Commit | Line | Data |
---|---|---|
8f6a93a1 DM |
1 | /* pci_sun4v.c: SUN4V specific PCI controller support. |
2 | * | |
d284142c | 3 | * Copyright (C) 2006, 2007, 2008 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> |
3822b509 | 16 | #include <linux/of_device.h> |
8f6a93a1 | 17 | |
8f6a93a1 DM |
18 | #include <asm/iommu.h> |
19 | #include <asm/irq.h> | |
8f6a93a1 | 20 | #include <asm/hypervisor.h> |
e87dc350 | 21 | #include <asm/prom.h> |
8f6a93a1 DM |
22 | |
23 | #include "pci_impl.h" | |
24 | #include "iommu_common.h" | |
25 | ||
bade5622 DM |
26 | #include "pci_sun4v.h" |
27 | ||
3822b509 DM |
28 | #define DRIVER_NAME "pci_sun4v" |
29 | #define PFX DRIVER_NAME ": " | |
30 | ||
e01c0d6d DM |
31 | static unsigned long vpci_major = 1; |
32 | static unsigned long vpci_minor = 1; | |
33 | ||
7c8f486a | 34 | #define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) |
18397944 | 35 | |
16ce82d8 | 36 | struct iommu_batch { |
ad7ad57c | 37 | struct device *dev; /* Device mapping is for. */ |
6a32fd4d DM |
38 | unsigned long prot; /* IOMMU page protections */ |
39 | unsigned long entry; /* Index into IOTSB. */ | |
40 | u64 *pglist; /* List of physical pages */ | |
41 | unsigned long npages; /* Number of pages in list. */ | |
18397944 DM |
42 | }; |
43 | ||
ad7ad57c | 44 | static DEFINE_PER_CPU(struct iommu_batch, iommu_batch); |
d3ae4b5b | 45 | static int iommu_batch_initialized; |
6a32fd4d DM |
46 | |
47 | /* Interrupts must be disabled. */ | |
ad7ad57c | 48 | static inline void iommu_batch_start(struct device *dev, unsigned long prot, unsigned long entry) |
6a32fd4d | 49 | { |
ad7ad57c | 50 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d | 51 | |
ad7ad57c | 52 | p->dev = dev; |
6a32fd4d DM |
53 | p->prot = prot; |
54 | p->entry = entry; | |
55 | p->npages = 0; | |
56 | } | |
57 | ||
58 | /* Interrupts must be disabled. */ | |
ad7ad57c | 59 | static long iommu_batch_flush(struct iommu_batch *p) |
6a32fd4d | 60 | { |
ad7ad57c | 61 | struct pci_pbm_info *pbm = p->dev->archdata.host_controller; |
a2fb23af | 62 | unsigned long devhandle = pbm->devhandle; |
6a32fd4d DM |
63 | unsigned long prot = p->prot; |
64 | unsigned long entry = p->entry; | |
65 | u64 *pglist = p->pglist; | |
66 | unsigned long npages = p->npages; | |
67 | ||
d82965c1 | 68 | while (npages != 0) { |
6a32fd4d DM |
69 | long num; |
70 | ||
71 | num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry), | |
72 | npages, prot, __pa(pglist)); | |
73 | if (unlikely(num < 0)) { | |
74 | if (printk_ratelimit()) | |
ad7ad57c | 75 | printk("iommu_batch_flush: IOMMU map of " |
6a32fd4d DM |
76 | "[%08lx:%08lx:%lx:%lx:%lx] failed with " |
77 | "status %ld\n", | |
78 | devhandle, HV_PCI_TSBID(0, entry), | |
79 | npages, prot, __pa(pglist), num); | |
80 | return -1; | |
81 | } | |
82 | ||
83 | entry += num; | |
84 | npages -= num; | |
85 | pglist += num; | |
d82965c1 | 86 | } |
6a32fd4d DM |
87 | |
88 | p->entry = entry; | |
89 | p->npages = 0; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
13fa14e1 DM |
94 | static inline void iommu_batch_new_entry(unsigned long entry) |
95 | { | |
96 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); | |
97 | ||
98 | if (p->entry + p->npages == entry) | |
99 | return; | |
100 | if (p->entry != ~0UL) | |
101 | iommu_batch_flush(p); | |
102 | p->entry = entry; | |
103 | } | |
104 | ||
6a32fd4d | 105 | /* Interrupts must be disabled. */ |
ad7ad57c | 106 | static inline long iommu_batch_add(u64 phys_page) |
6a32fd4d | 107 | { |
ad7ad57c | 108 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d DM |
109 | |
110 | BUG_ON(p->npages >= PGLIST_NENTS); | |
111 | ||
112 | p->pglist[p->npages++] = phys_page; | |
113 | if (p->npages == PGLIST_NENTS) | |
ad7ad57c | 114 | return iommu_batch_flush(p); |
6a32fd4d DM |
115 | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* Interrupts must be disabled. */ | |
ad7ad57c | 120 | static inline long iommu_batch_end(void) |
6a32fd4d | 121 | { |
ad7ad57c | 122 | struct iommu_batch *p = &__get_cpu_var(iommu_batch); |
6a32fd4d DM |
123 | |
124 | BUG_ON(p->npages >= PGLIST_NENTS); | |
125 | ||
ad7ad57c | 126 | return iommu_batch_flush(p); |
6a32fd4d | 127 | } |
18397944 | 128 | |
ad7ad57c DM |
129 | static void *dma_4v_alloc_coherent(struct device *dev, size_t size, |
130 | dma_addr_t *dma_addrp, gfp_t gfp) | |
8f6a93a1 | 131 | { |
7c8f486a | 132 | unsigned long flags, order, first_page, npages, n; |
c1b1a5f1 DM |
133 | struct iommu *iommu; |
134 | struct page *page; | |
18397944 DM |
135 | void *ret; |
136 | long entry; | |
c1b1a5f1 | 137 | int nid; |
18397944 DM |
138 | |
139 | size = IO_PAGE_ALIGN(size); | |
