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 " |
90181136 | 76 | "[%08lx:%08llx:%lx:%lx:%lx] failed with " |
6a32fd4d DM |
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 | ||
797a7568 FT |
233 | static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, |
234 | unsigned long offset, size_t sz, | |
bc0a14f1 FT |
235 | enum dma_data_direction direction, |
236 | struct dma_attrs *attrs) | |
8f6a93a1 | 237 | { |
16ce82d8 | 238 | struct iommu *iommu; |
18397944 | 239 | unsigned long flags, npages, oaddr; |
7c8f486a | 240 | unsigned long i, base_paddr; |
6a32fd4d | 241 | u32 bus_addr, ret; |
18397944 DM |
242 | unsigned long prot; |
243 | long entry; | |
18397944 | 244 | |
ad7ad57c | 245 | iommu = dev->archdata.iommu; |
18397944 | 246 | |
ad7ad57c | 247 | if (unlikely(direction == DMA_NONE)) |
18397944 DM |
248 | goto bad; |
249 | ||
797a7568 | 250 | oaddr = (unsigned long)(page_address(page) + offset); |
18397944 DM |
251 | npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); |
252 | npages >>= IO_PAGE_SHIFT; | |
18397944 DM |
253 | |
254 | spin_lock_irqsave(&iommu->lock, flags); | |
d284142c | 255 | entry = iommu_range_alloc(dev, iommu, npages, NULL); |
18397944 DM |
256 | spin_unlock_irqrestore(&iommu->lock, flags); |
257 | ||
d284142c | 258 | if (unlikely(entry == DMA_ERROR_CODE)) |
18397944 DM |
259 | goto bad; |
260 | ||
261 | bus_addr = (iommu->page_table_map_base + | |
262 | (entry << IO_PAGE_SHIFT)); | |
263 | ret = bus_addr | (oaddr & ~IO_PAGE_MASK); | |
264 | base_paddr = __pa(oaddr & IO_PAGE_MASK); | |
265 | prot = HV_PCI_MAP_ATTR_READ; | |
ad7ad57c | 266 | if (direction != DMA_TO_DEVICE) |
18397944 DM |
267 | prot |= HV_PCI_MAP_ATTR_WRITE; |
268 | ||
6a32fd4d | 269 | local_irq_save(flags); |
18397944 | 270 | |
ad7ad57c | 271 | iommu_batch_start(dev, prot, entry); |
18397944 | 272 | |
6a32fd4d | 273 | for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE) { |
ad7ad57c | 274 | long err = iommu_batch_add(base_paddr); |
6a32fd4d DM |
275 | if (unlikely(err < 0L)) |
276 | goto iommu_map_fail; | |
277 | } | |
ad7ad57c | 278 | if (unlikely(iommu_batch_end() < 0L)) |
6a32fd4d | 279 | goto iommu_map_fail; |
18397944 | 280 | |
6a32fd4d | 281 | local_irq_restore(flags); |
18397944 DM |
282 | |
283 | return ret; | |
284 | ||
285 | bad: | |
286 | if (printk_ratelimit()) | |
287 | WARN_ON(1); | |
ad7ad57c | 288 | return DMA_ERROR_CODE; |
6a32fd4d DM |
289 | |
290 | iommu_map_fail: | |
291 | /* Interrupts are disabled. */ | |
292 | spin_lock(&iommu->lock); | |
d284142c | 293 | iommu_range_free(iommu, bus_addr, npages); |
6a32fd4d DM |
294 | spin_unlock_irqrestore(&iommu->lock, flags); |
295 | ||
ad7ad57c | 296 | return DMA_ERROR_CODE; |
8f6a93a1 DM |
297 | } |
298 | ||
797a7568 | 299 | static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, |
bc0a14f1 FT |
300 | size_t sz, enum dma_data_direction direction, |
301 | struct dma_attrs *attrs) | |
8f6a93a1 | 302 | { |
a2fb23af | 303 | struct pci_pbm_info *pbm; |
16ce82d8 | 304 | struct iommu *iommu; |
7c8f486a | 305 | unsigned long flags, npages; |
18397944 | 306 | long entry; |
7c8f486a | 307 | u32 devhandle; |
18397944 | 308 | |
ad7ad57c | 309 | if (unlikely(direction == DMA_NONE)) { |
18397944 DM |
310 | if (printk_ratelimit()) |
311 | WARN_ON(1); | |
312 | return; | |
313 | } | |
314 | ||
ad7ad57c DM |
315 | iommu = dev->archdata.iommu; |
316 | pbm = dev->archdata.host_controller; | |
a2fb23af | 317 | devhandle = pbm->devhandle; |
18397944 DM |
318 | |
319 | npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK); | |
320 | npages >>= IO_PAGE_SHIFT; | |
321 | bus_addr &= IO_PAGE_MASK; | |
322 | ||
323 | spin_lock_irqsave(&iommu->lock, flags); | |
324 | ||
