Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation |
3 | * | |
bc97ce95 | 4 | * Rewrite, cleanup: |
1da177e4 | 5 | * |
91f14480 | 6 | * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation |
bc97ce95 | 7 | * Copyright (C) 2006 Olof Johansson <olof@lixom.net> |
1da177e4 LT |
8 | * |
9 | * Dynamic DMA mapping support, pSeries-specific parts, both SMP and LPAR. | |
10 | * | |
bc97ce95 | 11 | * |
1da177e4 LT |
12 | * This program is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
bc97ce95 | 16 | * |
1da177e4 LT |
17 | * This program is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
bc97ce95 | 21 | * |
1da177e4 LT |
22 | * You should have received a copy of the GNU General Public License |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/init.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/spinlock.h> | |
62fe91bb | 32 | #include <linux/sched.h> /* for show_stack */ |
1da177e4 LT |
33 | #include <linux/string.h> |
34 | #include <linux/pci.h> | |
35 | #include <linux/dma-mapping.h> | |
62a8bd6c | 36 | #include <linux/crash_dump.h> |
4e8b0cf4 | 37 | #include <linux/memory.h> |
1da177e4 LT |
38 | #include <asm/io.h> |
39 | #include <asm/prom.h> | |
40 | #include <asm/rtas.h> | |
1da177e4 LT |
41 | #include <asm/iommu.h> |
42 | #include <asm/pci-bridge.h> | |
43 | #include <asm/machdep.h> | |
44 | #include <asm/abs_addr.h> | |
1da177e4 | 45 | #include <asm/pSeries_reconfig.h> |
1ababe11 | 46 | #include <asm/firmware.h> |
c707ffcf | 47 | #include <asm/tce.h> |
d387899f | 48 | #include <asm/ppc-pci.h> |
2249ca9d | 49 | #include <asm/udbg.h> |
4e8b0cf4 | 50 | #include <asm/mmzone.h> |
1da177e4 | 51 | |
a1218720 ME |
52 | #include "plpar_wrappers.h" |
53 | ||
1da177e4 | 54 | |
8d3d589a MM |
55 | static void tce_invalidate_pSeries_sw(struct iommu_table *tbl, |
56 | u64 *startp, u64 *endp) | |
57 | { | |
58 | u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index; | |
59 | unsigned long start, end, inc; | |
60 | ||
61 | start = __pa(startp); | |
62 | end = __pa(endp); | |
63 | inc = L1_CACHE_BYTES; /* invalidate a cacheline of TCEs at a time */ | |
64 | ||
65 | /* If this is non-zero, change the format. We shift the | |
66 | * address and or in the magic from the device tree. */ | |
67 | if (tbl->it_busno) { | |
68 | start <<= 12; | |
69 | end <<= 12; | |
70 | inc <<= 12; | |
71 | start |= tbl->it_busno; | |
72 | end |= tbl->it_busno; | |
73 | } | |
74 | ||
75 | end |= inc - 1; /* round up end to be different than start */ | |
76 | ||
77 | mb(); /* Make sure TCEs in memory are written */ | |
78 | while (start <= end) { | |
79 | out_be64(invalidate, start); | |
80 | start += inc; | |
81 | } | |
82 | } | |
83 | ||
6490c490 | 84 | static int tce_build_pSeries(struct iommu_table *tbl, long index, |
bc97ce95 | 85 | long npages, unsigned long uaddr, |
4f3dd8a0 MN |
86 | enum dma_data_direction direction, |
87 | struct dma_attrs *attrs) | |
1da177e4 | 88 | { |
bc97ce95 | 89 | u64 proto_tce; |
8d3d589a | 90 | u64 *tcep, *tces; |
bc97ce95 | 91 | u64 rpn; |
1da177e4 | 92 | |
bc97ce95 | 93 | proto_tce = TCE_PCI_READ; // Read allowed |
1da177e4 LT |
94 | |
95 | if (direction != DMA_TO_DEVICE) | |
bc97ce95 | 96 | proto_tce |= TCE_PCI_WRITE; |
1da177e4 | 97 | |
8d3d589a | 98 | tces = tcep = ((u64 *)tbl->it_base) + index; |
1da177e4 LT |
99 | |
100 | while (npages--) { | |
95f72d1e | 101 | /* can't move this out since we might cross MEMBLOCK boundary */ |
bc97ce95 OJ |
102 | rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT; |
103 | *tcep = proto_tce | (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT; | |
1da177e4 | 104 | |
d0035c62 | 105 | uaddr += TCE_PAGE_SIZE; |
bc97ce95 | 106 | tcep++; |
1da177e4 | 107 | } |
8d3d589a | 108 | |
bc6dc752 | 109 | if (tbl->it_type & TCE_PCI_SWINV_CREATE) |
8d3d589a | 110 | tce_invalidate_pSeries_sw(tbl, tces, tcep - 1); |
6490c490 | 111 | return 0; |
1da177e4 LT |
112 | } |
113 | ||
114 | ||
115 | static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages) | |
116 | { | |
8d3d589a | 117 | u64 *tcep, *tces; |
1da177e4 | 118 | |
8d3d589a | 119 | tces = tcep = ((u64 *)tbl->it_base) + index; |
bc97ce95 OJ |
120 | |
121 | while (npages--) | |
122 | *(tcep++) = 0; | |
8d3d589a | 123 | |
bc6dc752 | 124 | if (tbl->it_type & TCE_PCI_SWINV_FREE) |
8d3d589a | 125 | tce_invalidate_pSeries_sw(tbl, tces, tcep - 1); |
1da177e4 LT |
126 | } |
127 | ||
5f50867b HM |
128 | static unsigned long tce_get_pseries(struct iommu_table *tbl, long index) |
129 | { | |
130 | u64 *tcep; | |
131 | ||
5f50867b HM |
132 | tcep = ((u64 *)tbl->it_base) + index; |
133 | ||
134 | return *tcep; | |
135 | } | |
1da177e4 | 136 | |
6490c490 RJ |
137 | static void tce_free_pSeriesLP(struct iommu_table*, long, long); |
138 | static void tce_freemulti_pSeriesLP(struct iommu_table*, long, long); | |
139 | ||
140 | static int tce_build_pSeriesLP(struct iommu_table *tbl, long tcenum, | |
1da177e4 | 141 | long npages, unsigned long uaddr, |
4f3dd8a0 MN |
142 | enum dma_data_direction direction, |
143 | struct dma_attrs *attrs) | |
1da177e4 | 144 | { |
6490c490 | 145 | u64 rc = 0; |
bc97ce95 OJ |
146 | u64 proto_tce, tce; |
147 | u64 rpn; | |
6490c490 RJ |
148 | int ret = 0; |
149 | long tcenum_start = tcenum, npages_start = npages; | |
1da177e4 | 150 | |
bc97ce95 OJ |
151 | rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT; |
152 | proto_tce = TCE_PCI_READ; | |
1da177e4 | 153 | if (direction != DMA_TO_DEVICE) |
bc97ce95 | 154 | proto_tce |= TCE_PCI_WRITE; |
1da177e4 LT |
155 | |
156 | while (npages--) { | |
bc97ce95 OJ |
157 | tce = proto_tce | (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT; |
158 | rc = plpar_tce_put((u64)tbl->it_index, (u64)tcenum << 12, tce); | |
159 | ||
6490c490 RJ |
160 | if (unlikely(rc == H_NOT_ENOUGH_RESOURCES)) { |
161 | ret = (int)rc; | |
162 | tce_free_pSeriesLP(tbl, tcenum_start, | |
163 | (npages_start - (npages + 1))); | |
164 | break; | |
165 | } | |
166 | ||
1da177e4 | 167 | if (rc && printk_ratelimit()) { |
fe333321 IM |
168 | printk("tce_build_pSeriesLP: plpar_tce_put failed. rc=%lld\n", rc); |
169 | printk("\tindex = 0x%llx\n", (u64)tbl->it_index); | |
170 | printk("\ttcenum = 0x%llx\n", (u64)tcenum); | |
171 | printk("\ttce val = 0x%llx\n", tce ); | |
1da177e4 LT |
172 | show_stack(current, (unsigned long *)__get_SP()); |
