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/export.h>
23 #include <linux/memory_hotplug.h>
24 #include <linux/memblock.h>
25 #include <linux/slab.h>
26 
27 #include <asm/cell-regs.h>
28 #include <asm/firmware.h>
29 #include <asm/prom.h>
30 #include <asm/udbg.h>
31 #include <asm/lv1call.h>
32 #include <asm/setup.h>
33 
34 #include "platform.h"
35 
36 #if defined(DEBUG)
37 #define DBG udbg_printf
38 #else
39 #define DBG pr_devel
40 #endif
41 
42 enum {
43 #if defined(CONFIG_PS3_DYNAMIC_DMA)
44 	USE_DYNAMIC_DMA = 1,
45 #else
46 	USE_DYNAMIC_DMA = 0,
47 #endif
48 };
49 
50 enum {
51 	PAGE_SHIFT_4K = 12U,
52 	PAGE_SHIFT_64K = 16U,
53 	PAGE_SHIFT_16M = 24U,
54 };
55 
make_page_sizes(unsigned long a,unsigned long b)56 static unsigned long make_page_sizes(unsigned long a, unsigned long b)
57 {
58 	return (a << 56) | (b << 48);
59 }
60 
61 enum {
62 	ALLOCATE_MEMORY_TRY_ALT_UNIT = 0X04,
63 	ALLOCATE_MEMORY_ADDR_ZERO = 0X08,
64 };
65 
66 /* valid htab sizes are {18,19,20} = 256K, 512K, 1M */
67 
68 enum {
69 	HTAB_SIZE_MAX = 20U, /* HV limit of 1MB */
70 	HTAB_SIZE_MIN = 18U, /* CPU limit of 256KB */
71 };
72 
73 /*============================================================================*/
74 /* virtual address space routines                                             */
75 /*============================================================================*/
76 
77 /**
78  * struct mem_region - memory region structure
79  * @base: base address
80  * @size: size in bytes
81  * @offset: difference between base and rm.size
82  */
83 
84 struct mem_region {
85 	u64 base;
86 	u64 size;
87 	unsigned long offset;
88 };
89 
90 /**
91  * struct map - address space state variables holder
92  * @total: total memory available as reported by HV
93  * @vas_id - HV virtual address space id
94  * @htab_size: htab size in bytes
95  *
96  * The HV virtual address space (vas) allows for hotplug memory regions.
97  * Memory regions can be created and destroyed in the vas at runtime.
98  * @rm: real mode (bootmem) region
99  * @r1: hotplug memory region(s)
100  *
101  * ps3 addresses
102  * virt_addr: a cpu 'translated' effective address
103  * phys_addr: an address in what Linux thinks is the physical address space
104  * lpar_addr: an address in the HV virtual address space
105  * bus_addr: an io controller 'translated' address on a device bus
106  */
107 
108 struct map {
109 	u64 total;
110 	u64 vas_id;
111 	u64 htab_size;
112 	struct mem_region rm;
113 	struct mem_region r1;
114 };
115 
116 #define debug_dump_map(x) _debug_dump_map(x, __func__, __LINE__)
_debug_dump_map(const struct map * m,const char * func,int line)117 static void __maybe_unused _debug_dump_map(const struct map *m,
118 	const char *func, int line)
119 {
120 	DBG("%s:%d: map.total     = %llxh\n", func, line, m->total);
121 	DBG("%s:%d: map.rm.size   = %llxh\n", func, line, m->rm.size);
122 	DBG("%s:%d: map.vas_id    = %llu\n", func, line, m->vas_id);
123 	DBG("%s:%d: map.htab_size = %llxh\n", func, line, m->htab_size);
124 	DBG("%s:%d: map.r1.base   = %llxh\n", func, line, m->r1.base);
125 	DBG("%s:%d: map.r1.offset = %lxh\n", func, line, m->r1.offset);
126 	DBG("%s:%d: map.r1.size   = %llxh\n", func, line, m->r1.size);
127 }
128 
129 static struct map map;
130 
131 /**
132  * ps3_mm_phys_to_lpar - translate a linux physical address to lpar address
133  * @phys_addr: linux physical address
134  */
135 
ps3_mm_phys_to_lpar(unsigned long phys_addr)136 unsigned long ps3_mm_phys_to_lpar(unsigned long phys_addr)
137 {
138 	BUG_ON(is_kernel_addr(phys_addr));
139 	return (phys_addr < map.rm.size || phys_addr >= map.total)
140 		? phys_addr : phys_addr + map.r1.offset;
141 }
142 
143 EXPORT_SYMBOL(ps3_mm_phys_to_lpar);
144 
145 /**
146  * ps3_mm_vas_create - create the virtual address space
147  */
148 
ps3_mm_vas_create(unsigned long * htab_size)149 void __init ps3_mm_vas_create(unsigned long* htab_size)
150 {
151 	int result;
152 	u64 start_address;
153 	u64 size;
154 	u64 access_right;
155 	u64 max_page_size;
156 	u64 flags;
157 
158 	result = lv1_query_logical_partition_address_region_info(0,
159 		&start_address, &size, &access_right, &max_page_size,
160 		&flags);
161 
162 	if (result) {
163 		DBG("%s:%d: lv1_query_logical_partition_address_region_info "
164 			"failed: %s\n", __func__, __LINE__,
165 			ps3_result(result));
166 		goto fail;
167 	}
168 
169 	if (max_page_size < PAGE_SHIFT_16M) {
170 		DBG("%s:%d: bad max_page_size %llxh\n", __func__, __LINE__,
171 			max_page_size);
172 		goto fail;
173 	}
174 
175 	BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE > HTAB_SIZE_MAX);
176 	BUILD_BUG_ON(CONFIG_PS3_HTAB_SIZE < HTAB_SIZE_MIN);
177 
178 	result = lv1_construct_virtual_address_space(CONFIG_PS3_HTAB_SIZE,
179 			2, make_page_sizes(PAGE_SHIFT_16M, PAGE_SHIFT_64K),
180 			&map.vas_id, &map.htab_size);
181 
182 	if (result) {
183 		DBG("%s:%d: lv1_construct_virtual_address_space failed: %s\n",
184 			__func__, __LINE__, ps3_result(result));
185 		goto fail;
186 	}
187 
188 	result = lv1_select_virtual_address_space(map.vas_id);
189 
190 	if (result) {
191 		DBG("%s:%d: lv1_select_virtual_address_space failed: %s\n",
192 			__func__, __LINE__, ps3_result(result));
193 		goto fail;
194 	}
195 
196 	*htab_size = map.htab_size;
197 
198 	debug_dump_map(&map);
199 
200 	return;
201 
202 fail:
203 	panic("ps3_mm_vas_create failed");
204 }
205 
206 /**
207  * ps3_mm_vas_destroy -
208  */
209 
ps3_mm_vas_destroy(void)210 void ps3_mm_vas_destroy(void)
211 {
212 	int result;
213 
214 	DBG("%s:%d: map.vas_id    = %llu\n", __func__, __LINE__, map.vas_id);
215 
216 	if (map.vas_id) {
217 		result = lv1_select_virtual_address_space(0);
218 		BUG_ON(result);
219 		result = lv1_destruct_virtual_address_space(map.vas_id);
220 		BUG_ON(result);
221 		map.vas_id = 0;
222 	}
223 }
224 
225 /*============================================================================*/
226 /* memory hotplug routines                                                    */
227 /*============================================================================*/
228 
229 /**
230  * ps3_mm_region_create - create a memory region in the vas
231  * @r: pointer to a struct mem_region to accept initialized values
232  * @size: requested region size
233  *
234  * This implementation creates the region with the vas large page size.