d284142c | 325 | iommu_range_free(iommu, bus_addr, npages); |
18397944 | 326 | |
d284142c | 327 | entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT; |
18397944 DM |
328 | do { |
329 | unsigned long num; | |
330 | ||
331 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
332 | npages); | |
333 | entry += num; | |
334 | npages -= num; | |
335 | } while (npages != 0); | |
336 | ||
337 | spin_unlock_irqrestore(&iommu->lock, flags); | |
338 | } | |
339 | ||
ad7ad57c | 340 | static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, |
bc0a14f1 FT |
341 | int nelems, enum dma_data_direction direction, |
342 | struct dma_attrs *attrs) | |
8f6a93a1 | 343 | { |
13fa14e1 DM |
344 | struct scatterlist *s, *outs, *segstart; |
345 | unsigned long flags, handle, prot; | |
346 | dma_addr_t dma_next = 0, dma_addr; | |
347 | unsigned int max_seg_size; | |
f0880257 | 348 | unsigned long seg_boundary_size; |
13fa14e1 | 349 | int outcount, incount, i; |
16ce82d8 | 350 | struct iommu *iommu; |
f0880257 | 351 | unsigned long base_shift; |
13fa14e1 DM |
352 | long err; |
353 | ||
354 | BUG_ON(direction == DMA_NONE); | |
18397944 | 355 | |
ad7ad57c | 356 | iommu = dev->archdata.iommu; |
13fa14e1 DM |
357 | if (nelems == 0 || !iommu) |
358 | return 0; | |
18397944 | 359 | |
13fa14e1 DM |
360 | prot = HV_PCI_MAP_ATTR_READ; |
361 | if (direction != DMA_TO_DEVICE) | |
362 | prot |= HV_PCI_MAP_ATTR_WRITE; | |
18397944 | 363 | |
13fa14e1 DM |
364 | outs = s = segstart = &sglist[0]; |
365 | outcount = 1; | |
366 | incount = nelems; | |
367 | handle = 0; | |
18397944 | 368 | |
13fa14e1 DM |
369 | /* Init first segment length for backout at failure */ |
370 | outs->dma_length = 0; | |
18397944 | 371 | |
13fa14e1 | 372 | spin_lock_irqsave(&iommu->lock, flags); |
18397944 | 373 | |
13fa14e1 | 374 | iommu_batch_start(dev, prot, ~0UL); |
18397944 | 375 | |
13fa14e1 | 376 | max_seg_size = dma_get_max_seg_size(dev); |
f0880257 FT |
377 | seg_boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, |
378 | IO_PAGE_SIZE) >> IO_PAGE_SHIFT; | |
379 | base_shift = iommu->page_table_map_base >> IO_PAGE_SHIFT; | |
13fa14e1 | 380 | for_each_sg(sglist, s, nelems, i) { |
f0880257 | 381 | unsigned long paddr, npages, entry, out_entry = 0, slen; |
38192d52 | 382 | |
13fa14e1 DM |
383 | slen = s->length; |
384 | /* Sanity check */ | |
385 | if (slen == 0) { | |
386 | dma_next = 0; | |
387 | continue; | |
388 | } | |
389 | /* Allocate iommu entries for that segment */ | |
390 | paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s); | |
0fcff28f | 391 | npages = iommu_num_pages(paddr, slen, IO_PAGE_SIZE); |
13fa14e1 | 392 | entry = iommu_range_alloc(dev, iommu, npages, &handle); |
38192d52 | 393 | |
13fa14e1 DM |
394 | /* Handle failure */ |
395 | if (unlikely(entry == DMA_ERROR_CODE)) { | |
396 | if (printk_ratelimit()) | |
397 | printk(KERN_INFO "iommu_alloc failed, iommu %p paddr %lx" | |
398 | " npages %lx\n", iommu, paddr, npages); | |
399 | goto iommu_map_failed; | |
400 | } | |
38192d52 | 401 | |
13fa14e1 | 402 | iommu_batch_new_entry(entry); |
38192d52 | 403 | |
13fa14e1 DM |
404 | /* Convert entry to a dma_addr_t */ |
405 | dma_addr = iommu->page_table_map_base + | |
406 | (entry << IO_PAGE_SHIFT); | |
407 | dma_addr |= (s->offset & ~IO_PAGE_MASK); | |
38192d52 | 408 | |
13fa14e1 | 409 | /* Insert into HW table */ |
38192d52 | 410 | paddr &= IO_PAGE_MASK; |
13fa14e1 | 411 | while (npages--) { |
38192d52 | 412 | err = iommu_batch_add(paddr); |
13fa14e1 | 413 | if (unlikely(err < 0L)) |
38192d52 | 414 | goto iommu_map_failed; |
13fa14e1 DM |
415 | paddr += IO_PAGE_SIZE; |
416 | } | |
417 | ||
418 | /* If we are in an open segment, try merging */ | |
419 | if (segstart != s) { | |
420 | /* We cannot merge if: | |
