/*
 * Copyright 2016 Advanced Micro Devices, Inc.
 *
 * 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.
 *
 */

#include <linux/firmware.h>
#include <drm/drmP.h>
#include "amdgpu.h"
#include "amdgpu_ucode.h"
#include "amdgpu_trace.h"

#include "sdma0/sdma0_4_2_offset.h"
#include "sdma0/sdma0_4_2_sh_mask.h"
#include "sdma1/sdma1_4_2_offset.h"
#include "sdma1/sdma1_4_2_sh_mask.h"
#include "hdp/hdp_4_0_offset.h"
#include "sdma0/sdma0_4_1_default.h"

#include "soc15_common.h"
#include "soc15.h"
#include "vega10_sdma_pkt_open.h"

#include "ivsrcid/sdma0/irqsrcs_sdma0_4_0.h"
#include "ivsrcid/sdma1/irqsrcs_sdma1_4_0.h"

MODULE_FIRMWARE("amdgpu/vega10_sdma.bin");
MODULE_FIRMWARE("amdgpu/vega10_sdma1.bin");
MODULE_FIRMWARE("amdgpu/vega12_sdma.bin");
MODULE_FIRMWARE("amdgpu/vega12_sdma1.bin");
MODULE_FIRMWARE("amdgpu/vega20_sdma.bin");
MODULE_FIRMWARE("amdgpu/vega20_sdma1.bin");
MODULE_FIRMWARE("amdgpu/raven_sdma.bin");
MODULE_FIRMWARE("amdgpu/picasso_sdma.bin");
MODULE_FIRMWARE("amdgpu/raven2_sdma.bin");

#define SDMA0_POWER_CNTL__ON_OFF_CONDITION_HOLD_TIME_MASK  0x000000F8L
#define SDMA0_POWER_CNTL__ON_OFF_STATUS_DURATION_TIME_MASK 0xFC000000L

#define WREG32_SDMA(instance, offset, value) \
        WREG32(sdma_v4_0_get_reg_offset(adev, (instance), (offset)), value)
#define RREG32_SDMA(instance, offset) \
        RREG32(sdma_v4_0_get_reg_offset(adev, (instance), (offset)))

static void sdma_v4_0_set_ring_funcs(struct amdgpu_device *adev);
static void sdma_v4_0_set_buffer_funcs(struct amdgpu_device *adev);
static void sdma_v4_0_set_vm_pte_funcs(struct amdgpu_device *adev);
static void sdma_v4_0_set_irq_funcs(struct amdgpu_device *adev);

static const struct soc15_reg_golden golden_settings_sdma_4[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CHICKEN_BITS, 0xfe931f07, 0x02831d07),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CLK_CTRL, 0xff000ff0, 0x3f000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_PAGE_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_PAGE_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_POWER_CNTL, 0x003ff006, 0x0003c000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_PAGE, 0x000003ff, 0x000003c0),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_WATERMK, 0xfc000000, 0x00000000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_CLK_CTRL, 0xffffffff, 0x3f000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GFX_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GFX_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_PAGE_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_PAGE_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_POWER_CNTL, 0x003ff000, 0x0003c000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC0_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC0_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC1_IB_CNTL, 0x800f0100, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC1_RB_WPTR_POLL_CNTL, 0x0000fff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_UTCL1_PAGE, 0x000003ff, 0x000003c0),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_UTCL1_WATERMK, 0xfc000000, 0x00000000)
};

static const struct soc15_reg_golden golden_settings_sdma_vg10[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG, 0x0018773f, 0x00104002),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00104002),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_CHICKEN_BITS, 0xfe931f07, 0x02831d07),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG, 0x0018773f, 0x00104002),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00104002)
};

static const struct soc15_reg_golden golden_settings_sdma_vg12[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG, 0x0018773f, 0x00104001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00104001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_CHICKEN_BITS, 0xfe931f07, 0x02831d07),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG, 0x0018773f, 0x00104001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00104001)
};

static const struct soc15_reg_golden golden_settings_sdma_4_1[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CHICKEN_BITS, 0xfe931f07, 0x02831d07),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CLK_CTRL, 0xffffffff, 0x3f000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_IB_CNTL, 0x800f0111, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_POWER_CNTL, 0xfc3fffff, 0x40000051),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_IB_CNTL, 0x800f0111, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_IB_CNTL, 0x800f0111, 0x00000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_PAGE, 0x000003ff, 0x000003c0),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_WATERMK, 0xfc000000, 0x00000000)
};

static const struct soc15_reg_golden golden_settings_sdma0_4_2_init[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_RB_WPTR_POLL_CNTL, 0xfffffff0, 0x00403000),
};

static const struct soc15_reg_golden golden_settings_sdma0_4_2[] =
{
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CHICKEN_BITS, 0xfe931f07, 0x02831f07),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_CLK_CTRL, 0xffffffff, 0x3f000100),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG, 0x0000773f, 0x00004002),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG_READ, 0x0000773f, 0x00004002),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GFX_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_PAGE_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_PAGE_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RD_BURST_CNTL, 0x0000000f, 0x00000003),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC0_RB_WPTR_POLL_CNTL, 0xfffffff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC1_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC2_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC2_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC3_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC3_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC4_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC4_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC5_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC5_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC6_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC6_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC7_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_RLC7_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_PAGE, 0x000003ff, 0x000003c0),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_UTCL1_WATERMK, 0xFE000000, 0x00000000),
};

static const struct soc15_reg_golden golden_settings_sdma1_4_2[] = {
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_CHICKEN_BITS, 0xfe931f07, 0x02831f07),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_CLK_CTRL, 0xffffffff, 0x3f000100),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG, 0x0000773f, 0x00004002),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GB_ADDR_CONFIG_READ, 0x0000773f, 0x00004002),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GFX_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_GFX_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_PAGE_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_PAGE_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RD_BURST_CNTL, 0x0000000f, 0x00000003),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC0_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC0_RB_WPTR_POLL_CNTL, 0xfffffff0, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC1_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC1_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC2_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC2_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC3_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC3_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC4_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC4_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC5_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC5_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC6_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC6_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC7_RB_RPTR_ADDR_LO, 0xfffffffd, 0x00000001),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_RLC7_RB_WPTR_POLL_CNTL, 0xfffffff7, 0x00403000),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_UTCL1_PAGE, 0x000003ff, 0x000003c0),
        SOC15_REG_GOLDEN_VALUE(SDMA1, 0, mmSDMA1_UTCL1_WATERMK, 0xFE000000, 0x00000000),
};

static const struct soc15_reg_golden golden_settings_sdma_rv1[] =
{
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG, 0x0018773f, 0x00000002),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00000002)
};

static const struct soc15_reg_golden golden_settings_sdma_rv2[] =
{
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG, 0x0018773f, 0x00003001),
        SOC15_REG_GOLDEN_VALUE(SDMA0, 0, mmSDMA0_GB_ADDR_CONFIG_READ, 0x0018773f, 0x00003001)
};

static u32 sdma_v4_0_get_reg_offset(struct amdgpu_device *adev,
                u32 instance, u32 offset)
{
        return ( 0 == instance ? (adev->reg_offset[SDMA0_HWIP][0][0] + offset) :
                        (adev->reg_offset[SDMA1_HWIP][0][0] + offset));
}

static void sdma_v4_0_init_golden_registers(struct amdgpu_device *adev)
{
        switch (adev->asic_type) {
        case CHIP_VEGA10:
                soc15_program_register_sequence(adev,
                                                 golden_settings_sdma_4,
                                                 ARRAY_SIZE(golden_settings_sdma_4));
                soc15_program_register_sequence(adev,
                                                 golden_settings_sdma_vg10,
                                                 ARRAY_SIZE(golden_settings_sdma_vg10));
                break;
        case CHIP_VEGA12:
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma_4,
                                                ARRAY_SIZE(golden_settings_sdma_4));
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma_vg12,
                                                ARRAY_SIZE(golden_settings_sdma_vg12));
                break;
        case CHIP_VEGA20:
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma0_4_2_init,
                                                ARRAY_SIZE(golden_settings_sdma0_4_2_init));
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma0_4_2,
                                                ARRAY_SIZE(golden_settings_sdma0_4_2));
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma1_4_2,
                                                ARRAY_SIZE(golden_settings_sdma1_4_2));
                break;
        case CHIP_RAVEN:
                soc15_program_register_sequence(adev,
                                                golden_settings_sdma_4_1,
                                                ARRAY_SIZE(golden_settings_sdma_4_1));
                if (adev->rev_id >= 8)
                        soc15_program_register_sequence(adev,
                                                        golden_settings_sdma_rv2,
                                                        ARRAY_SIZE(golden_settings_sdma_rv2));
                else
                        soc15_program_register_sequence(adev,
                                                        golden_settings_sdma_rv1,
                                                        ARRAY_SIZE(golden_settings_sdma_rv1));
                break;
        default:
                break;
        }
}

/**
 * sdma_v4_0_init_microcode - load ucode images from disk
 *
 * @adev: amdgpu_device pointer
 *
 * Use the firmware interface to load the ucode images into
 * the driver (not loaded into hw).
 * Returns 0 on success, error on failure.
 */

// emulation only, won't work on real chip
// vega10 real chip need to use PSP to load firmware
static int sdma_v4_0_init_microcode(struct amdgpu_device *adev)
{
        const char *chip_name;
        char fw_name[30];
        int err = 0, i;
        struct amdgpu_firmware_info *info = NULL;
        const struct common_firmware_header *header = NULL;
        const struct sdma_firmware_header_v1_0 *hdr;

