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> | |
4b16f8e2 | 22 | #include <linux/export.h> |
95f72d1e | 23 | #include <linux/memblock.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
f58a9d17 | 25 | |
9413c883 | 26 | #include <asm/cell-regs.h> |
e22ba7e3 | 27 | #include <asm/firmware.h> |
d9b2b2a2 | 28 | #include <asm/prom.h> |
f58a9d17 | 29 | #include <asm/udbg.h> |
f58a9d17 | 30 | #include <asm/lv1call.h> |
ae3a197e | 31 | #include <asm/setup.h> |
f58a9d17 GL |
32 | |
33 | #include "platform.h" | |
34 | ||
35 | #if defined(DEBUG) | |
83bb643d | 36 | #define DBG udbg_printf |
f58a9d17 | 37 | #else |
7424639a | 38 | #define DBG pr_devel |
f58a9d17 GL |
39 | #endif |
40 | ||
41 | enum { | |
f58a9d17 GL |
42 | #if defined(CONFIG_PS3_DYNAMIC_DMA) |
43 | USE_DYNAMIC_DMA = 1, | |
44 | #else | |
45 | USE_DYNAMIC_DMA = 0, | |
46 | #endif | |
47 | }; | |
48 | ||
49 | enum { | |
50 | PAGE_SHIFT_4K = 12U, | |
51 | PAGE_SHIFT_64K = 16U, | |
52 | PAGE_SHIFT_16M = 24U, | |
53 | }; | |
54 | ||
55 | static unsigned long make_page_sizes(unsigned long a, unsigned long b) | |
56 | { | |
57 | return (a << 56) | (b << 48); | |
58 | } | |
59 | ||
60 | enum { | |
61 | ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04, | |
62 | ALLOCATE_MEMORY_ADDR_ZERO = 0X08, | |
63 | }; | |
64 | ||
65 | /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */ | |
66 | ||
67 | enum { | |
68 | HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */ | |
69 | HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */ | |
70 | }; | |
71 | ||
72 | /*============================================================================*/ | |
73 | /* virtual address space routines */ | |
74 | /*============================================================================*/ | |
75 | ||
76 | /** | |
77 | * struct mem_region - memory region structure | |
78 | * @base: base address | |
79 | * @size: size in bytes | |
80 | * @offset: difference between base and rm.size | |
1e755c09 | 81 | * @destroy: flag if region should be destroyed upon shutdown |
f58a9d17 GL |
82 | */ |
83 | ||
84 | struct mem_region { | |
b17b3df1 | 85 | u64 base; |
5418b9c6 | 86 | u64 size; |
f58a9d17 | 87 | unsigned long offset; |
1e755c09 | 88 | int destroy; |
f58a9d17 GL |
89 | }; |
90 | ||
91 | /** | |
92 | * struct map - address space state variables holder | |
93 | * @total: total memory available as reported by HV | |
94 | * @vas_id - HV virtual address space id | |
95 | * @htab_size: htab size in bytes | |
96 | * | |
97 | * The HV virtual address space (vas) allows for hotplug memory regions. | |
98 | * Memory regions can be created and destroyed in the vas at runtime. | |
99 | * @rm: real mode (bootmem) region | |
8ac5fd11 | 100 | * @r1: highmem region(s) |
f58a9d17 GL |
101 | * |
102 | * ps3 addresses | |
103 | * virt_addr: a cpu 'translated' effective address | |
104 | * phys_addr: an address in what Linux thinks is the physical address space | |
105 | * lpar_addr: an address in the HV virtual address space | |
106 | * bus_addr: an io controller 'translated' address on a device bus | |
107 | */ | |
108 | ||
109 | struct map { | |
5418b9c6 | 110 | u64 total; |
b17b3df1 SR |
111 | u64 vas_id; |
112 | u64 htab_size; | |
f58a9d17 GL |
113 | struct mem_region rm; |
114 | struct mem_region r1; | |
115 | }; | |
116 | ||
117 | #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__) | |
6bb5cf10 GL |
118 | static void __maybe_unused _debug_dump_map(const struct map *m, |
119 | const char *func, int line) | |
f58a9d17 | 120 | { |
5418b9c6 SR |
121 | DBG("%s:%d: map.total = %llxh\n", func, line, m->total); |
122 | DBG("%s:%d: map.rm.size = %llxh\n", func, line, m->rm.size); | |
b17b3df1 SR |
123 | DBG("%s:%d: map.vas_id = %llu\n", func, line, m->vas_id); |
124 | DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size); | |
125 | DBG("%s:%d: map.r1.base = %llxh\n", func, line, m->r1.base); | |
f58a9d17 | 126 | DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset); |
5418b9c6 | 127 | DBG("%s:%d: map.r1.size = %llxh\n", func, line, m->r1.size); |
f58a9d17 GL |
128 | } |
129 | ||
130 | static struct map map; | |
131 | ||
132 | /** | |
133 | * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address | |
134 | * @phys_addr: linux physical address | |
135 | */ | |
136 | ||
137 | unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr) | |
138 | { | |
139 | BUG_ON(is_kernel_addr(phys_addr)); | |
a628df1e GL |
140 | return (phys_addr < map.rm.size || phys_addr >= map.total) |
141 | ? phys_addr : phys_addr + map.r1.offset; | |
f58a9d17 GL |
142 | } |
143 | ||
144 | EXPORT_SYMBOL(ps3_mm_phys_to_lpar); | |
145 | ||
146 | /** | |
147 | * ps3_mm_vas_create - create the virtual address space | |
148 | */ | |
149 | ||
150 | void __init ps3_mm_vas_create(unsigned long* htab_size) | |
151 | { | |
152 | int result; | |
b17b3df1 SR |
153 | u64 start_address; |
154 | u64 size; | |
155 | u64 access_right; | |
156 | u64 max_page_size; | |
157 | u64 flags; | |
f58a9d17 GL |
158 | |
159 | result = lv1_query_logical_partition_address_region_info(0, | |
160 | &start_address, &size, &access_right, &max_page_size, | |
161 | &flags); | |
162 | ||
163 | if (result) { | |
164 | DBG("%s:%d: lv1_query_logical_partition_address_region_info " | |
165 | "failed: %s\n", __func__, __LINE__, | |
166 | ps3_result(result)); | |
167 | goto fail; | |
