coreboot-kgpe-d16/src/device/pci_rom.c

320 lines
9.0 KiB
C

/* 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 <string.h>
#include <cbfs.h>
#include <cbmem.h>
#include <acpi/acpigen.h>
/* Rmodules don't like weak symbols. */
void __weak map_oprom_vendev_rev(u32 *vendev, u8 *rev) { return; }
u32 __weak map_oprom_vendev(u32 vendev) { return vendev; }
struct rom_header *pci_rom_probe(const struct device *dev)
{
struct rom_header *rom_header = NULL;
struct pci_data *rom_data;
u8 rev = pci_read_config8(dev, PCI_REVISION_ID);
u8 mapped_rev = rev;
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. */
if (CONFIG(CHECK_REV_IN_OPROM_NAME)) {
rom_header = cbfs_boot_map_optionrom_revision(dev->vendor, dev->device, rev);
map_oprom_vendev_rev(&mapped_vendev, &mapped_rev);
} else {
rom_header = cbfs_boot_map_optionrom(dev->vendor, dev->device);
mapped_vendev = map_oprom_vendev(vendev);
}
if (!rom_header) {
if (CONFIG(CHECK_REV_IN_OPROM_NAME) &&
(vendev != mapped_vendev || rev != mapped_rev)) {
rom_header = cbfs_boot_map_optionrom_revision(
mapped_vendev >> 16,
mapped_vendev & 0xffff, mapped_rev);
} else if (vendev != mapped_vendev) {
rom_header = cbfs_boot_map_optionrom(
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)) {
printk(BIOS_DEBUG, "PCI Option ROM loading disabled for %s\n",
dev_path(dev));
return NULL;
} else {
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)
if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
rom_address = 0xc0000;
else
#endif
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;
}
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) {
#if !CONFIG(MULTIPLE_VGA_ADAPTERS)
extern struct device *vga_pri; /* Primary VGA device (device.c). */
if (dev != vga_pri) return NULL; /* Only one VGA supported. */
#endif
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))
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
pci_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, "pci_rom_acpi_fill_vfct failed\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->bus->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;
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_VENDOR_ID_ATI) {
acpi_vfct_t *vfct;
current = ALIGN_UP(current, 8);
vfct = (acpi_vfct_t *)current;
acpi_create_vfct(device, vfct, pci_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