Commit | Line | Data |
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f58a9d17 GL |
1 | /* |
2 | * PS3 address space management. | |
3 | * | |
4 | * Copyright (C) 2006 Sony Computer Entertainment Inc. | |
5 | * Copyright 2006 Sony Corp. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; version 2 of the License. | |
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 | |
18 | * Foundation, 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/memory_hotplug.h> | |
d9b2b2a2 | 24 | #include <linux/lmb.h> |
f58a9d17 | 25 | |
e22ba7e3 | 26 | #include <asm/firmware.h> |
d9b2b2a2 | 27 | #include <asm/prom.h> |
f58a9d17 | 28 | #include <asm/udbg.h> |
f58a9d17 GL |
29 | #include <asm/lv1call.h> |
30 | ||
31 | #include "platform.h" | |
32 | ||
33 | #if defined(DEBUG) | |
83bb643d | 34 | #define DBG udbg_printf |
f58a9d17 | 35 | #else |
83bb643d | 36 | #define DBG pr_debug |
f58a9d17 GL |
37 | #endif |
38 | ||
39 | enum { | |
f58a9d17 GL |
40 | #if defined(CONFIG_PS3_DYNAMIC_DMA) |
41 | USE_DYNAMIC_DMA = 1, | |
42 | #else | |
43 | USE_DYNAMIC_DMA = 0, | |
44 | #endif | |
45 | }; | |
46 | ||
47 | enum { | |
48 | PAGE_SHIFT_4K = 12U, | |
49 | PAGE_SHIFT_64K = 16U, | |
50 | PAGE_SHIFT_16M = 24U, | |
51 | }; | |
52 | ||
53 | static unsigned long make_page_sizes(unsigned long a, unsigned long b) | |
54 | { | |
55 | return (a << 56) | (b << 48); | |
56 | } | |
57 | ||
58 | enum { | |
59 | ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04, | |
60 | ALLOCATE_MEMORY_ADDR_ZERO = 0X08, | |
61 | }; | |
62 | ||
63 | /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */ | |
64 | ||
65 | enum { | |
66 | HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */ | |
67 | HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */ | |
68 | }; | |
69 | ||
70 | /*============================================================================*/ | |
71 | /* virtual address space routines */ | |
72 | /*============================================================================*/ | |
73 | ||
74 | /** | |
75 | * struct mem_region - memory region structure | |
76 | * @base: base address | |
77 | * @size: size in bytes | |
78 | * @offset: difference between base and rm.size | |
79 | */ | |
80 | ||
81 | struct mem_region { | |
b17b3df1 | 82 | u64 base; |
5418b9c6 | 83 | u64 size; |
f58a9d17 GL |
84 | unsigned long offset; |
85 | }; | |
86 | ||
87 | /** | |
88 | * struct map - address space state variables holder | |
89 | * @total: total memory available as reported by HV | |
90 | * @vas_id - HV virtual address space id | |
91 | * @htab_size: htab size in bytes | |
92 | * | |
93 | * The HV virtual address space (vas) allows for hotplug memory regions. | |
94 | * Memory regions can be created and destroyed in the vas at runtime. | |
95 | * @rm: real mode (bootmem) region | |
96 | * @r1: hotplug memory region(s) | |
97 | * | |
98 | * ps3 addresses | |
99 | * virt_addr: a cpu 'translated' effective address | |
100 | * phys_addr: an address in what Linux thinks is the physical address space | |
101 | * lpar_addr: an address in the HV virtual address space | |
102 | * bus_addr: an io controller 'translated' address on a device bus | |
103 | */ | |
104 | ||
105 | struct map { | |
5418b9c6 | 106 | u64 total; |
b17b3df1 SR |
107 | u64 vas_id; |
108 | u64 htab_size; | |
f58a9d17 GL |
109 | struct mem_region rm; |
110 | struct mem_region r1; | |
111 | }; | |
112 | ||
113 | #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) | |
6bb5cf10 GL |
114 | static void __maybe_unused _debug_dump_map(const struct map *m, |
115 | const char *func, int line) | |
f58a9d17 | 116 | { |
5418b9c6 SR |
117 | DBG("%s:%d: map.total = %llxh\n", func, line, m->total); |
118 | DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size); | |
b17b3df1 SR |
119 | DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id); |
120 | DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size); | |
121 | DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base); | |
f58a9d17 | 122 | DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset); |
5418b9c6 | 123 | DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size); |
f58a9d17 GL |
124 | } |
125 | ||
126 | static struct map map; | |
127 | ||
128 | /** | |
129 | * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address | |
130 | * @phys_addr: linux physical address | |
131 | */ | |
132 | ||
133 | unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr) | |
134 | { | |
135 | BUG_ON(is_kernel_addr(phys_addr)); | |
a628df1e GL |
136 | return (phys_addr < map.rm.size || phys_addr >= map.total) |
137 | ? phys_addr : phys_addr + map.r1.offset; | |
f58a9d17 GL |
138 | } |
139 | ||
140 | EXPORT_SYMBOL(ps3_mm_phys_to_lpar); | |
141 | ||
142 | /** | |
143 | * ps3_mm_vas_create - create the virtual address space | |
144 | */ | |
145 | ||
146 | void __init ps3_mm_vas_create(unsigned long* htab_size) | |
147 | { | |
148 | int result; | |
b17b3df1 SR |
149 | u64 start_address; |
150 | u64 size; | |
151 | u64 access_right; | |
152 | u64 max_page_size; | |
153 | u64 flags; | |
f58a9d17 GL |
154 | |
155 | result = lv1_query_logical_partition_address_region_info(0, | |
156 | &start_address, &size, &access_right, &max_page_size, | |
157 | &flags); | |
158 | ||
159 | if (result) { | |
160 | DBG("%s:%d: lv1_query_logical_partition_address_region_info " | |
161 | "failed: %s\n", __func__, __LINE__, | |
162 | ps3_result(result)); | |
163 | goto fail; | |
164 | } | |
165 | ||
166 | if (max_page_size < PAGE_SHIFT_16M) { | |