168 | } | |
169 | ||
170 | if (max_page_size < PAGE_SHIFT_16M) { | |
b17b3df1 | 171 | DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__, |
f58a9d17 GL |
172 | max_page_size); |
173 | goto fail; | |
174 | } | |
175 | ||
176 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX); | |
177 | BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN); | |
178 | ||
179 | result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE, | |
180 | 2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K), | |
181 | &map.vas_id, &map.htab_size); | |
182 | ||
183 | if (result) { | |
184 | DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n", | |
185 | __func__, __LINE__, ps3_result(result)); | |
186 | goto fail; | |
187 | } | |
188 | ||
189 | result = lv1_select_virtual_address_space(map.vas_id); | |
190 | ||
191 | if (result) { | |
192 | DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n", | |
193 | __func__, __LINE__, ps3_result(result)); | |
194 | goto fail; | |
195 | } | |
196 | ||
197 | *htab_size = map.htab_size; | |
198 | ||
199 | debug_dump_map(&map); | |
200 | ||
201 | return; | |
202 | ||
203 | fail: | |
204 | panic("ps3_mm_vas_create failed"); | |
205 | } | |
206 | ||
207 | /** | |
208 | * ps3_mm_vas_destroy - | |
209 | */ | |
210 | ||
211 | void ps3_mm_vas_destroy(void) | |
212 | { | |
6bb5cf10 GL |
213 | int result; |
214 | ||
b17b3df1 | 215 | DBG("%s:%d: map.vas_id = %llu\n", __func__, __LINE__, map.vas_id); |
6bb5cf10 | 216 | |
f58a9d17 | 217 | if (map.vas_id) { |
6bb5cf10 GL |
218 | result = lv1_select_virtual_address_space(0); |
219 | BUG_ON(result); | |
220 | result = lv1_destruct_virtual_address_space(map.vas_id); | |
221 | BUG_ON(result); | |
f58a9d17 GL |
222 | map.vas_id = 0; |
223 | } | |
224 | } | |
225 | ||
f58a9d17 GL |
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 | ||
1e755c09 | 262 | r->destroy = 1; |
f58a9d17 GL |
263 | r->offset = r->base - map.rm.size; |
264 | return result; | |
265 | ||
266 | zero_region: | |
267 | r->size = r->base = r->offset = 0; | |
268 | return result; | |
269 | } | |
270 | ||
271 | /** | |
272 | * ps3_mm_region_destroy - destroy a memory region | |
273 | * @r: pointer to struct mem_region | |
274 | */ | |
275 | ||
32f44a12 | 276 | static void ps3_mm_region_destroy(struct mem_region *r) |
f58a9d17 | 277 | { |
6bb5cf10 GL |
278 | int result; |
279 | ||
1e755c09 AH |
280 | if (!r->destroy) { |
281 | pr_info("%s:%d: Not destroying high region: %llxh %llxh\n", | |
282 | __func__, __LINE__, r->base, r->size); | |
283 | return; | |
284 | } | |
285 | ||
b17b3df1 | 286 | DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base); |
1e755c09 | 287 | |
f58a9d17 | 288 | if (r->base) { |
6bb5cf10 GL |
289 | result = lv1_release_memory(r->base); |
290 | BUG_ON(result); | |
f58a9d17 GL |
291 | r->size = r->base = r->offset = 0; |
292 | map.total = map.rm.size; | |
293 | } | |
294 | } | |
295 | ||
1e755c09 AH |
296 | static int ps3_mm_get_repository_highmem(struct mem_region *r) |
297 | { | |
298 | int result; | |
299 | ||
300 | /* Assume a single highmem region. */ | |
301 | ||
302 | result = ps3_repository_read_highmem_info(0, &r->base, &r->size); | |
303 | ||
304 | if (result) | |
305 | goto zero_region; | |
306 | ||
307 | if (!r->base || !r->size) { | |
308 | result = -1; | |
309 | goto zero_region; | |
310 | } | |
311 | ||
312 | r->offset = r->base - map.rm.size; | |
313 | ||
314 | DBG("%s:%d: Found high region in repository: %llxh %llxh\n", | |
315 | __func__, __LINE__, r->base, r->size); | |
316 | ||
317 | return 0; | |
318 | ||
319 | zero_region: | |
320 | DBG("%s:%d: No high region in repository.\n", __func__, __LINE__); | |
321 | ||
322 | r->size = r->base = r->offset = 0; | |
323 | return result; | |
324 | } | |
325 | ||
f58a9d17 GL |
326 | /*============================================================================*/ |
327 | /* dma routines */ | |
328 | /*============================================================================*/ | |
329 | ||
330 | /** | |
6bb5cf10 | 331 | * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address. |
f58a9d17 GL |
332 | * @r: pointer to dma region structure |
333 | * @lpar_addr: HV lpar address | |
334 | */ | |
335 | ||
6bb5cf10 | 336 | static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r, |
f58a9d17 GL |
337 | unsigned long lpar_addr) |
338 | { | |
6bb5cf10 GL |
339 | if (lpar_addr >= map.rm.size) |
340 | lpar_addr -= map.r1.offset; | |
341 | BUG_ON(lpar_addr < r->offset); | |
342 | BUG_ON(lpar_addr >= r->offset + r->len); | |
343 | return r->bus_addr + lpar_addr - r->offset; | |
f58a9d17 GL |
344 | } |
345 | ||
346 | #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__) | |
6bb5cf10 GL |
347 | static void __maybe_unused _dma_dump_region(const struct ps3_dma_region *r, |
348 | const char *func, int line) | |
f58a9d17 | 349 | { |
5c949070 | 350 | DBG("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id, |
6bb5cf10 | 351 | r->dev->dev_id); |
f58a9d17 GL |
352 | DBG("%s:%d: page_size %u\n", func, line, r->page_size); |
353 | DBG("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr); | |
354 | DBG("%s:%d: len %lxh\n", func, line, r->len); | |
6bb5cf10 | 355 | DBG("%s:%d: offset %lxh\n", func, line, r->offset); |
f58a9d17 GL |
356 | } |
357 | ||
6bb5cf10 | 358 | /** |
f58a9d17 GL |
359 | * dma_chunk - A chunk of dma pages mapped by the io controller. |