173 | } | |
bc97ce95 | 174 | |
1da177e4 | 175 | tcenum++; |
bc97ce95 | 176 | rpn++; |
1da177e4 | 177 | } |
6490c490 | 178 | return ret; |
1da177e4 LT |
179 | } |
180 | ||
a8daac8a | 181 | static DEFINE_PER_CPU(u64 *, tce_page); |
1da177e4 | 182 | |
6490c490 | 183 | static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum, |
1da177e4 | 184 | long npages, unsigned long uaddr, |
4f3dd8a0 MN |
185 | enum dma_data_direction direction, |
186 | struct dma_attrs *attrs) | |
1da177e4 | 187 | { |
6490c490 | 188 | u64 rc = 0; |
bc97ce95 OJ |
189 | u64 proto_tce; |
190 | u64 *tcep; | |
191 | u64 rpn; | |
1da177e4 | 192 | long l, limit; |
6490c490 RJ |
193 | long tcenum_start = tcenum, npages_start = npages; |
194 | int ret = 0; | |
1da177e4 | 195 | |
541b2755 | 196 | if (npages == 1) { |
6490c490 RJ |
197 | return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr, |
198 | direction, attrs); | |
541b2755 | 199 | } |
1da177e4 LT |
200 | |
201 | tcep = __get_cpu_var(tce_page); | |
202 | ||
203 | /* This is safe to do since interrupts are off when we're called | |
204 | * from iommu_alloc{,_sg}() | |
205 | */ | |
206 | if (!tcep) { | |
bc97ce95 | 207 | tcep = (u64 *)__get_free_page(GFP_ATOMIC); |
1da177e4 | 208 | /* If allocation fails, fall back to the loop implementation */ |
541b2755 | 209 | if (!tcep) { |
6490c490 | 210 | return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr, |
4f3dd8a0 | 211 | direction, attrs); |
541b2755 | 212 | } |
1da177e4 LT |
213 | __get_cpu_var(tce_page) = tcep; |
214 | } | |
215 | ||
bc97ce95 OJ |
216 | rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT; |
217 | proto_tce = TCE_PCI_READ; | |
1da177e4 | 218 | if (direction != DMA_TO_DEVICE) |
bc97ce95 | 219 | proto_tce |= TCE_PCI_WRITE; |
1da177e4 LT |
220 | |
221 | /* We can map max one pageful of TCEs at a time */ | |
222 | do { | |
223 | /* | |
224 | * Set up the page with TCE data, looping through and setting | |
225 | * the values. | |
226 | */ | |
bc97ce95 | 227 | limit = min_t(long, npages, 4096/TCE_ENTRY_SIZE); |
1da177e4 LT |
228 | |
229 | for (l = 0; l < limit; l++) { | |
bc97ce95 OJ |
230 | tcep[l] = proto_tce | (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT; |
231 | rpn++; | |
1da177e4 LT |
232 | } |
233 | ||
234 | rc = plpar_tce_put_indirect((u64)tbl->it_index, | |
235 | (u64)tcenum << 12, | |
236 | (u64)virt_to_abs(tcep), | |
237 | limit); | |
238 | ||
239 | npages -= limit; | |
240 | tcenum += limit; | |
241 | } while (npages > 0 && !rc); | |
242 | ||
6490c490 RJ |
243 | if (unlikely(rc == H_NOT_ENOUGH_RESOURCES)) { |
244 | ret = (int)rc; | |
245 | tce_freemulti_pSeriesLP(tbl, tcenum_start, | |
246 | (npages_start - (npages + limit))); | |
247 | return ret; | |
248 | } | |
249 | ||
1da177e4 | 250 | if (rc && printk_ratelimit()) { |
fe333321 IM |
251 | printk("tce_buildmulti_pSeriesLP: plpar_tce_put failed. rc=%lld\n", rc); |
252 | printk("\tindex = 0x%llx\n", (u64)tbl->it_index); | |
253 | printk("\tnpages = 0x%llx\n", (u64)npages); | |
254 | printk("\ttce[0] val = 0x%llx\n", tcep[0]); | |
1da177e4 LT |
255 | show_stack(current, (unsigned long *)__get_SP()); |
256 | } | |
6490c490 | 257 | return ret; |
1da177e4 LT |
258 | } |
259 | ||
260 | static void tce_free_pSeriesLP(struct iommu_table *tbl, long tcenum, long npages) | |
261 | { | |
262 | u64 rc; | |
1da177e4 | 263 | |
1da177e4 | 264 | while (npages--) { |
bc97ce95 | 265 | rc = plpar_tce_put((u64)tbl->it_index, (u64)tcenum << 12, 0); |
1da177e4 LT |
266 | |
267 | if (rc && printk_ratelimit()) { | |
fe333321 IM |
268 | printk("tce_free_pSeriesLP: plpar_tce_put failed. rc=%lld\n", rc); |
269 | printk("\tindex = 0x%llx\n", (u64)tbl->it_index); | |
270 | printk("\ttcenum = 0x%llx\n", (u64)tcenum); | |
1da177e4 LT |
271 | show_stack(current, (unsigned long *)__get_SP()); |
272 | } | |
273 | ||
274 | tcenum++; | |
275 | } | |
276 | } | |
277 | ||
278 | ||
279 | static void tce_freemulti_pSeriesLP(struct iommu_table *tbl, long tcenum, long npages) | |
280 | { | |
281 | u64 rc; | |
1da177e4 | 282 | |
bc97ce95 | 283 | rc = plpar_tce_stuff((u64)tbl->it_index, (u64)tcenum << 12, 0, npages); |
1da177e4 LT |
284 | |
285 | if (rc && printk_ratelimit()) { | |
286 | printk("tce_freemulti_pSeriesLP: plpar_tce_stuff failed\n"); | |
fe333321 IM |
287 | printk("\trc = %lld\n", rc); |
288 | printk("\tindex = 0x%llx\n", (u64)tbl->it_index); | |
289 | printk("\tnpages = 0x%llx\n", (u64)npages); | |
1da177e4 LT |
290 | show_stack(current, (unsigned long *)__get_SP()); |
291 | } | |
292 | } | |
293 | ||
5f50867b HM |
294 | static unsigned long tce_get_pSeriesLP(struct iommu_table *tbl, long tcenum) |
295 | { | |
296 | u64 rc; | |
297 | unsigned long tce_ret; | |
298 | ||
5f50867b HM |
299 | rc = plpar_tce_get((u64)tbl->it_index, (u64)tcenum << 12, &tce_ret); |
300 | ||
301 | if (rc && printk_ratelimit()) { | |
fe333321 IM |
302 | printk("tce_get_pSeriesLP: plpar_tce_get failed. rc=%lld\n", rc); |
303 | printk("\tindex = 0x%llx\n", (u64)tbl->it_index); | |
304 | printk("\ttcenum = 0x%llx\n", (u64)tcenum); | |
5f50867b HM |
305 | show_stack(current, (unsigned long *)__get_SP()); |
306 | } | |
307 | ||
308 | return tce_ret; | |
309 | } | |
310 | ||
25985edc | 311 | /* this is compatible with cells for the device tree property */ |
4e8b0cf4 NA |
312 | struct dynamic_dma_window_prop { |
313 | __be32 liobn; /* tce table number */ | |
314 | __be64 dma_base; /* address hi,lo */ | |
315 | __be32 tce_shift; /* ilog2(tce_page_size) */ | |
316 | __be32 window_shift; /* ilog2(tce_window_size) */ | |
317 | }; | |
318 | ||
319 | struct direct_window { | |
320 | struct device_node *device; | |
321 | const struct dynamic_dma_window_prop *prop; | |
322 | struct list_head list; | |
323 | }; | |
324 | ||
325 | /* Dynamic DMA Window support */ | |
326 | struct ddw_query_response { | |
327 | u32 windows_available; | |
328 | u32 largest_available_block; | |
329 | u32 page_size; | |
330 | u32 migration_capable; | |
331 | }; | |
332 | ||
333 | struct ddw_create_response { | |
334 | u32 liobn; | |
335 | u32 addr_hi; | |
336 | u32 addr_lo; | |
337 | }; | |
338 | ||
339 | static LIST_HEAD(direct_window_list); | |
340 | /* prevents races between memory on/offline and window creation */ | |
341 | static DEFINE_SPINLOCK(direct_window_list_lock); | |