        DRM_DEBUG("\n");

        switch (adev->asic_type) {
        case CHIP_VEGA10:
                chip_name = "vega10";
                break;
        case CHIP_VEGA12:
                chip_name = "vega12";
                break;
        case CHIP_VEGA20:
                chip_name = "vega20";
                break;
        case CHIP_RAVEN:
                if (adev->rev_id >= 8)
                        chip_name = "raven2";
                else if (adev->pdev->device == 0x15d8)
                        chip_name = "picasso";
                else
                        chip_name = "raven";
                break;
        default:
                BUG();
        }

        for (i = 0; i < adev->sdma.num_instances; i++) {
                if (i == 0)
                        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_sdma.bin", chip_name);
                else
                        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_sdma1.bin", chip_name);
                err = request_firmware(&adev->sdma.instance[i].fw, fw_name, adev->dev);
                if (err)
                        goto out;
                err = amdgpu_ucode_validate(adev->sdma.instance[i].fw);
                if (err)
                        goto out;
                hdr = (const struct sdma_firmware_header_v1_0 *)adev->sdma.instance[i].fw->data;
                adev->sdma.instance[i].fw_version = le32_to_cpu(hdr->header.ucode_version);
                adev->sdma.instance[i].feature_version = le32_to_cpu(hdr->ucode_feature_version);
                if (adev->sdma.instance[i].feature_version >= 20)
                        adev->sdma.instance[i].burst_nop = true;
                DRM_DEBUG("psp_load == '%s'\n",
                                adev->firmware.load_type == AMDGPU_FW_LOAD_PSP ? "true" : "false");

                if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
                        info = &adev->firmware.ucode[AMDGPU_UCODE_ID_SDMA0 + i];
                        info->ucode_id = AMDGPU_UCODE_ID_SDMA0 + i;
                        info->fw = adev->sdma.instance[i].fw;
                        header = (const struct common_firmware_header *)info->fw->data;
                        adev->firmware.fw_size +=
                                ALIGN(le32_to_cpu(header->ucode_size_bytes), PAGE_SIZE);
                }
        }
out:
        if (err) {
                DRM_ERROR("sdma_v4_0: Failed to load firmware \"%s\"\n", fw_name);
                for (i = 0; i < adev->sdma.num_instances; i++) {
                        release_firmware(adev->sdma.instance[i].fw);
                        adev->sdma.instance[i].fw = NULL;
                }
        }
        return err;
}

/**
 * sdma_v4_0_ring_get_rptr - get the current read pointer
 *
 * @ring: amdgpu ring pointer
 *
 * Get the current rptr from the hardware (VEGA10+).
 */
static uint64_t sdma_v4_0_ring_get_rptr(struct amdgpu_ring *ring)
{
        u64 *rptr;

        /* XXX check if swapping is necessary on BE */
        rptr = ((u64 *)&ring->adev->wb.wb[ring->rptr_offs]);

        DRM_DEBUG("rptr before shift == 0x%016llx\n", *rptr);
        return ((*rptr) >> 2);
}

/**
 * sdma_v4_0_ring_get_wptr - get the current write pointer
 *
 * @ring: amdgpu ring pointer
 *
 * Get the current wptr from the hardware (VEGA10+).
 */
static uint64_t sdma_v4_0_ring_get_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;
        u64 wptr;

        if (ring->use_doorbell) {
                /* XXX check if swapping is necessary on BE */
                wptr = READ_ONCE(*((u64 *)&adev->wb.wb[ring->wptr_offs]));
                DRM_DEBUG("wptr/doorbell before shift == 0x%016llx\n", wptr);
        } else {
                wptr = RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR_HI);
                wptr = wptr << 32;
                wptr |= RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR);
                DRM_DEBUG("wptr before shift [%i] wptr == 0x%016llx\n",
                                ring->me, wptr);
        }

        return wptr >> 2;
}

/**
 * sdma_v4_0_ring_set_wptr - commit the write pointer
 *
 * @ring: amdgpu ring pointer
 *
 * Write the wptr back to the hardware (VEGA10+).
 */
static void sdma_v4_0_ring_set_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;

        DRM_DEBUG("Setting write pointer\n");
        if (ring->use_doorbell) {
                u64 *wb = (u64 *)&adev->wb.wb[ring->wptr_offs];

                DRM_DEBUG("Using doorbell -- "
                                "wptr_offs == 0x%08x "
                                "lower_32_bits(ring->wptr) << 2 == 0x%08x "
                                "upper_32_bits(ring->wptr) << 2 == 0x%08x\n",
                                ring->wptr_offs,
                                lower_32_bits(ring->wptr << 2),
                                upper_32_bits(ring->wptr << 2));
                /* XXX check if swapping is necessary on BE */
                WRITE_ONCE(*wb, (ring->wptr << 2));
                DRM_DEBUG("calling WDOORBELL64(0x%08x, 0x%016llx)\n",
                                ring->doorbell_index, ring->wptr << 2);
                WDOORBELL64(ring->doorbell_index, ring->wptr << 2);
        } else {
                DRM_DEBUG("Not using doorbell -- "
                                "mmSDMA%i_GFX_RB_WPTR == 0x%08x "
                                "mmSDMA%i_GFX_RB_WPTR_HI == 0x%08x\n",
                                ring->me,
                                lower_32_bits(ring->wptr << 2),
                                ring->me,
                                upper_32_bits(ring->wptr << 2));
                WREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR,
                            lower_32_bits(ring->wptr << 2));
                WREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR_HI,
                            upper_32_bits(ring->wptr << 2));
        }
}

/**
 * sdma_v4_0_page_ring_get_wptr - get the current write pointer
 *
 * @ring: amdgpu ring pointer
 *
 * Get the current wptr from the hardware (VEGA10+).
 */
static uint64_t sdma_v4_0_page_ring_get_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;
        u64 wptr;

        if (ring->use_doorbell) {
                /* XXX check if swapping is necessary on BE */
                wptr = READ_ONCE(*((u64 *)&adev->wb.wb[ring->wptr_offs]));
        } else {
                wptr = RREG32_SDMA(ring->me, mmSDMA0_PAGE_RB_WPTR_HI);
                wptr = wptr << 32;
                wptr |= RREG32_SDMA(ring->me, mmSDMA0_PAGE_RB_WPTR);
        }

        return wptr >> 2;
}

/**
 * sdma_v4_0_ring_set_wptr - commit the write pointer
 *
 * @ring: amdgpu ring pointer
 *
 * Write the wptr back to the hardware (VEGA10+).
 */
static void sdma_v4_0_page_ring_set_wptr(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;

        if (ring->use_doorbell) {
                u64 *wb = (u64 *)&adev->wb.wb[ring->wptr_offs];

                /* XXX check if swapping is necessary on BE */
                WRITE_ONCE(*wb, (ring->wptr << 2));
                WDOORBELL64(ring->doorbell_index, ring->wptr << 2);
        } else {
                uint64_t wptr = ring->wptr << 2;

                WREG32_SDMA(ring->me, mmSDMA0_PAGE_RB_WPTR,
                            lower_32_bits(wptr));
                WREG32_SDMA(ring->me, mmSDMA0_PAGE_RB_WPTR_HI,
                            upper_32_bits(wptr));
        }
}

static void sdma_v4_0_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
{
        struct amdgpu_sdma_instance *sdma = amdgpu_sdma_get_instance_from_ring(ring);
        int i;

        for (i = 0; i < count; i++)
                if (sdma && sdma->burst_nop && (i == 0))
                        amdgpu_ring_write(ring, ring->funcs->nop |
                                SDMA_PKT_NOP_HEADER_COUNT(count - 1));
                else
                        amdgpu_ring_write(ring, ring->funcs->nop);
}

/**
 * sdma_v4_0_ring_emit_ib - Schedule an IB on the DMA engine
 *
 * @ring: amdgpu ring pointer
 * @ib: IB object to schedule
 *
 * Schedule an IB in the DMA ring (VEGA10).
 */
static void sdma_v4_0_ring_emit_ib(struct amdgpu_ring *ring,
                                   struct amdgpu_job *job,
                                   struct amdgpu_ib *ib,
                                   bool ctx_switch)
{
        unsigned vmid = AMDGPU_JOB_GET_VMID(job);

        /* IB packet must end on a 8 DW boundary */
        sdma_v4_0_ring_insert_nop(ring, (10 - (lower_32_bits(ring->wptr) & 7)) % 8);

        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_INDIRECT) |
                          SDMA_PKT_INDIRECT_HEADER_VMID(vmid & 0xf));
        /* base must be 32 byte aligned */
        amdgpu_ring_write(ring, lower_32_bits(ib->gpu_addr) & 0xffffffe0);
        amdgpu_ring_write(ring, upper_32_bits(ib->gpu_addr));
        amdgpu_ring_write(ring, ib->length_dw);
        amdgpu_ring_write(ring, 0);
        amdgpu_ring_write(ring, 0);

}

static void sdma_v4_0_wait_reg_mem(struct amdgpu_ring *ring,
                                   int mem_space, int hdp,
                                   uint32_t addr0, uint32_t addr1,
                                   uint32_t ref, uint32_t mask,
                                   uint32_t inv)
{
        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_POLL_REGMEM) |
                          SDMA_PKT_POLL_REGMEM_HEADER_HDP_FLUSH(hdp) |
                          SDMA_PKT_POLL_REGMEM_HEADER_MEM_POLL(mem_space) |
                          SDMA_PKT_POLL_REGMEM_HEADER_FUNC(3)); /* == */
        if (mem_space) {
                /* memory */
                amdgpu_ring_write(ring, addr0);
                amdgpu_ring_write(ring, addr1);
        } else {
                /* registers */
                amdgpu_ring_write(ring, addr0 << 2);
                amdgpu_ring_write(ring, addr1 << 2);
        }
        amdgpu_ring_write(ring, ref); /* reference */
        amdgpu_ring_write(ring, mask); /* mask */
        amdgpu_ring_write(ring, SDMA_PKT_POLL_REGMEM_DW5_RETRY_COUNT(0xfff) |
                          SDMA_PKT_POLL_REGMEM_DW5_INTERVAL(inv)); /* retry count, poll interval */
}