140 | order = get_order(size); | |
6a32fd4d | 141 | if (unlikely(order >= MAX_ORDER)) |
18397944 DM |
142 | return NULL; |
143 | ||
144 | npages = size >> IO_PAGE_SHIFT; | |
18397944 | 145 | |
c1b1a5f1 DM |
146 | nid = dev->archdata.numa_node; |
147 | page = alloc_pages_node(nid, gfp, order); | |
148 | if (unlikely(!page)) | |
18397944 | 149 | return NULL; |
e7a0453e | 150 | |
c1b1a5f1 | 151 | first_page = (unsigned long) page_address(page); |
18397944 DM |
152 | memset((char *)first_page, 0, PAGE_SIZE << order); |
153 | ||
ad7ad57c | 154 | iommu = dev->archdata.iommu; |
18397944 DM |
155 | |
156 | spin_lock_irqsave(&iommu->lock, flags); | |
d284142c | 157 | entry = iommu_range_alloc(dev, iommu, npages, NULL); |
18397944 DM |
158 | spin_unlock_irqrestore(&iommu->lock, flags); |
159 | ||
d284142c DM |
160 | if (unlikely(entry == DMA_ERROR_CODE)) |
161 | goto range_alloc_fail; | |
18397944 DM |
162 | |
163 | *dma_addrp = (iommu->page_table_map_base + | |
164 | (entry << IO_PAGE_SHIFT)); | |
165 | ret = (void *) first_page; | |
166 | first_page = __pa(first_page); | |
167 | ||
6a32fd4d | 168 | local_irq_save(flags); |
18397944 | 169 | |
ad7ad57c DM |
170 | iommu_batch_start(dev, |
171 | (HV_PCI_MAP_ATTR_READ | | |
172 | HV_PCI_MAP_ATTR_WRITE), | |
173 | entry); | |
18397944 | 174 | |
6a32fd4d | 175 | for (n = 0; n < npages; n++) { |
ad7ad57c | 176 | long err = iommu_batch_add(first_page + (n * PAGE_SIZE)); |
6a32fd4d DM |
177 | if (unlikely(err < 0L)) |
178 | goto iommu_map_fail; | |
179 | } | |
18397944 | 180 | |
ad7ad57c | 181 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 182 | goto iommu_map_fail; |
18397944 | 183 | |
6a32fd4d | 184 | local_irq_restore(flags); |
18397944 DM |
185 | |
186 | return ret; | |
6a32fd4d DM |
187 | |
188 | iommu_map_fail: | |
189 | /* Interrupts are disabled. */ | |
190 | spin_lock(&iommu->lock); | |
d284142c | 191 | iommu_range_free(iommu, *dma_addrp, npages); |
6a32fd4d DM |
192 | spin_unlock_irqrestore(&iommu->lock, flags); |
193 | ||
d284142c | 194 | range_alloc_fail: |
6a32fd4d DM |
195 | free_pages(first_page, order); |
196 | return NULL; | |
8f6a93a1 DM |
197 | } |
198 | ||
ad7ad57c DM |
199 | static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu, |
200 | dma_addr_t dvma) | |
8f6a93a1 | 201 | { |
a2fb23af | 202 | struct pci_pbm_info *pbm; |
16ce82d8 | 203 | struct iommu *iommu; |
7c8f486a DM |
204 | unsigned long flags, order, npages, entry; |
205 | u32 devhandle; | |
18397944 DM |
206 | |
207 | npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; | |
ad7ad57c DM |
208 | iommu = dev->archdata.iommu; |
209 | pbm = dev->archdata.host_controller; | |
a2fb23af | 210 | devhandle = pbm->devhandle; |
18397944 DM |
211 | entry = ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT); |
212 | ||
213 | spin_lock_irqsave(&iommu->lock, flags); | |
214 | ||
d284142c | 215 | iommu_range_free(iommu, dvma, npages); |
18397944 DM |
216 | |
217 | do { | |
218 | unsigned long num; | |
219 | ||
220 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
221 | npages); | |
222 | entry += num; | |
223 | npages -= num; | |
224 | } while (npages != 0); | |
225 | ||
226 | spin_unlock_irqrestore(&iommu->lock, flags); | |
227 | ||
228 | order = get_order(size); | |
229 | if (order < 10) | |
230 | free_pages((unsigned long)cpu, order); | |
8f6a93a1 DM |
231 | } |
232 | ||
ad7ad57c DM |
233 | static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz, |
234 | enum dma_data_direction direction) | |
8f6a93a1 | 235 | { |
16ce82d8 | 236 | struct iommu *iommu; |
18397944 | 237 | unsigned long flags, npages, oaddr; |
7c8f486a | 238 | unsigned long i, base_paddr; |
6a32fd4d | 239 | u32 bus_addr, ret; |
18397944 DM |
240 | unsigned long prot; |
241 | long entry; | |
18397944 | 242 | |
ad7ad57c | 243 | iommu = dev->archdata.iommu; |
18397944 | 244 | |
ad7ad57c | 245 | if (unlikely(direction == DMA_NONE)) |
18397944 DM |
246 | goto bad; |
247 | ||
248 | oaddr = (unsigned long)ptr; | |
249 | npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); | |
250 | npages >>= IO_PAGE_SHIFT; | |
18397944 DM |
251 | |
252 | spin_lock_irqsave(&iommu->lock, flags); | |
d284142c | 253 | entry = iommu_range_alloc(dev, iommu, npages, NULL); |
18397944 DM |
254 | spin_unlock_irqrestore(&iommu->lock, flags); |
255 | ||
d284142c | 256 | if (unlikely(entry == DMA_ERROR_CODE)) |
18397944 DM |
257 | goto bad; |
258 | ||
259 | bus_addr = (iommu->page_table_map_base + | |
260 | (entry << IO_PAGE_SHIFT)); | |
261 | ret = bus_addr | (oaddr & ~IO_PAGE_MASK); | |
262 | base_paddr = __pa(oaddr & IO_PAGE_MASK); | |
263 | prot = HV_PCI_MAP_ATTR_READ; | |
ad7ad57c | 264 | if (direction != DMA_TO_DEVICE) |