342 | /* protects initializing window twice for same device */ | |
343 | static DEFINE_MUTEX(direct_window_init_mutex); | |
344 | #define DIRECT64_PROPNAME "linux,direct64-ddr-window-info" | |
345 | ||
346 | static int tce_clearrange_multi_pSeriesLP(unsigned long start_pfn, | |
347 | unsigned long num_pfn, const void *arg) | |
348 | { | |
349 | const struct dynamic_dma_window_prop *maprange = arg; | |
350 | int rc; | |
351 | u64 tce_size, num_tce, dma_offset, next; | |
352 | u32 tce_shift; | |
353 | long limit; | |
354 | ||
355 | tce_shift = be32_to_cpu(maprange->tce_shift); | |
356 | tce_size = 1ULL << tce_shift; | |
357 | next = start_pfn << PAGE_SHIFT; | |
358 | num_tce = num_pfn << PAGE_SHIFT; | |
359 | ||
360 | /* round back to the beginning of the tce page size */ | |
361 | num_tce += next & (tce_size - 1); | |
362 | next &= ~(tce_size - 1); | |
363 | ||
364 | /* covert to number of tces */ | |
365 | num_tce |= tce_size - 1; | |
366 | num_tce >>= tce_shift; | |
367 | ||
368 | do { | |
369 | /* | |
370 | * Set up the page with TCE data, looping through and setting | |
371 | * the values. | |
372 | */ | |
373 | limit = min_t(long, num_tce, 512); | |
374 | dma_offset = next + be64_to_cpu(maprange->dma_base); | |
375 | ||
376 | rc = plpar_tce_stuff((u64)be32_to_cpu(maprange->liobn), | |
377 | dma_offset, | |
378 | 0, limit); | |
379 | num_tce -= limit; | |
380 | } while (num_tce > 0 && !rc); | |
381 | ||
382 | return rc; | |
383 | } | |
384 | ||
385 | static int tce_setrange_multi_pSeriesLP(unsigned long start_pfn, | |
386 | unsigned long num_pfn, const void *arg) | |
387 | { | |
388 | const struct dynamic_dma_window_prop *maprange = arg; | |
389 | u64 *tcep, tce_size, num_tce, dma_offset, next, proto_tce, liobn; | |
390 | u32 tce_shift; | |
391 | u64 rc = 0; | |
392 | long l, limit; | |
393 | ||
394 | local_irq_disable(); /* to protect tcep and the page behind it */ | |
395 | tcep = __get_cpu_var(tce_page); | |
396 | ||
397 | if (!tcep) { | |
398 | tcep = (u64 *)__get_free_page(GFP_ATOMIC); | |
399 | if (!tcep) { | |
400 | local_irq_enable(); | |
401 | return -ENOMEM; | |
402 | } | |
403 | __get_cpu_var(tce_page) = tcep; | |
404 | } | |
405 | ||
406 | proto_tce = TCE_PCI_READ | TCE_PCI_WRITE; | |
407 | ||
408 | liobn = (u64)be32_to_cpu(maprange->liobn); | |
409 | tce_shift = be32_to_cpu(maprange->tce_shift); | |
410 | tce_size = 1ULL << tce_shift; | |
411 | next = start_pfn << PAGE_SHIFT; | |
412 | num_tce = num_pfn << PAGE_SHIFT; | |
413 | ||
414 | /* round back to the beginning of the tce page size */ | |
415 | num_tce += next & (tce_size - 1); | |
416 | next &= ~(tce_size - 1); | |
417 | ||
418 | /* covert to number of tces */ | |
419 | num_tce |= tce_size - 1; | |
420 | num_tce >>= tce_shift; | |
421 | ||
422 | /* We can map max one pageful of TCEs at a time */ | |
423 | do { | |
424 | /* | |
425 | * Set up the page with TCE data, looping through and setting | |
426 | * the values. | |
427 | */ | |
428 | limit = min_t(long, num_tce, 4096/TCE_ENTRY_SIZE); | |
429 | dma_offset = next + be64_to_cpu(maprange->dma_base); | |
430 | ||
431 | for (l = 0; l < limit; l++) { | |
432 | tcep[l] = proto_tce | next; | |
433 | next += tce_size; | |
434 | } | |
435 | ||
436 | rc = plpar_tce_put_indirect(liobn, | |
437 | dma_offset, | |
438 | (u64)virt_to_abs(tcep), | |
439 | limit); | |
440 | ||
441 | num_tce -= limit; | |
442 | } while (num_tce > 0 && !rc); | |
443 | ||
444 | /* error cleanup: caller will clear whole range */ | |
445 | ||
446 | local_irq_enable(); | |
447 | return rc; | |
448 | } | |
449 | ||
450 | static int tce_setrange_multi_pSeriesLP_walk(unsigned long start_pfn, | |
451 | unsigned long num_pfn, void *arg) | |
452 | { | |
453 | return tce_setrange_multi_pSeriesLP(start_pfn, num_pfn, arg); | |
454 | } | |
455 | ||
456 | ||
bed59275 | 457 | #ifdef CONFIG_PCI |
1da177e4 LT |
458 | static void iommu_table_setparms(struct pci_controller *phb, |
459 | struct device_node *dn, | |
bc97ce95 | 460 | struct iommu_table *tbl) |
1da177e4 LT |
461 | { |
462 | struct device_node *node; | |
8d3d589a | 463 | const unsigned long *basep, *sw_inval; |
9938c474 | 464 | const u32 *sizep; |
1da177e4 | 465 | |
44ef3390 | 466 | node = phb->dn; |
1da177e4 | 467 | |
e2eb6392 SR |
468 | basep = of_get_property(node, "linux,tce-base", NULL); |
469 | sizep = of_get_property(node, "linux,tce-size", NULL); | |
1da177e4 LT |
470 | if (basep == NULL || sizep == NULL) { |
471 | printk(KERN_ERR "PCI_DMA: iommu_table_setparms: %s has " | |
472 | "missing tce entries !\n", dn->full_name); | |
473 | return; | |
474 | } | |
475 | ||
476 | tbl->it_base = (unsigned long)__va(*basep); | |
5f50867b | 477 | |
62a8bd6c | 478 | if (!is_kdump_kernel()) |
54622f10 | 479 | memset((void *)tbl->it_base, 0, *sizep); |
1da177e4 LT |
480 | |
481 | tbl->it_busno = phb->bus->number; | |
bc97ce95 | 482 | |
1da177e4 | 483 | /* Units of tce entries */ |
5d2efba6 | 484 | tbl->it_offset = phb->dma_window_base_cur >> IOMMU_PAGE_SHIFT; |
bc97ce95 | 485 | |
1da177e4 | 486 | /* Test if we are going over 2GB of DMA space */ |
3c2822cc OJ |
487 | if (phb->dma_window_base_cur + phb->dma_window_size > 0x80000000ul) { |
488 | udbg_printf("PCI_DMA: Unexpected number of IOAs under this PHB.\n"); | |
bc97ce95 | 489 | panic("PCI_DMA: Unexpected number of IOAs under this PHB.\n"); |
3c2822cc | 490 | } |
bc97ce95 | 491 | |
1da177e4 LT |
492 | phb->dma_window_base_cur += phb->dma_window_size; |
493 | ||
494 | /* Set the tce table size - measured in entries */ | |
5d2efba6 | 495 | tbl->it_size = phb->dma_window_size >> IOMMU_PAGE_SHIFT; |
1da177e4 LT |
496 | |
497 | tbl->it_index = 0; | |
498 | tbl->it_blocksize = 16; | |
499 | tbl->it_type = TCE_PCI; | |
8d3d589a MM |
500 | |
501 | sw_inval = of_get_property(node, "linux,tce-sw-invalidate-info", NULL); | |
502 | if (sw_inval) { | |
503 | /* | |
504 | * This property contains information on how to | |
505 | * invalidate the TCE entry. The first property is | |
506 | * the base MMIO address used to invalidate entries. | |
507 | * The second property tells us the format of the TCE | |
508 | * invalidate (whether it needs to be shifted) and | |
509 | * some magic routing info to add to our invalidate | |
510 | * command. | |
511 | */ | |
512 | tbl->it_index = (unsigned long) ioremap(sw_inval[0], 8); | |