/**
 * sdma_v4_0_ring_emit_hdp_flush - emit an hdp flush on the DMA ring
 *
 * @ring: amdgpu ring pointer
 *
 * Emit an hdp flush packet on the requested DMA ring.
 */
static void sdma_v4_0_ring_emit_hdp_flush(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;
        u32 ref_and_mask = 0;
        const struct nbio_hdp_flush_reg *nbio_hf_reg = adev->nbio_funcs->hdp_flush_reg;

        if (ring->me == 0)
                ref_and_mask = nbio_hf_reg->ref_and_mask_sdma0;
        else
                ref_and_mask = nbio_hf_reg->ref_and_mask_sdma1;

        sdma_v4_0_wait_reg_mem(ring, 0, 1,
                               adev->nbio_funcs->get_hdp_flush_done_offset(adev),
                               adev->nbio_funcs->get_hdp_flush_req_offset(adev),
                               ref_and_mask, ref_and_mask, 10);
}

/**
 * sdma_v4_0_ring_emit_fence - emit a fence on the DMA ring
 *
 * @ring: amdgpu ring pointer
 * @fence: amdgpu fence object
 *
 * Add a DMA fence packet to the ring to write
 * the fence seq number and DMA trap packet to generate
 * an interrupt if needed (VEGA10).
 */
static void sdma_v4_0_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
                                      unsigned flags)
{
        bool write64bit = flags & AMDGPU_FENCE_FLAG_64BIT;
        /* write the fence */
        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_FENCE));
        /* zero in first two bits */
        BUG_ON(addr & 0x3);
        amdgpu_ring_write(ring, lower_32_bits(addr));
        amdgpu_ring_write(ring, upper_32_bits(addr));
        amdgpu_ring_write(ring, lower_32_bits(seq));

        /* optionally write high bits as well */
        if (write64bit) {
                addr += 4;
                amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_FENCE));
                /* zero in first two bits */
                BUG_ON(addr & 0x3);
                amdgpu_ring_write(ring, lower_32_bits(addr));
                amdgpu_ring_write(ring, upper_32_bits(addr));
                amdgpu_ring_write(ring, upper_32_bits(seq));
        }

        /* generate an interrupt */
        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_TRAP));
        amdgpu_ring_write(ring, SDMA_PKT_TRAP_INT_CONTEXT_INT_CONTEXT(0));
}


/**
 * sdma_v4_0_gfx_stop - stop the gfx async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Stop the gfx async dma ring buffers (VEGA10).
 */
static void sdma_v4_0_gfx_stop(struct amdgpu_device *adev)
{
        struct amdgpu_ring *sdma0 = &adev->sdma.instance[0].ring;
        struct amdgpu_ring *sdma1 = &adev->sdma.instance[1].ring;
        u32 rb_cntl, ib_cntl;
        int i;

        if ((adev->mman.buffer_funcs_ring == sdma0) ||
            (adev->mman.buffer_funcs_ring == sdma1))
                        amdgpu_ttm_set_buffer_funcs_status(adev, false);

        for (i = 0; i < adev->sdma.num_instances; i++) {
                rb_cntl = RREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL);
                rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 0);
                WREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL, rb_cntl);
                ib_cntl = RREG32_SDMA(i, mmSDMA0_GFX_IB_CNTL);
                ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_GFX_IB_CNTL, IB_ENABLE, 0);
                WREG32_SDMA(i, mmSDMA0_GFX_IB_CNTL, ib_cntl);
        }

        sdma0->sched.ready = false;
        sdma1->sched.ready = false;
}

/**
 * sdma_v4_0_rlc_stop - stop the compute async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Stop the compute async dma queues (VEGA10).
 */
static void sdma_v4_0_rlc_stop(struct amdgpu_device *adev)
{
        /* XXX todo */
}

/**
 * sdma_v4_0_page_stop - stop the page async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Stop the page async dma ring buffers (VEGA10).
 */
static void sdma_v4_0_page_stop(struct amdgpu_device *adev)
{
        struct amdgpu_ring *sdma0 = &adev->sdma.instance[0].page;
        struct amdgpu_ring *sdma1 = &adev->sdma.instance[1].page;
        u32 rb_cntl, ib_cntl;
        int i;

        if ((adev->mman.buffer_funcs_ring == sdma0) ||
            (adev->mman.buffer_funcs_ring == sdma1))
                amdgpu_ttm_set_buffer_funcs_status(adev, false);

        for (i = 0; i < adev->sdma.num_instances; i++) {
                rb_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL);
                rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_PAGE_RB_CNTL,
                                        RB_ENABLE, 0);
                WREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL, rb_cntl);
                ib_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_IB_CNTL);
                ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_PAGE_IB_CNTL,
                                        IB_ENABLE, 0);
                WREG32_SDMA(i, mmSDMA0_PAGE_IB_CNTL, ib_cntl);
        }

        sdma0->sched.ready = false;
        sdma1->sched.ready = false;
}

/**
 * sdma_v_0_ctx_switch_enable - stop the async dma engines context switch
 *
 * @adev: amdgpu_device pointer
 * @enable: enable/disable the DMA MEs context switch.
 *
 * Halt or unhalt the async dma engines context switch (VEGA10).
 */
static void sdma_v4_0_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
{
        u32 f32_cntl, phase_quantum = 0;
        int i;

        if (amdgpu_sdma_phase_quantum) {
                unsigned value = amdgpu_sdma_phase_quantum;
                unsigned unit = 0;

                while (value > (SDMA0_PHASE0_QUANTUM__VALUE_MASK >>
                                SDMA0_PHASE0_QUANTUM__VALUE__SHIFT)) {
                        value = (value + 1) >> 1;
                        unit++;
                }
                if (unit > (SDMA0_PHASE0_QUANTUM__UNIT_MASK >>
                            SDMA0_PHASE0_QUANTUM__UNIT__SHIFT)) {
                        value = (SDMA0_PHASE0_QUANTUM__VALUE_MASK >>
                                 SDMA0_PHASE0_QUANTUM__VALUE__SHIFT);
                        unit = (SDMA0_PHASE0_QUANTUM__UNIT_MASK >>
                                SDMA0_PHASE0_QUANTUM__UNIT__SHIFT);
                        WARN_ONCE(1,
                        "clamping sdma_phase_quantum to %uK clock cycles\n",
                                  value << unit);
                }
                phase_quantum =
                        value << SDMA0_PHASE0_QUANTUM__VALUE__SHIFT |
                        unit  << SDMA0_PHASE0_QUANTUM__UNIT__SHIFT;
        }

        for (i = 0; i < adev->sdma.num_instances; i++) {
                f32_cntl = RREG32_SDMA(i, mmSDMA0_CNTL);
                f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
                                AUTO_CTXSW_ENABLE, enable ? 1 : 0);
                if (enable && amdgpu_sdma_phase_quantum) {
                        WREG32_SDMA(i, mmSDMA0_PHASE0_QUANTUM, phase_quantum);
                        WREG32_SDMA(i, mmSDMA0_PHASE1_QUANTUM, phase_quantum);
                        WREG32_SDMA(i, mmSDMA0_PHASE2_QUANTUM, phase_quantum);
                }
                WREG32_SDMA(i, mmSDMA0_CNTL, f32_cntl);
        }

}

/**
 * sdma_v4_0_enable - stop the async dma engines
 *
 * @adev: amdgpu_device pointer
 * @enable: enable/disable the DMA MEs.
 *
 * Halt or unhalt the async dma engines (VEGA10).
 */
static void sdma_v4_0_enable(struct amdgpu_device *adev, bool enable)
{
        u32 f32_cntl;
        int i;

        if (enable == false) {
                sdma_v4_0_gfx_stop(adev);
                sdma_v4_0_rlc_stop(adev);
                if (adev->sdma.has_page_queue)
                        sdma_v4_0_page_stop(adev);
        }

        for (i = 0; i < adev->sdma.num_instances; i++) {
                f32_cntl = RREG32_SDMA(i, mmSDMA0_F32_CNTL);
                f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_F32_CNTL, HALT, enable ? 0 : 1);
                WREG32_SDMA(i, mmSDMA0_F32_CNTL, f32_cntl);
        }
}

/**
 * sdma_v4_0_rb_cntl - get parameters for rb_cntl
 */
static uint32_t sdma_v4_0_rb_cntl(struct amdgpu_ring *ring, uint32_t rb_cntl)
{
        /* Set ring buffer size in dwords */
        uint32_t rb_bufsz = order_base_2(ring->ring_size / 4);

        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_SIZE, rb_bufsz);
#ifdef __BIG_ENDIAN
        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_SWAP_ENABLE, 1);
        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL,
                                RPTR_WRITEBACK_SWAP_ENABLE, 1);
#endif
        return rb_cntl;
}

/**
 * sdma_v4_0_gfx_resume - setup and start the async dma engines
 *
 * @adev: amdgpu_device pointer
 * @i: instance to resume
 *
 * Set up the gfx DMA ring buffers and enable them (VEGA10).
 * Returns 0 for success, error for failure.
 */
static void sdma_v4_0_gfx_resume(struct amdgpu_device *adev, unsigned int i)
{
        struct amdgpu_ring *ring = &adev->sdma.instance[i].ring;
        u32 rb_cntl, ib_cntl, wptr_poll_cntl;
        u32 wb_offset;
        u32 doorbell;
        u32 doorbell_offset;
        u64 wptr_gpu_addr;

        wb_offset = (ring->rptr_offs * 4);

        rb_cntl = RREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL);
        rb_cntl = sdma_v4_0_rb_cntl(ring, rb_cntl);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL, rb_cntl);

