grub for grub_efi_open_protocol to pcie for helping

ario Wed, 12 Mar 2025 06:07:51 -0700

hi~
&nbsp; when is use grub-2.06 for uefi.&nbsp;&nbsp;grub_efi_open_protocol to 
opening pci protocol, i can grub_efi_pci_io_t&nbsp;&nbsp;*pci, but when i 
use&nbsp; 'grub_efi_pci_io_t&nbsp;&nbsp;*pci' for pci config (like 
this.&nbsp;&nbsp;pci-&gt;pci.read(pci, GRUB_EFI_PCI_IO_WIDTH_UINT16, 0, 1, 
&amp;vid); codes&nbsp;) . i can't get each for pci configs. i print the return 
3. could you help me how to use this. thanks!
`
&nbsp;handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &amp;pci_io_guid,
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; 0, &amp;num_handles);



&nbsp; &nbsp; &nbsp; &nbsp; if (!handles) {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; grub_printf 
("1111111111111111111handles is failed!\n");
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return;
&nbsp; &nbsp; &nbsp; &nbsp; }


&nbsp; &nbsp; &nbsp; &nbsp; for (handle = handles; num_handles--; handle++) {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; grub_efi_pci_io_t *pci;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; grub_efi_device_path_t 
*dp, *ldp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; dp = 
grub_efi_get_device_path (*handle);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (!dp) {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; grub_printf ("222222222222222222222222dp is failed!\n");
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; continue;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }


&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ldp = 
grub_efi_find_last_device_path (dp);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (! ldp) {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; grub_printf ("33333333333333ldp is failed!\n");
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; continue;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }


&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pci = 
grub_efi_open_protocol (*handle, &amp;pci_io_guid, 
GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);


&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //pci = 
grub_efi_locate_protocol (&amp;pci_io_guid, NULL);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (!pci) {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; grub_printf ("4444444444444444444444444444pci is failed!\n");
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 
&nbsp; continue;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }


&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pci-&gt;pci.read(pci, 
GRUB_EFI_PCI_IO_WIDTH_UINT16, 0, 1, &amp;vid);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pci-&gt;pci.read(pci, 
GRUB_EFI_PCI_IO_WIDTH_UINT16, 2, 1, &amp;pid);

`

grub for grub_efi_open_protocol to pcie for helping

Reply via email to