513 | tbl->it_busno = sw_inval[1]; /* overload this with magic */ | |
1f1616e8 | 514 | tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE; |
8d3d589a | 515 | } |
1da177e4 LT |
516 | } |
517 | ||
518 | /* | |
519 | * iommu_table_setparms_lpar | |
520 | * | |
521 | * Function: On pSeries LPAR systems, return TCE table info, given a pci bus. | |
1da177e4 LT |
522 | */ |
523 | static void iommu_table_setparms_lpar(struct pci_controller *phb, | |
524 | struct device_node *dn, | |
525 | struct iommu_table *tbl, | |
b8c49def | 526 | const void *dma_window) |
1da177e4 | 527 | { |
4c76e0bc JK |
528 | unsigned long offset, size; |
529 | ||
4c76e0bc | 530 | of_parse_dma_window(dn, dma_window, &tbl->it_index, &offset, &size); |
1da177e4 | 531 | |
b8c49def | 532 | tbl->it_busno = phb->bus->number; |
1da177e4 | 533 | tbl->it_base = 0; |
1da177e4 LT |
534 | tbl->it_blocksize = 16; |
535 | tbl->it_type = TCE_PCI; | |
5d2efba6 LV |
536 | tbl->it_offset = offset >> IOMMU_PAGE_SHIFT; |
537 | tbl->it_size = size >> IOMMU_PAGE_SHIFT; | |
1da177e4 LT |
538 | } |
539 | ||
12d04eef | 540 | static void pci_dma_bus_setup_pSeries(struct pci_bus *bus) |
1da177e4 | 541 | { |
3c2822cc | 542 | struct device_node *dn; |
1da177e4 | 543 | struct iommu_table *tbl; |
3c2822cc OJ |
544 | struct device_node *isa_dn, *isa_dn_orig; |
545 | struct device_node *tmp; | |
546 | struct pci_dn *pci; | |
547 | int children; | |
1da177e4 | 548 | |
3c2822cc | 549 | dn = pci_bus_to_OF_node(bus); |
12d04eef | 550 | |
f7ebf352 | 551 | pr_debug("pci_dma_bus_setup_pSeries: setting up bus %s\n", dn->full_name); |
3c2822cc OJ |
552 | |
553 | if (bus->self) { | |
554 | /* This is not a root bus, any setup will be done for the | |
555 | * device-side of the bridge in iommu_dev_setup_pSeries(). | |
556 | */ | |
557 | return; | |
558 | } | |
12d04eef | 559 | pci = PCI_DN(dn); |
3c2822cc OJ |
560 | |
561 | /* Check if the ISA bus on the system is under | |
562 | * this PHB. | |
1da177e4 | 563 | */ |
3c2822cc | 564 | isa_dn = isa_dn_orig = of_find_node_by_type(NULL, "isa"); |
1da177e4 | 565 | |
3c2822cc OJ |
566 | while (isa_dn && isa_dn != dn) |
567 | isa_dn = isa_dn->parent; | |
568 | ||
569 | if (isa_dn_orig) | |
570 | of_node_put(isa_dn_orig); | |
1da177e4 | 571 | |
d3c58fb1 | 572 | /* Count number of direct PCI children of the PHB. */ |
3c2822cc | 573 | for (children = 0, tmp = dn->child; tmp; tmp = tmp->sibling) |
d3c58fb1 | 574 | children++; |
1da177e4 | 575 | |
f7ebf352 | 576 | pr_debug("Children: %d\n", children); |
1da177e4 | 577 | |
3c2822cc OJ |
578 | /* Calculate amount of DMA window per slot. Each window must be |
579 | * a power of two (due to pci_alloc_consistent requirements). | |
580 | * | |
581 | * Keep 256MB aside for PHBs with ISA. | |
582 | */ | |
1da177e4 | 583 | |
3c2822cc OJ |
584 | if (!isa_dn) { |
585 | /* No ISA/IDE - just set window size and return */ | |
586 | pci->phb->dma_window_size = 0x80000000ul; /* To be divided */ | |
587 | ||
588 | while (pci->phb->dma_window_size * children > 0x80000000ul) | |
589 | pci->phb->dma_window_size >>= 1; | |
41febbc8 | 590 | pr_debug("No ISA/IDE, window size is 0x%llx\n", |
f7ebf352 | 591 | pci->phb->dma_window_size); |
3c2822cc OJ |
592 | pci->phb->dma_window_base_cur = 0; |
593 | ||
594 | return; | |
1da177e4 | 595 | } |
3c2822cc OJ |
596 | |
597 | /* If we have ISA, then we probably have an IDE | |
598 | * controller too. Allocate a 128MB table but | |
599 | * skip the first 128MB to avoid stepping on ISA | |
600 | * space. | |
601 | */ | |
602 | pci->phb->dma_window_size = 0x8000000ul; | |
603 | pci->phb->dma_window_base_cur = 0x8000000ul; | |
604 | ||
7aa241fd | 605 | tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, |
ca1588e7 | 606 | pci->phb->node); |
3c2822cc OJ |
607 | |
608 | iommu_table_setparms(pci->phb, dn, tbl); | |
ca1588e7 | 609 | pci->iommu_table = iommu_init_table(tbl, pci->phb->node); |
3c2822cc OJ |
610 | |
611 | /* Divide the rest (1.75GB) among the children */ | |
612 | pci->phb->dma_window_size = 0x80000000ul; | |
613 | while (pci->phb->dma_window_size * children > 0x70000000ul) | |
614 | pci->phb->dma_window_size >>= 1; | |
615 | ||
41febbc8 | 616 | pr_debug("ISA/IDE, window size is 0x%llx\n", pci->phb->dma_window_size); |
1da177e4 LT |
617 | } |
618 | ||
619 | ||
12d04eef | 620 | static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) |
1da177e4 LT |
621 | { |
622 | struct iommu_table *tbl; | |
623 | struct device_node *dn, *pdn; | |
1635317f | 624 | struct pci_dn *ppci; |
954a46e2 | 625 | const void *dma_window = NULL; |
1da177e4 | 626 | |
1da177e4 LT |
627 | dn = pci_bus_to_OF_node(bus); |
628 | ||
f7ebf352 ME |
629 | pr_debug("pci_dma_bus_setup_pSeriesLP: setting up bus %s\n", |
630 | dn->full_name); | |
12d04eef | 631 | |
1da177e4 LT |
632 | /* Find nearest ibm,dma-window, walking up the device tree */ |
633 | for (pdn = dn; pdn != NULL; pdn = pdn->parent) { | |
e2eb6392 | 634 | dma_window = of_get_property(pdn, "ibm,dma-window", NULL); |
1da177e4 LT |
635 | if (dma_window != NULL) |
636 | break; | |
637 | } | |
638 | ||
639 | if (dma_window == NULL) { | |
f7ebf352 | 640 | pr_debug(" no ibm,dma-window property !\n"); |
1da177e4 LT |
641 | return; |
642 | } | |
643 | ||
e07102db | 644 | ppci = PCI_DN(pdn); |
12d04eef | 645 | |
f7ebf352 ME |
646 | pr_debug(" parent is %s, iommu_table: 0x%p\n", |
647 | pdn->full_name, ppci->iommu_table); | |
12d04eef | 648 | |
1635317f | 649 | if (!ppci->iommu_table) { |
7aa241fd | 650 | tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, |
ca1588e7 | 651 | ppci->phb->node); |
b8c49def | 652 | iommu_table_setparms_lpar(ppci->phb, pdn, tbl, dma_window); |
ca1588e7 | 653 | ppci->iommu_table = iommu_init_table(tbl, ppci->phb->node); |
f7ebf352 | 654 | pr_debug(" created table: %p\n", ppci->iommu_table); |
1da177e4 | 655 | } |
1da177e4 LT |
656 | } |
657 | ||
658 | ||
12d04eef | 659 | static void pci_dma_dev_setup_pSeries(struct pci_dev *dev) |
1da177e4 | 660 | { |
12d04eef | 661 | struct device_node *dn; |
3c2822cc | 662 | struct iommu_table *tbl; |
1da177e4 | 663 | |
f7ebf352 | 664 | pr_debug("pci_dma_dev_setup_pSeries: %s\n", pci_name(dev)); |
1da177e4 | 665 | |
58f9b0b0 | 666 | dn = dev->dev.of_node; |
1da177e4 | 667 | |
3c2822cc OJ |