235  * @size is rounded down to a multiple of the vas large page size.
236  */
237 
ps3_mm_region_create(struct mem_region * r,unsigned long size)238 static int ps3_mm_region_create(struct mem_region *r, unsigned long size)
239 {
240 	int result;
241 	u64 muid;
242 
243 	r->size = _ALIGN_DOWN(size, 1 << PAGE_SHIFT_16M);
244 
245 	DBG("%s:%d requested  %lxh\n", __func__, __LINE__, size);
246 	DBG("%s:%d actual     %llxh\n", __func__, __LINE__, r->size);
247 	DBG("%s:%d difference %llxh (%lluMB)\n", __func__, __LINE__,
248 		size - r->size, (size - r->size) / 1024 / 1024);
249 
250 	if (r->size == 0) {
251 		DBG("%s:%d: size == 0\n", __func__, __LINE__);
252 		result = -1;
253 		goto zero_region;
254 	}
255 
256 	result = lv1_allocate_memory(r->size, PAGE_SHIFT_16M, 0,
257 		ALLOCATE_MEMORY_TRY_ALT_UNIT, &r->base, &muid);
258 
259 	if (result || r->base < map.rm.size) {
260 		DBG("%s:%d: lv1_allocate_memory failed: %s\n",
261 			__func__, __LINE__, ps3_result(result));
262 		goto zero_region;
263 	}
264 
265 	r->offset = r->base - map.rm.size;
266 	return result;
267 
268 zero_region:
269 	r->size = r->base = r->offset = 0;
270 	return result;
271 }
272 
273 /**
274  * ps3_mm_region_destroy - destroy a memory region
275  * @r: pointer to struct mem_region
276  */
277 
ps3_mm_region_destroy(struct mem_region * r)278 static void ps3_mm_region_destroy(struct mem_region *r)
279 {
280 	int result;
281 
282 	DBG("%s:%d: r->base = %llxh\n", __func__, __LINE__, r->base);
283 	if (r->base) {
284 		result = lv1_release_memory(r->base);
285 		BUG_ON(result);
286 		r->size = r->base = r->offset = 0;
287 		map.total = map.rm.size;
288 	}
289 }
290 
291 /**
292  * ps3_mm_add_memory - hot add memory
293  */
294 
ps3_mm_add_memory(void)295 static int __init ps3_mm_add_memory(void)
296 {
297 	int result;
298 	unsigned long start_addr;
299 	unsigned long start_pfn;
300 	unsigned long nr_pages;
301 
302 	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
303 		return -ENODEV;
304 
305 	BUG_ON(!mem_init_done);
306 
307 	start_addr = map.rm.size;
308 	start_pfn = start_addr >> PAGE_SHIFT;
309 	nr_pages = (map.r1.size + PAGE_SIZE - 1) >> PAGE_SHIFT;
310 
311 	DBG("%s:%d: start_addr %lxh, start_pfn %lxh, nr_pages %lxh\n",
312 		__func__, __LINE__, start_addr, start_pfn, nr_pages);
313 
314 	result = add_memory(0, start_addr, map.r1.size);
315 
316 	if (result) {
317 		pr_err("%s:%d: add_memory failed: (%d)\n",
318 			__func__, __LINE__, result);
319 		return result;
320 	}
321 
322 	memblock_add(start_addr, map.r1.size);
323 
324 	result = online_pages(start_pfn, nr_pages);
325 
326 	if (result)
327 		pr_err("%s:%d: online_pages failed: (%d)\n",
328 			__func__, __LINE__, result);
329 
330 	return result;
331 }
332 
333 device_initcall(ps3_mm_add_memory);
334 
335 /*============================================================================*/
336 /* dma routines                                                               */
337 /*============================================================================*/
338 
339 /**
340  * dma_sb_lpar_to_bus - Translate an lpar address to ioc mapped bus address.
341  * @r: pointer to dma region structure
342  * @lpar_addr: HV lpar address
343  */
344 
dma_sb_lpar_to_bus(struct ps3_dma_region * r,unsigned long lpar_addr)345 static unsigned long dma_sb_lpar_to_bus(struct ps3_dma_region *r,
346 	unsigned long lpar_addr)
347 {
348 	if (lpar_addr >= map.rm.size)
349 		lpar_addr -= map.r1.offset;
350 	BUG_ON(lpar_addr < r->offset);
351 	BUG_ON(lpar_addr >= r->offset + r->len);
352 	return r->bus_addr + lpar_addr - r->offset;
353 }
354 
355 #define dma_dump_region(_a) _dma_dump_region(_a, __func__, __LINE__)
_dma_dump_region(const struct ps3_dma_region * r,const char * func,int line)356 static void  __maybe_unused _dma_dump_region(const struct ps3_dma_region *r,
357 	const char *func, int line)
358 {
359 	DBG("%s:%d: dev        %llu:%llu\n", func, line, r->dev->bus_id,
360 		r->dev->dev_id);
361 	DBG("%s:%d: page_size  %u\n", func, line, r->page_size);
362 	DBG("%s:%d: bus_addr   %lxh\n", func, line, r->bus_addr);
363 	DBG("%s:%d: len        %lxh\n", func, line, r->len);
364 	DBG("%s:%d: offset     %lxh\n", func, line, r->offset);
365 }
366 
367   /**
368  * dma_chunk - A chunk of dma pages mapped by the io controller.
