/*
 * Copyright 2019 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 <linux/module.h>
#include "amdgpu.h"
#include "amdgpu_psp.h"
#include "amdgpu_ucode.h"
#include "soc15_common.h"
#include "psp_v12_0.h"

#include "mp/mp_12_0_0_offset.h"
#include "mp/mp_12_0_0_sh_mask.h"
#include "gc/gc_9_0_offset.h"
#include "sdma0/sdma0_4_0_offset.h"
#include "nbio/nbio_7_4_offset.h"

MODULE_FIRMWARE("amdgpu/renoir_asd.bin");
MODULE_FIRMWARE("amdgpu/renoir_ta.bin");
MODULE_FIRMWARE("amdgpu/green_sardine_asd.bin");
MODULE_FIRMWARE("amdgpu/green_sardine_ta.bin");

/* address block */
#define smnMP1_FIRMWARE_FLAGS           0x3010024

static int psp_v12_0_init_microcode(struct psp_context *psp)
{
        struct amdgpu_device *adev = psp->adev;
        char ucode_prefix[30];
        int err = 0;
        DRM_DEBUG("\n");

        amdgpu_ucode_ip_version_decode(adev, MP0_HWIP, ucode_prefix, sizeof(ucode_prefix));

        err = psp_init_asd_microcode(psp, ucode_prefix);
        if (err)
                return err;

        err = psp_init_ta_microcode(psp, ucode_prefix);
        if (err)
                return err;

        /* only supported on renoir */
        if (!(adev->apu_flags & AMD_APU_IS_RENOIR))
                adev->psp.securedisplay_context.context.bin_desc.size_bytes = 0;

        return 0;
}

static int psp_v12_0_bootloader_load_sysdrv(struct psp_context *psp)
{
        int ret;
        uint32_t psp_gfxdrv_command_reg = 0;
        struct amdgpu_device *adev = psp->adev;
        uint32_t sol_reg;

        /* Check sOS sign of life register to confirm sys driver and sOS
         * are already been loaded.
         */
        sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
        if (sol_reg)
                return 0;

        /* Wait for bootloader to signify that is ready having bit 31 of C2PMSG_35 set to 1 */
        ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_35),
                           0x80000000, 0x80000000, 0);
        if (ret)
                return ret;

        /* Copy PSP System Driver binary to memory */
        psp_copy_fw(psp, psp->sys.start_addr, psp->sys.size_bytes);

        /* Provide the sys driver to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
               (uint32_t)(psp->fw_pri_mc_addr >> 20));
        psp_gfxdrv_command_reg = 1 << 16;
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_35,
               psp_gfxdrv_command_reg);

        ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_35),
                           0x80000000, 0x80000000, 0);

        return ret;
}

static int psp_v12_0_bootloader_load_sos(struct psp_context *psp)
{
        int ret;
        unsigned int psp_gfxdrv_command_reg = 0;
        struct amdgpu_device *adev = psp->adev;
        uint32_t sol_reg;

        /* Check sOS sign of life register to confirm sys driver and sOS
         * are already been loaded.
         */
        sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
        if (sol_reg)
                return 0;

        /* Wait for bootloader to signify that is ready having bit 31 of C2PMSG_35 set to 1 */
        ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_35),
                           0x80000000, 0x80000000, 0);
        if (ret)
                return ret;

        /* Copy Secure OS binary to PSP memory */
        psp_copy_fw(psp, psp->sos.start_addr, psp->sos.size_bytes);

        /* Provide the PSP secure OS to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
               (uint32_t)(psp->fw_pri_mc_addr >> 20));
        psp_gfxdrv_command_reg = 2 << 16;
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_35,
               psp_gfxdrv_command_reg);

        ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_81),
                           RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81), 0,
                           PSP_WAITREG_CHANGED);

        return ret;
}

static int psp_v12_0_ring_create(struct psp_context *psp,
                                enum psp_ring_type ring_type)
{
        int ret = 0;
        unsigned int psp_ring_reg = 0;
        struct psp_ring *ring = &psp->km_ring;
        struct amdgpu_device *adev = psp->adev;