421 | * - allocated dma_addr isn't contiguous to previous allocation | |
422 | */ | |
423 | if ((dma_addr != dma_next) || | |
f0880257 FT |
424 | (outs->dma_length + s->length > max_seg_size) || |
425 | (is_span_boundary(out_entry, base_shift, | |
426 | seg_boundary_size, outs, s))) { | |
13fa14e1 DM |
427 | /* Can't merge: create a new segment */ |
428 | segstart = s; | |
429 | outcount++; | |
430 | outs = sg_next(outs); | |
431 | } else { | |
432 | outs->dma_length += s->length; | |
38192d52 | 433 | } |
13fa14e1 | 434 | } |
38192d52 | 435 | |
13fa14e1 DM |
436 | if (segstart == s) { |
437 | /* This is a new segment, fill entries */ | |
438 | outs->dma_address = dma_addr; | |
439 | outs->dma_length = slen; | |
f0880257 | 440 | out_entry = entry; |
38192d52 | 441 | } |
13fa14e1 DM |
442 | |
443 | /* Calculate next page pointer for contiguous check */ | |
444 | dma_next = dma_addr + slen; | |
38192d52 DM |
445 | } |
446 | ||
447 | err = iommu_batch_end(); | |
448 | ||
6a32fd4d DM |
449 | if (unlikely(err < 0L)) |
450 | goto iommu_map_failed; | |
18397944 | 451 | |
13fa14e1 | 452 | spin_unlock_irqrestore(&iommu->lock, flags); |
18397944 | 453 | |
13fa14e1 DM |
454 | if (outcount < incount) { |
455 | outs = sg_next(outs); | |
456 | outs->dma_address = DMA_ERROR_CODE; | |
457 | outs->dma_length = 0; | |
458 | } | |
459 | ||
460 | return outcount; | |
6a32fd4d DM |
461 | |
462 | iommu_map_failed: | |
13fa14e1 DM |
463 | for_each_sg(sglist, s, nelems, i) { |
464 | if (s->dma_length != 0) { | |
465 | unsigned long vaddr, npages; | |
466 | ||
467 | vaddr = s->dma_address & IO_PAGE_MASK; | |
0fcff28f JR |
468 | npages = iommu_num_pages(s->dma_address, s->dma_length, |
469 | IO_PAGE_SIZE); | |
13fa14e1 DM |
470 | iommu_range_free(iommu, vaddr, npages); |
471 | /* XXX demap? XXX */ | |
472 | s->dma_address = DMA_ERROR_CODE; | |
473 | s->dma_length = 0; | |
474 | } | |
475 | if (s == outs) | |
476 | break; | |
477 | } | |
6a32fd4d DM |
478 | spin_unlock_irqrestore(&iommu->lock, flags); |
479 | ||
480 | return 0; | |
8f6a93a1 DM |
481 | } |
482 | ||
ad7ad57c | 483 | static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, |
bc0a14f1 FT |
484 | int nelems, enum dma_data_direction direction, |
485 | struct dma_attrs *attrs) | |
8f6a93a1 | 486 | { |
a2fb23af | 487 | struct pci_pbm_info *pbm; |
13fa14e1 | 488 | struct scatterlist *sg; |
16ce82d8 | 489 | struct iommu *iommu; |
13fa14e1 DM |
490 | unsigned long flags; |
491 | u32 devhandle; | |
18397944 | 492 | |
13fa14e1 | 493 | BUG_ON(direction == DMA_NONE); |
18397944 | 494 | |
ad7ad57c DM |
495 | iommu = dev->archdata.iommu; |
496 | pbm = dev->archdata.host_controller; | |
a2fb23af | 497 | devhandle = pbm->devhandle; |
18397944 | 498 | |
18397944 DM |
499 | spin_lock_irqsave(&iommu->lock, flags); |
500 | ||
13fa14e1 DM |
501 | sg = sglist; |
502 | while (nelems--) { | |
503 | dma_addr_t dma_handle = sg->dma_address; | |
504 | unsigned int len = sg->dma_length; | |
505 | unsigned long npages, entry; | |
506 | ||
507 | if (!len) | |
508 | break; | |
0fcff28f | 509 | npages = iommu_num_pages(dma_handle, len, IO_PAGE_SIZE); |
13fa14e1 DM |
510 | iommu_range_free(iommu, dma_handle, npages); |
511 | ||
512 | entry = ((dma_handle - iommu->page_table_map_base) >> IO_PAGE_SHIFT); | |
513 | while (npages) { | |
514 | unsigned long num; | |
515 | ||
516 | num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), | |
517 | npages); | |
518 | entry += num; | |
519 | npages -= num; | |
520 | } | |
18397944 | 521 | |
13fa14e1 DM |
522 | sg = sg_next(sg); |
523 | } | |
18397944 DM |
524 | |
525 | spin_unlock_irqrestore(&iommu->lock, flags); | |
8f6a93a1 DM |
526 | } |
527 | ||
ad7ad57c DM |
528 | static void dma_4v_sync_single_for_cpu(struct device *dev, |
