Commit | Line | Data |
---|---|---|
8f6a93a1 DM |
1 | /* pci_sun4v.c: SUN4V specific PCI controller support. |
2 | * | |
9fd8b647 | 3 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
8f6a93a1 DM |
4 | */ |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/types.h> | |
8 | #include <linux/pci.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/interrupt.h> | |
18397944 | 12 | #include <linux/percpu.h> |
35a17eb6 DM |
13 | #include <linux/irq.h> |
14 | #include <linux/msi.h> | |
59db8102 | 15 | #include <linux/log2.h> |
8f6a93a1 | 16 | |
8f6a93a1 DM |
17 | #include <asm/iommu.h> |
18 | #include <asm/irq.h> | |
19 | #include <asm/upa.h> | |
20 | #include <asm/pstate.h> | |
21 | #include <asm/oplib.h> | |
22 | #include <asm/hypervisor.h> | |
e87dc350 | 23 | #include <asm/prom.h> |
8f6a93a1 DM |
24 | |
25 | #include "pci_impl.h" | |
26 | #include "iommu_common.h" | |
27 | ||
bade5622 DM |
28 | #include "pci_sun4v.h" |
29 | ||
e01c0d6d DM |
30 | static unsigned long vpci_major = 1; |
31 | static unsigned long vpci_minor = 1; | |
32 | ||
7c8f486a | 33 | #define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) |
18397944 | 34 | |
16ce82d8 | 35 | struct iommu_batch { |
ad7ad57c | 36 | struct device *dev; /* Device mapping is for. */ |
6a32fd4d DM |
37 | unsigned long prot; /* IOMMU page protections */ |
38 | unsigned long entry; /* Index into IOTSB. */ | |
39 | u64 *pglist; /* List of physical pages */ | |
40 | unsigned long npages; /* Number of pages in list. */ | |
18397944 DM |
41 | }; |
42 | ||
ad7ad57c | 43 | static DEFINE_PER_CPU(struct iommu_batch, iommu_batch); |
6a32fd4d DM |
44 | |
45 | /* Interrupts must be disabled. */ | |
ad7ad57c | 46 | static inline void iommu_batch_start(struct device *dev, unsigned long prot, unsigned long entry) |
6a32fd4d | 47 | { |
ad7ad57c | 48 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d | 49 | |
ad7ad57c | 50 | p->dev = dev; |
6a32fd4d DM |
51 | p->prot = prot; |
52 | p->entry = entry; | |
53 | p->npages = 0; | |
54 | } | |
55 | ||
56 | /* Interrupts must be disabled. */ | |
ad7ad57c | 57 | static long iommu_batch_flush(struct iommu_batch *p) |
6a32fd4d | 58 | { |
ad7ad57c | 59 | struct pci_pbm_info *pbm = p->dev->archdata.host_controller; |
a2fb23af | 60 | unsigned long devhandle = pbm->devhandle; |
6a32fd4d DM |
61 | unsigned long prot = p->prot; |
62 | unsigned long entry = p->entry; | |
63 | u64 *pglist = p->pglist; | |
64 | unsigned long npages = p->npages; | |
65 | ||
d82965c1 | 66 | while (npages != 0) { |
6a32fd4d DM |
67 | long num; |
68 | ||
69 | num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry), | |
70 | npages, prot, __pa(pglist)); | |
71 | if (unlikely(num < 0)) { | |
72 | if (printk_ratelimit()) | |
ad7ad57c | 73 | printk("iommu_batch_flush: IOMMU map of " |
6a32fd4d DM |
74 | "[%08lx:%08lx:%lx:%lx:%lx] failed with " |
75 | "status %ld\n", | |
76 | devhandle, HV_PCI_TSBID(0, entry), | |
77 | npages, prot, __pa(pglist), num); | |
78 | return -1; | |
79 | } | |
80 | ||
81 | entry += num; | |
82 | npages -= num; | |
83 | pglist += num; | |
d82965c1 | 84 | } |
6a32fd4d DM |
85 | |
86 | p->entry = entry; | |
87 | p->npages = 0; | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | /* Interrupts must be disabled. */ | |
ad7ad57c | 93 | static inline long iommu_batch_add(u64 phys_page) |
6a32fd4d | 94 | { |
ad7ad57c | 95 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d DM |
96 | |
97 | BUG_ON(p->npages >= PGLIST_NENTS); | |
98 | ||
99 | p->pglist[p->npages++] = phys_page; | |
100 | if (p->npages == PGLIST_NENTS) | |
ad7ad57c | 101 | return iommu_batch_flush(p); |
6a32fd4d DM |
102 | |
103 | return 0; | |
104 | } | |
105 | ||
106 | /* Interrupts must be disabled. */ | |
ad7ad57c | 107 | static inline long iommu_batch_end(void) |
6a32fd4d | 108 | { |
ad7ad57c | 109 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d DM |
110 | |
111 | BUG_ON(p->npages >= PGLIST_NENTS); | |
112 | ||
ad7ad57c | 113 | return iommu_batch_flush(p); |
6a32fd4d | 114 | } |
18397944 | 115 | |
ad7ad57c | 116 | static long arena_alloc(struct iommu_arena *arena, unsigned long npages) |
18397944 DM |
117 | { |
118 | unsigned long n, i, start, end, limit; | |
119 | int pass; | |
120 | ||
121 | limit = arena->limit; | |
122 | start = arena->hint; | |
123 | pass = 0; | |
124 | ||
125 | again: | |
126 | n = find_next_zero_bit(arena->map, limit, start); | |
127 | end = n + npages; | |
128 | if (unlikely(end >= limit)) { | |
129 | if (likely(pass < 1)) { | |
130 | limit = start; | |
131 | start = 0; | |
132 | pass++; | |
133 | goto again; | |
134 | } else { | |
135 | /* Scanned the whole thing, give up. */ | |
136 | return -1; | |
137 | } | |
138 | } | |
139 | ||
140 | for (i = n; i < end; i++) { | |
141 | if (test_bit(i, arena->map)) { | |
142 | start = i + 1; | |
143 | goto again; | |
144 | } | |
145 | } | |
146 | ||
147 | for (i = n; i < end; i++) | |
148 | __set_bit(i, arena->map); | |
149 | ||
150 | arena->hint = end; | |
151 | ||
152 | return n; | |
153 | } | |
154 | ||
ad7ad57c DM |
155 | static void arena_free(struct iommu_arena *arena, unsigned long base, |
156 | unsigned long npages) | |
18397944 DM |
157 | { |
158 | unsigned long i; | |
159 | ||
160 | for (i = base; i < (base + npages); i++) | |
161 | __clear_bit(i, arena->map); | |
162 | } | |
163 | ||
ad7ad57c DM |
164 | static void *dma_4v_alloc_coherent(struct device *dev, size_t size, |
165 | dma_addr_t *dma_addrp, gfp_t gfp) | |
