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Suspend broadcom cards in order to stop their DMA.

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* grub-core/Makefile.am (KERNEL_HEADER_FILES): Add pci.h on x86 EFI.
	* grub-core/Makefile.core.def (kernel): Add pci.c on x86 EFI.
	(pci): Don't build on x86 EFI.
	* grub-core/bus/pci.c (grub_pci_find_capability): New function.
	* grub-core/kern/efi/mm.c (stop_broadcom) [__i386__ || __x86_64__]:
	New function.
	(grub_efi_finish_boot_services) [__i386__ || __x86_64__]: Call
	stop_broadcom if running on EFI.
	* include/grub/pci.h (GRUB_PCI_CLASS_NETWORK): New enum value.
	(GRUB_PCI_CAP_POWER_MANAGEMENT): Likewise.
	(GRUB_PCI_VENDOR_BROADCOM): Likewise.
	(grub_pci_find_capability): New proto.

	Also-By: Vladimir Serbinenko <phcoder@gmail.com>
This commit is contained in:
Matthew Garrett 2012-05-03 17:26:55 +02:00 • committed by Vladimir 'phcoder' Serbinenko
parent 01aab9978f
commit 9d34bb85da
6 changed files with 122 additions and 2 deletions
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54
grub-core/kern/efi/mm.c
View file

@ -22,6 +22,10 @@
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#if defined (__i386__) || defined (__x86_64__)
#include <grub/pci.h>
#endif
#define NEXT_MEMORY_DESCRIPTOR(desc, size) \
((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size)))
@ -103,6 +107,43 @@ grub_efi_free_pages (grub_efi_physical_address_t address,
efi_call_2 (b->free_pages, address, pages);
}
#if defined (__i386__) || defined (__x86_64__)
static void
stop_broadcom (void)
{
auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev,
grub_pci_id_t pciid);
int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev,
grub_pci_id_t pciid)
{
grub_pci_address_t addr;
grub_uint8_t cap;
grub_uint16_t pm_state;
if ((pciid & 0xffff) != GRUB_PCI_VENDOR_BROADCOM)
return 0;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
if (grub_pci_read (addr) >> 24 != GRUB_PCI_CLASS_NETWORK)
return 0;
cap = grub_pci_find_capability (dev, GRUB_PCI_CAP_POWER_MANAGEMENT);
if (!cap)
return 0;
addr = grub_pci_make_address (dev, cap + 4);
pm_state = grub_pci_read_word (addr);
pm_state = pm_state | 0x03;
grub_pci_write_word (addr, pm_state);
grub_pci_read_word (addr);
return 0;
}
grub_pci_iterate (find_card);
}
#endif
grub_err_t
grub_efi_finish_boot_services (grub_efi_uintn_t *outbuf_size, void *outbuf,
grub_efi_uintn_t *map_key,
@ -112,6 +153,14 @@ grub_efi_finish_boot_services (grub_efi_uintn_t *outbuf_size, void *outbuf,
grub_efi_boot_services_t *b;
grub_efi_status_t status;
#if defined (__i386__) || defined (__x86_64__)
const grub_uint16_t apple[] = { 'A', 'p', 'p', 'l', 'e' };
int is_apple;
is_apple = (grub_memcmp (grub_efi_system_table->firmware_vendor,
apple, sizeof (apple)) == 0);
#endif
if (grub_efi_get_memory_map (&finish_mmap_size, finish_mmap_buf, &finish_key,
&finish_desc_size, &finish_desc_version) < 0)
return grub_error (GRUB_ERR_IO, "couldn't retrieve memory map");
@ -145,6 +194,11 @@ grub_efi_finish_boot_services (grub_efi_uintn_t *outbuf_size, void *outbuf,
if (efi_desc_version)
*efi_desc_version = finish_desc_version;
#if defined (__i386__) || defined (__x86_64__)
if (is_apple)
stop_broadcom ();
#endif
return GRUB_ERR_NONE;
}