From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB8D9C43465 for ; Fri, 18 Sep 2020 08:31:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F3E22084C for ; Fri, 18 Sep 2020 08:31:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Kx2lxZzu"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="l6i/VPLQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726658AbgIRIbT (ORCPT ); Fri, 18 Sep 2020 04:31:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56902 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726564AbgIRIbB (ORCPT ); Fri, 18 Sep 2020 04:31:01 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D012AC06174A; Fri, 18 Sep 2020 01:31:00 -0700 (PDT) Date: Fri, 18 Sep 2020 08:30:58 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1600417859; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=N96g2chz4ZXnA6vkwun8SIIeAB1fn7rUh7IfSKsEZrI=; b=Kx2lxZzulOqrr7T9Ojij4TAyNfknPQJ15NWE4YTAW8FLwcqKhEt7vjcY9gbARLMRTPLJeR ux/pc3Fu3nxpMRJJzu7mawXgy7wtw2eYEqIsAkfnwDqfQIZjP2IECfgVOom+HWkmDaacUE M4R04+o1BFvXfc05sQoaOCsD/h+60AMsdj65V7in81vNLTLUXH3OWObVbinXUG3fYn9gvQ hpir7yXd2INoDd0aqRBNAsL3LDlT7kFYTOGyiCRbfppfsn7AOHLjBppPUjV3yL9gsvzkw7 fRVclXRTTw1yceYZwqFxDZGWnhHmIh8clFVhn17oPEBOn0iK/Ylk/UwhhcGCbg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1600417859; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=N96g2chz4ZXnA6vkwun8SIIeAB1fn7rUh7IfSKsEZrI=; b=l6i/VPLQiGpCr0u+lGLLjPEL8WtjDdF5yPWx5HJ5yA0VA7JaU9qnzme76VH3lTTjKW3GI2 kmVx4spZKW1/PnAA== From: "tip-bot2 for Atish Patra" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: efi/core] efi: Rename arm-init to efi-init common for all arch Cc: Atish Patra , Ard Biesheuvel , x86 , LKML In-Reply-To: <20200819222425.30721-8-atish.patra@wdc.com> References: <20200819222425.30721-8-atish.patra@wdc.com> MIME-Version: 1.0 Message-ID: <160041785862.15536.1603313127636930368.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the efi/core branch of tip: Commit-ID: f30f242fb1319e616fbcf94a43195a1c57db99b8 Gitweb: https://git.kernel.org/tip/f30f242fb1319e616fbcf94a43195a1c57db99b8 Author: Atish Patra AuthorDate: Wed, 19 Aug 2020 15:24:23 -07:00 Committer: Ard Biesheuvel CommitterDate: Fri, 11 Sep 2020 09:31:07 +03:00 efi: Rename arm-init to efi-init common for all arch arm-init is responsible for setting up efi runtime and doesn't actually do any ARM specific stuff. RISC-V can use the same source code as it is. Rename it to efi-init so that RISC-V can use it. Signed-off-by: Atish Patra Link: https://lore.kernel.org/r/20200819222425.30721-8-atish.patra@wdc.com Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/Makefile | 2 +- drivers/firmware/efi/arm-init.c | 386 +------------------------------- drivers/firmware/efi/efi-init.c | 386 +++++++++++++++++++++++++++++++- 3 files changed, 387 insertions(+), 387 deletions(-) delete mode 100644 drivers/firmware/efi/arm-init.c create mode 100644 drivers/firmware/efi/efi-init.c diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index 7a21698..61fd1e8 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -32,7 +32,7 @@ obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE) += embedded-firmware.o fake_map-y += fake_mem.o fake_map-$(CONFIG_X86) += x86_fake_mem.o -arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o +arm-obj-$(CONFIG_EFI) := efi-init.o arm-runtime.o obj-$(CONFIG_ARM) += $(arm-obj-y) obj-$(CONFIG_ARM64) += $(arm-obj-y) obj-$(CONFIG_EFI_CAPSULE_LOADER) += capsule-loader.o diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c deleted file mode 100644 index 71c445d..0000000 --- a/drivers/firmware/efi/arm-init.c +++ /dev/null @@ -1,386 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Extensible Firmware Interface - * - * Based on Extensible Firmware Interface Specification version 2.4 - * - * Copyright (C) 2013 - 2015 Linaro Ltd. - */ - -#define pr_fmt(fmt) "efi: " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -static int __init is_memory(efi_memory_desc_t *md) -{ - if (md->attribute & (EFI_MEMORY_WB|EFI_MEMORY_WT|EFI_MEMORY_WC)) - return 1; - return 0; -} - -/* - * Translate a EFI virtual address into a physical address: this is necessary, - * as some data members of the EFI system table are virtually remapped after - * SetVirtualAddressMap() has been called. - */ -static phys_addr_t __init efi_to_phys(unsigned long addr) -{ - efi_memory_desc_t *md; - - for_each_efi_memory_desc(md) { - if (!