8f6a93a1 | 166 | { |
16ce82d8 | 167 | struct iommu *iommu; |
7c8f486a | 168 | unsigned long flags, order, first_page, npages, n; |
18397944 DM |
169 | void *ret; |
170 | long entry; | |
18397944 DM |
171 | |
172 | size = IO_PAGE_ALIGN(size); | |
173 | order = get_order(size); | |
6a32fd4d | 174 | if (unlikely(order >= MAX_ORDER)) |
18397944 DM |
175 | return NULL; |
176 | ||
177 | npages = size >> IO_PAGE_SHIFT; | |
18397944 | 178 | |
42f14237 | 179 | first_page = __get_free_pages(gfp, order); |
6a32fd4d | 180 | if (unlikely(first_page == 0UL)) |
18397944 | 181 | return NULL; |
e7a0453e | 182 | |
18397944 DM |
183 | memset((char *)first_page, 0, PAGE_SIZE << order); |
184 | ||
ad7ad57c | 185 | iommu = dev->archdata.iommu; |
18397944 DM |
186 | |
187 | spin_lock_irqsave(&iommu->lock, flags); | |
ad7ad57c | 188 | entry = arena_alloc(&iommu->arena, npages); |
18397944 DM |
189 | spin_unlock_irqrestore(&iommu->lock, flags); |
190 | ||
6a32fd4d DM |
191 | if (unlikely(entry < 0L)) |
192 | goto arena_alloc_fail; | |
18397944 DM |
193 | |
194 | *dma_addrp = (iommu->page_table_map_base + | |
195 | (entry << IO_PAGE_SHIFT)); | |
196 | ret = (void *) first_page; | |
197 | first_page = __pa(first_page); | |
198 | ||
6a32fd4d | 199 | local_irq_save(flags); |
18397944 | 200 | |
ad7ad57c DM |
201 | iommu_batch_start(dev, |
202 | (HV_PCI_MAP_ATTR_READ | | |
203 | HV_PCI_MAP_ATTR_WRITE), | |
204 | entry); | |
18397944 | 205 | |
6a32fd4d | 206 | for (n = 0; n < npages; n++) { |
ad7ad57c | 207 | long err = iommu_batch_add(first_page + (n * PAGE_SIZE)); |
6a32fd4d DM |
208 | if (unlikely(err < 0L)) |
209 | goto iommu_map_fail; | |
210 | } | |
18397944 | 211 | |
ad7ad57c | 212 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 213 | goto iommu_map_fail; |
18397944 | 214 | |
6a32fd4d | 215 | local_irq_restore(flags); |
18397944 DM |
216 | |
217 | return ret; | |
6a32fd4d DM |
218 | |
219 | iommu_map_fail: | |
220 | /* Interrupts are disabled. */ | |
221 | spin_lock(&iommu->lock); | |
ad7ad57c | 222 | arena_free(&iommu->arena, entry, npages); |
6a32fd4d DM |
223 | spin_unlock_irqrestore(&iommu->lock, flags); |
224 | ||
225 | arena_alloc_fail: | |
226 | free_pages(first_page, order); | |
227 | return NULL; | |
8f6a93a1 DM |
228 | } |
229 | ||
ad7ad57c DM |
230 | static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu, |
231 | dma_addr_t dvma) | |
8f6a93a1 | 232 | { |
a2fb23af | 233 | struct pci_pbm_info *pbm; |
16ce82d8 | 234 | struct iommu *iommu; |
7c8f486a DM |
235 | unsigned long flags, order, npages, entry; |
236 | u32 devhandle; | |
18397944 DM |
237 | |
238 | npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; | |
ad7ad57c DM |
239 | iommu = dev->archdata.iommu; |
240 | pbm = dev->archdata.host_controller; | |
a2fb23af | 241 | devhandle = pbm->devhandle; |
18397944 DM |
242 | entry = ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT); |
243 | ||
244 | spin_lock_irqsave(&iommu->lock, flags); | |
245 | ||
ad7ad57c | 246 | arena_free(&iommu->arena, entry, npages); |
18397944 DM |
247 | |
248 | do { | |
249 | unsigned long num; | |
250 | ||
251 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
252 | npages); | |
253 | entry += num; | |
254 | npages -= num; | |
255 | } while (npages != 0); | |
256 | ||
257 | spin_unlock_irqrestore(&iommu->lock, flags); | |
258 | ||
259 | order = get_order(size); | |
260 | if (order < 10) | |
261 | free_pages((unsigned long)cpu, order); | |
8f6a93a1 DM |
262 | } |
263 | ||
ad7ad57c DM |
264 | static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz, |
265 | enum dma_data_direction direction) | |
8f6a93a1 | 266 | { |
16ce82d8 | 267 | struct iommu *iommu; |
18397944 | 268 | unsigned long flags, npages, oaddr; |
7c8f486a | 269 | unsigned long i, base_paddr; |
6a32fd4d | 270 | u32 bus_addr, ret; |
18397944 DM |
271 | unsigned long prot; |
272 | long entry; | |
18397944 | 273 | |
ad7ad57c | 274 | iommu = dev->archdata.iommu; |
18397944 | 275 | |
ad7ad57c | 276 | if (unlikely(direction == DMA_NONE)) |
18397944 DM |
277 | goto bad; |
278 | ||
279 | oaddr = (unsigned long)ptr; | |
280 | npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); | |
281 | npages >>= IO_PAGE_SHIFT; | |
18397944 DM |
282 | |
283 | spin_lock_irqsave(&iommu->lock, flags); | |
ad7ad57c | 284 | entry = arena_alloc(&iommu->arena, npages); |
18397944 DM |
285 | spin_unlock_irqrestore(&iommu->lock, flags); |
286 | ||
287 | if (unlikely(entry < 0L)) | |
288 | goto bad; | |
289 | ||
290 | bus_addr = (iommu->page_table_map_base + | |
291 | (entry << IO_PAGE_SHIFT)); | |
292 | ret = bus_addr | (oaddr & ~IO_PAGE_MASK); | |
293 | base_paddr = __pa(oaddr & IO_PAGE_MASK); | |
294 | prot = HV_PCI_MAP_ATTR_READ; | |
ad7ad57c | 295 | if (direction != DMA_TO_DEVICE) |
18397944 DM |
296 | prot |= HV_PCI_MAP_ATTR_WRITE; |
297 | ||
6a32fd4d | 298 | local_irq_save(flags); |
18397944 | 299 | |
ad7ad57c | 300 | iommu_batch_start(dev, prot, entry); |
18397944 | 301 | |
6a32fd4d | 302 | for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE) { |
ad7ad57c | 303 | long err = iommu_batch_add(base_paddr); |
6a32fd4d DM |
304 | if (unlikely(err < 0L)) |
305 | goto iommu_map_fail; | |
306 | } | |
ad7ad57c | 307 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 308 | goto iommu_map_fail; |
18397944 | 309 | |
6a32fd4d | 310 | local_irq_restore(flags); |
18397944 DM |
311 | |
312 | return ret; | |
313 | ||
314 | bad: | |