529 | dma_addr_t bus_addr, size_t sz, | |
530 | enum dma_data_direction direction) | |
8f6a93a1 | 531 | { |
18397944 | 532 | /* Nothing to do... */ |
8f6a93a1 DM |
533 | } |
534 | ||
ad7ad57c DM |
535 | static void dma_4v_sync_sg_for_cpu(struct device *dev, |
536 | struct scatterlist *sglist, int nelems, | |
537 | enum dma_data_direction direction) | |
8f6a93a1 | 538 | { |
18397944 | 539 | /* Nothing to do... */ |
8f6a93a1 DM |
540 | } |
541 | ||
02f7a189 | 542 | static struct dma_map_ops sun4v_dma_ops = { |
ad7ad57c DM |
543 | .alloc_coherent = dma_4v_alloc_coherent, |
544 | .free_coherent = dma_4v_free_coherent, | |
797a7568 FT |
545 | .map_page = dma_4v_map_page, |
546 | .unmap_page = dma_4v_unmap_page, | |
ad7ad57c DM |
547 | .map_sg = dma_4v_map_sg, |
548 | .unmap_sg = dma_4v_unmap_sg, | |
549 | .sync_single_for_cpu = dma_4v_sync_single_for_cpu, | |
550 | .sync_sg_for_cpu = dma_4v_sync_sg_for_cpu, | |
8f6a93a1 DM |
551 | }; |
552 | ||
9a2ed5cc DM |
553 | static void __devinit pci_sun4v_scan_bus(struct pci_pbm_info *pbm, |
554 | struct device *parent) | |
bade5622 | 555 | { |
e87dc350 DM |
556 | struct property *prop; |
557 | struct device_node *dp; | |
558 | ||
22fecbae | 559 | dp = pbm->op->node; |
34768bc8 DM |
560 | prop = of_find_property(dp, "66mhz-capable", NULL); |
561 | pbm->is_66mhz_capable = (prop != NULL); | |
e822358a | 562 | pbm->pci_bus = pci_scan_one_pbm(pbm, parent); |
c2609267 DM |
563 | |
564 | /* XXX register error interrupt handlers XXX */ | |
bade5622 DM |
565 | } |
566 | ||
9a2ed5cc DM |
567 | static unsigned long __devinit probe_existing_entries(struct pci_pbm_info *pbm, |
568 | struct iommu *iommu) | |
18397944 | 569 | { |
9b3627f3 | 570 | struct iommu_arena *arena = &iommu->arena; |
e7a0453e | 571 | unsigned long i, cnt = 0; |
7c8f486a | 572 | u32 devhandle; |
18397944 DM |
573 | |
574 | devhandle = pbm->devhandle; | |
575 | for (i = 0; i < arena->limit; i++) { | |
576 | unsigned long ret, io_attrs, ra; | |
577 | ||
578 | ret = pci_sun4v_iommu_getmap(devhandle, | |
579 | HV_PCI_TSBID(0, i), | |
580 | &io_attrs, &ra); | |
e7a0453e | 581 | if (ret == HV_EOK) { |
c2a5a46b DM |
582 | if (page_in_phys_avail(ra)) { |
583 | pci_sun4v_iommu_demap(devhandle, | |
584 | HV_PCI_TSBID(0, i), 1); | |
585 | } else { | |
586 | cnt++; | |
587 | __set_bit(i, arena->map); | |
588 | } | |
e7a0453e | 589 | } |
18397944 | 590 | } |
e7a0453e DM |
591 | |
592 | return cnt; | |
18397944 DM |
593 | } |
594 | ||
9a2ed5cc | 595 | static int __devinit pci_sun4v_iommu_init(struct pci_pbm_info *pbm) |
bade5622 | 596 | { |
8aef7278 | 597 | static const u32 vdma_default[] = { 0x80000000, 0x80000000 }; |
16ce82d8 | 598 | struct iommu *iommu = pbm->iommu; |
59db8102 | 599 | unsigned long num_tsb_entries, sz, tsbsize; |
8aef7278 DM |
600 | u32 dma_mask, dma_offset; |
601 | const u32 *vdma; | |
602 | ||
22fecbae | 603 | vdma = of_get_property(pbm->op->node, "virtual-dma", NULL); |
8aef7278 DM |
604 | if (!vdma) |
605 | vdma = vdma_default; | |
18397944 | 606 | |
59db8102 | 607 | if ((vdma[0] | vdma[1]) & ~IO_PAGE_MASK) { |
3822b509 DM |
608 | printk(KERN_ERR PFX "Strange virtual-dma[%08x:%08x].\n", |
609 | vdma[0], vdma[1]); | |
610 | return -EINVAL; | |
18397944 DM |
611 | }; |
612 | ||
59db8102 DM |
613 | dma_mask = (roundup_pow_of_two(vdma[1]) - 1UL); |
614 | num_tsb_entries = vdma[1] / IO_PAGE_SIZE; | |
615 | tsbsize = num_tsb_entries * sizeof(iopte_t); | |
18397944 DM |
616 | |
617 | dma_offset = vdma[0]; | |
618 | ||
619 | /* Setup initial software IOMMU state. */ | |
620 | spin_lock_init(&iommu->lock); | |
621 | iommu->ctx_lowest_free = 1; | |
622 | iommu->page_table_map_base = dma_offset; | |
623 | iommu->dma_addr_mask = dma_mask; | |