b17b3df1 | 167 | DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__, |
f58a9d17 GL |
168 | max_page_size); |
169 | goto fail; | |
170 | } | |
171 | ||
172 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX); | |
173 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN); | |
174 | ||
175 | result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE, | |
176 | 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K), | |
177 | &map.vas_id, &map.htab_size); | |
178 | ||
179 | if (result) { | |
180 | DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n", | |
181 | __func__, __LINE__, ps3_result(result)); | |
182 | goto fail; | |
183 | } | |
184 | ||
185 | result = lv1_select_virtual_address_space(map.vas_id); | |
186 | ||
187 | if (result) { | |
188 | DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n", | |
189 | __func__, __LINE__, ps3_result(result)); | |
190 | goto fail; | |
191 | } | |
192 | ||
193 | *htab_size = map.htab_size; | |
194 | ||
195 | debug_dump_map(&map); | |
196 | ||
197 | return; | |
198 | ||
199 | fail: | |
200 | panic("ps3_mm_vas_create failed"); | |
201 | } | |
202 | ||
203 | /** | |
204 | * ps3_mm_vas_destroy - | |
205 | */ | |
206 | ||
207 | void ps3_mm_vas_destroy(void) | |
208 | { | |
6bb5cf10 GL |
209 | int result; |
210 | ||
b17b3df1 | 211 | DBG("%s:%d: map.vas_id = %llu\n", __func__, __LINE__, map.vas_id); |
6bb5cf10 | 212 | |
f58a9d17 | 213 | if (map.vas_id) { |
6bb5cf10 GL |
214 | result = lv1_select_virtual_address_space(0); |
215 | BUG_ON(result); | |
216 | result = lv1_destruct_virtual_address_space(map.vas_id); | |
217 | BUG_ON(result); | |
f58a9d17 GL |
218 | map.vas_id = 0; |
219 | } | |
220 | } | |
221 | ||
222 | /*============================================================================*/ | |
223 | /* memory hotplug routines */ | |
224 | /*============================================================================*/ | |
225 | ||
226 | /** | |
227 | * ps3_mm_region_create - create a memory region in the vas | |
228 | * @r: pointer to a struct mem_region to accept initialized values | |
229 | * @size: requested region size | |
230 | * | |
231 | * This implementation creates the region with the vas large page size. | |
232 | * @size is rounded down to a multiple of the vas large page size. | |
233 | */ | |
234 | ||
32f44a12 | 235 | static int ps3_mm_region_create(struct mem_region *r, unsigned long size) |
f58a9d17 GL |
236 | { |
237 | int result; | |
b17b3df1 | 238 | u64 muid; |
f58a9d17 GL |
239 | |
240 | r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M); | |
241 | ||
242 | DBG("%s:%d requested %lxh\n", __func__, __LINE__, size); | |
5418b9c6 SR |
243 | DBG("%s:%d actual %llxh\n", __func__, __LINE__, r->size); |
244 | DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__, | |
245 | size - r->size, (size - r->size) / 1024 / 1024); | |
f58a9d17 GL |
246 | |
247 | if (r->size == 0) { | |
248 | DBG("%s:%d: size == 0\n", __func__, __LINE__); | |
249 | result = -1; | |
250 | goto zero_region; | |
251 | } | |
252 | ||
253 | result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0, | |
254 | ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid); | |
255 | ||
256 | if (result || r->base < map.rm.size) { | |
257 | DBG("%s:%d: lv1_allocate_memory failed: %s\n", | |
258 | __func__, __LINE__, ps3_result(result)); | |
259 | goto zero_region; | |
260 | } | |
261 | ||
262 | r->offset = r->base - map.rm.size; | |
263 | return result; | |
264 | ||
265 | zero_region: | |
266 | r->size = r->base = r->offset = 0; | |
267 | return result; | |
268 | } | |
269 | ||
270 | /** | |
271 | * ps3_mm_region_destroy - destroy a memory region | |
272 | * @r: pointer to struct mem_region | |
273 | */ | |
274 | ||
32f44a12 | 275 | static void ps3_mm_region_destroy(struct mem_region *r) |
f58a9d17 | 276 | { |
6bb5cf10 GL |
277 | int result; |
278 | ||
b17b3df1 | 279 | DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base); |
f58a9d17 | 280 | if (r->base) { |
6bb5cf10 GL |
281 | result = lv1_release_memory(r->base); |
282 | BUG_ON(result); | |
f58a9d17 GL |
283 | r->size = r->base = r->offset = 0; |
284 | map.total = map.rm.size; | |
285 | } | |
286 | } | |
287 | ||
288 | /** | |
289 | * ps3_mm_add_memory - hot add memory | |
290 | */ | |
291 | ||
292 | static int __init ps3_mm_add_memory(void) | |
293 | { | |
294 | int result; | |
295 | unsigned long start_addr; | |
296 | unsigned long start_pfn; | |
297 | unsigned long nr_pages; | |
298 | ||
e22ba7e3 | 299 | if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) |
ef596c69 | 300 | return -ENODEV; |
e22ba7e3 | 301 | |
f58a9d17 GL |
302 | BUG_ON(!mem_init_done); |
303 | ||
a628df1e | 304 | start_addr = map.rm.size; |
f58a9d17 GL |
305 | start_pfn = start_addr >> PAGE_SHIFT; |
306 | nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
307 | ||
308 | DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n", | |
309 | __func__, __LINE__, start_addr, start_pfn, nr_pages); | |
310 | ||
311 | result = add_memory(0, start_addr, map.r1.size); | |
312 | ||
313 | if (result) { | |
314 | DBG("%s:%d: add_memory failed: (%d)\n", | |
315 | __func__, __LINE__, result); | |
316 | return result; | |
317 | } | |
318 | ||
ecc240f9 GL |
319 | lmb_add(start_addr, map.r1.size); |
320 | lmb_analyze(); | |
321 | ||
f58a9d17 GL |
322 | result = online_pages(start_pfn, nr_pages); |
323 | ||
324 | if (result) | |
325 | DBG("%s:%d: online_pages failed: (%d)\n", | |
326 | __func__, __LINE__, result); | |
327 | ||
328 | return result; | |