360 | * @region - The dma region that owns this chunk. | |
361 | * @lpar_addr: Starting lpar address of the area to map. | |
362 | * @bus_addr: Starting ioc bus address of the area to map. | |
363 | * @len: Length in bytes of the area to map. | |
364 | * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the | |
365 | * list of all chuncks owned by the region. | |
366 | * | |
367 | * This implementation uses a very simple dma page manager | |
368 | * based on the dma_chunk structure. This scheme assumes | |
369 | * that all drivers use very well behaved dma ops. | |
370 | */ | |
371 | ||
372 | struct dma_chunk { | |
373 | struct ps3_dma_region *region; | |
374 | unsigned long lpar_addr; | |
375 | unsigned long bus_addr; | |
376 | unsigned long len; | |
377 | struct list_head link; | |
378 | unsigned int usage_count; | |
379 | }; | |
380 | ||
381 | #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__) | |
382 | static void _dma_dump_chunk (const struct dma_chunk* c, const char* func, | |
383 | int line) | |
384 | { | |
5c949070 | 385 | DBG("%s:%d: r.dev %llu:%llu\n", func, line, |
6bb5cf10 | 386 | c->region->dev->bus_id, c->region->dev->dev_id); |
f58a9d17 GL |
387 | DBG("%s:%d: r.bus_addr %lxh\n", func, line, c->region->bus_addr); |
388 | DBG("%s:%d: r.page_size %u\n", func, line, c->region->page_size); | |
389 | DBG("%s:%d: r.len %lxh\n", func, line, c->region->len); | |
6bb5cf10 | 390 | DBG("%s:%d: r.offset %lxh\n", func, line, c->region->offset); |
f58a9d17 GL |
391 | DBG("%s:%d: c.lpar_addr %lxh\n", func, line, c->lpar_addr); |
392 | DBG("%s:%d: c.bus_addr %lxh\n", func, line, c->bus_addr); | |
393 | DBG("%s:%d: c.len %lxh\n", func, line, c->len); | |
394 | } | |
395 | ||
396 | static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r, | |
397 | unsigned long bus_addr, unsigned long len) | |
398 | { | |
399 | struct dma_chunk *c; | |
400 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size); | |
6bb5cf10 GL |
401 | unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus, |
402 | 1 << r->page_size); | |
f58a9d17 GL |
403 | |
404 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
405 | /* intersection */ | |
6bb5cf10 GL |
406 | if (aligned_bus >= c->bus_addr && |
407 | aligned_bus + aligned_len <= c->bus_addr + c->len) | |
f58a9d17 | 408 | return c; |
6bb5cf10 | 409 | |
f58a9d17 | 410 | /* below */ |
6bb5cf10 | 411 | if (aligned_bus + aligned_len <= c->bus_addr) |
f58a9d17 | 412 | continue; |
6bb5cf10 | 413 | |
f58a9d17 | 414 | /* above */ |
6bb5cf10 | 415 | if (aligned_bus >= c->bus_addr + c->len) |
f58a9d17 | 416 | continue; |
f58a9d17 GL |
417 | |
418 | /* we don't handle the multi-chunk case for now */ | |
f58a9d17 GL |
419 | dma_dump_chunk(c); |
420 | BUG(); | |
421 | } | |
422 | return NULL; | |
423 | } | |
424 | ||
6bb5cf10 GL |
425 | static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r, |
426 | unsigned long lpar_addr, unsigned long len) | |
427 | { | |
428 | struct dma_chunk *c; | |
429 | unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size); | |
430 | unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar, | |
431 | 1 << r->page_size); | |
432 | ||
433 | list_for_each_entry(c, &r->chunk_list.head, link) { | |
434 | /* intersection */ | |
435 | if (c->lpar_addr <= aligned_lpar && | |
436 | aligned_lpar < c->lpar_addr + c->len) { | |
437 | if (aligned_lpar + aligned_len <= c->lpar_addr + c->len) | |
438 | return c; | |
439 | else { | |
440 | dma_dump_chunk(c); | |
441 | BUG(); | |
442 | } | |
443 | } | |
444 | /* below */ | |
445 | if (aligned_lpar + aligned_len <= c->lpar_addr) { | |
446 | continue; | |
447 | } | |
448 | /* above */ | |
449 | if (c->lpar_addr + c->len <= aligned_lpar) { | |
450 | continue; | |
451 | } | |
452 | } | |
453 | return NULL; | |
454 | } | |
455 | ||
456 | static int dma_sb_free_chunk(struct dma_chunk *c) | |
f58a9d17 GL |
457 | { |
458 | int result = 0; | |
459 | ||
460 | if (c->bus_addr) { | |
6bb5cf10 GL |
461 | result = lv1_unmap_device_dma_region(c->region->dev->bus_id, |
462 | c->region->dev->dev_id, c->bus_addr, c->len); | |
f58a9d17 GL |
463 | BUG_ON(result); |
464 | } | |
465 | ||
466 | kfree(c); | |
467 | return result; | |
468 | } | |
469 | ||
6bb5cf10 GL |
470 | static int dma_ioc0_free_chunk(struct dma_chunk *c) |
471 | { | |
472 | int result = 0; | |
473 | int iopage; | |
474 | unsigned long offset; | |
475 | struct ps3_dma_region *r = c->region; | |
476 | ||
477 | DBG("%s:start\n", __func__); | |
478 | for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) { | |
479 | offset = (1 << r->page_size) * iopage; | |
480 | /* put INVALID entry */ | |
481 | result = lv1_put_iopte(0, | |
482 | c->bus_addr + offset, | |
483 | c->lpar_addr + offset, | |
484 | r->ioid, | |
485 | 0); | |
486 | DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__, | |
487 | c->bus_addr + offset, | |
488 | c->lpar_addr + offset, | |
489 | r->ioid); | |
490 | ||
491 | if (result) { | |
492 | DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__, | |
493 | __LINE__, ps3_result(result)); | |
494 | } | |
495 | } | |
496 | kfree(c); | |
497 | DBG("%s:end\n", __func__); | |
498 | return result; | |
499 | } | |
500 | ||
f58a9d17 | 501 | /** |
6bb5cf10 | 502 | * dma_sb_map_pages - Maps dma pages into the io controller bus address space. |
f58a9d17 GL |
503 | * @r: Pointer to a struct ps3_dma_region. |