315 | if (printk_ratelimit()) | |
316 | WARN_ON(1); | |
ad7ad57c | 317 | return DMA_ERROR_CODE; |
6a32fd4d DM |
318 | |
319 | iommu_map_fail: | |
320 | /* Interrupts are disabled. */ | |
321 | spin_lock(&iommu->lock); | |
ad7ad57c | 322 | arena_free(&iommu->arena, entry, npages); |
6a32fd4d DM |
323 | spin_unlock_irqrestore(&iommu->lock, flags); |
324 | ||
ad7ad57c | 325 | return DMA_ERROR_CODE; |
8f6a93a1 DM |
326 | } |
327 | ||
ad7ad57c DM |
328 | static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr, |
329 | size_t sz, enum dma_data_direction direction) | |
8f6a93a1 | 330 | { |
a2fb23af | 331 | struct pci_pbm_info *pbm; |
16ce82d8 | 332 | struct iommu *iommu; |
7c8f486a | 333 | unsigned long flags, npages; |
18397944 | 334 | long entry; |
7c8f486a | 335 | u32 devhandle; |
18397944 | 336 | |
ad7ad57c | 337 | if (unlikely(direction == DMA_NONE)) { |
18397944 DM |
338 | if (printk_ratelimit()) |
339 | WARN_ON(1); | |
340 | return; | |
341 | } | |
342 | ||
ad7ad57c DM |
343 | iommu = dev->archdata.iommu; |
344 | pbm = dev->archdata.host_controller; | |
a2fb23af | 345 | devhandle = pbm->devhandle; |
18397944 DM |
346 | |
347 | npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK); | |
348 | npages >>= IO_PAGE_SHIFT; | |
349 | bus_addr &= IO_PAGE_MASK; | |
350 | ||
351 | spin_lock_irqsave(&iommu->lock, flags); | |
352 | ||
353 | entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT; | |
ad7ad57c | 354 | arena_free(&iommu->arena, entry, npages); |
18397944 DM |
355 | |
356 | do { | |
357 | unsigned long num; | |
358 | ||
359 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
360 | npages); | |
361 | entry += num; | |
362 | npages -= num; | |
363 | } while (npages != 0); | |
364 | ||
365 | spin_unlock_irqrestore(&iommu->lock, flags); | |
366 | } | |
367 | ||
368 | #define SG_ENT_PHYS_ADDRESS(SG) \ | |
369 | (__pa(page_address((SG)->page)) + (SG)->offset) | |
370 | ||
ad7ad57c | 371 | static inline long fill_sg(long entry, struct device *dev, |
18397944 DM |
372 | struct scatterlist *sg, |
373 | int nused, int nelems, unsigned long prot) | |
374 | { | |
375 | struct scatterlist *dma_sg = sg; | |
376 | struct scatterlist *sg_end = sg + nelems; | |
6a32fd4d DM |
377 | unsigned long flags; |
378 | int i; | |
379 | ||
380 | local_irq_save(flags); | |
381 | ||
ad7ad57c | 382 | iommu_batch_start(dev, prot, entry); |
18397944 | 383 | |
18397944 DM |
384 | for (i = 0; i < nused; i++) { |
385 | unsigned long pteval = ~0UL; | |
386 | u32 dma_npages; | |
387 | ||
388 | dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) + | |
389 | dma_sg->dma_length + | |
390 | ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT; | |
391 | do { | |
392 | unsigned long offset; | |
393 | signed int len; | |
394 | ||
395 | /* If we are here, we know we have at least one | |
396 | * more page to map. So walk forward until we | |
397 | * hit a page crossing, and begin creating new | |
398 | * mappings from that spot. | |
399 | */ | |
400 | for (;;) { | |
401 | unsigned long tmp; | |
402 | ||
403 | tmp = SG_ENT_PHYS_ADDRESS(sg); | |
404 | len = sg->length; | |
405 | if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) { | |
406 | pteval = tmp & IO_PAGE_MASK; | |
407 | offset = tmp & (IO_PAGE_SIZE - 1UL); | |
408 | break; | |
409 | } | |
410 | if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) { | |
411 | pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK; | |
412 | offset = 0UL; | |
413 | len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL))); | |
414 | break; | |
415 | } | |
416 | sg++; | |
417 | } | |
418 | ||
419 | pteval = (pteval & IOPTE_PAGE); | |
420 | while (len > 0) { | |
6a32fd4d DM |
421 | long err; |
422 | ||
ad7ad57c | 423 | err = iommu_batch_add(pteval); |
6a32fd4d DM |
424 | if (unlikely(err < 0L)) |
425 | goto iommu_map_failed; | |
426 | ||
18397944 DM |
427 | pteval += IO_PAGE_SIZE; |
428 | len -= (IO_PAGE_SIZE - offset); | |
429 | offset = 0; | |
430 | dma_npages--; | |
431 | } | |
432 | ||
433 | pteval = (pteval & IOPTE_PAGE) + len; | |
434 | sg++; | |
435 | ||
436 | /* Skip over any tail mappings we've fully mapped, | |
437 | * adjusting pteval along the way. Stop when we | |
438 | * detect a page crossing event. | |
439 | */ | |
440 | while (sg < sg_end && | |
441 | (pteval << (64 - IO_PAGE_SHIFT)) != 0UL && | |
442 | (pteval == SG_ENT_PHYS_ADDRESS(sg)) && | |
443 | ((pteval ^ | |
444 | (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) { | |
445 | pteval += sg->length; | |
446 | sg++; | |
447 | } | |
448 | if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL) | |
449 | pteval = ~0UL; | |
450 | } while (dma_npages != 0); | |
451 | dma_sg++; | |
452 | } | |
453 | ||
ad7ad57c | 454 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 455 | goto iommu_map_failed; |
18397944 | 456 | |
6a32fd4d DM |
457 | local_irq_restore(flags); |
458 | return 0; | |
18397944 | 459 | |
6a32fd4d DM |
460 | iommu_map_failed: |
461 | local_irq_restore(flags); | |
462 | return -1L; | |
8f6a93a1 DM |
463 | } |
464 | ||
ad7ad57c DM |
465 | static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, |
466 | int nelems, enum dma_data_direction direction) | |
8f6a93a1 | 467 | { |
16ce82d8 | 468 | struct iommu *iommu; |
7c8f486a | 469 | unsigned long flags, npages, prot; |
6a32fd4d | 470 | u32 dma_base; |
18397944 | 471 | struct scatterlist *sgtmp; |
6a32fd4d | 472 | long entry, err; |
18397944 DM |
473 | int used; |
