Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
rsparser.c
Go to the documentation of this file.
1 /*
2  * pnpacpi -- PnP ACPI driver
3  *
4  * Copyright (c) 2004 Matthieu Castet <[email protected]>
5  * Copyright (c) 2004 Li Shaohua <[email protected]>
6  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7  * Bjorn Helgaas <[email protected]>
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU General Public License as published by the
11  * Free Software Foundation; either version 2, or (at your option) any
12  * later version.
13  *
14  * This program is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22  */
23 #include <linux/kernel.h>
24 #include <linux/acpi.h>
25 #include <linux/pci.h>
26 #include <linux/pnp.h>
27 #include <linux/slab.h>
28 #include "../base.h"
29 #include "pnpacpi.h"
30 
31 #ifdef CONFIG_IA64
32 #define valid_IRQ(i) (1)
33 #else
34 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
35 #endif
36 
37 /*
38  * Allocated Resources
39  */
40 static int irq_flags(int triggering, int polarity, int shareable)
41 {
42  int flags;
43 
44  if (triggering == ACPI_LEVEL_SENSITIVE) {
45  if (polarity == ACPI_ACTIVE_LOW)
46  flags = IORESOURCE_IRQ_LOWLEVEL;
47  else
48  flags = IORESOURCE_IRQ_HIGHLEVEL;
49  } else {
50  if (polarity == ACPI_ACTIVE_LOW)
51  flags = IORESOURCE_IRQ_LOWEDGE;
52  else
53  flags = IORESOURCE_IRQ_HIGHEDGE;
54  }
55 
56  if (shareable == ACPI_SHARED)
57  flags |= IORESOURCE_IRQ_SHAREABLE;
58 
59  return flags;
60 }
61 
62 static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
63  int *polarity, int *shareable)
64 {
65  switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
66  IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) {
67  case IORESOURCE_IRQ_LOWLEVEL:
68  *triggering = ACPI_LEVEL_SENSITIVE;
69  *polarity = ACPI_ACTIVE_LOW;
70  break;
71  case IORESOURCE_IRQ_HIGHLEVEL:
72  *triggering = ACPI_LEVEL_SENSITIVE;
73  *polarity = ACPI_ACTIVE_HIGH;
74  break;
75  case IORESOURCE_IRQ_LOWEDGE:
76  *triggering = ACPI_EDGE_SENSITIVE;
77  *polarity = ACPI_ACTIVE_LOW;
78  break;
79  case IORESOURCE_IRQ_HIGHEDGE:
80  *triggering = ACPI_EDGE_SENSITIVE;
81  *polarity = ACPI_ACTIVE_HIGH;
82  break;
83  default:
84  dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
85  flags);
86  *triggering = ACPI_EDGE_SENSITIVE;
87  *polarity = ACPI_ACTIVE_HIGH;
88  break;
89  }
90 
91  if (flags & IORESOURCE_IRQ_SHAREABLE)
92  *shareable = ACPI_SHARED;
93  else
94  *shareable = ACPI_EXCLUSIVE;
95 }
96 
97 static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev,
98  u32 gsi, int triggering,
99  int polarity, int shareable)
100 {
101  int irq, flags;
102  int p, t;
103 
104  if (!valid_IRQ(gsi)) {
105  pnp_add_irq_resource(dev, gsi, IORESOURCE_DISABLED);
106  return;
107  }
108 
109  /*
110  * in IO-APIC mode, use overrided attribute. Two reasons:
111  * 1. BIOS bug in DSDT
112  * 2. BIOS uses IO-APIC mode Interrupt Source Override
113  */
114  if (!acpi_get_override_irq(gsi, &t, &p)) {
115  t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
116  p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
117 
118  if (triggering != t || polarity != p) {
119  dev_warn(&dev->dev, "IRQ %d override to %s, %s\n",
120  gsi, t ? "edge":"level", p ? "low":"high");
121  triggering = t;
122  polarity = p;
123  }
124  }
125 
126  flags = irq_flags(triggering, polarity, shareable);
127  irq = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
128  if (irq >= 0)
129  pcibios_penalize_isa_irq(irq, 1);
130  else
131  flags |= IORESOURCE_DISABLED;
132 
133  pnp_add_irq_resource(dev, irq, flags);
134 }
135 
136 static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
137  int transfer)
138 {
139  int flags = 0;
140 
141  if (bus_master)
142  flags |= IORESOURCE_DMA_MASTER;
143  switch (type) {
144  case ACPI_COMPATIBILITY:
145  flags |= IORESOURCE_DMA_COMPATIBLE;
146  break;
147  case ACPI_TYPE_A:
148  flags |= IORESOURCE_DMA_TYPEA;
149  break;
150  case ACPI_TYPE_B:
151  flags |= IORESOURCE_DMA_TYPEB;
152  break;
153  case ACPI_TYPE_F:
154  flags |= IORESOURCE_DMA_TYPEF;
155  break;
156  default:
157  /* Set a default value ? */
158  flags |= IORESOURCE_DMA_COMPATIBLE;
159  dev_err(&dev->dev, "invalid DMA type %d\n", type);
160  }
161  switch (transfer) {
162  case ACPI_TRANSFER_8:
163  flags |= IORESOURCE_DMA_8BIT;
164  break;
165  case ACPI_TRANSFER_8_16:
166  flags |= IORESOURCE_DMA_8AND16BIT;
167  break;
168  case ACPI_TRANSFER_16:
169  flags |= IORESOURCE_DMA_16BIT;
170  break;
171  default:
172  /* Set a default value ? */