504 | * @phys_addr: Starting physical address of the area to map. | |
505 | * @len: Length in bytes of the area to map. | |
506 | * c_out: A pointer to receive an allocated struct dma_chunk for this area. | |
507 | * | |
508 | * This is the lowest level dma mapping routine, and is the one that will | |
509 | * make the HV call to add the pages into the io controller address space. | |
510 | */ | |
511 | ||
6bb5cf10 GL |
512 | static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
513 | unsigned long len, struct dma_chunk **c_out, u64 iopte_flag) | |
f58a9d17 GL |
514 | { |
515 | int result; | |
516 | struct dma_chunk *c; | |
517 | ||
518 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
519 | ||
520 | if (!c) { | |
521 | result = -ENOMEM; | |
522 | goto fail_alloc; | |
523 | } | |
524 | ||
525 | c->region = r; | |
526 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
6bb5cf10 | 527 | c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr); |
f58a9d17 GL |
528 | c->len = len; |
529 | ||
6bb5cf10 GL |
530 | BUG_ON(iopte_flag != 0xf800000000000000UL); |
531 | result = lv1_map_device_dma_region(c->region->dev->bus_id, | |
532 | c->region->dev->dev_id, c->lpar_addr, | |
533 | c->bus_addr, c->len, iopte_flag); | |
f58a9d17 GL |
534 | if (result) { |
535 | DBG("%s:%d: lv1_map_device_dma_region failed: %s\n", | |
536 | __func__, __LINE__, ps3_result(result)); | |
537 | goto fail_map; | |
538 | } | |
539 | ||
540 | list_add(&c->link, &r->chunk_list.head); | |
541 | ||
542 | *c_out = c; | |
543 | return 0; | |
544 | ||
545 | fail_map: | |
546 | kfree(c); | |
547 | fail_alloc: | |
548 | *c_out = NULL; | |
549 | DBG(" <- %s:%d\n", __func__, __LINE__); | |
550 | return result; | |
551 | } | |
552 | ||
6bb5cf10 GL |
553 | static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, |
554 | unsigned long len, struct dma_chunk **c_out, | |
555 | u64 iopte_flag) | |
556 | { | |
557 | int result; | |
558 | struct dma_chunk *c, *last; | |
559 | int iopage, pages; | |
560 | unsigned long offset; | |
561 | ||
562 | DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__, | |
563 | phys_addr, ps3_mm_phys_to_lpar(phys_addr), len); | |
564 | c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC); | |
565 | ||
566 | if (!c) { | |
567 | result = -ENOMEM; | |
568 | goto fail_alloc; | |
569 | } | |
570 | ||
571 | c->region = r; | |
572 | c->len = len; | |
573 | c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
574 | /* allocate IO address */ | |
575 | if (list_empty(&r->chunk_list.head)) { | |
576 | /* first one */ | |
577 | c->bus_addr = r->bus_addr; | |
578 | } else { | |
579 | /* derive from last bus addr*/ | |
580 | last = list_entry(r->chunk_list.head.next, | |
581 | struct dma_chunk, link); | |
582 | c->bus_addr = last->bus_addr + last->len; | |
583 | DBG("%s: last bus=%#lx, len=%#lx\n", __func__, | |
584 | last->bus_addr, last->len); | |
585 | } | |
586 | ||
587 | /* FIXME: check whether length exceeds region size */ | |
588 | ||
589 | /* build ioptes for the area */ | |
590 | pages = len >> r->page_size; | |
5c949070 | 591 | DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__, |
6bb5cf10 GL |
592 | r->page_size, r->len, pages, iopte_flag); |
593 | for (iopage = 0; iopage < pages; iopage++) { | |
594 | offset = (1 << r->page_size) * iopage; | |
595 | result = lv1_put_iopte(0, | |
596 | c->bus_addr + offset, | |
597 | c->lpar_addr + offset, | |
598 | r->ioid, | |
599 | iopte_flag); | |
600 | if (result) { | |
7e28060a GU |
601 | pr_warning("%s:%d: lv1_put_iopte failed: %s\n", |
602 | __func__, __LINE__, ps3_result(result)); | |
6bb5cf10 GL |
603 | goto fail_map; |
604 | } | |
605 | DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__, | |
606 | iopage, c->bus_addr + offset, c->lpar_addr + offset, | |
607 | r->ioid); | |
608 | } | |
609 | ||
610 | /* be sure that last allocated one is inserted at head */ | |
611 | list_add(&c->link, &r->chunk_list.head); | |
612 | ||
613 | *c_out = c; | |
614 | DBG("%s: end\n", __func__); | |
615 | return 0; | |
616 | ||
617 | fail_map: | |
618 | for (iopage--; 0 <= iopage; iopage--) { | |
619 | lv1_put_iopte(0, | |
620 | c->bus_addr + offset, | |
621 | c->lpar_addr + offset, | |
622 | r->ioid, | |
623 | 0); | |
624 | } | |
625 | kfree(c); | |
626 | fail_alloc: | |
627 | *c_out = NULL; | |
628 | return result; | |
629 | } | |
630 | ||
f58a9d17 | 631 | /** |
6bb5cf10 | 632 | * dma_sb_region_create - Create a device dma region. |
f58a9d17 GL |
633 | * @r: Pointer to a struct ps3_dma_region. |
634 | * | |
635 | * This is the lowest level dma region create routine, and is the one that | |
636 | * will make the HV call to create the region. | |
637 | */ | |
638 | ||
6bb5cf10 | 639 | static int dma_sb_region_create(struct ps3_dma_region *r) |
f58a9d17 GL |
640 | { |
641 | int result; | |
b17b3df1 | 642 | u64 bus_addr; |
f58a9d17 | 643 | |
62d80749 | 644 | DBG(" -> %s:%d:\n", __func__, __LINE__); |
6bb5cf10 GL |
645 | |
646 | BUG_ON(!r); | |
647 | ||
648 | if (!r->dev->bus_id) { | |
5c949070 | 649 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
650 | r->dev->bus_id, r->dev->dev_id); |
651 | return 0; | |
652 | } | |
653 | ||
654 | DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__, | |
655 | __LINE__, r->len, r->page_size, r->offset); | |
656 | ||
657 | BUG_ON(!r->len); | |