369  * @region - The dma region that owns this chunk.
370  * @lpar_addr: Starting lpar address of the area to map.
371  * @bus_addr: Starting ioc bus address of the area to map.
372  * @len: Length in bytes of the area to map.
373  * @link: A struct list_head used with struct ps3_dma_region.chunk_list, the
374  * list of all chuncks owned by the region.
375  *
376  * This implementation uses a very simple dma page manager
377  * based on the dma_chunk structure.  This scheme assumes
378  * that all drivers use very well behaved dma ops.
379  */
380 
381 struct dma_chunk {
382 	struct ps3_dma_region *region;
383 	unsigned long lpar_addr;
384 	unsigned long bus_addr;
385 	unsigned long len;
386 	struct list_head link;
387 	unsigned int usage_count;
388 };
389 
390 #define dma_dump_chunk(_a) _dma_dump_chunk(_a, __func__, __LINE__)
_dma_dump_chunk(const struct dma_chunk * c,const char * func,int line)391 static void _dma_dump_chunk (const struct dma_chunk* c, const char* func,
392 	int line)
393 {
394 	DBG("%s:%d: r.dev        %llu:%llu\n", func, line,
395 		c->region->dev->bus_id, c->region->dev->dev_id);
396 	DBG("%s:%d: r.bus_addr   %lxh\n", func, line, c->region->bus_addr);
397 	DBG("%s:%d: r.page_size  %u\n", func, line, c->region->page_size);
398 	DBG("%s:%d: r.len        %lxh\n", func, line, c->region->len);
399 	DBG("%s:%d: r.offset     %lxh\n", func, line, c->region->offset);
400 	DBG("%s:%d: c.lpar_addr  %lxh\n", func, line, c->lpar_addr);
401 	DBG("%s:%d: c.bus_addr   %lxh\n", func, line, c->bus_addr);
402 	DBG("%s:%d: c.len        %lxh\n", func, line, c->len);
403 }
404 
dma_find_chunk(struct ps3_dma_region * r,unsigned long bus_addr,unsigned long len)405 static struct dma_chunk * dma_find_chunk(struct ps3_dma_region *r,
406 	unsigned long bus_addr, unsigned long len)
407 {
408 	struct dma_chunk *c;
409 	unsigned long aligned_bus = _ALIGN_DOWN(bus_addr, 1 << r->page_size);
410 	unsigned long aligned_len = _ALIGN_UP(len+bus_addr-aligned_bus,
411 					      1 << r->page_size);
412 
413 	list_for_each_entry(c, &r->chunk_list.head, link) {
414 		/* intersection */
415 		if (aligned_bus >= c->bus_addr &&
416 		    aligned_bus + aligned_len <= c->bus_addr + c->len)
417 			return c;
418 
419 		/* below */
420 		if (aligned_bus + aligned_len <= c->bus_addr)
421 			continue;
422 
423 		/* above */
424 		if (aligned_bus >= c->bus_addr + c->len)
425 			continue;
426 
427 		/* we don't handle the multi-chunk case for now */
428 		dma_dump_chunk(c);
429 		BUG();
430 	}
431 	return NULL;
432 }
433 
dma_find_chunk_lpar(struct ps3_dma_region * r,unsigned long lpar_addr,unsigned long len)434 static struct dma_chunk *dma_find_chunk_lpar(struct ps3_dma_region *r,
435 	unsigned long lpar_addr, unsigned long len)
436 {
437 	struct dma_chunk *c;
438 	unsigned long aligned_lpar = _ALIGN_DOWN(lpar_addr, 1 << r->page_size);
439 	unsigned long aligned_len = _ALIGN_UP(len + lpar_addr - aligned_lpar,
440 					      1 << r->page_size);
441 
442 	list_for_each_entry(c, &r->chunk_list.head, link) {
443 		/* intersection */
444 		if (c->lpar_addr <= aligned_lpar &&
445 		    aligned_lpar < c->lpar_addr + c->len) {
446 			if (aligned_lpar + aligned_len <= c->lpar_addr + c->len)
447 				return c;
448 			else {
449 				dma_dump_chunk(c);
450 				BUG();
451 			}
452 		}
453 		/* below */
454 		if (aligned_lpar + aligned_len <= c->lpar_addr) {
455 			continue;
456 		}
457 		/* above */
458 		if (c->lpar_addr + c->len <= aligned_lpar) {
459 			continue;
460 		}
461 	}
462 	return NULL;
463 }
464 
dma_sb_free_chunk(struct dma_chunk * c)465 static int dma_sb_free_chunk(struct dma_chunk *c)
466 {
467 	int result = 0;
468 
469 	if (c->bus_addr) {
470 		result = lv1_unmap_device_dma_region(c->region->dev->bus_id,
471 			c->region->dev->dev_id, c->bus_addr, c->len);
472 		BUG_ON(result);
473 	}
474 
475 	kfree(c);
476 	return result;
477 }
478 
dma_ioc0_free_chunk(struct dma_chunk * c)479 static int dma_ioc0_free_chunk(struct dma_chunk *c)
480 {
481 	int result = 0;
482 	int iopage;
483 	unsigned long offset;
484 	struct ps3_dma_region *r = c->region;
485 
486 	DBG("%s:start\n", __func__);
487 	for (iopage = 0; iopage < (c->len >> r->page_size); iopage++) {
488 		offset = (1 << r->page_size) * iopage;
489 		/* put INVALID entry */
490 		result = lv1_put_iopte(0,
491 				       c->bus_addr + offset,
492 				       c->lpar_addr + offset,
493 				       r->ioid,
494 				       0);
495 		DBG("%s: bus=%#lx, lpar=%#lx, ioid=%d\n", __func__,
496 		    c->bus_addr + offset,
497 		    c->lpar_addr + offset,
498 		    r->ioid);
499 
500 		if (result) {
501 			DBG("%s:%d: lv1_put_iopte failed: %s\n", __func__,
502 			    __LINE__, ps3_result(result));
503 		}
504 	}
505 	kfree(c);
506 	DBG("%s:end\n", __func__);
507 	return result;
508 }
509 
510 /**
511  * dma_sb_map_pages - Maps dma pages into the io controller bus address space.
