14febfb8dSArd Biesheuvel // SPDX-License-Identifier: GPL-2.0 2fc372064SArd Biesheuvel /* ----------------------------------------------------------------------- 3fc372064SArd Biesheuvel * 4fc372064SArd Biesheuvel * Copyright 2011 Intel Corporation; author Matt Fleming 5fc372064SArd Biesheuvel * 6fc372064SArd Biesheuvel * ----------------------------------------------------------------------- */ 7fc372064SArd Biesheuvel 89867fc9dSArvind Sankar #include <linux/bitops.h> 9fc372064SArd Biesheuvel #include <linux/efi.h> 10fc372064SArd Biesheuvel #include <linux/screen_info.h> 11fc372064SArd Biesheuvel #include <asm/efi.h> 12fc372064SArd Biesheuvel #include <asm/setup.h> 13fc372064SArd Biesheuvel 142fcdad2aSArd Biesheuvel #include "efistub.h" 152fcdad2aSArd Biesheuvel 169867fc9dSArvind Sankar static void find_bits(u32 mask, u8 *pos, u8 *size) 17fc372064SArd Biesheuvel { 189867fc9dSArvind Sankar if (!mask) { 199867fc9dSArvind Sankar *pos = *size = 0; 209867fc9dSArvind Sankar return; 21fc372064SArd Biesheuvel } 22fc372064SArd Biesheuvel 239867fc9dSArvind Sankar /* UEFI spec guarantees that the set bits are contiguous */ 249867fc9dSArvind Sankar *pos = __ffs(mask); 259867fc9dSArvind Sankar *size = __fls(mask) - *pos + 1; 26fc372064SArd Biesheuvel } 27fc372064SArd Biesheuvel 28fc372064SArd Biesheuvel static void 29fc372064SArd Biesheuvel setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line, 3044c84b4aSArvind Sankar efi_pixel_bitmask_t pixel_info, int pixel_format) 31fc372064SArd Biesheuvel { 32fc372064SArd Biesheuvel if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) { 33fc372064SArd Biesheuvel si->lfb_depth = 32; 34fc372064SArd Biesheuvel si->lfb_linelength = pixels_per_scan_line * 4; 35fc372064SArd Biesheuvel si->red_size = 8; 36fc372064SArd Biesheuvel si->red_pos = 0; 37fc372064SArd Biesheuvel si->green_size = 8; 38fc372064SArd Biesheuvel si->green_pos = 8; 39fc372064SArd Biesheuvel si->blue_size = 8; 40fc372064SArd Biesheuvel si->blue_pos = 16; 41fc372064SArd Biesheuvel si->rsvd_size = 8; 42fc372064SArd Biesheuvel si->rsvd_pos = 24; 43fc372064SArd Biesheuvel } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) { 44fc372064SArd Biesheuvel si->lfb_depth = 32; 45fc372064SArd Biesheuvel si->lfb_linelength = pixels_per_scan_line * 4; 46fc372064SArd Biesheuvel si->red_size = 8; 47fc372064SArd Biesheuvel si->red_pos = 16; 48fc372064SArd Biesheuvel si->green_size = 8; 49fc372064SArd Biesheuvel si->green_pos = 8; 50fc372064SArd Biesheuvel si->blue_size = 8; 51fc372064SArd Biesheuvel si->blue_pos = 0; 52fc372064SArd Biesheuvel si->rsvd_size = 8; 53fc372064SArd Biesheuvel si->rsvd_pos = 24; 54fc372064SArd Biesheuvel } else if (pixel_format == PIXEL_BIT_MASK) { 55fc372064SArd Biesheuvel find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size); 56fc372064SArd Biesheuvel find_bits(pixel_info.green_mask, &si->green_pos, 57fc372064SArd Biesheuvel &si->green_size); 58fc372064SArd Biesheuvel find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size); 59fc372064SArd Biesheuvel find_bits(pixel_info.reserved_mask, &si->rsvd_pos, 60fc372064SArd Biesheuvel &si->rsvd_size); 61fc372064SArd Biesheuvel si->lfb_depth = si->red_size + si->green_size + 62fc372064SArd Biesheuvel