474 | ||
475 | /* Fast path single entry scatterlists. */ | |
476 | if (nelems == 1) { | |
477 | sglist->dma_address = | |
ad7ad57c DM |
478 | dma_4v_map_single(dev, |
479 | (page_address(sglist->page) + | |
480 | sglist->offset), | |
18397944 | 481 | sglist->length, direction); |
ad7ad57c | 482 | if (unlikely(sglist->dma_address == DMA_ERROR_CODE)) |
18397944 DM |
483 | return 0; |
484 | sglist->dma_length = sglist->length; | |
485 | return 1; | |
486 | } | |
487 | ||
ad7ad57c | 488 | iommu = dev->archdata.iommu; |
18397944 | 489 | |
ad7ad57c | 490 | if (unlikely(direction == DMA_NONE)) |
18397944 DM |
491 | goto bad; |
492 | ||
493 | /* Step 1: Prepare scatter list. */ | |
494 | npages = prepare_sg(sglist, nelems); | |
18397944 DM |
495 | |
496 | /* Step 2: Allocate a cluster and context, if necessary. */ | |
497 | spin_lock_irqsave(&iommu->lock, flags); | |
ad7ad57c | 498 | entry = arena_alloc(&iommu->arena, npages); |
18397944 DM |
499 | spin_unlock_irqrestore(&iommu->lock, flags); |
500 | ||
501 | if (unlikely(entry < 0L)) | |
502 | goto bad; | |
503 | ||
504 | dma_base = iommu->page_table_map_base + | |
505 | (entry << IO_PAGE_SHIFT); | |
506 | ||
507 | /* Step 3: Normalize DMA addresses. */ | |
508 | used = nelems; | |
509 | ||
510 | sgtmp = sglist; | |
511 | while (used && sgtmp->dma_length) { | |
512 | sgtmp->dma_address += dma_base; | |
513 | sgtmp++; | |
514 | used--; | |
515 | } | |
516 | used = nelems - used; | |
517 | ||
518 | /* Step 4: Create the mappings. */ | |
519 | prot = HV_PCI_MAP_ATTR_READ; | |
ad7ad57c | 520 | if (direction != DMA_TO_DEVICE) |
18397944 DM |
521 | prot |= HV_PCI_MAP_ATTR_WRITE; |
522 | ||
ad7ad57c | 523 | err = fill_sg(entry, dev, sglist, used, nelems, prot); |
6a32fd4d DM |
524 | if (unlikely(err < 0L)) |
525 | goto iommu_map_failed; | |
18397944 DM |
526 | |
527 | return used; | |
528 | ||
529 | bad: | |
530 | if (printk_ratelimit()) | |
531 | WARN_ON(1); | |
532 | return 0; | |
6a32fd4d DM |
533 | |
534 | iommu_map_failed: | |
535 | spin_lock_irqsave(&iommu->lock, flags); | |
ad7ad57c | 536 | arena_free(&iommu->arena, entry, npages); |
6a32fd4d DM |
537 | spin_unlock_irqrestore(&iommu->lock, flags); |
538 | ||
539 | return 0; | |
8f6a93a1 DM |
540 | } |
541 | ||
ad7ad57c DM |
542 | static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, |
543 | int nelems, enum dma_data_direction direction) | |
8f6a93a1 | 544 | { |
a2fb23af | 545 | struct pci_pbm_info *pbm; |
16ce82d8 | 546 | struct iommu *iommu; |
7c8f486a | 547 | unsigned long flags, i, npages; |
18397944 | 548 | long entry; |
7c8f486a | 549 | u32 devhandle, bus_addr; |
18397944 | 550 | |
ad7ad57c | 551 | if (unlikely(direction == DMA_NONE)) { |
18397944 DM |
552 | if (printk_ratelimit()) |
553 | WARN_ON(1); | |
554 | } | |
555 | ||
ad7ad57c DM |
556 | iommu = dev->archdata.iommu; |
557 | pbm = dev->archdata.host_controller; | |
a2fb23af | 558 | devhandle = pbm->devhandle; |
18397944 DM |
559 | |
560 | bus_addr = sglist->dma_address & IO_PAGE_MASK; | |
561 | ||
562 | for (i = 1; i < nelems; i++) | |
563 | if (sglist[i].dma_length == 0) | |
564 | break; | |
565 | i--; | |
566 | npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) - | |
567 | bus_addr) >> IO_PAGE_SHIFT; | |
568 | ||
569 | entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT); | |
570 | ||
571 | spin_lock_irqsave(&iommu->lock, flags); | |
572 | ||
ad7ad57c | 573 | arena_free(&iommu->arena, entry, npages); |
18397944 DM |
574 | |
575 | do { | |
576 | unsigned long num; | |
577 | ||
578 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
579 | npages); | |
580 | entry += num; | |
581 | npages -= num; | |
582 | } while (npages != 0); | |
583 | ||
584 | spin_unlock_irqrestore(&iommu->lock, flags); | |
8f6a93a1 DM |
585 | } |
586 | ||
ad7ad57c DM |
587 | static void dma_4v_sync_single_for_cpu(struct device *dev, |
588 | dma_addr_t bus_addr, size_t sz, | |
589 | enum dma_data_direction direction) | |
8f6a93a1 | 590 | { |
18397944 | 591 | /* Nothing to do... */ |
8f6a93a1 DM |
592 | } |
593 | ||
ad7ad57c DM |
594 | static void dma_4v_sync_sg_for_cpu(struct device *dev, |
595 | struct scatterlist *sglist, int nelems, | |
596 | enum dma_data_direction direction) | |
8f6a93a1 | 597 | { |
18397944 | 598 | /* Nothing to do... */ |
8f6a93a1 DM |
599 | } |
600 | ||
ad7ad57c DM |
601 | const struct dma_ops sun4v_dma_ops = { |
602 | .alloc_coherent = dma_4v_alloc_coherent, | |
603 | .free_coherent = dma_4v_free_coherent, | |
604 | .map_single = dma_4v_map_single, | |
605 | .unmap_single = dma_4v_unmap_single, | |
606 | .map_sg = dma_4v_map_sg, | |
607 | .unmap_sg = dma_4v_unmap_sg, | |
608 | .sync_single_for_cpu = dma_4v_sync_single_for_cpu, | |
609 | .sync_sg_for_cpu = dma_4v_sync_sg_for_cpu, | |
8f6a93a1 DM |
610 | }; |
611 | ||
34768bc8 | 612 | static void pci_sun4v_scan_bus(struct pci_pbm_info *pbm) |
bade5622 | 613 | { |
e87dc350 DM |
614 | struct property *prop; |
615 | struct device_node *dp; | |
616 | ||
34768bc8 DM |
617 | dp = pbm->prom_node; |
618 | prop = of_find_property(dp, "66mhz-capable", NULL); | |
619 | pbm->is_66mhz_capable = (prop != NULL); | |
620 | pbm->pci_bus = pci_scan_one_pbm(pbm); | |
c2609267 DM |
621 | |
622 | /* XXX register error interrupt handlers XXX */ | |
bade5622 DM |
623 | } |
624 | ||
e7a0453e | 625 | static unsigned long probe_existing_entries(struct pci_pbm_info *pbm, |
16ce82d8 | 626 | struct iommu *iommu) |
18397944 | 627 | { |