512  * @r: Pointer to a struct ps3_dma_region.
513  * @phys_addr: Starting physical address of the area to map.
514  * @len: Length in bytes of the area to map.
515  * c_out: A pointer to receive an allocated struct dma_chunk for this area.
516  *
517  * This is the lowest level dma mapping routine, and is the one that will
518  * make the HV call to add the pages into the io controller address space.
519  */
520 
dma_sb_map_pages(struct ps3_dma_region * r,unsigned long phys_addr,unsigned long len,struct dma_chunk ** c_out,u64 iopte_flag)521 static int dma_sb_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
522 	    unsigned long len, struct dma_chunk **c_out, u64 iopte_flag)
523 {
524 	int result;
525 	struct dma_chunk *c;
526 
527 	c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
528 
529 	if (!c) {
530 		result = -ENOMEM;
531 		goto fail_alloc;
532 	}
533 
534 	c->region = r;
535 	c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
536 	c->bus_addr = dma_sb_lpar_to_bus(r, c->lpar_addr);
537 	c->len = len;
538 
539 	BUG_ON(iopte_flag != 0xf800000000000000UL);
540 	result = lv1_map_device_dma_region(c->region->dev->bus_id,
541 					   c->region->dev->dev_id, c->lpar_addr,
542 					   c->bus_addr, c->len, iopte_flag);
543 	if (result) {
544 		DBG("%s:%d: lv1_map_device_dma_region failed: %s\n",
545 			__func__, __LINE__, ps3_result(result));
546 		goto fail_map;
547 	}
548 
549 	list_add(&c->link, &r->chunk_list.head);
550 
551 	*c_out = c;
552 	return 0;
553 
554 fail_map:
555 	kfree(c);
556 fail_alloc:
557 	*c_out = NULL;
558 	DBG(" <- %s:%d\n", __func__, __LINE__);
559 	return result;
560 }
561 
dma_ioc0_map_pages(struct ps3_dma_region * r,unsigned long phys_addr,unsigned long len,struct dma_chunk ** c_out,u64 iopte_flag)562 static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr,
563 			      unsigned long len, struct dma_chunk **c_out,
564 			      u64 iopte_flag)
565 {
566 	int result;
567 	struct dma_chunk *c, *last;
568 	int iopage, pages;
569 	unsigned long offset;
570 
571 	DBG(KERN_ERR "%s: phy=%#lx, lpar%#lx, len=%#lx\n", __func__,
572 	    phys_addr, ps3_mm_phys_to_lpar(phys_addr), len);
573 	c = kzalloc(sizeof(struct dma_chunk), GFP_ATOMIC);
574 
575 	if (!c) {
576 		result = -ENOMEM;
577 		goto fail_alloc;
578 	}
579 
580 	c->region = r;
581 	c->len = len;
582 	c->lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
583 	/* allocate IO address */
584 	if (list_empty(&r->chunk_list.head)) {
585 		/* first one */
586 		c->bus_addr = r->bus_addr;
587 	} else {
588 		/* derive from last bus addr*/
589 		last  = list_entry(r->chunk_list.head.next,
590 				   struct dma_chunk, link);
591 		c->bus_addr = last->bus_addr + last->len;
592 		DBG("%s: last bus=%#lx, len=%#lx\n", __func__,
593 		    last->bus_addr, last->len);
594 	}
595 
596 	/* FIXME: check whether length exceeds region size */
597 
598 	/* build ioptes for the area */
599 	pages = len >> r->page_size;
600 	DBG("%s: pgsize=%#x len=%#lx pages=%#x iopteflag=%#llx\n", __func__,
601 	    r->page_size, r->len, pages, iopte_flag);
602 	for (iopage = 0; iopage < pages; iopage++) {
603 		offset = (1 << r->page_size) * iopage;
604 		result = lv1_put_iopte(0,
605 				       c->bus_addr + offset,
606 				       c->lpar_addr + offset,
607 				       r->ioid,
608 				       iopte_flag);
609 		if (result) {
610 			pr_warning("%s:%d: lv1_put_iopte failed: %s\n",
611 				   __func__, __LINE__, ps3_result(result));
612 			goto fail_map;
613 		}
614 		DBG("%s: pg=%d bus=%#lx, lpar=%#lx, ioid=%#x\n", __func__,
615 		    iopage, c->bus_addr + offset, c->lpar_addr + offset,
616 		    r->ioid);
617 	}
618 
619 	/* be sure that last allocated one is inserted at head */
620 	list_add(&c->link, &r->chunk_list.head);
621 
622 	*c_out = c;
623 	DBG("%s: end\n", __func__);
624 	return 0;
625 
626 fail_map:
627 	for (iopage--; 0 <= iopage; iopage--) {
628 		lv1_put_iopte(0,
629 			      c->bus_addr + offset,
630 			      c->lpar_addr + offset,
631 			      r->ioid,
632 			      0);
633 	}
634 	kfree(c);
635 fail_alloc:
636 	*c_out = NULL;
637 	return result;
638 }
639 
640 /**
641  * dma_sb_region_create - Create a device dma region.
642  * @r: Pointer to a struct ps3_dma_region.
643  *
644  * This is the lowest level dma region create routine, and is the one that
645  * will make the HV call to create the region.
