drm/radeon/kms: move around new init path code to avoid posting at init

[safe/jmp/linux-2.6] / drivers / gpu / drm / radeon / r600.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/seq_file.h>
#include <linux/firmware.h>
#include <linux/platform_device.h>
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon.h"
#include "radeon_mode.h"
#include "r600d.h"
#include "avivod.h"
#include "atom.h"

#define PFP_UCODE_SIZE 576
#define PM4_UCODE_SIZE 1792
#define R700_PFP_UCODE_SIZE 848
#define R700_PM4_UCODE_SIZE 1360

/* Firmware Names */
MODULE_FIRMWARE("radeon/R600_pfp.bin");
MODULE_FIRMWARE("radeon/R600_me.bin");
MODULE_FIRMWARE("radeon/RV610_pfp.bin");
MODULE_FIRMWARE("radeon/RV610_me.bin");
MODULE_FIRMWARE("radeon/RV630_pfp.bin");
MODULE_FIRMWARE("radeon/RV630_me.bin");
MODULE_FIRMWARE("radeon/RV620_pfp.bin");
MODULE_FIRMWARE("radeon/RV620_me.bin");
MODULE_FIRMWARE("radeon/RV635_pfp.bin");
MODULE_FIRMWARE("radeon/RV635_me.bin");
MODULE_FIRMWARE("radeon/RV670_pfp.bin");
MODULE_FIRMWARE("radeon/RV670_me.bin");
MODULE_FIRMWARE("radeon/RS780_pfp.bin");
MODULE_FIRMWARE("radeon/RS780_me.bin");
MODULE_FIRMWARE("radeon/RV770_pfp.bin");
MODULE_FIRMWARE("radeon/RV770_me.bin");
MODULE_FIRMWARE("radeon/RV730_pfp.bin");
MODULE_FIRMWARE("radeon/RV730_me.bin");
MODULE_FIRMWARE("radeon/RV710_pfp.bin");
MODULE_FIRMWARE("radeon/RV710_me.bin");

int r600_debugfs_mc_info_init(struct radeon_device *rdev);

/* This files gather functions specifics to:
 * r600,rv610,rv630,rv620,rv635,rv670
 *
 * Some of these functions might be used by newer ASICs.
 */
int r600_mc_wait_for_idle(struct radeon_device *rdev);
void r600_gpu_init(struct radeon_device *rdev);
void r600_fini(struct radeon_device *rdev);


/*
 * R600 PCIE GART
 */
int r600_gart_clear_page(struct radeon_device *rdev, int i)
{
        void __iomem *ptr = (void *)rdev->gart.table.vram.ptr;
        u64 pte;

        if (i < 0 || i > rdev->gart.num_gpu_pages)
                return -EINVAL;
        pte = 0;
        writeq(pte, ((void __iomem *)ptr) + (i * 8));
        return 0;
}

void r600_pcie_gart_tlb_flush(struct radeon_device *rdev)
{
        unsigned i;
        u32 tmp;

        WREG32(VM_CONTEXT0_INVALIDATION_LOW_ADDR, rdev->mc.gtt_start >> 12);
        WREG32(VM_CONTEXT0_INVALIDATION_HIGH_ADDR, (rdev->mc.gtt_end - 1) >> 12);
        WREG32(VM_CONTEXT0_REQUEST_RESPONSE, REQUEST_TYPE(1));
        for (i = 0; i < rdev->usec_timeout; i++) {
                /* read MC_STATUS */
                tmp = RREG32(VM_CONTEXT0_REQUEST_RESPONSE);
                tmp = (tmp & RESPONSE_TYPE_MASK) >> RESPONSE_TYPE_SHIFT;
                if (tmp == 2) {
                        printk(KERN_WARNING "[drm] r600 flush TLB failed\n");
                        return;
                }
                if (tmp) {
                        return;
                }
                udelay(1);
        }
}

int r600_pcie_gart_init(struct radeon_device *rdev)
{
        int r;

        if (rdev->gart.table.vram.robj) {
                WARN(1, "R600 PCIE GART already initialized.\n");
                return 0;
        }
        /* Initialize common gart structure */
        r = radeon_gart_init(rdev);
        if (r)
                return r;
        rdev->gart.table_size = rdev->gart.num_gpu_pages * 8;
        return radeon_gart_table_vram_alloc(rdev);
}

int r600_pcie_gart_enable(struct radeon_device *rdev)
{
        u32 tmp;
        int r, i;

        if (rdev->gart.table.vram.robj == NULL) {
                dev_err(rdev->dev, "No VRAM object for PCIE GART.\n");
                return -EINVAL;
        }
        r = radeon_gart_table_vram_pin(rdev);
        if (r)
                return r;

        /* Setup L2 cache */
        WREG32(VM_L2_CNTL, ENABLE_L2_CACHE | ENABLE_L2_FRAGMENT_PROCESSING |
                                ENABLE_L2_PTE_CACHE_LRU_UPDATE_BY_WRITE |
                                EFFECTIVE_L2_QUEUE_SIZE(7));
        WREG32(VM_L2_CNTL2, 0);
        WREG32(VM_L2_CNTL3, BANK_SELECT_0(0) | BANK_SELECT_1(1));
        /* Setup TLB control */
        tmp = ENABLE_L1_TLB | ENABLE_L1_FRAGMENT_PROCESSING |
                SYSTEM_ACCESS_MODE_NOT_IN_SYS |
                EFFECTIVE_L1_TLB_SIZE(5) | EFFECTIVE_L1_QUEUE_SIZE(5) |
                ENABLE_WAIT_L2_QUERY;
        WREG32(MC_VM_L1_TLB_MCB_RD_SYS_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_SYS_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_HDP_CNTL, tmp | ENABLE_L1_STRICT_ORDERING);
        WREG32(MC_VM_L1_TLB_MCB_WR_HDP_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_RD_A_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_WR_A_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_RD_B_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_WR_B_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_GFX_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_GFX_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_PDMA_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_PDMA_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
        WREG32(MC_VM_L1_TLB_MCB_WR_SEM_CNTL, tmp | ENABLE_SEMAPHORE_MODE);
        WREG32(VM_CONTEXT0_PAGE_TABLE_START_ADDR, rdev->mc.gtt_start >> 12);
        WREG32(VM_CONTEXT0_PAGE_TABLE_END_ADDR, (rdev->mc.gtt_end - 1) >> 12);
        WREG32(VM_CONTEXT0_PAGE_TABLE_BASE_ADDR, rdev->gart.table_addr >> 12);
        WREG32(VM_CONTEXT0_CNTL, ENABLE_CONTEXT | PAGE_TABLE_DEPTH(0) |
                                RANGE_PROTECTION_FAULT_ENABLE_DEFAULT);
        WREG32(VM_CONTEXT0_PROTECTION_FAULT_DEFAULT_ADDR,
                        (u32)(rdev->dummy_page.addr >> 12));
        for (i = 1; i < 7; i++)
                WREG32(VM_CONTEXT0_CNTL + (i * 4), 0);

        r600_pcie_gart_tlb_flush(rdev);
        rdev->gart.ready = true;
        return 0;
}

void r600_pcie_gart_disable(struct radeon_device *rdev)
{
        u32 tmp;
        int i;

        /* Disable all tables */
        for (i = 0; i < 7; i++)
                WREG32(VM_CONTEXT0_CNTL + (i * 4), 0);

        /* Disable L2 cache */
        WREG32(VM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING |
                                EFFECTIVE_L2_QUEUE_SIZE(7));
        WREG32(VM_L2_CNTL3, BANK_SELECT_0(0) | BANK_SELECT_1(1));
        /* Setup L1 TLB control */
        tmp = EFFECTIVE_L1_TLB_SIZE(5) | EFFECTIVE_L1_QUEUE_SIZE(5) |
                ENABLE_WAIT_L2_QUERY;
        WREG32(MC_VM_L1_TLB_MCD_RD_A_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_WR_A_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_RD_B_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCD_WR_B_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_GFX_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_GFX_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_PDMA_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_PDMA_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_SEM_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_SEM_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_SYS_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_SYS_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_RD_HDP_CNTL, tmp);
        WREG32(MC_VM_L1_TLB_MCB_WR_HDP_CNTL, tmp);
        if (rdev->gart.table.vram.robj) {
                radeon_object_kunmap(rdev->gart.table.vram.robj);
                radeon_object_unpin(rdev->gart.table.vram.robj);
        }
}

void r600_pcie_gart_fini(struct radeon_device *rdev)
{
        r600_pcie_gart_disable(rdev);
        radeon_gart_table_vram_free(rdev);
        radeon_gart_fini(rdev);
}

int r600_mc_wait_for_idle(struct radeon_device *rdev)
{
        unsigned i;
        u32 tmp;

        for (i = 0; i < rdev->usec_timeout; i++) {
                /* read MC_STATUS */
                tmp = RREG32(R_000E50_SRBM_STATUS) & 0x3F00;
                if (!tmp)
                        return 0;
                udelay(1);
        }
        return -1;
}

static void r600_mc_resume(struct radeon_device *rdev)
{
        u32 d1vga_control, d2vga_control;
        u32 vga_render_control, vga_hdp_control;
        u32 d1crtc_control, d2crtc_control;
        u32 new_d1grph_primary, new_d1grph_secondary;
        u32 new_d2grph_primary, new_d2grph_secondary;
        u64 old_vram_start;
        u32 tmp;
        int i, j;