329 | } | |
330 | ||
0047656e | 331 | device_initcall(ps3_mm_add_memory); |
f58a9d17 GL |
332 | |
333 | /*============================================================================*/ | |
334 | /* dma routines */ | |
335 | /*============================================================================*/ | |
336 | ||
337 | /** | |
6bb5cf10 | 338 | * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address. |
f58a9d17 GL |
339 | * @r: pointer to dma region structure |
340 | * @lpar_addr: HV lpar address | |
341 | */ | |
342 | ||
6bb5cf10 | 343 | static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r, |
f58a9d17 GL |
344 | unsigned long lpar_addr) |
345 | { | |
6bb5cf10 GL |
346 | if (lpar_addr >= map.rm.size) |
347 | lpar_addr -= map.r1.offset; | |
348 | BUG_ON(lpar_addr < r->offset); | |
349 | BUG_ON(lpar_addr >= r->offset + r->len); | |
350 | return r->bus_addr + lpar_addr - r->offset; | |
f58a9d17 GL |
351 | } |
352 | ||
353 | #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) | |
6bb5cf10 GL |
354 | static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r, |
355 | const char *func, int line) | |
f58a9d17 | 356 | { |
5c949070 | 357 | DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id, |
6bb5cf10 | 358 | r->dev->dev_id); |
f58a9d17 GL |
359 | DBG("%s:%d: page_size %u\n", func, line, r->page_size); |
360 | DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr); | |
361 | DBG("%s:%d: len %lxh\n", func, line, r->len); | |
6bb5cf10 | 362 | DBG("%s:%d: offset %lxh\n", func, line, r->offset); |
f58a9d17 GL |
363 | } |
364 | ||
6bb5cf10 | 365 | /** |
f58a9d17 GL |
366 | * dma_chunk - A chunk of dma pages mapped by the io controller. |
367 | * @region - The dma region that owns this chunk. | |
368 | * @lpar_addr: Starting lpar address of the area to map. | |
369 | * @bus_addr: Starting ioc bus address of the area to map. | |
370 | * @len: Length in bytes of the area to map. | |
371 | * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the | |
372 | * list of all chuncks owned by the region. | |
373 | * | |
374 | * This implementation uses a very simple dma page manager | |
375 | * based on the dma_chunk structure. This scheme assumes | |
376 | * that all drivers use very well behaved dma ops. | |
377 | */ | |
378 | ||
379 | struct dma_chunk { | |
380 | struct ps3_dma_region *region; | |
381 | unsigned long lpar_addr; | |
382 | unsigned long bus_addr; | |
383 | unsigned long len; | |
384 | struct list_head link; | |
385 | unsigned int usage_count; | |
386 | }; | |
387 | ||
388 | #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__) | |
389 | static void _dma_dump_chunk (const struct dma_chunk* c, const char* func, | |
390 | int line) | |
391 | { | |
5c949070 | 392 | DBG("%s:%d: r.dev %llu:%llu\n", func, line, |
6bb5cf10 | 393 | c->region->dev->bus_id, c->region->dev->dev_id); |
f58a9d17 GL |
394 | DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr); |
395 | DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size); | |
396 | DBG("%s:%d: r.len %lxh\n", func, line, c->region->len); | |
6bb5cf10 | 397 | DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset); |
f58a9d17 GL |
398 | DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr); |
399 | DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr); | |
400 | DBG("%s:%d: c.len %lxh\n", func, line, c->len); | |
401 | } | |
402 | ||
403 | static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r, | |
404 | unsigned long bus_addr, unsigned long len) | |
405 | { | |
406 | struct dma_chunk *c; | |
407 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); | |
6bb5cf10 GL |
408 | unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus, |
409 | 1 << r->page_size); | |
f58a9d17 GL |
410 | |
411 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
412 | /* intersection */ | |
6bb5cf10 GL |
413 | if (aligned_bus >= c->bus_addr && |
414 | aligned_bus + aligned_len <= c->bus_addr + c->len) | |
f58a9d17 | 415 | return c; |
6bb5cf10 | 416 | |
f58a9d17 | 417 | /* below */ |
6bb5cf10 | 418 | if (aligned_bus + aligned_len <= c->bus_addr) |
f58a9d17 | 419 | continue; |
6bb5cf10 | 420 | |
f58a9d17 | 421 | /* above */ |
6bb5cf10 | 422 | if (aligned_bus >= c->bus_addr + c->len) |
f58a9d17 | 423 | continue; |
f58a9d17 GL |
424 | |
425 | /* we don't handle the multi-chunk case for now */ | |
f58a9d17 GL |
426 | dma_dump_chunk(c); |
427 | BUG(); | |
428 | } | |
429 | return NULL; | |
430 | } | |
431 | ||
6bb5cf10 GL |
432 | static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r, |
433 | unsigned long lpar_addr, unsigned long len) | |
434 | { | |
435 | struct dma_chunk *c; | |
436 | unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size); | |
437 | unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar, | |
438 | 1 << r->page_size); | |
439 | ||
440 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
441 | /* intersection */ | |
442 | if (c->lpar_addr <= aligned_lpar && | |
443 | aligned_lpar < c->lpar_addr + c->len) { | |
444 | if (aligned_lpar + aligned_len <= c->lpar_addr + c->len) | |
445 | return c; | |
446 | else { | |
447 | dma_dump_chunk(c); | |
448 | BUG(); | |
449 | } | |
450 | } | |
451 | /* below */ | |
452 | if (aligned_lpar + aligned_len <= c->lpar_addr) { | |
453 | continue; | |
454 | } | |
455 | /* above */ | |
456 | if (c->lpar_addr + c->len <= aligned_lpar) { | |
457 | continue; | |
458 | } | |
459 | } | |
460 | return NULL; | |
461 | } | |
462 | ||
463 | static int dma_sb_free_chunk(struct dma_chunk *c) | |