668 | /* If we're the direct child of a root bus, then we need to allocate |
669 | * an iommu table ourselves. The bus setup code should have setup | |
670 | * the window sizes already. | |
671 | */ | |
672 | if (!dev->bus->self) { | |
12d04eef BH |
673 | struct pci_controller *phb = PCI_DN(dn)->phb; |
674 | ||
f7ebf352 | 675 | pr_debug(" --> first child, no bridge. Allocating iommu table.\n"); |
7aa241fd | 676 | tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, |
12d04eef BH |
677 | phb->node); |
678 | iommu_table_setparms(phb, dn, tbl); | |
77319254 | 679 | PCI_DN(dn)->iommu_table = iommu_init_table(tbl, phb->node); |
738ef42e | 680 | set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table); |
3c2822cc OJ |
681 | return; |
682 | } | |
683 | ||
684 | /* If this device is further down the bus tree, search upwards until | |
685 | * an already allocated iommu table is found and use that. | |
686 | */ | |
687 | ||
e07102db | 688 | while (dn && PCI_DN(dn) && PCI_DN(dn)->iommu_table == NULL) |
1da177e4 LT |
689 | dn = dn->parent; |
690 | ||
12d04eef | 691 | if (dn && PCI_DN(dn)) |
738ef42e | 692 | set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table); |
12d04eef BH |
693 | else |
694 | printk(KERN_WARNING "iommu: Device %s has no iommu table\n", | |
695 | pci_name(dev)); | |
1da177e4 LT |
696 | } |
697 | ||
4e8b0cf4 NA |
698 | static int __read_mostly disable_ddw; |
699 | ||
700 | static int __init disable_ddw_setup(char *str) | |
701 | { | |
702 | disable_ddw = 1; | |
703 | printk(KERN_INFO "ppc iommu: disabling ddw.\n"); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | early_param("disable_ddw", disable_ddw_setup); | |
709 | ||
710 | static void remove_ddw(struct device_node *np) | |
711 | { | |
712 | struct dynamic_dma_window_prop *dwp; | |
713 | struct property *win64; | |
b73a635f | 714 | const u32 *ddw_avail; |
4e8b0cf4 NA |
715 | u64 liobn; |
716 | int len, ret; | |
717 | ||
b73a635f | 718 | ddw_avail = of_get_property(np, "ibm,ddw-applicable", &len); |
4e8b0cf4 | 719 | win64 = of_find_property(np, DIRECT64_PROPNAME, NULL); |
2573f684 | 720 | if (!win64) |
4e8b0cf4 NA |
721 | return; |
722 | ||
b73a635f | 723 | if (!ddw_avail || len < 3 * sizeof(u32) || win64->length < sizeof(*dwp)) |
2573f684 MM |
724 | goto delprop; |
725 | ||
4e8b0cf4 NA |
726 | dwp = win64->value; |
727 | liobn = (u64)be32_to_cpu(dwp->liobn); | |
728 | ||
729 | /* clear the whole window, note the arg is in kernel pages */ | |
730 | ret = tce_clearrange_multi_pSeriesLP(0, | |
731 | 1ULL << (be32_to_cpu(dwp->window_shift) - PAGE_SHIFT), dwp); | |
732 | if (ret) | |
733 | pr_warning("%s failed to clear tces in window.\n", | |
734 | np->full_name); | |
735 | else | |
736 | pr_debug("%s successfully cleared tces in window.\n", | |
737 | np->full_name); | |
738 | ||
b73a635f | 739 | ret = rtas_call(ddw_avail[2], 1, 1, NULL, liobn); |
4e8b0cf4 NA |
740 | if (ret) |
741 | pr_warning("%s: failed to remove direct window: rtas returned " | |
742 | "%d to ibm,remove-pe-dma-window(%x) %llx\n", | |
b73a635f | 743 | np->full_name, ret, ddw_avail[2], liobn); |
4e8b0cf4 NA |
744 | else |
745 | pr_debug("%s: successfully removed direct window: rtas returned " | |
746 | "%d to ibm,remove-pe-dma-window(%x) %llx\n", | |
b73a635f | 747 | np->full_name, ret, ddw_avail[2], liobn); |
4e8b0cf4 | 748 | |
2573f684 | 749 | delprop: |
c8566780 | 750 | ret = prom_remove_property(np, win64); |
2573f684 | 751 | if (ret) |
c8566780 | 752 | pr_warning("%s: failed to remove direct window property: %d\n", |
2573f684 MM |
753 | np->full_name, ret); |
754 | } | |
4e8b0cf4 | 755 | |
b73a635f | 756 | static u64 find_existing_ddw(struct device_node *pdn) |
4e8b0cf4 | 757 | { |
4e8b0cf4 NA |
758 | struct direct_window *window; |
759 | const struct dynamic_dma_window_prop *direct64; | |
760 | u64 dma_addr = 0; | |
761 | ||
4e8b0cf4 NA |
762 | spin_lock(&direct_window_list_lock); |
763 | /* check if we already created a window and dupe that config if so */ | |
764 | list_for_each_entry(window, &direct_window_list, list) { | |
765 | if (window->device == pdn) { | |
766 | direct64 = window->prop; | |
767 | dma_addr = direct64->dma_base; | |
768 | break; | |
769 | } | |
770 | } | |
771 | spin_unlock(&direct_window_list_lock); | |
772 | ||
773 | return dma_addr; | |
774 | } | |
775 | ||
c8566780 | 776 | static int find_existing_ddw_windows(void) |
4e8b0cf4 | 777 | { |
4e8b0cf4 | 778 | int len; |
c8566780 | 779 | struct device_node *pdn; |
4e8b0cf4 NA |
780 | struct direct_window *window; |
781 | const struct dynamic_dma_window_prop *direct64; | |
4e8b0cf4 | 782 | |
c8566780 MM |
783 | if (!firmware_has_feature(FW_FEATURE_LPAR)) |
784 | return 0; | |
785 | ||
786 | for_each_node_with_property(pdn, DIRECT64_PROPNAME) { | |
787 | direct64 = of_get_property(pdn, DIRECT64_PROPNAME, &len); | |
788 | if (!direct64) | |
789 | continue; | |
790 | ||
791 | window = kzalloc(sizeof(*window), GFP_KERNEL); | |
792 | if (!window || len < sizeof(struct dynamic_dma_window_prop)) { | |
793 | kfree(window); | |
4e8b0cf4 | 794 | remove_ddw(pdn); |
c8566780 | 795 | continue; |
4e8b0cf4 | 796 | } |
c8566780 MM |
797 | |
798 | window->device = pdn; | |
799 | window->prop = direct64; | |
800 | spin_lock(&direct_window_list_lock); | |
801 | list_add(&window->list, &direct_window_list); | |
802 | spin_unlock(&direct_window_list_lock); | |
4e8b0cf4 NA |
803 | } |
804 | ||
c8566780 | 805 | return 0; |
4e8b0cf4 | 806 | } |
c8566780 | 807 | machine_arch_initcall(pseries, find_existing_ddw_windows); |
4e8b0cf4 | 808 | |
b73a635f | 809 | static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail, |
4e8b0cf4 NA |
810 | struct ddw_query_response *query) |
811 | { | |
39baadbf | 812 | struct eeh_dev *edev; |
4e8b0cf4 NA |
813 | u32 cfg_addr; |
814 | u64 buid; | |
815 | int ret; | |
816 | ||
817 | /* | |
818 | * Get the config address and phb buid of the PE window. | |
819 | * Rely on eeh to retrieve this for us. | |
820 | * Retrieve them from the pci device, not the node with the | |
821 | * dma-window property | |
822 | */ | |
39baadbf GS |
823 | edev = pci_dev_to_eeh_dev(dev); |
824 | cfg_addr = edev->config_addr; | |
825 | if (edev->pe_config_addr) | |
826 | cfg_addr = edev->pe_config_addr; | |
827 | buid = edev->phb->buid; | |
828 | ||
b73a635f | 829 | ret = rtas_call(ddw_avail[0], 3, 5, (u32 *)query, |
