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Subject[PATCH 04/25] efi/gop: Unify 32/64-bit functions
Date
From: Arvind Sankar <nivedita@alum.mit.edu>

Use efi_table_attr macro to deal with 32/64-bit firmware using the same
source code.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
drivers/firmware/efi/libstub/gop.c | 134 ++++-------------------------
1 file changed, 18 insertions(+), 116 deletions(-)

diff --git a/drivers/firmware/efi/libstub/gop.c b/drivers/firmware/efi/libstub/gop.c
index a0c1ef64d445..94045ab7dd3d 100644
--- a/drivers/firmware/efi/libstub/gop.c
+++ b/drivers/firmware/efi/libstub/gop.c
@@ -83,108 +83,14 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
}
}

-static efi_status_t
-setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
- efi_guid_t *proto, unsigned long size, void **gop_handle)
-{
- efi_graphics_output_protocol_32_t *gop32, *first_gop;
- unsigned long nr_gops;
- u16 width, height;
- u32 pixels_per_scan_line;
- u32 ext_lfb_base;
- efi_physical_addr_t fb_base;
- efi_pixel_bitmask_t pixel_info;
- int pixel_format;
- efi_status_t status;
- u32 *handles = (u32 *)(unsigned long)gop_handle;
- int i;
-
- first_gop = NULL;
- gop32 = NULL;
-
- nr_gops = size / sizeof(u32);
- for (i = 0; i < nr_gops; i++) {
- efi_graphics_output_protocol_mode_32_t *mode;
- efi_graphics_output_mode_info_t *info = NULL;
- efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
- bool conout_found = false;
- void *dummy = NULL;
- efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
- efi_physical_addr_t current_fb_base;
-
- status = efi_call_early(handle_protocol, h,
- proto, (void **)&gop32);
- if (status != EFI_SUCCESS)
- continue;
-
- status = efi_call_early(handle_protocol, h,
- &conout_proto, &dummy);
- if (status == EFI_SUCCESS)
- conout_found = true;
-
- mode = (void *)(unsigned long)gop32->mode;
- info = (void *)(unsigned long)mode->info;
- current_fb_base = mode->frame_buffer_base;
-
- if ((!first_gop || conout_found) &&
- info->pixel_format != PIXEL_BLT_ONLY) {
- /*
- * Systems that use the UEFI Console Splitter may
- * provide multiple GOP devices, not all of which are
- * backed by real hardware. The workaround is to search
- * for a GOP implementing the ConOut protocol, and if
- * one isn't found, to just fall back to the first GOP.
- */
- width = info->horizontal_resolution;
- height = info->vertical_resolution;
- pixel_format = info->pixel_format;
- pixel_info = info->pixel_information;
- pixels_per_scan_line = info->pixels_per_scan_line;
- fb_base = current_fb_base;
-
- /*
- * Once we've found a GOP supporting ConOut,
- * don't bother looking any further.
- */
- first_gop = gop32;
- if (conout_found)
- break;
- }
- }
-
- /* Did we find any GOPs? */
- if (!first_gop)
- return EFI_NOT_FOUND;
-
- /* EFI framebuffer */
- si->orig_video_isVGA = VIDEO_TYPE_EFI;
-
- si->lfb_width = width;
- si->lfb_height = height;
- si->lfb_base = fb_base;
-
- ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
- if (ext_lfb_base) {
- si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
- si->ext_lfb_base = ext_lfb_base;
- }
-
- si->pages = 1;
-
- setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
-
- si->lfb_size = si->lfb_linelength * si->lfb_height;
-
- si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
-
- return EFI_SUCCESS;
-}
+#define efi_gop_attr(table, attr, instance) \
+ (efi_table_attr(efi_graphics_output_protocol##table, attr, instance))

static efi_status_t
-setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
- efi_guid_t *proto, unsigned long size, void **gop_handle)
+setup_gop(efi_system_table_t *sys_table_arg, struct screen_info *si,
+ efi_guid_t *proto, unsigned long size, void **handles)
{
- efi_graphics_output_protocol_64_t *gop64, *first_gop;
+ efi_graphics_output_protocol_t *gop, *first_gop;
unsigned long nr_gops;
u16 width, height;
u32 pixels_per_scan_line;
@@ -193,24 +99,26 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
efi_pixel_bitmask_t pixel_info;
int pixel_format;
efi_status_t status;
- u64 *handles = (u64 *)(unsigned long)gop_handle;
int i;
+ bool is64 = efi_is_64bit();

first_gop = NULL;
- gop64 = NULL;
+ gop = NULL;

- nr_gops = size / sizeof(u64);
+ nr_gops = size / (is64 ? sizeof(u64) : sizeof(u32));
for (i = 0; i < nr_gops; i++) {
- efi_graphics_output_protocol_mode_64_t *mode;
+ efi_graphics_output_protocol_mode_t *mode;
efi_graphics_output_mode_info_t *info = NULL;
efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
bool conout_found = false;
void *dummy = NULL;
- efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
+ efi_handle_t h = (efi_handle_t)(unsigned long)
+ (is64 ? ((u64 *)handles)[i]
+ : ((u32 *)handles)[i]);
efi_physical_addr_t current_fb_base;

status = efi_call_early(handle_protocol, h,
- proto, (void **)&gop64);
+ proto, (void **)&gop);
if (status != EFI_SUCCESS)
continue;

@@ -219,9 +127,9 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
if (status == EFI_SUCCESS)
conout_found = true;

- mode = (void *)(unsigned long)gop64->mode;
- info = (void *)(unsigned long)mode->info;
- current_fb_base = mode->frame_buffer_base;
+ mode = (void *)(unsigned long)efi_gop_attr(, mode, gop);
+ info = (void *)(unsigned long)efi_gop_attr(_mode, info, mode);
+ current_fb_base = efi_gop_attr(_mode, frame_buffer_base, mode);

if ((!first_gop || conout_found) &&
info->pixel_format != PIXEL_BLT_ONLY) {
@@ -243,7 +151,7 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
* Once we've found a GOP supporting ConOut,
* don't bother looking any further.
*/
- first_gop = gop64;
+ first_gop = gop;
if (conout_found)
break;
}
@@ -298,13 +206,7 @@ efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
if (status != EFI_SUCCESS)
goto free_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);
- }
+ status = setup_gop(sys_table_arg, si, proto, size, gop_handle);

free_handle:
efi_call_early(free_pool, gop_handle);
--
2.20.1
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