18397944 DM |
265 | prot |= HV_PCI_MAP_ATTR_WRITE; |
266 | ||
6a32fd4d | 267 | local_irq_save(flags); |
18397944 | 268 | |
ad7ad57c | 269 | iommu_batch_start(dev, prot, entry); |
18397944 | 270 | |
6a32fd4d | 271 | for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE) { |
ad7ad57c | 272 | long err = iommu_batch_add(base_paddr); |
6a32fd4d DM |
273 | if (unlikely(err < 0L)) |
274 | goto iommu_map_fail; | |
275 | } | |
ad7ad57c | 276 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 277 | goto iommu_map_fail; |
18397944 | 278 | |
6a32fd4d | 279 | local_irq_restore(flags); |
18397944 DM |
280 | |
281 | return ret; | |
282 | ||
283 | bad: | |
284 | if (printk_ratelimit()) | |
285 | WARN_ON(1); | |
ad7ad57c | 286 | return DMA_ERROR_CODE; |
6a32fd4d DM |
287 | |
288 | iommu_map_fail: | |
289 | /* Interrupts are disabled. */ | |
290 | spin_lock(&iommu->lock); | |
d284142c | 291 | iommu_range_free(iommu, bus_addr, npages); |
6a32fd4d DM |
292 | spin_unlock_irqrestore(&iommu->lock, flags); |
293 | ||
ad7ad57c | 294 | return DMA_ERROR_CODE; |
8f6a93a1 DM |
295 | } |
296 | ||
ad7ad57c DM |
297 | static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr, |
298 | size_t sz, enum dma_data_direction direction) | |
8f6a93a1 | 299 | { |
a2fb23af | 300 | struct pci_pbm_info *pbm; |
16ce82d8 | 301 | struct iommu *iommu; |
7c8f486a | 302 | unsigned long flags, npages; |
18397944 | 303 | long entry; |
7c8f486a | 304 | u32 devhandle; |
18397944 | 305 | |
ad7ad57c | 306 | if (unlikely(direction == DMA_NONE)) { |
18397944 DM |
307 | if (printk_ratelimit()) |
308 | WARN_ON(1); | |
309 | return; | |
310 | } | |
311 | ||
ad7ad57c DM |
312 | iommu = dev->archdata.iommu; |
313 | pbm = dev->archdata.host_controller; | |
a2fb23af | 314 | devhandle = pbm->devhandle; |
18397944 DM |
315 | |
316 | npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK); | |
317 | npages >>= IO_PAGE_SHIFT; | |
318 | bus_addr &= IO_PAGE_MASK; | |
319 | ||
320 | spin_lock_irqsave(&iommu->lock, flags); | |
321 | ||
d284142c | 322 | iommu_range_free(iommu, bus_addr, npages); |
18397944 | 323 | |
d284142c | 324 | entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT; |
18397944 DM |
325 | do { |
326 | unsigned long num; | |
327 | ||
328 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
329 | npages); | |
330 | entry += num; | |
331 | npages -= num; | |
332 | } while (npages != 0); | |
333 | ||
334 | spin_unlock_irqrestore(&iommu->lock, flags); | |
335 | } | |
336 | ||
ad7ad57c DM |
337 | static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, |
338 | int nelems, enum dma_data_direction direction) | |
8f6a93a1 | 339 | { |
13fa14e1 DM |
340 | struct scatterlist *s, *outs, *segstart; |
341 | unsigned long flags, handle, prot; | |
342 | dma_addr_t dma_next = 0, dma_addr; | |
343 | unsigned int max_seg_size; | |
f0880257 | 344 | unsigned long seg_boundary_size; |
13fa14e1 | 345 | int outcount, incount, i; |
16ce82d8 | 346 | struct iommu *iommu; |
f0880257 | 347 | unsigned long base_shift; |
13fa14e1 DM |
348 | long err; |
349 | ||
350 | BUG_ON(direction == DMA_NONE); | |
18397944 | 351 | |
ad7ad57c | 352 | iommu = dev->archdata.iommu; |
13fa14e1 DM |
353 | if (nelems == 0 || !iommu) |
354 | return 0; | |
18397944 | 355 | |
13fa14e1 DM |
356 | prot = HV_PCI_MAP_ATTR_READ; |
357 | if (direction != DMA_TO_DEVICE) | |
358 | prot |= HV_PCI_MAP_ATTR_WRITE; | |
18397944 | 359 | |
13fa14e1 DM |
360 | outs = s = segstart = &sglist[0]; |
361 | outcount = 1; | |
362 | incount = nelems; | |
363 | handle = 0; | |
18397944 | 364 | |
13fa14e1 DM |
365 | /* Init first segment length for backout at failure */ |
366 | outs->dma_length = 0; | |
18397944 | 367 | |
13fa14e1 | 368 | spin_lock_irqsave(&iommu->lock, flags); |
18397944 | 369 | |
13fa14e1 | 370 | iommu_batch_start(dev, prot, ~0UL); |
18397944 | 371 | |
13fa14e1 | 372 | max_seg_size = dma_get_max_seg_size(dev); |
f0880257 FT |
373 | seg_boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
374 | IO_PAGE_SIZE) >> IO_PAGE_SHIFT; | |
375 | base_shift = iommu->page_table_map_base >> IO_PAGE_SHIFT; | |
13fa14e1 | 376 | for_each_sg(sglist, s, nelems, i) { |
f0880257 | 377 | unsigned long paddr, npages, entry, out_entry = 0, slen; |
38192d52 | 378 | |
13fa14e1 DM |
379 | slen = s->length; |
380 | /* Sanity check */ | |
381 | if (slen == 0) { | |
382 | dma_next = 0; | |
383 | continue; | |
384 | } | |
385 | /* Allocate iommu entries for that segment */ | |
386 | paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s); | |
a7375762 | 387 | npages = iommu_nr_pages(paddr, slen); |
13fa14e1 | 388 | entry = iommu_range_alloc(dev, iommu, npages, &handle); |