4e8b0cf4 NA |
830 | cfg_addr, BUID_HI(buid), BUID_LO(buid)); |
831 | dev_info(&dev->dev, "ibm,query-pe-dma-windows(%x) %x %x %x" | |
b73a635f | 832 | " returned %d\n", ddw_avail[0], cfg_addr, BUID_HI(buid), |
4e8b0cf4 NA |
833 | BUID_LO(buid), ret); |
834 | return ret; | |
835 | } | |
836 | ||
b73a635f | 837 | static int create_ddw(struct pci_dev *dev, const u32 *ddw_avail, |
4e8b0cf4 NA |
838 | struct ddw_create_response *create, int page_shift, |
839 | int window_shift) | |
840 | { | |
39baadbf | 841 | struct eeh_dev *edev; |
4e8b0cf4 NA |
842 | u32 cfg_addr; |
843 | u64 buid; | |
844 | int ret; | |
845 | ||
846 | /* | |
847 | * Get the config address and phb buid of the PE window. | |
848 | * Rely on eeh to retrieve this for us. | |
849 | * Retrieve them from the pci device, not the node with the | |
850 | * dma-window property | |
851 | */ | |
39baadbf GS |
852 | edev = pci_dev_to_eeh_dev(dev); |
853 | cfg_addr = edev->config_addr; | |
854 | if (edev->pe_config_addr) | |
855 | cfg_addr = edev->pe_config_addr; | |
856 | buid = edev->phb->buid; | |
4e8b0cf4 NA |
857 | |
858 | do { | |
859 | /* extra outputs are LIOBN and dma-addr (hi, lo) */ | |
b73a635f | 860 | ret = rtas_call(ddw_avail[1], 5, 4, (u32 *)create, cfg_addr, |
4e8b0cf4 NA |
861 | BUID_HI(buid), BUID_LO(buid), page_shift, window_shift); |
862 | } while (rtas_busy_delay(ret)); | |
863 | dev_info(&dev->dev, | |
864 | "ibm,create-pe-dma-window(%x) %x %x %x %x %x returned %d " | |
b73a635f | 865 | "(liobn = 0x%x starting addr = %x %x)\n", ddw_avail[1], |
4e8b0cf4 NA |
866 | cfg_addr, BUID_HI(buid), BUID_LO(buid), page_shift, |
867 | window_shift, ret, create->liobn, create->addr_hi, create->addr_lo); | |
868 | ||
869 | return ret; | |
870 | } | |
871 | ||
872 | /* | |
873 | * If the PE supports dynamic dma windows, and there is space for a table | |
874 | * that can map all pages in a linear offset, then setup such a table, | |
875 | * and record the dma-offset in the struct device. | |
876 | * | |
877 | * dev: the pci device we are checking | |
878 | * pdn: the parent pe node with the ibm,dma_window property | |
879 | * Future: also check if we can remap the base window for our base page size | |
880 | * | |
881 | * returns the dma offset for use by dma_set_mask | |
882 | */ | |
883 | static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn) | |
884 | { | |
885 | int len, ret; | |
886 | struct ddw_query_response query; | |
887 | struct ddw_create_response create; | |
888 | int page_shift; | |
889 | u64 dma_addr, max_addr; | |
890 | struct device_node *dn; | |
b73a635f | 891 | const u32 *uninitialized_var(ddw_avail); |
4e8b0cf4 | 892 | struct direct_window *window; |
76730334 | 893 | struct property *win64; |
4e8b0cf4 NA |
894 | struct dynamic_dma_window_prop *ddwprop; |
895 | ||
896 | mutex_lock(&direct_window_init_mutex); | |
897 | ||
b73a635f | 898 | dma_addr = find_existing_ddw(pdn); |
4e8b0cf4 NA |
899 | if (dma_addr != 0) |
900 | goto out_unlock; | |
901 | ||
4e8b0cf4 NA |
902 | /* |
903 | * the ibm,ddw-applicable property holds the tokens for: | |
904 | * ibm,query-pe-dma-window | |
905 | * ibm,create-pe-dma-window | |
906 | * ibm,remove-pe-dma-window | |
907 | * for the given node in that order. | |
908 | * the property is actually in the parent, not the PE | |
909 | */ | |
b73a635f MM |
910 | ddw_avail = of_get_property(pdn, "ibm,ddw-applicable", &len); |
911 | if (!ddw_avail || len < 3 * sizeof(u32)) | |
4e8b0cf4 NA |
912 | goto out_unlock; |
913 | ||
914 | /* | |
915 | * Query if there is a second window of size to map the | |
916 | * whole partition. Query returns number of windows, largest | |
917 | * block assigned to PE (partition endpoint), and two bitmasks | |
918 | * of page sizes: supported and supported for migrate-dma. | |
919 | */ | |
920 | dn = pci_device_to_OF_node(dev); | |
b73a635f | 921 | ret = query_ddw(dev, ddw_avail, &query); |
4e8b0cf4 NA |
922 | if (ret != 0) |
923 | goto out_unlock; | |
924 | ||
925 | if (query.windows_available == 0) { | |
926 | /* | |
927 | * no additional windows are available for this device. | |
928 | * We might be able to reallocate the existing window, | |
929 | * trading in for a larger page size. | |
930 | */ | |
931 | dev_dbg(&dev->dev, "no free dynamic windows"); | |
932 | goto out_unlock; | |
933 | } | |
934 | if (query.page_size & 4) { | |
935 | page_shift = 24; /* 16MB */ | |
936 | } else if (query.page_size & 2) { | |
937 | page_shift = 16; /* 64kB */ | |
938 | } else if (query.page_size & 1) { | |
939 | page_shift = 12; /* 4kB */ | |
940 | } else { | |
941 | dev_dbg(&dev->dev, "no supported direct page size in mask %x", | |
942 | query.page_size); | |
943 | goto out_unlock; | |
944 | } | |
945 | /* verify the window * number of ptes will map the partition */ | |
946 | /* check largest block * page size > max memory hotplug addr */ | |
947 | max_addr = memory_hotplug_max(); | |
948 | if (query.largest_available_block < (max_addr >> page_shift)) { | |
949 | dev_dbg(&dev->dev, "can't map partiton max 0x%llx with %u " | |
950 | "%llu-sized pages\n", max_addr, query.largest_available_block, | |
951 | 1ULL << page_shift); | |
952 | goto out_unlock; | |
953 | } | |
954 | len = order_base_2(max_addr); | |
955 | win64 = kzalloc(sizeof(struct property), GFP_KERNEL); | |
956 | if (!win64) { | |
957 | dev_info(&dev->dev, | |
958 | "couldn't allocate property for 64bit dma window\n"); | |
959 | goto out_unlock; | |
960 | } | |
961 | win64->name = kstrdup(DIRECT64_PROPNAME, GFP_KERNEL); | |
962 | win64->value = ddwprop = kmalloc(sizeof(*ddwprop), GFP_KERNEL); | |
76730334 | 963 | win64->length = sizeof(*ddwprop); |
4e8b0cf4 NA |
964 | if (!win64->name || !win64->value) { |
965 | dev_info(&dev->dev, | |
966 | "couldn't allocate property name and value\n"); | |
967 | goto out_free_prop; | |
968 | } | |
969 | ||
b73a635f | 970 | ret = create_ddw(dev, ddw_avail, &create, page_shift, len); |
4e8b0cf4 NA |
971 | if (ret != 0) |
972 | goto out_free_prop; | |
973 | ||
974 | ddwprop->liobn = cpu_to_be32(create.liobn); | |
975 | ddwprop->dma_base = cpu_to_be64(of_read_number(&create.addr_hi, 2)); | |
976 | ddwprop->tce_shift = cpu_to_be32(page_shift); | |
977 | ddwprop->window_shift = cpu_to_be32(len); | |
978 | ||