173  flags |= IORESOURCE_DMA_8AND16BIT;
174  dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
175  }
176 
177  return flags;
178 }
179 
180 static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
181  u64 len, int io_decode,
182  int window)
183 {
184  int flags = 0;
185  u64 end = start + len - 1;
186 
187  if (io_decode == ACPI_DECODE_16)
188  flags |= IORESOURCE_IO_16BIT_ADDR;
189  if (len == 0 || end >= 0x10003)
190  flags |= IORESOURCE_DISABLED;
191  if (window)
192  flags |= IORESOURCE_WINDOW;
193 
194  pnp_add_io_resource(dev, start, end, flags);
195 }
196 
197 /*
198  * Device CSRs that do not appear in PCI config space should be described
199  * via ACPI. This would normally be done with Address Space Descriptors
200  * marked as "consumer-only," but old versions of Windows and Linux ignore
201  * the producer/consumer flag, so HP invented a vendor-defined resource to
202  * describe the location and size of CSR space.
203  */
204 static struct acpi_vendor_uuid hp_ccsr_uuid = {
205  .subtype = 2,
206  .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
207  0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
208 };
209 
210 static int vendor_resource_matches(struct pnp_dev *dev,
211  struct acpi_resource_vendor_typed *vendor,
212  struct acpi_vendor_uuid *match,
213  int expected_len)
214 {
215  int uuid_len = sizeof(vendor->uuid);
216  u8 uuid_subtype = vendor->uuid_subtype;
217  u8 *uuid = vendor->uuid;
218  int actual_len;
219 
220  /* byte_length includes uuid_subtype and uuid */
221  actual_len = vendor->byte_length - uuid_len - 1;
222 
223  if (uuid_subtype == match->subtype &&
224  uuid_len == sizeof(match->data) &&
225  memcmp(uuid, match->data, uuid_len) == 0) {
226  if (expected_len && expected_len != actual_len) {
227  dev_err(&dev->dev, "wrong vendor descriptor size; "
228  "expected %d, found %d bytes\n",
229  expected_len, actual_len);
230  return 0;
231  }
232 
233  return 1;
234  }
235 
236  return 0;
237 }
238 
239 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
240  struct acpi_resource_vendor_typed *vendor)
241 {
242  if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
243  u64 start, length;
244 
245  memcpy(&start, vendor->byte_data, sizeof(start));
246  memcpy(&length, vendor->byte_data + 8, sizeof(length));
247 
248  pnp_add_mem_resource(dev, start, start + length - 1, 0);
249  }
250 }
251 
252 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
253  u64 start, u64 len,
254  int write_protect, int window)
255 {
256  int flags = 0;
257  u64 end = start + len - 1;
258 
259  if (len == 0)
260  flags |= IORESOURCE_DISABLED;
261  if (write_protect == ACPI_READ_WRITE_MEMORY)
262  flags |= IORESOURCE_MEM_WRITEABLE;
263  if (window)
264  flags |= IORESOURCE_WINDOW;
265 
266  pnp_add_mem_resource(dev, start, end, flags);
267 }
268 
269 static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
270  u64 start, u64 len)
271 {
272  u64 end = start + len - 1;
273 
274  pnp_add_bus_resource(dev, start, end);
275 }
276 
277 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
278  struct acpi_resource *res)
279 {
280  struct acpi_resource_address64 addr, *p = &addr;
281  acpi_status status;
282  int window;
283  u64 len;
284 
285  status = acpi_resource_to_address64(res, p);
286  if (!ACPI_SUCCESS(status)) {
287  dev_warn(&dev->dev, "failed to convert resource type %d\n",
288  res->type);
289  return;
290  }
291 
292  /* Windows apparently computes length rather than using _LEN */
293  len = p->maximum - p->minimum + 1;
294  window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
295 
296  if (p->resource_type == ACPI_MEMORY_RANGE)
297  pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
298  p->info.mem.write_protect, window);
299  else if (p->resource_type == ACPI_IO_RANGE)
300  pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
301  p->granularity == 0xfff ? ACPI_DECODE_10 :
302  ACPI_DECODE_16, window);
303  else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
304  pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
305 }
306 
307 static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
308  struct acpi_resource *res)
309 {
310  struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
311  int window;
312  u64 len;
313 
314  /* Windows apparently computes length rather than using _LEN */
315  len = p->maximum - p->minimum + 1;
316  window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
317 
318  if (p->resource_type == ACPI_MEMORY_RANGE)
319  pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
320  p->info.mem.write_protect, window);