646  */
647 
dma_sb_region_create(struct ps3_dma_region * r)648 static int dma_sb_region_create(struct ps3_dma_region *r)
649 {
650 	int result;
651 	u64 bus_addr;
652 
653 	DBG(" -> %s:%d:\n", __func__, __LINE__);
654 
655 	BUG_ON(!r);
656 
657 	if (!r->dev->bus_id) {
658 		pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
659 			r->dev->bus_id, r->dev->dev_id);
660 		return 0;
661 	}
662 
663 	DBG("%s:%u: len = 0x%lx, page_size = %u, offset = 0x%lx\n", __func__,
664 	    __LINE__, r->len, r->page_size, r->offset);
665 
666 	BUG_ON(!r->len);
667 	BUG_ON(!r->page_size);
668 	BUG_ON(!r->region_ops);
669 
670 	INIT_LIST_HEAD(&r->chunk_list.head);
671 	spin_lock_init(&r->chunk_list.lock);
672 
673 	result = lv1_allocate_device_dma_region(r->dev->bus_id, r->dev->dev_id,
674 		roundup_pow_of_two(r->len), r->page_size, r->region_type,
675 		&bus_addr);
676 	r->bus_addr = bus_addr;
677 
678 	if (result) {
679 		DBG("%s:%d: lv1_allocate_device_dma_region failed: %s\n",
680 			__func__, __LINE__, ps3_result(result));
681 		r->len = r->bus_addr = 0;
682 	}
683 
684 	return result;
685 }
686 
dma_ioc0_region_create(struct ps3_dma_region * r)687 static int dma_ioc0_region_create(struct ps3_dma_region *r)
688 {
689 	int result;
690 	u64 bus_addr;
691 
692 	INIT_LIST_HEAD(&r->chunk_list.head);
693 	spin_lock_init(&r->chunk_list.lock);
694 
695 	result = lv1_allocate_io_segment(0,
696 					 r->len,
697 					 r->page_size,
698 					 &bus_addr);
699 	r->bus_addr = bus_addr;
700 	if (result) {
701 		DBG("%s:%d: lv1_allocate_io_segment failed: %s\n",
702 			__func__, __LINE__, ps3_result(result));
703 		r->len = r->bus_addr = 0;
704 	}
705 	DBG("%s: len=%#lx, pg=%d, bus=%#lx\n", __func__,
706 	    r->len, r->page_size, r->bus_addr);
707 	return result;
708 }
709 
710 /**
711  * dma_region_free - Free a device dma region.
712  * @r: Pointer to a struct ps3_dma_region.
713  *
714  * This is the lowest level dma region free routine, and is the one that
715  * will make the HV call to free the region.
716  */
717 
dma_sb_region_free(struct ps3_dma_region * r)718 static int dma_sb_region_free(struct ps3_dma_region *r)
719 {
720 	int result;
721 	struct dma_chunk *c;
722 	struct dma_chunk *tmp;
723 
724 	BUG_ON(!r);
725 
726 	if (!r->dev->bus_id) {
727 		pr_info("%s:%d: %llu:%llu no dma\n", __func__, __LINE__,
728 			r->dev->bus_id, r->dev->dev_id);
729 		return 0;
730 	}
731 
732 	list_for_each_entry_safe(c, tmp, &r->chunk_list.head, link) {
733 		list_del(&c->link);
734 		dma_sb_free_chunk(c);
735 	}
736 
737 	result = lv1_free_device_dma_region(r->dev->bus_id, r->dev->dev_id,
738 		r->bus_addr);
739 
740 	if (result)
741 		DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
742 			__func__, __LINE__, ps3_result(result));
743 
744 	r->bus_addr = 0;
745 
746 	return result;
747 }
748 
dma_ioc0_region_free(struct ps3_dma_region * r)749 static int dma_ioc0_region_free(struct ps3_dma_region *r)
750 {
751 	int result;
752 	struct dma_chunk *c, *n;
753 
754 	DBG("%s: start\n", __func__);
755 	list_for_each_entry_safe(c, n, &r->chunk_list.head, link) {
756 		list_del(&c->link);
757 		dma_ioc0_free_chunk(c);
758 	}
759 
760 	result = lv1_release_io_segment(0, r->bus_addr);
761 
762 	if (result)
763 		DBG("%s:%d: lv1_free_device_dma_region failed: %s\n",
764 			__func__, __LINE__, ps3_result(result));
765 
766 	r->bus_addr = 0;
767 	DBG("%s: end\n", __func__);
768 
769 	return result;
770 }
771 
772 /**
773  * dma_sb_map_area - Map an area of memory into a device dma region.
774  * @r: Pointer to a struct ps3_dma_region.
775  * @virt_addr: Starting virtual address of the area to map.
776  * @len: Length in bytes of the area to map.
777  * @bus_addr: A pointer to return the starting ioc bus address of the area to
778  * map.
779  *
780  * This is the common dma mapping routine.
