efi/libstub: Drop protocol argument from efi_call_proto() macro

After refactoring the mixed mode support code, efi_call_proto()
no longer uses its protocol argument in any of its implementation,
so let's remove it altogether.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Borislav Petkov <bp@alien8.de>
Cc: James Morse <james.morse@arm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/20191224151025.32482-22-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/arm/include/asm/efi.h

@@ -57,8 +57,7 @@ void efi_virtmap_unload(void);
 #define efi_table_attr(table, attr, instance)				\
 	instance->attr
 
-#define efi_call_proto(protocol, f, instance, ...)			\
-	instance->f(instance, ##__VA_ARGS__)
+#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)
 
 struct screen_info *alloc_screen_info(void);
 void free_screen_info(struct screen_info *si);

arch/arm64/include/asm/efi.h

@@ -100,8 +100,7 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
 #define efi_table_attr(table, attr, instance)				\
 	instance->attr
 
-#define efi_call_proto(protocol, f, instance, ...)			\
-	instance->f(instance, ##__VA_ARGS__)
+#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)
 
 #define alloc_screen_info(x...)		&screen_info
 

arch/x86/boot/compressed/eboot.c

@@ -69,27 +69,24 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
 	rom->pcilen	= pci->romsize;
 	*__rom = rom;
 
-	status = efi_call_proto(efi_pci_io_protocol, pci.read, pci,
-				EfiPciIoWidthUint16, PCI_VENDOR_ID, 1,
-				&rom->vendor);
+	status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
+				PCI_VENDOR_ID, 1, &rom->vendor);
 
 	if (status != EFI_SUCCESS) {
 		efi_printk("Failed to read rom->vendor\n");
 		goto free_struct;
 	}
 
-	status = efi_call_proto(efi_pci_io_protocol, pci.read, pci,
-				EfiPciIoWidthUint16, PCI_DEVICE_ID, 1,
-				&rom->devid);
+	status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
+				PCI_DEVICE_ID, 1, &rom->devid);
 
 	if (status != EFI_SUCCESS) {
 		efi_printk("Failed to read rom->devid\n");
 		goto free_struct;
 	}
 
-	status = efi_call_proto(efi_pci_io_protocol, get_location, pci,
-				&rom->segment, &rom->bus, &rom->device,
-				&rom->function);
+	status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus,
+				&rom->device, &rom->function);
 
 	if (status != EFI_SUCCESS)
 		goto free_struct;
@@ -191,7 +188,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)
 		return;
 	}
 
-	efi_call_proto(apple_properties_protocol, get_all, p, NULL, &size);
+	efi_call_proto(p, get_all, NULL, &size);
 	if (!size)
 		return;
 
@@ -204,8 +201,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)
 			return;
 		}
 
-		status = efi_call_proto(apple_properties_protocol, get_all, p,
-					new->data, &size);
+		status = efi_call_proto(p, get_all, new->data, &size);
 
 		if (status == EFI_BUFFER_TOO_SMALL)
 			efi_call_early(free_pool, new);
@@ -280,8 +276,7 @@ setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size)
 		pciio = NULL;
 		efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
 
-		status = efi_call_proto(efi_uga_draw_protocol, get_mode, uga,
-					&w, &h, &depth, &refresh);
+		status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh);
 		if (status == EFI_SUCCESS && (!first_uga || pciio)) {
 			width = w;
 			height = h;

arch/x86/include/asm/efi.h

@@ -227,10 +227,10 @@ static inline bool efi_is_native(void)
 	__ret;								\
 })
 
-#define efi_call_proto(protocol, f, instance, ...)			\
+#define efi_call_proto(inst, func, ...)					\
 	(efi_is_native()						\
-		? instance->f(instance, ##__VA_ARGS__)			\
-		: efi64_thunk(instance->mixed_mode.f, instance,	##__VA_ARGS__))
+		? inst->func(inst, ##__VA_ARGS__)			\
+		: efi64_thunk(inst->mixed_mode.func, inst, ##__VA_ARGS__))
 
 #define efi_call_early(f, ...)						\
 	(efi_is_native()						\

drivers/firmware/efi/libstub/efi-stub-helper.c

@@ -953,9 +953,7 @@ void *get_efi_config_table(efi_guid_t guid)
 
 void efi_char16_printk(efi_char16_t *str)
 {
-	efi_call_proto(efi_simple_text_output_protocol,
-		       output_string,
-		       efi_table_attr(efi_system_table, con_out,
+	efi_call_proto(efi_table_attr(efi_system_table, con_out,
 				      efi_system_table()),
-		       str);
+		       output_string, str);
 }

drivers/firmware/efi/libstub/random.c

@@ -37,7 +37,7 @@ efi_status_t efi_get_random_bytes(unsigned long size, u8 *out)
 	if (status != EFI_SUCCESS)
 		return status;
 
-	return efi_call_proto(efi_rng_protocol, get_rng, rng, NULL, size, out);
+	return efi_call_proto(rng, get_rng, NULL, size, out);
 }
 
 /*
@@ -173,7 +173,7 @@ efi_status_t efi_random_get_seed(void)
 	if (status != EFI_SUCCESS)
 		return status;
 
-	status = efi_call_proto(efi_rng_protocol, get_rng, rng, &rng_algo_raw,
+	status = efi_call_proto(rng, get_rng, &rng_algo_raw,
 				 EFI_RANDOM_SEED_SIZE, seed->bits);
 
 	if (status == EFI_UNSUPPORTED)
@@ -181,8 +181,8 @@ efi_status_t efi_random_get_seed(void)
 		 * Use whatever algorithm we have available if the raw algorithm
 		 * is not implemented.
 		 */
-		status = efi_call_proto(efi_rng_protocol, get_rng, rng, NULL,
-					 EFI_RANDOM_SEED_SIZE, seed->bits);
+		status = efi_call_proto(rng, get_rng, NULL,
+					EFI_RANDOM_SEED_SIZE, seed->bits);
 
 	if (status != EFI_SUCCESS)
 		goto err_freepool;

drivers/firmware/efi/libstub/tpm.c

@@ -77,15 +77,14 @@ void efi_retrieve_tpm2_eventlog(void)
 	if (status != EFI_SUCCESS)
 		return;
 
-	status = efi_call_proto(efi_tcg2_protocol, get_event_log,
-				tcg2_protocol, version, &log_location,
-				&log_last_entry, &truncated);
+	status = efi_call_proto(tcg2_protocol, get_event_log, version,
+				&log_location, &log_last_entry, &truncated);
 
 	if (status != EFI_SUCCESS || !log_location) {
 		version = EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2;
-		status = efi_call_proto(efi_tcg2_protocol, get_event_log,
-					tcg2_protocol, version, &log_location,
-					&log_last_entry, &truncated);
+		status = efi_call_proto(tcg2_protocol, get_event_log, version,
+					&log_location, &log_last_entry,
+					&truncated);
 		if (status != EFI_SUCCESS || !log_location)
 			return;