        /* Initialize the ring buffer's read and write pointers */
        WREG32_SDMA(i, mmSDMA0_GFX_RB_RPTR, 0);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_RPTR_HI, 0);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR, 0);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR_HI, 0);

        /* set the wb address whether it's enabled or not */
        WREG32_SDMA(i, mmSDMA0_GFX_RB_RPTR_ADDR_HI,
               upper_32_bits(adev->wb.gpu_addr + wb_offset) & 0xFFFFFFFF);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_RPTR_ADDR_LO,
               lower_32_bits(adev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC);

        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL,
                                RPTR_WRITEBACK_ENABLE, 1);

        WREG32_SDMA(i, mmSDMA0_GFX_RB_BASE, ring->gpu_addr >> 8);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_BASE_HI, ring->gpu_addr >> 40);

        ring->wptr = 0;

        /* before programing wptr to a less value, need set minor_ptr_update first */
        WREG32_SDMA(i, mmSDMA0_GFX_MINOR_PTR_UPDATE, 1);

        doorbell = RREG32_SDMA(i, mmSDMA0_GFX_DOORBELL);
        doorbell_offset = RREG32_SDMA(i, mmSDMA0_GFX_DOORBELL_OFFSET);

        doorbell = REG_SET_FIELD(doorbell, SDMA0_GFX_DOORBELL, ENABLE,
                                 ring->use_doorbell);
        doorbell_offset = REG_SET_FIELD(doorbell_offset,
                                        SDMA0_GFX_DOORBELL_OFFSET,
                                        OFFSET, ring->doorbell_index);
        WREG32_SDMA(i, mmSDMA0_GFX_DOORBELL, doorbell);
        WREG32_SDMA(i, mmSDMA0_GFX_DOORBELL_OFFSET, doorbell_offset);
        adev->nbio_funcs->sdma_doorbell_range(adev, i, ring->use_doorbell,
                                              ring->doorbell_index);

        sdma_v4_0_ring_set_wptr(ring);

        /* set minor_ptr_update to 0 after wptr programed */
        WREG32_SDMA(i, mmSDMA0_GFX_MINOR_PTR_UPDATE, 0);

        /* setup the wptr shadow polling */
        wptr_gpu_addr = adev->wb.gpu_addr + (ring->wptr_offs * 4);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR_POLL_ADDR_LO,
                    lower_32_bits(wptr_gpu_addr));
        WREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR_POLL_ADDR_HI,
                    upper_32_bits(wptr_gpu_addr));
        wptr_poll_cntl = RREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR_POLL_CNTL);
        wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl,
                                       SDMA0_GFX_RB_WPTR_POLL_CNTL,
                                       F32_POLL_ENABLE, amdgpu_sriov_vf(adev));
        WREG32_SDMA(i, mmSDMA0_GFX_RB_WPTR_POLL_CNTL, wptr_poll_cntl);

        /* enable DMA RB */
        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 1);
        WREG32_SDMA(i, mmSDMA0_GFX_RB_CNTL, rb_cntl);

        ib_cntl = RREG32_SDMA(i, mmSDMA0_GFX_IB_CNTL);
        ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_GFX_IB_CNTL, IB_ENABLE, 1);
#ifdef __BIG_ENDIAN
        ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_GFX_IB_CNTL, IB_SWAP_ENABLE, 1);
#endif
        /* enable DMA IBs */
        WREG32_SDMA(i, mmSDMA0_GFX_IB_CNTL, ib_cntl);

        ring->sched.ready = true;
}

/**
 * sdma_v4_0_page_resume - setup and start the async dma engines
 *
 * @adev: amdgpu_device pointer
 * @i: instance to resume
 *
 * Set up the page DMA ring buffers and enable them (VEGA10).
 * Returns 0 for success, error for failure.
 */
static void sdma_v4_0_page_resume(struct amdgpu_device *adev, unsigned int i)
{
        struct amdgpu_ring *ring = &adev->sdma.instance[i].page;
        u32 rb_cntl, ib_cntl, wptr_poll_cntl;
        u32 wb_offset;
        u32 doorbell;
        u32 doorbell_offset;
        u64 wptr_gpu_addr;

        wb_offset = (ring->rptr_offs * 4);

        rb_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL);
        rb_cntl = sdma_v4_0_rb_cntl(ring, rb_cntl);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL, rb_cntl);

        /* Initialize the ring buffer's read and write pointers */
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_RPTR, 0);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_RPTR_HI, 0);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR, 0);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR_HI, 0);

        /* set the wb address whether it's enabled or not */
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_RPTR_ADDR_HI,
               upper_32_bits(adev->wb.gpu_addr + wb_offset) & 0xFFFFFFFF);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_RPTR_ADDR_LO,
               lower_32_bits(adev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC);

        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_PAGE_RB_CNTL,
                                RPTR_WRITEBACK_ENABLE, 1);

        WREG32_SDMA(i, mmSDMA0_PAGE_RB_BASE, ring->gpu_addr >> 8);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_BASE_HI, ring->gpu_addr >> 40);

        ring->wptr = 0;

        /* before programing wptr to a less value, need set minor_ptr_update first */
        WREG32_SDMA(i, mmSDMA0_PAGE_MINOR_PTR_UPDATE, 1);

        doorbell = RREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL);
        doorbell_offset = RREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL_OFFSET);

        doorbell = REG_SET_FIELD(doorbell, SDMA0_PAGE_DOORBELL, ENABLE,
                                 ring->use_doorbell);
        doorbell_offset = REG_SET_FIELD(doorbell_offset,
                                        SDMA0_PAGE_DOORBELL_OFFSET,
                                        OFFSET, ring->doorbell_index);
        WREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL, doorbell);
        WREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL_OFFSET, doorbell_offset);

        /* paging queue doorbell range is setup at sdma_v4_0_gfx_resume */
        sdma_v4_0_page_ring_set_wptr(ring);

        /* set minor_ptr_update to 0 after wptr programed */
        WREG32_SDMA(i, mmSDMA0_PAGE_MINOR_PTR_UPDATE, 0);

        /* setup the wptr shadow polling */
        wptr_gpu_addr = adev->wb.gpu_addr + (ring->wptr_offs * 4);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR_POLL_ADDR_LO,
                    lower_32_bits(wptr_gpu_addr));
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR_POLL_ADDR_HI,
                    upper_32_bits(wptr_gpu_addr));
        wptr_poll_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR_POLL_CNTL);
        wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl,
                                       SDMA0_PAGE_RB_WPTR_POLL_CNTL,
                                       F32_POLL_ENABLE, amdgpu_sriov_vf(adev));
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_WPTR_POLL_CNTL, wptr_poll_cntl);

        /* enable DMA RB */
        rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_PAGE_RB_CNTL, RB_ENABLE, 1);
        WREG32_SDMA(i, mmSDMA0_PAGE_RB_CNTL, rb_cntl);

        ib_cntl = RREG32_SDMA(i, mmSDMA0_PAGE_IB_CNTL);
        ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_PAGE_IB_CNTL, IB_ENABLE, 1);
#ifdef __BIG_ENDIAN
        ib_cntl = REG_SET_FIELD(ib_cntl, SDMA0_PAGE_IB_CNTL, IB_SWAP_ENABLE, 1);
#endif
        /* enable DMA IBs */
        WREG32_SDMA(i, mmSDMA0_PAGE_IB_CNTL, ib_cntl);

        ring->sched.ready = true;
}

static void
sdma_v4_1_update_power_gating(struct amdgpu_device *adev, bool enable)
{
        uint32_t def, data;

        if (enable && (adev->pg_flags & AMD_PG_SUPPORT_SDMA)) {
                /* enable idle interrupt */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL));
                data |= SDMA0_CNTL__CTXEMPTY_INT_ENABLE_MASK;

                if (data != def)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL), data);
        } else {
                /* disable idle interrupt */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL));
                data &= ~SDMA0_CNTL__CTXEMPTY_INT_ENABLE_MASK;
                if (data != def)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL), data);
        }
}

static void sdma_v4_1_init_power_gating(struct amdgpu_device *adev)
{
        uint32_t def, data;

        /* Enable HW based PG. */
        def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
        data |= SDMA0_POWER_CNTL__PG_CNTL_ENABLE_MASK;
        if (data != def)
                WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL), data);

        /* enable interrupt */
        def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL));
        data |= SDMA0_CNTL__CTXEMPTY_INT_ENABLE_MASK;
        if (data != def)
                WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CNTL), data);

        /* Configure hold time to filter in-valid power on/off request. Use default right now */

        def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
        data &= ~SDMA0_POWER_CNTL__ON_OFF_CONDITION_HOLD_TIME_MASK;
        data |= (mmSDMA0_POWER_CNTL_DEFAULT & SDMA0_POWER_CNTL__ON_OFF_CONDITION_HOLD_TIME_MASK);
        /* Configure switch time for hysteresis purpose. Use default right now */
        data &= ~SDMA0_POWER_CNTL__ON_OFF_STATUS_DURATION_TIME_MASK;
        data |= (mmSDMA0_POWER_CNTL_DEFAULT & SDMA0_POWER_CNTL__ON_OFF_STATUS_DURATION_TIME_MASK);
        if(data != def)
                WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL), data);
}

static void sdma_v4_0_init_pg(struct amdgpu_device *adev)
{
        if (!(adev->pg_flags & AMD_PG_SUPPORT_SDMA))
                return;

        switch (adev->asic_type) {
        case CHIP_RAVEN:
                sdma_v4_1_init_power_gating(adev);
                sdma_v4_1_update_power_gating(adev, true);
                break;
        default:
                break;
        }
}