781  */
782 
dma_sb_map_area(struct ps3_dma_region * r,unsigned long virt_addr,unsigned long len,dma_addr_t * bus_addr,u64 iopte_flag)783 static int dma_sb_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
784 	   unsigned long len, dma_addr_t *bus_addr,
785 	   u64 iopte_flag)
786 {
787 	int result;
788 	unsigned long flags;
789 	struct dma_chunk *c;
790 	unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
791 		: virt_addr;
792 	unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
793 	unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
794 					      1 << r->page_size);
795 	*bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
796 
797 	if (!USE_DYNAMIC_DMA) {
798 		unsigned long lpar_addr = ps3_mm_phys_to_lpar(phys_addr);
799 		DBG(" -> %s:%d\n", __func__, __LINE__);
800 		DBG("%s:%d virt_addr %lxh\n", __func__, __LINE__,
801 			virt_addr);
802 		DBG("%s:%d phys_addr %lxh\n", __func__, __LINE__,
803 			phys_addr);
804 		DBG("%s:%d lpar_addr %lxh\n", __func__, __LINE__,
805 			lpar_addr);
806 		DBG("%s:%d len       %lxh\n", __func__, __LINE__, len);
807 		DBG("%s:%d bus_addr  %llxh (%lxh)\n", __func__, __LINE__,
808 		*bus_addr, len);
809 	}
810 
811 	spin_lock_irqsave(&r->chunk_list.lock, flags);
812 	c = dma_find_chunk(r, *bus_addr, len);
813 
814 	if (c) {
815 		DBG("%s:%d: reusing mapped chunk", __func__, __LINE__);
816 		dma_dump_chunk(c);
817 		c->usage_count++;
818 		spin_unlock_irqrestore(&r->chunk_list.lock, flags);
819 		return 0;
820 	}
821 
822 	result = dma_sb_map_pages(r, aligned_phys, aligned_len, &c, iopte_flag);
823 
824 	if (result) {
825 		*bus_addr = 0;
826 		DBG("%s:%d: dma_sb_map_pages failed (%d)\n",
827 			__func__, __LINE__, result);
828 		spin_unlock_irqrestore(&r->chunk_list.lock, flags);
829 		return result;
830 	}
831 
832 	c->usage_count = 1;
833 
834 	spin_unlock_irqrestore(&r->chunk_list.lock, flags);
835 	return result;
836 }
837 
dma_ioc0_map_area(struct ps3_dma_region * r,unsigned long virt_addr,unsigned long len,dma_addr_t * bus_addr,u64 iopte_flag)838 static int dma_ioc0_map_area(struct ps3_dma_region *r, unsigned long virt_addr,
839 	     unsigned long len, dma_addr_t *bus_addr,
840 	     u64 iopte_flag)
841 {
842 	int result;
843 	unsigned long flags;
844 	struct dma_chunk *c;
845 	unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
846 		: virt_addr;
847 	unsigned long aligned_phys = _ALIGN_DOWN(phys_addr, 1 << r->page_size);
848 	unsigned long aligned_len = _ALIGN_UP(len + phys_addr - aligned_phys,
849 					      1 << r->page_size);
850 
851 	DBG(KERN_ERR "%s: vaddr=%#lx, len=%#lx\n", __func__,
852 	    virt_addr, len);
853 	DBG(KERN_ERR "%s: ph=%#lx a_ph=%#lx a_l=%#lx\n", __func__,
854 	    phys_addr, aligned_phys, aligned_len);
855 
856 	spin_lock_irqsave(&r->chunk_list.lock, flags);
857 	c = dma_find_chunk_lpar(r, ps3_mm_phys_to_lpar(phys_addr), len);
858 
859 	if (c) {
860 		/* FIXME */
861 		BUG();
862 		*bus_addr = c->bus_addr + phys_addr - aligned_phys;
863 		c->usage_count++;
864 		spin_unlock_irqrestore(&r->chunk_list.lock, flags);
865 		return 0;
866 	}
867 
868 	result = dma_ioc0_map_pages(r, aligned_phys, aligned_len, &c,
869 				    iopte_flag);
870 
871 	if (result) {
872 		*bus_addr = 0;
873 		DBG("%s:%d: dma_ioc0_map_pages failed (%d)\n",
874 			__func__, __LINE__, result);
875 		spin_unlock_irqrestore(&r->chunk_list.lock, flags);
876 		return result;
877 	}
878 	*bus_addr = c->bus_addr + phys_addr - aligned_phys;
879 	DBG("%s: va=%#lx pa=%#lx a_pa=%#lx bus=%#llx\n", __func__,
880 	    virt_addr, phys_addr, aligned_phys, *bus_addr);
881 	c->usage_count = 1;
882 
883 	spin_unlock_irqrestore(&r->chunk_list.lock, flags);
884 	return result;
885 }
886 
887 /**
888  * dma_sb_unmap_area - Unmap an area of memory from a device dma region.
889  * @r: Pointer to a struct ps3_dma_region.
890  * @bus_addr: The starting ioc bus address of the area to unmap.
891  * @len: Length in bytes of the area to unmap.
892  *
893  * This is the common dma unmap routine.
894  */
895 
dma_sb_unmap_area(struct ps3_dma_region * r,dma_addr_t bus_addr,unsigned long len)896 static int dma_sb_unmap_area(struct ps3_dma_region *r, dma_addr_t bus_addr,
897 	unsigned long len)
898 {
899 	unsigned long flags;
900 	struct dma_chunk *c;
901 
902 	spin_lock_irqsave(&r->chunk_list.lock, flags);
903 	c = dma_find_chunk(r, bus_addr, len);
904 
905 	if (!c) {
906 		unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
907 			1 << r->page_size);
908 		unsigned long aligned_len = _ALIGN_UP(len + bus_addr
909 			- aligned_bus, 1 << r->page_size);
910 		DBG("%s:%d: not found: bus_addr %llxh\n",
911 			__func__, __LINE__, bus_addr);
912 		DBG("%s:%d: not found: len %lxh\n",
913 			__func__, __LINE__, len);
914 		DBG("%s:%d: not found: aligned_bus %lxh\n",
915 			__func__, __LINE__, aligned_bus);
916 		DBG("%s:%d: not found: aligned_len %lxh\n",
917 			__func__, __LINE__, aligned_len);
918 		BUG();
919 	}
920 
921 	c->usage_count--;
922 
923 	if (!c->usage_count) {
924 		list_del(&c->link);
925 		dma_sb_free_chunk(c);
926 	}
927 
928 	spin_unlock_irqrestore(&r->chunk_list.lock, flags);
929 	return 0;
930 }
931 
dma_ioc0_unmap_area(struct ps3_dma_region * r,dma_addr_t bus_addr,unsigned long len)932 static int dma_ioc0_unmap_area(struct ps3_dma_region *r,
933 			dma_addr_t bus_addr, unsigned long len)
934 {
935 	unsigned long flags;
936 	struct dma_chunk *c;
937 
938 	DBG("%s: start a=%#llx l=%#lx\n", __func__, bus_addr, len);
939 	spin_lock_irqsave(&r->chunk_list.lock, flags);
940 	c = dma_find_chunk(r, bus_addr, len);
941 
942 	if (!c) {
943 		unsigned long aligned_bus = _ALIGN_DOWN(bus_addr,
944 							1 << r->page_size);
945 		unsigned long aligned_len = _ALIGN_UP(len + bus_addr
946 						      - aligned_bus,
947 						      1 << r->page_size);
948 		DBG("%s:%d: not found: bus_addr %llxh\n",
949 		    __func__, __LINE__, bus_addr);
950 		DBG("%s:%d: not found: len %lxh\n",
951 		    __func__, __LINE__, len);
952 		DBG("%s:%d: not found: aligned_bus %lxh\n",
953 		    __func__, __LINE__, aligned_bus);
954 		DBG("%s:%d: not found: aligned_len %lxh\n",
955 		    __func__, __LINE__, aligned_len);
956 		BUG();
957 	}
958 
959 	c->usage_count--;
960 
961 	if (!c->usage_count) {
962 		list_del(&c->link);
963 		dma_ioc0_free_chunk(c);
964 	}
965 
966 	spin_unlock_irqrestore(&r->chunk_list.lock, flags);
967 	DBG("%s: end\n", __func__);
968 	return 0;
969 }
970 
971 /**
972  * dma_sb_region_create_linear - Setup a linear dma mapping for a device.