321  else if (p->resource_type == ACPI_IO_RANGE)
322  pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
323  p->granularity == 0xfff ? ACPI_DECODE_10 :
324  ACPI_DECODE_16, window);
325  else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
326  pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
327 }
328 
329 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
330  void *data)
331 {
332  struct pnp_dev *dev = data;
333  struct acpi_resource_irq *irq;
334  struct acpi_resource_dma *dma;
335  struct acpi_resource_io *io;
336  struct acpi_resource_fixed_io *fixed_io;
337  struct acpi_resource_vendor_typed *vendor_typed;
338  struct acpi_resource_memory24 *memory24;
339  struct acpi_resource_memory32 *memory32;
340  struct acpi_resource_fixed_memory32 *fixed_memory32;
341  struct acpi_resource_extended_irq *extended_irq;
342  int i, flags;
343 
344  switch (res->type) {
345  case ACPI_RESOURCE_TYPE_IRQ:
346  /*
347  * Per spec, only one interrupt per descriptor is allowed in
348  * _CRS, but some firmware violates this, so parse them all.
349  */
350  irq = &res->data.irq;
351  if (irq->interrupt_count == 0)
352  pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
353  else {
354  for (i = 0; i < irq->interrupt_count; i++) {
355  pnpacpi_parse_allocated_irqresource(dev,
356  irq->interrupts[i],
357  irq->triggering,
358  irq->polarity,
359  irq->sharable);
360  }
361 
362  /*
363  * The IRQ encoder puts a single interrupt in each
364  * descriptor, so if a _CRS descriptor has more than
365  * one interrupt, we won't be able to re-encode it.
366  */
367  if (pnp_can_write(dev) && irq->interrupt_count > 1) {
368  dev_warn(&dev->dev, "multiple interrupts in "
369  "_CRS descriptor; configuration can't "
370  "be changed\n");
371  dev->capabilities &= ~PNP_WRITE;
372  }
373  }
374  break;
375 
376  case ACPI_RESOURCE_TYPE_DMA:
377  dma = &res->data.dma;
378  if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
379  flags = dma_flags(dev, dma->type, dma->bus_master,
380  dma->transfer);
381  else
382  flags = IORESOURCE_DISABLED;
383  pnp_add_dma_resource(dev, dma->channels[0], flags);
384  break;
385 
386  case ACPI_RESOURCE_TYPE_IO:
387  io = &res->data.io;
388  pnpacpi_parse_allocated_ioresource(dev,
389  io->minimum,
390  io->address_length,
391  io->io_decode, 0);
392  break;
393 
394  case ACPI_RESOURCE_TYPE_START_DEPENDENT:
395  case ACPI_RESOURCE_TYPE_END_DEPENDENT:
396  break;
397 
398  case ACPI_RESOURCE_TYPE_FIXED_IO:
399  fixed_io = &res->data.fixed_io;
400  pnpacpi_parse_allocated_ioresource(dev,
401  fixed_io->address,
402  fixed_io->address_length,
403  ACPI_DECODE_10, 0);
404  break;
405 
406  case ACPI_RESOURCE_TYPE_VENDOR:
407  vendor_typed = &res->data.vendor_typed;
408  pnpacpi_parse_allocated_vendor(dev, vendor_typed);
409  break;
410 
411  case ACPI_RESOURCE_TYPE_END_TAG:
412  break;
413 
414  case ACPI_RESOURCE_TYPE_MEMORY24:
415  memory24 = &res->data.memory24;
416  pnpacpi_parse_allocated_memresource(dev,
417  memory24->minimum,
418  memory24->address_length,
419  memory24->write_protect, 0);
420  break;
421  case ACPI_RESOURCE_TYPE_MEMORY32:
422  memory32 = &res->data.memory32;
423  pnpacpi_parse_allocated_memresource(dev,
424  memory32->minimum,
425  memory32->address_length,
426  memory32->write_protect, 0);
427  break;
428  case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
429  fixed_memory32 = &res->data.fixed_memory32;
430  pnpacpi_parse_allocated_memresource(dev,
431  fixed_memory32->address,
432  fixed_memory32->address_length,
433  fixed_memory32->write_protect, 0);
434  break;
435  case ACPI_RESOURCE_TYPE_ADDRESS16:
436  case ACPI_RESOURCE_TYPE_ADDRESS32:
437  case ACPI_RESOURCE_TYPE_ADDRESS64:
438  pnpacpi_parse_allocated_address_space(dev, res);
439  break;
440 
441  case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
442  pnpacpi_parse_allocated_ext_address_space(dev, res);
443  break;
444 
445  case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
446  extended_irq = &res->data.extended_irq;
447 
448  if (extended_irq->interrupt_count == 0)
449  pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
450  else {
451  for (i = 0; i < extended_irq->interrupt_count; i++) {
452  pnpacpi_parse_allocated_irqresource(dev,
453  extended_irq->interrupts[i],
454  extended_irq->triggering,
455  extended_irq->polarity,
456  extended_irq->sharable);
457  }
458 
459  /*
460  * The IRQ encoder puts a single interrupt in each
461  * descriptor, so if a _CRS descriptor has more than
462  * one interrupt, we won't be able to re-encode it.