f58a9d17 GL |
464 | { |
465 | int result = 0; | |
466 | ||
467 | if (c->bus_addr) { | |
6bb5cf10 GL |
468 | result = lv1_unmap_device_dma_region(c->region->dev->bus_id, |
469 | c->region->dev->dev_id, c->bus_addr, c->len); | |
f58a9d17 GL |
470 | BUG_ON(result); |
471 | } | |
472 | ||
473 | kfree(c); | |
474 | return result; | |
475 | } | |
476 | ||
6bb5cf10 GL |
477 | static int dma_ioc0_free_chunk(struct dma_chunk *c) |
478 | { | |
479 | int result = 0; | |
480 | int iopage; | |
481 | unsigned long offset; | |
482 | struct ps3_dma_region *r = c->region; | |
483 | ||
484 | DBG("%s:start\n", __func__); | |
485 | for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) { | |
486 | offset = (1 << r->page_size) * iopage; | |
487 | /* put INVALID entry */ | |
488 | result = lv1_put_iopte(0, | |
489 | c->bus_addr + offset, | |
490 | c->lpar_addr + offset, | |
491 | r->ioid, | |
492 | 0); | |
493 | DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__, | |
494 | c->bus_addr + offset, | |
495 | c->lpar_addr + offset, | |
496 | r->ioid); | |
497 | ||
498 | if (result) { | |
499 | DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__, | |
500 | __LINE__, ps3_result(result)); | |
501 | } | |
502 | } | |
503 | kfree(c); | |
504 | DBG("%s:end\n", __func__); | |
505 | return result; | |
506 | } | |
507 | ||
f58a9d17 | 508 | /** |
6bb5cf10 | 509 | * dma_sb_map_pages - Maps dma pages into the io controller bus address space. |
f58a9d17 GL |
510 | * @r: Pointer to a struct ps3_dma_region. |
511 | * @phys_addr: Starting physical address of the area to map. | |
512 | * @len: Length in bytes of the area to map. | |
513 | * c_out: A pointer to receive an allocated struct dma_chunk for this area. | |
514 | * | |
515 | * This is the lowest level dma mapping routine, and is the one that will | |
516 | * make the HV call to add the pages into the io controller address space. | |
517 | */ | |
518 | ||
6bb5cf10 GL |
519 | static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
520 | unsigned long len, struct dma_chunk **c_out, u64 iopte_flag) | |
f58a9d17 GL |
521 | { |
522 | int result; | |
523 | struct dma_chunk *c; | |
524 | ||
525 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
526 | ||
527 | if (!c) { | |
528 | result = -ENOMEM; | |
529 | goto fail_alloc; | |
530 | } | |
531 | ||
532 | c->region = r; | |
533 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
6bb5cf10 | 534 | c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr); |
f58a9d17 GL |
535 | c->len = len; |
536 | ||
6bb5cf10 GL |
537 | BUG_ON(iopte_flag != 0xf800000000000000UL); |
538 | result = lv1_map_device_dma_region(c->region->dev->bus_id, | |
539 | c->region->dev->dev_id, c->lpar_addr, | |
540 | c->bus_addr, c->len, iopte_flag); | |
f58a9d17 GL |
541 | if (result) { |
542 | DBG("%s:%d: lv1_map_device_dma_region failed: %s\n", | |
543 | __func__, __LINE__, ps3_result(result)); | |
544 | goto fail_map; | |
545 | } | |
546 | ||
547 | list_add(&c->link, &r->chunk_list.head); | |
548 | ||
549 | *c_out = c; | |
550 | return 0; | |
551 | ||
552 | fail_map: | |
553 | kfree(c); | |
554 | fail_alloc: | |
555 | *c_out = NULL; | |
556 | DBG(" <- %s:%d\n", __func__, __LINE__); | |
557 | return result; | |
558 | } | |
559 | ||
6bb5cf10 GL |
560 | static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
561 | unsigned long len, struct dma_chunk **c_out, | |
562 | u64 iopte_flag) | |
563 | { | |
564 | int result; | |
565 | struct dma_chunk *c, *last; | |
566 | int iopage, pages; | |
567 | unsigned long offset; | |
568 | ||
569 | DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__, | |
570 | phys_addr, ps3_mm_phys_to_lpar(phys_addr), len); | |
571 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
572 | ||
573 | if (!c) { | |
574 | result = -ENOMEM; | |
575 | goto fail_alloc; | |
576 | } | |
577 | ||
578 | c->region = r; | |
579 | c->len = len; | |
580 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
581 | /* allocate IO address */ | |
582 | if (list_empty(&r->chunk_list.head)) { | |
583 | /* first one */ | |
584 | c->bus_addr = r->bus_addr; | |
585 | } else { | |
586 | /* derive from last bus addr*/ | |
587 | last = list_entry(r->chunk_list.head.next, | |
588 | struct dma_chunk, link); | |
589 | c->bus_addr = last->bus_addr + last->len; | |
590 | DBG("%s: last bus=%#lx, len=%#lx\n", __func__, | |
591 | last->bus_addr, last->len); | |
592 | } | |
593 | ||
594 | /* FIXME: check whether length exceeds region size */ | |
595 | ||
596 | /* build ioptes for the area */ | |
597 | pages = len >> r->page_size; | |
5c949070 | 598 | DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__, |
6bb5cf10 GL |
599 | r->page_size, r->len, pages, iopte_flag); |
600 | for (iopage = 0; iopage < pages; iopage++) { | |
601 | offset = (1 << r->page_size) * iopage; | |
602 | result = lv1_put_iopte(0, | |
603 | c->bus_addr + offset, | |
604 | c->lpar_addr + offset, | |
605 | r->ioid, | |
606 | iopte_flag); | |
607 | if (result) { | |
608 | printk(KERN_WARNING "%s:%d: lv1_map_device_dma_region " | |
609 | "failed: %s\n", __func__, __LINE__, | |
610 | ps3_result(result)); | |
611 | goto fail_map; | |
612 | } | |
613 | DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__, | |
614 | iopage, c->bus_addr + offset, c->lpar_addr + offset, | |
615 | r->ioid); | |
616 | } | |
617 | ||
618 | /* be sure that last allocated one is inserted at head */ | |
619 | list_add(&c->link, &r->chunk_list.head); | |
620 | ||
621 | *c_out = c; | |
622 | DBG("%s: end\n", __func__); | |