        /* Initialize HDP */
        for (i = 0, j = 0; i < 32; i++, j += 0x18) {
                WREG32((0x2c14 + j), 0x00000000);
                WREG32((0x2c18 + j), 0x00000000);
                WREG32((0x2c1c + j), 0x00000000);
                WREG32((0x2c20 + j), 0x00000000);
                WREG32((0x2c24 + j), 0x00000000);
        }
        WREG32(HDP_REG_COHERENCY_FLUSH_CNTL, 0);

        d1vga_control = RREG32(D1VGA_CONTROL);
        d2vga_control = RREG32(D2VGA_CONTROL);
        vga_render_control = RREG32(VGA_RENDER_CONTROL);
        vga_hdp_control = RREG32(VGA_HDP_CONTROL);
        d1crtc_control = RREG32(D1CRTC_CONTROL);
        d2crtc_control = RREG32(D2CRTC_CONTROL);
        old_vram_start = (u64)(RREG32(MC_VM_FB_LOCATION) & 0xFFFF) << 24;
        new_d1grph_primary = RREG32(D1GRPH_PRIMARY_SURFACE_ADDRESS);
        new_d1grph_secondary = RREG32(D1GRPH_SECONDARY_SURFACE_ADDRESS);
        new_d1grph_primary += rdev->mc.vram_start - old_vram_start;
        new_d1grph_secondary += rdev->mc.vram_start - old_vram_start;
        new_d2grph_primary = RREG32(D2GRPH_PRIMARY_SURFACE_ADDRESS);
        new_d2grph_secondary = RREG32(D2GRPH_SECONDARY_SURFACE_ADDRESS);
        new_d2grph_primary += rdev->mc.vram_start - old_vram_start;
        new_d2grph_secondary += rdev->mc.vram_start - old_vram_start;

        /* Stop all video */
        WREG32(D1VGA_CONTROL, 0);
        WREG32(D2VGA_CONTROL, 0);
        WREG32(VGA_RENDER_CONTROL, 0);
        WREG32(D1CRTC_UPDATE_LOCK, 1);
        WREG32(D2CRTC_UPDATE_LOCK, 1);
        WREG32(D1CRTC_CONTROL, 0);
        WREG32(D2CRTC_CONTROL, 0);
        WREG32(D1CRTC_UPDATE_LOCK, 0);
        WREG32(D2CRTC_UPDATE_LOCK, 0);

        mdelay(1);
        if (r600_mc_wait_for_idle(rdev)) {
                printk(KERN_WARNING "[drm] MC not idle !\n");
        }

        /* Lockout access through VGA aperture*/
        WREG32(VGA_HDP_CONTROL, VGA_MEMORY_DISABLE);

        /* Update configuration */
        WREG32(MC_VM_SYSTEM_APERTURE_LOW_ADDR, rdev->mc.vram_start >> 12);
        WREG32(MC_VM_SYSTEM_APERTURE_HIGH_ADDR, (rdev->mc.vram_end - 1) >> 12);
        WREG32(MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR, 0);
        tmp = (((rdev->mc.vram_end - 1) >> 24) & 0xFFFF) << 16;
        tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
        WREG32(MC_VM_FB_LOCATION, tmp);
        WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
        WREG32(HDP_NONSURFACE_INFO, (2 << 7));
        WREG32(HDP_NONSURFACE_SIZE, (rdev->mc.mc_vram_size - 1) | 0x3FF);
        if (rdev->flags & RADEON_IS_AGP) {
                WREG32(MC_VM_AGP_TOP, (rdev->mc.gtt_end - 1) >> 16);
                WREG32(MC_VM_AGP_BOT, rdev->mc.gtt_start >> 16);
                WREG32(MC_VM_AGP_BASE, rdev->mc.agp_base >> 22);
        } else {
                WREG32(MC_VM_AGP_BASE, 0);
                WREG32(MC_VM_AGP_TOP, 0x0FFFFFFF);
                WREG32(MC_VM_AGP_BOT, 0x0FFFFFFF);
        }
        WREG32(D1GRPH_PRIMARY_SURFACE_ADDRESS, new_d1grph_primary);
        WREG32(D1GRPH_SECONDARY_SURFACE_ADDRESS, new_d1grph_secondary);
        WREG32(D2GRPH_PRIMARY_SURFACE_ADDRESS, new_d2grph_primary);
        WREG32(D2GRPH_SECONDARY_SURFACE_ADDRESS, new_d2grph_secondary);
        WREG32(VGA_MEMORY_BASE_ADDRESS, rdev->mc.vram_start);

        /* Unlock host access */
        WREG32(VGA_HDP_CONTROL, vga_hdp_control);

        mdelay(1);
        if (r600_mc_wait_for_idle(rdev)) {
                printk(KERN_WARNING "[drm] MC not idle !\n");
        }

        /* Restore video state */
        WREG32(D1CRTC_UPDATE_LOCK, 1);
        WREG32(D2CRTC_UPDATE_LOCK, 1);
        WREG32(D1CRTC_CONTROL, d1crtc_control);
        WREG32(D2CRTC_CONTROL, d2crtc_control);
        WREG32(D1CRTC_UPDATE_LOCK, 0);
        WREG32(D2CRTC_UPDATE_LOCK, 0);
        WREG32(D1VGA_CONTROL, d1vga_control);
        WREG32(D2VGA_CONTROL, d2vga_control);
        WREG32(VGA_RENDER_CONTROL, vga_render_control);

        /* we need to own VRAM, so turn off the VGA renderer here
         * to stop it overwriting our objects */
        radeon_avivo_vga_render_disable(rdev);
}

int r600_mc_init(struct radeon_device *rdev)
{
        fixed20_12 a;
        u32 tmp;
        int chansize;
        int r;

        /* Get VRAM informations */
        rdev->mc.vram_width = 128;
        rdev->mc.vram_is_ddr = true;
        tmp = RREG32(RAMCFG);
        if (tmp & CHANSIZE_OVERRIDE) {
                chansize = 16;
        } else if (tmp & CHANSIZE_MASK) {
                chansize = 64;
        } else {
                chansize = 32;
        }
        if (rdev->family == CHIP_R600) {
                rdev->mc.vram_width = 8 * chansize;
        } else if (rdev->family == CHIP_RV670) {
                rdev->mc.vram_width = 4 * chansize;
        } else if ((rdev->family == CHIP_RV610) ||
                        (rdev->family == CHIP_RV620)) {
                rdev->mc.vram_width = chansize;
        } else if ((rdev->family == CHIP_RV630) ||
                        (rdev->family == CHIP_RV635)) {
                rdev->mc.vram_width = 2 * chansize;
        }
        /* Could aper size report 0 ? */
        rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0);
        rdev->mc.aper_size = drm_get_resource_len(rdev->ddev, 0);
        /* Setup GPU memory space */
        rdev->mc.mc_vram_size = RREG32(CONFIG_MEMSIZE);
        rdev->mc.real_vram_size = RREG32(CONFIG_MEMSIZE);
        if (rdev->flags & RADEON_IS_AGP) {
                r = radeon_agp_init(rdev);
                if (r)
                        return r;
                /* gtt_size is setup by radeon_agp_init */
                rdev->mc.gtt_location = rdev->mc.agp_base;
                tmp = 0xFFFFFFFFUL - rdev->mc.agp_base - rdev->mc.gtt_size;
                /* Try to put vram before or after AGP because we
                 * we want SYSTEM_APERTURE to cover both VRAM and
                 * AGP so that GPU can catch out of VRAM/AGP access
                 */
                if (rdev->mc.gtt_location > rdev->mc.mc_vram_size) {
                        /* Enought place before */
                        rdev->mc.vram_location = rdev->mc.gtt_location -
                                                        rdev->mc.mc_vram_size;
                } else if (tmp > rdev->mc.mc_vram_size) {
                        /* Enought place after */
                        rdev->mc.vram_location = rdev->mc.gtt_location +
                                                        rdev->mc.gtt_size;
                } else {
                        /* Try to setup VRAM then AGP might not
                         * not work on some card
                         */
                        rdev->mc.vram_location = 0x00000000UL;
                        rdev->mc.gtt_location = rdev->mc.mc_vram_size;
                }
        } else {
                if (rdev->family == CHIP_RS780 || rdev->family == CHIP_RS880) {
                        rdev->mc.vram_location = (RREG32(MC_VM_FB_LOCATION) &
                                                                0xFFFF) << 24;
                        rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
                        tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size;
                        if ((0xFFFFFFFFUL - tmp) >= rdev->mc.gtt_size) {
                                /* Enough place after vram */
                                rdev->mc.gtt_location = tmp;
                        } else if (rdev->mc.vram_location >= rdev->mc.gtt_size) {
                                /* Enough place before vram */
                                rdev->mc.gtt_location = 0;
                        } else {
                                /* Not enough place after or before shrink
                                 * gart size
                                 */
                                if (rdev->mc.vram_location > (0xFFFFFFFFUL - tmp)) {
                                        rdev->mc.gtt_location = 0;
                                        rdev->mc.gtt_size = rdev->mc.vram_location;
                                } else {
                                        rdev->mc.gtt_location = tmp;
                                        rdev->mc.gtt_size = 0xFFFFFFFFUL - tmp;
                                }
                        }
                        rdev->mc.gtt_location = rdev->mc.mc_vram_size;
                } else {
                        rdev->mc.vram_location = 0x00000000UL;
                        rdev->mc.gtt_location = rdev->mc.mc_vram_size;
                        rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
                }
        }
        rdev->mc.vram_start = rdev->mc.vram_location;
        rdev->mc.vram_end = rdev->mc.vram_location + rdev->mc.mc_vram_size;
        rdev->mc.gtt_start = rdev->mc.gtt_location;
        rdev->mc.gtt_end = rdev->mc.gtt_location + rdev->mc.gtt_size;
        /* FIXME: we should enforce default clock in case GPU is not in
         * default setup
         */
        a.full = rfixed_const(100);
        rdev->pm.sclk.full = rfixed_const(rdev->clock.default_sclk);
        rdev->pm.sclk.full = rfixed_div(rdev->pm.sclk, a);
        return 0;
}