973  * @r: Pointer to a struct ps3_dma_region.
974  *
975  * This routine creates an HV dma region for the device and maps all available
976  * ram into the io controller bus address space.
977  */
978 
dma_sb_region_create_linear(struct ps3_dma_region * r)979 static int dma_sb_region_create_linear(struct ps3_dma_region *r)
980 {
981 	int result;
982 	unsigned long virt_addr, len;
983 	dma_addr_t tmp;
984 
985 	if (r->len > 16*1024*1024) {	/* FIXME: need proper fix */
986 		/* force 16M dma pages for linear mapping */
987 		if (r->page_size != PS3_DMA_16M) {
988 			pr_info("%s:%d: forcing 16M pages for linear map\n",
989 				__func__, __LINE__);
990 			r->page_size = PS3_DMA_16M;
991 			r->len = _ALIGN_UP(r->len, 1 << r->page_size);
992 		}
993 	}
994 
995 	result = dma_sb_region_create(r);
996 	BUG_ON(result);
997 
998 	if (r->offset < map.rm.size) {
999 		/* Map (part of) 1st RAM chunk */
1000 		virt_addr = map.rm.base + r->offset;
1001 		len = map.rm.size - r->offset;
1002 		if (len > r->len)
1003 			len = r->len;
1004 		result = dma_sb_map_area(r, virt_addr, len, &tmp,
1005 			CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
1006 			CBE_IOPTE_M);
1007 		BUG_ON(result);
1008 	}
1009 
1010 	if (r->offset + r->len > map.rm.size) {
1011 		/* Map (part of) 2nd RAM chunk */
1012 		virt_addr = map.rm.size;
1013 		len = r->len;
1014 		if (r->offset >= map.rm.size)
1015 			virt_addr += r->offset - map.rm.size;
1016 		else
1017 			len -= map.rm.size - r->offset;
1018 		result = dma_sb_map_area(r, virt_addr, len, &tmp,
1019 			CBE_IOPTE_PP_W | CBE_IOPTE_PP_R | CBE_IOPTE_SO_RW |
1020 			CBE_IOPTE_M);
1021 		BUG_ON(result);
1022 	}
1023 
1024 	return result;
1025 }
1026 
1027 /**
1028  * dma_sb_region_free_linear - Free a linear dma mapping for a device.
1029  * @r: Pointer to a struct ps3_dma_region.
1030  *
1031  * This routine will unmap all mapped areas and free the HV dma region.
1032  */
1033 
dma_sb_region_free_linear(struct ps3_dma_region * r)1034 static int dma_sb_region_free_linear(struct ps3_dma_region *r)
1035 {
1036 	int result;
1037 	dma_addr_t bus_addr;
1038 	unsigned long len, lpar_addr;
1039 
1040 	if (r->offset < map.rm.size) {
1041 		/* Unmap (part of) 1st RAM chunk */
1042 		lpar_addr = map.rm.base + r->offset;
1043 		len = map.rm.size - r->offset;
1044 		if (len > r->len)
1045 			len = r->len;
1046 		bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1047 		result = dma_sb_unmap_area(r, bus_addr, len);
1048 		BUG_ON(result);
1049 	}
1050 
1051 	if (r->offset + r->len > map.rm.size) {
1052 		/* Unmap (part of) 2nd RAM chunk */
1053 		lpar_addr = map.r1.base;
1054 		len = r->len;
1055 		if (r->offset >= map.rm.size)
1056 			lpar_addr += r->offset - map.rm.size;
1057 		else
1058 			len -= map.rm.size - r->offset;
1059 		bus_addr = dma_sb_lpar_to_bus(r, lpar_addr);
1060 		result = dma_sb_unmap_area(r, bus_addr, len);
1061 		BUG_ON(result);
1062 	}
1063 
1064 	result = dma_sb_region_free(r);
1065 	BUG_ON(result);
1066 
1067 	return result;
1068 }
1069 
1070 /**
1071  * dma_sb_map_area_linear - Map an area of memory into a device dma region.
1072  * @r: Pointer to a struct ps3_dma_region.
1073  * @virt_addr: Starting virtual address of the area to map.
1074  * @len: Length in bytes of the area to map.
1075  * @bus_addr: A pointer to return the starting ioc bus address of the area to
1076  * map.
1077  *
1078  * This routine just returns the corresponding bus address.  Actual mapping
1079  * occurs in dma_region_create_linear().
1080  */
1081 
dma_sb_map_area_linear(struct ps3_dma_region * r,unsigned long virt_addr,unsigned long len,dma_addr_t * bus_addr,u64 iopte_flag)1082 static int dma_sb_map_area_linear(struct ps3_dma_region *r,
1083 	unsigned long virt_addr, unsigned long len, dma_addr_t *bus_addr,
1084 	u64 iopte_flag)
1085 {
1086 	unsigned long phys_addr = is_kernel_addr(virt_addr) ? __pa(virt_addr)
1087 		: virt_addr;
1088 	*bus_addr = dma_sb_lpar_to_bus(r, ps3_mm_phys_to_lpar(phys_addr));
1089 	return 0;
1090 }
1091 
1092 /**
1093  * dma_unmap_area_linear - Unmap an area of memory from a device dma region.
1094  * @r: Pointer to a struct ps3_dma_region.
1095  * @bus_addr: The starting ioc bus address of the area to unmap.
1096  * @len: Length in bytes of the area to unmap.
1097  *
1098  * This routine does nothing.  Unmapping occurs in dma_sb_region_free_linear().