38192d52 | 389 | |
13fa14e1 DM |
390 | /* Handle failure */ |
391 | if (unlikely(entry == DMA_ERROR_CODE)) { | |
392 | if (printk_ratelimit()) | |
393 | printk(KERN_INFO "iommu_alloc failed, iommu %p paddr %lx" | |
394 | " npages %lx\n", iommu, paddr, npages); | |
395 | goto iommu_map_failed; | |
396 | } | |
38192d52 | 397 | |
13fa14e1 | 398 | iommu_batch_new_entry(entry); |
38192d52 | 399 | |
13fa14e1 DM |
400 | /* Convert entry to a dma_addr_t */ |
401 | dma_addr = iommu->page_table_map_base + | |
402 | (entry << IO_PAGE_SHIFT); | |
403 | dma_addr |= (s->offset & ~IO_PAGE_MASK); | |
38192d52 | 404 | |
13fa14e1 | 405 | /* Insert into HW table */ |
38192d52 | 406 | paddr &= IO_PAGE_MASK; |
13fa14e1 | 407 | while (npages--) { |
38192d52 | 408 | err = iommu_batch_add(paddr); |
13fa14e1 | 409 | if (unlikely(err < 0L)) |
38192d52 | 410 | goto iommu_map_failed; |
13fa14e1 DM |
411 | paddr += IO_PAGE_SIZE; |
412 | } | |
413 | ||
414 | /* If we are in an open segment, try merging */ | |
415 | if (segstart != s) { | |
416 | /* We cannot merge if: | |
417 | * - allocated dma_addr isn't contiguous to previous allocation | |
418 | */ | |
419 | if ((dma_addr != dma_next) || | |
f0880257 FT |
420 | (outs->dma_length + s->length > max_seg_size) || |
421 | (is_span_boundary(out_entry, base_shift, | |
422 | seg_boundary_size, outs, s))) { | |
13fa14e1 DM |
423 | /* Can't merge: create a new segment */ |
424 | segstart = s; | |
425 | outcount++; | |
426 | outs = sg_next(outs); | |
427 | } else { | |
428 | outs->dma_length += s->length; | |
38192d52 | 429 | } |
13fa14e1 | 430 | } |
38192d52 | 431 | |
13fa14e1 DM |
432 | if (segstart == s) { |
433 | /* This is a new segment, fill entries */ | |
434 | outs->dma_address = dma_addr; | |
435 | outs->dma_length = slen; | |
f0880257 | 436 | out_entry = entry; |
38192d52 | 437 | } |
13fa14e1 DM |
438 | |
439 | /* Calculate next page pointer for contiguous check */ | |
440 | dma_next = dma_addr + slen; | |
38192d52 DM |
441 | } |
442 | ||
443 | err = iommu_batch_end(); | |
444 | ||
6a32fd4d DM |
445 | if (unlikely(err < 0L)) |
446 | goto iommu_map_failed; | |
18397944 | 447 | |
13fa14e1 | 448 | spin_unlock_irqrestore(&iommu->lock, flags); |
18397944 | 449 | |
13fa14e1 DM |
450 | if (outcount < incount) { |
451 | outs = sg_next(outs); | |
452 | outs->dma_address = DMA_ERROR_CODE; | |
453 | outs->dma_length = 0; | |
454 | } | |
455 | ||
456 | return outcount; | |
6a32fd4d DM |
457 | |
458 | iommu_map_failed: | |
13fa14e1 DM |
459 | for_each_sg(sglist, s, nelems, i) { |
460 | if (s->dma_length != 0) { | |
461 | unsigned long vaddr, npages; | |
462 | ||
463 | vaddr = s->dma_address & IO_PAGE_MASK; | |
a7375762 | 464 | npages = iommu_nr_pages(s->dma_address, s->dma_length); |
13fa14e1 DM |
465 | iommu_range_free(iommu, vaddr, npages); |
466 | /* XXX demap? XXX */ | |
467 | s->dma_address = DMA_ERROR_CODE; | |
468 | s->dma_length = 0; | |
469 | } | |
470 | if (s == outs) | |
471 | break; | |
472 | } | |
6a32fd4d DM |
473 | spin_unlock_irqrestore(&iommu->lock, flags); |
474 | ||
475 | return 0; | |
8f6a93a1 DM |
476 | } |
477 | ||
ad7ad57c DM |
478 | static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, |
479 | int nelems, enum dma_data_direction direction) | |
8f6a93a1 | 480 | { |
a2fb23af | 481 | struct pci_pbm_info *pbm; |
13fa14e1 | 482 | struct scatterlist *sg; |
16ce82d8 | 483 | struct iommu *iommu; |
13fa14e1 DM |
484 | unsigned long flags; |
485 | u32 devhandle; | |
18397944 | 486 | |
13fa14e1 | 487 | BUG_ON(direction == DMA_NONE); |
18397944 | 488 | |
ad7ad57c DM |
489 | iommu = dev->archdata.iommu; |
490 | pbm = dev->archdata.host_controller; | |
a2fb23af | 491 | devhandle = pbm->devhandle; |
18397944 | 492 | |
18397944 DM |
493 | spin_lock_irqsave(&iommu->lock, flags); |
494 | ||
13fa14e1 DM |
495 | sg = sglist; |
496 | while (nelems--) { | |
497 | dma_addr_t dma_handle = sg->dma_address; | |
498 | unsigned int len = sg->dma_length; | |
499 | unsigned long npages, entry; | |
500 | ||
501 | if (!len) | |
502 | break; | |
a7375762 | 503 | npages = iommu_nr_pages(dma_handle, len); |
13fa14e1 DM |
504 | iommu_range_free(iommu, dma_handle, npages); |
505 | ||
506 | entry = ((dma_handle - iommu->page_table_map_base) >> IO_PAGE_SHIFT); | |
507 | while (npages) { | |
508 | unsigned long num; | |
509 | ||
510 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
511 | npages); | |
512 | entry += num; | |
513 | npages -= num; | |
514 | } | |
18397944 | 515 | |
13fa14e1 DM |
516 | sg = sg_next(sg); |
517 | } | |
18397944 DM |
518 | |
519 | spin_unlock_irqrestore(&iommu->lock, flags); | |
8f6a93a1 DM |
520 | } |
521 | ||
ad7ad57c DM |