979 | dev_dbg(&dev->dev, "created tce table LIOBN 0x%x for %s\n", | |
980 | create.liobn, dn->full_name); | |
981 | ||
982 | window = kzalloc(sizeof(*window), GFP_KERNEL); | |
983 | if (!window) | |
984 | goto out_clear_window; | |
985 | ||
986 | ret = walk_system_ram_range(0, memblock_end_of_DRAM() >> PAGE_SHIFT, | |
987 | win64->value, tce_setrange_multi_pSeriesLP_walk); | |
988 | if (ret) { | |
989 | dev_info(&dev->dev, "failed to map direct window for %s: %d\n", | |
990 | dn->full_name, ret); | |
7a19081f | 991 | goto out_free_window; |
4e8b0cf4 NA |
992 | } |
993 | ||
994 | ret = prom_add_property(pdn, win64); | |
995 | if (ret) { | |
996 | dev_err(&dev->dev, "unable to add dma window property for %s: %d", | |
997 | pdn->full_name, ret); | |
7a19081f | 998 | goto out_free_window; |
4e8b0cf4 NA |
999 | } |
1000 | ||
1001 | window->device = pdn; | |
1002 | window->prop = ddwprop; | |
1003 | spin_lock(&direct_window_list_lock); | |
1004 | list_add(&window->list, &direct_window_list); | |
1005 | spin_unlock(&direct_window_list_lock); | |
1006 | ||
1007 | dma_addr = of_read_number(&create.addr_hi, 2); | |
1008 | goto out_unlock; | |
1009 | ||
7a19081f JL |
1010 | out_free_window: |
1011 | kfree(window); | |
1012 | ||
4e8b0cf4 NA |
1013 | out_clear_window: |
1014 | remove_ddw(pdn); | |
1015 | ||
1016 | out_free_prop: | |
1017 | kfree(win64->name); | |
1018 | kfree(win64->value); | |
1019 | kfree(win64); | |
1020 | ||
1021 | out_unlock: | |
1022 | mutex_unlock(&direct_window_init_mutex); | |
1023 | return dma_addr; | |
1024 | } | |
1025 | ||
12d04eef | 1026 | static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) |
1da177e4 LT |
1027 | { |
1028 | struct device_node *pdn, *dn; | |
1029 | struct iommu_table *tbl; | |
954a46e2 | 1030 | const void *dma_window = NULL; |
1635317f | 1031 | struct pci_dn *pci; |
1da177e4 | 1032 | |
f7ebf352 | 1033 | pr_debug("pci_dma_dev_setup_pSeriesLP: %s\n", pci_name(dev)); |
12d04eef | 1034 | |
1da177e4 | 1035 | /* dev setup for LPAR is a little tricky, since the device tree might |
25985edc | 1036 | * contain the dma-window properties per-device and not necessarily |
1da177e4 LT |
1037 | * for the bus. So we need to search upwards in the tree until we |
1038 | * either hit a dma-window property, OR find a parent with a table | |
1039 | * already allocated. | |
1040 | */ | |
1041 | dn = pci_device_to_OF_node(dev); | |
f7ebf352 | 1042 | pr_debug(" node is %s\n", dn->full_name); |
5d2efba6 | 1043 | |
e07102db | 1044 | for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->iommu_table; |
1635317f | 1045 | pdn = pdn->parent) { |
e2eb6392 | 1046 | dma_window = of_get_property(pdn, "ibm,dma-window", NULL); |
1da177e4 LT |
1047 | if (dma_window) |
1048 | break; | |
1049 | } | |
1050 | ||
650f7b3b LV |
1051 | if (!pdn || !PCI_DN(pdn)) { |
1052 | printk(KERN_WARNING "pci_dma_dev_setup_pSeriesLP: " | |
1053 | "no DMA window found for pci dev=%s dn=%s\n", | |
74a7f084 | 1054 | pci_name(dev), of_node_full_name(dn)); |
650f7b3b LV |
1055 | return; |
1056 | } | |
f7ebf352 | 1057 | pr_debug(" parent is %s\n", pdn->full_name); |
12d04eef | 1058 | |
e07102db | 1059 | pci = PCI_DN(pdn); |
1635317f | 1060 | if (!pci->iommu_table) { |
7aa241fd | 1061 | tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, |
ca1588e7 | 1062 | pci->phb->node); |
b8c49def | 1063 | iommu_table_setparms_lpar(pci->phb, pdn, tbl, dma_window); |
ca1588e7 | 1064 | pci->iommu_table = iommu_init_table(tbl, pci->phb->node); |
f7ebf352 | 1065 | pr_debug(" created table: %p\n", pci->iommu_table); |
de113217 | 1066 | } else { |
f7ebf352 | 1067 | pr_debug(" found DMA window, table: %p\n", pci->iommu_table); |
1da177e4 LT |
1068 | } |
1069 | ||
738ef42e | 1070 | set_iommu_table_base(&dev->dev, pci->iommu_table); |
1da177e4 | 1071 | } |
4e8b0cf4 NA |
1072 | |
1073 | static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask) | |
1074 | { | |
1075 | bool ddw_enabled = false; | |
1076 | struct device_node *pdn, *dn; | |
1077 | struct pci_dev *pdev; | |
1078 | const void *dma_window = NULL; | |
1079 | u64 dma_offset; | |
1080 | ||
64ac822f | 1081 | if (!dev->dma_mask) |
4e8b0cf4 NA |
1082 | return -EIO; |
1083 | ||
64ac822f MM |
1084 | if (!dev_is_pci(dev)) |
1085 | goto check_mask; | |
1086 | ||
eb0dd411 NA |
1087 | pdev = to_pci_dev(dev); |
1088 | ||
4e8b0cf4 NA |
1089 | /* only attempt to use a new window if 64-bit DMA is requested */ |
1090 | if (!disable_ddw && dma_mask == DMA_BIT_MASK(64)) { | |
4e8b0cf4 NA |
1091 | dn = pci_device_to_OF_node(pdev); |
1092 | dev_dbg(dev, "node is %s\n", dn->full_name); | |
1093 | ||
1094 | /* | |
1095 | * the device tree might contain the dma-window properties | |
25985edc | 1096 | * per-device and not necessarily for the bus. So we need to |
4e8b0cf4 NA |
1097 | * search upwards in the tree until we either hit a dma-window |
1098 | * property, OR find a parent with a table already allocated. | |
1099 | */ | |
1100 | for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->iommu_table; | |
1101 | pdn = pdn->parent) { | |
1102 | dma_window = of_get_property(pdn, "ibm,dma-window", NULL); | |
1103 | if (dma_window) | |
1104 | break; | |
1105 | } | |
1106 | if (pdn && PCI_DN(pdn)) { | |
1107 | dma_offset = enable_ddw(pdev, pdn); | |
1108 | if (dma_offset != 0) { | |
1109 | dev_info(dev, "Using 64-bit direct DMA at offset %llx\n", dma_offset); | |
1110 | set_dma_offset(dev, dma_offset); | |
1111 | set_dma_ops(dev, &dma_direct_ops); | |
1112 | ddw_enabled = true; | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | ||
64ac822f MM |
1117 | /* fall back on iommu ops, restore table pointer with ops */ |
1118 | if (!ddw_enabled && get_dma_ops(dev) != &dma_iommu_ops) { | |
1119 | dev_info(dev, "Restoring 32-bit DMA via iommu\n"); | |
4e8b0cf4 | 1120 | set_dma_ops(dev, &dma_iommu_ops); |
eb0dd411 | 1121 | pci_dma_dev_setup_pSeriesLP(pdev); |
4e8b0cf4 NA |
1122 | } |
1123 | ||
64ac822f MM |
1124 | check_mask: |
1125 | if (!dma_supported(dev, dma_mask)) | |
1126 | return -EIO; | |
1127 | ||
4e8b0cf4 NA |
1128 | *dev->dma_mask = dma_mask; |
1129 | return 0; | |
1130 | } | |
1131 | ||
6a5c7be5 MM |
1132 | static u64 dma_get_required_mask_pSeriesLP(struct device *dev) |
1133 | { | |
1134 | if (!dev->dma_mask) | |
1135 | return 0; | |
1136 | ||
1137 | if (!disable_ddw && dev_is_pci(dev)) { | |