si->blue_size + si->rsvd_size; 63fc372064SArd Biesheuvel si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8; 64fc372064SArd Biesheuvel } else { 65fc372064SArd Biesheuvel si->lfb_depth = 4; 66fc372064SArd Biesheuvel si->lfb_linelength = si->lfb_width / 2; 67fc372064SArd Biesheuvel si->red_size = 0; 68fc372064SArd Biesheuvel si->red_pos = 0; 69fc372064SArd Biesheuvel si->green_size = 0; 70fc372064SArd Biesheuvel si->green_pos = 0; 71fc372064SArd Biesheuvel si->blue_size = 0; 72fc372064SArd Biesheuvel si->blue_pos = 0; 73fc372064SArd Biesheuvel si->rsvd_size = 0; 74fc372064SArd Biesheuvel si->rsvd_pos = 0; 75fc372064SArd Biesheuvel } 76fc372064SArd Biesheuvel } 77fc372064SArd Biesheuvel 78ecf53091SArvind Sankar static efi_graphics_output_protocol_t * 79ecf53091SArvind Sankar find_gop(efi_guid_t *proto, unsigned long size, void **handles) 80fc372064SArd Biesheuvel { 81e484c594SArvind Sankar efi_graphics_output_protocol_t *first_gop; 822732ea0dSArd Biesheuvel efi_handle_t h; 83fc372064SArd Biesheuvel int i; 84fc372064SArd Biesheuvel 85fc372064SArd Biesheuvel first_gop = NULL; 86fc372064SArd Biesheuvel 872732ea0dSArd Biesheuvel for_each_efi_handle(h, handles, size, i) { 88e484c594SArvind Sankar efi_status_t status; 89e484c594SArvind Sankar 90e484c594SArvind Sankar efi_graphics_output_protocol_t *gop; 91e484c594SArvind Sankar efi_graphics_output_protocol_mode_t *mode; 92e484c594SArvind Sankar efi_graphics_output_mode_info_t *info; 93e484c594SArvind Sankar 94fc372064SArd Biesheuvel efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; 95fc372064SArd Biesheuvel void *dummy = NULL; 96fc372064SArd Biesheuvel 97966291f6SArd Biesheuvel status = efi_bs_call(handle_protocol, h, proto, (void **)&gop); 98fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 99fc372064SArd Biesheuvel continue; 100fc372064SArd Biesheuvel 1018cd20797SArvind Sankar mode = efi_table_attr(gop, mode); 1028cd20797SArvind Sankar info = efi_table_attr(mode, info); 1038cd20797SArvind Sankar if (info->pixel_format == PIXEL_BLT_ONLY) 1048cd20797SArvind Sankar continue; 1058cd20797SArvind Sankar 106fc372064SArd Biesheuvel /* 107fc372064SArd Biesheuvel * Systems that use the UEFI Console Splitter may 108fc372064SArd Biesheuvel * provide multiple GOP devices, not all of which are 109fc372064SArd Biesheuvel * backed by real hardware. The workaround is to search 110fc372064SArd Biesheuvel * for a GOP implementing the ConOut protocol, and if 111fc372064SArd Biesheuvel * one isn't found, to just fall back to the first GOP. 1126327e6d0SArvind Sankar * 113fc372064SArd Biesheuvel * Once we've found a GOP supporting ConOut, 114fc372064SArd Biesheuvel * don't bother looking any further. 115fc372064SArd Biesheuvel */ 1168e0a22e2SArvind Sankar status = efi_bs_call(handle_protocol, h, &conout_proto, &dummy); 1178e0a22e2SArvind Sankar if (status == EFI_SUCCESS) 1188e0a22e2SArvind Sankar return gop; 1198e0a22e2SArvind Sankar 1208e0a22e2SArvind Sankar if (!first_gop) 1218de8788dSArvind Sankar first_gop = gop; 122fc372064SArd Biesheuvel } 123fc372064SArd Biesheuvel 124ecf53091SArvind Sankar return first_gop; 125ecf53091SArvind Sankar } 126ecf53091SArvind Sankar 127ecf53091SArvind Sankar static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, 