9b3627f3 | 628 | struct iommu_arena *arena = &iommu->arena; |
e7a0453e | 629 | unsigned long i, cnt = 0; |
7c8f486a | 630 | u32 devhandle; |
18397944 DM |
631 | |
632 | devhandle = pbm->devhandle; | |
633 | for (i = 0; i < arena->limit; i++) { | |
634 | unsigned long ret, io_attrs, ra; | |
635 | ||
636 | ret = pci_sun4v_iommu_getmap(devhandle, | |
637 | HV_PCI_TSBID(0, i), | |
638 | &io_attrs, &ra); | |
e7a0453e | 639 | if (ret == HV_EOK) { |
c2a5a46b DM |
640 | if (page_in_phys_avail(ra)) { |
641 | pci_sun4v_iommu_demap(devhandle, | |
642 | HV_PCI_TSBID(0, i), 1); | |
643 | } else { | |
644 | cnt++; | |
645 | __set_bit(i, arena->map); | |
646 | } | |
e7a0453e | 647 | } |
18397944 | 648 | } |
e7a0453e DM |
649 | |
650 | return cnt; | |
18397944 DM |
651 | } |
652 | ||
bade5622 DM |
653 | static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm) |
654 | { | |
16ce82d8 | 655 | struct iommu *iommu = pbm->iommu; |
e87dc350 | 656 | struct property *prop; |
59db8102 | 657 | unsigned long num_tsb_entries, sz, tsbsize; |
18397944 | 658 | u32 vdma[2], dma_mask, dma_offset; |
e87dc350 DM |
659 | |
660 | prop = of_find_property(pbm->prom_node, "virtual-dma", NULL); | |
661 | if (prop) { | |
662 | u32 *val = prop->value; | |
18397944 | 663 | |
e87dc350 DM |
664 | vdma[0] = val[0]; |
665 | vdma[1] = val[1]; | |
666 | } else { | |
18397944 DM |
667 | /* No property, use default values. */ |
668 | vdma[0] = 0x80000000; | |
669 | vdma[1] = 0x80000000; | |
670 | } | |
671 | ||
59db8102 DM |
672 | if ((vdma[0] | vdma[1]) & ~IO_PAGE_MASK) { |
673 | prom_printf("PCI-SUN4V: strange virtual-dma[%08x:%08x].\n", | |
674 | vdma[0], vdma[1]); | |
675 | prom_halt(); | |
18397944 DM |
676 | }; |
677 | ||
59db8102 DM |
678 | dma_mask = (roundup_pow_of_two(vdma[1]) - 1UL); |
679 | num_tsb_entries = vdma[1] / IO_PAGE_SIZE; | |
680 | tsbsize = num_tsb_entries * sizeof(iopte_t); | |
18397944 DM |
681 | |
682 | dma_offset = vdma[0]; | |
683 | ||
684 | /* Setup initial software IOMMU state. */ | |
685 | spin_lock_init(&iommu->lock); | |
686 | iommu->ctx_lowest_free = 1; | |
687 | iommu->page_table_map_base = dma_offset; | |
688 | iommu->dma_addr_mask = dma_mask; | |
689 | ||
690 | /* Allocate and initialize the free area map. */ | |
59db8102 | 691 | sz = (num_tsb_entries + 7) / 8; |
18397944 | 692 | sz = (sz + 7UL) & ~7UL; |
982c2064 | 693 | iommu->arena.map = kzalloc(sz, GFP_KERNEL); |
18397944 DM |
694 | if (!iommu->arena.map) { |
695 | prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n"); | |
696 | prom_halt(); | |
697 | } | |
18397944 DM |
698 | iommu->arena.limit = num_tsb_entries; |
699 | ||
e7a0453e | 700 | sz = probe_existing_entries(pbm, iommu); |
c2a5a46b DM |
701 | if (sz) |
702 | printk("%s: Imported %lu TSB entries from OBP\n", | |
703 | pbm->name, sz); | |
bade5622 DM |
704 | } |
705 | ||
35a17eb6 DM |
706 | #ifdef CONFIG_PCI_MSI |
707 | struct pci_sun4v_msiq_entry { | |
708 | u64 version_type; | |
709 | #define MSIQ_VERSION_MASK 0xffffffff00000000UL | |
710 | #define MSIQ_VERSION_SHIFT 32 | |
711 | #define MSIQ_TYPE_MASK 0x00000000000000ffUL | |
712 | #define MSIQ_TYPE_SHIFT 0 | |
713 | #define MSIQ_TYPE_NONE 0x00 | |
714 | #define MSIQ_TYPE_MSG 0x01 | |
715 | #define MSIQ_TYPE_MSI32 0x02 | |
716 | #define MSIQ_TYPE_MSI64 0x03 | |
717 | #define MSIQ_TYPE_INTX 0x08 | |
718 | #define MSIQ_TYPE_NONE2 0xff | |
719 | ||
720 | u64 intx_sysino; | |
721 | u64 reserved1; | |
722 | u64 stick; | |
723 | u64 req_id; /* bus/device/func */ | |
724 | #define MSIQ_REQID_BUS_MASK 0xff00UL | |
725 | #define MSIQ_REQID_BUS_SHIFT 8 | |
726 | #define MSIQ_REQID_DEVICE_MASK 0x00f8UL | |
727 | #define MSIQ_REQID_DEVICE_SHIFT 3 | |
728 | #define MSIQ_REQID_FUNC_MASK 0x0007UL | |
729 | #define MSIQ_REQID_FUNC_SHIFT 0 | |
730 | ||
731 | u64 msi_address; | |
732 | ||
e5dd42e4 | 733 | /* The format of this value is message type dependent. |
35a17eb6 DM |
734 | * For MSI bits 15:0 are the data from the MSI packet. |
735 | * For MSI-X bits 31:0 are the data from the MSI packet. | |
736 | * For MSG, the message code and message routing code where: | |
737 | * bits 39:32 is the bus/device/fn of the msg target-id | |
738 | * bits 18:16 is the message routing code | |
739 | * bits 7:0 is the message code | |
740 | * For INTx the low order 2-bits are: | |
741 | * 00 - INTA | |
742 | * 01 - INTB | |
743 | * 10 - INTC | |
744 | * 11 - INTD | |
745 | */ | |
746 | u64 msi_data; | |
747 | ||
748 | u64 reserved2; | |
749 | }; | |
750 | ||
751 | /* For now this just runs as a pre-handler for the real interrupt handler. | |
752 | * So we just walk through the queue and ACK all the entries, update the | |
753 | * head pointer, and return. | |
754 | * | |
755 | * In the longer term it would be nice to do something more integrated | |
756 | * wherein we can pass in some of this MSI info to the drivers. This | |
757 | * would be most useful for PCIe fabric error messages, although we could | |
758 | * invoke those directly from the loop here in order to pass the info around. | |
759 | */ | |
760 | static void pci_sun4v_msi_prehandler(unsigned int ino, void *data1, void *data2) | |
761 | { | |
762 | struct pci_pbm_info *pbm = data1; | |
763 | struct pci_sun4v_msiq_entry *base, *ep; | |
764 | unsigned long msiqid, orig_head, head, type, err; | |
765 | ||
766 | msiqid = (unsigned long) data2; | |
767 | ||
768 | head = 0xdeadbeef; | |
769 | err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, &head); | |