658 | BUG_ON(!r->page_size); | |
659 | BUG_ON(!r->region_ops); | |
660 | ||
f58a9d17 GL |
661 | INIT_LIST_HEAD(&r->chunk_list.head); |
662 | spin_lock_init(&r->chunk_list.lock); | |
663 | ||
6bb5cf10 GL |
664 | result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
665 | roundup_pow_of_two(r->len), r->page_size, r->region_type, | |
b17b3df1 SR |
666 | &bus_addr); |
667 | r->bus_addr = bus_addr; | |
f58a9d17 GL |
668 | |
669 | if (result) { | |
670 | DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n", | |
671 | __func__, __LINE__, ps3_result(result)); | |
672 | r->len = r->bus_addr = 0; | |
673 | } | |
674 | ||
675 | return result; | |
676 | } | |
677 | ||
6bb5cf10 GL |
678 | static int dma_ioc0_region_create(struct ps3_dma_region *r) |
679 | { | |
680 | int result; | |
b17b3df1 | 681 | u64 bus_addr; |
6bb5cf10 GL |
682 | |
683 | INIT_LIST_HEAD(&r->chunk_list.head); | |
684 | spin_lock_init(&r->chunk_list.lock); | |
685 | ||
686 | result = lv1_allocate_io_segment(0, | |
687 | r->len, | |
688 | r->page_size, | |
b17b3df1 SR |
689 | &bus_addr); |
690 | r->bus_addr = bus_addr; | |
6bb5cf10 GL |
691 | if (result) { |
692 | DBG("%s:%d: lv1_allocate_io_segment failed: %s\n", | |
693 | __func__, __LINE__, ps3_result(result)); | |
694 | r->len = r->bus_addr = 0; | |
695 | } | |
696 | DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__, | |
697 | r->len, r->page_size, r->bus_addr); | |
698 | return result; | |
699 | } | |
700 | ||
f58a9d17 GL |
701 | /** |
702 | * dma_region_free - Free a device dma region. | |
703 | * @r: Pointer to a struct ps3_dma_region. | |
704 | * | |
705 | * This is the lowest level dma region free routine, and is the one that | |
706 | * will make the HV call to free the region. | |
707 | */ | |
708 | ||
6bb5cf10 | 709 | static int dma_sb_region_free(struct ps3_dma_region *r) |
f58a9d17 GL |
710 | { |
711 | int result; | |
712 | struct dma_chunk *c; | |
713 | struct dma_chunk *tmp; | |
714 | ||
6bb5cf10 GL |
715 | BUG_ON(!r); |
716 | ||
717 | if (!r->dev->bus_id) { | |
5c949070 | 718 | pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__, |
6bb5cf10 GL |
719 | r->dev->bus_id, r->dev->dev_id); |
720 | return 0; | |
721 | } | |
722 | ||
f58a9d17 GL |
723 | list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) { |
724 | list_del(&c->link); | |
6bb5cf10 | 725 | dma_sb_free_chunk(c); |
f58a9d17 GL |
726 | } |
727 | ||
6bb5cf10 | 728 | result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id, |
f58a9d17 GL |
729 | r->bus_addr); |
730 | ||
731 | if (result) | |
732 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
733 | __func__, __LINE__, ps3_result(result)); | |
734 | ||
6bb5cf10 GL |
735 | r->bus_addr = 0; |
736 | ||
737 | return result; | |
738 | } | |
739 | ||
740 | static int dma_ioc0_region_free(struct ps3_dma_region *r) | |
741 | { | |
742 | int result; | |
743 | struct dma_chunk *c, *n; | |
744 | ||
745 | DBG("%s: start\n", __func__); | |
746 | list_for_each_entry_safe(c, n, &r->chunk_list.head, link) { | |
747 | list_del(&c->link); | |
748 | dma_ioc0_free_chunk(c); | |
749 | } | |
750 | ||
751 | result = lv1_release_io_segment(0, r->bus_addr); | |
752 | ||
753 | if (result) | |
754 | DBG("%s:%d: lv1_free_device_dma_region failed: %s\n", | |
755 | __func__, __LINE__, ps3_result(result)); | |
756 | ||
757 | r->bus_addr = 0; | |
758 | DBG("%s: end\n", __func__); | |
f58a9d17 GL |
759 | |
760 | return result; | |
761 | } | |
762 | ||
763 | /** | |
6bb5cf10 | 764 | * dma_sb_map_area - Map an area of memory into a device dma region. |
f58a9d17 GL |
765 | * @r: Pointer to a struct ps3_dma_region. |
766 | * @virt_addr: Starting virtual address of the area to map. | |
767 | * @len: Length in bytes of the area to map. | |
768 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
769 | * map. | |
770 | * | |
771 | * This is the common dma mapping routine. | |
772 | */ | |
773 | ||
6bb5cf10 | 774 | static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 775 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 776 | u64 iopte_flag) |
f58a9d17 GL |
777 | { |
778 | int result; | |
779 | unsigned long flags; | |
780 | struct dma_chunk *c; | |
781 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
782 | : virt_addr; | |
6bb5cf10 GL |
783 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); |
784 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
785 | 1 << r->page_size); | |
786 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); | |
f58a9d17 GL |
787 | |
788 | if (!USE_DYNAMIC_DMA) { | |
789 | unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr); | |
790 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
791 | DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__, | |
792 | virt_addr); | |
793 | DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__, | |
794 | phys_addr); | |
795 | DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__, | |
796 | lpar_addr); | |
797 | DBG("%s:%d len %lxh\n", __func__, __LINE__, len); | |
494fd07a | 798 | DBG("%s:%d bus_addr %llxh (%lxh)\n", __func__, __LINE__, |
f58a9d17 GL |
799 | *bus_addr, len); |
800 | } | |
801 | ||
802 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
803 | c = dma_find_chunk(r, *bus_addr, len); | |
804 | ||
805 | if (c) { | |
6bb5cf10 GL |
806 | DBG("%s:%d: reusing mapped chunk", __func__, __LINE__); |
807 | dma_dump_chunk(c); | |
f58a9d17 GL |