/* We doesn't check that the GPU really needs a reset we simply do the
 * reset, it's up to the caller to determine if the GPU needs one. We
 * might add an helper function to check that.
 */
int r600_gpu_soft_reset(struct radeon_device *rdev)
{
        u32 grbm_busy_mask = S_008010_VC_BUSY(1) | S_008010_VGT_BUSY_NO_DMA(1) |
                                S_008010_VGT_BUSY(1) | S_008010_TA03_BUSY(1) |
                                S_008010_TC_BUSY(1) | S_008010_SX_BUSY(1) |
                                S_008010_SH_BUSY(1) | S_008010_SPI03_BUSY(1) |
                                S_008010_SMX_BUSY(1) | S_008010_SC_BUSY(1) |
                                S_008010_PA_BUSY(1) | S_008010_DB03_BUSY(1) |
                                S_008010_CR_BUSY(1) | S_008010_CB03_BUSY(1) |
                                S_008010_GUI_ACTIVE(1);
        u32 grbm2_busy_mask = S_008014_SPI0_BUSY(1) | S_008014_SPI1_BUSY(1) |
                        S_008014_SPI2_BUSY(1) | S_008014_SPI3_BUSY(1) |
                        S_008014_TA0_BUSY(1) | S_008014_TA1_BUSY(1) |
                        S_008014_TA2_BUSY(1) | S_008014_TA3_BUSY(1) |
                        S_008014_DB0_BUSY(1) | S_008014_DB1_BUSY(1) |
                        S_008014_DB2_BUSY(1) | S_008014_DB3_BUSY(1) |
                        S_008014_CB0_BUSY(1) | S_008014_CB1_BUSY(1) |
                        S_008014_CB2_BUSY(1) | S_008014_CB3_BUSY(1);
        u32 srbm_reset = 0;

        /* Disable CP parsing/prefetching */
        WREG32(R_0086D8_CP_ME_CNTL, S_0086D8_CP_ME_HALT(0xff));
        /* Check if any of the rendering block is busy and reset it */
        if ((RREG32(R_008010_GRBM_STATUS) & grbm_busy_mask) ||
            (RREG32(R_008014_GRBM_STATUS2) & grbm2_busy_mask)) {
                WREG32(R_008020_GRBM_SOFT_RESET, S_008020_SOFT_RESET_CR(1) |
                        S_008020_SOFT_RESET_DB(1) |
                        S_008020_SOFT_RESET_CB(1) |
                        S_008020_SOFT_RESET_PA(1) |
                        S_008020_SOFT_RESET_SC(1) |
                        S_008020_SOFT_RESET_SMX(1) |
                        S_008020_SOFT_RESET_SPI(1) |
                        S_008020_SOFT_RESET_SX(1) |
                        S_008020_SOFT_RESET_SH(1) |
                        S_008020_SOFT_RESET_TC(1) |
                        S_008020_SOFT_RESET_TA(1) |
                        S_008020_SOFT_RESET_VC(1) |
                        S_008020_SOFT_RESET_VGT(1));
                (void)RREG32(R_008020_GRBM_SOFT_RESET);
                udelay(50);
                WREG32(R_008020_GRBM_SOFT_RESET, 0);
                (void)RREG32(R_008020_GRBM_SOFT_RESET);
        }
        /* Reset CP (we always reset CP) */
        WREG32(R_008020_GRBM_SOFT_RESET, S_008020_SOFT_RESET_CP(1));
        (void)RREG32(R_008020_GRBM_SOFT_RESET);
        udelay(50);
        WREG32(R_008020_GRBM_SOFT_RESET, 0);
        (void)RREG32(R_008020_GRBM_SOFT_RESET);
        /* Reset others GPU block if necessary */
        if (G_000E50_RLC_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_RLC(1);
        if (G_000E50_GRBM_RQ_PENDING(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_GRBM(1);
        if (G_000E50_HI_RQ_PENDING(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_IH(1);
        if (G_000E50_VMC_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_VMC(1);
        if (G_000E50_MCB_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_MC(1);
        if (G_000E50_MCDZ_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_MC(1);
        if (G_000E50_MCDY_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_MC(1);
        if (G_000E50_MCDX_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_MC(1);
        if (G_000E50_MCDW_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_MC(1);
        if (G_000E50_RLC_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_RLC(1);
        if (G_000E50_SEM_BUSY(RREG32(R_000E50_SRBM_STATUS)))
                srbm_reset |= S_000E60_SOFT_RESET_SEM(1);
        WREG32(R_000E60_SRBM_SOFT_RESET, srbm_reset);
        (void)RREG32(R_000E60_SRBM_SOFT_RESET);
        udelay(50);
        WREG32(R_000E60_SRBM_SOFT_RESET, 0);
        (void)RREG32(R_000E60_SRBM_SOFT_RESET);
        /* Wait a little for things to settle down */
        udelay(50);
        return 0;
}

int r600_gpu_reset(struct radeon_device *rdev)
{
        return r600_gpu_soft_reset(rdev);
}

static u32 r600_get_tile_pipe_to_backend_map(u32 num_tile_pipes,
                                             u32 num_backends,
                                             u32 backend_disable_mask)
{
        u32 backend_map = 0;
        u32 enabled_backends_mask;
        u32 enabled_backends_count;
        u32 cur_pipe;
        u32 swizzle_pipe[R6XX_MAX_PIPES];
        u32 cur_backend;
        u32 i;

        if (num_tile_pipes > R6XX_MAX_PIPES)
                num_tile_pipes = R6XX_MAX_PIPES;
        if (num_tile_pipes < 1)
                num_tile_pipes = 1;
        if (num_backends > R6XX_MAX_BACKENDS)
                num_backends = R6XX_MAX_BACKENDS;
        if (num_backends < 1)
                num_backends = 1;

        enabled_backends_mask = 0;
        enabled_backends_count = 0;
        for (i = 0; i < R6XX_MAX_BACKENDS; ++i) {
                if (((backend_disable_mask >> i) & 1) == 0) {
                        enabled_backends_mask |= (1 << i);
                        ++enabled_backends_count;
                }
                if (enabled_backends_count == num_backends)
                        break;
        }

        if (enabled_backends_count == 0) {
                enabled_backends_mask = 1;
                enabled_backends_count = 1;
        }

        if (enabled_backends_count != num_backends)
                num_backends = enabled_backends_count;

        memset((uint8_t *)&swizzle_pipe[0], 0, sizeof(u32) * R6XX_MAX_PIPES);
        switch (num_tile_pipes) {
        case 1:
                swizzle_pipe[0] = 0;
                break;
        case 2:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 1;
                break;
        case 3:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 1;
                swizzle_pipe[2] = 2;
                break;
        case 4:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 1;
                swizzle_pipe[2] = 2;
                swizzle_pipe[3] = 3;
                break;
        case 5:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 1;
                swizzle_pipe[2] = 2;
                swizzle_pipe[3] = 3;
                swizzle_pipe[4] = 4;
                break;
        case 6:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 2;
                swizzle_pipe[2] = 4;
                swizzle_pipe[3] = 5;
                swizzle_pipe[4] = 1;
                swizzle_pipe[5] = 3;
                break;
        case 7:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 2;
                swizzle_pipe[2] = 4;
                swizzle_pipe[3] = 6;
                swizzle_pipe[4] = 1;
                swizzle_pipe[5] = 3;
                swizzle_pipe[6] = 5;
                break;
        case 8:
                swizzle_pipe[0] = 0;
                swizzle_pipe[1] = 2;
                swizzle_pipe[2] = 4;
                swizzle_pipe[3] = 6;
                swizzle_pipe[4] = 1;
                swizzle_pipe[5] = 3;
                swizzle_pipe[6] = 5;
                swizzle_pipe[7] = 7;
                break;
        }

        cur_backend = 0;
        for (cur_pipe = 0; cur_pipe < num_tile_pipes; ++cur_pipe) {
                while (((1 << cur_backend) & enabled_backends_mask) == 0)
                        cur_backend = (cur_backend + 1) % R6XX_MAX_BACKENDS;

                backend_map |= (u32)(((cur_backend & 3) << (swizzle_pipe[cur_pipe] * 2)));

                cur_backend = (cur_backend + 1) % R6XX_MAX_BACKENDS;
        }

        return backend_map;
}

int r600_count_pipe_bits(uint32_t val)
{
        int i, ret = 0;

        for (i = 0; i < 32; i++) {
                ret += val & 1;
                val >>= 1;
        }
        return ret;
}

void r600_gpu_init(struct radeon_device *rdev)
{
        u32 tiling_config;
        u32 ramcfg;
        u32 tmp;
        int i, j;
        u32 sq_config;
        u32 sq_gpr_resource_mgmt_1 = 0;
        u32 sq_gpr_resource_mgmt_2 = 0;
        u32 sq_thread_resource_mgmt = 0;
        u32 sq_stack_resource_mgmt_1 = 0;
        u32 sq_stack_resource_mgmt_2 = 0;