623 | return 0; | |
624 | ||
625 | fail_map: | |
626 | for (iopage--; 0 <= iopage; iopage--) { | |
627 | lv1_put_iopte(0, | |
628 | c->bus_addr + offset, | |
629 | c->lpar_addr + offset, | |
630 | r->ioid, | |
631 | 0); | |
632 | } | |
633 | kfree(c); | |
634 | fail_alloc: | |
635 | *c_out = NULL; | |
636 | return result; | |
637 | } | |
638 | ||
f58a9d17 | 639 | /** |
6bb5cf10 | 640 | * dma_sb_region_create - Create a device dma region. |
f58a9d17 GL |
641 | * @r: Pointer to a struct ps3_dma_region. |
642 | * | |
643 | * This is the lowest level dma region create routine, and is the one that | |
644 | * will make the HV call to create the region. | |
645 | */ | |
646 | ||
6bb5cf10 | 647 | static int dma_sb_region_create(struct ps3_dma_region *r) |
f58a9d17 GL |
648 | { |
649 | int result; | |
b17b3df1 | 650 | u64 bus_addr; |
f58a9d17 | 651 | |
62d80749 | 652 | DBG(" -> %s:%d:\n", __func__, __LINE__); |
6bb5cf10 GL |
653 | |
654 | BUG_ON(!r); | |
655 | ||
656 | if (!r->dev->bus_id) { | |
5c949070 | 657 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
658 | r->dev->bus_id, r->dev->dev_id); |
659 | return 0; | |
660 | } | |
661 | ||
662 | DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__, | |
663 | __LINE__, r->len, r->page_size, r->offset); | |
664 | ||
665 | BUG_ON(!r->len); | |
666 | BUG_ON(!r->page_size); | |
667 | BUG_ON(!r->region_ops); | |
668 | ||
f58a9d17 GL |
669 | INIT_LIST_HEAD(&r->chunk_list.head); |
670 | spin_lock_init(&r->chunk_list.lock); | |
671 | ||
6bb5cf10 GL |
672 | result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
673 | roundup_pow_of_two(r->len), r->page_size, r->region_type, | |
b17b3df1 SR |
674 | &bus_addr); |
675 | r->bus_addr = bus_addr; | |
f58a9d17 GL |
676 | |
677 | if (result) { | |
678 | DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n", | |
679 | __func__, __LINE__, ps3_result(result)); | |
680 | r->len = r->bus_addr = 0; | |
681 | } | |
682 | ||
683 | return result; | |
684 | } | |
685 | ||
6bb5cf10 GL |
686 | static int dma_ioc0_region_create(struct ps3_dma_region *r) |
687 | { | |
688 | int result; | |
b17b3df1 | 689 | u64 bus_addr; |
6bb5cf10 GL |
690 | |
691 | INIT_LIST_HEAD(&r->chunk_list.head); | |
692 | spin_lock_init(&r->chunk_list.lock); | |
693 | ||
694 | result = lv1_allocate_io_segment(0, | |
695 | r->len, | |
696 | r->page_size, | |
b17b3df1 SR |
697 | &bus_addr); |
698 | r->bus_addr = bus_addr; | |
6bb5cf10 GL |
699 | if (result) { |
700 | DBG("%s:%d: lv1_allocate_io_segment failed: %s\n", | |
701 | __func__, __LINE__, ps3_result(result)); | |
702 | r->len = r->bus_addr = 0; | |
703 | } | |
704 | DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__, | |
705 | r->len, r->page_size, r->bus_addr); | |
706 | return result; | |
707 | } | |
708 | ||
f58a9d17 GL |
709 | /** |
710 | * dma_region_free - Free a device dma region. | |
711 | * @r: Pointer to a struct ps3_dma_region. | |
712 | * | |
713 | * This is the lowest level dma region free routine, and is the one that | |
714 | * will make the HV call to free the region. | |
715 | */ | |
716 | ||
6bb5cf10 | 717 | static int dma_sb_region_free(struct ps3_dma_region *r) |
f58a9d17 GL |
718 | { |
719 | int result; | |
720 | struct dma_chunk *c; | |
721 | struct dma_chunk *tmp; | |
722 | ||
6bb5cf10 GL |
723 | BUG_ON(!r); |
724 | ||
725 | if (!r->dev->bus_id) { | |
5c949070 | 726 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
727 | r->dev->bus_id, r->dev->dev_id); |
728 | return 0; | |
729 | } | |
730 | ||
f58a9d17 GL |
731 | list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { |
732 | list_del(&c->link); | |
6bb5cf10 | 733 | dma_sb_free_chunk(c); |
f58a9d17 GL |
734 | } |
735 | ||
6bb5cf10 | 736 | result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
f58a9d17 GL |
737 | r->bus_addr); |
738 | ||
739 | if (result) | |
740 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
741 | __func__, __LINE__, ps3_result(result)); | |
742 | ||
6bb5cf10 GL |
743 | r->bus_addr = 0; |
744 | ||
745 | return result; | |
746 | } | |
747 | ||
748 | static int dma_ioc0_region_free(struct ps3_dma_region *r) | |
749 | { | |
750 | int result; | |
751 | struct dma_chunk *c, *n; | |
752 | ||
753 | DBG("%s: start\n", __func__); | |
754 | list_for_each_entry_safe(c, n, &r->chunk_list.head, link) { | |
755 | list_del(&c->link); | |
756 | dma_ioc0_free_chunk(c); | |
757 | } | |
758 | ||
759 | result = lv1_release_io_segment(0, r->bus_addr); | |
760 | ||
761 | if (result) | |
762 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
763 | __func__, __LINE__, ps3_result(result)); | |
764 | ||
765 | r->bus_addr = 0; | |
766 | DBG("%s: end\n", __func__); | |
f58a9d17 GL |
767 | |
768 | return result; | |
769 | } | |
770 | ||
771 | /** | |
6bb5cf10 | 772 | * dma_sb_map_area - Map an area of memory into a device dma region. |
f58a9d17 GL |
773 | * @r: Pointer to a struct ps3_dma_region. |
774 | * @virt_addr: Starting virtual address of the area to map. | |
775 | * @len: Length in bytes of the area to map. | |
776 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
777 | * map. | |
778 | * | |
779 | * This is the common dma mapping routine. | |
780 | */ | |
781 | ||
6bb5cf10 | 782 | static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 783 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 784 | u64 iopte_flag) |
f58a9d17 GL |
785 | { |
786 | int result; | |
787 | unsigned long flags; | |
788 | struct dma_chunk *c; | |
789 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