770 | if (unlikely(err)) | |
771 | goto hv_error_get; | |
772 | ||
773 | if (unlikely(head >= (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry)))) | |
774 | goto bad_offset; | |
775 | ||
776 | head /= sizeof(struct pci_sun4v_msiq_entry); | |
777 | orig_head = head; | |
778 | base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * | |
779 | (pbm->msiq_ent_count * | |
780 | sizeof(struct pci_sun4v_msiq_entry)))); | |
781 | ep = &base[head]; | |
782 | while ((ep->version_type & MSIQ_TYPE_MASK) != 0) { | |
783 | type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; | |
784 | if (unlikely(type != MSIQ_TYPE_MSI32 && | |
785 | type != MSIQ_TYPE_MSI64)) | |
786 | goto bad_type; | |
787 | ||
788 | pci_sun4v_msi_setstate(pbm->devhandle, | |
789 | ep->msi_data /* msi_num */, | |
790 | HV_MSISTATE_IDLE); | |
791 | ||
792 | /* Clear the entry. */ | |
793 | ep->version_type &= ~MSIQ_TYPE_MASK; | |
794 | ||
795 | /* Go to next entry in ring. */ | |
796 | head++; | |
797 | if (head >= pbm->msiq_ent_count) | |
798 | head = 0; | |
799 | ep = &base[head]; | |
800 | } | |
801 | ||
802 | if (likely(head != orig_head)) { | |
803 | /* ACK entries by updating head pointer. */ | |
804 | head *= sizeof(struct pci_sun4v_msiq_entry); | |
805 | err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); | |
806 | if (unlikely(err)) | |
807 | goto hv_error_set; | |
808 | } | |
809 | return; | |
810 | ||
811 | hv_error_set: | |
812 | printk(KERN_EMERG "MSI: Hypervisor set head gives error %lu\n", err); | |
813 | goto hv_error_cont; | |
814 | ||
815 | hv_error_get: | |
816 | printk(KERN_EMERG "MSI: Hypervisor get head gives error %lu\n", err); | |
817 | ||
818 | hv_error_cont: | |
819 | printk(KERN_EMERG "MSI: devhandle[%x] msiqid[%lx] head[%lu]\n", | |
820 | pbm->devhandle, msiqid, head); | |
821 | return; | |
822 | ||
823 | bad_offset: | |
824 | printk(KERN_EMERG "MSI: Hypervisor gives bad offset %lx max(%lx)\n", | |
825 | head, pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry)); | |
826 | return; | |
827 | ||
828 | bad_type: | |
829 | printk(KERN_EMERG "MSI: Entry has bad type %lx\n", type); | |
830 | return; | |
831 | } | |
832 | ||
833 | static int msi_bitmap_alloc(struct pci_pbm_info *pbm) | |
834 | { | |
835 | unsigned long size, bits_per_ulong; | |
836 | ||
837 | bits_per_ulong = sizeof(unsigned long) * 8; | |
838 | size = (pbm->msi_num + (bits_per_ulong - 1)) & ~(bits_per_ulong - 1); | |
839 | size /= 8; | |
840 | BUG_ON(size % sizeof(unsigned long)); | |
841 | ||
842 | pbm->msi_bitmap = kzalloc(size, GFP_KERNEL); | |
843 | if (!pbm->msi_bitmap) | |
844 | return -ENOMEM; | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static void msi_bitmap_free(struct pci_pbm_info *pbm) | |
850 | { | |
851 | kfree(pbm->msi_bitmap); | |
852 | pbm->msi_bitmap = NULL; | |
853 | } | |
854 | ||
855 | static int msi_queue_alloc(struct pci_pbm_info *pbm) | |
856 | { | |
857 | unsigned long q_size, alloc_size, pages, order; | |
858 | int i; | |
859 | ||
860 | q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); | |
861 | alloc_size = (pbm->msiq_num * q_size); | |
862 | order = get_order(alloc_size); | |
863 | pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order); | |
864 | if (pages == 0UL) { | |
865 | printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n", | |
866 | order); | |
867 | return -ENOMEM; | |
868 | } | |
869 | memset((char *)pages, 0, PAGE_SIZE << order); | |
870 | pbm->msi_queues = (void *) pages; | |
871 | ||
872 | for (i = 0; i < pbm->msiq_num; i++) { | |
873 | unsigned long err, base = __pa(pages + (i * q_size)); | |
874 | unsigned long ret1, ret2; | |
875 | ||
876 | err = pci_sun4v_msiq_conf(pbm->devhandle, | |
877 | pbm->msiq_first + i, | |
878 | base, pbm->msiq_ent_count); | |
879 | if (err) { | |
880 | printk(KERN_ERR "MSI: msiq register fails (err=%lu)\n", | |
881 | err); | |
882 | goto h_error; | |
883 | } | |
884 | ||
885 | err = pci_sun4v_msiq_info(pbm->devhandle, | |
886 | pbm->msiq_first + i, | |
887 | &ret1, &ret2); | |
888 | if (err) { | |
889 | printk(KERN_ERR "MSI: Cannot read msiq (err=%lu)\n", | |
890 | err); | |
891 | goto h_error; | |
892 | } | |
893 | if (ret1 != base || ret2 != pbm->msiq_ent_count) { | |
894 | printk(KERN_ERR "MSI: Bogus qconf " | |
895 | "expected[%lx:%x] got[%lx:%lx]\n", | |
896 | base, pbm->msiq_ent_count, | |
897 | ret1, ret2); | |
898 | goto h_error; | |
899 | } | |
900 | } | |
901 | ||
902 | return 0; | |
903 | ||
904 | h_error: | |
905 | free_pages(pages, order); | |
906 | return -EINVAL; | |
907 | } | |
908 | ||
35a17eb6 DM |
909 | |
910 | static int alloc_msi(struct pci_pbm_info *pbm) | |
911 | { | |
912 | int i; | |
913 | ||
914 | for (i = 0; i < pbm->msi_num; i++) { | |
915 | if (!test_and_set_bit(i, pbm->msi_bitmap)) | |
916 | return i + pbm->msi_first; | |
917 | } | |
918 | ||
919 | return -ENOENT; | |
920 | } | |
921 | ||
922 | static void free_msi(struct pci_pbm_info *pbm, int msi_num) | |
923 | { | |
924 | msi_num -= pbm->msi_first; | |
925 | clear_bit(msi_num, pbm->msi_bitmap); | |
926 | } | |
927 | ||
928 | static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, | |
929 | struct pci_dev *pdev, | |
930 | struct msi_desc *entry) | |
931 | { | |
a2fb23af | 932 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
35a17eb6 DM |
933 | unsigned long devino, msiqid; |
934 | struct msi_msg msg; | |
935 | int msi_num, err; | |