624 | ||
625 | /* Allocate and initialize the free area map. */ | |
59db8102 | 626 | sz = (num_tsb_entries + 7) / 8; |
18397944 | 627 | sz = (sz + 7UL) & ~7UL; |
982c2064 | 628 | iommu->arena.map = kzalloc(sz, GFP_KERNEL); |
18397944 | 629 | if (!iommu->arena.map) { |
3822b509 DM |
630 | printk(KERN_ERR PFX "Error, kmalloc(arena.map) failed.\n"); |
631 | return -ENOMEM; | |
18397944 | 632 | } |
18397944 DM |
633 | iommu->arena.limit = num_tsb_entries; |
634 | ||
e7a0453e | 635 | sz = probe_existing_entries(pbm, iommu); |
c2a5a46b DM |
636 | if (sz) |
637 | printk("%s: Imported %lu TSB entries from OBP\n", | |
638 | pbm->name, sz); | |
3822b509 DM |
639 | |
640 | return 0; | |
bade5622 DM |
641 | } |
642 | ||
35a17eb6 DM |
643 | #ifdef CONFIG_PCI_MSI |
644 | struct pci_sun4v_msiq_entry { | |
645 | u64 version_type; | |
646 | #define MSIQ_VERSION_MASK 0xffffffff00000000UL | |
647 | #define MSIQ_VERSION_SHIFT 32 | |
648 | #define MSIQ_TYPE_MASK 0x00000000000000ffUL | |
649 | #define MSIQ_TYPE_SHIFT 0 | |
650 | #define MSIQ_TYPE_NONE 0x00 | |
651 | #define MSIQ_TYPE_MSG 0x01 | |
652 | #define MSIQ_TYPE_MSI32 0x02 | |
653 | #define MSIQ_TYPE_MSI64 0x03 | |
654 | #define MSIQ_TYPE_INTX 0x08 | |
655 | #define MSIQ_TYPE_NONE2 0xff | |
656 | ||
657 | u64 intx_sysino; | |
658 | u64 reserved1; | |
659 | u64 stick; | |
660 | u64 req_id; /* bus/device/func */ | |
661 | #define MSIQ_REQID_BUS_MASK 0xff00UL | |
662 | #define MSIQ_REQID_BUS_SHIFT 8 | |
663 | #define MSIQ_REQID_DEVICE_MASK 0x00f8UL | |
664 | #define MSIQ_REQID_DEVICE_SHIFT 3 | |
665 | #define MSIQ_REQID_FUNC_MASK 0x0007UL | |
666 | #define MSIQ_REQID_FUNC_SHIFT 0 | |
667 | ||
668 | u64 msi_address; | |
669 | ||
e5dd42e4 | 670 | /* The format of this value is message type dependent. |
35a17eb6 DM |
671 | * For MSI bits 15:0 are the data from the MSI packet. |
672 | * For MSI-X bits 31:0 are the data from the MSI packet. | |
673 | * For MSG, the message code and message routing code where: | |
674 | * bits 39:32 is the bus/device/fn of the msg target-id | |
675 | * bits 18:16 is the message routing code | |
676 | * bits 7:0 is the message code | |
677 | * For INTx the low order 2-bits are: | |
678 | * 00 - INTA | |
679 | * 01 - INTB | |
680 | * 10 - INTC | |
681 | * 11 - INTD | |
682 | */ | |
683 | u64 msi_data; | |
684 | ||
685 | u64 reserved2; | |
686 | }; | |
687 | ||
759f89e0 DM |
688 | static int pci_sun4v_get_head(struct pci_pbm_info *pbm, unsigned long msiqid, |
689 | unsigned long *head) | |
35a17eb6 | 690 | { |
759f89e0 | 691 | unsigned long err, limit; |
35a17eb6 | 692 | |
759f89e0 | 693 | err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, head); |
35a17eb6 | 694 | if (unlikely(err)) |
759f89e0 | 695 | return -ENXIO; |
35a17eb6 | 696 | |
759f89e0 DM |
697 | limit = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); |
698 | if (unlikely(*head >= limit)) | |
699 | return -EFBIG; | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static int pci_sun4v_dequeue_msi(struct pci_pbm_info *pbm, | |
705 | unsigned long msiqid, unsigned long *head, | |
706 | unsigned long *msi) | |
707 | { | |
708 | struct pci_sun4v_msiq_entry *ep; | |
709 | unsigned long err, type; | |
710 | ||
711 | /* Note: void pointer arithmetic, 'head' is a byte offset */ | |
712 | ep = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * | |
713 | (pbm->msiq_ent_count * | |
714 | sizeof(struct pci_sun4v_msiq_entry))) + | |
715 | *head); | |
716 | ||
717 | if ((ep->version_type & MSIQ_TYPE_MASK) == 0) | |
718 | return 0; | |
35a17eb6 | 719 | |
759f89e0 DM |
720 | type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; |
721 | if (unlikely(type != MSIQ_TYPE_MSI32 && | |
722 | type != MSIQ_TYPE_MSI64)) | |
