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authorYu Zhao <yu.zhao@intel.com>2009-05-18 01:51:34 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-05-18 09:45:09 -0400
commitaa5d2b515b6fca5f8a56eac84f7fa0a68c1ce9b7 (patch)
treec98753254dfe2f3e54a4c38c9191ab5f4afb4c39
parente277d2fc79d6abb86fafadb58dca0b9c498a9aa7 (diff)
VT-d: parse ATSR in DMA Remapping Reporting Structure
Parse the Root Port ATS Capability Reporting Structure in the DMA Remapping Reporting Structure ACPI table. Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
-rw-r--r--drivers/pci/dmar.c112
-rw-r--r--include/linux/dmar.h9
-rw-r--r--include/linux/intel-iommu.h1
3 files changed, 116 insertions, 6 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index f23460a5d106..6d7f9619b8a9 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -267,6 +267,84 @@ rmrr_parse_dev(struct dmar_rmrr_unit *rmrru)
267 } 267 }
268 return ret; 268 return ret;
269} 269}
270
271static LIST_HEAD(dmar_atsr_units);
272
273static int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr)
274{
275 struct acpi_dmar_atsr *atsr;
276 struct dmar_atsr_unit *atsru;
277
278 atsr = container_of(hdr, struct acpi_dmar_atsr, header);
279 atsru = kzalloc(sizeof(*atsru), GFP_KERNEL);
280 if (!atsru)
281 return -ENOMEM;
282
283 atsru->hdr = hdr;
284 atsru->include_all = atsr->flags & 0x1;
285
286 list_add(&atsru->list, &dmar_atsr_units);
287
288 return 0;
289}
290
291static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru)
292{
293 int rc;
294 struct acpi_dmar_atsr *atsr;
295
296 if (atsru->include_all)
297 return 0;
298
299 atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header);
300 rc = dmar_parse_dev_scope((void *)(atsr + 1),
301 (void *)atsr + atsr->header.length,
302 &atsru->devices_cnt, &atsru->devices,
303 atsr->segment);
304 if (rc || !atsru->devices_cnt) {
305 list_del(&atsru->list);
306 kfree(atsru);
307 }
308
309 return rc;
310}
311
312int dmar_find_matched_atsr_unit(struct pci_dev *dev)
313{
314 int i;
315 struct pci_bus *bus;
316 struct acpi_dmar_atsr *atsr;
317 struct dmar_atsr_unit *atsru;
318
319 list_for_each_entry(atsru, &dmar_atsr_units, list) {
320 atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header);
321 if (atsr->segment == pci_domain_nr(dev->bus))
322 goto found;
323 }
324
325 return 0;
326
327found:
328 for (bus = dev->bus; bus; bus = bus->parent) {
329 struct pci_dev *bridge = bus->self;
330
331 if (!bridge || !bridge->is_pcie ||
332 bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
333 return 0;
334
335 if (bridge->pcie_type == PCI_EXP_TYPE_ROOT_PORT) {
336 for (i = 0; i < atsru->devices_cnt; i++)
337 if (atsru->devices[i] == bridge)
338 return 1;
339 break;
340 }
341 }
342
343 if (atsru->include_all)
344 return 1;
345
346 return 0;
347}
270#endif 348#endif
271 349
272static void __init 350static void __init
@@ -274,22 +352,28 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
274{ 352{
275 struct acpi_dmar_hardware_unit *drhd; 353 struct acpi_dmar_hardware_unit *drhd;
276 struct acpi_dmar_reserved_memory *rmrr; 354 struct acpi_dmar_reserved_memory *rmrr;
355 struct acpi_dmar_atsr *atsr;
277 356
278 switch (header->type) { 357 switch (header->type) {
279 case ACPI_DMAR_TYPE_HARDWARE_UNIT: 358 case ACPI_DMAR_TYPE_HARDWARE_UNIT:
280 drhd = (struct acpi_dmar_hardware_unit *)header; 359 drhd = container_of(header, struct acpi_dmar_hardware_unit,
360 header);
281 printk (KERN_INFO PREFIX 361 printk (KERN_INFO PREFIX
282 "DRHD (flags: 0x%08x)base: 0x%016Lx\n", 362 "DRHD base: %#016Lx flags: %#x\n",
283 drhd->flags, (unsigned long long)drhd->address); 363 (unsigned long long)drhd->address, drhd->flags);
284 break; 364 break;
285 case ACPI_DMAR_TYPE_RESERVED_MEMORY: 365 case ACPI_DMAR_TYPE_RESERVED_MEMORY:
286 rmrr = (struct acpi_dmar_reserved_memory *)header; 366 rmrr = container_of(header, struct acpi_dmar_reserved_memory,
287 367 header);
288 printk (KERN_INFO PREFIX 368 printk (KERN_INFO PREFIX
289 "RMRR base: 0x%016Lx end: 0x%016Lx\n", 369 "RMRR base: %#016Lx end: %#016Lx\n",
290 (unsigned long long)rmrr->base_address, 370 (unsigned long long)rmrr->base_address,
291 (unsigned long long)rmrr->end_address); 371 (unsigned long long)rmrr->end_address);
292 break; 372 break;
373 case ACPI_DMAR_TYPE_ATSR:
374 atsr = container_of(header, struct acpi_dmar_atsr, header);
375 printk(KERN_INFO PREFIX "ATSR flags: %#x\n", atsr->flags);
376 break;
293 } 377 }
294} 378}
295 379
@@ -363,6 +447,11 @@ parse_dmar_table(void)
363 ret = dmar_parse_one_rmrr(entry_header); 447 ret = dmar_parse_one_rmrr(entry_header);
364#endif 448#endif
365 break; 449 break;
450 case ACPI_DMAR_TYPE_ATSR:
451#ifdef CONFIG_DMAR
452 ret = dmar_parse_one_atsr(entry_header);
453#endif
454 break;
366 default: 455 default:
367 printk(KERN_WARNING PREFIX 456 printk(KERN_WARNING PREFIX
368 "Unknown DMAR structure type\n"); 457 "Unknown DMAR structure type\n");
@@ -431,11 +520,19 @@ int __init dmar_dev_scope_init(void)
431#ifdef CONFIG_DMAR 520#ifdef CONFIG_DMAR
432 { 521 {
433 struct dmar_rmrr_unit *rmrr, *rmrr_n; 522 struct dmar_rmrr_unit *rmrr, *rmrr_n;
523 struct dmar_atsr_unit *atsr, *atsr_n;
524
434 list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { 525 list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) {
435 ret = rmrr_parse_dev(rmrr); 526 ret = rmrr_parse_dev(rmrr);
436 if (ret) 527 if (ret)
437 return ret; 528 return ret;
438 } 529 }
530
531 list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) {
532 ret = atsr_parse_dev(atsr);
533 if (ret)
534 return ret;
535 }
439 } 536 }
440#endif 537#endif
441 538
@@ -468,6 +565,9 @@ int __init dmar_table_init(void)
468#ifdef CONFIG_DMAR 565#ifdef CONFIG_DMAR
469 if (list_empty(&dmar_rmrr_units)) 566 if (list_empty(&dmar_rmrr_units))
470 printk(KERN_INFO PREFIX "No RMRR found\n"); 567 printk(KERN_INFO PREFIX "No RMRR found\n");
568
569 if (list_empty(&dmar_atsr_units))
570 printk(KERN_INFO PREFIX "No ATSR found\n");
471#endif 571#endif
472 572
473#ifdef CONFIG_INTR_REMAP 573#ifdef CONFIG_INTR_REMAP
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index e397dc342cda..7c9a207e5da6 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -185,6 +185,15 @@ struct dmar_rmrr_unit {
185 185
186#define for_each_rmrr_units(rmrr) \ 186#define for_each_rmrr_units(rmrr) \
187 list_for_each_entry(rmrr, &dmar_rmrr_units, list) 187 list_for_each_entry(rmrr, &dmar_rmrr_units, list)
188
189struct dmar_atsr_unit {
190 struct list_head list; /* list of ATSR units */
191 struct acpi_dmar_header *hdr; /* ACPI header */
192 struct pci_dev **devices; /* target devices */
193 int devices_cnt; /* target device count */
194 u8 include_all:1; /* include all ports */
195};
196
188/* Intel DMAR initialization functions */ 197/* Intel DMAR initialization functions */
189extern int intel_iommu_init(void); 198extern int intel_iommu_init(void);
190#else 199#else
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 29e05a034c09..0a1939f200fc 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -331,6 +331,7 @@ static inline void __iommu_flush_cache(
331} 331}
332 332
333extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev); 333extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
334extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);
334 335
335extern int alloc_iommu(struct dmar_drhd_unit *drhd); 336extern int alloc_iommu(struct dmar_drhd_unit *drhd);
336extern void free_iommu(struct intel_iommu *iommu); 337extern void free_iommu(struct intel_iommu *iommu);