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 8fc372064SArd Biesheuvel #include <linux/efi.h> 9fc372064SArd Biesheuvel #include <linux/screen_info.h> 10fc372064SArd Biesheuvel #include <asm/efi.h> 11fc372064SArd Biesheuvel #include <asm/setup.h> 12fc372064SArd Biesheuvel 132fcdad2aSArd Biesheuvel #include "efistub.h" 142fcdad2aSArd Biesheuvel 15fc372064SArd Biesheuvel static void find_bits(unsigned long mask, u8 *pos, u8 *size) 16fc372064SArd Biesheuvel { 17fc372064SArd Biesheuvel u8 first, len; 18fc372064SArd Biesheuvel 19fc372064SArd Biesheuvel first = 0; 20fc372064SArd Biesheuvel len = 0; 21fc372064SArd Biesheuvel 22fc372064SArd Biesheuvel if (mask) { 23fc372064SArd Biesheuvel while (!(mask & 0x1)) { 24fc372064SArd Biesheuvel mask = mask >> 1; 25fc372064SArd Biesheuvel first++; 26fc372064SArd Biesheuvel } 27fc372064SArd Biesheuvel 28fc372064SArd Biesheuvel while (mask & 0x1) { 29fc372064SArd Biesheuvel mask = mask >> 1; 30fc372064SArd Biesheuvel len++; 31fc372064SArd Biesheuvel } 32fc372064SArd Biesheuvel } 33fc372064SArd Biesheuvel 34fc372064SArd Biesheuvel *pos = first; 35fc372064SArd Biesheuvel *size = len; 36fc372064SArd Biesheuvel } 37fc372064SArd Biesheuvel 38fc372064SArd Biesheuvel static void 39fc372064SArd Biesheuvel setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line, 4044c84b4aSArvind Sankar efi_pixel_bitmask_t pixel_info, int pixel_format) 41fc372064SArd Biesheuvel { 42fc372064SArd Biesheuvel if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) { 43fc372064SArd Biesheuvel si->lfb_depth = 32; 44fc372064SArd Biesheuvel si->lfb_linelength = pixels_per_scan_line * 4; 45fc372064SArd Biesheuvel si->red_size = 8; 46fc372064SArd Biesheuvel si->red_pos = 0; 47fc372064SArd Biesheuvel si->green_size = 8; 48fc372064SArd Biesheuvel si->green_pos = 8; 49fc372064SArd Biesheuvel si->blue_size = 8; 50fc372064SArd Biesheuvel si->blue_pos = 16; 51fc372064SArd Biesheuvel si->rsvd_size = 8; 52fc372064SArd Biesheuvel si->rsvd_pos = 24; 53fc372064SArd Biesheuvel } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) { 54fc372064SArd Biesheuvel si->lfb_depth = 32; 55fc372064SArd Biesheuvel si->lfb_linelength = pixels_per_scan_line * 4; 56fc372064SArd Biesheuvel si->red_size = 8; 57fc372064SArd Biesheuvel si->red_pos = 16; 58fc372064SArd Biesheuvel si->green_size = 8; 59fc372064SArd Biesheuvel si->green_pos = 8; 60fc372064SArd Biesheuvel si->blue_size = 8; 61fc372064SArd Biesheuvel si->blue_pos = 0; 62fc372064SArd Biesheuvel si->rsvd_size = 8; 63fc372064SArd Biesheuvel si->rsvd_pos = 24; 64fc372064SArd Biesheuvel } else if (pixel_format == PIXEL_BIT_MASK) { 65fc372064SArd Biesheuvel find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size); 66fc372064SArd Biesheuvel find_bits(pixel_info.green_mask, &si->green_pos, 67fc372064SArd Biesheuvel &si->green_size); 68fc372064SArd Biesheuvel find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size); 69fc372064SArd Biesheuvel find_bits(pixel_info.reserved_mask, &si->rsvd_pos, 70fc372064SArd Biesheuvel &si->rsvd_size); 71fc372064SArd Biesheuvel si->lfb_depth = si->red_size + si->green_size + 72fc372064SArd Biesheuvel si->blue_size + si->rsvd_size; 73fc372064SArd Biesheuvel