723 | return -EINVAL; | |
35a17eb6 | 724 | |
759f89e0 DM |
725 | *msi = ep->msi_data; |
726 | ||
727 | err = pci_sun4v_msi_setstate(pbm->devhandle, | |
728 | ep->msi_data /* msi_num */, | |
729 | HV_MSISTATE_IDLE); | |
730 | if (unlikely(err)) | |
731 | return -ENXIO; | |
35a17eb6 | 732 | |
759f89e0 DM |
733 | /* Clear the entry. */ |
734 | ep->version_type &= ~MSIQ_TYPE_MASK; | |
35a17eb6 | 735 | |
759f89e0 DM |
736 | (*head) += sizeof(struct pci_sun4v_msiq_entry); |
737 | if (*head >= | |
738 | (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry))) | |
739 | *head = 0; | |
35a17eb6 | 740 | |
759f89e0 | 741 | return 1; |
35a17eb6 DM |
742 | } |
743 | ||
759f89e0 DM |
744 | static int pci_sun4v_set_head(struct pci_pbm_info *pbm, unsigned long msiqid, |
745 | unsigned long head) | |
35a17eb6 | 746 | { |
759f89e0 | 747 | unsigned long err; |
35a17eb6 | 748 | |
759f89e0 DM |
749 | err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); |
750 | if (unlikely(err)) | |
751 | return -EINVAL; | |
35a17eb6 | 752 | |
759f89e0 DM |
753 | return 0; |
754 | } | |
35a17eb6 | 755 | |
759f89e0 DM |
756 | static int pci_sun4v_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid, |
757 | unsigned long msi, int is_msi64) | |
758 | { | |
759 | if (pci_sun4v_msi_setmsiq(pbm->devhandle, msi, msiqid, | |
760 | (is_msi64 ? | |
761 | HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) | |
762 | return -ENXIO; | |
763 | if (pci_sun4v_msi_setstate(pbm->devhandle, msi, HV_MSISTATE_IDLE)) | |
764 | return -ENXIO; | |
765 | if (pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_VALID)) | |
766 | return -ENXIO; | |
35a17eb6 DM |
767 | return 0; |
768 | } | |
769 | ||
759f89e0 | 770 | static int pci_sun4v_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi) |
35a17eb6 | 771 | { |
759f89e0 DM |
772 | unsigned long err, msiqid; |
773 | ||
774 | err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi, &msiqid); | |
775 | if (err) | |
776 | return -ENXIO; | |
777 | ||
778 | pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_INVALID); | |
779 | ||
780 | return 0; | |
35a17eb6 DM |
781 | } |
782 | ||
759f89e0 | 783 | static int pci_sun4v_msiq_alloc(struct pci_pbm_info *pbm) |
35a17eb6 DM |
784 | { |
785 | unsigned long q_size, alloc_size, pages, order; | |
786 | int i; | |
787 | ||
788 | q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); | |
789 | alloc_size = (pbm->msiq_num * q_size); | |
790 | order = get_order(alloc_size); | |
791 | pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order); | |
792 | if (pages == 0UL) { | |
793 | printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n", | |
794 | order); | |
795 | return -ENOMEM; | |
796 | } | |
797 | memset((char *)pages, 0, PAGE_SIZE << order); | |
798 | pbm->msi_queues = (void *) pages; | |
799 | ||
800 | for (i = 0; i < pbm->msiq_num; i++) { | |
801 | unsigned long err, base = __pa(pages + (i * q_size)); | |
802 | unsigned long ret1, ret2; | |
803 | ||
804 | err = pci_sun4v_msiq_conf(pbm->devhandle, | |
805 | pbm->msiq_first + i, | |
806 | base, pbm->msiq_ent_count); | |
807 | if (err) { | |
808 | printk(KERN_ERR "MSI: msiq register fails (err=%lu)\n", | |
809 | err); | |
810 | goto h_error; | |
811 | } | |
812 | ||
813 | err = pci_sun4v_msiq_info(pbm->devhandle, | |
814 | pbm->msiq_first + i, | |
815 | &ret1, &ret2); | |
816 | if (err) { | |
817 | printk(KERN_ERR "MSI: Cannot read msiq (err=%lu)\n", | |
818 | err); | |
819 | goto h_error; | |
820 | } | |
821 | if (ret1 != base || ret2 != pbm->msiq_ent_count) { | |
822 | printk(KERN_ERR "MSI: Bogus qconf " | |
823 | "expected[%lx:%x] got[%lx:%lx]\n", | |
824 | base, pbm->msiq_ent_count, | |
825 | ret1, ret2); | |
826 | goto h_error; | |
827 | } | |