(md->attribute & EFI_MEMORY_RUNTIME)) - continue; - if (md->virt_addr == 0) - /* no virtual mapping has been installed by the stub */ - break; - if (md->virt_addr <= addr && - (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT)) - return md->phys_addr + addr - md->virt_addr; - } - return addr; -} - -static __initdata unsigned long screen_info_table = EFI_INVALID_TABLE_ADDR; -static __initdata unsigned long cpu_state_table = EFI_INVALID_TABLE_ADDR; - -static const efi_config_table_type_t arch_tables[] __initconst = { - {LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID, &screen_info_table}, - {LINUX_EFI_ARM_CPU_STATE_TABLE_GUID, &cpu_state_table}, - {} -}; - -static void __init init_screen_info(void) -{ - struct screen_info *si; - - if (IS_ENABLED(CONFIG_ARM) && - screen_info_table != EFI_INVALID_TABLE_ADDR) { - si = early_memremap_ro(screen_info_table, sizeof(*si)); - if (!si) { - pr_err("Could not map screen_info config table\n"); - return; - } - screen_info = *si; - early_memunmap(si, sizeof(*si)); - - /* dummycon on ARM needs non-zero values for columns/lines */ - screen_info.orig_video_cols = 80; - screen_info.orig_video_lines = 25; - } - - if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && - memblock_is_map_memory(screen_info.lfb_base)) - memblock_mark_nomap(screen_info.lfb_base, screen_info.lfb_size); -} - -static int __init uefi_init(u64 efi_system_table) -{ - efi_config_table_t *config_tables; - efi_system_table_t *systab; - size_t table_size; - int retval; - - systab = early_memremap_ro(efi_system_table, sizeof(efi_system_table_t)); - if (systab == NULL) { - pr_warn("Unable to map EFI system table.\n"); - return -ENOMEM; - } - - set_bit(EFI_BOOT, &efi.flags); - if (IS_ENABLED(CONFIG_64BIT)) - set_bit(EFI_64BIT, &efi.flags); - - retval = efi_systab_check_header(&systab->hdr, 2); - if (retval) - goto out; - - efi.runtime = systab->runtime; - efi.runtime_version = systab->hdr.revision; - - efi_systab_report_header(&systab->hdr, efi_to_phys(systab->fw_vendor)); - - table_size = sizeof(efi_config_table_t) * systab->nr_tables; - config_tables = early_memremap_ro(efi_to_phys(systab->tables), - table_size); - if (config_tables == NULL) { - pr_warn("Unable to map EFI config table array.\n"); - retval = -ENOMEM; - goto out; - } - retval = efi_config_parse_tables(config_tables, systab->nr_tables, - IS_ENABLED(CONFIG_ARM) ? arch_tables - : NULL); - - early_memunmap(config_tables, table_size); -out: - early_memunmap(systab, sizeof(efi_system_table_t)); - return retval; -} - -/* - * Return true for regions that can be used as System RAM. - */ -static __init int is_usable_memory(efi_memory_desc_t *md) -{ - switch (md->type) { - case EFI_LOADER_CODE: - case EFI_LOADER_DATA: - case EFI_ACPI_RECLAIM_MEMORY: - case EFI_BOOT_SERVICES_CODE: - case EFI_BOOT_SERVICES_DATA: - case EFI_CONVENTIONAL_MEMORY: - case EFI_PERSISTENT_MEMORY: - /* - * Special purpose memory is 'soft reserved', which means it - * is set aside initially, but can be hotplugged back in or - * be assigned to the dax driver after boot. - */ - if (efi_soft_reserve_enabled() && - (md->attribute & EFI_MEMORY_SP)) - return false; - - /* - * According to the spec, these regions are no longer reserved - * after calling ExitBootServices(). However, we can only use - * them as System RAM if they can be mapped writeback cacheable. - */ - return (md->attribute & EFI_MEMORY_WB); - default: - break; - } - return false; -} - -static __init void reserve_regions(void) -{ - efi_memory_desc_t *md; - u64 