790 | : virt_addr; | |
6bb5cf10 GL |
791 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); |
792 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
793 | 1 << r->page_size); | |
794 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); | |
f58a9d17 GL |
795 | |
796 | if (!USE_DYNAMIC_DMA) { | |
797 | unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
798 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
799 | DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__, | |
800 | virt_addr); | |
801 | DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__, | |
802 | phys_addr); | |
803 | DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__, | |
804 | lpar_addr); | |
805 | DBG("%s:%d len %lxh\n", __func__, __LINE__, len); | |
494fd07a | 806 | DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__, |
f58a9d17 GL |
807 | *bus_addr, len); |
808 | } | |
809 | ||
810 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
811 | c = dma_find_chunk(r, *bus_addr, len); | |
812 | ||
813 | if (c) { | |
6bb5cf10 GL |
814 | DBG("%s:%d: reusing mapped chunk", __func__, __LINE__); |
815 | dma_dump_chunk(c); | |
f58a9d17 GL |
816 | c->usage_count++; |
817 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
818 | return 0; | |
819 | } | |
820 | ||
6bb5cf10 | 821 | result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag); |
f58a9d17 GL |
822 | |
823 | if (result) { | |
824 | *bus_addr = 0; | |
6bb5cf10 | 825 | DBG("%s:%d: dma_sb_map_pages failed (%d)\n", |
f58a9d17 GL |
826 | __func__, __LINE__, result); |
827 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
828 | return result; | |
829 | } | |
830 | ||
831 | c->usage_count = 1; | |
832 | ||
833 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
834 | return result; | |
835 | } | |
836 | ||
6bb5cf10 | 837 | static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 838 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 GL |
839 | u64 iopte_flag) |
840 | { | |
841 | int result; | |
842 | unsigned long flags; | |
843 | struct dma_chunk *c; | |
844 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
845 | : virt_addr; | |
846 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); | |
847 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
848 | 1 << r->page_size); | |
849 | ||
850 | DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__, | |
851 | virt_addr, len); | |
852 | DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__, | |
853 | phys_addr, aligned_phys, aligned_len); | |
854 | ||
855 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
856 | c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len); | |
857 | ||
858 | if (c) { | |
859 | /* FIXME */ | |
860 | BUG(); | |
861 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
862 | c->usage_count++; | |
863 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c, | |
868 | iopte_flag); | |
869 | ||
870 | if (result) { | |
871 | *bus_addr = 0; | |
872 | DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n", | |
873 | __func__, __LINE__, result); | |
874 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
875 | return result; | |
876 | } | |
877 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
494fd07a | 878 | DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__, |
6bb5cf10 GL |
879 | virt_addr, phys_addr, aligned_phys, *bus_addr); |
880 | c->usage_count = 1; | |
881 | ||
882 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
883 | return result; | |
884 | } | |
885 | ||
f58a9d17 | 886 | /** |
6bb5cf10 | 887 | * dma_sb_unmap_area - Unmap an area of memory from a device dma region. |
f58a9d17 GL |
888 | * @r: Pointer to a struct ps3_dma_region. |
889 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
890 | * @len: Length in bytes of the area to unmap. | |
891 | * | |
892 | * This is the common dma unmap routine. | |
893 | */ | |
894 | ||
494fd07a | 895 | static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
896 | unsigned long len) |
897 | { | |
898 | unsigned long flags; | |
899 | struct dma_chunk *c; | |
900 | ||
901 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
902 | c = dma_find_chunk(r, bus_addr, len); | |
903 | ||
904 | if (!c) { | |
905 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
906 | 1 << r->page_size); | |
6bb5cf10 GL |
907 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr |
908 | - aligned_bus, 1 << r->page_size); | |
494fd07a | 909 | DBG("%s:%d: not found: bus_addr %llxh\n", |
f58a9d17 GL |
910 | __func__, __LINE__, bus_addr); |
911 | DBG("%s:%d: not found: len %lxh\n", | |
912 | __func__, __LINE__, len); | |
913 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
914 | __func__, __LINE__, aligned_bus); | |
915 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
916 | __func__, __LINE__, aligned_len); | |
917 | BUG(); | |
918 | } | |
919 | ||
920 | c->usage_count--; | |
921 | ||
922 | if (!c->usage_count) { | |
923 | list_del(&c->link); | |
6bb5cf10 | 924 | dma_sb_free_chunk(c); |
f58a9d17 GL |
925 | } |
926 | ||
927 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
928 | return 0; | |
929 | } | |
930 | ||
32f44a12 | 931 | static int dma_ioc0_unmap_area(struct ps3_dma_region *r, |
494fd07a | 932 | dma_addr_t bus_addr, unsigned long len) |
6bb5cf10 GL |
933 | { |
934 | unsigned long flags; | |
935 | struct dma_chunk *c; | |
936 | ||
494fd07a | 937 | DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len); |
6bb5cf10 GL |
938 | spin_lock_irqsave(&r->chunk_list.lock, flags); |
939 | c = dma_find_chunk(r, bus_addr, len); | |
