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