463  */
464  if (pnp_can_write(dev) &&
465  extended_irq->interrupt_count > 1) {
466  dev_warn(&dev->dev, "multiple interrupts in "
467  "_CRS descriptor; configuration can't "
468  "be changed\n");
469  dev->capabilities &= ~PNP_WRITE;
470  }
471  }
472  break;
473 
474  case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
475  break;
476 
477  default:
478  dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
479  res->type);
480  return AE_ERROR;
481  }
482 
483  return AE_OK;
484 }
485 
486 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
487 {
488  struct acpi_device *acpi_dev = dev->data;
489  acpi_handle handle = acpi_dev->handle;
490  acpi_status status;
491 
492  pnp_dbg(&dev->dev, "parse allocated resources\n");
493 
494  pnp_init_resources(dev);
495 
496  status = acpi_walk_resources(handle, METHOD_NAME__CRS,
497  pnpacpi_allocated_resource, dev);
498 
499  if (ACPI_FAILURE(status)) {
500  if (status != AE_NOT_FOUND)
501  dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
502  return -EPERM;
503  }
504  return 0;
505 }
506 
507 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
508  unsigned int option_flags,
509  struct acpi_resource_dma *p)
510 {
511  int i;
512  unsigned char map = 0, flags;
513 
514  for (i = 0; i < p->channel_count; i++)
515  map |= 1 << p->channels[i];
516 
517  flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
518  pnp_register_dma_resource(dev, option_flags, map, flags);
519 }
520 
521 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
522  unsigned int option_flags,
523  struct acpi_resource_irq *p)
524 {
525  int i;
526  pnp_irq_mask_t map;
527  unsigned char flags;
528 
529  bitmap_zero(map.bits, PNP_IRQ_NR);
530  for (i = 0; i < p->interrupt_count; i++)
531  if (p->interrupts[i])
532  __set_bit(p->interrupts[i], map.bits);
533 
534  flags = irq_flags(p->triggering, p->polarity, p->sharable);
535  pnp_register_irq_resource(dev, option_flags, &map, flags);
536 }
537 
538 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
539  unsigned int option_flags,
540  struct acpi_resource_extended_irq *p)
541 {
542  int i;
543  pnp_irq_mask_t map;
544  unsigned char flags;
545 
546  bitmap_zero(map.bits, PNP_IRQ_NR);
547  for (i = 0; i < p->interrupt_count; i++) {
548  if (p->interrupts[i]) {
549  if (p->interrupts[i] < PNP_IRQ_NR)
550  __set_bit(p->interrupts[i], map.bits);
551  else
552  dev_err(&dev->dev, "ignoring IRQ %d option "
553  "(too large for %d entry bitmap)\n",
554  p->interrupts[i], PNP_IRQ_NR);
555  }
556  }
557 
558  flags = irq_flags(p->triggering, p->polarity, p->sharable);
559  pnp_register_irq_resource(dev, option_flags, &map, flags);
560 }
561 
562 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
563  unsigned int option_flags,
564  struct acpi_resource_io *io)
565 {
566  unsigned char flags = 0;
567 
568  if (io->io_decode == ACPI_DECODE_16)
569  flags = IORESOURCE_IO_16BIT_ADDR;
570  pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
571  io->alignment, io->address_length, flags);
572 }
573 
574 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
575  unsigned int option_flags,
576  struct acpi_resource_fixed_io *io)
577 {
578  pnp_register_port_resource(dev, option_flags, io->address, io->address,
579  0, io->address_length, IORESOURCE_IO_FIXED);
580 }
581 
582 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
583  unsigned int option_flags,
584  struct acpi_resource_memory24 *p)
585 {
586  unsigned char flags = 0;
587 
588  if (p->write_protect == ACPI_READ_WRITE_MEMORY)
589  flags = IORESOURCE_MEM_WRITEABLE;
590  pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
591  p->alignment, p->address_length, flags);
592 }
593 
594 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
595  unsigned int option_flags,
596  struct acpi_resource_memory32 *p)
597 {
598  unsigned char flags = 0;
599 
600  if (p->write_protect == ACPI_READ_WRITE_MEMORY)
601  flags = IORESOURCE_MEM_WRITEABLE;
602  pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
603  p->alignment, p->address_length, flags);
604 }
605 
606 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
607  unsigned int option_flags,
608  struct acpi_resource_fixed_memory32 *p)
609 {
610  unsigned char flags = 0;
611 
612  if (p->write_protect == ACPI_READ_WRITE_MEMORY)
613  flags = IORESOURCE_MEM_WRITEABLE;
614  pnp_register_mem_resource(dev, option_flags, p->address, p->address,
615  0, p->address_length, flags);
616 }
617 
618 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
619  unsigned int option_flags,
620  struct acpi_resource *r)
621 {
622  struct acpi_resource_address64 addr, *p = &addr;