paddr, npages, size; - - if (efi_enabled(EFI_DBG)) - pr_info("Processing EFI memory map:\n"); - - /* - * Discard memblocks discovered so far: if there are any at this - * point, they originate from memory nodes in the DT, and UEFI - * uses its own memory map instead. - */ - memblock_dump_all(); - memblock_remove(0, PHYS_ADDR_MAX); - - for_each_efi_memory_desc(md) { - paddr = md->phys_addr; - npages = md->num_pages; - - if (efi_enabled(EFI_DBG)) { - char buf[64]; - - pr_info(" 0x%012llx-0x%012llx %s\n", - paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1, - efi_md_typeattr_format(buf, sizeof(buf), md)); - } - - memrange_efi_to_native(&paddr, &npages); - size = npages << PAGE_SHIFT; - - if (is_memory(md)) { - early_init_dt_add_memory_arch(paddr, size); - - if (!is_usable_memory(md)) - memblock_mark_nomap(paddr, size); - - /* keep ACPI reclaim memory intact for kexec etc. */ - if (md->type == EFI_ACPI_RECLAIM_MEMORY) - memblock_reserve(paddr, size); - } - } -} - -void __init efi_init(void) -{ - struct efi_memory_map_data data; - u64 efi_system_table; - - /* Grab UEFI information placed in FDT by stub */ - efi_system_table = efi_get_fdt_params(&data); - if (!efi_system_table) - return; - - if (efi_memmap_init_early(&data) < 0) { - /* - * If we are booting via UEFI, the UEFI memory map is the only - * description of memory we have, so there is little point in - * proceeding if we cannot access it. - */ - panic("Unable to map EFI memory map.\n"); - } - - WARN(efi.memmap.desc_version != 1, - "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", - efi.memmap.desc_version); - - if (uefi_init(efi_system_table) < 0) { - efi_memmap_unmap(); - return; - } - - reserve_regions(); - efi_esrt_init(); - - memblock_reserve(data.phys_map & PAGE_MASK, - PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); - - init_screen_info(); - -#ifdef CONFIG_ARM - /* ARM does not permit early mappings to persist across paging_init() */ - efi_memmap_unmap(); - - if (cpu_state_table != EFI_INVALID_TABLE_ADDR) { - struct efi_arm_entry_state *state; - bool dump_state = true; - - state = early_memremap_ro(cpu_state_table, - sizeof(struct efi_arm_entry_state)); - if (state == NULL) { - pr_warn("Unable to map CPU entry state table.\n"); - return; - } - - if ((state->sctlr_before_ebs & 1) == 0) - pr_warn(FW_BUG "EFI stub was entered with MMU and Dcache disabled, please fix your firmware!\n"); - else if ((state->sctlr_after_ebs & 1) == 0) - pr_warn(FW_BUG "ExitBootServices() returned with MMU and Dcache disabled, please fix your firmware!\n"); - else - dump_state = false; - - if (dump_state || efi_enabled(EFI_DBG)) { - pr_info("CPSR at EFI stub entry : 0x%08x\n", state->cpsr_before_ebs); - pr_info("SCTLR at EFI stub entry : 0x%08x\n", state->sctlr_before_ebs); - pr_info("CPSR after ExitBootServices() : 0x%08x\n", state->cpsr_after_ebs); - pr_info("SCTLR after ExitBootServices(): 0x%08x\n", state->sctlr_after_ebs); - } - early_memunmap(state, sizeof(struct efi_arm_entry_state)); - } -#endif -} - -static bool efifb_overlaps_pci_range(const struct of_pci_range *range) -{ - u64 fb_base = screen_info.lfb_base; - - if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32; - - return fb_base >= range->cpu_addr && - fb_base < (range->cpu_addr + range->size); -} - -static struct device_node *find_pci_overlap_node(void) -{ - struct device_node *np; - - for_each_node_by_type(np, "pci") { - struct of_pci_range_parser parser; - struct of_pci_range range; - int err; - - err = of_pci_range_parser_init(&parser, np); - if (err) { - pr_warn("of_pci_range_parser_init() failed: %d\n", err); - continue; - } - - for_each_of_pci_range(&parser, &range) - if (efifb_overlaps_pci_range(&range)) - return np; - } - return NULL; -} - -/* - * If the efifb framebuffer is backed by a PCI graphics controller, we have - * to ensure that this relation is expressed using a device link when - * running in DT mode, or the probe order may be reversed, resulting