936 | ||
937 | *virt_irq_p = 0; | |
938 | ||
939 | msi_num = alloc_msi(pbm); | |
940 | if (msi_num < 0) | |
941 | return msi_num; | |
942 | ||
5f92c329 DM |
943 | err = sun4v_build_msi(pbm->devhandle, virt_irq_p, |
944 | pbm->msiq_first_devino, | |
945 | (pbm->msiq_first_devino + | |
946 | pbm->msiq_num)); | |
947 | if (err < 0) | |
35a17eb6 | 948 | goto out_err; |
5f92c329 | 949 | devino = err; |
35a17eb6 | 950 | |
35a17eb6 DM |
951 | msiqid = ((devino - pbm->msiq_first_devino) + |
952 | pbm->msiq_first); | |
953 | ||
954 | err = -EINVAL; | |
955 | if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) | |
956 | if (err) | |
957 | goto out_err; | |
958 | ||
959 | if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) | |
960 | goto out_err; | |
961 | ||
962 | if (pci_sun4v_msi_setmsiq(pbm->devhandle, | |
963 | msi_num, msiqid, | |
964 | (entry->msi_attrib.is_64 ? | |
965 | HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) | |
966 | goto out_err; | |
967 | ||
968 | if (pci_sun4v_msi_setstate(pbm->devhandle, msi_num, HV_MSISTATE_IDLE)) | |
969 | goto out_err; | |
970 | ||
971 | if (pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_VALID)) | |
972 | goto out_err; | |
973 | ||
5f92c329 | 974 | sparc64_set_msi(*virt_irq_p, msi_num); |
35a17eb6 DM |
975 | |
976 | if (entry->msi_attrib.is_64) { | |
977 | msg.address_hi = pbm->msi64_start >> 32; | |
978 | msg.address_lo = pbm->msi64_start & 0xffffffff; | |
979 | } else { | |
980 | msg.address_hi = 0; | |
981 | msg.address_lo = pbm->msi32_start; | |
982 | } | |
983 | msg.data = msi_num; | |
7fe3730d ME |
984 | |
985 | set_irq_msi(*virt_irq_p, entry); | |
35a17eb6 DM |
986 | write_msi_msg(*virt_irq_p, &msg); |
987 | ||
988 | irq_install_pre_handler(*virt_irq_p, | |
989 | pci_sun4v_msi_prehandler, | |
990 | pbm, (void *) msiqid); | |
991 | ||
992 | return 0; | |
993 | ||
994 | out_err: | |
995 | free_msi(pbm, msi_num); | |
35a17eb6 DM |
996 | return err; |
997 | ||
998 | } | |
999 | ||
1000 | static void pci_sun4v_teardown_msi_irq(unsigned int virt_irq, | |
1001 | struct pci_dev *pdev) | |
1002 | { | |
a2fb23af | 1003 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
35a17eb6 DM |
1004 | unsigned long msiqid, err; |
1005 | unsigned int msi_num; | |
1006 | ||
5f92c329 | 1007 | msi_num = sparc64_get_msi(virt_irq); |
35a17eb6 DM |
1008 | err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi_num, &msiqid); |
1009 | if (err) { | |
1010 | printk(KERN_ERR "%s: getmsiq gives error %lu\n", | |
1011 | pbm->name, err); | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_INVALID); | |
1016 | pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_INVALID); | |
1017 | ||
1018 | free_msi(pbm, msi_num); | |
1019 | ||
1020 | /* The sun4v_destroy_msi() will liberate the devino and thus the MSIQ | |
1021 | * allocation. | |
1022 | */ | |
1023 | sun4v_destroy_msi(virt_irq); | |
1024 | } | |
e9870c4c DM |
1025 | |
1026 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) | |
1027 | { | |
1028 | const u32 *val; | |
1029 | int len; | |
1030 | ||
1031 | val = of_get_property(pbm->prom_node, "#msi-eqs", &len); | |
1032 | if (!val || len != 4) | |
1033 | goto no_msi; | |
1034 | pbm->msiq_num = *val; | |
1035 | if (pbm->msiq_num) { | |
1036 | const struct msiq_prop { | |
1037 | u32 first_msiq; | |
1038 | u32 num_msiq; | |
1039 | u32 first_devino; | |
1040 | } *mqp; | |
1041 | const struct msi_range_prop { | |
1042 | u32 first_msi; | |
1043 | u32 num_msi; | |
1044 | } *mrng; | |
1045 | const struct addr_range_prop { | |
1046 | u32 msi32_high; | |
1047 | u32 msi32_low; | |
1048 | u32 msi32_len; | |
1049 | u32 msi64_high; | |
1050 | u32 msi64_low; | |
1051 | u32 msi64_len; | |
1052 | } *arng; | |
1053 | ||
1054 | val = of_get_property(pbm->prom_node, "msi-eq-size", &len); | |
1055 | if (!val || len != 4) | |
1056 | goto no_msi; | |
1057 | ||
1058 | pbm->msiq_ent_count = *val; | |
1059 | ||
1060 | mqp = of_get_property(pbm->prom_node, | |
1061 | "msi-eq-to-devino", &len); | |
1062 | if (!mqp || len != sizeof(struct msiq_prop)) | |
1063 | goto no_msi; | |
1064 | ||
1065 | pbm->msiq_first = mqp->first_msiq; | |
1066 | pbm->msiq_first_devino = mqp->first_devino; | |
1067 | ||
1068 | val = of_get_property(pbm->prom_node, "#msi", &len); | |
1069 | if (!val || len != 4) | |
1070 | goto no_msi; | |
1071 | pbm->msi_num = *val; | |
1072 | ||
1073 | mrng = of_get_property(pbm->prom_node, "msi-ranges", &len); | |
1074 | if (!mrng || len != sizeof(struct msi_range_prop)) | |
1075 | goto no_msi; | |
1076 | pbm->msi_first = mrng->first_msi; | |
1077 | ||
1078 | val = of_get_property(pbm->prom_node, "msi-data-mask", &len); | |
1079 | if (!val || len != 4) | |
1080 | goto no_msi; | |
1081 | pbm->msi_data_mask = *val; | |
1082 | ||
1083 | val = of_get_property(pbm->prom_node, "msix-data-width", &len); | |
1084 | if (!val || len != 4) | |
1085 | goto no_msi; | |
1086 | pbm->msix_data_width = *val; | |
1087 | ||
1088 | arng = of_get_property(pbm->prom_node, "msi-address-ranges", | |
1089 | &len); | |
1090 | if (!arng || len != sizeof(struct addr_range_prop)) | |
1091 | goto no_msi; | |
1092 | pbm->msi32_start = ((u64)arng->msi32_high << 32) | | |
1093 | (u64) arng->msi32_low; | |
1094 | pbm->msi64_start = ((u64)arng->msi64_high << 32) | | |
1095 | (u64) arng->msi64_low; | |
1096 | pbm->msi32_len = arng->msi32_len; | |
1097 | pbm->msi64_len = arng->msi64_len; | |
1098 | ||
1099 | if (msi_bitmap_alloc(pbm)) | |