/**
 * sdma_v4_0_rlc_resume - setup and start the async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Set up the compute DMA queues and enable them (VEGA10).
 * Returns 0 for success, error for failure.
 */
static int sdma_v4_0_rlc_resume(struct amdgpu_device *adev)
{
        sdma_v4_0_init_pg(adev);

        return 0;
}

/**
 * sdma_v4_0_load_microcode - load the sDMA ME ucode
 *
 * @adev: amdgpu_device pointer
 *
 * Loads the sDMA0/1 ucode.
 * Returns 0 for success, -EINVAL if the ucode is not available.
 */
static int sdma_v4_0_load_microcode(struct amdgpu_device *adev)
{
        const struct sdma_firmware_header_v1_0 *hdr;
        const __le32 *fw_data;
        u32 fw_size;
        int i, j;

        /* halt the MEs */
        sdma_v4_0_enable(adev, false);

        for (i = 0; i < adev->sdma.num_instances; i++) {
                if (!adev->sdma.instance[i].fw)
                        return -EINVAL;

                hdr = (const struct sdma_firmware_header_v1_0 *)adev->sdma.instance[i].fw->data;
                amdgpu_ucode_print_sdma_hdr(&hdr->header);
                fw_size = le32_to_cpu(hdr->header.ucode_size_bytes) / 4;

                fw_data = (const __le32 *)
                        (adev->sdma.instance[i].fw->data +
                                le32_to_cpu(hdr->header.ucode_array_offset_bytes));

                WREG32_SDMA(i, mmSDMA0_UCODE_ADDR, 0);

                for (j = 0; j < fw_size; j++)
                        WREG32_SDMA(i, mmSDMA0_UCODE_DATA,
                                    le32_to_cpup(fw_data++));

                WREG32_SDMA(i, mmSDMA0_UCODE_ADDR,
                            adev->sdma.instance[i].fw_version);
        }

        return 0;
}

/**
 * sdma_v4_0_start - setup and start the async dma engines
 *
 * @adev: amdgpu_device pointer
 *
 * Set up the DMA engines and enable them (VEGA10).
 * Returns 0 for success, error for failure.
 */
static int sdma_v4_0_start(struct amdgpu_device *adev)
{
        struct amdgpu_ring *ring;
        int i, r;

        if (amdgpu_sriov_vf(adev)) {
                sdma_v4_0_ctx_switch_enable(adev, false);
                sdma_v4_0_enable(adev, false);
        } else {

                if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                        r = sdma_v4_0_load_microcode(adev);
                        if (r)
                                return r;
                }

                /* unhalt the MEs */
                sdma_v4_0_enable(adev, true);
                /* enable sdma ring preemption */
                sdma_v4_0_ctx_switch_enable(adev, true);
        }

        /* start the gfx rings and rlc compute queues */
        for (i = 0; i < adev->sdma.num_instances; i++) {
                uint32_t temp;

                WREG32_SDMA(i, mmSDMA0_SEM_WAIT_FAIL_TIMER_CNTL, 0);
                sdma_v4_0_gfx_resume(adev, i);
                if (adev->sdma.has_page_queue)
                        sdma_v4_0_page_resume(adev, i);

                /* set utc l1 enable flag always to 1 */
                temp = RREG32_SDMA(i, mmSDMA0_CNTL);
                temp = REG_SET_FIELD(temp, SDMA0_CNTL, UTC_L1_ENABLE, 1);
                WREG32_SDMA(i, mmSDMA0_CNTL, temp);

                if (!amdgpu_sriov_vf(adev)) {
                        /* unhalt engine */
                        temp = RREG32_SDMA(i, mmSDMA0_F32_CNTL);
                        temp = REG_SET_FIELD(temp, SDMA0_F32_CNTL, HALT, 0);
                        WREG32_SDMA(i, mmSDMA0_F32_CNTL, temp);
                }
        }

        if (amdgpu_sriov_vf(adev)) {
                sdma_v4_0_ctx_switch_enable(adev, true);
                sdma_v4_0_enable(adev, true);
        } else {
                r = sdma_v4_0_rlc_resume(adev);
                if (r)
                        return r;
        }

        for (i = 0; i < adev->sdma.num_instances; i++) {
                ring = &adev->sdma.instance[i].ring;

                r = amdgpu_ring_test_helper(ring);
                if (r)
                        return r;

                if (adev->sdma.has_page_queue) {
                        struct amdgpu_ring *page = &adev->sdma.instance[i].page;

                        r = amdgpu_ring_test_helper(page);
                        if (r)
                                return r;

                        if (adev->mman.buffer_funcs_ring == page)
                                amdgpu_ttm_set_buffer_funcs_status(adev, true);
                }

                if (adev->mman.buffer_funcs_ring == ring)
                        amdgpu_ttm_set_buffer_funcs_status(adev, true);
        }

        return r;
}

/**
 * sdma_v4_0_ring_test_ring - simple async dma engine test
 *
 * @ring: amdgpu_ring structure holding ring information
 *
 * Test the DMA engine by writing using it to write an
 * value to memory. (VEGA10).
 * Returns 0 for success, error for failure.
 */
static int sdma_v4_0_ring_test_ring(struct amdgpu_ring *ring)
{
        struct amdgpu_device *adev = ring->adev;
        unsigned i;
        unsigned index;
        int r;
        u32 tmp;
        u64 gpu_addr;

        r = amdgpu_device_wb_get(adev, &index);
        if (r)
                return r;

        gpu_addr = adev->wb.gpu_addr + (index * 4);
        tmp = 0xCAFEDEAD;
        adev->wb.wb[index] = cpu_to_le32(tmp);

        r = amdgpu_ring_alloc(ring, 5);
        if (r)
                goto error_free_wb;

        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_WRITE) |
                          SDMA_PKT_HEADER_SUB_OP(SDMA_SUBOP_WRITE_LINEAR));
        amdgpu_ring_write(ring, lower_32_bits(gpu_addr));
        amdgpu_ring_write(ring, upper_32_bits(gpu_addr));
        amdgpu_ring_write(ring, SDMA_PKT_WRITE_UNTILED_DW_3_COUNT(0));
        amdgpu_ring_write(ring, 0xDEADBEEF);
        amdgpu_ring_commit(ring);

        for (i = 0; i < adev->usec_timeout; i++) {
                tmp = le32_to_cpu(adev->wb.wb[index]);
                if (tmp == 0xDEADBEEF)
                        break;
                DRM_UDELAY(1);
        }

        if (i >= adev->usec_timeout)
                r = -ETIMEDOUT;

error_free_wb:
        amdgpu_device_wb_free(adev, index);
        return r;
}

/**
 * sdma_v4_0_ring_test_ib - test an IB on the DMA engine
 *
 * @ring: amdgpu_ring structure holding ring information
 *
 * Test a simple IB in the DMA ring (VEGA10).
 * Returns 0 on success, error on failure.
 */
static int sdma_v4_0_ring_test_ib(struct amdgpu_ring *ring, long timeout)
{
        struct amdgpu_device *adev = ring->adev;
        struct amdgpu_ib ib;
        struct dma_fence *f = NULL;
        unsigned index;
        long r;
        u32 tmp = 0;
        u64 gpu_addr;

        r = amdgpu_device_wb_get(adev, &index);
        if (r)
                return r;

        gpu_addr = adev->wb.gpu_addr + (index * 4);
        tmp = 0xCAFEDEAD;
        adev->wb.wb[index] = cpu_to_le32(tmp);
        memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(adev, NULL, 256, &ib);
        if (r)
                goto err0;

        ib.ptr[0] = SDMA_PKT_HEADER_OP(SDMA_OP_WRITE) |
                SDMA_PKT_HEADER_SUB_OP(SDMA_SUBOP_WRITE_LINEAR);
        ib.ptr[1] = lower_32_bits(gpu_addr);
        ib.ptr[2] = upper_32_bits(gpu_addr);
        ib.ptr[3] = SDMA_PKT_WRITE_UNTILED_DW_3_COUNT(0);
        ib.ptr[4] = 0xDEADBEEF;
        ib.ptr[5] = SDMA_PKT_NOP_HEADER_OP(SDMA_OP_NOP);
        ib.ptr[6] = SDMA_PKT_NOP_HEADER_OP(SDMA_OP_NOP);
        ib.ptr[7] = SDMA_PKT_NOP_HEADER_OP(SDMA_OP_NOP);
        ib.length_dw = 8;

        r = amdgpu_ib_schedule(ring, 1, &ib, NULL, &f);
        if (r)
                goto err1;

        r = dma_fence_wait_timeout(f, false, timeout);
        if (r == 0) {
                r = -ETIMEDOUT;
                goto err1;
        } else if (r < 0) {
                goto err1;
        }
        tmp = le32_to_cpu(adev->wb.wb[index]);
        if (tmp == 0xDEADBEEF)
                r = 0;
        else
                r = -EINVAL;

err1:
        amdgpu_ib_free(adev, &ib, NULL);
        dma_fence_put(f);
err0:
        amdgpu_device_wb_free(adev, index);
        return r;
}


/**
 * sdma_v4_0_vm_copy_pte - update PTEs by copying them from the GART
 *
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @src: src addr to copy from
 * @count: number of page entries to update
 *
 * Update PTEs by copying them from the GART using sDMA (VEGA10).
 */
static void sdma_v4_0_vm_copy_pte(struct amdgpu_ib *ib,
                                  uint64_t pe, uint64_t src,
                                  unsigned count)
{
        unsigned bytes = count * 8;

        ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_COPY) |
                SDMA_PKT_HEADER_SUB_OP(SDMA_SUBOP_COPY_LINEAR);
        ib->ptr[ib->length_dw++] = bytes - 1;
        ib->ptr[ib->length_dw++] = 0; /* src/dst endian swap */
        ib->ptr[ib->length_dw++] = lower_32_bits(src);
        ib->ptr[ib->length_dw++] = upper_32_bits(src);
        ib->ptr[ib->length_dw++] = lower_32_bits(pe);
        ib->ptr[ib->length_dw++] = upper_32_bits(pe);

}

/**
 * sdma_v4_0_vm_write_pte - update PTEs by writing them manually
 *
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @addr: dst addr to write into pe
 * @count: number of page entries to update
 * @incr: increase next addr by incr bytes
 * @flags: access flags
 *
 * Update PTEs by writing them manually using sDMA (VEGA10).
 */
static void sdma_v4_0_vm_write_pte(struct amdgpu_ib *ib, uint64_t pe,
                                   uint64_t value, unsigned count,
                                   uint32_t incr)
{
        unsigned ndw = count * 2;

        ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_WRITE) |
                SDMA_PKT_HEADER_SUB_OP(SDMA_SUBOP_WRITE_LINEAR);
        ib->ptr[ib->length_dw++] = lower_32_bits(pe);
        ib->ptr[ib->length_dw++] = upper_32_bits(pe);
        ib->ptr[ib->length_dw++] = ndw - 1;
        for (; ndw > 0; ndw -= 2) {
                ib->ptr[ib->length_dw++] = lower_32_bits(value);
                ib->ptr[ib->length_dw++] = upper_32_bits(value);
                value += incr;
        }
}

/**
 * sdma_v4_0_vm_set_pte_pde - update the page tables using sDMA
 *
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @addr: dst addr to write into pe
 * @count: number of page entries to update
 * @incr: increase next addr by incr bytes
 * @flags: access flags
 *
 * Update the page tables using sDMA (VEGA10).
 */
static void sdma_v4_0_vm_set_pte_pde(struct amdgpu_ib *ib,
                                     uint64_t pe,
                                     uint64_t addr, unsigned count,
                                     uint32_t incr, uint64_t flags)
{
        /* for physically contiguous pages (vram) */
        ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_PTEPDE);
        ib->ptr[ib->length_dw++] = lower_32_bits(pe); /* dst addr */
        ib->ptr[ib->length_dw++] = upper_32_bits(pe);
        ib->ptr[ib->length_dw++] = lower_32_bits(flags); /* mask */
        ib->ptr[ib->length_dw++] = upper_32_bits(flags);
        ib->ptr[ib->length_dw++] = lower_32_bits(addr); /* value */
        ib->ptr[ib->length_dw++] = upper_32_bits(addr);
        ib->ptr[ib->length_dw++] = incr; /* increment size */
        ib->ptr[ib->length_dw++] = 0;
        ib->ptr[ib->length_dw++] = count - 1; /* number of entries */
}

/**
 * sdma_v4_0_ring_pad_ib - pad the IB to the required number of dw
 *
 * @ib: indirect buffer to fill with padding
 *
 */
static void sdma_v4_0_ring_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib)
{
        struct amdgpu_sdma_instance *sdma = amdgpu_sdma_get_instance_from_ring(ring);
        u32 pad_count;
        int i;

        pad_count = (8 - (ib->length_dw & 0x7)) % 8;
        for (i = 0; i < pad_count; i++)
                if (sdma && sdma->burst_nop && (i == 0))
                        ib->ptr[ib->length_dw++] =
                                SDMA_PKT_HEADER_OP(SDMA_OP_NOP) |
                                SDMA_PKT_NOP_HEADER_COUNT(pad_count - 1);
                else
                        ib->ptr[ib->length_dw++] =
                                SDMA_PKT_HEADER_OP(SDMA_OP_NOP);
}


/**
 * sdma_v4_0_ring_emit_pipeline_sync - sync the pipeline
 *
 * @ring: amdgpu_ring pointer
 *
 * Make sure all previous operations are completed (CIK).
 */
static void sdma_v4_0_ring_emit_pipeline_sync(struct amdgpu_ring *ring)
{
        uint32_t seq = ring->fence_drv.sync_seq;
        uint64_t addr = ring->fence_drv.gpu_addr;

        /* wait for idle */
        sdma_v4_0_wait_reg_mem(ring, 1, 0,
                               addr & 0xfffffffc,
                               upper_32_bits(addr) & 0xffffffff,
                               seq, 0xffffffff, 4);
}


/**
 * sdma_v4_0_ring_emit_vm_flush - vm flush using sDMA
 *
 * @ring: amdgpu_ring pointer
 * @vm: amdgpu_vm pointer
 *
 * Update the page table base and flush the VM TLB
 * using sDMA (VEGA10).
 */
static void sdma_v4_0_ring_emit_vm_flush(struct amdgpu_ring *ring,
                                         unsigned vmid, uint64_t pd_addr)
{
        amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
}

static void sdma_v4_0_ring_emit_wreg(struct amdgpu_ring *ring,
                                     uint32_t reg, uint32_t val)
{
        amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_SRBM_WRITE) |
                          SDMA_PKT_SRBM_WRITE_HEADER_BYTE_EN(0xf));
        amdgpu_ring_write(ring, reg);
        amdgpu_ring_write(ring, val);
}

static void sdma_v4_0_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
                                         uint32_t val, uint32_t mask)
{
        sdma_v4_0_wait_reg_mem(ring, 0, 0, reg, 0, val, mask, 10);
}

static bool sdma_v4_0_fw_support_paging_queue(struct amdgpu_device *adev)
{
        uint fw_version = adev->sdma.instance[0].fw_version;

        switch (adev->asic_type) {
        case CHIP_VEGA10:
                return fw_version >= 430;
        case CHIP_VEGA12:
                /*return fw_version >= 31;*/
                return false;
        case CHIP_VEGA20:
                return fw_version >= 123;
        default:
                return false;
        }
}

static int sdma_v4_0_early_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int r;

        if (adev->asic_type == CHIP_RAVEN)
                adev->sdma.num_instances = 1;
        else
                adev->sdma.num_instances = 2;

        r = sdma_v4_0_init_microcode(adev);
        if (r) {
                DRM_ERROR("Failed to load sdma firmware!\n");
                return r;
        }

        /* TODO: Page queue breaks driver reload under SRIOV */
        if ((adev->asic_type == CHIP_VEGA10) && amdgpu_sriov_vf((adev)))
                adev->sdma.has_page_queue = false;
        else if (sdma_v4_0_fw_support_paging_queue(adev))
                adev->sdma.has_page_queue = true;

        sdma_v4_0_set_ring_funcs(adev);
        sdma_v4_0_set_buffer_funcs(adev);
        sdma_v4_0_set_vm_pte_funcs(adev);
        sdma_v4_0_set_irq_funcs(adev);

        return 0;
}

static int sdma_v4_0_sw_init(void *handle)
{
        struct amdgpu_ring *ring;
        int r, i;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        /* SDMA trap event */
        r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_SDMA0, SDMA0_4_0__SRCID__SDMA_TRAP,
                              &adev->sdma.trap_irq);
        if (r)
                return r;

        /* SDMA trap event */
        r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_SDMA1, SDMA1_4_0__SRCID__SDMA_TRAP,
                              &adev->sdma.trap_irq);
        if (r)
                return r;

        for (i = 0; i < adev->sdma.num_instances; i++) {
                ring = &adev->sdma.instance[i].ring;
                ring->ring_obj = NULL;
                ring->use_doorbell = true;

                DRM_INFO("use_doorbell being set to: [%s]\n",
                                ring->use_doorbell?"true":"false");

                /* doorbell size is 2 dwords, get DWORD offset */
                ring->doorbell_index = (i == 0) ?
                        (adev->doorbell_index.sdma_engine0 << 1)
                        : (adev->doorbell_index.sdma_engine1 << 1);

                sprintf(ring->name, "sdma%d", i);
                r = amdgpu_ring_init(adev, ring, 1024,
                                     &adev->sdma.trap_irq,
                                     (i == 0) ?
                                     AMDGPU_SDMA_IRQ_TRAP0 :
                                     AMDGPU_SDMA_IRQ_TRAP1);
                if (r)
                        return r;

                if (adev->sdma.has_page_queue) {
                        ring = &adev->sdma.instance[i].page;
                        ring->ring_obj = NULL;
                        ring->use_doorbell = true;

                        /* paging queue use same doorbell index/routing as gfx queue
                         * with 0x400 (4096 dwords) offset on second doorbell page
                         */
                        ring->doorbell_index = (i == 0) ?
                                (adev->doorbell_index.sdma_engine0 << 1)
                                : (adev->doorbell_index.sdma_engine1 << 1);
                        ring->doorbell_index += 0x400;