623  acpi_status status;
624  unsigned char flags = 0;
625 
626  status = acpi_resource_to_address64(r, p);
627  if (ACPI_FAILURE(status)) {
628  dev_warn(&dev->dev, "can't convert resource type %d\n",
629  r->type);
630  return;
631  }
632 
633  if (p->resource_type == ACPI_MEMORY_RANGE) {
634  if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
635  flags = IORESOURCE_MEM_WRITEABLE;
636  pnp_register_mem_resource(dev, option_flags, p->minimum,
637  p->minimum, 0, p->address_length,
638  flags);
639  } else if (p->resource_type == ACPI_IO_RANGE)
640  pnp_register_port_resource(dev, option_flags, p->minimum,
641  p->minimum, 0, p->address_length,
642  IORESOURCE_IO_FIXED);
643 }
644 
645 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
646  unsigned int option_flags,
647  struct acpi_resource *r)
648 {
649  struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
650  unsigned char flags = 0;
651 
652  if (p->resource_type == ACPI_MEMORY_RANGE) {
653  if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
654  flags = IORESOURCE_MEM_WRITEABLE;
655  pnp_register_mem_resource(dev, option_flags, p->minimum,
656  p->minimum, 0, p->address_length,
657  flags);
658  } else if (p->resource_type == ACPI_IO_RANGE)
659  pnp_register_port_resource(dev, option_flags, p->minimum,
660  p->minimum, 0, p->address_length,
661  IORESOURCE_IO_FIXED);
662 }
663 
664 struct acpipnp_parse_option_s {
665  struct pnp_dev *dev;
666  unsigned int option_flags;
667 };
668 
669 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
670  void *data)
671 {
672  int priority;
673  struct acpipnp_parse_option_s *parse_data = data;
674  struct pnp_dev *dev = parse_data->dev;
675  unsigned int option_flags = parse_data->option_flags;
676 
677  switch (res->type) {
678  case ACPI_RESOURCE_TYPE_IRQ:
679  pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
680  break;
681 
682  case ACPI_RESOURCE_TYPE_DMA:
683  pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
684  break;
685 
686  case ACPI_RESOURCE_TYPE_START_DEPENDENT:
687  switch (res->data.start_dpf.compatibility_priority) {
688  case ACPI_GOOD_CONFIGURATION:
689  priority = PNP_RES_PRIORITY_PREFERRED;
690  break;
691 
692  case ACPI_ACCEPTABLE_CONFIGURATION:
693  priority = PNP_RES_PRIORITY_ACCEPTABLE;
694  break;
695 
696  case ACPI_SUB_OPTIMAL_CONFIGURATION:
697  priority = PNP_RES_PRIORITY_FUNCTIONAL;
698  break;
699  default:
700  priority = PNP_RES_PRIORITY_INVALID;
701  break;
702  }
703  parse_data->option_flags = pnp_new_dependent_set(dev, priority);
704  break;
705 
706  case ACPI_RESOURCE_TYPE_END_DEPENDENT:
707  parse_data->option_flags = 0;
708  break;
709 
710  case ACPI_RESOURCE_TYPE_IO:
711  pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
712  break;
713 
714  case ACPI_RESOURCE_TYPE_FIXED_IO:
715  pnpacpi_parse_fixed_port_option(dev, option_flags,
716  &res->data.fixed_io);
717  break;
718 
719  case ACPI_RESOURCE_TYPE_VENDOR:
720  case ACPI_RESOURCE_TYPE_END_TAG:
721  break;
722 
723  case ACPI_RESOURCE_TYPE_MEMORY24:
724  pnpacpi_parse_mem24_option(dev, option_flags,
725  &res->data.memory24);
726  break;
727 
728  case ACPI_RESOURCE_TYPE_MEMORY32:
729  pnpacpi_parse_mem32_option(dev, option_flags,
730  &res->data.memory32);
731  break;
732 
733  case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
734  pnpacpi_parse_fixed_mem32_option(dev, option_flags,
735  &res->data.fixed_memory32);
736  break;
737 
738  case ACPI_RESOURCE_TYPE_ADDRESS16:
739  case ACPI_RESOURCE_TYPE_ADDRESS32:
740  case ACPI_RESOURCE_TYPE_ADDRESS64:
741  pnpacpi_parse_address_option(dev, option_flags, res);
742  break;
743 
744  case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
745  pnpacpi_parse_ext_address_option(dev, option_flags, res);
746  break;
747 
748  case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
749  pnpacpi_parse_ext_irq_option(dev, option_flags,
750  &res->data.extended_irq);
751  break;
752 
753  case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
754  break;
755 
756  default:
757  dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
758  res->type);
759  return AE_ERROR;
760  }
761 
762  return AE_OK;
763 }
764 
765 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
766 {
767  struct acpi_device *acpi_dev = dev->data;
768  acpi_handle handle = acpi_dev->handle;
769  acpi_status status;
770  struct acpipnp_parse_option_s parse_data;
771 
772  pnp_dbg(&dev->dev, "parse resource options\n");
773 
774  parse_data.dev = dev;
775  parse_data.option_flags = 0;
776 
777  status = acpi_walk_resources(handle, METHOD_NAME__PRS,
778  pnpacpi_option_resource, &parse_data);
779 
