linux/drivers/gpu/drm/radeon/radeon_bios.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */

#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/slab.h>

#include <drm/drm_device.h>

#include "atom.h"
#include "radeon.h"
#include "radeon_reg.h"

/*
 * BIOS.
 */

/* If you boot an IGP board with a discrete card as the primary,
 * the IGP rom is not accessible via the rom bar as the IGP rom is
 * part of the system bios.  On boot, the system bios puts a
 * copy of the igp rom at the start of vram if a discrete card is
 * present.
 */
static bool igp_read_bios_from_vram(struct radeon_device *rdev)
{ … }

static bool radeon_read_bios(struct radeon_device *rdev)
{ … }

static bool radeon_read_platform_bios(struct radeon_device *rdev)
{ … }

#ifdef CONFIG_ACPI
/* ATRM is used to get the BIOS on the discrete cards in
 * dual-gpu systems.
 */
/* retrieve the ROM in 4k blocks */
#define ATRM_BIOS_PAGE …
/**
 * radeon_atrm_call - fetch a chunk of the vbios
 *
 * @atrm_handle: acpi ATRM handle
 * @bios: vbios image pointer
 * @offset: offset of vbios image data to fetch
 * @len: length of vbios image data to fetch
 *
 * Executes ATRM to fetch a chunk of the discrete
 * vbios image on PX systems (all asics).
 * Returns the length of the buffer fetched.
 */
static int radeon_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
			    int offset, int len)
{ … }

static bool radeon_atrm_get_bios(struct radeon_device *rdev)
{ … }
#else
static inline bool radeon_atrm_get_bios(struct radeon_device *rdev)
{
	return false;
}
#endif

static bool ni_read_disabled_bios(struct radeon_device *rdev)
{ … }

static bool r700_read_disabled_bios(struct radeon_device *rdev)
{ … }

static bool r600_read_disabled_bios(struct radeon_device *rdev)
{ … }

static bool avivo_read_disabled_bios(struct radeon_device *rdev)
{ … }

static bool legacy_read_disabled_bios(struct radeon_device *rdev)
{ … }

static bool radeon_read_disabled_bios(struct radeon_device *rdev)
{ … }

#ifdef CONFIG_ACPI
static bool radeon_acpi_vfct_bios(struct radeon_device *rdev)
{ … }
#else
static inline bool radeon_acpi_vfct_bios(struct radeon_device *rdev)
{
	return false;
}
#endif

bool radeon_get_bios(struct radeon_device *rdev)
{ … }