                        sprintf(ring->name, "page%d", i);
                        r = amdgpu_ring_init(adev, ring, 1024,
                                             &adev->sdma.trap_irq,
                                             (i == 0) ?
                                             AMDGPU_SDMA_IRQ_TRAP0 :
                                             AMDGPU_SDMA_IRQ_TRAP1);
                        if (r)
                                return r;
                }
        }

        return r;
}

static int sdma_v4_0_sw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int i;

        for (i = 0; i < adev->sdma.num_instances; i++) {
                amdgpu_ring_fini(&adev->sdma.instance[i].ring);
                if (adev->sdma.has_page_queue)
                        amdgpu_ring_fini(&adev->sdma.instance[i].page);
        }

        for (i = 0; i < adev->sdma.num_instances; i++) {
                release_firmware(adev->sdma.instance[i].fw);
                adev->sdma.instance[i].fw = NULL;
        }

        return 0;
}

static int sdma_v4_0_hw_init(void *handle)
{
        int r;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs &&
                        adev->powerplay.pp_funcs->set_powergating_by_smu)
                amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, false);

        sdma_v4_0_init_golden_registers(adev);

        r = sdma_v4_0_start(adev);

        return r;
}

static int sdma_v4_0_hw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (amdgpu_sriov_vf(adev))
                return 0;

        sdma_v4_0_ctx_switch_enable(adev, false);
        sdma_v4_0_enable(adev, false);

        if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs
                        && adev->powerplay.pp_funcs->set_powergating_by_smu)
                amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, true);

        return 0;
}

static int sdma_v4_0_suspend(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        return sdma_v4_0_hw_fini(adev);
}

static int sdma_v4_0_resume(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        return sdma_v4_0_hw_init(adev);
}

static bool sdma_v4_0_is_idle(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        u32 i;

        for (i = 0; i < adev->sdma.num_instances; i++) {
                u32 tmp = RREG32_SDMA(i, mmSDMA0_STATUS_REG);

                if (!(tmp & SDMA0_STATUS_REG__IDLE_MASK))
                        return false;
        }

        return true;
}

static int sdma_v4_0_wait_for_idle(void *handle)
{
        unsigned i;
        u32 sdma0, sdma1;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        for (i = 0; i < adev->usec_timeout; i++) {
                sdma0 = RREG32_SDMA(0, mmSDMA0_STATUS_REG);
                sdma1 = RREG32_SDMA(1, mmSDMA0_STATUS_REG);

                if (sdma0 & sdma1 & SDMA0_STATUS_REG__IDLE_MASK)
                        return 0;
                udelay(1);
        }
        return -ETIMEDOUT;
}

static int sdma_v4_0_soft_reset(void *handle)
{
        /* todo */

        return 0;
}

static int sdma_v4_0_set_trap_irq_state(struct amdgpu_device *adev,
                                        struct amdgpu_irq_src *source,
                                        unsigned type,
                                        enum amdgpu_interrupt_state state)
{
        unsigned int instance = (type == AMDGPU_SDMA_IRQ_TRAP0) ? 0 : 1;
        u32 sdma_cntl;

        sdma_cntl = RREG32_SDMA(instance, mmSDMA0_CNTL);
        sdma_cntl = REG_SET_FIELD(sdma_cntl, SDMA0_CNTL, TRAP_ENABLE,
                       state == AMDGPU_IRQ_STATE_ENABLE ? 1 : 0);
        WREG32_SDMA(instance, mmSDMA0_CNTL, sdma_cntl);

        return 0;
}

static int sdma_v4_0_process_trap_irq(struct amdgpu_device *adev,
                                      struct amdgpu_irq_src *source,
                                      struct amdgpu_iv_entry *entry)
{
        uint32_t instance;

        DRM_DEBUG("IH: SDMA trap\n");
        switch (entry->client_id) {
        case SOC15_IH_CLIENTID_SDMA0:
                instance = 0;
                break;
        case SOC15_IH_CLIENTID_SDMA1:
                instance = 1;
                break;
        default:
                return 0;
        }

        switch (entry->ring_id) {
        case 0:
                amdgpu_fence_process(&adev->sdma.instance[instance].ring);
                break;
        case 1:
                if (adev->asic_type == CHIP_VEGA20)
                        amdgpu_fence_process(&adev->sdma.instance[instance].page);
                break;
        case 2:
                /* XXX compute */
                break;
        case 3:
                if (adev->asic_type != CHIP_VEGA20)
                        amdgpu_fence_process(&adev->sdma.instance[instance].page);
                break;
        }
        return 0;
}

static int sdma_v4_0_process_illegal_inst_irq(struct amdgpu_device *adev,
                                              struct amdgpu_irq_src *source,
                                              struct amdgpu_iv_entry *entry)
{
        int instance;

        DRM_ERROR("Illegal instruction in SDMA command stream\n");

        switch (entry->client_id) {
        case SOC15_IH_CLIENTID_SDMA0:
                instance = 0;
                break;
        case SOC15_IH_CLIENTID_SDMA1:
                instance = 1;
                break;
        default:
                return 0;
        }

        switch (entry->ring_id) {
        case 0:
                drm_sched_fault(&adev->sdma.instance[instance].ring.sched);
                break;
        }
        return 0;
}

static void sdma_v4_0_update_medium_grain_clock_gating(
                struct amdgpu_device *adev,
                bool enable)
{
        uint32_t data, def;

        if (enable && (adev->cg_flags & AMD_CG_SUPPORT_SDMA_MGCG)) {
                /* enable sdma0 clock gating */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL));
                data &= ~(SDMA0_CLK_CTRL__SOFT_OVERRIDE7_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE6_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE5_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE4_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE3_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE2_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE1_MASK |
                          SDMA0_CLK_CTRL__SOFT_OVERRIDE0_MASK);
                if (def != data)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL), data);

                if (adev->sdma.num_instances > 1) {
                        def = data = RREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_CLK_CTRL));
                        data &= ~(SDMA1_CLK_CTRL__SOFT_OVERRIDE7_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE6_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE5_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE4_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE3_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE2_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE1_MASK |
                                  SDMA1_CLK_CTRL__SOFT_OVERRIDE0_MASK);
                        if (def != data)
                                WREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_CLK_CTRL), data);
                }
        } else {
                /* disable sdma0 clock gating */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL));
                data |= (SDMA0_CLK_CTRL__SOFT_OVERRIDE7_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE6_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE5_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE4_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE3_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE2_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE1_MASK |
                         SDMA0_CLK_CTRL__SOFT_OVERRIDE0_MASK);

                if (def != data)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL), data);

                if (adev->sdma.num_instances > 1) {
                        def = data = RREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_CLK_CTRL));
                        data |= (SDMA1_CLK_CTRL__SOFT_OVERRIDE7_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE6_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE5_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE4_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE3_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE2_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE1_MASK |
                                 SDMA1_CLK_CTRL__SOFT_OVERRIDE0_MASK);
                        if (def != data)
                                WREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_CLK_CTRL), data);
                }
        }
}


static void sdma_v4_0_update_medium_grain_light_sleep(
                struct amdgpu_device *adev,
                bool enable)
{
        uint32_t data, def;

        if (enable && (adev->cg_flags & AMD_CG_SUPPORT_SDMA_LS)) {
                /* 1-not override: enable sdma0 mem light sleep */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
                data |= SDMA0_POWER_CNTL__MEM_POWER_OVERRIDE_MASK;
                if (def != data)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL), data);

                /* 1-not override: enable sdma1 mem light sleep */
                if (adev->sdma.num_instances > 1) {
                        def = data = RREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_POWER_CNTL));
                        data |= SDMA1_POWER_CNTL__MEM_POWER_OVERRIDE_MASK;
                        if (def != data)
                                WREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_POWER_CNTL), data);
                }
        } else {
                /* 0-override:disable sdma0 mem light sleep */
                def = data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
                data &= ~SDMA0_POWER_CNTL__MEM_POWER_OVERRIDE_MASK;
                if (def != data)
                        WREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL), data);

                /* 0-override:disable sdma1 mem light sleep */
                if (adev->sdma.num_instances > 1) {
                        def = data = RREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_POWER_CNTL));
                        data &= ~SDMA1_POWER_CNTL__MEM_POWER_OVERRIDE_MASK;
                        if (def != data)
                                WREG32(SOC15_REG_OFFSET(SDMA1, 0, mmSDMA1_POWER_CNTL), data);
                }
        }
}

static int sdma_v4_0_set_clockgating_state(void *handle,
                                          enum amd_clockgating_state state)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        if (amdgpu_sriov_vf(adev))
                return 0;

        switch (adev->asic_type) {
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
        case CHIP_RAVEN:
                sdma_v4_0_update_medium_grain_clock_gating(adev,
                                state == AMD_CG_STATE_GATE ? true : false);
                sdma_v4_0_update_medium_grain_light_sleep(adev,
                                state == AMD_CG_STATE_GATE ? true : false);
                break;
        default:
                break;
        }
        return 0;
}

static int sdma_v4_0_set_powergating_state(void *handle,
                                          enum amd_powergating_state state)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        switch (adev->asic_type) {
        case CHIP_RAVEN:
                sdma_v4_1_update_power_gating(adev,
                                state == AMD_PG_STATE_GATE ? true : false);
                break;
        default:
                break;
        }

        return 0;
}

static void sdma_v4_0_get_clockgating_state(void *handle, u32 *flags)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int data;

        if (amdgpu_sriov_vf(adev))
                *flags = 0;

        /* AMD_CG_SUPPORT_SDMA_MGCG */
        data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_CLK_CTRL));
        if (!(data & SDMA0_CLK_CTRL__SOFT_OVERRIDE7_MASK))
                *flags |= AMD_CG_SUPPORT_SDMA_MGCG;