        /* FIXME: implement */
        switch (rdev->family) {
        case CHIP_R600:
                rdev->config.r600.max_pipes = 4;
                rdev->config.r600.max_tile_pipes = 8;
                rdev->config.r600.max_simds = 4;
                rdev->config.r600.max_backends = 4;
                rdev->config.r600.max_gprs = 256;
                rdev->config.r600.max_threads = 192;
                rdev->config.r600.max_stack_entries = 256;
                rdev->config.r600.max_hw_contexts = 8;
                rdev->config.r600.max_gs_threads = 16;
                rdev->config.r600.sx_max_export_size = 128;
                rdev->config.r600.sx_max_export_pos_size = 16;
                rdev->config.r600.sx_max_export_smx_size = 128;
                rdev->config.r600.sq_num_cf_insts = 2;
                break;
        case CHIP_RV630:
        case CHIP_RV635:
                rdev->config.r600.max_pipes = 2;
                rdev->config.r600.max_tile_pipes = 2;
                rdev->config.r600.max_simds = 3;
                rdev->config.r600.max_backends = 1;
                rdev->config.r600.max_gprs = 128;
                rdev->config.r600.max_threads = 192;
                rdev->config.r600.max_stack_entries = 128;
                rdev->config.r600.max_hw_contexts = 8;
                rdev->config.r600.max_gs_threads = 4;
                rdev->config.r600.sx_max_export_size = 128;
                rdev->config.r600.sx_max_export_pos_size = 16;
                rdev->config.r600.sx_max_export_smx_size = 128;
                rdev->config.r600.sq_num_cf_insts = 2;
                break;
        case CHIP_RV610:
        case CHIP_RV620:
        case CHIP_RS780:
        case CHIP_RS880:
                rdev->config.r600.max_pipes = 1;
                rdev->config.r600.max_tile_pipes = 1;
                rdev->config.r600.max_simds = 2;
                rdev->config.r600.max_backends = 1;
                rdev->config.r600.max_gprs = 128;
                rdev->config.r600.max_threads = 192;
                rdev->config.r600.max_stack_entries = 128;
                rdev->config.r600.max_hw_contexts = 4;
                rdev->config.r600.max_gs_threads = 4;
                rdev->config.r600.sx_max_export_size = 128;
                rdev->config.r600.sx_max_export_pos_size = 16;
                rdev->config.r600.sx_max_export_smx_size = 128;
                rdev->config.r600.sq_num_cf_insts = 1;
                break;
        case CHIP_RV670:
                rdev->config.r600.max_pipes = 4;
                rdev->config.r600.max_tile_pipes = 4;
                rdev->config.r600.max_simds = 4;
                rdev->config.r600.max_backends = 4;
                rdev->config.r600.max_gprs = 192;
                rdev->config.r600.max_threads = 192;
                rdev->config.r600.max_stack_entries = 256;
                rdev->config.r600.max_hw_contexts = 8;
                rdev->config.r600.max_gs_threads = 16;
                rdev->config.r600.sx_max_export_size = 128;
                rdev->config.r600.sx_max_export_pos_size = 16;
                rdev->config.r600.sx_max_export_smx_size = 128;
                rdev->config.r600.sq_num_cf_insts = 2;
                break;
        default:
                break;
        }

        /* Initialize HDP */
        for (i = 0, j = 0; i < 32; i++, j += 0x18) {
                WREG32((0x2c14 + j), 0x00000000);
                WREG32((0x2c18 + j), 0x00000000);
                WREG32((0x2c1c + j), 0x00000000);
                WREG32((0x2c20 + j), 0x00000000);
                WREG32((0x2c24 + j), 0x00000000);
        }

        WREG32(GRBM_CNTL, GRBM_READ_TIMEOUT(0xff));

        /* Setup tiling */
        tiling_config = 0;
        ramcfg = RREG32(RAMCFG);
        switch (rdev->config.r600.max_tile_pipes) {
        case 1:
                tiling_config |= PIPE_TILING(0);
                break;
        case 2:
                tiling_config |= PIPE_TILING(1);
                break;
        case 4:
                tiling_config |= PIPE_TILING(2);
                break;
        case 8:
                tiling_config |= PIPE_TILING(3);
                break;
        default:
                break;
        }
        tiling_config |= BANK_TILING((ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT);
        tiling_config |= GROUP_SIZE(0);
        tmp = (ramcfg & NOOFROWS_MASK) >> NOOFROWS_SHIFT;
        if (tmp > 3) {
                tiling_config |= ROW_TILING(3);
                tiling_config |= SAMPLE_SPLIT(3);
        } else {
                tiling_config |= ROW_TILING(tmp);
                tiling_config |= SAMPLE_SPLIT(tmp);
        }
        tiling_config |= BANK_SWAPS(1);
        tmp = r600_get_tile_pipe_to_backend_map(rdev->config.r600.max_tile_pipes,
                                                rdev->config.r600.max_backends,
                                                (0xff << rdev->config.r600.max_backends) & 0xff);
        tiling_config |= BACKEND_MAP(tmp);
        WREG32(GB_TILING_CONFIG, tiling_config);
        WREG32(DCP_TILING_CONFIG, tiling_config & 0xffff);
        WREG32(HDP_TILING_CONFIG, tiling_config & 0xffff);

        tmp = BACKEND_DISABLE((R6XX_MAX_BACKENDS_MASK << rdev->config.r600.max_backends) & R6XX_MAX_BACKENDS_MASK);
        WREG32(CC_RB_BACKEND_DISABLE, tmp);

        /* Setup pipes */
        tmp = INACTIVE_QD_PIPES((R6XX_MAX_PIPES_MASK << rdev->config.r600.max_pipes) & R6XX_MAX_PIPES_MASK);
        tmp |= INACTIVE_SIMDS((R6XX_MAX_SIMDS_MASK << rdev->config.r600.max_simds) & R6XX_MAX_SIMDS_MASK);
        WREG32(CC_GC_SHADER_PIPE_CONFIG, tmp);
        WREG32(GC_USER_SHADER_PIPE_CONFIG, tmp);

        tmp = R6XX_MAX_BACKENDS - r600_count_pipe_bits(tmp & INACTIVE_QD_PIPES_MASK);
        WREG32(VGT_OUT_DEALLOC_CNTL, (tmp * 4) & DEALLOC_DIST_MASK);
        WREG32(VGT_VERTEX_REUSE_BLOCK_CNTL, ((tmp * 4) - 2) & VTX_REUSE_DEPTH_MASK);

        /* Setup some CP states */
        WREG32(CP_QUEUE_THRESHOLDS, (ROQ_IB1_START(0x16) | ROQ_IB2_START(0x2b)));
        WREG32(CP_MEQ_THRESHOLDS, (MEQ_END(0x40) | ROQ_END(0x40)));

        WREG32(TA_CNTL_AUX, (DISABLE_CUBE_ANISO | SYNC_GRADIENT |
                             SYNC_WALKER | SYNC_ALIGNER));
        /* Setup various GPU states */
        if (rdev->family == CHIP_RV670)
                WREG32(ARB_GDEC_RD_CNTL, 0x00000021);

        tmp = RREG32(SX_DEBUG_1);
        tmp |= SMX_EVENT_RELEASE;
        if ((rdev->family > CHIP_R600))
                tmp |= ENABLE_NEW_SMX_ADDRESS;
        WREG32(SX_DEBUG_1, tmp);

        if (((rdev->family) == CHIP_R600) ||
            ((rdev->family) == CHIP_RV630) ||
            ((rdev->family) == CHIP_RV610) ||
            ((rdev->family) == CHIP_RV620) ||
            ((rdev->family) == CHIP_RS780)) {
                WREG32(DB_DEBUG, PREZ_MUST_WAIT_FOR_POSTZ_DONE);
        } else {
                WREG32(DB_DEBUG, 0);
        }
        WREG32(DB_WATERMARKS, (DEPTH_FREE(4) | DEPTH_CACHELINE_FREE(16) |
                               DEPTH_FLUSH(16) | DEPTH_PENDING_FREE(4)));

        WREG32(PA_SC_MULTI_CHIP_CNTL, 0);
        WREG32(VGT_NUM_INSTANCES, 0);