        /* Write low address of the ring to C2PMSG_69 */
        psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_69, psp_ring_reg);
        /* Write high address of the ring to C2PMSG_70 */
        psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_70, psp_ring_reg);
        /* Write size of ring to C2PMSG_71 */
        psp_ring_reg = ring->ring_size;
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_71, psp_ring_reg);
        /* Write the ring initialization command to C2PMSG_64 */
        psp_ring_reg = ring_type;
        psp_ring_reg = psp_ring_reg << 16;
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64, psp_ring_reg);

        /* Wait for response flag (bit 31) in C2PMSG_64 */
        ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64),
                           MBOX_TOS_RESP_FLAG, MBOX_TOS_RESP_MASK, 0);

        return ret;
}

static int psp_v12_0_ring_stop(struct psp_context *psp,
                              enum psp_ring_type ring_type)
{
        int ret = 0;
        struct amdgpu_device *adev = psp->adev;

        /* Write the ring destroy command*/
        if (amdgpu_sriov_vf(adev))
                WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_101,
                                     GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
        else
                WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64,
                                     GFX_CTRL_CMD_ID_DESTROY_RINGS);

        /* Wait for response flag (bit 31) */
        if (amdgpu_sriov_vf(adev))
                ret = psp_wait_for(
                        psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_101),
                        MBOX_TOS_RESP_FLAG, MBOX_TOS_RESP_MASK, 0);
        else
                ret = psp_wait_for(
                        psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64),
                        MBOX_TOS_RESP_FLAG, MBOX_TOS_RESP_MASK, 0);

        return ret;
}

static int psp_v12_0_ring_destroy(struct psp_context *psp,
                                 enum psp_ring_type ring_type)
{
        int ret = 0;
        struct psp_ring *ring = &psp->km_ring;
        struct amdgpu_device *adev = psp->adev;

        ret = psp_v12_0_ring_stop(psp, ring_type);
        if (ret)
                DRM_ERROR("Fail to stop psp ring\n");

        amdgpu_bo_free_kernel(&adev->firmware.rbuf,
                              &ring->ring_mem_mc_addr,
                              (void **)&ring->ring_mem);

        return ret;
}

static int psp_v12_0_mode1_reset(struct psp_context *psp)
{
        int ret;
        uint32_t offset;
        struct amdgpu_device *adev = psp->adev;

        offset = SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64);

        ret = psp_wait_for(psp, offset, MBOX_TOS_READY_FLAG,
                           MBOX_TOS_READY_MASK, 0);

        if (ret) {
                DRM_INFO("psp is not working correctly before mode1 reset!\n");
                return -EINVAL;
        }

        /*send the mode 1 reset command*/
        WREG32(offset, GFX_CTRL_CMD_ID_MODE1_RST);

        drm_msleep(500);

        offset = SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_33);

        ret = psp_wait_for(psp, offset, MBOX_TOS_RESP_FLAG, MBOX_TOS_RESP_MASK,
                           0);

        if (ret) {
                DRM_INFO("psp mode 1 reset failed!\n");
                return -EINVAL;
        }

        DRM_INFO("psp mode1 reset succeed \n");

        return 0;
}

static uint32_t psp_v12_0_ring_get_wptr(struct psp_context *psp)
{
        uint32_t data;
        struct amdgpu_device *adev = psp->adev;

        if (amdgpu_sriov_vf(adev))
                data = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_102);
        else
                data = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_67);

        return data;
}

static void psp_v12_0_ring_set_wptr(struct psp_context *psp, uint32_t value)
{
        struct amdgpu_device *adev = psp->adev;

        if (amdgpu_sriov_vf(adev)) {
                WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_102, value);
                WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_101, GFX_CTRL_CMD_ID_CONSUME_CMD);
        } else
                WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_67, value);
}

static const struct psp_funcs psp_v12_0_funcs = {
        .init_microcode = psp_v12_0_init_microcode,
        .bootloader_load_sysdrv = psp_v12_0_bootloader_load_sysdrv,
        .bootloader_load_sos = psp_v12_0_bootloader_load_sos,
        .ring_create = psp_v12_0_ring_create,
        .ring_stop = psp_v12_0_ring_stop,
        .ring_destroy = psp_v12_0_ring_destroy,
        .mode1_reset = psp_v12_0_mode1_reset,
        .ring_get_wptr = psp_v12_0_ring_get_wptr,
        .ring_set_wptr = psp_v12_0_ring_set_wptr,
};

void psp_v12_0_set_psp_funcs(struct psp_context *psp)
{
        psp->funcs = &psp_v12_0_funcs;
}