940 | ||
941 | if (!c) { | |
942 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
943 | 1 << r->page_size); | |
944 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr | |
945 | - aligned_bus, | |
946 | 1 << r->page_size); | |
494fd07a | 947 | DBG("%s:%d: not found: bus_addr %llxh\n", |
6bb5cf10 GL |
948 | __func__, __LINE__, bus_addr); |
949 | DBG("%s:%d: not found: len %lxh\n", | |
950 | __func__, __LINE__, len); | |
951 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
952 | __func__, __LINE__, aligned_bus); | |
953 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
954 | __func__, __LINE__, aligned_len); | |
955 | BUG(); | |
956 | } | |
957 | ||
958 | c->usage_count--; | |
959 | ||
960 | if (!c->usage_count) { | |
961 | list_del(&c->link); | |
962 | dma_ioc0_free_chunk(c); | |
963 | } | |
964 | ||
965 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
966 | DBG("%s: end\n", __func__); | |
967 | return 0; | |
968 | } | |
969 | ||
f58a9d17 | 970 | /** |
6bb5cf10 | 971 | * dma_sb_region_create_linear - Setup a linear dma mapping for a device. |
f58a9d17 GL |
972 | * @r: Pointer to a struct ps3_dma_region. |
973 | * | |
974 | * This routine creates an HV dma region for the device and maps all available | |
975 | * ram into the io controller bus address space. | |
976 | */ | |
977 | ||
6bb5cf10 | 978 | static int dma_sb_region_create_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
979 | { |
980 | int result; | |
494fd07a SR |
981 | unsigned long virt_addr, len; |
982 | dma_addr_t tmp; | |
6bb5cf10 GL |
983 | |
984 | if (r->len > 16*1024*1024) { /* FIXME: need proper fix */ | |
985 | /* force 16M dma pages for linear mapping */ | |
986 | if (r->page_size != PS3_DMA_16M) { | |
987 | pr_info("%s:%d: forcing 16M pages for linear map\n", | |
988 | __func__, __LINE__); | |
989 | r->page_size = PS3_DMA_16M; | |
990 | r->len = _ALIGN_UP(r->len, 1 << r->page_size); | |
991 | } | |
f58a9d17 GL |
992 | } |
993 | ||
6bb5cf10 | 994 | result = dma_sb_region_create(r); |
f58a9d17 GL |
995 | BUG_ON(result); |
996 | ||
6bb5cf10 GL |
997 | if (r->offset < map.rm.size) { |
998 | /* Map (part of) 1st RAM chunk */ | |
999 | virt_addr = map.rm.base + r->offset; | |
1000 | len = map.rm.size - r->offset; | |
1001 | if (len > r->len) | |
1002 | len = r->len; | |
1003 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
1004 | IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M); | |
1005 | BUG_ON(result); | |
1006 | } | |
f58a9d17 | 1007 | |
6bb5cf10 GL |
1008 | if (r->offset + r->len > map.rm.size) { |
1009 | /* Map (part of) 2nd RAM chunk */ | |
a628df1e | 1010 | virt_addr = map.rm.size; |
6bb5cf10 GL |
1011 | len = r->len; |
1012 | if (r->offset >= map.rm.size) | |
1013 | virt_addr += r->offset - map.rm.size; | |
1014 | else | |
1015 | len -= map.rm.size - r->offset; | |
1016 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
1017 | IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M); | |
1018 | BUG_ON(result); | |
1019 | } | |
f58a9d17 GL |
1020 | |
1021 | return result; | |
1022 | } | |
1023 | ||
1024 | /** | |
6bb5cf10 | 1025 | * dma_sb_region_free_linear - Free a linear dma mapping for a device. |
f58a9d17 GL |
1026 | * @r: Pointer to a struct ps3_dma_region. |
1027 | * | |
1028 | * This routine will unmap all mapped areas and free the HV dma region. | |
1029 | */ | |
1030 | ||
6bb5cf10 | 1031 | static int dma_sb_region_free_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
1032 | { |
1033 | int result; | |
494fd07a SR |
1034 | dma_addr_t bus_addr; |
1035 | unsigned long len, lpar_addr; | |
6bb5cf10 GL |
1036 | |
1037 | if (r->offset < map.rm.size) { | |
1038 | /* Unmap (part of) 1st RAM chunk */ | |
1039 | lpar_addr = map.rm.base + r->offset; | |
1040 | len = map.rm.size - r->offset; | |
1041 | if (len > r->len) | |
1042 | len = r->len; | |
1043 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1044 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1045 | BUG_ON(result); | |
1046 | } | |
f58a9d17 | 1047 | |
6bb5cf10 GL |
1048 | if (r->offset + r->len > map.rm.size) { |
1049 | /* Unmap (part of) 2nd RAM chunk */ | |
1050 | lpar_addr = map.r1.base; | |
1051 | len = r->len; | |
1052 | if (r->offset >= map.rm.size) | |
1053 | lpar_addr += r->offset - map.rm.size; | |
1054 | else | |
1055 | len -= map.rm.size - r->offset; | |
1056 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1057 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1058 | BUG_ON(result); | |
1059 | } | |
f58a9d17 | 1060 | |
6bb5cf10 | 1061 | result = dma_sb_region_free(r); |
f58a9d17 GL |
1062 | BUG_ON(result); |
1063 | ||
1064 | return result; | |
1065 | } | |
1066 | ||
1067 | /** | |
6bb5cf10 | 1068 | * dma_sb_map_area_linear - Map an area of memory into a device dma region. |
f58a9d17 GL |
1069 | * @r: Pointer to a struct ps3_dma_region. |
1070 | * @virt_addr: Starting virtual address of the area to map. | |
1071 | * @len: Length in bytes of the area to map. | |
1072 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
1073 | * map. | |
1074 | * | |
6bb5cf10 | 1075 | * This routine just returns the corresponding bus address. Actual mapping |
f58a9d17 GL |
1076 | * occurs in dma_region_create_linear(). |
1077 | */ | |
1078 | ||
6bb5cf10 | 1079 | static int dma_sb_map_area_linear(struct ps3_dma_region *r, |
494fd07a | 1080 | unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1081 | u64 iopte_flag) |
f58a9d17 GL |
1082 | { |
1083 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