828 | } | |
829 | ||
830 | return 0; | |
831 | ||
832 | h_error: | |
833 | free_pages(pages, order); | |
834 | return -EINVAL; | |
835 | } | |
836 | ||
759f89e0 | 837 | static void pci_sun4v_msiq_free(struct pci_pbm_info *pbm) |
35a17eb6 | 838 | { |
759f89e0 | 839 | unsigned long q_size, alloc_size, pages, order; |
35a17eb6 DM |
840 | int i; |
841 | ||
759f89e0 DM |
842 | for (i = 0; i < pbm->msiq_num; i++) { |
843 | unsigned long msiqid = pbm->msiq_first + i; | |
35a17eb6 | 844 | |
759f89e0 | 845 | (void) pci_sun4v_msiq_conf(pbm->devhandle, msiqid, 0UL, 0); |
35a17eb6 | 846 | } |
7fe3730d | 847 | |
759f89e0 DM |
848 | q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); |
849 | alloc_size = (pbm->msiq_num * q_size); | |
850 | order = get_order(alloc_size); | |
35a17eb6 | 851 | |
759f89e0 | 852 | pages = (unsigned long) pbm->msi_queues; |
35a17eb6 | 853 | |
759f89e0 | 854 | free_pages(pages, order); |
35a17eb6 | 855 | |
759f89e0 | 856 | pbm->msi_queues = NULL; |
35a17eb6 DM |
857 | } |
858 | ||
759f89e0 DM |
859 | static int pci_sun4v_msiq_build_irq(struct pci_pbm_info *pbm, |
860 | unsigned long msiqid, | |
861 | unsigned long devino) | |
35a17eb6 | 862 | { |
759f89e0 | 863 | unsigned int virt_irq = sun4v_build_irq(pbm->devhandle, devino); |
35a17eb6 | 864 | |
759f89e0 DM |
865 | if (!virt_irq) |
866 | return -ENOMEM; | |
35a17eb6 | 867 | |
759f89e0 DM |
868 | if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) |
869 | return -EINVAL; | |
870 | if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) | |
871 | return -EINVAL; | |
35a17eb6 | 872 | |
759f89e0 | 873 | return virt_irq; |
35a17eb6 | 874 | } |
e9870c4c | 875 | |
759f89e0 DM |
876 | static const struct sparc64_msiq_ops pci_sun4v_msiq_ops = { |
877 | .get_head = pci_sun4v_get_head, | |
878 | .dequeue_msi = pci_sun4v_dequeue_msi, | |
879 | .set_head = pci_sun4v_set_head, | |
880 | .msi_setup = pci_sun4v_msi_setup, | |
881 | .msi_teardown = pci_sun4v_msi_teardown, | |
882 | .msiq_alloc = pci_sun4v_msiq_alloc, | |
883 | .msiq_free = pci_sun4v_msiq_free, | |
884 | .msiq_build_irq = pci_sun4v_msiq_build_irq, | |
885 | }; | |
886 | ||
e9870c4c DM |
887 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) |
888 | { | |
759f89e0 | 889 | sparc64_pbm_msi_init(pbm, &pci_sun4v_msiq_ops); |
e9870c4c | 890 | } |
35a17eb6 DM |
891 | #else /* CONFIG_PCI_MSI */ |
892 | static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) | |
893 | { | |
894 | } | |
895 | #endif /* !(CONFIG_PCI_MSI) */ | |
896 | ||
9a2ed5cc DM |
897 | static int __devinit pci_sun4v_pbm_init(struct pci_pbm_info *pbm, |
898 | struct of_device *op, u32 devhandle) | |
bade5622 | 899 | { |
e822358a | 900 | struct device_node *dp = op->node; |
3822b509 | 901 | int err; |
bade5622 | 902 | |
c1b1a5f1 DM |
903 | pbm->numa_node = of_node_to_nid(dp); |
904 | ||
ca3dd88e DM |
905 | pbm->pci_ops = &sun4v_pci_ops; |
906 | pbm->config_space_reg_bits = 12; | |
34768bc8 | 907 | |
6c108f12 DM |
908 | pbm->index = pci_num_pbms++; |
909 | ||
22fecbae | 910 | pbm->op = op; |
bade5622 | 911 | |
3833789b | 912 | pbm->devhandle = devhandle; |
bade5622 | 913 | |
e87dc350 | 914 | pbm->name = dp->full_name; |
bade5622 | 915 | |
e87dc350 | 916 | printk("%s: SUN4V PCI Bus Module\n", pbm->name); |
c1b1a5f1 | 917 | printk("%s: On NUMA node %d\n", pbm->name, pbm->numa_node); |
bade5622 | 918 | |
9fd8b647 | 919 | pci_determine_mem_io_space(pbm); |
bade5622 | 920 | |
cfa0652c | 921 | pci_get_pbm_props(pbm); |
3822b509 DM |
922 | |
923 | err = pci_sun4v_iommu_init(pbm); | |
924 | if (err) | |
925 | return err; | |
926 | ||
35a17eb6 | 927 | pci_sun4v_msi_init(pbm); |
3822b509 | 928 | |
e822358a | 929 | pci_sun4v_scan_bus(pbm, &op->dev); |
3822b509 | 930 | |