780  if (ACPI_FAILURE(status)) {
781  if (status != AE_NOT_FOUND)
782  dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
783  return -EPERM;
784  }
785  return 0;
786 }
787 
788 static int pnpacpi_supported_resource(struct acpi_resource *res)
789 {
790  switch (res->type) {
791  case ACPI_RESOURCE_TYPE_IRQ:
792  case ACPI_RESOURCE_TYPE_DMA:
793  case ACPI_RESOURCE_TYPE_IO:
794  case ACPI_RESOURCE_TYPE_FIXED_IO:
795  case ACPI_RESOURCE_TYPE_MEMORY24:
796  case ACPI_RESOURCE_TYPE_MEMORY32:
797  case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
798  case ACPI_RESOURCE_TYPE_ADDRESS16:
799  case ACPI_RESOURCE_TYPE_ADDRESS32:
800  case ACPI_RESOURCE_TYPE_ADDRESS64:
801  case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
802  case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
803  return 1;
804  }
805  return 0;
806 }
807 
808 /*
809  * Set resource
810  */
811 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
812  void *data)
813 {
814  int *res_cnt = data;
815 
816  if (pnpacpi_supported_resource(res))
817  (*res_cnt)++;
818  return AE_OK;
819 }
820 
821 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
822 {
823  struct acpi_resource **resource = data;
824 
825  if (pnpacpi_supported_resource(res)) {
826  (*resource)->type = res->type;
827  (*resource)->length = sizeof(struct acpi_resource);
828  if (res->type == ACPI_RESOURCE_TYPE_IRQ)
829  (*resource)->data.irq.descriptor_length =
830  res->data.irq.descriptor_length;
831  (*resource)++;
832  }
833 
834  return AE_OK;
835 }
836 
837 int pnpacpi_build_resource_template(struct pnp_dev *dev,
838  struct acpi_buffer *buffer)
839 {
840  struct acpi_device *acpi_dev = dev->data;
841  acpi_handle handle = acpi_dev->handle;
842  struct acpi_resource *resource;
843  int res_cnt = 0;
844  acpi_status status;
845 
846  status = acpi_walk_resources(handle, METHOD_NAME__CRS,
847  pnpacpi_count_resources, &res_cnt);
848  if (ACPI_FAILURE(status)) {
849  dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
850  return -EINVAL;
851  }
852  if (!res_cnt)
853  return -EINVAL;
854  buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
855  buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
856  if (!buffer->pointer)
857  return -ENOMEM;
858 
859  resource = (struct acpi_resource *)buffer->pointer;
860  status = acpi_walk_resources(handle, METHOD_NAME__CRS,
861  pnpacpi_type_resources, &resource);
862  if (ACPI_FAILURE(status)) {
863  kfree(buffer->pointer);
864  dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
865  return -EINVAL;
866  }
867  /* resource will pointer the end resource now */
868  resource->type = ACPI_RESOURCE_TYPE_END_TAG;
869 
870  return 0;
871 }
872 
873 static void pnpacpi_encode_irq(struct pnp_dev *dev,
874  struct acpi_resource *resource,
875  struct resource *p)
876 {
877  struct acpi_resource_irq *irq = &resource->data.irq;
878  int triggering, polarity, shareable;
879 
880  if (!pnp_resource_enabled(p)) {
881  irq->interrupt_count = 0;
882  pnp_dbg(&dev->dev, " encode irq (%s)\n",
883  p ? "disabled" : "missing");
884  return;
885  }
886 
887  decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
888  irq->triggering = triggering;
889  irq->polarity = polarity;
890  irq->sharable = shareable;
891  irq->interrupt_count = 1;
892  irq->interrupts[0] = p->start;
893 
894  pnp_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n",
895  (int) p->start,
896  triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
897  polarity == ACPI_ACTIVE_LOW ? "low" : "high",
898  irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
899  irq->descriptor_length);
900 }
901 
902 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
903  struct acpi_resource *resource,
904  struct resource *p)
905 {
906  struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
907  int triggering, polarity, shareable;
908 
909  if (!pnp_resource_enabled(p)) {
910  extended_irq->interrupt_count = 0;
911  pnp_dbg(&dev->dev, " encode extended irq (%s)\n",
912  p ? "disabled" : "missing");
913  return;
914  }
915 
916  decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
917  extended_irq->producer_consumer = ACPI_CONSUMER;
918  extended_irq->triggering = triggering;
919  extended_irq->polarity = polarity;
920  extended_irq->sharable = shareable;
921  extended_irq->interrupt_count = 1;
922  extended_irq->interrupts[0] = p->start;
923 
924  pnp_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start,
925  triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
926  polarity == ACPI_ACTIVE_LOW ? "low" : "high",
927  extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
