read/write |
271 | * @write: Flag indicating write (non-zero) or read (zero) |
272 | * |
273 | * Returns 0 for success, -1 in case of failure to submit the command, or |
274 | * an LV1 status value in case of other errors |
275 | */ |
276 | u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar, |
277 | u64 start_sector, u64 sectors, int write) |
278 | { |
279 | unsigned int region_id = dev->regions[dev->region_idx].id; |
280 | const char *op = write ? "write" : "read"; |
281 | int res; |
282 | |
283 | dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n", |
284 | __func__, __LINE__, op, sectors, start_sector); |
285 | |
286 | init_completion(&dev->done); |
287 | res = write ? lv1_storage_write(dev->sbd.dev_id, region_id, |
288 | start_sector, sectors, 0, lpar, |
289 | &dev->tag) |
290 | : lv1_storage_read(dev->sbd.dev_id, region_id, |
291 | start_sector, sectors, 0, lpar, |
292 | &dev->tag); |
293 | if (res) { |
294 | dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, |
295 | __LINE__, op, res); |
296 | return -1; |
297 | } |
298 | |
299 | wait_for_completion(&dev->done); |
300 | if (dev->lv1_status) { |
301 | dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__, |
302 | __LINE__, op, dev->lv1_status); |
303 | return dev->lv1_status; |
304 | } |
305 | |
306 | dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__, |
307 | op); |
308 | |
309 | return 0; |
310 | } |
311 | EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors); |
312 | |
313 | |
314 | /** |
315 | * ps3stor_send_command - send a device command to a storage device |
316 | * @dev: Pointer to a struct ps3_storage_device |
317 | * @cmd: Command number |
318 | * @arg1: First command argument |
319 | * @arg2: Second command argument |
320 | * @arg3: Third command argument |
321 | * @arg4: Fourth command argument |
322 | * |
323 | * Returns 0 for success, -1 in case of failure to submit the command, or |
324 | * an LV1 status value in case of other errors |
325 | */ |
326 | u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1, |
327 | u64 arg2, u64 arg3, u64 arg4) |
328 | { |
329 | int res; |
330 | |
331 | dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%llx\n", __func__, |
332 | __LINE__, cmd); |
333 | |
334 | init_completion(&dev->done); |
335 | |
336 | res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1, |
337 | arg2, arg3, arg4, &dev->tag); |
338 | if (res) { |
339 | dev_err(&dev->sbd.core, |
340 | "%s:%u: send_device_command 0x%llx failed %d\n", |
341 | __func__, __LINE__, cmd, res); |
342 | return -1; |
343 | } |
344 | |
345 | wait_for_completion(&dev->done); |
346 | if (dev->lv1_status) { |
347 | dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx failed 0x%llx\n", |
348 | __func__, __LINE__, cmd, dev->lv1_status); |
349 | return dev->lv1_status; |
350 | } |
351 | |
352 | dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx completed\n", __func__, |
353 | __LINE__, cmd); |
354 | |
355 | return 0; |
356 | } |
357 | EXPORT_SYMBOL_GPL(ps3stor_send_command); |
358 | |
359 | |
360 | MODULE_LICENSE("GPL"); |
361 | MODULE_DESCRIPTION("PS3 Storage Bus Library"); |
362 | MODULE_AUTHOR("Sony Corporation"); |
363 |
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