        WREG32(SPI_CONFIG_CNTL, GPR_WRITE_PRIORITY(0));
        WREG32(SPI_CONFIG_CNTL_1, VTX_DONE_DELAY(0));

        tmp = RREG32(SQ_MS_FIFO_SIZES);
        if (((rdev->family) == CHIP_RV610) ||
            ((rdev->family) == CHIP_RV620) ||
            ((rdev->family) == CHIP_RS780)) {
                tmp = (CACHE_FIFO_SIZE(0xa) |
                       FETCH_FIFO_HIWATER(0xa) |
                       DONE_FIFO_HIWATER(0xe0) |
                       ALU_UPDATE_FIFO_HIWATER(0x8));
        } else if (((rdev->family) == CHIP_R600) ||
                   ((rdev->family) == CHIP_RV630)) {
                tmp &= ~DONE_FIFO_HIWATER(0xff);
                tmp |= DONE_FIFO_HIWATER(0x4);
        }
        WREG32(SQ_MS_FIFO_SIZES, tmp);

        /* SQ_CONFIG, SQ_GPR_RESOURCE_MGMT, SQ_THREAD_RESOURCE_MGMT, SQ_STACK_RESOURCE_MGMT
         * should be adjusted as needed by the 2D/3D drivers.  This just sets default values
         */
        sq_config = RREG32(SQ_CONFIG);
        sq_config &= ~(PS_PRIO(3) |
                       VS_PRIO(3) |
                       GS_PRIO(3) |
                       ES_PRIO(3));
        sq_config |= (DX9_CONSTS |
                      VC_ENABLE |
                      PS_PRIO(0) |
                      VS_PRIO(1) |
                      GS_PRIO(2) |
                      ES_PRIO(3));

        if ((rdev->family) == CHIP_R600) {
                sq_gpr_resource_mgmt_1 = (NUM_PS_GPRS(124) |
                                          NUM_VS_GPRS(124) |
                                          NUM_CLAUSE_TEMP_GPRS(4));
                sq_gpr_resource_mgmt_2 = (NUM_GS_GPRS(0) |
                                          NUM_ES_GPRS(0));
                sq_thread_resource_mgmt = (NUM_PS_THREADS(136) |
                                           NUM_VS_THREADS(48) |
                                           NUM_GS_THREADS(4) |
                                           NUM_ES_THREADS(4));
                sq_stack_resource_mgmt_1 = (NUM_PS_STACK_ENTRIES(128) |
                                            NUM_VS_STACK_ENTRIES(128));
                sq_stack_resource_mgmt_2 = (NUM_GS_STACK_ENTRIES(0) |
                                            NUM_ES_STACK_ENTRIES(0));
        } else if (((rdev->family) == CHIP_RV610) ||
                   ((rdev->family) == CHIP_RV620) ||
                   ((rdev->family) == CHIP_RS780)) {
                /* no vertex cache */
                sq_config &= ~VC_ENABLE;

                sq_gpr_resource_mgmt_1 = (NUM_PS_GPRS(44) |
                                          NUM_VS_GPRS(44) |
                                          NUM_CLAUSE_TEMP_GPRS(2));
                sq_gpr_resource_mgmt_2 = (NUM_GS_GPRS(17) |
                                          NUM_ES_GPRS(17));
                sq_thread_resource_mgmt = (NUM_PS_THREADS(79) |
                                           NUM_VS_THREADS(78) |
                                           NUM_GS_THREADS(4) |
                                           NUM_ES_THREADS(31));
                sq_stack_resource_mgmt_1 = (NUM_PS_STACK_ENTRIES(40) |
                                            NUM_VS_STACK_ENTRIES(40));
                sq_stack_resource_mgmt_2 = (NUM_GS_STACK_ENTRIES(32) |
                                            NUM_ES_STACK_ENTRIES(16));
        } else if (((rdev->family) == CHIP_RV630) ||
                   ((rdev->family) == CHIP_RV635)) {
                sq_gpr_resource_mgmt_1 = (NUM_PS_GPRS(44) |
                                          NUM_VS_GPRS(44) |
                                          NUM_CLAUSE_TEMP_GPRS(2));
                sq_gpr_resource_mgmt_2 = (NUM_GS_GPRS(18) |
                                          NUM_ES_GPRS(18));
                sq_thread_resource_mgmt = (NUM_PS_THREADS(79) |
                                           NUM_VS_THREADS(78) |
                                           NUM_GS_THREADS(4) |
                                           NUM_ES_THREADS(31));
                sq_stack_resource_mgmt_1 = (NUM_PS_STACK_ENTRIES(40) |
                                            NUM_VS_STACK_ENTRIES(40));
                sq_stack_resource_mgmt_2 = (NUM_GS_STACK_ENTRIES(32) |
                                            NUM_ES_STACK_ENTRIES(16));
        } else if ((rdev->family) == CHIP_RV670) {
                sq_gpr_resource_mgmt_1 = (NUM_PS_GPRS(44) |
                                          NUM_VS_GPRS(44) |
                                          NUM_CLAUSE_TEMP_GPRS(2));
                sq_gpr_resource_mgmt_2 = (NUM_GS_GPRS(17) |
                                          NUM_ES_GPRS(17));
                sq_thread_resource_mgmt = (NUM_PS_THREADS(79) |
                                           NUM_VS_THREADS(78) |
                                           NUM_GS_THREADS(4) |
                                           NUM_ES_THREADS(31));
                sq_stack_resource_mgmt_1 = (NUM_PS_STACK_ENTRIES(64) |
                                            NUM_VS_STACK_ENTRIES(64));
                sq_stack_resource_mgmt_2 = (NUM_GS_STACK_ENTRIES(64) |
                                            NUM_ES_STACK_ENTRIES(64));
        }

        WREG32(SQ_CONFIG, sq_config);
        WREG32(SQ_GPR_RESOURCE_MGMT_1,  sq_gpr_resource_mgmt_1);
        WREG32(SQ_GPR_RESOURCE_MGMT_2,  sq_gpr_resource_mgmt_2);
        WREG32(SQ_THREAD_RESOURCE_MGMT, sq_thread_resource_mgmt);
        WREG32(SQ_STACK_RESOURCE_MGMT_1, sq_stack_resource_mgmt_1);
        WREG32(SQ_STACK_RESOURCE_MGMT_2, sq_stack_resource_mgmt_2);

        if (((rdev->family) == CHIP_RV610) ||
            ((rdev->family) == CHIP_RV620) ||
            ((rdev->family) == CHIP_RS780)) {
                WREG32(VGT_CACHE_INVALIDATION, CACHE_INVALIDATION(TC_ONLY));
        } else {
                WREG32(VGT_CACHE_INVALIDATION, CACHE_INVALIDATION(VC_AND_TC));
        }

        /* More default values. 2D/3D driver should adjust as needed */
        WREG32(PA_SC_AA_SAMPLE_LOCS_2S, (S0_X(0xc) | S0_Y(0x4) |
                                         S1_X(0x4) | S1_Y(0xc)));
        WREG32(PA_SC_AA_SAMPLE_LOCS_4S, (S0_X(0xe) | S0_Y(0xe) |
                                         S1_X(0x2) | S1_Y(0x2) |
                                         S2_X(0xa) | S2_Y(0x6) |
                                         S3_X(0x6) | S3_Y(0xa)));
        WREG32(PA_SC_AA_SAMPLE_LOCS_8S_WD0, (S0_X(0xe) | S0_Y(0xb) |
                                             S1_X(0x4) | S1_Y(0xc) |
                                             S2_X(0x1) | S2_Y(0x6) |
                                             S3_X(0xa) | S3_Y(0xe)));
        WREG32(PA_SC_AA_SAMPLE_LOCS_8S_WD1, (S4_X(0x6) | S4_Y(0x1) |
                                             S5_X(0x0) | S5_Y(0x0) |
                                             S6_X(0xb) | S6_Y(0x4) |
                                             S7_X(0x7) | S7_Y(0x8)));

        WREG32(VGT_STRMOUT_EN, 0);
        tmp = rdev->config.r600.max_pipes * 16;
        switch (rdev->family) {
        case CHIP_RV610:
        case CHIP_RS780:
        case CHIP_RV620:
                tmp += 32;
                break;
        case CHIP_RV670:
                tmp += 128;
                break;
        default:
                break;
        }
        if (tmp > 256) {
                tmp = 256;
        }
        WREG32(VGT_ES_PER_GS, 128);
        WREG32(VGT_GS_PER_ES, tmp);
        WREG32(VGT_GS_PER_VS, 2);
        WREG32(VGT_GS_VERTEX_REUSE, 16);

        /* more default values. 2D/3D driver should adjust as needed */
        WREG32(PA_SC_LINE_STIPPLE_STATE, 0);
        WREG32(VGT_STRMOUT_EN, 0);
        WREG32(SX_MISC, 0);
        WREG32(PA_SC_MODE_CNTL, 0);
        WREG32(PA_SC_AA_CONFIG, 0);
        WREG32(PA_SC_LINE_STIPPLE, 0);
        WREG32(SPI_INPUT_Z, 0);
        WREG32(SPI_PS_IN_CONTROL_0, NUM_INTERP(2));
        WREG32(CB_COLOR7_FRAG, 0);