928 }
929 
930 static void pnpacpi_encode_dma(struct pnp_dev *dev,
931  struct acpi_resource *resource,
932  struct resource *p)
933 {
934  struct acpi_resource_dma *dma = &resource->data.dma;
935 
936  if (!pnp_resource_enabled(p)) {
937  dma->channel_count = 0;
938  pnp_dbg(&dev->dev, " encode dma (%s)\n",
939  p ? "disabled" : "missing");
940  return;
941  }
942 
943  /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
944  switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
945  case IORESOURCE_DMA_TYPEA:
946  dma->type = ACPI_TYPE_A;
947  break;
948  case IORESOURCE_DMA_TYPEB:
949  dma->type = ACPI_TYPE_B;
950  break;
951  case IORESOURCE_DMA_TYPEF:
952  dma->type = ACPI_TYPE_F;
953  break;
954  default:
955  dma->type = ACPI_COMPATIBILITY;
956  }
957 
958  switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
959  case IORESOURCE_DMA_8BIT:
960  dma->transfer = ACPI_TRANSFER_8;
961  break;
962  case IORESOURCE_DMA_8AND16BIT:
963  dma->transfer = ACPI_TRANSFER_8_16;
964  break;
965  default:
966  dma->transfer = ACPI_TRANSFER_16;
967  }
968 
969  dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
970  dma->channel_count = 1;
971  dma->channels[0] = p->start;
972 
973  pnp_dbg(&dev->dev, " encode dma %d "
974  "type %#x transfer %#x master %d\n",
975  (int) p->start, dma->type, dma->transfer, dma->bus_master);
976 }
977 
978 static void pnpacpi_encode_io(struct pnp_dev *dev,
979  struct acpi_resource *resource,
980  struct resource *p)
981 {
982  struct acpi_resource_io *io = &resource->data.io;
983 
984  if (pnp_resource_enabled(p)) {
985  /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
986  io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
987  ACPI_DECODE_16 : ACPI_DECODE_10;
988  io->minimum = p->start;
989  io->maximum = p->end;
990  io->alignment = 0; /* Correct? */
991  io->address_length = resource_size(p);
992  } else {
993  io->minimum = 0;
994  io->address_length = 0;
995  }
996 
997  pnp_dbg(&dev->dev, " encode io %#x-%#x decode %#x\n", io->minimum,
998  io->minimum + io->address_length - 1, io->io_decode);
999 }
1000 
1001 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
1002  struct acpi_resource *resource,
1003  struct resource *p)
1004 {
1005  struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
1006 
1007  if (pnp_resource_enabled(p)) {
1008  fixed_io->address = p->start;
1009  fixed_io->address_length = resource_size(p);
1010  } else {
1011  fixed_io->address = 0;
1012  fixed_io->address_length = 0;
1013  }
1014 
1015  pnp_dbg(&dev->dev, " encode fixed_io %#x-%#x\n", fixed_io->address,
1016  fixed_io->address + fixed_io->address_length - 1);
1017 }
1018 
1019 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
1020  struct acpi_resource *resource,
1021  struct resource *p)
1022 {
1023  struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
1024 
1025  if (pnp_resource_enabled(p)) {
1026  /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
1027  memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1028  ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1029  memory24->minimum = p->start;
1030  memory24->maximum = p->end;
1031  memory24->alignment = 0;
1032  memory24->address_length = resource_size(p);
1033  } else {
1034  memory24->minimum = 0;
1035  memory24->address_length = 0;
1036  }
1037 
1038  pnp_dbg(&dev->dev, " encode mem24 %#x-%#x write_protect %#x\n",
1039  memory24->minimum,
1040  memory24->minimum + memory24->address_length - 1,
1041  memory24->write_protect);
1042 }
1043 
1044 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
1045  struct acpi_resource *resource,
1046  struct resource *p)
1047 {
1048  struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
1049 
1050  if (pnp_resource_enabled(p)) {
1051  memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1052  ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1053  memory32->minimum = p->start;
1054  memory32->maximum = p->end;
1055  memory32->alignment = 0;
1056  memory32->address_length = resource_size(p);
1057  } else {
1058  memory32->minimum = 0;
1059  memory32->alignment = 0;
1060  }
1061 
1062  pnp_dbg(&dev->dev, " encode mem32 %#x-%#x write_protect %#x\n",
1063  memory32->minimum,
1064  memory32->minimum + memory32->address_length - 1,
1065  memory32->write_protect);
1066 }
1067 
1068 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
1069  struct acpi_resource *resource,
1070  struct resource *p)
1071 {
1072  struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
1073 
1074  if (pnp_resource_enabled(p)) {
1075  fixed_memory32->write_protect =
1076  p->flags & IORESOURCE_MEM_WRITEABLE ?