808 | c->usage_count++; |
809 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
810 | return 0; | |
811 | } | |
812 | ||
6bb5cf10 | 813 | result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag); |
f58a9d17 GL |
814 | |
815 | if (result) { | |
816 | *bus_addr = 0; | |
6bb5cf10 | 817 | DBG("%s:%d: dma_sb_map_pages failed (%d)\n", |
f58a9d17 GL |
818 | __func__, __LINE__, result); |
819 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
820 | return result; | |
821 | } | |
822 | ||
823 | c->usage_count = 1; | |
824 | ||
825 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
826 | return result; | |
827 | } | |
828 | ||
6bb5cf10 | 829 | static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr, |
494fd07a | 830 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 GL |
831 | u64 iopte_flag) |
832 | { | |
833 | int result; | |
834 | unsigned long flags; | |
835 | struct dma_chunk *c; | |
836 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
837 | : virt_addr; | |
838 | unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size); | |
839 | unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys, | |
840 | 1 << r->page_size); | |
841 | ||
842 | DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__, | |
843 | virt_addr, len); | |
844 | DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__, | |
845 | phys_addr, aligned_phys, aligned_len); | |
846 | ||
847 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
848 | c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len); | |
849 | ||
850 | if (c) { | |
851 | /* FIXME */ | |
852 | BUG(); | |
853 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
854 | c->usage_count++; | |
855 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c, | |
860 | iopte_flag); | |
861 | ||
862 | if (result) { | |
863 | *bus_addr = 0; | |
864 | DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n", | |
865 | __func__, __LINE__, result); | |
866 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
867 | return result; | |
868 | } | |
869 | *bus_addr = c->bus_addr + phys_addr - aligned_phys; | |
494fd07a | 870 | DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__, |
6bb5cf10 GL |
871 | virt_addr, phys_addr, aligned_phys, *bus_addr); |
872 | c->usage_count = 1; | |
873 | ||
874 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
875 | return result; | |
876 | } | |
877 | ||
f58a9d17 | 878 | /** |
6bb5cf10 | 879 | * dma_sb_unmap_area - Unmap an area of memory from a device dma region. |
f58a9d17 GL |
880 | * @r: Pointer to a struct ps3_dma_region. |
881 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
882 | * @len: Length in bytes of the area to unmap. | |
883 | * | |
884 | * This is the common dma unmap routine. | |
885 | */ | |
886 | ||
494fd07a | 887 | static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
888 | unsigned long len) |
889 | { | |
890 | unsigned long flags; | |
891 | struct dma_chunk *c; | |
892 | ||
893 | spin_lock_irqsave(&r->chunk_list.lock, flags); | |
894 | c = dma_find_chunk(r, bus_addr, len); | |
895 | ||
896 | if (!c) { | |
897 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
898 | 1 << r->page_size); | |
6bb5cf10 GL |
899 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr |
900 | - aligned_bus, 1 << r->page_size); | |
494fd07a | 901 | DBG("%s:%d: not found: bus_addr %llxh\n", |
f58a9d17 GL |
902 | __func__, __LINE__, bus_addr); |
903 | DBG("%s:%d: not found: len %lxh\n", | |
904 | __func__, __LINE__, len); | |
905 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
906 | __func__, __LINE__, aligned_bus); | |
907 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
908 | __func__, __LINE__, aligned_len); | |
909 | BUG(); | |
910 | } | |
911 | ||
912 | c->usage_count--; | |
913 | ||
914 | if (!c->usage_count) { | |
915 | list_del(&c->link); | |
6bb5cf10 | 916 | dma_sb_free_chunk(c); |
f58a9d17 GL |
917 | } |
918 | ||
919 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
920 | return 0; | |
921 | } | |
922 | ||
32f44a12 | 923 | static int dma_ioc0_unmap_area(struct ps3_dma_region *r, |
494fd07a | 924 | dma_addr_t bus_addr, unsigned long len) |
6bb5cf10 GL |
925 | { |
926 | unsigned long flags; | |
927 | struct dma_chunk *c; | |
928 | ||
494fd07a | 929 | DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len); |
6bb5cf10 GL |
930 | spin_lock_irqsave(&r->chunk_list.lock, flags); |
931 | c = dma_find_chunk(r, bus_addr, len); | |
932 | ||
933 | if (!c) { | |
934 | unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, | |
935 | 1 << r->page_size); | |
936 | unsigned long aligned_len = _ALIGN_UP(len + bus_addr | |
937 | - aligned_bus, | |
938 | 1 << r->page_size); | |
494fd07a | 939 | DBG("%s:%d: not found: bus_addr %llxh\n", |
6bb5cf10 GL |
940 | __func__, __LINE__, bus_addr); |
941 | DBG("%s:%d: not found: len %lxh\n", | |
942 | __func__, __LINE__, len); | |
943 | DBG("%s:%d: not found: aligned_bus %lxh\n", | |
944 | __func__, __LINE__, aligned_bus); | |
945 | DBG("%s:%d: not found: aligned_len %lxh\n", | |
946 | __func__, __LINE__, aligned_len); | |
947 | BUG(); | |
948 | } | |
949 | ||
950 | c->usage_count--; | |
951 | ||
952 | if (!c->usage_count) { | |
953 | list_del(&c->link); | |
954 | dma_ioc0_free_chunk(c); | |
955 | } | |
956 | ||
957 | spin_unlock_irqrestore(&r->chunk_list.lock, flags); | |
958 | DBG("%s: end\n", __func__); | |