si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8; 74fc372064SArd Biesheuvel } else { 75fc372064SArd Biesheuvel si->lfb_depth = 4; 76fc372064SArd Biesheuvel si->lfb_linelength = si->lfb_width / 2; 77fc372064SArd Biesheuvel si->red_size = 0; 78fc372064SArd Biesheuvel si->red_pos = 0; 79fc372064SArd Biesheuvel si->green_size = 0; 80fc372064SArd Biesheuvel si->green_pos = 0; 81fc372064SArd Biesheuvel si->blue_size = 0; 82fc372064SArd Biesheuvel si->blue_pos = 0; 83fc372064SArd Biesheuvel si->rsvd_size = 0; 84fc372064SArd Biesheuvel si->rsvd_pos = 0; 85fc372064SArd Biesheuvel } 86fc372064SArd Biesheuvel } 87fc372064SArd Biesheuvel 88ecf53091SArvind Sankar static efi_graphics_output_protocol_t * 89ecf53091SArvind Sankar find_gop(efi_guid_t *proto, unsigned long size, void **handles) 90fc372064SArd Biesheuvel { 91e484c594SArvind Sankar efi_graphics_output_protocol_t *first_gop; 922732ea0dSArd Biesheuvel efi_handle_t h; 93fc372064SArd Biesheuvel int i; 94fc372064SArd Biesheuvel 95fc372064SArd Biesheuvel first_gop = NULL; 96fc372064SArd Biesheuvel 972732ea0dSArd Biesheuvel for_each_efi_handle(h, handles, size, i) { 98e484c594SArvind Sankar efi_status_t status; 99e484c594SArvind Sankar 100e484c594SArvind Sankar efi_graphics_output_protocol_t *gop; 101e484c594SArvind Sankar efi_graphics_output_protocol_mode_t *mode; 102e484c594SArvind Sankar efi_graphics_output_mode_info_t *info; 103e484c594SArvind Sankar 104fc372064SArd Biesheuvel efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; 105fc372064SArd Biesheuvel void *dummy = NULL; 106fc372064SArd Biesheuvel 107966291f6SArd Biesheuvel status = efi_bs_call(handle_protocol, h, proto, (void **)&gop); 108fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 109fc372064SArd Biesheuvel continue; 110fc372064SArd Biesheuvel 1118cd20797SArvind Sankar mode = efi_table_attr(gop, mode); 1128cd20797SArvind Sankar info = efi_table_attr(mode, info); 1138cd20797SArvind Sankar if (info->pixel_format == PIXEL_BLT_ONLY) 1148cd20797SArvind Sankar continue; 1158cd20797SArvind Sankar 116fc372064SArd Biesheuvel /* 117fc372064SArd Biesheuvel * Systems that use the UEFI Console Splitter may 118fc372064SArd Biesheuvel * provide multiple GOP devices, not all of which are 119fc372064SArd Biesheuvel * backed by real hardware. The workaround is to search 120fc372064SArd Biesheuvel * for a GOP implementing the ConOut protocol, and if 121fc372064SArd Biesheuvel * one isn't found, to just fall back to the first GOP. 1226327e6d0SArvind Sankar * 123fc372064SArd Biesheuvel * Once we've found a GOP supporting ConOut, 124fc372064SArd Biesheuvel * don't bother looking any further. 125fc372064SArd Biesheuvel */ 1268e0a22e2SArvind Sankar status = efi_bs_call(handle_protocol, h, &conout_proto, &dummy); 1278e0a22e2SArvind Sankar if (status == EFI_SUCCESS) 1288e0a22e2SArvind Sankar return gop; 1298e0a22e2SArvind Sankar 1308e0a22e2SArvind Sankar if (!first_gop) 1318de8788dSArvind Sankar first_gop = gop; 132fc372064SArd Biesheuvel } 133fc372064SArd Biesheuvel 134ecf53091SArvind Sankar return first_gop; 135ecf53091SArvind Sankar } 136ecf53091SArvind Sankar 137ecf53091SArvind Sankar static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, 