in a - * resource reservation conflict on the memory window that the efifb - * framebuffer steals from the PCIe host bridge. - */ -static int efifb_add_links(const struct fwnode_handle *fwnode, - struct device *dev) -{ - struct device_node *sup_np; - struct device *sup_dev; - - sup_np = find_pci_overlap_node(); - - /* - * If there's no PCI graphics controller backing the efifb, we are - * done here. - */ - if (!sup_np) - return 0; - - sup_dev = get_dev_from_fwnode(&sup_np->fwnode); - of_node_put(sup_np); - - /* - * Return -ENODEV if the PCI graphics controller device hasn't been - * registered yet. This ensures that efifb isn't allowed to probe - * and this function is retried again when new devices are - * registered. - */ - if (!sup_dev) - return -ENODEV; - - /* - * If this fails, retrying this function at a later point won't - * change anything. So, don't return an error after this. - */ - if (!device_link_add(dev, sup_dev, fw_devlink_get_flags())) - dev_warn(dev, "device_link_add() failed\n"); - - put_device(sup_dev); - - return 0; -} - -static const struct fwnode_operations efifb_fwnode_ops = { - .add_links = efifb_add_links, -}; - -static struct fwnode_handle efifb_fwnode = { - .ops = &efifb_fwnode_ops, -}; - -static int __init register_gop_device(void) -{ - struct platform_device *pd; - int err; - - if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) - return 0; - - pd = platform_device_alloc("efi-framebuffer", 0); - if (!pd) - return -ENOMEM; - - if (IS_ENABLED(CONFIG_PCI)) - pd->dev.fwnode = &efifb_fwnode; - - err = platform_device_add_data(pd, &screen_info, sizeof(screen_info)); - if (err) - return err; - - return platform_device_add(pd); -} -subsys_initcall(register_gop_device); diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-init.c new file mode 100644 index 0000000..71c445d --- /dev/null +++ b/drivers/firmware/efi/efi-init.c @@ -0,0 +1,386 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Extensible Firmware Interface + * + * Based on Extensible Firmware Interface Specification version 2.4 + * + * Copyright (C) 2013 - 2015 Linaro Ltd. + */ + +#define pr_fmt(fmt) "efi: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static int __init is_memory(efi_memory_desc_t *md) +{ + if (md->attribute & (EFI_MEMORY_WB|EFI_MEMORY_WT|EFI_MEMORY_WC)) + return 1; + return 0; +} + +/* + * Translate a EFI virtual address into a physical address: this is necessary, + * as some data members of the EFI system table are virtually remapped after + * SetVirtualAddressMap() has been called. + */ +static phys_addr_t __init efi_to_phys(unsigned long addr) +{ + efi_memory_desc_t *md; + + for_each_efi_memory_desc(md) { + if (!(md->attribute & EFI_MEMORY_RUNTIME)) + continue; + if (md->virt_addr == 0) + /* no virtual mapping has been installed by the stub */ + break; + if (md->virt_addr <= addr && + (addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT)) + return md->phys_addr + addr - md->virt_addr; + } + return addr; +} + +static __initdata unsigned long screen_info_table = EFI_INVALID_TABLE_ADDR; +static __initdata unsigned long cpu_state_table = EFI_INVALID_TABLE_ADDR; + +static const efi_config_table_type_t arch_tables[] __initconst = { + {LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID, &screen_info_table}, + {LINUX_EFI_ARM_CPU_STATE_TABLE_GUID, &cpu_state_table}, + {} +}; + +static void __init init_screen_info(void) +{ + struct screen_info *si; + + if (IS_ENABLED(CONFIG_ARM) && + screen_info_table != EFI_INVALID_TABLE_ADDR) { + si = early_memremap_ro(screen_info_table, sizeof(*si)); + if (!si) { + pr_err("Could not map screen_info config table\n"); + return; + } + screen_info = *si; + early_memunmap(si, sizeof(*si)); + + /* dummycon on ARM needs non-zero values for columns/lines */ + screen_info.orig_video_cols = 80; + screen_info.orig_video_lines = 25; + } + + if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && + memblock_is_map_memory(screen_info.lfb_base)) + memblock_mark_nomap(screen_info.lfb_base, screen_info.lfb_size); +} + +static int __init uefi_init(u64 efi_system_table) +{ + efi_config_table_t *config_tables; + efi_system_table_t *systab; + size_t table_size; + int retval; + + systab = early_memremap_ro(efi_system_table, sizeof(efi_system_table_t)); + if (systab == NULL) { + pr_warn("Unable to map EFI system table.