        /* Clear render buffer base addresses */
        WREG32(CB_COLOR0_BASE, 0);
        WREG32(CB_COLOR1_BASE, 0);
        WREG32(CB_COLOR2_BASE, 0);
        WREG32(CB_COLOR3_BASE, 0);
        WREG32(CB_COLOR4_BASE, 0);
        WREG32(CB_COLOR5_BASE, 0);
        WREG32(CB_COLOR6_BASE, 0);
        WREG32(CB_COLOR7_BASE, 0);
        WREG32(CB_COLOR7_FRAG, 0);

        switch (rdev->family) {
        case CHIP_RV610:
        case CHIP_RS780:
        case CHIP_RV620:
                tmp = TC_L2_SIZE(8);
                break;
        case CHIP_RV630:
        case CHIP_RV635:
                tmp = TC_L2_SIZE(4);
                break;
        case CHIP_R600:
                tmp = TC_L2_SIZE(0) | L2_DISABLE_LATE_HIT;
                break;
        default:
                tmp = TC_L2_SIZE(0);
                break;
        }
        WREG32(TC_CNTL, tmp);

        tmp = RREG32(HDP_HOST_PATH_CNTL);
        WREG32(HDP_HOST_PATH_CNTL, tmp);

        tmp = RREG32(ARB_POP);
        tmp |= ENABLE_TC128;
        WREG32(ARB_POP, tmp);

        WREG32(PA_SC_MULTI_CHIP_CNTL, 0);
        WREG32(PA_CL_ENHANCE, (CLIP_VTX_REORDER_ENA |
                               NUM_CLIP_SEQ(3)));
        WREG32(PA_SC_ENHANCE, FORCE_EOV_MAX_CLK_CNT(4095));
}


/*
 * Indirect registers accessor
 */
u32 r600_pciep_rreg(struct radeon_device *rdev, u32 reg)
{
        u32 r;

        WREG32(PCIE_PORT_INDEX, ((reg) & 0xff));
        (void)RREG32(PCIE_PORT_INDEX);
        r = RREG32(PCIE_PORT_DATA);
        return r;
}

void r600_pciep_wreg(struct radeon_device *rdev, u32 reg, u32 v)
{
        WREG32(PCIE_PORT_INDEX, ((reg) & 0xff));
        (void)RREG32(PCIE_PORT_INDEX);
        WREG32(PCIE_PORT_DATA, (v));
        (void)RREG32(PCIE_PORT_DATA);
}


/*
 * CP & Ring
 */
void r600_cp_stop(struct radeon_device *rdev)
{
        WREG32(R_0086D8_CP_ME_CNTL, S_0086D8_CP_ME_HALT(1));
}

int r600_cp_init_microcode(struct radeon_device *rdev)
{
        struct platform_device *pdev;
        const char *chip_name;
        size_t pfp_req_size, me_req_size;
        char fw_name[30];
        int err;

        DRM_DEBUG("\n");

        pdev = platform_device_register_simple("radeon_cp", 0, NULL, 0);
        err = IS_ERR(pdev);
        if (err) {
                printk(KERN_ERR "radeon_cp: Failed to register firmware\n");
                return -EINVAL;
        }

        switch (rdev->family) {
        case CHIP_R600: chip_name = "R600"; break;
        case CHIP_RV610: chip_name = "RV610"; break;
        case CHIP_RV630: chip_name = "RV630"; break;
        case CHIP_RV620: chip_name = "RV620"; break;
        case CHIP_RV635: chip_name = "RV635"; break;
        case CHIP_RV670: chip_name = "RV670"; break;
        case CHIP_RS780:
        case CHIP_RS880: chip_name = "RS780"; break;
        case CHIP_RV770: chip_name = "RV770"; break;
        case CHIP_RV730:
        case CHIP_RV740: chip_name = "RV730"; break;
        case CHIP_RV710: chip_name = "RV710"; break;
        default: BUG();
        }

        if (rdev->family >= CHIP_RV770) {
                pfp_req_size = R700_PFP_UCODE_SIZE * 4;
                me_req_size = R700_PM4_UCODE_SIZE * 4;
        } else {
                pfp_req_size = PFP_UCODE_SIZE * 4;
                me_req_size = PM4_UCODE_SIZE * 12;
        }

        DRM_INFO("Loading %s CP Microcode\n", chip_name);

        snprintf(fw_name, sizeof(fw_name), "radeon/%s_pfp.bin", chip_name);
        err = request_firmware(&rdev->pfp_fw, fw_name, &pdev->dev);
        if (err)
                goto out;
        if (rdev->pfp_fw->size != pfp_req_size) {
                printk(KERN_ERR
                       "r600_cp: Bogus length %zu in firmware \"%s\"\n",
                       rdev->pfp_fw->size, fw_name);
                err = -EINVAL;
                goto out;
        }

        snprintf(fw_name, sizeof(fw_name), "radeon/%s_me.bin", chip_name);
        err = request_firmware(&rdev->me_fw, fw_name, &pdev->dev);
        if (err)
                goto out;
        if (rdev->me_fw->size != me_req_size) {
                printk(KERN_ERR
                       "r600_cp: Bogus length %zu in firmware \"%s\"\n",
                       rdev->me_fw->size, fw_name);
                err = -EINVAL;
        }
out:
        platform_device_unregister(pdev);

        if (err) {
                if (err != -EINVAL)
                        printk(KERN_ERR
                               "r600_cp: Failed to load firmware \"%s\"\n",
                               fw_name);
                release_firmware(rdev->pfp_fw);
                rdev->pfp_fw = NULL;
                release_firmware(rdev->me_fw);
                rdev->me_fw = NULL;
        }
        return err;
}

static int r600_cp_load_microcode(struct radeon_device *rdev)
{
        const __be32 *fw_data;
        int i;

        if (!rdev->me_fw || !rdev->pfp_fw)
                return -EINVAL;

        r600_cp_stop(rdev);

        WREG32(CP_RB_CNTL, RB_NO_UPDATE | RB_BLKSZ(15) | RB_BUFSZ(3));

        /* Reset cp */
        WREG32(GRBM_SOFT_RESET, SOFT_RESET_CP);
        RREG32(GRBM_SOFT_RESET);
        mdelay(15);
        WREG32(GRBM_SOFT_RESET, 0);

        WREG32(CP_ME_RAM_WADDR, 0);

        fw_data = (const __be32 *)rdev->me_fw->data;
        WREG32(CP_ME_RAM_WADDR, 0);
        for (i = 0; i < PM4_UCODE_SIZE * 3; i++)
                WREG32(CP_ME_RAM_DATA,
                       be32_to_cpup(fw_data++));

        fw_data = (const __be32 *)rdev->pfp_fw->data;
        WREG32(CP_PFP_UCODE_ADDR, 0);
        for (i = 0; i < PFP_UCODE_SIZE; i++)
                WREG32(CP_PFP_UCODE_DATA,
                       be32_to_cpup(fw_data++));

        WREG32(CP_PFP_UCODE_ADDR, 0);
        WREG32(CP_ME_RAM_WADDR, 0);
        WREG32(CP_ME_RAM_RADDR, 0);
        return 0;
}

int r600_cp_start(struct radeon_device *rdev)
{
        int r;
        uint32_t cp_me;

        r = radeon_ring_lock(rdev, 7);
        if (r) {
                DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r);
                return r;
        }
        radeon_ring_write(rdev, PACKET3(PACKET3_ME_INITIALIZE, 5));
        radeon_ring_write(rdev, 0x1);
        if (rdev->family < CHIP_RV770) {
                radeon_ring_write(rdev, 0x3);
                radeon_ring_write(rdev, rdev->config.r600.max_hw_contexts - 1);
        } else {
                radeon_ring_write(rdev, 0x0);
                radeon_ring_write(rdev, rdev->config.rv770.max_hw_contexts - 1);
        }
        radeon_ring_write(rdev, PACKET3_ME_INITIALIZE_DEVICE_ID(1));
        radeon_ring_write(rdev, 0);
        radeon_ring_write(rdev, 0);
        radeon_ring_unlock_commit(rdev);

        cp_me = 0xff;
        WREG32(R_0086D8_CP_ME_CNTL, cp_me);
        return 0;
}

int r600_cp_resume(struct radeon_device *rdev)
{
        u32 tmp;
        u32 rb_bufsz;
        int r;

        /* Reset cp */
        WREG32(GRBM_SOFT_RESET, SOFT_RESET_CP);
        RREG32(GRBM_SOFT_RESET);
        mdelay(15);
        WREG32(GRBM_SOFT_RESET, 0);

        /* Set ring buffer size */
        rb_bufsz = drm_order(rdev->cp.ring_size / 8);
#ifdef __BIG_ENDIAN
        WREG32(CP_RB_CNTL, BUF_SWAP_32BIT | RB_NO_UPDATE |
                (drm_order(4096/8) << 8) | rb_bufsz);
#else
        WREG32(CP_RB_CNTL, RB_NO_UPDATE | (drm_order(4096/8) << 8) | rb_bufsz);
#endif
        WREG32(CP_SEM_WAIT_TIMER, 0x4);

        /* Set the write pointer delay */
        WREG32(CP_RB_WPTR_DELAY, 0);

        /* Initialize the ring buffer's read and write pointers */
        tmp = RREG32(CP_RB_CNTL);
        WREG32(CP_RB_CNTL, tmp | RB_RPTR_WR_ENA);
        WREG32(CP_RB_RPTR_WR, 0);
        WREG32(CP_RB_WPTR, 0);
        WREG32(CP_RB_RPTR_ADDR, rdev->cp.gpu_addr & 0xFFFFFFFF);
        WREG32(CP_RB_RPTR_ADDR_HI, upper_32_bits(rdev->cp.gpu_addr));
        mdelay(1);
        WREG32(CP_RB_CNTL, tmp);

