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efi_loader: implement key notify functions

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Implement registering and unregistreing key notify functions in the
EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-09-11 22:38:12 +02:00 • committed by Alexander Graf
parent 4f17d8d391
commit 4fdcf06648
1 changed files with 98 additions and 3 deletions
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101
lib/efi_loader/efi_console.c
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@ -392,8 +392,23 @@ struct efi_simple_text_output_protocol efi_con_out = {
.mode = (void*)&efi_con_mode,
};
/**
* struct efi_cin_notify_function - registered console input notify function
*
* @link: link to list
* @data: key to notify
* @function: function to call
*/
struct efi_cin_notify_function {
struct list_head link;
struct efi_key_data key;
efi_status_t (EFIAPI *function)
(struct efi_key_data *key_data);
};
static bool key_available;
static struct efi_key_data next_key;
static LIST_HEAD(cin_notify_functions);
/**
* set_shift_mask() - set shift mask
@ -597,6 +612,34 @@ static efi_status_t efi_cin_read_key(struct efi_key_data *key)
return EFI_SUCCESS;
}
/**
* efi_cin_notify() - notify registered functions
*/
static void efi_cin_notify(void)
{
struct efi_cin_notify_function *item;
list_for_each_entry(item, &cin_notify_functions, link) {
bool match = true;
/* We do not support toggle states */
if (item->key.key.unicode_char || item->key.key.scan_code) {
if (item->key.key.unicode_char !=
next_key.key.unicode_char ||
item->key.key.scan_code != next_key.key.scan_code)
match = false;
}
if (item->key.key_state.key_shift_state &&
item->key.key_state.key_shift_state !=
next_key.key_state.key_shift_state)
match = false;
if (match)
/* We don't bother about the return code */
EFI_CALL(item->function(&next_key));
}
}
/**
* efi_cin_check() - check if keyboard input is available
*/
@ -614,8 +657,12 @@ static void efi_cin_check(void)
if (ret == EFI_SUCCESS) {
key_available = true;
/* Notify registered functions */
efi_cin_notify();
/* Queue the wait for key event */
efi_signal_event(efi_con_in.wait_for_key, true);
if (key_available)
efi_signal_event(efi_con_in.wait_for_key, true);
}
}
}
@ -757,9 +804,35 @@ static efi_status_t EFIAPI efi_cin_register_key_notify(
struct efi_key_data *key_data),
void **notify_handle)
{
efi_status_t ret = EFI_SUCCESS;
struct efi_cin_notify_function *notify_function;
EFI_ENTRY("%p, %p, %p, %p",
this, key_data, key_notify_function, notify_handle);
return EFI_EXIT(EFI_OUT_OF_RESOURCES);
/* Check parameters */
if (!this || !key_data || !key_notify_function || !notify_handle) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
EFI_PRINT("u+%04x, sc %04x, sh %08x, tg %02x\n",
key_data->key.unicode_char,
key_data->key.scan_code,
key_data->key_state.key_shift_state,
key_data->key_state.key_toggle_state);
notify_function = calloc(1, sizeof(struct efi_cin_notify_function));
if (!notify_function) {
ret = EFI_OUT_OF_RESOURCES;
goto out;
}
notify_function->key = *key_data;
notify_function->function = key_notify_function;
list_add_tail(&notify_function->link, &cin_notify_functions);
*notify_handle = notify_function;
out:
return EFI_EXIT(ret);
}
/**
@ -779,8 +852,30 @@ static efi_status_t EFIAPI efi_cin_unregister_key_notify(
struct efi_simple_text_input_ex_protocol *this,
void *notification_handle)
{
efi_status_t ret = EFI_INVALID_PARAMETER;
struct efi_cin_notify_function *item, *notify_function =
notification_handle;
EFI_ENTRY("%p, %p", this, notification_handle);
return EFI_EXIT(EFI_INVALID_PARAMETER);
/* Check parameters */
if (!this || !notification_handle)
goto out;
list_for_each_entry(item, &cin_notify_functions, link) {
if (item == notify_function) {
ret = EFI_SUCCESS;
break;
}
}
if (ret != EFI_SUCCESS)
goto out;
/* Remove the notify function */
list_del(&notify_function->link);
free(notify_function);
out:
return EFI_EXIT(ret);
}