\n"); + return -ENOMEM; + } + + set_bit(EFI_BOOT, &efi.flags); + if (IS_ENABLED(CONFIG_64BIT)) + set_bit(EFI_64BIT, &efi.flags); + + retval = efi_systab_check_header(&systab->hdr, 2); + if (retval) + goto out; + + efi.runtime = systab->runtime; + efi.runtime_version = systab->hdr.revision; + + efi_systab_report_header(&systab->hdr, efi_to_phys(systab->fw_vendor)); + + table_size = sizeof(efi_config_table_t) * systab->nr_tables; + config_tables = early_memremap_ro(efi_to_phys(systab->tables), + table_size); + if (config_tables == NULL) { + pr_warn("Unable to map EFI config table array.\n"); + retval = -ENOMEM; + goto out; + } + retval = efi_config_parse_tables(config_tables, systab->nr_tables, + IS_ENABLED(CONFIG_ARM) ? arch_tables + : NULL); + + early_memunmap(config_tables, table_size); +out: + early_memunmap(systab, sizeof(efi_system_table_t)); + return retval; +} + +/* + * Return true for regions that can be used as System RAM. + */ +static __init int is_usable_memory(efi_memory_desc_t *md) +{ + switch (md->type) { + case EFI_LOADER_CODE: + case EFI_LOADER_DATA: + case EFI_ACPI_RECLAIM_MEMORY: + case EFI_BOOT_SERVICES_CODE: + case EFI_BOOT_SERVICES_DATA: + case EFI_CONVENTIONAL_MEMORY: + case EFI_PERSISTENT_MEMORY: + /* + * Special purpose memory is 'soft reserved', which means it + * is set aside initially, but can be hotplugged back in or + * be assigned to the dax driver after boot. + */ + if (efi_soft_reserve_enabled() && + (md->attribute & EFI_MEMORY_SP)) + return false; + + /* + * According to the spec, these regions are no longer reserved + * after calling ExitBootServices(). However, we can only use + * them as System RAM if they can be mapped writeback cacheable. + */ + return (md->attribute & EFI_MEMORY_WB); + default: + break; + } + return false; +} + +static __init void reserve_regions(void) +{ + efi_memory_desc_t *md; + u64 paddr, npages, size; + + if (efi_enabled(EFI_DBG)) + pr_info("Processing EFI memory map:\n"); + + /* + * Discard memblocks discovered so far: if there are any at this + * point, they originate from memory nodes in the DT, and UEFI + * uses its own memory map instead. + */ + memblock_dump_all(); + memblock_remove(0, PHYS_ADDR_MAX); + + for_each_efi_memory_desc(md) { + paddr = md->phys_addr; + npages = md->num_pages; + + if (efi_enabled(EFI_DBG)) { + char buf[64]; + + pr_info(" 0x%012llx-0x%012llx %s\n", + paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1, + efi_md_typeattr_format(buf, sizeof(buf), md)); + } + + memrange_efi_to_native(&paddr, &npages); + size = npages << PAGE_SHIFT; + + if (is_memory(md)) { + early_init_dt_add_memory_arch(paddr, size); + + if (!is_usable_memory(md)) + memblock_mark_nomap(paddr, size); + + /* keep ACPI reclaim memory intact for kexec etc. */ + if (md->type == EFI_ACPI_RECLAIM_MEMORY) + memblock_reserve(paddr, size); + } + } +} + +void __init efi_init(void) +{ + struct efi_memory_map_data data; + u64 efi_system_table; + + /* Grab UEFI information placed in FDT by stub */ + efi_system_table = efi_get_fdt_params(&data); + if (!efi_system_table) + return; + + if (efi_memmap_init_early(&data) < 0) { + /* + * If we are booting via UEFI, the UEFI memory map is the only + * description of memory we have, so there is little point in + * proceeding if we cannot access it. + */ + panic("Unable to map EFI memory map.