522 | static void dma_4v_sync_single_for_cpu(struct device *dev, |
523 | dma_addr_t bus_addr, size_t sz, | |
524 | enum dma_data_direction direction) | |
8f6a93a1 | 525 | { |
18397944 | 526 | /* Nothing to do... */ |
8f6a93a1 DM |
527 | } |
528 | ||
ad7ad57c DM |
529 | static void dma_4v_sync_sg_for_cpu(struct device *dev, |
530 | struct scatterlist *sglist, int nelems, | |
531 | enum dma_data_direction direction) | |
8f6a93a1 | 532 | { |
18397944 | 533 | /* Nothing to do... */ |
8f6a93a1 DM |
534 | } |
535 | ||
908f5162 | 536 | static const struct dma_ops sun4v_dma_ops = { |
ad7ad57c DM |
537 | .alloc_coherent = dma_4v_alloc_coherent, |
538 | .free_coherent = dma_4v_free_coherent, | |
539 | .map_single = dma_4v_map_single, | |
540 | .unmap_single = dma_4v_unmap_single, | |
541 | .map_sg = dma_4v_map_sg, | |
542 | .unmap_sg = dma_4v_unmap_sg, | |
543 | .sync_single_for_cpu = dma_4v_sync_single_for_cpu, | |
544 | .sync_sg_for_cpu = dma_4v_sync_sg_for_cpu, | |
8f6a93a1 DM |
545 | }; |
546 | ||
e822358a DM |
547 | static void __init pci_sun4v_scan_bus(struct pci_pbm_info *pbm, |
548 | struct device *parent) | |
bade5622 | 549 | { |
e87dc350 DM |
550 | struct property *prop; |
551 | struct device_node *dp; | |
552 | ||
22fecbae | 553 | dp = pbm->op->node; |
34768bc8 DM |
554 | prop = of_find_property(dp, "66mhz-capable", NULL); |
555 | pbm->is_66mhz_capable = (prop != NULL); | |
e822358a | 556 | pbm->pci_bus = pci_scan_one_pbm(pbm, parent); |
c2609267 DM |
557 | |
558 | /* XXX register error interrupt handlers XXX */ | |
bade5622 DM |
559 | } |
560 | ||
4c622258 AB |
561 | static unsigned long __init probe_existing_entries(struct pci_pbm_info *pbm, |
562 | struct iommu *iommu) | |
18397944 | 563 | { |
9b3627f3 | 564 | struct iommu_arena *arena = &iommu->arena; |
e7a0453e | 565 | unsigned long i, cnt = 0; |
7c8f486a | 566 | u32 devhandle; |
18397944 DM |
567 | |
568 | devhandle = pbm->devhandle; | |
569 | for (i = 0; i < arena->limit; i++) { | |
570 | unsigned long ret, io_attrs, ra; | |
571 | ||
572 | ret = pci_sun4v_iommu_getmap(devhandle, | |
573 | HV_PCI_TSBID(0, i), | |
574 | &io_attrs, &ra); | |
e7a0453e | 575 | if (ret == HV_EOK) { |
c2a5a46b DM |
576 | if (page_in_phys_avail(ra)) { |
577 | pci_sun4v_iommu_demap(devhandle, | |
578 | HV_PCI_TSBID(0, i), 1); | |
579 | } else { | |
580 | cnt++; | |
581 | __set_bit(i, arena->map); | |
582 | } | |
e7a0453e | 583 | } |
18397944 | 584 | } |
e7a0453e DM |
585 | |
586 | return cnt; | |
18397944 DM |
587 | } |
588 | ||
3822b509 | 589 | static int __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm) |
bade5622 | 590 | { |
8aef7278 | 591 | static const u32 vdma_default[] = { 0x80000000, 0x80000000 }; |
16ce82d8 | 592 | struct iommu *iommu = pbm->iommu; |
59db8102 | 593 | unsigned long num_tsb_entries, sz, tsbsize; |
8aef7278 DM |
594 | u32 dma_mask, dma_offset; |
595 | const u32 *vdma; | |
596 | ||
22fecbae | 597 | vdma = of_get_property(pbm->op->node, "virtual-dma", NULL); |
8aef7278 DM |
598 | if (!vdma) |
599 | vdma = vdma_default; | |
18397944 | 600 | |
59db8102 | 601 | if ((vdma[0] | vdma[1]) & ~IO_PAGE_MASK) { |
3822b509 DM |
602 | printk(KERN_ERR PFX "Strange virtual-dma[%08x:%08x].\n", |
603 | vdma[0], vdma[1]); | |
604 | return -EINVAL; | |
18397944 DM |
605 | }; |
606 | ||
59db8102 DM |
607 | dma_mask = (roundup_pow_of_two(vdma[1]) - 1UL); |
608 | num_tsb_entries = vdma[1] / IO_PAGE_SIZE; | |
609 | tsbsize = num_tsb_entries * sizeof(iopte_t); | |
18397944 DM |
610 | |
611 | dma_offset = vdma[0]; | |
612 | ||
613 | /* Setup initial software IOMMU state. */ | |
614 | spin_lock_init(&iommu->lock); | |
615 | iommu->ctx_lowest_free = 1; | |
616 | iommu->page_table_map_base = dma_offset; | |
617 | iommu->dma_addr_mask = dma_mask; | |
618 | ||
619 | /* Allocate and initialize the free area map. */ | |
59db8102 | 620 | sz = (num_tsb_entries + 7) / 8; |
18397944 | 621 | sz = (sz + 7UL) & ~7UL; |
982c2064 | 622 | iommu->arena.map = kzalloc(sz, GFP_KERNEL); |
18397944 | 623 | if (!iommu->arena.map) { |
3822b509 DM |
624 | printk(KERN_ERR PFX "Error, kmalloc(arena.map) failed.\n"); |
625 | return -ENOMEM; | |
18397944 | 626 | } |
18397944 DM |
627 | iommu->arena.limit = num_tsb_entries; |
628 | ||
e7a0453e | 629 | sz = probe_existing_entries(pbm, iommu); |
c2a5a46b DM |
630 | if (sz) |
631 | printk("%s: Imported %lu TSB entries from OBP\n", | |
632 | pbm->name, sz); | |
3822b509 DM |
633 | |
634 | return 0; | |
bade5622 DM |
635 | } |
636 | ||
35a17eb6 DM |
637 | #ifdef CONFIG_PCI_MSI |
638 | struct pci_sun4v_msiq_entry { | |
639 | u64 version_type; | |
640 | #define MSIQ_VERSION_MASK 0xffffffff00000000UL | |
