/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <commonlib/endian.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <device/pci_ops.h> #include <stdio.h> #include <string.h> #include <cbfs.h> #include <cbmem.h> #include <acpi/acpigen.h> /* Rmodules don't like weak symbols. */ u32 __weak map_oprom_vendev(u32 vendev) { return vendev; } void vga_oprom_preload(void) { /* The CONFIG_VGA_BIOS_ID symbol is only defined when VGA_BIOS is selected */ #if CONFIG(VGA_BIOS) const char name[] = "pci" CONFIG_VGA_BIOS_ID ".rom"; if (!CONFIG(CBFS_PRELOAD)) return; printk(BIOS_DEBUG, "Preloading VGA ROM %s\n", name); cbfs_preload(name); #endif } static void *cbfs_boot_map_optionrom(uint16_t vendor, uint16_t device) { char name[17] = "pciXXXX,XXXX.rom"; snprintf(name, sizeof(name), "pci%04hx,%04hx.rom", vendor, device); return cbfs_map(name, NULL); } struct rom_header *pci_rom_probe(const struct device *dev) { struct rom_header *rom_header = NULL; struct pci_data *rom_data; u32 vendev = (dev->vendor << 16) | dev->device; u32 mapped_vendev = vendev; /* If the ROM is in flash, then don't check the PCI device for it. */ mapped_vendev = map_oprom_vendev(vendev); rom_header = cbfs_boot_map_optionrom(mapped_vendev >> 16, mapped_vendev & 0xffff); /* Handle the case of VGA_BIOS_ID not being set to the remapped PCI ID. This is a workaround that should be removed once the underlying issue is fixed. */ if (!rom_header && vendev != mapped_vendev) { rom_header = cbfs_boot_map_optionrom(vendev >> 16, vendev & 0xffff); if (rom_header) { printk(BIOS_NOTICE, "VGA_BIOS_ID should be the remapped PCI ID " "%04hx,%04hx in the VBIOS file\n", mapped_vendev >> 16, mapped_vendev & 0xffff); } } if (rom_header) { printk(BIOS_DEBUG, "In CBFS, ROM address for %s = %p\n", dev_path(dev), rom_header); } else if (CONFIG(ON_DEVICE_ROM_LOAD)) { uintptr_t rom_address; rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS); if (rom_address == 0x00000000 || rom_address == 0xffffffff) { if (CONFIG(CPU_QEMU_X86) && (dev->class >> 8) == PCI_CLASS_DISPLAY_VGA) rom_address = 0xc0000; else return NULL; } else { /* Enable expansion ROM address decoding. */ pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address|PCI_ROM_ADDRESS_ENABLE); } rom_address &= PCI_ROM_ADDRESS_MASK; printk(BIOS_DEBUG, "Option ROM address for %s = %lx\n", dev_path(dev), (unsigned long)rom_address); rom_header = (struct rom_header *)rom_address; } else { printk(BIOS_DEBUG, "PCI Option ROM loading disabled for %s\n", dev_path(dev)); return NULL; } printk(BIOS_SPEW, "PCI expansion ROM, signature 0x%04x, INIT size 0x%04x, data ptr 0x%04x\n", le32_to_cpu(rom_header->signature), rom_header->size * 512, le32_to_cpu(rom_header->data)); if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) { printk(BIOS_ERR, "Incorrect expansion ROM header signature %04x\n", le32_to_cpu(rom_header->signature)); return NULL; } rom_data = (((void *)rom_header) + le32_to_cpu(rom_header->data)); printk(BIOS_SPEW, "PCI ROM image, vendor ID %04x, device ID %04x,\n", rom_data->vendor, rom_data->device); /* If the device id is mapped, a mismatch is expected */ if ((dev->vendor != rom_data->vendor || dev->device != rom_data->device) && (vendev == mapped_vendev)) { printk(BIOS_ERR, "ID mismatch: vendor ID %04x, device ID %04x\n", dev->vendor, dev->device); return NULL; } printk(BIOS_SPEW, "PCI ROM image, Class Code %04x%02x, Code Type %02x\n", rom_data->class_hi, rom_data->class_lo, rom_data->type); if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) { printk(BIOS_DEBUG, "Class Code mismatch ROM %08x, dev %08x\n", (rom_data->class_hi << 8) | rom_data->class_lo, dev->class); // return NULL; } return rom_header; } static void *pci_ram_image_start = (void *)PCI_RAM_IMAGE_START; struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header) { struct pci_data * rom_data; unsigned int rom_size; unsigned int image_size=0; do { /* Get next image. */ rom_header = (struct rom_header *)((void *)rom_header + image_size); rom_data = (struct pci_data *)((void *)rom_header + le32_to_cpu(rom_header->data)); image_size = le32_to_cpu(rom_data->ilen) * 512; } while ((rom_data->type != 0) && (rom_data->indicator != 0)); // make sure we got x86 version if (rom_data->type != 0) return NULL; rom_size = rom_header->size * 512; /* * We check to see if the device thinks it is a VGA device not * whether the ROM image is for a VGA device because some * devices have a mismatch between the hardware and the ROM. */ if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA) { extern struct device *vga_pri; /* Primary VGA device (device.c). */ if (dev != vga_pri) return