\n"); + } + + WARN(efi.memmap.desc_version != 1, + "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", + efi.memmap.desc_version); + + if (uefi_init(efi_system_table) < 0) { + efi_memmap_unmap(); + return; + } + + reserve_regions(); + efi_esrt_init(); + + memblock_reserve(data.phys_map & PAGE_MASK, + PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); + + init_screen_info(); + +#ifdef CONFIG_ARM + /* ARM does not permit early mappings to persist across paging_init() */ + efi_memmap_unmap(); + + if (cpu_state_table != EFI_INVALID_TABLE_ADDR) { + struct efi_arm_entry_state *state; + bool dump_state = true; + + state = early_memremap_ro(cpu_state_table, + sizeof(struct efi_arm_entry_state)); + if (state == NULL) { + pr_warn("Unable to map CPU entry state table.\n"); + return; + } + + if ((state->sctlr_before_ebs & 1) == 0) + pr_warn(FW_BUG "EFI stub was entered with MMU and Dcache disabled, please fix your firmware!\n"); + else if ((state->sctlr_after_ebs & 1) == 0) + pr_warn(FW_BUG "ExitBootServices() returned with MMU and Dcache disabled, please fix your firmware!\n"); + else + dump_state = false; + + if (dump_state || efi_enabled(EFI_DBG)) { + pr_info("CPSR at EFI stub entry : 0x%08x\n", state->cpsr_before_ebs); + pr_info("SCTLR at EFI stub entry : 0x%08x\n", state->sctlr_before_ebs); + pr_info("CPSR after ExitBootServices() : 0x%08x\n", state->cpsr_after_ebs); + pr_info("SCTLR after ExitBootServices(): 0x%08x\n", state->sctlr_after_ebs); + } + early_memunmap(state, sizeof(struct efi_arm_entry_state)); + } +#endif +} + +static bool efifb_overlaps_pci_range(const struct of_pci_range *range) +{ + u64 fb_base = screen_info.lfb_base; + + if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32; + + return fb_base >= range->cpu_addr && + fb_base < (range->cpu_addr + range->size); +} + +static struct device_node *find_pci_overlap_node(void) +{ + struct device_node *np; + + for_each_node_by_type(np, "pci") { + struct of_pci_range_parser parser; + struct of_pci_range range; + int err; + + err = of_pci_range_parser_init(&parser, np); + if (err) { + pr_warn("of_pci_range_parser_init() failed: %d\n", err); + continue; + } + + for_each_of_pci_range(&parser, &range) + if (efifb_overlaps_pci_range(&range)) + return np; + } + return NULL; +} + +/* + * If the efifb framebuffer is backed by a PCI graphics controller, we have + * to ensure that this relation is expressed using a device link when + * running in DT mode, or the probe order may be reversed, resulting in a + * resource reservation conflict on the memory window that the efifb + * framebuffer steals from the PCIe host bridge. + */ +static int efifb_add_links(const struct fwnode_handle *fwnode, + struct device *dev) +{ + struct device_node *sup_np; + struct device *sup_dev; + + sup_np = find_pci_overlap_node(); + + /* + * If there's no PCI graphics controller backing the efifb, we are + * done here. + */ + if (!sup_np) + return 0; + + sup_dev = get_dev_from_fwnode(&sup_np->fwnode); + of_node_put(sup_np); + + /* + * Return -ENODEV if the PCI graphics controller device hasn't been + * registered yet. This ensures that efifb isn't allowed to probe + * and this function is retried again when new devices are + * registered. + */ + if (!sup_dev) + return -ENODEV; + + /* + * If this fails, retrying this function at a later point won't + * change anything. So, don't return an error after this. + */ + if (!device_link_add(dev, sup_dev, fw_devlink_get_flags())) + dev_warn(dev, "device_link_add() failed\n"); + + put_device(sup_dev); + + return 0; +} + +static const struct fwnode_operations efifb_fwnode_ops = { + .add_links = efifb_add_links, +}; + +static struct fwnode_handle efifb_fwnode = { + .ops = &efifb_fwnode_ops, +}; + +static int __init register_gop_device(void) +{ + struct platform_device *pd; + int err; + + if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) + return 0; + + pd = platform_device_alloc("efi-framebuffer", 0); + if (!pd) + return -ENOMEM; + + if (IS_ENABLED(CONFIG_PCI)) + pd->dev.fwnode = &efifb_fwnode; + + err = platform_device_add_data(pd, &screen_info, sizeof(screen_info)); + if (err) + return err; + + return platform_device_add(pd); +} +subsys_initcall(register_gop_device);