641 | #define MSIQ_VERSION_SHIFT 32 | |
642 | #define MSIQ_TYPE_MASK 0x00000000000000ffUL | |
643 | #define MSIQ_TYPE_SHIFT 0 | |
644 | #define MSIQ_TYPE_NONE 0x00 | |
645 | #define MSIQ_TYPE_MSG 0x01 | |
646 | #define MSIQ_TYPE_MSI32 0x02 | |
647 | #define MSIQ_TYPE_MSI64 0x03 | |
648 | #define MSIQ_TYPE_INTX 0x08 | |
649 | #define MSIQ_TYPE_NONE2 0xff | |
650 | ||
651 | u64 intx_sysino; | |
652 | u64 reserved1; | |
653 | u64 stick; | |
654 | u64 req_id; /* bus/device/func */ | |
655 | #define MSIQ_REQID_BUS_MASK 0xff00UL | |
656 | #define MSIQ_REQID_BUS_SHIFT 8 | |
657 | #define MSIQ_REQID_DEVICE_MASK 0x00f8UL | |
658 | #define MSIQ_REQID_DEVICE_SHIFT 3 | |
659 | #define MSIQ_REQID_FUNC_MASK 0x0007UL | |
660 | #define MSIQ_REQID_FUNC_SHIFT 0 | |
661 | ||
662 | u64 msi_address; | |
663 | ||
e5dd42e4 | 664 | /* The format of this value is message type dependent. |
35a17eb6 DM |
665 | * For MSI bits 15:0 are the data from the MSI packet. |
666 | * For MSI-X bits 31:0 are the data from the MSI packet. | |
667 | * For MSG, the message code and message routing code where: | |
668 | * bits 39:32 is the bus/device/fn of the msg target-id | |
669 | * bits 18:16 is the message routing code | |
670 | * bits 7:0 is the message code | |
671 | * For INTx the low order 2-bits are: | |
672 | * 00 - INTA | |
673 | * 01 - INTB | |
674 | * 10 - INTC | |
675 | * 11 - INTD | |
676 | */ | |
677 | u64 msi_data; | |
678 | ||
679 | u64 reserved2; | |
680 | }; | |
681 | ||
759f89e0 DM |
682 | static int pci_sun4v_get_head(struct pci_pbm_info *pbm, unsigned long msiqid, |
683 | unsigned long *head) | |
35a17eb6 | 684 | { |
759f89e0 | 685 | unsigned long err, limit; |
35a17eb6 | 686 | |
759f89e0 | 687 | err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, head); |
35a17eb6 | 688 | if (unlikely(err)) |
759f89e0 | 689 | return -ENXIO; |
35a17eb6 | 690 | |
759f89e0 DM |
691 | limit = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); |
692 | if (unlikely(*head >= limit)) | |
693 | return -EFBIG; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | static int pci_sun4v_dequeue_msi(struct pci_pbm_info *pbm, | |
699 | unsigned long msiqid, unsigned long *head, | |
700 | unsigned long *msi) | |
701 | { | |
702 | struct pci_sun4v_msiq_entry *ep; | |
703 | unsigned long err, type; | |
704 | ||
705 | /* Note: void pointer arithmetic, 'head' is a byte offset */ | |
706 | ep = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * | |
707 | (pbm->msiq_ent_count * | |
708 | sizeof(struct pci_sun4v_msiq_entry))) + | |
709 | *head); | |
710 | ||
711 | if ((ep->version_type & MSIQ_TYPE_MASK) == 0) | |
712 | return 0; | |
35a17eb6 | 713 | |
759f89e0 DM |
714 | type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; |
715 | if (unlikely(type != MSIQ_TYPE_MSI32 && | |
716 | type != MSIQ_TYPE_MSI64)) | |
717 | return -EINVAL; | |
35a17eb6 | 718 | |
759f89e0 DM |
719 | *msi = ep->msi_data; |
720 | ||
721 | err = pci_sun4v_msi_setstate(pbm->devhandle, | |
722 | ep->msi_data /* msi_num */, | |
723 | HV_MSISTATE_IDLE); | |
724 | if (unlikely(err)) | |
725 | return -ENXIO; | |
35a17eb6 | 726 | |
759f89e0 DM |
727 | /* Clear the entry. */ |
728 | ep->version_type &= ~MSIQ_TYPE_MASK; | |
35a17eb6 | 729 | |
759f89e0 DM |
730 | (*head) += sizeof(struct pci_sun4v_msiq_entry); |
731 | if (*head >= | |
732 | (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry))) | |
733 | *head = 0; | |
35a17eb6 | 734 | |
759f89e0 | 735 | return 1; |
35a17eb6 DM |
736 | } |
737 | ||
759f89e0 DM |
738 | static int pci_sun4v_set_head(struct pci_pbm_info *pbm, unsigned long msiqid, |
739 | unsigned long head) | |
35a17eb6 | 740 | { |
759f89e0 | 741 | unsigned long err; |
35a17eb6 | 742 | |
759f89e0 DM |
743 | err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); |
744 | if (unlikely(err)) | |
745 | return -EINVAL; | |
35a17eb6 | 746 | |
759f89e0 DM |
747 | return 0; |
748 | } | |
35a17eb6 | 749 | |
759f89e0 DM |
750 | static int pci_sun4v_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid, |
751 | unsigned long msi, int is_msi64) | |
752 | { | |
753 | if (pci_sun4v_msi_setmsiq(pbm->devhandle, msi, msiqid, | |
754 | (is_msi64 ? | |
755 | HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) | |
756 | return -ENXIO; | |
757 | if (pci_sun4v_msi_setstate(pbm->devhandle, msi, HV_MSISTATE_IDLE)) | |
758 | return -ENXIO; | |
759 | if (pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_VALID)) | |
760 | return -ENXIO; | |
35a17eb6 DM |
761 | return 0; |
762 | } | |
763 | ||
759f89e0 | 764 | static int pci_sun4v_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi) |
35a17eb6 | 765 | { |
759f89e0 DM |
766 | unsigned long err, msiqid; |
