/*
 * Copyright 2025 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 <drm/drm_drv.h>
#include <linux/vmalloc.h>
#include "amdgpu.h"
#include "amdgpu_psp.h"
#include "amdgpu_ucode.h"
#include "soc15_common.h"
#include "psp_v15_0.h"

#include "mp/mp_15_0_0_offset.h"
#include "mp/mp_15_0_0_sh_mask.h"

MODULE_FIRMWARE("amdgpu/psp_15_0_0_toc.bin");

static int psp_v15_0_0_init_microcode(struct psp_context *psp)
{
        struct amdgpu_device *adev = psp->adev;
        char ucode_prefix[30];
        int err = 0;

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

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

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

        return 0;
}

static int psp_v15_0_0_ring_stop(struct psp_context *psp,
                               enum psp_ring_type ring_type)
{
        int ret = 0;
        struct amdgpu_device *adev = psp->adev;

        if (amdgpu_sriov_vf(adev)) {
                /* Write the ring destroy command*/
                WREG32_SOC15(MP0, 0, regMPASP_SMN_C2PMSG_101,
                             GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
                /* there might be handshake issue with hardware which needs delay */
                mdelay(20);
                /* Wait for response flag (bit 31) */
                ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMPASP_SMN_C2PMSG_101),
                                   0x80000000, 0x80000000, false);
        } else {
                /* Write the ring destroy command*/
                WREG32_SOC15(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_64,
                             GFX_CTRL_CMD_ID_DESTROY_RINGS);
                /* there might be handshake issue with hardware which needs delay */
                mdelay(20);
                /* Wait for response flag (bit 31) */
                ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_64),
                                   0x80000000, 0x80000000, false);
        }

        return ret;
}

static int psp_v15_0_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;

        if (amdgpu_sriov_vf(adev)) {
                ret = psp_v15_0_0_ring_stop(psp, ring_type);
                if (ret) {
                        DRM_ERROR("psp_v14_0_ring_stop_sriov failed!\n");
                        return ret;
                }

                /* Write low address of the ring to C2PMSG_102 */
                psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
                WREG32_SOC15(MP0, 0, regMPASP_SMN_C2PMSG_102, psp_ring_reg);
                /* Write high address of the ring to C2PMSG_103 */
                psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
                WREG32_SOC15(MP0, 0, regMPASP_SMN_C2PMSG_103, psp_ring_reg);

                /* Write the ring initialization command to C2PMSG_101 */
                WREG32_SOC15(MP0, 0, regMPASP_SMN_C2PMSG_101,
                             GFX_CTRL_CMD_ID_INIT_GPCOM_RING);

                /* there might be handshake issue with hardware which needs delay */
                mdelay(20);

                /* Wait for response flag (bit 31) in C2PMSG_101 */
                ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMPASP_SMN_C2PMSG_101),
                                   0x80000000, 0x8000FFFF, false);

        } else {
                /* Wait for sOS ready for ring creation */
                ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_64),
                                   0x80000000, 0x80000000, false);
                if (ret) {
                        DRM_ERROR("Failed to wait for trust OS ready for ring creation\n");
                        return ret;
                }

                /* Write low address of the ring to C2PMSG_69 */
                psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
                WREG32_SOC15(MP0, 0, regMPASP_PCRU1_MPASP_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, regMPASP_PCRU1_MPASP_C2PMSG_70, psp_ring_reg);
                /* Write size of ring to C2PMSG_71 */
                psp_ring_reg = ring->ring_size;
                WREG32_SOC15(MP0, 0, regMPASP_PCRU1_MPASP_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, regMPASP_PCRU1_MPASP_C2PMSG_64, psp_ring_reg);

                /* there might be handshake issue with hardware which needs delay */
                mdelay(20);

                /* Wait for response flag (bit 31) in C2PMSG_64 */
                ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_64),
                                   0x80000000, 0x8000FFFF, false);
        }

        return ret;
}

static int psp_v15_0_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_v15_0_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 uint32_t psp_v15_0_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, regMPASP_SMN_C2PMSG_102);
        else
                data = RREG32_SOC15(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_67);

        return data;
}

static void psp_v15_0_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, regMPASP_SMN_C2PMSG_102, value);
                WREG32_SOC15(MP0, 0, regMPASP_SMN_C2PMSG_101,
                             GFX_CTRL_CMD_ID_CONSUME_CMD);
        } else
                WREG32_SOC15(MP0, 0, regMPASP_PCRU1_MPASP_C2PMSG_67, value);
}

static const struct psp_funcs psp_v15_0_0_funcs = {
        .init_microcode = psp_v15_0_0_init_microcode,
        .ring_create = psp_v15_0_0_ring_create,
        .ring_stop = psp_v15_0_0_ring_stop,
        .ring_destroy = psp_v15_0_0_ring_destroy,
        .ring_get_wptr = psp_v15_0_0_ring_get_wptr,
        .ring_set_wptr = psp_v15_0_0_ring_set_wptr,
};

void psp_v15_0_0_set_psp_funcs(struct psp_context *psp)
{
        psp->funcs = &psp_v15_0_0_funcs;
}