NULL; /* Only one VGA supported. */ if ((void *)PCI_VGA_RAM_IMAGE_START != rom_header) { printk(BIOS_DEBUG, "Copying VGA ROM Image from %p to 0x%x, 0x%x bytes\n", rom_header, PCI_VGA_RAM_IMAGE_START, rom_size); memcpy((void *)PCI_VGA_RAM_IMAGE_START, rom_header, rom_size); } return (struct rom_header *)(PCI_VGA_RAM_IMAGE_START); } printk(BIOS_DEBUG, "Copying non-VGA ROM image from %p to %p, 0x%x bytes\n", rom_header, pci_ram_image_start, rom_size); memcpy(pci_ram_image_start, rom_header, rom_size); pci_ram_image_start += rom_size; return (struct rom_header *)(pci_ram_image_start-rom_size); } /* ACPI */ #if CONFIG(HAVE_ACPI_TABLES) /* VBIOS may be modified after oprom init so use the copy if present. */ static struct rom_header *check_initialized(const struct device *dev) { struct rom_header *run_rom; struct pci_data *rom_data; if (!CONFIG(VGA_ROM_RUN) && !CONFIG(RUN_FSP_GOP)) return NULL; run_rom = (struct rom_header *)(uintptr_t)PCI_VGA_RAM_IMAGE_START; if (read_le16(&run_rom->signature) != PCI_ROM_HDR) return NULL; rom_data = (struct pci_data *)((u8 *)run_rom + read_le16(&run_rom->data)); if (read_le32(&rom_data->signature) == PCI_DATA_HDR && read_le16(&rom_data->device) == dev->device && read_le16(&rom_data->vendor) == dev->vendor) return run_rom; else return NULL; } static unsigned long ati_rom_acpi_fill_vfct(const struct device *device, acpi_vfct_t *vfct_struct, unsigned long current) { acpi_vfct_image_hdr_t *header = &vfct_struct->image_hdr; struct rom_header *rom; rom = check_initialized(device); if (!rom) rom = pci_rom_probe(device); if (!rom) { printk(BIOS_ERR, "%s failed\n", __func__); return current; } if (device->upstream->segment_group) { printk(BIOS_ERR, "VFCT only supports GPU in first PCI segment group.\n"); return current; } printk(BIOS_DEBUG, " Copying %sVBIOS image from %p\n", rom == (struct rom_header *) (uintptr_t)PCI_VGA_RAM_IMAGE_START ? "initialized " : "", rom); header->DeviceID = device->device; header->VendorID = device->vendor; header->PCIBus = device->upstream->secondary; header->PCIFunction = PCI_FUNC(device->path.pci.devfn); header->PCIDevice = PCI_SLOT(device->path.pci.devfn); header->ImageLength = rom->size * 512; memcpy((void *)header->VbiosContent, rom, header->ImageLength); vfct_struct->VBIOSImageOffset = (size_t)header - (size_t)vfct_struct; /* Calculate and set checksum for VBIOS data if FSP GOP driver used, Since GOP driver modifies ATOMBIOS tables at end of VBIOS */ if (CONFIG(RUN_FSP_GOP)) { /* Clear existing checksum before recalculating */ header->VbiosContent[VFCT_VBIOS_CHECKSUM_OFFSET] = 0; header->VbiosContent[VFCT_VBIOS_CHECKSUM_OFFSET] = acpi_checksum(header->VbiosContent, header->ImageLength); } current += header->ImageLength; return current; } unsigned long pci_rom_write_acpi_tables(const struct device *device, unsigned long current, struct acpi_rsdp *rsdp) { /* Only handle VGA devices */ if ((device->class >> 8) != PCI_CLASS_DISPLAY_VGA) return current; /* Only handle enabled devices */ if (!device->enabled) return current; /* AMD/ATI uses VFCT */ if (device->vendor == PCI_VID_ATI) { acpi_vfct_t *vfct; current = ALIGN_UP(current, 8); vfct = (acpi_vfct_t *)current; acpi_create_vfct(device, vfct, ati_rom_acpi_fill_vfct); if (vfct->header.length) { printk(BIOS_DEBUG, "ACPI: * VFCT at %lx\n", current); current += vfct->header.length; acpi_add_table(rsdp, vfct); } } return current; } void pci_rom_ssdt(const struct device *device) { static size_t ngfx; /* Only handle display devices */ if ((device->class >> 16) != PCI_BASE_CLASS_DISPLAY) return; /* Only handle enabled devices */ if (!device->enabled) return; /* Probe for option rom */ const struct rom_header *rom = pci_rom_probe(device); if (!rom || !rom->size) { printk(BIOS_WARNING, "%s: Missing PCI Option ROM\n", dev_path(device)); return; } const char *scope = acpi_device_path(device); if (!scope) { printk(BIOS_ERR, "%s: Missing ACPI scope\n", dev_path(device)); return; } /* Supports up to four devices. */ if ((CBMEM_ID_ROM0 + ngfx) > CBMEM_ID_ROM3) { printk(BIOS_ERR, "%s: Out of CBMEM IDs.\n", dev_path(device)); return; } /* Prepare memory */ const size_t cbrom_length = rom->size * 512; if (!cbrom_length) { printk(BIOS_ERR, "%s: ROM has zero length!\n", dev_path(device)); return; } void *cbrom = cbmem_add(CBMEM_ID_ROM0 + ngfx, cbrom_length); if (!cbrom) { printk(BIOS_ERR, "%s: Failed to allocate CBMEM.\n", dev_path(device)); return; } /* Increment CBMEM id for next device */ ngfx++; memcpy(cbrom, rom, cbrom_length); /* write _ROM method */ acpigen_write_scope(scope); acpigen_write_rom(cbrom, cbrom_length); acpigen_pop_len(); /* pop scope */ } #endif