767 | ||
768 | err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi, &msiqid); | |
769 | if (err) | |
770 | return -ENXIO; | |
771 | ||
772 | pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_INVALID); | |
773 | ||
774 | return 0; | |
35a17eb6 DM |
775 | } |
776 | ||
759f89e0 | 777 | static int pci_sun4v_msiq_alloc(struct pci_pbm_info *pbm) |
35a17eb6 DM |
778 | { |
779 | unsigned long q_size, alloc_size, pages, order; | |
780 | int i; | |
781 | ||
782 | q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); | |
783 | alloc_size = (pbm->msiq_num * q_size); | |
784 | order = get_order(alloc_size); | |
785 | pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order); | |
786 | if (pages == 0UL) { | |
787 | printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n", | |
788 | order); | |
789 | return -ENOMEM; | |
790 | } | |
791 | memset((char *)pages, 0, PAGE_SIZE << order); | |
792 | pbm->msi_queues = (void *) pages; | |
793 | ||
794 | for (i = 0; i < pbm->msiq_num; i++) { | |
795 | unsigned long err, base = __pa(pages + (i * q_size)); | |
796 | unsigned long ret1, ret2; | |
797 | ||
798 | err = pci_sun4v_msiq_conf(pbm->devhandle, | |
799 | pbm->msiq_first + i, | |
800 | base, pbm->msiq_ent_count); | |
801 | if (err) { | |
802 | printk(KERN_ERR "MSI: msiq register fails (err=%lu)\n", | |
803 | err); | |
804 | goto h_error; | |
805 | } | |
806 | ||
807 | err = pci_sun4v_msiq_info(pbm->devhandle, | |
808 | pbm->msiq_first + i, | |
809 | &ret1, &ret2); | |
810 | if (err) { | |
811 | printk(KERN_ERR "MSI: Cannot read msiq (err=%lu)\n", | |
812 | err); | |
813 | goto h_error; | |
814 | } | |
815 | if (ret1 != base || ret2 != pbm->msiq_ent_count) { | |
816 | printk(KERN_ERR "MSI: Bogus qconf " | |
817 | "expected[%lx:%x] got[%lx:%lx]\n", | |
818 | base, pbm->msiq_ent_count, | |
819 | ret1, ret2); | |
820 | goto h_error; | |
821 | } | |
822 | } | |
823 | ||
824 | return 0; | |
825 | ||
826 | h_error: | |
827 | free_pages(pages, order); | |
828 | return -EINVAL; | |
829 | } | |
830 | ||
759f89e0 | 831 | static void pci_sun4v_msiq_free(struct pci_pbm_info *pbm) |
35a17eb6 | 832 | { |
759f89e0 | 833 | unsigned long q_size, alloc_size, pages, order; |
35a17eb6 DM |
834 | int i; |
835 | ||
759f89e0 DM |
836 | for (i = 0; i < pbm->msiq_num; i++) { |
837 | unsigned long msiqid = pbm->msiq_first + i; | |
35a17eb6 | 838 | |
759f89e0 | 839 | (void) pci_sun4v_msiq_conf(pbm->devhandle, msiqid, 0UL, 0); |
35a17eb6 | 840 | } |
7fe3730d | 841 | |
759f89e0 DM |
842 | q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); |
843 | alloc_size = (pbm->msiq_num * q_size); | |
844 | order = get_order(alloc_size); | |
35a17eb6 | 845 | |
759f89e0 | 846 | pages = (unsigned long) pbm->msi_queues; |
35a17eb6 | 847 | |
759f89e0 | 848 | free_pages(pages, order); |
35a17eb6 | 849 | |
759f89e0 | 850 | pbm->msi_queues = NULL; |
35a17eb6 DM |
851 | } |
852 | ||
759f89e0 DM |
853 | static int pci_sun4v_msiq_build_irq(struct pci_pbm_info *pbm, |
854 | unsigned long msiqid, | |
855 | unsigned long devino) | |
35a17eb6 | 856 | { |
759f89e0 | 857 | unsigned int virt_irq = sun4v_build_irq(pbm->devhandle, devino); |
35a17eb6 | 858 | |
759f89e0 DM |
859 | if (!virt_irq) |
860 | return -ENOMEM; | |
35a17eb6 | 861 | |
759f89e0 DM |
862 | if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) |
863 | return -EINVAL; | |
864 | if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) | |
865 | return -EINVAL; | |
35a17eb6 | 866 | |
759f89e0 | 867 | return virt_irq; |
35a17eb6 | 868 | } |
e9870c4c | 869 | |
759f89e0 DM |
870 | static const struct sparc64_msiq_ops pci_sun4v_msiq_ops = { |
871 | .get_head = pci_sun4v_get_head, | |
872 | .dequeue_msi = pci_sun4v_dequeue_msi, | |
873 | .set_head = pci_sun4v_set_head, | |
874 | .msi_setup = pci_sun4v_msi_setup, | |
875 | .msi_teardown = pci_sun4v_msi_teardown, | |
876 | .msiq_alloc = pci_sun4v_msiq_alloc, | |
877 | .msiq_free = pci_sun4v_msiq_free, | |
878 | .msiq_build_irq = pci_sun4v_msiq_build_irq, | |
879 | }; | |
880 | ||
e9870c4c DM |
881 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) |
882 | { | |
759f89e0 | 883 | sparc64_pbm_msi_init(pbm, &pci_sun4v_msiq_ops); |
e9870c4c | 884 | } |
35a17eb6 DM |
885 | #else /* CONFIG_PCI_MSI */ |
886 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) | |
887 | { | |
888 | } | |
889 | #endif /* !(CONFIG_PCI_MSI) */ | |
890 | ||
d3ae4b5b | 891 | static int __init pci_sun4v_pbm_init(struct pci_pbm_info *pbm, |
e822358a | 892 | struct of_device *op, u32 devhandle) |
bade5622 | 893 | { |
e822358a | 894 | struct device_node *dp = op->node; |
3822b509 | 895 | int err; |
bade5622 | 896 | |
c1b1a5f1 DM |