959 | return 0; | |
960 | } | |
961 | ||
f58a9d17 | 962 | /** |
6bb5cf10 | 963 | * dma_sb_region_create_linear - Setup a linear dma mapping for a device. |
f58a9d17 GL |
964 | * @r: Pointer to a struct ps3_dma_region. |
965 | * | |
966 | * This routine creates an HV dma region for the device and maps all available | |
967 | * ram into the io controller bus address space. | |
968 | */ | |
969 | ||
6bb5cf10 | 970 | static int dma_sb_region_create_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
971 | { |
972 | int result; | |
494fd07a SR |
973 | unsigned long virt_addr, len; |
974 | dma_addr_t tmp; | |
6bb5cf10 GL |
975 | |
976 | if (r->len > 16*1024*1024) { /* FIXME: need proper fix */ | |
977 | /* force 16M dma pages for linear mapping */ | |
978 | if (r->page_size != PS3_DMA_16M) { | |
979 | pr_info("%s:%d: forcing 16M pages for linear map\n", | |
980 | __func__, __LINE__); | |
981 | r->page_size = PS3_DMA_16M; | |
982 | r->len = _ALIGN_UP(r->len, 1 << r->page_size); | |
983 | } | |
f58a9d17 GL |
984 | } |
985 | ||
6bb5cf10 | 986 | result = dma_sb_region_create(r); |
f58a9d17 GL |
987 | BUG_ON(result); |
988 | ||
6bb5cf10 GL |
989 | if (r->offset < map.rm.size) { |
990 | /* Map (part of) 1st RAM chunk */ | |
991 | virt_addr = map.rm.base + r->offset; | |
992 | len = map.rm.size - r->offset; | |
993 | if (len > r->len) | |
994 | len = r->len; | |
995 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
5c6fc8db GU |
996 | CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | |
997 | CBE_IOPTE_M); | |
6bb5cf10 GL |
998 | BUG_ON(result); |
999 | } | |
f58a9d17 | 1000 | |
6bb5cf10 GL |
1001 | if (r->offset + r->len > map.rm.size) { |
1002 | /* Map (part of) 2nd RAM chunk */ | |
a628df1e | 1003 | virt_addr = map.rm.size; |
6bb5cf10 GL |
1004 | len = r->len; |
1005 | if (r->offset >= map.rm.size) | |
1006 | virt_addr += r->offset - map.rm.size; | |
1007 | else | |
1008 | len -= map.rm.size - r->offset; | |
1009 | result = dma_sb_map_area(r, virt_addr, len, &tmp, | |
5c6fc8db GU |
1010 | CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW | |
1011 | CBE_IOPTE_M); | |
6bb5cf10 GL |
1012 | BUG_ON(result); |
1013 | } | |
f58a9d17 GL |
1014 | |
1015 | return result; | |
1016 | } | |
1017 | ||
1018 | /** | |
6bb5cf10 | 1019 | * dma_sb_region_free_linear - Free a linear dma mapping for a device. |
f58a9d17 GL |
1020 | * @r: Pointer to a struct ps3_dma_region. |
1021 | * | |
1022 | * This routine will unmap all mapped areas and free the HV dma region. | |
1023 | */ | |
1024 | ||
6bb5cf10 | 1025 | static int dma_sb_region_free_linear(struct ps3_dma_region *r) |
f58a9d17 GL |
1026 | { |
1027 | int result; | |
494fd07a SR |
1028 | dma_addr_t bus_addr; |
1029 | unsigned long len, lpar_addr; | |
6bb5cf10 GL |
1030 | |
1031 | if (r->offset < map.rm.size) { | |
1032 | /* Unmap (part of) 1st RAM chunk */ | |
1033 | lpar_addr = map.rm.base + r->offset; | |
1034 | len = map.rm.size - r->offset; | |
1035 | if (len > r->len) | |
1036 | len = r->len; | |
1037 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1038 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1039 | BUG_ON(result); | |
1040 | } | |
f58a9d17 | 1041 | |
6bb5cf10 GL |
1042 | if (r->offset + r->len > map.rm.size) { |
1043 | /* Unmap (part of) 2nd RAM chunk */ | |
1044 | lpar_addr = map.r1.base; | |
1045 | len = r->len; | |
1046 | if (r->offset >= map.rm.size) | |
1047 | lpar_addr += r->offset - map.rm.size; | |
1048 | else | |
1049 | len -= map.rm.size - r->offset; | |
1050 | bus_addr = dma_sb_lpar_to_bus(r, lpar_addr); | |
1051 | result = dma_sb_unmap_area(r, bus_addr, len); | |
1052 | BUG_ON(result); | |
1053 | } | |
f58a9d17 | 1054 | |
6bb5cf10 | 1055 | result = dma_sb_region_free(r); |
f58a9d17 GL |
1056 | BUG_ON(result); |
1057 | ||
1058 | return result; | |
1059 | } | |
1060 | ||
1061 | /** | |
6bb5cf10 | 1062 | * dma_sb_map_area_linear - Map an area of memory into a device dma region. |
f58a9d17 GL |
1063 | * @r: Pointer to a struct ps3_dma_region. |
1064 | * @virt_addr: Starting virtual address of the area to map. | |
1065 | * @len: Length in bytes of the area to map. | |
1066 | * @bus_addr: A pointer to return the starting ioc bus address of the area to | |
1067 | * map. | |
1068 | * | |
6bb5cf10 | 1069 | * This routine just returns the corresponding bus address. Actual mapping |
f58a9d17 GL |
1070 | * occurs in dma_region_create_linear(). |
1071 | */ | |
1072 | ||
6bb5cf10 | 1073 | static int dma_sb_map_area_linear(struct ps3_dma_region *r, |
494fd07a | 1074 | unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1075 | u64 iopte_flag) |
f58a9d17 GL |
1076 | { |
1077 | unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr) | |
1078 | : virt_addr; | |
6bb5cf10 | 1079 | *bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr)); |
f58a9d17 GL |
1080 | return 0; |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * dma_unmap_area_linear - Unmap an area of memory from a device dma region. | |
1085 | * @r: Pointer to a struct ps3_dma_region. | |
1086 | * @bus_addr: The starting ioc bus address of the area to unmap. | |
1087 | * @len: Length in bytes of the area to unmap. | |
1088 | * | |
6bb5cf10 | 1089 | * This routine does nothing. Unmapping occurs in dma_sb_region_free_linear(). |
f58a9d17 GL |
1090 | */ |
1091 | ||
6bb5cf10 | 1092 | static int dma_sb_unmap_area_linear(struct ps3_dma_region *r, |