1099  */
1100 
dma_sb_unmap_area_linear(struct ps3_dma_region * r,dma_addr_t bus_addr,unsigned long len)1101 static int dma_sb_unmap_area_linear(struct ps3_dma_region *r,
1102 	dma_addr_t bus_addr, unsigned long len)
1103 {
1104 	return 0;
1105 };
1106 
1107 static const struct ps3_dma_region_ops ps3_dma_sb_region_ops =  {
1108 	.create = dma_sb_region_create,
1109 	.free = dma_sb_region_free,
1110 	.map = dma_sb_map_area,
1111 	.unmap = dma_sb_unmap_area
1112 };
1113 
1114 static const struct ps3_dma_region_ops ps3_dma_sb_region_linear_ops = {
1115 	.create = dma_sb_region_create_linear,
1116 	.free = dma_sb_region_free_linear,
1117 	.map = dma_sb_map_area_linear,
1118 	.unmap = dma_sb_unmap_area_linear
1119 };
1120 
1121 static const struct ps3_dma_region_ops ps3_dma_ioc0_region_ops = {
1122 	.create = dma_ioc0_region_create,
1123 	.free = dma_ioc0_region_free,
1124 	.map = dma_ioc0_map_area,
1125 	.unmap = dma_ioc0_unmap_area
1126 };
1127 
ps3_dma_region_init(struct ps3_system_bus_device * dev,struct ps3_dma_region * r,enum ps3_dma_page_size page_size,enum ps3_dma_region_type region_type,void * addr,unsigned long len)1128 int ps3_dma_region_init(struct ps3_system_bus_device *dev,
1129 	struct ps3_dma_region *r, enum ps3_dma_page_size page_size,
1130 	enum ps3_dma_region_type region_type, void *addr, unsigned long len)
1131 {
1132 	unsigned long lpar_addr;
1133 
1134 	lpar_addr = addr ? ps3_mm_phys_to_lpar(__pa(addr)) : 0;
1135 
1136 	r->dev = dev;
1137 	r->page_size = page_size;
1138 	r->region_type = region_type;
1139 	r->offset = lpar_addr;
1140 	if (r->offset >= map.rm.size)
1141 		r->offset -= map.r1.offset;
1142 	r->len = len ? len : _ALIGN_UP(map.total, 1 << r->page_size);
1143 
1144 	switch (dev->dev_type) {
1145 	case PS3_DEVICE_TYPE_SB:
1146 		r->region_ops =  (USE_DYNAMIC_DMA)
1147 			? &ps3_dma_sb_region_ops
1148 			: &ps3_dma_sb_region_linear_ops;
1149 		break;
1150 	case PS3_DEVICE_TYPE_IOC0:
1151 		r->region_ops = &ps3_dma_ioc0_region_ops;
1152 		break;
1153 	default:
1154 		BUG();
1155 		return -EINVAL;
1156 	}
1157 	return 0;
1158 }
1159 EXPORT_SYMBOL(ps3_dma_region_init);
1160 
ps3_dma_region_create(struct ps3_dma_region * r)1161 int ps3_dma_region_create(struct ps3_dma_region *r)
1162 {
1163 	BUG_ON(!r);
1164 	BUG_ON(!r->region_ops);
1165 	BUG_ON(!r->region_ops->create);
1166 	return r->region_ops->create(r);
1167 }
1168 EXPORT_SYMBOL(ps3_dma_region_create);
1169 
ps3_dma_region_free(struct ps3_dma_region * r)1170 int ps3_dma_region_free(struct ps3_dma_region *r)
1171 {
1172 	BUG_ON(!r);
1173 	BUG_ON(!r->region_ops);
1174 	BUG_ON(!r->region_ops->free);
1175 	return r->region_ops->free(r);
1176 }
1177 EXPORT_SYMBOL(ps3_dma_region_free);
1178 
ps3_dma_map(struct ps3_dma_region * r,unsigned long virt_addr,unsigned long len,dma_addr_t * bus_addr,u64 iopte_flag)1179 int ps3_dma_map(struct ps3_dma_region *r, unsigned long virt_addr,
1180 	unsigned long len, dma_addr_t *bus_addr,
1181 	u64 iopte_flag)
1182 {
1183 	return r->region_ops->map(r, virt_addr, len, bus_addr, iopte_flag);
1184 }
1185 
ps3_dma_unmap(struct ps3_dma_region * r,dma_addr_t bus_addr,unsigned long len)1186 int ps3_dma_unmap(struct ps3_dma_region *r, dma_addr_t bus_addr,
1187 	unsigned long len)
1188 {
1189 	return r->region_ops->unmap(r, bus_addr, len);
1190 }
1191 
1192 /*============================================================================*/
1193 /* system startup routines                                                    */
1194 /*============================================================================*/
1195 
1196 /**
1197  * ps3_mm_init - initialize the address space state variables
1198  */
1199 
ps3_mm_init(void)1200 void __init ps3_mm_init(void)
1201 {
1202 	int result;
1203 
1204 	DBG(" -> %s:%d\n", __func__, __LINE__);
1205 
1206 	result = ps3_repository_read_mm_info(&map.rm.base, &map.rm.size,
1207 		&map.total);
1208 
1209 	if (result)
1210 		panic("ps3_repository_read_mm_info() failed");
1211 
1212 	map.rm.offset = map.rm.base;
1213 	map.vas_id = map.htab_size = 0;
1214 
1215 	/* this implementation assumes map.rm.base is zero */
1216 
1217 	BUG_ON(map.rm.base);
1218 	BUG_ON(!map.rm.size);
1219 
1220 
1221 	/* arrange to do this in ps3_mm_add_memory */
1222 	ps3_mm_region_create(&map.r1, map.total - map.rm.size);
1223 
1224 	/* correct map.total for the real total amount of memory we use */
1225 	map.total = map.rm.size + map.r1.size;
1226 
1227 	DBG(" <- %s:%d\n", __func__, __LINE__);
1228 }
1229 
1230 /**
1231  * ps3_mm_shutdown - final cleanup of address space
1232  */
1233 
ps3_mm_shutdown(void)1234 void ps3_mm_shutdown(void)
1235 {
1236 	ps3_mm_region_destroy(&map.r1);
1237 }
1238