[U-Boot] [PATCH v2 3/3] efi_loader: implement OpenProtocolInformation
Rob Clark
robdclark at gmail.com
Sat Aug 5 17:49:53 UTC 2017
On Sat, Aug 5, 2017 at 12:58 PM, Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
> efi_open_protocol_information provides the agent and controller
> handles as well as the attributes and open count of an protocol
> on a handle.
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> ---
> v2:
> new patch
> ---
> lib/efi_loader/efi_boottime.c | 77 ++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 76 insertions(+), 1 deletion(-)
>
> diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> index 65a7a79dc1..941d07192d 100644
> --- a/lib/efi_loader/efi_boottime.c
> +++ b/lib/efi_loader/efi_boottime.c
> @@ -984,14 +984,89 @@ out:
> return EFI_EXIT(r);
> }
>
> +static efi_status_t efi_copy_open_protocol_information(
> + struct efi_handler *protocol,
> + struct efi_open_protocol_info_entry **entry_buffer,
> + unsigned long *entry_count)
> +{
> + unsigned long buffer_size;
> + unsigned long count = 0;
> + size_t i;
> + efi_status_t r;
> +
> + *entry_buffer = NULL;
> +
> + /* Count entries */
> + for (i = 0; i < ARRAY_SIZE(protocol->open_info); ++i) {
> + struct efi_open_protocol_info_entry *open_info =
> + &protocol->open_info[i];
> +
> + if (open_info->open_count)
> + ++count;
> + }
> + *entry_count = count;
> + if (!count)
> + return EFI_SUCCESS;
> +
> + /* Copy entries */
> + buffer_size = count * sizeof(struct efi_open_protocol_info_entry);
> + r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
> + (void **)entry_buffer);
> + if (r != EFI_SUCCESS)
> + return r;
looks like something went awry with the indentation here?
(btw, one could wish UEFI was more consistent with caller vs callee
allocations... sigh..)
> + count = 0;
> + for (i = 0; i < ARRAY_SIZE(protocol->open_info); ++i) {
> + struct efi_open_protocol_info_entry *open_info =
> + &protocol->open_info[i];
> +
> + if (!open_info->open_count)
> + continue;
> + (*entry_buffer)[count] = *open_info;
> + ++count;
> + }
> +
> + return EFI_SUCCESS;
> +}
> +
> static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
> efi_guid_t *protocol,
> struct efi_open_protocol_info_entry **entry_buffer,
> unsigned long *entry_count)
> {
> + struct efi_object *efiobj;
> + size_t i;
> + struct list_head *lhandle;
> + efi_status_t r = EFI_NOT_FOUND;
> +
> EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
> entry_count);
> - return EFI_EXIT(EFI_NOT_FOUND);
> +
> + if (!handle || !protocol || !entry_buffer)
> + EFI_EXIT(EFI_INVALID_PARAMETER);
> +
> + EFI_PRINT_GUID("protocol:", protocol);
> +
> + list_for_each(lhandle, &efi_obj_list) {
> + efiobj = list_entry(lhandle, struct efi_object, link);
list_for_each_entry()?
with those minor nits addressed, you can add my r-b
BR,
-R
> +
> + if (efiobj->handle != handle)
> + continue;
> +
> + for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
> + struct efi_handler *handler = &efiobj->protocols[i];
> + const efi_guid_t *hprotocol = handler->guid;
> + if (!hprotocol)
> + continue;
> + if (!guidcmp(hprotocol, protocol)) {
> + r = efi_copy_open_protocol_information(
> + handler, entry_buffer, entry_count);
> + goto out;
> + }
> + }
> + goto out;
> + }
> +out:
> + return EFI_EXIT(r);
> }
>
> static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
> --
> 2.11.0
>
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