/*
 * 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 "amdgpu.h"
#include "nbio_v7_0.h"

#include "nbio/nbio_7_0_default.h"
#include "nbio/nbio_7_0_offset.h"
#include "nbio/nbio_7_0_sh_mask.h"
#include "nbio/nbio_7_0_smn.h"
#include "vega10_enum.h"
#include <uapi/linux/kfd_ioctl.h>

#define smnNBIF_MGCG_CTRL_LCLK	0x1013a05c

static void nbio_v7_0_remap_hdp_registers(struct amdgpu_device *adev)
{
	WREG32_SOC15(NBIO, 0, mmREMAP_HDP_MEM_FLUSH_CNTL,
		adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL);
	WREG32_SOC15(NBIO, 0, mmREMAP_HDP_REG_FLUSH_CNTL,
		adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL);
}

static u32 nbio_v7_0_get_rev_id(struct amdgpu_device *adev)
{
	u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);

	tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
	tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;

	return tmp;
}

static void nbio_v7_0_mc_access_enable(struct amdgpu_device *adev, bool enable)
{
	if (enable)
		WREG32_SOC15(NBIO, 0, mmBIF_FB_EN,
			BIF_FB_EN__FB_READ_EN_MASK | BIF_FB_EN__FB_WRITE_EN_MASK);
	else
		WREG32_SOC15(NBIO, 0, mmBIF_FB_EN, 0);
}

static u32 nbio_v7_0_get_memsize(struct amdgpu_device *adev)
{
	return RREG32_SOC15(NBIO, 0, mmRCC_CONFIG_MEMSIZE);
}

static void nbio_v7_0_sdma_doorbell_range(struct amdgpu_device *adev, int instance,
			bool use_doorbell, int doorbell_index, int doorbell_size)
{
	u32 reg = instance == 0 ? SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA0_DOORBELL_RANGE) :
			SOC15_REG_OFFSET(NBIO, 0, mmBIF_SDMA1_DOORBELL_RANGE);

	u32 doorbell_range = RREG32(reg);

	if (use_doorbell) {
		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, OFFSET, doorbell_index);
		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, doorbell_size);
	} else
		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 0);

	WREG32(reg, doorbell_range);
}

static void nbio_v7_0_vcn_doorbell_range(struct amdgpu_device *adev, bool use_doorbell,
					 int doorbell_index, int instance)
{
	u32 reg = SOC15_REG_OFFSET(NBIO, 0, mmBIF_MMSCH0_DOORBELL_RANGE);

	u32 doorbell_range = RREG32(reg);

	if (use_doorbell) {
		doorbell_range = REG_SET_FIELD(doorbell_range,
					       BIF_MMSCH0_DOORBELL_RANGE, OFFSET,
					       doorbell_index);
		doorbell_range = REG_SET_FIELD(doorbell_range,
					       BIF_MMSCH0_DOORBELL_RANGE, SIZE, 8);
	} else
		doorbell_range = REG_SET_FIELD(doorbell_range,
					       BIF_MMSCH0_DOORBELL_RANGE, SIZE, 0);

	WREG32(reg, doorbell_range);
}

static void nbio_v7_0_enable_doorbell_aperture(struct amdgpu_device *adev,
					       bool enable)
{
	WREG32_FIELD15(NBIO, 0, RCC_DOORBELL_APER_EN, BIF_DOORBELL_APER_EN, enable ? 1 : 0);
}

static void nbio_v7_0_enable_doorbell_selfring_aperture(struct amdgpu_device *adev,
							bool enable)
{

}

static void nbio_v7_0_ih_doorbell_range(struct amdgpu_device *adev,
					bool use_doorbell, int doorbell_index)
{
	u32 ih_doorbell_range = RREG32_SOC15(NBIO, 0, mmBIF_IH_DOORBELL_RANGE);

	if (use_doorbell) {
		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, OFFSET, doorbell_index);
		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, SIZE, 2);
	} else
		ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range, BIF_IH_DOORBELL_RANGE, SIZE, 0);

	WREG32_SOC15(NBIO, 0, mmBIF_IH_DOORBELL_RANGE, ih_doorbell_range);
}

static uint32_t nbio_7_0_read_syshub_ind_mmr(struct amdgpu_device *adev, uint32_t offset)
{
	uint32_t data;

	WREG32_SOC15(NBIO, 0, mmSYSHUB_INDEX, offset);
	data = RREG32_SOC15(NBIO, 0, mmSYSHUB_DATA);

	return data;
}

static void nbio_7_0_write_syshub_ind_mmr(struct amdgpu_device *adev, uint32_t offset,
				       uint32_t data)
{
	WREG32_SOC15(NBIO, 0, mmSYSHUB_INDEX, offset);
	WREG32_SOC15(NBIO, 0, mmSYSHUB_DATA, data);
}

static void nbio_v7_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
						       bool enable)
{
	uint32_t def, data;