1138 | struct pci_dev *pdev = to_pci_dev(dev); | |
1139 | struct device_node *dn; | |
1140 | ||
1141 | dn = pci_device_to_OF_node(pdev); | |
1142 | ||
1143 | /* search upwards for ibm,dma-window */ | |
1144 | for (; dn && PCI_DN(dn) && !PCI_DN(dn)->iommu_table; | |
1145 | dn = dn->parent) | |
1146 | if (of_get_property(dn, "ibm,dma-window", NULL)) | |
1147 | break; | |
1148 | /* if there is a ibm,ddw-applicable property require 64 bits */ | |
1149 | if (dn && PCI_DN(dn) && | |
1150 | of_get_property(dn, "ibm,ddw-applicable", NULL)) | |
1151 | return DMA_BIT_MASK(64); | |
1152 | } | |
1153 | ||
d24f9c69 | 1154 | return dma_iommu_ops.get_required_mask(dev); |
6a5c7be5 MM |
1155 | } |
1156 | ||
bed59275 SR |
1157 | #else /* CONFIG_PCI */ |
1158 | #define pci_dma_bus_setup_pSeries NULL | |
1159 | #define pci_dma_dev_setup_pSeries NULL | |
1160 | #define pci_dma_bus_setup_pSeriesLP NULL | |
1161 | #define pci_dma_dev_setup_pSeriesLP NULL | |
4e8b0cf4 | 1162 | #define dma_set_mask_pSeriesLP NULL |
6a5c7be5 | 1163 | #define dma_get_required_mask_pSeriesLP NULL |
bed59275 SR |
1164 | #endif /* !CONFIG_PCI */ |
1165 | ||
4e8b0cf4 NA |
1166 | static int iommu_mem_notifier(struct notifier_block *nb, unsigned long action, |
1167 | void *data) | |
1168 | { | |
1169 | struct direct_window *window; | |
1170 | struct memory_notify *arg = data; | |
1171 | int ret = 0; | |
1172 | ||
1173 | switch (action) { | |
1174 | case MEM_GOING_ONLINE: | |
1175 | spin_lock(&direct_window_list_lock); | |
1176 | list_for_each_entry(window, &direct_window_list, list) { | |
1177 | ret |= tce_setrange_multi_pSeriesLP(arg->start_pfn, | |
1178 | arg->nr_pages, window->prop); | |
1179 | /* XXX log error */ | |
1180 | } | |
1181 | spin_unlock(&direct_window_list_lock); | |
1182 | break; | |
1183 | case MEM_CANCEL_ONLINE: | |
1184 | case MEM_OFFLINE: | |
1185 | spin_lock(&direct_window_list_lock); | |
1186 | list_for_each_entry(window, &direct_window_list, list) { | |
1187 | ret |= tce_clearrange_multi_pSeriesLP(arg->start_pfn, | |
1188 | arg->nr_pages, window->prop); | |
1189 | /* XXX log error */ | |
1190 | } | |
1191 | spin_unlock(&direct_window_list_lock); | |
1192 | break; | |
1193 | default: | |
1194 | break; | |
1195 | } | |
1196 | if (ret && action != MEM_CANCEL_ONLINE) | |
1197 | return NOTIFY_BAD; | |
1198 | ||
1199 | return NOTIFY_OK; | |
1200 | } | |
1201 | ||
1202 | static struct notifier_block iommu_mem_nb = { | |
1203 | .notifier_call = iommu_mem_notifier, | |
1204 | }; | |
1205 | ||
bed59275 SR |
1206 | static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node) |
1207 | { | |
1208 | int err = NOTIFY_OK; | |
1209 | struct device_node *np = node; | |
1210 | struct pci_dn *pci = PCI_DN(np); | |
4e8b0cf4 | 1211 | struct direct_window *window; |
bed59275 SR |
1212 | |
1213 | switch (action) { | |
1214 | case PSERIES_RECONFIG_REMOVE: | |
7372cfb8 | 1215 | if (pci && pci->iommu_table) |
68d315f5 | 1216 | iommu_free_table(pci->iommu_table, np->full_name); |
4e8b0cf4 NA |
1217 | |
1218 | spin_lock(&direct_window_list_lock); | |
1219 | list_for_each_entry(window, &direct_window_list, list) { | |
1220 | if (window->device == np) { | |
1221 | list_del(&window->list); | |
1222 | kfree(window); | |
1223 | break; | |
1224 | } | |
1225 | } | |
1226 | spin_unlock(&direct_window_list_lock); | |
1227 | ||
1228 | /* | |
1229 | * Because the notifier runs after isolation of the | |
1230 | * slot, we are guaranteed any DMA window has already | |
1231 | * been revoked and the TCEs have been marked invalid, | |
1232 | * so we don't need a call to remove_ddw(np). However, | |
1233 | * if an additional notifier action is added before the | |
1234 | * isolate call, we should update this code for | |
1235 | * completeness with such a call. | |
1236 | */ | |
bed59275 SR |
1237 | break; |
1238 | default: | |
1239 | err = NOTIFY_DONE; | |
1240 | break; | |
1241 | } | |
1242 | return err; | |
1243 | } | |
1244 | ||
1245 | static struct notifier_block iommu_reconfig_nb = { | |
1246 | .notifier_call = iommu_reconfig_notifier, | |
1247 | }; | |
1da177e4 | 1248 | |
1da177e4 LT |
1249 | /* These are called very early. */ |
1250 | void iommu_init_early_pSeries(void) | |
1251 | { | |
a8daac8a | 1252 | if (of_chosen && of_get_property(of_chosen, "linux,iommu-off", NULL)) |
1da177e4 | 1253 | return; |
1da177e4 | 1254 | |
57cfb814 | 1255 | if (firmware_has_feature(FW_FEATURE_LPAR)) { |
1ababe11 | 1256 | if (firmware_has_feature(FW_FEATURE_MULTITCE)) { |
1da177e4 LT |
1257 | ppc_md.tce_build = tce_buildmulti_pSeriesLP; |
1258 | ppc_md.tce_free = tce_freemulti_pSeriesLP; | |
1259 | } else { | |
1260 | ppc_md.tce_build = tce_build_pSeriesLP; | |
1261 | ppc_md.tce_free = tce_free_pSeriesLP; | |
1262 | } | |
5f50867b | 1263 | ppc_md.tce_get = tce_get_pSeriesLP; |
12d04eef BH |
1264 | ppc_md.pci_dma_bus_setup = pci_dma_bus_setup_pSeriesLP; |
1265 | ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_pSeriesLP; | |
4e8b0cf4 | 1266 | ppc_md.dma_set_mask = dma_set_mask_pSeriesLP; |
6a5c7be5 | 1267 | ppc_md.dma_get_required_mask = dma_get_required_mask_pSeriesLP; |
1da177e4 LT |
1268 | } else { |
1269 | ppc_md.tce_build = tce_build_pSeries; | |
1270 | ppc_md.tce_free = tce_free_pSeries; | |
5f50867b | 1271 | ppc_md.tce_get = tce_get_pseries; |
12d04eef BH |
1272 | ppc_md.pci_dma_bus_setup = pci_dma_bus_setup_pSeries; |
1273 | ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_pSeries; | |
1da177e4 LT |
1274 | } |
1275 | ||
1276 | ||
1277 | pSeries_reconfig_notifier_register(&iommu_reconfig_nb); | |
4e8b0cf4 | 1278 | register_memory_notifier(&iommu_mem_nb); |
1da177e4 | 1279 | |
98747770 | 1280 | set_pci_dma_ops(&dma_iommu_ops); |
1da177e4 LT |
1281 | } |
1282 | ||
4e89a2d8 WS |
1283 | static int __init disable_multitce(char *str) |
1284 | { | |
1285 | if (strcmp(str, "off") == 0 && | |
1286 | firmware_has_feature(FW_FEATURE_LPAR) && | |
1287 | firmware_has_feature(FW_FEATURE_MULTITCE)) { | |
1288 | printk(KERN_INFO "Disabling MULTITCE firmware feature\n"); | |
1289 | ppc_md.tce_build = tce_build_pSeriesLP; | |
1290 | ppc_md.tce_free = tce_free_pSeriesLP; | |
1291 | powerpc_firmware_features &= ~FW_FEATURE_MULTITCE; | |
1292 | } | |
1293 | return 1; | |
1294 | } | |
1295 | ||
1296 | __setup("multitce=", disable_multitce); |