path: root/drivers/gpu/drm/radeon/radeon_device.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/console.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include <linux/vgaarb.h>
#include "radeon_reg.h"
#include "radeon.h"
#include "radeon_asic.h"
#include "atom.h"

/*
 * Clear GPU surface registers.
 */
void radeon_surface_init(struct radeon_device *rdev)
{
	/* FIXME: check this out */
	if (rdev->family < CHIP_R600) {
		int i;

		for (i = 0; i < 8; i++) {
			WREG32(RADEON_SURFACE0_INFO +
			       i * (RADEON_SURFACE1_INFO - RADEON_SURFACE0_INFO),
			       0);
		}
		/* enable surfaces */
		WREG32(RADEON_SURFACE_CNTL, 0);
	}
}

/*
 * GPU scratch registers helpers function.
 */
void radeon_scratch_init(struct radeon_device *rdev)
{
	int i;

	/* FIXME: check this out */
	if (rdev->family < CHIP_R300) {
		rdev->scratch.num_reg = 5;
	} else {
		rdev->scratch.num_reg = 7;
	}
	for (i = 0; i < rdev->scratch.num_reg; i++) {
		rdev->scratch.free[i] = true;
		rdev->scratch.reg[i] = RADEON_SCRATCH_REG0 + (i * 4);
	}
}

int radeon_scratch_get(struct radeon_device *rdev, uint32_t *reg)
{
	int i;

	for (i = 0; i < rdev->scratch.num_reg; i++) {
		if (rdev->scratch.free[i]) {
			rdev->scratch.free[i] = false;
			*reg = rdev->scratch.reg[i];
			return 0;
		}
	}
	return -EINVAL;
}

void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg)
{
	int i;

	for (i = 0; i < rdev->scratch.num_reg; i++) {
		if (rdev->scratch.reg[i] == reg) {
			rdev->scratch.free[i] = true;
			return;
		}
	}
}

/*
 * MC common functions
 */
int radeon_mc_setup(struct radeon_device *rdev)
{
	uint32_t tmp;

	/* Some chips have an "issue" with the memory controller, the
	 * location must be aligned to the size. We just align it down,
	 * too bad if we walk over the top of system memory, we don't
	 * use DMA without a remapped anyway.
	 * Affected chips are rv280, all r3xx, and all r4xx, but not IGP
	 */
	/* FGLRX seems to setup like this, VRAM a 0, then GART.
	 */
	/*
	 * Note: from R6xx the address space is 40bits but here we only
	 * use 32bits (still have to see a card which would exhaust 4G
	 * address space).
	 */
	if (rdev->mc.vram_location != 0xFFFFFFFFUL) {
		/* vram location was already setup try to put gtt after
		 * if it fits */
		tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size;
		tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc.gtt_size - 1);
		if ((0xFFFFFFFFUL - tmp) >= rdev->mc.gtt_size) {
			rdev->mc.gtt_location = tmp;
		} else {
			if (rdev->mc.gtt_size >= rdev->mc.vram_location) {
				printk(KERN_ERR "[drm] GTT too big to fit "
				       "before or after vram location.\n");
				return -EINVAL;
			}
			rdev->mc.gtt_location = 0;
		}
	} else if (rdev->mc.gtt_location != 0xFFFFFFFFUL) {
		/* gtt location was already setup try to put vram before
		 * if it fits */
		if (rdev->mc.mc_vram_size < rdev->mc.gtt_location) {
			rdev->mc.vram_location = 0;
		} else {
			tmp = rdev->mc.gtt_location + rdev->mc.gtt_size;
			tmp += (rdev->mc.mc_vram_size - 1);
			tmp &= ~(rdev->mc.mc_vram_size - 1);
			if ((0xFFFFFFFFUL - tmp) >= rdev->mc.mc_vram_size) {
				rdev->mc.vram_location = tmp;
			} else {
				printk(KERN_ERR "[drm] vram too big to fit "
				       "before or after GTT location.\n");
				return -EINVAL;
			}
		}
	} else {
		rdev->mc.vram_location = 0;
		tmp = rdev->mc.mc_vram_size;
		tmp = (tmp + rdev->mc.gtt_size - 1) & ~(rdev->mc</