	/* NBIF_MGCG_CTRL_LCLK */
	def = data = RREG32_PCIE(smnNBIF_MGCG_CTRL_LCLK);

	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_MGCG))
		data |= NBIF_MGCG_CTRL_LCLK__NBIF_MGCG_EN_LCLK_MASK;
	else
		data &= ~NBIF_MGCG_CTRL_LCLK__NBIF_MGCG_EN_LCLK_MASK;

	if (def != data)
		WREG32_PCIE(smnNBIF_MGCG_CTRL_LCLK, data);

	/* SYSHUB_MGCG_CTRL_SOCCLK */
	def = data = nbio_7_0_read_syshub_ind_mmr(adev, ixSYSHUB_MMREG_IND_SYSHUB_MGCG_CTRL_SOCCLK);

	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_MGCG))
		data |= SYSHUB_MMREG_DIRECT_SYSHUB_MGCG_CTRL_SOCCLK__SYSHUB_MGCG_EN_SOCCLK_MASK;
	else
		data &= ~SYSHUB_MMREG_DIRECT_SYSHUB_MGCG_CTRL_SOCCLK__SYSHUB_MGCG_EN_SOCCLK_MASK;

	if (def != data)
		nbio_7_0_write_syshub_ind_mmr(adev, ixSYSHUB_MMREG_IND_SYSHUB_MGCG_CTRL_SOCCLK, data);

	/* SYSHUB_MGCG_CTRL_SHUBCLK */
	def = data = nbio_7_0_read_syshub_ind_mmr(adev, ixSYSHUB_MMREG_IND_SYSHUB_MGCG_CTRL_SHUBCLK);

	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_MGCG))
		data |= SYSHUB_MMREG_DIRECT_SYSHUB_MGCG_CTRL_SHUBCLK__SYSHUB_MGCG_EN_SHUBCLK_MASK;
	else
		data &= ~SYSHUB_MMREG_DIRECT_SYSHUB_MGCG_CTRL_SHUBCLK__SYSHUB_MGCG_EN_SHUBCLK_MASK;

	if (def != data)
		nbio_7_0_write_syshub_ind_mmr(adev, ixSYSHUB_MMREG_IND_SYSHUB_MGCG_CTRL_SHUBCLK, data);
}

static void nbio_v7_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
						      bool enable)
{
	uint32_t def, data;

	def = data = RREG32_PCIE(smnPCIE_CNTL2);
	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_BIF_LS)) {
		data |= (PCIE_CNTL2__SLV_MEM_LS_EN_MASK |
			 PCIE_CNTL2__MST_MEM_LS_EN_MASK |
			 PCIE_CNTL2__REPLAY_MEM_LS_EN_MASK);
	} else {
		data &= ~(PCIE_CNTL2__SLV_MEM_LS_EN_MASK |
			  PCIE_CNTL2__MST_MEM_LS_EN_MASK |
			  PCIE_CNTL2__REPLAY_MEM_LS_EN_MASK);
	}

	if (def != data)
		WREG32_PCIE(smnPCIE_CNTL2, data);
}

static void nbio_v7_0_get_clockgating_state(struct amdgpu_device *adev,
					    u64 *flags)
{
	int data;

	/* AMD_CG_SUPPORT_BIF_MGCG */
	data = RREG32_PCIE(smnCPM_CONTROL);
	if (data & CPM_CONTROL__LCLK_DYN_GATE_ENABLE_MASK)
		*flags |= AMD_CG_SUPPORT_BIF_MGCG;

	/* AMD_CG_SUPPORT_BIF_LS */
	data = RREG32_PCIE(smnPCIE_CNTL2);
	if (data & PCIE_CNTL2__SLV_MEM_LS_EN_MASK)
		*flags |= AMD_CG_SUPPORT_BIF_LS;
}

static void nbio_v7_0_ih_control(struct amdgpu_device *adev)
{
	u32 interrupt_cntl;