1077  ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1078  fixed_memory32->address = p->start;
1079  fixed_memory32->address_length = resource_size(p);
1080  } else {
1081  fixed_memory32->address = 0;
1082  fixed_memory32->address_length = 0;
1083  }
1084 
1085  pnp_dbg(&dev->dev, " encode fixed_mem32 %#x-%#x write_protect %#x\n",
1086  fixed_memory32->address,
1087  fixed_memory32->address + fixed_memory32->address_length - 1,
1088  fixed_memory32->write_protect);
1089 }
1090 
1091 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
1092 {
1093  int i = 0;
1094  /* pnpacpi_build_resource_template allocates extra mem */
1095  int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
1096  struct acpi_resource *resource = buffer->pointer;
1097  int port = 0, irq = 0, dma = 0, mem = 0;
1098 
1099  pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
1100  while (i < res_cnt) {
1101  switch (resource->type) {
1102  case ACPI_RESOURCE_TYPE_IRQ:
1103  pnpacpi_encode_irq(dev, resource,
1104  pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1105  irq++;
1106  break;
1107 
1108  case ACPI_RESOURCE_TYPE_DMA:
1109  pnpacpi_encode_dma(dev, resource,
1110  pnp_get_resource(dev, IORESOURCE_DMA, dma));
1111  dma++;
1112  break;
1113  case ACPI_RESOURCE_TYPE_IO:
1114  pnpacpi_encode_io(dev, resource,
1115  pnp_get_resource(dev, IORESOURCE_IO, port));
1116  port++;
1117  break;
1118  case ACPI_RESOURCE_TYPE_FIXED_IO:
1119  pnpacpi_encode_fixed_io(dev, resource,
1120  pnp_get_resource(dev, IORESOURCE_IO, port));
1121  port++;
1122  break;
1123  case ACPI_RESOURCE_TYPE_MEMORY24:
1124  pnpacpi_encode_mem24(dev, resource,
1125  pnp_get_resource(dev, IORESOURCE_MEM, mem));
1126  mem++;
1127  break;
1128  case ACPI_RESOURCE_TYPE_MEMORY32:
1129  pnpacpi_encode_mem32(dev, resource,
1130  pnp_get_resource(dev, IORESOURCE_MEM, mem));
1131  mem++;
1132  break;
1133  case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1134  pnpacpi_encode_fixed_mem32(dev, resource,
1135  pnp_get_resource(dev, IORESOURCE_MEM, mem));
1136  mem++;
1137  break;
1138  case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1139  pnpacpi_encode_ext_irq(dev, resource,
1140  pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1141  irq++;
1142  break;
1143  case ACPI_RESOURCE_TYPE_START_DEPENDENT:
1144  case ACPI_RESOURCE_TYPE_END_DEPENDENT:
1145  case ACPI_RESOURCE_TYPE_VENDOR:
1146  case ACPI_RESOURCE_TYPE_END_TAG:
1147  case ACPI_RESOURCE_TYPE_ADDRESS16:
1148  case ACPI_RESOURCE_TYPE_ADDRESS32:
1149  case ACPI_RESOURCE_TYPE_ADDRESS64:
1150  case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1151  case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1152  default: /* other type */
1153  dev_warn(&dev->dev, "can't encode unknown resource "
1154  "type %d\n", resource->type);
1155  return -EINVAL;
1156  }
1157  resource++;
1158  i++;
1159  }
1160  return 0;
1161 }
Generated on Thu Jan 10 2013 14:15:51 for Linux Kernel by   doxygen 1.8.2