        WREG32(CP_RB_BASE, rdev->cp.gpu_addr >> 8);
        WREG32(CP_DEBUG, (1 << 27) | (1 << 28));

        rdev->cp.rptr = RREG32(CP_RB_RPTR);
        rdev->cp.wptr = RREG32(CP_RB_WPTR);

        r600_cp_start(rdev);
        rdev->cp.ready = true;
        r = radeon_ring_test(rdev);
        if (r) {
                rdev->cp.ready = false;
                return r;
        }
        return 0;
}

void r600_cp_commit(struct radeon_device *rdev)
{
        WREG32(CP_RB_WPTR, rdev->cp.wptr);
        (void)RREG32(CP_RB_WPTR);
}

void r600_ring_init(struct radeon_device *rdev, unsigned ring_size)
{
        u32 rb_bufsz;

        /* Align ring size */
        rb_bufsz = drm_order(ring_size / 8);
        ring_size = (1 << (rb_bufsz + 1)) * 4;
        rdev->cp.ring_size = ring_size;
        rdev->cp.align_mask = 16 - 1;
}


/*
 * GPU scratch registers helpers function.
 */
void r600_scratch_init(struct radeon_device *rdev)
{
        int i;

        rdev->scratch.num_reg = 7;
        for (i = 0; i < rdev->scratch.num_reg; i++) {
                rdev->scratch.free[i] = true;
                rdev->scratch.reg[i] = SCRATCH_REG0 + (i * 4);
        }
}

int r600_ring_test(struct radeon_device *rdev)
{
        uint32_t scratch;
        uint32_t tmp = 0;
        unsigned i;
        int r;

        r = radeon_scratch_get(rdev, &scratch);
        if (r) {
                DRM_ERROR("radeon: cp failed to get scratch reg (%d).\n", r);
                return r;
        }
        WREG32(scratch, 0xCAFEDEAD);
        r = radeon_ring_lock(rdev, 3);
        if (r) {
                DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r);
                radeon_scratch_free(rdev, scratch);
                return r;
        }
        radeon_ring_write(rdev, PACKET3(PACKET3_SET_CONFIG_REG, 1));
        radeon_ring_write(rdev, ((scratch - PACKET3_SET_CONFIG_REG_OFFSET) >> 2));
        radeon_ring_write(rdev, 0xDEADBEEF);
        radeon_ring_unlock_commit(rdev);
        for (i = 0; i < rdev->usec_timeout; i++) {
                tmp = RREG32(scratch);
                if (tmp == 0xDEADBEEF)
                        break;
                DRM_UDELAY(1);
        }
        if (i < rdev->usec_timeout) {
                DRM_INFO("ring test succeeded in %d usecs\n", i);
        } else {
                DRM_ERROR("radeon: ring test failed (scratch(0x%04X)=0x%08X)\n",
                          scratch, tmp);
                r = -EINVAL;
        }
        radeon_scratch_free(rdev, scratch);
        return r;
}

/*
 * Writeback
 */
int r600_wb_init(struct radeon_device *rdev)
{
        int r;

        if (rdev->wb.wb_obj == NULL) {
                r = radeon_object_create(rdev, NULL, 4096,
                                         true,
                                         RADEON_GEM_DOMAIN_GTT,
                                         false, &rdev->wb.wb_obj);
                if (r) {
                        DRM_ERROR("radeon: failed to create WB buffer (%d).\n", r);
                        return r;
                }
                r = radeon_object_pin(rdev->wb.wb_obj,
                                      RADEON_GEM_DOMAIN_GTT,
                                      &rdev->wb.gpu_addr);
                if (r) {
                        DRM_ERROR("radeon: failed to pin WB buffer (%d).\n", r);
                        return r;
                }
                r = radeon_object_kmap(rdev->wb.wb_obj, (void **)&rdev->wb.wb);
                if (r) {
                        DRM_ERROR("radeon: failed to map WB buffer (%d).\n", r);
                        return r;
                }
        }
        WREG32(SCRATCH_ADDR, (rdev->wb.gpu_addr >> 8) & 0xFFFFFFFF);
        WREG32(CP_RB_RPTR_ADDR, (rdev->wb.gpu_addr + 1024) & 0xFFFFFFFC);
        WREG32(CP_RB_RPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + 1024) & 0xFF);
        WREG32(SCRATCH_UMSK, 0xff);
        return 0;
}

void r600_wb_fini(struct radeon_device *rdev)
{
        if (rdev->wb.wb_obj) {
                radeon_object_kunmap(rdev->wb.wb_obj);
                radeon_object_unpin(rdev->wb.wb_obj);
                radeon_object_unref(&rdev->wb.wb_obj);
                rdev->wb.wb = NULL;
                rdev->wb.wb_obj = NULL;
        }
}


/*
 * CS
 */
void r600_fence_ring_emit(struct radeon_device *rdev,
                          struct radeon_fence *fence)
{
        /* Emit fence sequence & fire IRQ */
        radeon_ring_write(rdev, PACKET3(PACKET3_SET_CONFIG_REG, 1));
        radeon_ring_write(rdev, ((rdev->fence_drv.scratch_reg - PACKET3_SET_CONFIG_REG_OFFSET) >> 2));
        radeon_ring_write(rdev, fence->seq);
}

int r600_copy_dma(struct radeon_device *rdev,
                  uint64_t src_offset,
                  uint64_t dst_offset,
                  unsigned num_pages,
                  struct radeon_fence *fence)
{
        /* FIXME: implement */
        return 0;
}

int r600_copy_blit(struct radeon_device *rdev,
                   uint64_t src_offset, uint64_t dst_offset,
                   unsigned num_pages, struct radeon_fence *fence)
{
        r600_blit_prepare_copy(rdev, num_pages * 4096);
        r600_kms_blit_copy(rdev, src_offset, dst_offset, num_pages * 4096);
        r600_blit_done_copy(rdev, fence);
        return 0;
}

int r600_irq_process(struct radeon_device *rdev)
{
        /* FIXME: implement */
        return 0;
}

int r600_irq_set(struct radeon_device *rdev)
{
        /* FIXME: implement */
        return 0;
}

int r600_set_surface_reg(struct radeon_device *rdev, int reg,
                         uint32_t tiling_flags, uint32_t pitch,
                         uint32_t offset, uint32_t obj_size)
{
        /* FIXME: implement */
        return 0;
}

void r600_clear_surface_reg(struct radeon_device *rdev, int reg)
{
        /* FIXME: implement */
}


bool r600_card_posted(struct radeon_device *rdev)
{
        uint32_t reg;

        /* first check CRTCs */
        reg = RREG32(D1CRTC_CONTROL) |
                RREG32(D2CRTC_CONTROL);
        if (reg & CRTC_EN)
                return true;

        /* then check MEM_SIZE, in case the crtcs are off */
        if (RREG32(CONFIG_MEMSIZE))
                return true;

        return false;
}

int r600_startup(struct radeon_device *rdev)
{
        int r;

        r600_gpu_reset(rdev);
        r600_mc_resume(rdev);
        r = r600_pcie_gart_enable(rdev);
        if (r)
                return r;
        r600_gpu_init(rdev);

        r = radeon_object_pin(rdev->r600_blit.shader_obj, RADEON_GEM_DOMAIN_VRAM,
                              &rdev->r600_blit.shader_gpu_addr);
        if (r) {
                DRM_ERROR("failed to pin blit object %d\n", r);
                return r;
        }

        r = radeon_ring_init(rdev, rdev->cp.ring_size);
        if (r)
                return r;
        r = r600_cp_load_microcode(rdev);
        if (r)
                return r;
        r = r600_cp_resume(rdev);
        if (r)
                return r;
        r = r600_wb_init(rdev);
        if (r)
                return r;
        return 0;
}

int r600_resume(struct radeon_device *rdev)
{
        int r;

        if (radeon_gpu_reset(rdev)) {
                /* FIXME: what do we want to do here ? */
        }
        /* post card */
        if (rdev->is_atom_bios) {
                atom_asic_init(rdev->mode_info.atom_context);
        } else {
                radeon_combios_asic_init(rdev->ddev);
        }
        /* Initialize clocks */
        r = radeon_clocks_init(rdev);
        if (r) {
                return r;
        }

        r = r600_startup(rdev);
        if (r) {
                DRM_ERROR("r600 startup failed on resume\n");
                return r;
        }

        r = radeon_ib_test(rdev);
        if (r) {
                DRM_ERROR("radeon: failled testing IB (%d).\n", r);
                return r;
        }
        return r;
}


int r600_suspend(struct radeon_device *rdev)
{
        /* FIXME: we should wait for ring to be empty */
        r600_cp_stop(rdev);
        rdev->cp.ready = false;

        r600_pcie_gart_disable(rdev);
        /* unpin shaders bo */
        radeon_object_unpin(rdev->r600_blit.shader_obj);
        return 0;
}