494fd07a | 1093 | dma_addr_t bus_addr, unsigned long len) |
f58a9d17 GL |
1094 | { |
1095 | return 0; | |
6bb5cf10 GL |
1096 | }; |
1097 | ||
1098 | static const struct ps3_dma_region_ops ps3_dma_sb_region_ops = { | |
1099 | .create = dma_sb_region_create, | |
1100 | .free = dma_sb_region_free, | |
1101 | .map = dma_sb_map_area, | |
1102 | .unmap = dma_sb_unmap_area | |
1103 | }; | |
1104 | ||
1105 | static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = { | |
1106 | .create = dma_sb_region_create_linear, | |
1107 | .free = dma_sb_region_free_linear, | |
1108 | .map = dma_sb_map_area_linear, | |
1109 | .unmap = dma_sb_unmap_area_linear | |
1110 | }; | |
1111 | ||
1112 | static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = { | |
1113 | .create = dma_ioc0_region_create, | |
1114 | .free = dma_ioc0_region_free, | |
1115 | .map = dma_ioc0_map_area, | |
1116 | .unmap = dma_ioc0_unmap_area | |
1117 | }; | |
1118 | ||
1119 | int ps3_dma_region_init(struct ps3_system_bus_device *dev, | |
1120 | struct ps3_dma_region *r, enum ps3_dma_page_size page_size, | |
1121 | enum ps3_dma_region_type region_type, void *addr, unsigned long len) | |
1122 | { | |
1123 | unsigned long lpar_addr; | |
1124 | ||
1125 | lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0; | |
1126 | ||
1127 | r->dev = dev; | |
1128 | r->page_size = page_size; | |
1129 | r->region_type = region_type; | |
1130 | r->offset = lpar_addr; | |
1131 | if (r->offset >= map.rm.size) | |
1132 | r->offset -= map.r1.offset; | |
1133 | r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size); | |
1134 | ||
1135 | switch (dev->dev_type) { | |
1136 | case PS3_DEVICE_TYPE_SB: | |
1137 | r->region_ops = (USE_DYNAMIC_DMA) | |
1138 | ? &ps3_dma_sb_region_ops | |
1139 | : &ps3_dma_sb_region_linear_ops; | |
1140 | break; | |
1141 | case PS3_DEVICE_TYPE_IOC0: | |
1142 | r->region_ops = &ps3_dma_ioc0_region_ops; | |
1143 | break; | |
1144 | default: | |
1145 | BUG(); | |
1146 | return -EINVAL; | |
1147 | } | |
1148 | return 0; | |
f58a9d17 | 1149 | } |
6bb5cf10 | 1150 | EXPORT_SYMBOL(ps3_dma_region_init); |
f58a9d17 GL |
1151 | |
1152 | int ps3_dma_region_create(struct ps3_dma_region *r) | |
1153 | { | |
6bb5cf10 GL |
1154 | BUG_ON(!r); |
1155 | BUG_ON(!r->region_ops); | |
1156 | BUG_ON(!r->region_ops->create); | |
1157 | return r->region_ops->create(r); | |
f58a9d17 | 1158 | } |
6bb5cf10 | 1159 | EXPORT_SYMBOL(ps3_dma_region_create); |
f58a9d17 GL |
1160 | |
1161 | int ps3_dma_region_free(struct ps3_dma_region *r) | |
1162 | { | |
6bb5cf10 GL |
1163 | BUG_ON(!r); |
1164 | BUG_ON(!r->region_ops); | |
1165 | BUG_ON(!r->region_ops->free); | |
1166 | return r->region_ops->free(r); | |
f58a9d17 | 1167 | } |
6bb5cf10 | 1168 | EXPORT_SYMBOL(ps3_dma_region_free); |
f58a9d17 GL |
1169 | |
1170 | int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr, | |
494fd07a | 1171 | unsigned long len, dma_addr_t *bus_addr, |
6bb5cf10 | 1172 | u64 iopte_flag) |
f58a9d17 | 1173 | { |
6bb5cf10 | 1174 | return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag); |
f58a9d17 GL |
1175 | } |
1176 | ||
494fd07a | 1177 | int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr, |
f58a9d17 GL |
1178 | unsigned long len) |
1179 | { | |
6bb5cf10 | 1180 | return r->region_ops->unmap(r, bus_addr, len); |
f58a9d17 GL |
1181 | } |
1182 | ||
1183 | /*============================================================================*/ | |
1184 | /* system startup routines */ | |
1185 | /*============================================================================*/ | |
1186 | ||
1187 | /** | |
1188 | * ps3_mm_init - initialize the address space state variables | |
1189 | */ | |
1190 | ||
1191 | void __init ps3_mm_init(void) | |
1192 | { | |
1193 | int result; | |
1194 | ||
1195 | DBG(" -> %s:%d\n", __func__, __LINE__); | |
1196 | ||
1197 | result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size, | |
1198 | &map.total); | |
1199 | ||
1200 | if (result) | |
1201 | panic("ps3_repository_read_mm_info() failed"); | |
1202 | ||
1203 | map.rm.offset = map.rm.base; | |
1204 | map.vas_id = map.htab_size = 0; | |
1205 | ||
1206 | /* this implementation assumes map.rm.base is zero */ | |
1207 | ||
1208 | BUG_ON(map.rm.base); | |
1209 | BUG_ON(!map.rm.size); | |
1210 | ||
1e755c09 | 1211 | /* Check if we got the highmem region from an earlier boot step */ |
f58a9d17 | 1212 | |
1e755c09 AH |
1213 | if (ps3_mm_get_repository_highmem(&map.r1)) |
1214 | ps3_mm_region_create(&map.r1, map.total - map.rm.size); | |
f58a9d17 | 1215 | |
6bb5cf10 GL |
1216 | /* correct map.total for the real total amount of memory we use */ |
1217 | map.total = map.rm.size + map.r1.size; | |
1218 | ||
8ac5fd11 HM |
1219 | if (!map.r1.size) { |
1220 | DBG("%s:%d: No highmem region found\n", __func__, __LINE__); | |
1221 | } else { | |
1222 | DBG("%s:%d: Adding highmem region: %llxh %llxh\n", | |
1223 | __func__, __LINE__, map.rm.size, | |
1224 | map.total - map.rm.size); | |
1225 | memblock_add(map.rm.size, map.total - map.rm.size); | |
1226 | } | |
1227 | ||
f58a9d17 GL |
1228 | DBG(" <- %s:%d\n", __func__, __LINE__); |
1229 | } | |
1230 | ||
1231 | /** | |
1232 | * ps3_mm_shutdown - final cleanup of address space | |
1233 | */ | |
1234 | ||
1235 | void ps3_mm_shutdown(void) | |
1236 | { | |
1237 | ps3_mm_region_destroy(&map.r1); | |
f58a9d17 | 1238 | } |