	/* setup interrupt control */
	WREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL2, adev->dummy_page_addr >> 8);
	interrupt_cntl = RREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL);
	/* INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
	 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
	 */
	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL, IH_DUMMY_RD_OVERRIDE, 0);
	/* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL, IH_REQ_NONSNOOP_EN, 0);
	WREG32_SOC15(NBIO, 0, mmINTERRUPT_CNTL, interrupt_cntl);
}

static u32 nbio_v7_0_get_hdp_flush_req_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(NBIO, 0, mmGPU_HDP_FLUSH_REQ);
}

static u32 nbio_v7_0_get_hdp_flush_done_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(NBIO, 0, mmGPU_HDP_FLUSH_DONE);
}

static u32 nbio_v7_0_get_pcie_index_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX2);
}

static u32 nbio_v7_0_get_pcie_data_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA2);
}

const struct nbio_hdp_flush_reg nbio_v7_0_hdp_flush_reg = {
	.ref_and_mask_cp0 = GPU_HDP_FLUSH_DONE__CP0_MASK,
	.ref_and_mask_cp1 = GPU_HDP_FLUSH_DONE__CP1_MASK,
	.ref_and_mask_cp2 = GPU_HDP_FLUSH_DONE__CP2_MASK,
	.ref_and_mask_cp3 = GPU_HDP_FLUSH_DONE__CP3_MASK,
	.ref_and_mask_cp4 = GPU_HDP_FLUSH_DONE__CP4_MASK,
	.ref_and_mask_cp5 = GPU_HDP_FLUSH_DONE__CP5_MASK,
	.ref_and_mask_cp6 = GPU_HDP_FLUSH_DONE__CP6_MASK,
	.ref_and_mask_cp7 = GPU_HDP_FLUSH_DONE__CP7_MASK,
	.ref_and_mask_cp8 = GPU_HDP_FLUSH_DONE__CP8_MASK,
	.ref_and_mask_cp9 = GPU_HDP_FLUSH_DONE__CP9_MASK,
	.ref_and_mask_sdma0 = GPU_HDP_FLUSH_DONE__SDMA0_MASK,
	.ref_and_mask_sdma1 = GPU_HDP_FLUSH_DONE__SDMA1_MASK,
};

#define regRCC_DEV0_EPF6_STRAP4                                                                         0xd304
#define regRCC_DEV0_EPF6_STRAP4_BASE_IDX                                                                5

static void nbio_v7_0_init_registers(struct amdgpu_device *adev)
{
	uint32_t data;

	switch (amdgpu_ip_version(adev, NBIO_HWIP, 0)) {
	case IP_VERSION(2, 5, 0):
		data = RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4) & ~BIT(23);
		WREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4, data);
		break;
	}
}

#define MMIO_REG_HOLE_OFFSET (0x80000 - PAGE_SIZE)

static void nbio_v7_0_set_reg_remap(struct amdgpu_device *adev)
{
	if (!amdgpu_sriov_vf(adev) && (PAGE_SIZE <= 4096)) {
		adev->rmmio_remap.reg_offset = MMIO_REG_HOLE_OFFSET;
		adev->rmmio_remap.bus_addr = adev->rmmio_base + MMIO_REG_HOLE_OFFSET;
	} else {
		adev->rmmio_remap.reg_offset =
			SOC15_REG_OFFSET(NBIO, 0, mmHDP_MEM_COHERENCY_FLUSH_CNTL) << 2;
		adev->rmmio_remap.bus_addr = 0;
	}
}

const struct amdgpu_nbio_funcs nbio_v7_0_funcs = {
	.get_hdp_flush_req_offset = nbio_v7_0_get_hdp_flush_req_offset,
	.get_hdp_flush_done_offset = nbio_v7_0_get_hdp_flush_done_offset,
	.get_pcie_index_offset = nbio_v7_0_get_pcie_index_offset,
	.get_pcie_data_offset = nbio_v7_0_get_pcie_data_offset,
	.get_rev_id = nbio_v7_0_get_rev_id,
	.mc_access_enable = nbio_v7_0_mc_access_enable,
	.get_memsize = nbio_v7_0_get_memsize,
	.sdma_doorbell_range = nbio_v7_0_sdma_doorbell_range,
	.vcn_doorbell_range = nbio_v7_0_vcn_doorbell_range,
	.enable_doorbell_aperture = nbio_v7_0_enable_doorbell_aperture,
	.enable_doorbell_selfring_aperture = nbio_v7_0_enable_doorbell_selfring_aperture,
	.ih_doorbell_range = nbio_v7_0_ih_doorbell_range,
	.update_medium_grain_clock_gating = nbio_v7_0_update_medium_grain_clock_gating,
	.update_medium_grain_light_sleep = nbio_v7_0_update_medium_grain_light_sleep,
	.get_clockgating_state = nbio_v7_0_get_clockgating_state,
	.ih_control = nbio_v7_0_ih_control,
	.init_registers = nbio_v7_0_init_registers,
	.remap_hdp_registers = nbio_v7_0_remap_hdp_registers,
	.set_reg_remap = nbio_v7_0_set_reg_remap,
};