        /* AMD_CG_SUPPORT_SDMA_LS */
        data = RREG32(SOC15_REG_OFFSET(SDMA0, 0, mmSDMA0_POWER_CNTL));
        if (data & SDMA0_POWER_CNTL__MEM_POWER_OVERRIDE_MASK)
                *flags |= AMD_CG_SUPPORT_SDMA_LS;
}

const struct amd_ip_funcs sdma_v4_0_ip_funcs = {
        .name = "sdma_v4_0",
        .early_init = sdma_v4_0_early_init,
        .late_init = NULL,
        .sw_init = sdma_v4_0_sw_init,
        .sw_fini = sdma_v4_0_sw_fini,
        .hw_init = sdma_v4_0_hw_init,
        .hw_fini = sdma_v4_0_hw_fini,
        .suspend = sdma_v4_0_suspend,
        .resume = sdma_v4_0_resume,
        .is_idle = sdma_v4_0_is_idle,
        .wait_for_idle = sdma_v4_0_wait_for_idle,
        .soft_reset = sdma_v4_0_soft_reset,
        .set_clockgating_state = sdma_v4_0_set_clockgating_state,
        .set_powergating_state = sdma_v4_0_set_powergating_state,
        .get_clockgating_state = sdma_v4_0_get_clockgating_state,
};

static const struct amdgpu_ring_funcs sdma_v4_0_ring_funcs = {
        .type = AMDGPU_RING_TYPE_SDMA,
        .align_mask = 0xf,
        .nop = SDMA_PKT_NOP_HEADER_OP(SDMA_OP_NOP),
        .support_64bit_ptrs = true,
        .vmhub = AMDGPU_MMHUB,
        .get_rptr = sdma_v4_0_ring_get_rptr,
        .get_wptr = sdma_v4_0_ring_get_wptr,
        .set_wptr = sdma_v4_0_ring_set_wptr,
        .emit_frame_size =
                6 + /* sdma_v4_0_ring_emit_hdp_flush */
                3 + /* hdp invalidate */
                6 + /* sdma_v4_0_ring_emit_pipeline_sync */
                /* sdma_v4_0_ring_emit_vm_flush */
                SOC15_FLUSH_GPU_TLB_NUM_WREG * 3 +
                SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 6 +
                10 + 10 + 10, /* sdma_v4_0_ring_emit_fence x3 for user fence, vm fence */
        .emit_ib_size = 7 + 6, /* sdma_v4_0_ring_emit_ib */
        .emit_ib = sdma_v4_0_ring_emit_ib,
        .emit_fence = sdma_v4_0_ring_emit_fence,
        .emit_pipeline_sync = sdma_v4_0_ring_emit_pipeline_sync,
        .emit_vm_flush = sdma_v4_0_ring_emit_vm_flush,
        .emit_hdp_flush = sdma_v4_0_ring_emit_hdp_flush,
        .test_ring = sdma_v4_0_ring_test_ring,
        .test_ib = sdma_v4_0_ring_test_ib,
        .insert_nop = sdma_v4_0_ring_insert_nop,
        .pad_ib = sdma_v4_0_ring_pad_ib,
        .emit_wreg = sdma_v4_0_ring_emit_wreg,
        .emit_reg_wait = sdma_v4_0_ring_emit_reg_wait,
        .emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper,
};

static const struct amdgpu_ring_funcs sdma_v4_0_page_ring_funcs = {
        .type = AMDGPU_RING_TYPE_SDMA,
        .align_mask = 0xf,
        .nop = SDMA_PKT_NOP_HEADER_OP(SDMA_OP_NOP),
        .support_64bit_ptrs = true,
        .vmhub = AMDGPU_MMHUB,
        .get_rptr = sdma_v4_0_ring_get_rptr,
        .get_wptr = sdma_v4_0_page_ring_get_wptr,
        .set_wptr = sdma_v4_0_page_ring_set_wptr,
        .emit_frame_size =
                6 + /* sdma_v4_0_ring_emit_hdp_flush */
                3 + /* hdp invalidate */
                6 + /* sdma_v4_0_ring_emit_pipeline_sync */
                /* sdma_v4_0_ring_emit_vm_flush */
                SOC15_FLUSH_GPU_TLB_NUM_WREG * 3 +
                SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 6 +
                10 + 10 + 10, /* sdma_v4_0_ring_emit_fence x3 for user fence, vm fence */
        .emit_ib_size = 7 + 6, /* sdma_v4_0_ring_emit_ib */
        .emit_ib = sdma_v4_0_ring_emit_ib,
        .emit_fence = sdma_v4_0_ring_emit_fence,
        .emit_pipeline_sync = sdma_v4_0_ring_emit_pipeline_sync,
        .emit_vm_flush = sdma_v4_0_ring_emit_vm_flush,
        .emit_hdp_flush = sdma_v4_0_ring_emit_hdp_flush,
        .test_ring = sdma_v4_0_ring_test_ring,
        .test_ib = sdma_v4_0_ring_test_ib,
        .insert_nop = sdma_v4_0_ring_insert_nop,
        .pad_ib = sdma_v4_0_ring_pad_ib,
        .emit_wreg = sdma_v4_0_ring_emit_wreg,
        .emit_reg_wait = sdma_v4_0_ring_emit_reg_wait,
        .emit_reg_write_reg_wait = amdgpu_ring_emit_reg_write_reg_wait_helper,
};

static void sdma_v4_0_set_ring_funcs(struct amdgpu_device *adev)
{
        int i;

        for (i = 0; i < adev->sdma.num_instances; i++) {
                adev->sdma.instance[i].ring.funcs = &sdma_v4_0_ring_funcs;
                adev->sdma.instance[i].ring.me = i;

                if (adev->sdma.has_page_queue) {
                        adev->sdma.instance[i].page.funcs = &sdma_v4_0_page_ring_funcs;
                        adev->sdma.instance[i].page.me = i;
                }
        }
}

static const struct amdgpu_irq_src_funcs sdma_v4_0_trap_irq_funcs = {
        .set = sdma_v4_0_set_trap_irq_state,
        .process = sdma_v4_0_process_trap_irq,
};

static const struct amdgpu_irq_src_funcs sdma_v4_0_illegal_inst_irq_funcs = {
        .process = sdma_v4_0_process_illegal_inst_irq,
};

static void sdma_v4_0_set_irq_funcs(struct amdgpu_device *adev)
{
        adev->sdma.trap_irq.num_types = AMDGPU_SDMA_IRQ_LAST;
        adev->sdma.trap_irq.funcs = &sdma_v4_0_trap_irq_funcs;
        adev->sdma.illegal_inst_irq.funcs = &sdma_v4_0_illegal_inst_irq_funcs;
}

/**
 * sdma_v4_0_emit_copy_buffer - copy buffer using the sDMA engine
 *
 * @ring: amdgpu_ring structure holding ring information
 * @src_offset: src GPU address
 * @dst_offset: dst GPU address
 * @byte_count: number of bytes to xfer
 *
 * Copy GPU buffers using the DMA engine (VEGA10/12).
 * Used by the amdgpu ttm implementation to move pages if
 * registered as the asic copy callback.
 */
static void sdma_v4_0_emit_copy_buffer(struct amdgpu_ib *ib,
                                       uint64_t src_offset,
                                       uint64_t dst_offset,
                                       uint32_t byte_count)
{
        ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_COPY) |
                SDMA_PKT_HEADER_SUB_OP(SDMA_SUBOP_COPY_LINEAR);
        ib->ptr[ib->length_dw++] = byte_count - 1;
        ib->ptr[ib->length_dw++] = 0; /* src/dst endian swap */
        ib->ptr[ib->length_dw++] = lower_32_bits(src_offset);
        ib->ptr[ib->length_dw++] = upper_32_bits(src_offset);
        ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
        ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset);
}

/**
 * sdma_v4_0_emit_fill_buffer - fill buffer using the sDMA engine
 *
 * @ring: amdgpu_ring structure holding ring information
 * @src_data: value to write to buffer
 * @dst_offset: dst GPU address
 * @byte_count: number of bytes to xfer
 *
 * Fill GPU buffers using the DMA engine (VEGA10/12).
 */
static void sdma_v4_0_emit_fill_buffer(struct amdgpu_ib *ib,
                                       uint32_t src_data,
                                       uint64_t dst_offset,
                                       uint32_t byte_count)
{
        ib->ptr[ib->length_dw++] = SDMA_PKT_HEADER_OP(SDMA_OP_CONST_FILL);
        ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
        ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset);
        ib->ptr[ib->length_dw++] = src_data;
        ib->ptr[ib->length_dw++] = byte_count - 1;
}

static const struct amdgpu_buffer_funcs sdma_v4_0_buffer_funcs = {
        .copy_max_bytes = 0x400000,
        .copy_num_dw = 7,
        .emit_copy_buffer = sdma_v4_0_emit_copy_buffer,

        .fill_max_bytes = 0x400000,
        .fill_num_dw = 5,
        .emit_fill_buffer = sdma_v4_0_emit_fill_buffer,
};

static void sdma_v4_0_set_buffer_funcs(struct amdgpu_device *adev)
{
        adev->mman.buffer_funcs = &sdma_v4_0_buffer_funcs;
        if (adev->sdma.has_page_queue)
                adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].page;
        else
                adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
}

static const struct amdgpu_vm_pte_funcs sdma_v4_0_vm_pte_funcs = {
        .copy_pte_num_dw = 7,
        .copy_pte = sdma_v4_0_vm_copy_pte,

        .write_pte = sdma_v4_0_vm_write_pte,
        .set_pte_pde = sdma_v4_0_vm_set_pte_pde,
};

static void sdma_v4_0_set_vm_pte_funcs(struct amdgpu_device *adev)
{
        struct drm_gpu_scheduler *sched;
        unsigned i;

        adev->vm_manager.vm_pte_funcs = &sdma_v4_0_vm_pte_funcs;
        for (i = 0; i < adev->sdma.num_instances; i++) {
                if (adev->sdma.has_page_queue)
                        sched = &adev->sdma.instance[i].page.sched;
                else
                        sched = &adev->sdma.instance[i].ring.sched;
                adev->vm_manager.vm_pte_rqs[i] =
                        &sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
        }
        adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
}

const struct amdgpu_ip_block_version sdma_v4_0_ip_block = {
        .type = AMD_IP_BLOCK_TYPE_SDMA,
        .major = 4,
        .minor = 0,
        .rev = 0,
        .funcs = &sdma_v4_0_ip_funcs,
};