1100 | goto no_msi; | |
1101 | ||
1102 | if (msi_queue_alloc(pbm)) { | |
1103 | msi_bitmap_free(pbm); | |
1104 | goto no_msi; | |
1105 | } | |
1106 | ||
1107 | printk(KERN_INFO "%s: MSI Queue first[%u] num[%u] count[%u] " | |
1108 | "devino[0x%x]\n", | |
1109 | pbm->name, | |
1110 | pbm->msiq_first, pbm->msiq_num, | |
1111 | pbm->msiq_ent_count, | |
1112 | pbm->msiq_first_devino); | |
1113 | printk(KERN_INFO "%s: MSI first[%u] num[%u] mask[0x%x] " | |
1114 | "width[%u]\n", | |
1115 | pbm->name, | |
1116 | pbm->msi_first, pbm->msi_num, pbm->msi_data_mask, | |
1117 | pbm->msix_data_width); | |
1118 | printk(KERN_INFO "%s: MSI addr32[0x%lx:0x%x] " | |
1119 | "addr64[0x%lx:0x%x]\n", | |
1120 | pbm->name, | |
1121 | pbm->msi32_start, pbm->msi32_len, | |
1122 | pbm->msi64_start, pbm->msi64_len); | |
1123 | printk(KERN_INFO "%s: MSI queues at RA [%p]\n", | |
1124 | pbm->name, | |
1125 | pbm->msi_queues); | |
1126 | } | |
1127 | pbm->setup_msi_irq = pci_sun4v_setup_msi_irq; | |
1128 | pbm->teardown_msi_irq = pci_sun4v_teardown_msi_irq; | |
1129 | ||
1130 | return; | |
1131 | ||
1132 | no_msi: | |
1133 | pbm->msiq_num = 0; | |
1134 | printk(KERN_INFO "%s: No MSI support.\n", pbm->name); | |
1135 | } | |
35a17eb6 DM |
1136 | #else /* CONFIG_PCI_MSI */ |
1137 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) | |
1138 | { | |
1139 | } | |
1140 | #endif /* !(CONFIG_PCI_MSI) */ | |
1141 | ||
f0429bf7 | 1142 | static void __init pci_sun4v_pbm_init(struct pci_controller_info *p, struct device_node *dp, u32 devhandle) |
bade5622 DM |
1143 | { |
1144 | struct pci_pbm_info *pbm; | |
bade5622 | 1145 | |
3833789b DM |
1146 | if (devhandle & 0x40) |
1147 | pbm = &p->pbm_B; | |
1148 | else | |
1149 | pbm = &p->pbm_A; | |
bade5622 | 1150 | |
34768bc8 DM |
1151 | pbm->next = pci_pbm_root; |
1152 | pci_pbm_root = pbm; | |
1153 | ||
1154 | pbm->scan_bus = pci_sun4v_scan_bus; | |
ca3dd88e DM |
1155 | pbm->pci_ops = &sun4v_pci_ops; |
1156 | pbm->config_space_reg_bits = 12; | |
34768bc8 | 1157 | |
6c108f12 DM |
1158 | pbm->index = pci_num_pbms++; |
1159 | ||
bade5622 | 1160 | pbm->parent = p; |
e87dc350 | 1161 | pbm->prom_node = dp; |
bade5622 | 1162 | |
3833789b | 1163 | pbm->devhandle = devhandle; |
bade5622 | 1164 | |
e87dc350 | 1165 | pbm->name = dp->full_name; |
bade5622 | 1166 | |
e87dc350 | 1167 | printk("%s: SUN4V PCI Bus Module\n", pbm->name); |
bade5622 | 1168 | |
9fd8b647 | 1169 | pci_determine_mem_io_space(pbm); |
bade5622 | 1170 | |
cfa0652c | 1171 | pci_get_pbm_props(pbm); |
bade5622 | 1172 | pci_sun4v_iommu_init(pbm); |
35a17eb6 | 1173 | pci_sun4v_msi_init(pbm); |
bade5622 DM |
1174 | } |
1175 | ||
f0429bf7 | 1176 | void __init sun4v_pci_init(struct device_node *dp, char *model_name) |
8f6a93a1 | 1177 | { |
e01c0d6d | 1178 | static int hvapi_negotiated = 0; |
bade5622 | 1179 | struct pci_controller_info *p; |
34768bc8 | 1180 | struct pci_pbm_info *pbm; |
16ce82d8 | 1181 | struct iommu *iommu; |
e87dc350 DM |
1182 | struct property *prop; |
1183 | struct linux_prom64_registers *regs; | |
7c8f486a DM |
1184 | u32 devhandle; |
1185 | int i; | |
3833789b | 1186 | |
e01c0d6d DM |
1187 | if (!hvapi_negotiated++) { |
1188 | int err = sun4v_hvapi_register(HV_GRP_PCI, | |
1189 | vpci_major, | |
1190 | &vpci_minor); | |
1191 | ||
1192 | if (err) { | |
1193 | prom_printf("SUN4V_PCI: Could not register hvapi, " | |
1194 | "err=%d\n", err); | |
1195 | prom_halt(); | |
1196 | } | |
1197 | printk("SUN4V_PCI: Registered hvapi major[%lu] minor[%lu]\n", | |
1198 | vpci_major, vpci_minor); | |
ad7ad57c DM |
1199 | |
1200 | dma_ops = &sun4v_dma_ops; | |
e01c0d6d DM |
1201 | } |
1202 | ||
e87dc350 DM |
1203 | prop = of_find_property(dp, "reg", NULL); |
1204 | regs = prop->value; | |
1205 | ||
1206 | devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff; | |
3833789b | 1207 | |
34768bc8 | 1208 | for (pbm = pci_pbm_root; pbm; pbm = pbm->next) { |
0b522497 | 1209 | if (pbm->devhandle == (devhandle ^ 0x40)) { |
34768bc8 | 1210 | pci_sun4v_pbm_init(pbm->parent, dp, devhandle); |
0b522497 DM |
1211 | return; |
1212 | } | |
3833789b | 1213 | } |
bade5622 | 1214 | |
a283a525 | 1215 | for_each_possible_cpu(i) { |
7c8f486a DM |
1216 | unsigned long page = get_zeroed_page(GFP_ATOMIC); |
1217 | ||
1218 | if (!page) | |
1219 | goto fatal_memory_error; | |
1220 | ||
ad7ad57c | 1221 | per_cpu(iommu_batch, i).pglist = (u64 *) page; |
bade5622 | 1222 | } |
7c8f486a | 1223 | |
982c2064 | 1224 | p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); |
7c8f486a DM |
1225 | if (!p) |
1226 | goto fatal_memory_error; | |
1227 | ||
16ce82d8 | 1228 | iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC); |
7c8f486a DM |
1229 | if (!iommu) |
1230 | goto fatal_memory_error; | |
1231 | ||
bade5622 DM |
1232 | p->pbm_A.iommu = iommu; |
1233 | ||
16ce82d8 | 1234 | iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC); |
7c8f486a DM |
1235 | if (!iommu) |
1236 | goto fatal_memory_error; | |
1237 | ||
bade5622 DM |
1238 | p->pbm_B.iommu = iommu; |
1239 | ||
bade5622 DM |
1240 | /* Like PSYCHO and SCHIZO we have a 2GB aligned area |
1241 | * for memory space. | |
1242 | */ | |
1243 | pci_memspace_mask = 0x7fffffffUL; | |
1244 | ||
e87dc350 | 1245 | pci_sun4v_pbm_init(p, dp, devhandle); |
7c8f486a DM |
1246 | return; |
1247 | ||
1248 | fatal_memory_error: | |
1249 | prom_printf("SUN4V_PCI: Fatal memory allocation error.\n"); | |
1250 | prom_halt(); | |
8f6a93a1 | 1251 | } |