d3ae4b5b DM |
931 | pbm->next = pci_pbm_root; |
932 | pci_pbm_root = pbm; | |
933 | ||
3822b509 | 934 | return 0; |
bade5622 DM |
935 | } |
936 | ||
33b07db9 | 937 | static int __devinit pci_sun4v_probe(struct of_device *op, |
3822b509 | 938 | const struct of_device_id *match) |
8f6a93a1 | 939 | { |
3822b509 | 940 | const struct linux_prom64_registers *regs; |
e01c0d6d | 941 | static int hvapi_negotiated = 0; |
34768bc8 | 942 | struct pci_pbm_info *pbm; |
3822b509 | 943 | struct device_node *dp; |
16ce82d8 | 944 | struct iommu *iommu; |
7c8f486a | 945 | u32 devhandle; |
d7472c38 | 946 | int i, err; |
3833789b | 947 | |
3822b509 DM |
948 | dp = op->node; |
949 | ||
e01c0d6d | 950 | if (!hvapi_negotiated++) { |
8d2aec51 DM |
951 | err = sun4v_hvapi_register(HV_GRP_PCI, |
952 | vpci_major, | |
953 | &vpci_minor); | |
e01c0d6d DM |
954 | |
955 | if (err) { | |
3822b509 DM |
956 | printk(KERN_ERR PFX "Could not register hvapi, " |
957 | "err=%d\n", err); | |
958 | return err; | |
e01c0d6d | 959 | } |
3822b509 | 960 | printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n", |
e01c0d6d | 961 | vpci_major, vpci_minor); |
ad7ad57c DM |
962 | |
963 | dma_ops = &sun4v_dma_ops; | |
e01c0d6d DM |
964 | } |
965 | ||
3822b509 | 966 | regs = of_get_property(dp, "reg", NULL); |
d7472c38 | 967 | err = -ENODEV; |
3822b509 DM |
968 | if (!regs) { |
969 | printk(KERN_ERR PFX "Could not find config registers\n"); | |
d7472c38 | 970 | goto out_err; |
75c6d141 | 971 | } |
e87dc350 | 972 | devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff; |
3833789b | 973 | |
d7472c38 | 974 | err = -ENOMEM; |
d3ae4b5b DM |
975 | if (!iommu_batch_initialized) { |
976 | for_each_possible_cpu(i) { | |
977 | unsigned long page = get_zeroed_page(GFP_KERNEL); | |
7c8f486a | 978 | |
d3ae4b5b DM |
979 | if (!page) |
980 | goto out_err; | |
7c8f486a | 981 | |
d3ae4b5b DM |
982 | per_cpu(iommu_batch, i).pglist = (u64 *) page; |
983 | } | |
984 | iommu_batch_initialized = 1; | |
bade5622 | 985 | } |
7c8f486a | 986 | |
d3ae4b5b DM |
987 | pbm = kzalloc(sizeof(*pbm), GFP_KERNEL); |
988 | if (!pbm) { | |
989 | printk(KERN_ERR PFX "Could not allocate pci_pbm_info\n"); | |
d7472c38 | 990 | goto out_err; |
3822b509 | 991 | } |
7c8f486a | 992 | |
d3ae4b5b | 993 | iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL); |
3822b509 | 994 | if (!iommu) { |
d3ae4b5b | 995 | printk(KERN_ERR PFX "Could not allocate pbm iommu\n"); |
d7472c38 | 996 | goto out_free_controller; |
3822b509 | 997 | } |
7c8f486a | 998 | |
d3ae4b5b | 999 | pbm->iommu = iommu; |
bade5622 | 1000 | |
d3ae4b5b DM |
1001 | err = pci_sun4v_pbm_init(pbm, op, devhandle); |
1002 | if (err) | |
1003 | goto out_free_iommu; | |
7c8f486a | 1004 | |
d3ae4b5b | 1005 | dev_set_drvdata(&op->dev, pbm); |
bade5622 | 1006 | |
d3ae4b5b | 1007 | return 0; |
7c8f486a | 1008 | |
d3ae4b5b DM |
1009 | out_free_iommu: |
1010 | kfree(pbm->iommu); | |
d7472c38 DM |
1011 | |
1012 | out_free_controller: | |
d3ae4b5b | 1013 | kfree(pbm); |
d7472c38 DM |
1014 | |
1015 | out_err: | |
1016 | return err; | |
8f6a93a1 | 1017 | } |
3822b509 | 1018 | |
fd098316 | 1019 | static struct of_device_id __initdata pci_sun4v_match[] = { |
3822b509 DM |
1020 | { |
1021 | .name = "pci", | |
1022 | .compatible = "SUNW,sun4v-pci", | |
1023 | }, | |
1024 | {}, | |
1025 | }; | |
1026 | ||
1027 | static struct of_platform_driver pci_sun4v_driver = { | |
1028 | .name = DRIVER_NAME, | |
1029 | .match_table = pci_sun4v_match, | |
1030 | .probe = pci_sun4v_probe, | |
1031 | }; | |
1032 | ||
1033 | static int __init pci_sun4v_init(void) | |
1034 | { | |
1035 | return of_register_driver(&pci_sun4v_driver, &of_bus_type); | |
1036 | } | |
1037 | ||
1038 | subsys_initcall(pci_sun4v_init); |