1084 | : virt_addr; | |
6bb5cf10 | 1085 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); |
f58a9d17 GL |
1086 | return 0; |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * dma_unmap_area_linear - Unmap an area of memory from a device dma region. | |
1091 | * @r: Pointer to a struct ps3_dma_region. | |
1092 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
1093 | * @len: Length in bytes of the area to unmap. | |
1094 | * | |
6bb5cf10 | 1095 | * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear(). |
f58a9d17 GL |
1096 | */ |
1097 | ||
6bb5cf10 | 1098 | static int dma_sb_unmap_area_linear(struct ps3_dma_region *r, |
494fd07a | 1099 | dma_addr_t bus_addr, unsigned long len) |
f58a9d17 GL |
1100 | { |
1101 | return 0; | |
6bb5cf10 GL |
1102 | }; |
1103 | ||
1104 | static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = { | |
1105 | .create = dma_sb_region_create, | |
1106 | .free = dma_sb_region_free, | |
1107 | .map = dma_sb_map_area, | |
1108 | .unmap = dma_sb_unmap_area | |
1109 | }; | |
1110 | ||
1111 | static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = { | |
1112 | .create = dma_sb_region_create_linear, | |
1113 | .free = dma_sb_region_free_linear, | |
1114 | .map = dma_sb_map_area_linear, | |
1115 | .unmap = dma_sb_unmap_area_linear | |
1116 | }; | |
1117 | ||
1118 | static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = { | |
1119 | .create = dma_ioc0_region_create, | |
1120 | .free = dma_ioc0_region_free, | |
1121 | .map = dma_ioc0_map_area, | |
1122 | .unmap = dma_ioc0_unmap_area | |
1123 | }; | |
1124 | ||
1125 | int ps3_dma_region_init(struct ps3_system_bus_device *dev, | |
1126 | struct ps3_dma_region *r, enum ps3_dma_page_size page_size, | |
1127 | enum ps3_dma_region_type region_type, void *addr, unsigned long len) | |
1128 | { | |
1129 | unsigned long lpar_addr; | |
1130 | ||
1131 | lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; | |
1132 | ||
1133 | r->dev = dev; | |
1134 | r->page_size = page_size; | |
1135 | r->region_type = region_type; | |
1136 | r->offset = lpar_addr; | |
1137 | if (r->offset >= map.rm.size) | |
1138 | r->offset -= map.r1.offset; | |
1139 | r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size); | |
1140 | ||
1141 | switch (dev->dev_type) { | |
1142 | case PS3_DEVICE_TYPE_SB: | |
1143 | r->region_ops = (USE_DYNAMIC_DMA) | |
1144 | ? &ps3_dma_sb_region_ops | |
1145 | : &ps3_dma_sb_region_linear_ops; | |
1146 | break; | |
1147 | case PS3_DEVICE_TYPE_IOC0: | |
1148 | r->region_ops = &ps3_dma_ioc0_region_ops; | |
1149 | break; | |
1150 | default: | |
1151 | BUG(); | |
1152 | return -EINVAL; | |
1153 | } | |
1154 | return 0; | |
f58a9d17 | 1155 | } |
6bb5cf10 | 1156 | EXPORT_SYMBOL(ps3_dma_region_init); |
f58a9d17 GL |
1157 | |
1158 | int ps3_dma_region_create(struct ps3_dma_region *r) | |
1159 | { | |
6bb5cf10 GL |
1160 | BUG_ON(!r); |
1161 | BUG_ON(!r->region_ops); | |
1162 | BUG_ON(!r->region_ops->create); | |
1163 | return r->region_ops->create(r); | |
f58a9d17 | 1164 | } |
6bb5cf10 | 1165 | EXPORT_SYMBOL(ps3_dma_region_create); |
f58a9d17 GL |
1166 | |
1167 | int ps3_dma_region_free(struct ps3_dma_region *r) | |
1168 | { | |
6bb5cf10 GL |
1169 | BUG_ON(!r); |
1170 | BUG_ON(!r->region_ops); | |
1171 | BUG_ON(!r->region_ops->free); | |
1172 | return r->region_ops->free(r); | |
f58a9d17 | 1173 | } |
6bb5cf10 | 1174 | EXPORT_SYMBOL(ps3_dma_region_free); |
f58a9d17 GL |
1175 | |
1176 | int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, | |
494fd07a | 1177 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1178 | u64 iopte_flag) |
f58a9d17 | 1179 | { |
6bb5cf10 | 1180 | return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag); |
f58a9d17 GL |
1181 | } |
1182 | ||
494fd07a | 1183 | int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
1184 | unsigned long len) |
1185 | { | |
6bb5cf10 | 1186 | return r->region_ops->unmap(r, bus_addr, len); |
f58a9d17 GL |
1187 | } |
1188 | ||
1189 | /*============================================================================*/ | |
1190 | /* system startup routines */ | |
1191 | /*============================================================================*/ | |
1192 | ||
1193 | /** | |
1194 | * ps3_mm_init - initialize the address space state variables | |
1195 | */ | |
1196 | ||
1197 | void __init ps3_mm_init(void) | |
1198 | { | |
1199 | int result; | |
1200 | ||
1201 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
1202 | ||
1203 | result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size, | |
1204 | &map.total); | |
1205 | ||
1206 | if (result) | |
1207 | panic("ps3_repository_read_mm_info() failed"); | |
1208 | ||
1209 | map.rm.offset = map.rm.base; | |
1210 | map.vas_id = map.htab_size = 0; | |
1211 | ||
1212 | /* this implementation assumes map.rm.base is zero */ | |
1213 | ||
1214 | BUG_ON(map.rm.base); | |
1215 | BUG_ON(!map.rm.size); | |
1216 | ||
f58a9d17 GL |
1217 | |
1218 | /* arrange to do this in ps3_mm_add_memory */ | |
1219 | ps3_mm_region_create(&map.r1, map.total - map.rm.size); | |
1220 | ||
6bb5cf10 GL |
1221 | /* correct map.total for the real total amount of memory we use */ |
1222 | map.total = map.rm.size + map.r1.size; | |
1223 | ||
f58a9d17 GL |
1224 | DBG(" <- %s:%d\n", __func__, __LINE__); |
1225 | } | |
1226 | ||
1227 | /** | |
1228 | * ps3_mm_shutdown - final cleanup of address space | |
1229 | */ | |
1230 | ||
1231 | void ps3_mm_shutdown(void) | |
1232 | { | |
1233 | ps3_mm_region_destroy(&map.r1); | |
f58a9d17 | 1234 | } |