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From: Matt Fleming <matt@codeblueprint.co.uk>
To: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H . Peter Anvin" <hpa@zytor.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
	Matt Fleming <matt@codeblueprint.co.uk>,
	David Herrmann <dh.herrmann@gmail.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Peter Jones <pjones@redhat.com>,
	Will Deacon <will.deacon@arm.com>
Subject: [PATCH 16/40] x86/efi: Prepare GOP handling code for reuse as generic code
Date: Mon, 25 Apr 2016 21:06:48 +0100	[thread overview]
Message-ID: <1461614832-17633-17-git-send-email-matt@codeblueprint.co.uk> (raw)
In-Reply-To: <1461614832-17633-1-git-send-email-matt@codeblueprint.co.uk>

From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

In preparation of moving this code to drivers/firmware/efi and reusing
it on ARM and arm64, apply any changes that will be required to make this
code build for other architectures. This should make it easier to track
down problems that this move may cause to its operation on x86.

Note that the generic version uses slightly different ways of casting the
protocol methods and some other variables to the correct types, since such
method calls are not loosely typed on ARM and arm64 as they are on x86.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: David Herrmann <dh.herrmann@gmail.com>
Cc: Peter Jones <pjones@redhat.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
---
 arch/x86/boot/compressed/eboot.c | 58 ++++++++++++++++++++++++----------------
 arch/x86/boot/compressed/eboot.h |  4 +++
 arch/x86/include/asm/efi.h       |  5 ++++
 include/linux/efi.h              |  5 ++++
 4 files changed, 49 insertions(+), 23 deletions(-)

diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 583d539a4197..10516e22fdcb 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -622,19 +622,22 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
 }
 
 static efi_status_t
-__gop_query32(struct efi_graphics_output_protocol_32 *gop32,
+__gop_query32(efi_system_table_t *sys_table_arg,
+	      struct efi_graphics_output_protocol_32 *gop32,
 	      struct efi_graphics_output_mode_info **info,
 	      unsigned long *size, u64 *fb_base)
 {
 	struct efi_graphics_output_protocol_mode_32 *mode;
+	efi_graphics_output_protocol_query_mode query_mode;
 	efi_status_t status;
 	unsigned long m;
 
 	m = gop32->mode;
 	mode = (struct efi_graphics_output_protocol_mode_32 *)m;
+	query_mode = (void *)(unsigned long)gop32->query_mode;
 
-	status = efi_early->call(gop32->query_mode, gop32,
-				 mode->mode, size, info);
+	status = __efi_call_early(query_mode, (void *)gop32, mode->mode, size,
+				  info);
 	if (status != EFI_SUCCESS)
 		return status;
 
@@ -643,8 +646,8 @@ __gop_query32(struct efi_graphics_output_protocol_32 *gop32,
 }
 
 static efi_status_t
-setup_gop32(struct screen_info *si, efi_guid_t *proto,
-	    unsigned long size, void **gop_handle)
+setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
+            efi_guid_t *proto, unsigned long size, void **gop_handle)
 {
 	struct efi_graphics_output_protocol_32 *gop32, *first_gop;
 	unsigned long nr_gops;
@@ -654,7 +657,7 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 	u64 fb_base;
 	struct efi_pixel_bitmask pixel_info;
 	int pixel_format;
-	efi_status_t status;
+	efi_status_t status = EFI_NOT_FOUND;
 	u32 *handles = (u32 *)(unsigned long)gop_handle;
 	int i;
 
@@ -667,7 +670,7 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 		efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
 		bool conout_found = false;
 		void *dummy = NULL;
-		u32 h = handles[i];
+		efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
 		u64 current_fb_base;
 
 		status = efi_call_early(handle_protocol, h,
@@ -680,7 +683,8 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 		if (status == EFI_SUCCESS)
 			conout_found = true;
 
-		status = __gop_query32(gop32, &info, &size, &current_fb_base);
+		status = __gop_query32(sys_table_arg, gop32, &info, &size,
+				       &current_fb_base);
 		if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
 			/*
 			 * Systems that use the UEFI Console Splitter may
@@ -735,19 +739,22 @@ out:
 }
 
 static efi_status_t
-__gop_query64(struct efi_graphics_output_protocol_64 *gop64,
+__gop_query64(efi_system_table_t *sys_table_arg,
+	      struct efi_graphics_output_protocol_64 *gop64,
 	      struct efi_graphics_output_mode_info **info,
 	      unsigned long *size, u64 *fb_base)
 {
 	struct efi_graphics_output_protocol_mode_64 *mode;
+	efi_graphics_output_protocol_query_mode query_mode;
 	efi_status_t status;
 	unsigned long m;
 
 	m = gop64->mode;
 	mode = (struct efi_graphics_output_protocol_mode_64 *)m;
+	query_mode = (void *)(unsigned long)gop64->query_mode;
 
-	status = efi_early->call(gop64->query_mode, gop64,
-				 mode->mode, size, info);
+	status = __efi_call_early(query_mode, (void *)gop64, mode->mode, size,
+				  info);
 	if (status != EFI_SUCCESS)
 		return status;
 