128ecf53091SArvind Sankar unsigned long size, void **handles) 129ecf53091SArvind Sankar { 130ecf53091SArvind Sankar efi_graphics_output_protocol_t *gop; 131ecf53091SArvind Sankar efi_graphics_output_protocol_mode_t *mode; 132e484c594SArvind Sankar efi_graphics_output_mode_info_t *info; 133ecf53091SArvind Sankar efi_physical_addr_t fb_base; 134ecf53091SArvind Sankar 135ecf53091SArvind Sankar gop = find_gop(proto, size, handles); 136ecf53091SArvind Sankar 137fc372064SArd Biesheuvel /* Did we find any GOPs? */ 138ecf53091SArvind Sankar if (!gop) 1396fc3cec3SArvind Sankar return EFI_NOT_FOUND; 140fc372064SArd Biesheuvel 141fc372064SArd Biesheuvel /* EFI framebuffer */ 142ecf53091SArvind Sankar mode = efi_table_attr(gop, mode); 1436327e6d0SArvind Sankar info = efi_table_attr(mode, info); 1446327e6d0SArvind Sankar 145fc372064SArd Biesheuvel si->orig_video_isVGA = VIDEO_TYPE_EFI; 146fc372064SArd Biesheuvel 1476327e6d0SArvind Sankar si->lfb_width = info->horizontal_resolution; 1486327e6d0SArvind Sankar si->lfb_height = info->vertical_resolution; 149fc372064SArd Biesheuvel 1506327e6d0SArvind Sankar fb_base = efi_table_attr(mode, frame_buffer_base); 151f1d1853bSArvind Sankar si->lfb_base = lower_32_bits(fb_base); 152f1d1853bSArvind Sankar si->ext_lfb_base = upper_32_bits(fb_base); 1536327e6d0SArvind Sankar if (si->ext_lfb_base) 154fc372064SArd Biesheuvel si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE; 155fc372064SArd Biesheuvel 156fc372064SArd Biesheuvel si->pages = 1; 157fc372064SArd Biesheuvel 1586327e6d0SArvind Sankar setup_pixel_info(si, info->pixels_per_scan_line, 1596327e6d0SArvind Sankar info->pixel_information, info->pixel_format); 160fc372064SArd Biesheuvel 161fc372064SArd Biesheuvel si->lfb_size = si->lfb_linelength * si->lfb_height; 162fc372064SArd Biesheuvel 163fc372064SArd Biesheuvel si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; 1646fc3cec3SArvind Sankar 165dbd89c30SArvind Sankar return EFI_SUCCESS; 166fc372064SArd Biesheuvel } 167fc372064SArd Biesheuvel 168fc372064SArd Biesheuvel /* 169fc372064SArd Biesheuvel * See if we have Graphics Output Protocol 170fc372064SArd Biesheuvel */ 171cd33a5c1SArd Biesheuvel efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto, 172fc372064SArd Biesheuvel unsigned long size) 173fc372064SArd Biesheuvel { 174fc372064SArd Biesheuvel efi_status_t status; 175fc372064SArd Biesheuvel void **gop_handle = NULL; 176fc372064SArd Biesheuvel 177966291f6SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 178966291f6SArd Biesheuvel (void **)&gop_handle); 179fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 180fc372064SArd Biesheuvel return status; 181fc372064SArd Biesheuvel 182966291f6SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, proto, NULL, 183966291f6SArd Biesheuvel &size, gop_handle); 184fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 185fc372064SArd Biesheuvel goto free_handle; 186fc372064SArd Biesheuvel 187cd33a5c1SArd Biesheuvel status = setup_gop(si, proto, size, gop_handle); 188fc372064SArd Biesheuvel 189fc372064SArd Biesheuvel free_handle: 190966291f6SArd Biesheuvel efi_bs_call(free_pool, gop_handle); 191fc372064SArd Biesheuvel return status; 192fc372064SArd Biesheuvel } 193