897 | pbm->numa_node = of_node_to_nid(dp); |
898 | ||
ca3dd88e DM |
899 | pbm->pci_ops = &sun4v_pci_ops; |
900 | pbm->config_space_reg_bits = 12; | |
34768bc8 | 901 | |
6c108f12 DM |
902 | pbm->index = pci_num_pbms++; |
903 | ||
22fecbae | 904 | pbm->op = op; |
bade5622 | 905 | |
3833789b | 906 | pbm->devhandle = devhandle; |
bade5622 | 907 | |
e87dc350 | 908 | pbm->name = dp->full_name; |
bade5622 | 909 | |
e87dc350 | 910 | printk("%s: SUN4V PCI Bus Module\n", pbm->name); |
c1b1a5f1 | 911 | printk("%s: On NUMA node %d\n", pbm->name, pbm->numa_node); |
bade5622 | 912 | |
9fd8b647 | 913 | pci_determine_mem_io_space(pbm); |
bade5622 | 914 | |
cfa0652c | 915 | pci_get_pbm_props(pbm); |
3822b509 DM |
916 | |
917 | err = pci_sun4v_iommu_init(pbm); | |
918 | if (err) | |
919 | return err; | |
920 | ||
35a17eb6 | 921 | pci_sun4v_msi_init(pbm); |
3822b509 | 922 | |
e822358a | 923 | pci_sun4v_scan_bus(pbm, &op->dev); |
3822b509 | 924 | |
d3ae4b5b DM |
925 | pbm->next = pci_pbm_root; |
926 | pci_pbm_root = pbm; | |
927 | ||
3822b509 | 928 | return 0; |
bade5622 DM |
929 | } |
930 | ||
3822b509 DM |
931 | static int __devinit pci_sun4v_probe(struct of_device *op, |
932 | const struct of_device_id *match) | |
8f6a93a1 | 933 | { |
3822b509 | 934 | const struct linux_prom64_registers *regs; |
e01c0d6d | 935 | static int hvapi_negotiated = 0; |
34768bc8 | 936 | struct pci_pbm_info *pbm; |
3822b509 | 937 | struct device_node *dp; |
16ce82d8 | 938 | struct iommu *iommu; |
7c8f486a | 939 | u32 devhandle; |
d7472c38 | 940 | int i, err; |
3833789b | 941 | |
3822b509 DM |
942 | dp = op->node; |
943 | ||
e01c0d6d | 944 | if (!hvapi_negotiated++) { |
8d2aec51 DM |
945 | err = sun4v_hvapi_register(HV_GRP_PCI, |
946 | vpci_major, | |
947 | &vpci_minor); | |
e01c0d6d DM |
948 | |
949 | if (err) { | |
3822b509 DM |
950 | printk(KERN_ERR PFX "Could not register hvapi, " |
951 | "err=%d\n", err); | |
952 | return err; | |
e01c0d6d | 953 | } |
3822b509 | 954 | printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n", |
e01c0d6d | 955 | vpci_major, vpci_minor); |
ad7ad57c DM |
956 | |
957 | dma_ops = &sun4v_dma_ops; | |
e01c0d6d DM |
958 | } |
959 | ||
3822b509 | 960 | regs = of_get_property(dp, "reg", NULL); |
d7472c38 | 961 | err = -ENODEV; |
3822b509 DM |
962 | if (!regs) { |
963 | printk(KERN_ERR PFX "Could not find config registers\n"); | |
d7472c38 | 964 | goto out_err; |
75c6d141 | 965 | } |
e87dc350 | 966 | devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff; |
3833789b | 967 | |
d7472c38 | 968 | err = -ENOMEM; |
d3ae4b5b DM |
969 | if (!iommu_batch_initialized) { |
970 | for_each_possible_cpu(i) { | |
971 | unsigned long page = get_zeroed_page(GFP_KERNEL); | |
7c8f486a | 972 | |
d3ae4b5b DM |
973 | if (!page) |
974 | goto out_err; | |
7c8f486a | 975 | |
d3ae4b5b DM |
976 | per_cpu(iommu_batch, i).pglist = (u64 *) page; |
977 | } | |
978 | iommu_batch_initialized = 1; | |
bade5622 | 979 | } |
7c8f486a | 980 | |
d3ae4b5b DM |
981 | pbm = kzalloc(sizeof(*pbm), GFP_KERNEL); |
982 | if (!pbm) { | |
983 | printk(KERN_ERR PFX "Could not allocate pci_pbm_info\n"); | |
d7472c38 | 984 | goto out_err; |
3822b509 | 985 | } |
7c8f486a | 986 | |
d3ae4b5b | 987 | iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL); |
3822b509 | 988 | if (!iommu) { |
d3ae4b5b | 989 | printk(KERN_ERR PFX "Could not allocate pbm iommu\n"); |
d7472c38 | 990 | goto out_free_controller; |
3822b509 | 991 | } |
7c8f486a | 992 | |
d3ae4b5b | 993 | pbm->iommu = iommu; |
bade5622 | 994 | |
d3ae4b5b DM |
995 | err = pci_sun4v_pbm_init(pbm, op, devhandle); |
996 | if (err) | |
997 | goto out_free_iommu; | |
7c8f486a | 998 | |
d3ae4b5b | 999 | dev_set_drvdata(&op->dev, pbm); |
bade5622 | 1000 | |
d3ae4b5b | 1001 | return 0; |
7c8f486a | 1002 | |
d3ae4b5b DM |
1003 | out_free_iommu: |
1004 | kfree(pbm->iommu); | |
d7472c38 DM |
1005 | |
1006 | out_free_controller: | |
d3ae4b5b | 1007 | kfree(pbm); |
d7472c38 DM |
1008 | |
1009 | out_err: | |
1010 | return err; | |
8f6a93a1 | 1011 | } |
3822b509 | 1012 | |
fd098316 | 1013 | static struct of_device_id __initdata pci_sun4v_match[] = { |
3822b509 DM |
1014 | { |
1015 | .name = "pci", | |
1016 | .compatible = "SUNW,sun4v-pci", | |
1017 | }, | |
1018 | {}, | |
1019 | }; | |
1020 | ||
1021 | static struct of_platform_driver pci_sun4v_driver = { | |
1022 | .name = DRIVER_NAME, | |
1023 | .match_table = pci_sun4v_match, | |
1024 | .probe = pci_sun4v_probe, | |
1025 | }; | |
1026 | ||
1027 | static int __init pci_sun4v_init(void) | |
1028 | { | |
1029 | return of_register_driver(&pci_sun4v_driver, &of_bus_type); | |
1030 | } | |
1031 | ||
1032 | subsys_initcall(pci_sun4v_init); |