@@ -756,8 +763,8 @@ __gop_query64(struct efi_graphics_output_protocol_64 *gop64,
 }
 
 static efi_status_t
-setup_gop64(struct screen_info *si, efi_guid_t *proto,
-	    unsigned long size, void **gop_handle)
+setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
+	    efi_guid_t *proto, unsigned long size, void **gop_handle)
 {
 	struct efi_graphics_output_protocol_64 *gop64, *first_gop;
 	unsigned long nr_gops;
@@ -767,7 +774,7 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 	u64 fb_base;
 	struct efi_pixel_bitmask pixel_info;
 	int pixel_format;
-	efi_status_t status;
+	efi_status_t status = EFI_NOT_FOUND;
 	u64 *handles = (u64 *)(unsigned long)gop_handle;
 	int i;
 
@@ -780,7 +787,7 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 		efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
 		bool conout_found = false;
 		void *dummy = NULL;
-		u64 h = handles[i];
+		efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
 		u64 current_fb_base;
 
 		status = efi_call_early(handle_protocol, h,
@@ -793,7 +800,8 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 		if (status == EFI_SUCCESS)
 			conout_found = true;
 
-		status = __gop_query64(gop64, &info, &size, &current_fb_base);
+		status = __gop_query64(sys_table_arg, gop64, &info, &size,
+				       &current_fb_base);
 		if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
 			/*
 			 * Systems that use the UEFI Console Splitter may
@@ -850,8 +858,9 @@ out:
 /*
  * See if we have Graphics Output Protocol
  */
-static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
-			      unsigned long size)
+efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
+			   struct screen_info *si, efi_guid_t *proto,
+			   unsigned long size)
 {
 	efi_status_t status;
 	void **gop_handle = NULL;
@@ -867,10 +876,13 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
 	if (status != EFI_SUCCESS)
 		goto free_handle;
 
-	if (efi_early->is64)
-		status = setup_gop64(si, proto, size, gop_handle);
-	else
-		status = setup_gop32(si, proto, size, gop_handle);
+	if (efi_is_64bit()) {
+		status = setup_gop64(sys_table_arg, si, proto, size,
+				     gop_handle);
+	} else {
+		status = setup_gop32(sys_table_arg, si, proto, size,
+				     gop_handle);
+	}
 
 free_handle:
 	efi_call_early(free_pool, gop_handle);
@@ -1038,7 +1050,7 @@ void setup_graphics(struct boot_params *boot_params)
 				EFI_LOCATE_BY_PROTOCOL,
 				&graphics_proto, NULL, &size, gop_handle);
 	if (status == EFI_BUFFER_TOO_SMALL)
-		status = setup_gop(si, &graphics_proto, size);
+		status = efi_setup_gop(NULL, si, &graphics_proto, size);
 
 	if (status != EFI_SUCCESS) {
 		size = 0;
diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h
index d487e727f1ec..4ee5318d7f28 100644
--- a/arch/x86/boot/compressed/eboot.h
+++ b/arch/x86/boot/compressed/eboot.h
@@ -85,6 +85,10 @@ struct efi_graphics_output_protocol {
 	struct efi_graphics_output_protocol_mode *mode;
 };
 
+typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
+	struct efi_graphics_output_protocol *, u32, unsigned long *,
+	struct efi_graphics_output_mode_info **);
+
 struct efi_uga_draw_protocol_32 {
 	u32 get_mode;
 	u32 set_mode;
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 53748c45e488..10e440770371 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -225,6 +225,11 @@ __pure const struct efi_config *__efi_early(void);
 #define efi_call_early(f, ...)						\
 	__efi_early()->call(__efi_early()->f, __VA_ARGS__);
 
+#define __efi_call_early(f, ...)					\
+	__efi_early()->call((unsigned long)f, __VA_ARGS__);
+
+#define efi_is_64bit()		__efi_early()->is64
+
 extern bool efi_reboot_required(void);
 
 #else
diff --git a/include/linux/efi.h b/include/linux/efi.h
index e29a31d0fc35..c2949909339b 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -21,6 +21,7 @@
 #include <linux/pfn.h>
 #include <linux/pstore.h>
 #include <linux/reboot.h>
+#include <linux/screen_info.h>
 
 #include <asm/page.h>
 
@@ -1352,5 +1353,9 @@ efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
 
 efi_status_t efi_parse_options(char *cmdline);
 
+efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
+			   struct screen_info *si, efi_guid_t *proto,
+			   unsigned long size);
+
 bool efi_runtime_disabled(void);
 #endif /* _LINUX_EFI_H */
-- 
2.7.3

  parent reply	other threads:[~2016-04-25 20:06 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-25 20:06 [GIT PULL 00/40] EFI changes for v4.7 Matt Fleming
2016-04-25 20:06 ` [PATCH 03/40] x86/mm/pat: Document the (currently) EFI-only code path Matt Fleming
2016-04-25 20:06 ` [PATCH 04/40] efi/arm64: Report unexpected errors when determining Secure Boot status Matt Fleming
2016-04-25 20:06 ` [PATCH 05/40] efi/arm64: Check SetupMode " Matt Fleming
2016-04-25 20:06 ` [PATCH 06/40] efi: Iterate over efi.memmap in for_each_efi_memory_desc Matt Fleming
2016-04-25 20:06 ` [PATCH 07/40] efi: Remove global 'memmap' Matt Fleming
2016-04-25 20:06 ` [PATCH 08/40] efi: Check EFI_MEMORY_DESCRIPTOR version explicitly Matt Fleming
2016-04-25 20:06 ` [PATCH 11/40] arm64: efi: Apply strict permissons for UEFI Runtime Services regions Matt Fleming
2016-04-25 20:06 ` [PATCH 12/40] efi: Add support for the EFI_MEMORY_ATTRIBUTES_TABLE config table Matt Fleming
2016-04-25 20:06 ` [PATCH 13/40] efi: Implement generic support for the Memory Attributes table Matt Fleming
2016-04-25 20:06 ` Matt Fleming [this message]
2016-04-25 20:06 ` [PATCH 17/40] efi/libstub: Move Graphics Output Protocol handling to generic code Matt Fleming
2016-04-25 20:06 ` [PATCH 18/40] x86/efi: efifb: Move DMI based quirks handling out of " Matt Fleming
2016-04-25 20:06 ` [PATCH 19/40] efifb: Use builtin_platform_driver and drop unused includes Matt Fleming
2016-04-25 20:06 ` [PATCH 20/40] arm64/efi: libstub: Make screen_info accessible to the UEFI stub Matt Fleming
2016-04-25 20:06 ` [PATCH 22/40] efi/arm*: libstub: Wire up GOP protocol to struct screen_info Matt Fleming
2016-04-25 20:06 ` [PATCH 23/40] efi/arm*: Wire up struct screen_info to efi-framebuffer platform device Matt Fleming
2016-04-25 20:06 ` [PATCH 24/40] efifb: Enable the efi-framebuffer platform driver for ARM and arm64 Matt Fleming
     [not found] ` <1461614832-17633-1-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-04-25 20:06   ` [PATCH 01/40] efi: Get rid of EFI_SYSTEM_TABLES status bit Matt Fleming
2016-04-25 20:06   ` [PATCH 02/40] efi/arm*: Drop writable mapping of the UEFI System table Matt Fleming
2016-04-25 20:06   ` [PATCH 09/40] efi/arm*: Use memremap() to create the persistent memmap mapping Matt Fleming
2016-04-25 20:06   ` [PATCH 10/40] ARM: efi: Apply strict permissons for UEFI Runtime Services regions Matt Fleming
2016-04-25 20:06   ` [PATCH 14/40] efi/arm*: Take the Memory Attributes table into account Matt Fleming
2016-04-25 20:06   ` [PATCH 15/40] x86/efi: Remove the always true EFI_DEBUG symbol Matt Fleming
2016-04-25 20:06   ` [PATCH 21/40] efi/arm: libstub: Make screen_info accessible to the UEFI stub Matt Fleming
2016-04-25 20:06   ` [PATCH 25/40] efibc: EFI Bootloader Control Matt Fleming
2016-04-25 20:07   ` [PATCH 31/40] efi/runtime-wrappers: Add {__,}efi_call_virt templates Matt Fleming
2016-04-25 20:07   ` [PATCH 32/40] arm64/efi: Move to generic {__,}efi_call_virt Matt Fleming
2016-04-25 20:07   ` [PATCH 34/40] x86/efi: " Matt Fleming
2016-04-25 20:07   ` [PATCH 35/40] efi/runtime-wrappers: Remove redundant ifdefs Matt Fleming
2016-04-25 20:06 ` [PATCH 26/40] efi: Move efi_status_to_err() to drivers/firmware/efi/ Matt Fleming
2016-04-25 20:06 ` [PATCH 27/40] efi: Capsule update support Matt Fleming
2016-04-25 20:07 ` [PATCH 28/40] x86/efi: Force EFI reboot to process pending capsules Matt Fleming
2016-04-25 20:07 ` [PATCH 29/40] efi: A misc char interface to update EFI firmware Matt Fleming
2016-04-25 20:07 ` [PATCH 30/40] efi/arm-init: Reserve rather than unmap the memory map for ARM as well Matt Fleming
2016-04-25 20:07 ` [PATCH 33/40] arm/efi: Move to generic {__,}efi_call_virt Matt Fleming
2016-04-25 20:07 ` [PATCH 36/40] efi/runtime-wrappers: Detect firmware irq flag corruption Matt Fleming
2016-04-25 20:07 ` [PATCH 37/40] arm64/efi: Enable runtime call flag checking Matt Fleming
2016-04-25 20:07 ` [PATCH 38/40] arm/efi: " Matt Fleming
2016-04-25 20:07 ` [PATCH 39/40] x86/efi: " Matt Fleming
2016-04-25 20:07 ` [PATCH 40/40] efi/runtime-wrappers: Remove ARCH_EFI_IRQ_FLAGS_MASK ifdef Matt Fleming

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