138ecf53091SArvind Sankar unsigned long size, void **handles) 139ecf53091SArvind Sankar { 140ecf53091SArvind Sankar efi_graphics_output_protocol_t *gop; 141ecf53091SArvind Sankar efi_graphics_output_protocol_mode_t *mode; 142e484c594SArvind Sankar efi_graphics_output_mode_info_t *info; 143ecf53091SArvind Sankar efi_physical_addr_t fb_base; 144ecf53091SArvind Sankar 145ecf53091SArvind Sankar gop = find_gop(proto, size, handles); 146ecf53091SArvind Sankar 147fc372064SArd Biesheuvel /* Did we find any GOPs? */ 148ecf53091SArvind Sankar if (!gop) 1496fc3cec3SArvind Sankar return EFI_NOT_FOUND; 150fc372064SArd Biesheuvel 151fc372064SArd Biesheuvel /* EFI framebuffer */ 152ecf53091SArvind Sankar mode = efi_table_attr(gop, mode); 1536327e6d0SArvind Sankar info = efi_table_attr(mode, info); 1546327e6d0SArvind Sankar 155fc372064SArd Biesheuvel si->orig_video_isVGA = VIDEO_TYPE_EFI; 156fc372064SArd Biesheuvel 1576327e6d0SArvind Sankar si->lfb_width = info->horizontal_resolution; 1586327e6d0SArvind Sankar si->lfb_height = info->vertical_resolution; 159fc372064SArd Biesheuvel 1606327e6d0SArvind Sankar fb_base = efi_table_attr(mode, frame_buffer_base); 1616327e6d0SArvind Sankar si->lfb_base = fb_base; 1626327e6d0SArvind Sankar si->ext_lfb_base = (u64)(unsigned long)fb_base >> 32; 1636327e6d0SArvind Sankar if (si->ext_lfb_base) 164fc372064SArd Biesheuvel si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE; 165fc372064SArd Biesheuvel 166fc372064SArd Biesheuvel si->pages = 1; 167fc372064SArd Biesheuvel 1686327e6d0SArvind Sankar setup_pixel_info(si, info->pixels_per_scan_line, 1696327e6d0SArvind Sankar info->pixel_information, info->pixel_format); 170fc372064SArd Biesheuvel 171fc372064SArd Biesheuvel si->lfb_size = si->lfb_linelength * si->lfb_height; 172fc372064SArd Biesheuvel 173fc372064SArd Biesheuvel si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; 1746fc3cec3SArvind Sankar 175dbd89c30SArvind Sankar return EFI_SUCCESS; 176fc372064SArd Biesheuvel } 177fc372064SArd Biesheuvel 178fc372064SArd Biesheuvel /* 179fc372064SArd Biesheuvel * See if we have Graphics Output Protocol 180fc372064SArd Biesheuvel */ 181cd33a5c1SArd Biesheuvel efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto, 182fc372064SArd Biesheuvel unsigned long size) 183fc372064SArd Biesheuvel { 184fc372064SArd Biesheuvel efi_status_t status; 185fc372064SArd Biesheuvel void **gop_handle = NULL; 186fc372064SArd Biesheuvel 187966291f6SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 188966291f6SArd Biesheuvel (void **)&gop_handle); 189fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 190fc372064SArd Biesheuvel return status; 191fc372064SArd Biesheuvel 192966291f6SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, proto, NULL, 193966291f6SArd Biesheuvel &size, gop_handle); 194fc372064SArd Biesheuvel if (status != EFI_SUCCESS) 195fc372064SArd Biesheuvel goto free_handle; 196fc372064SArd Biesheuvel 197cd33a5c1SArd Biesheuvel status = setup_gop(si, proto, size, gop_handle); 198fc372064SArd Biesheuvel 199fc372064SArd Biesheuvel free_handle: 200966291f6SArd Biesheuvel efi_bs_call(free_pool, gop_handle); 201fc372064SArd Biesheuvel return status; 202fc372064SArd Biesheuvel } 203