/* Plan is to move initialization in that function and use
 * helper function so that radeon_device_init pretty much
 * do nothing more than calling asic specific function. This
 * should also allow to remove a bunch of callback function
 * like vram_info.
 */
int r600_init(struct radeon_device *rdev)
{
        int r;

        rdev->new_init_path = true;
        r = radeon_dummy_page_init(rdev);
        if (r)
                return r;
        if (r600_debugfs_mc_info_init(rdev)) {
                DRM_ERROR("Failed to register debugfs file for mc !\n");
        }
        /* This don't do much */
        r = radeon_gem_init(rdev);
        if (r)
                return r;
        /* Read BIOS */
        if (!radeon_get_bios(rdev)) {
                if (ASIC_IS_AVIVO(rdev))
                        return -EINVAL;
        }
        /* Must be an ATOMBIOS */
        if (!rdev->is_atom_bios)
                return -EINVAL;
        r = radeon_atombios_init(rdev);
        if (r)
                return r;
        /* Post card if necessary */
        if (!r600_card_posted(rdev) && rdev->bios) {
                DRM_INFO("GPU not posted. posting now...\n");
                atom_asic_init(rdev->mode_info.atom_context);
        }
        /* Initialize scratch registers */
        r600_scratch_init(rdev);
        /* Initialize surface registers */
        radeon_surface_init(rdev);
        radeon_get_clock_info(rdev->ddev);
        r = radeon_clocks_init(rdev);
        if (r)
                return r;
        /* Fence driver */
        r = radeon_fence_driver_init(rdev);
        if (r)
                return r;
        r = r600_mc_init(rdev);
        if (r) {
                if (rdev->flags & RADEON_IS_AGP) {
                        /* Retry with disabling AGP */
                        r600_fini(rdev);
                        rdev->flags &= ~RADEON_IS_AGP;
                        return r600_init(rdev);
                }
                return r;
        }
        /* Memory manager */
        r = radeon_object_init(rdev);
        if (r)
                return r;
        rdev->cp.ring_obj = NULL;
        r600_ring_init(rdev, 1024 * 1024);

        if (!rdev->me_fw || !rdev->pfp_fw) {
                r = r600_cp_init_microcode(rdev);
                if (r) {
                        DRM_ERROR("Failed to load firmware!\n");
                        return r;
                }
        }

        r = r600_pcie_gart_init(rdev);
        if (r)
                return r;

        rdev->accel_working = true;
        r = r600_blit_init(rdev);
        if (r) {
                DRM_ERROR("radeon: failled blitter (%d).\n", r);
                return r;
        }

        r = r600_startup(rdev);
        if (r) {
                if (rdev->flags & RADEON_IS_AGP) {
                        /* Retry with disabling AGP */
                        r600_fini(rdev);
                        rdev->flags &= ~RADEON_IS_AGP;
                        return r600_init(rdev);
                }
                rdev->accel_working = false;
        }
        if (rdev->accel_working) {
                r = radeon_ib_pool_init(rdev);
                if (r) {
                        DRM_ERROR("radeon: failled initializing IB pool (%d).\n", r);
                        rdev->accel_working = false;
                }
                r = radeon_ib_test(rdev);
                if (r) {
                        DRM_ERROR("radeon: failled testing IB (%d).\n", r);
                        rdev->accel_working = false;
                }
        }
        return 0;
}

void r600_fini(struct radeon_device *rdev)
{
        /* Suspend operations */
        r600_suspend(rdev);

        r600_blit_fini(rdev);
        radeon_ring_fini(rdev);
        r600_pcie_gart_fini(rdev);
        radeon_gem_fini(rdev);
        radeon_fence_driver_fini(rdev);
        radeon_clocks_fini(rdev);
#if __OS_HAS_AGP
        if (rdev->flags & RADEON_IS_AGP)
                radeon_agp_fini(rdev);
#endif
        radeon_object_fini(rdev);
        if (rdev->is_atom_bios)
                radeon_atombios_fini(rdev);
        else
                radeon_combios_fini(rdev);
        kfree(rdev->bios);
        rdev->bios = NULL;
        radeon_dummy_page_fini(rdev);
}


/*
 * CS stuff
 */
void r600_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
{
        /* FIXME: implement */
        radeon_ring_write(rdev, PACKET3(PACKET3_INDIRECT_BUFFER, 2));
        radeon_ring_write(rdev, ib->gpu_addr & 0xFFFFFFFC);
        radeon_ring_write(rdev, upper_32_bits(ib->gpu_addr) & 0xFF);
        radeon_ring_write(rdev, ib->length_dw);
}

int r600_ib_test(struct radeon_device *rdev)
{
        struct radeon_ib *ib;
        uint32_t scratch;
        uint32_t tmp = 0;
        unsigned i;
        int r;

        r = radeon_scratch_get(rdev, &scratch);
        if (r) {
                DRM_ERROR("radeon: failed to get scratch reg (%d).\n", r);
                return r;
        }
        WREG32(scratch, 0xCAFEDEAD);
        r = radeon_ib_get(rdev, &ib);
        if (r) {
                DRM_ERROR("radeon: failed to get ib (%d).\n", r);
                return r;
        }
        ib->ptr[0] = PACKET3(PACKET3_SET_CONFIG_REG, 1);
        ib->ptr[1] = ((scratch - PACKET3_SET_CONFIG_REG_OFFSET) >> 2);
        ib->ptr[2] = 0xDEADBEEF;
        ib->ptr[3] = PACKET2(0);
        ib->ptr[4] = PACKET2(0);
        ib->ptr[5] = PACKET2(0);
        ib->ptr[6] = PACKET2(0);
        ib->ptr[7] = PACKET2(0);
        ib->ptr[8] = PACKET2(0);
        ib->ptr[9] = PACKET2(0);
        ib->ptr[10] = PACKET2(0);
        ib->ptr[11] = PACKET2(0);
        ib->ptr[12] = PACKET2(0);
        ib->ptr[13] = PACKET2(0);
        ib->ptr[14] = PACKET2(0);
        ib->ptr[15] = PACKET2(0);
        ib->length_dw = 16;
        r = radeon_ib_schedule(rdev, ib);
        if (r) {
                radeon_scratch_free(rdev, scratch);
                radeon_ib_free(rdev, &ib);
                DRM_ERROR("radeon: failed to schedule ib (%d).\n", r);
                return r;
        }
        r = radeon_fence_wait(ib->fence, false);
        if (r) {
                DRM_ERROR("radeon: fence wait failed (%d).\n", r);
                return r;
        }
        for (i = 0; i < rdev->usec_timeout; i++) {
                tmp = RREG32(scratch);
                if (tmp == 0xDEADBEEF)
                        break;
                DRM_UDELAY(1);
        }
        if (i < rdev->usec_timeout) {
                DRM_INFO("ib test succeeded in %u usecs\n", i);
        } else {
                DRM_ERROR("radeon: ib test failed (sracth(0x%04X)=0x%08X)\n",
                          scratch, tmp);
                r = -EINVAL;
        }
        radeon_scratch_free(rdev, scratch);
        radeon_ib_free(rdev, &ib);
        return r;
}




/*
 * Debugfs info
 */
#if defined(CONFIG_DEBUG_FS)

static int r600_debugfs_cp_ring_info(struct seq_file *m, void *data)
{
        struct drm_info_node *node = (struct drm_info_node *) m->private;
        struct drm_device *dev = node->minor->dev;
        struct radeon_device *rdev = dev->dev_private;
        uint32_t rdp, wdp;
        unsigned count, i, j;

        radeon_ring_free_size(rdev);
        rdp = RREG32(CP_RB_RPTR);
        wdp = RREG32(CP_RB_WPTR);
        count = (rdp + rdev->cp.ring_size - wdp) & rdev->cp.ptr_mask;
        seq_printf(m, "CP_STAT 0x%08x\n", RREG32(CP_STAT));
        seq_printf(m, "CP_RB_WPTR 0x%08x\n", wdp);
        seq_printf(m, "CP_RB_RPTR 0x%08x\n", rdp);
        seq_printf(m, "%u free dwords in ring\n", rdev->cp.ring_free_dw);
        seq_printf(m, "%u dwords in ring\n", count);
        for (j = 0; j <= count; j++) {
                i = (rdp + j) & rdev->cp.ptr_mask;
                seq_printf(m, "r[%04d]=0x%08x\n", i, rdev->cp.ring[i]);
        }
        return 0;
}

static int r600_debugfs_mc_info(struct seq_file *m, void *data)
{
        struct drm_info_node *node = (struct drm_info_node *) m->private;
        struct drm_device *dev = node->minor->dev;
        struct radeon_device *rdev = dev->dev_private;

        DREG32_SYS(m, rdev, R_000E50_SRBM_STATUS);
        DREG32_SYS(m, rdev, VM_L2_STATUS);
        return 0;
}

static struct drm_info_list r600_mc_info_list[] = {
        {"r600_mc_info", r600_debugfs_mc_info, 0, NULL},
        {"r600_ring_info", r600_debugfs_cp_ring_info, 0, NULL},
};
#endif

int r600_debugfs_mc_info_init(struct radeon_device *rdev)
{
#if defined(CONFIG_DEBUG_FS)
        return radeon_debugfs_add_files(rdev, r600_mc_info_list, ARRAY_SIZE(r600_mc_info_list));
#else
        return 0;
#endif
}