/*
 * Copyright 2014-2018 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 "amdgpu_amdkfd.h"
#include "gc/gc_9_0_offset.h"
#include "gc/gc_9_0_sh_mask.h"
#include "vega10_enum.h"
#include "sdma0/sdma0_4_0_offset.h"
#include "sdma0/sdma0_4_0_sh_mask.h"
#include "sdma1/sdma1_4_0_offset.h"
#include "sdma1/sdma1_4_0_sh_mask.h"
#include "athub/athub_1_0_offset.h"
#include "athub/athub_1_0_sh_mask.h"
#include "oss/osssys_4_0_offset.h"
#include "oss/osssys_4_0_sh_mask.h"
#include "soc15_common.h"
#include "v9_structs.h"
#include "soc15.h"
#include "soc15d.h"
#include "gfx_v9_0.h"

enum hqd_dequeue_request_type {
        NO_ACTION = 0,
        DRAIN_PIPE,
        RESET_WAVES
};

static inline struct amdgpu_device *get_amdgpu_device(struct kgd_dev *kgd)
{
        return (struct amdgpu_device *)kgd;
}

static void lock_srbm(struct kgd_dev *kgd, uint32_t mec, uint32_t pipe,
                        uint32_t queue, uint32_t vmid)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        mutex_lock(&adev->srbm_mutex);
        soc15_grbm_select(adev, mec, pipe, queue, vmid);
}

static void unlock_srbm(struct kgd_dev *kgd)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        soc15_grbm_select(adev, 0, 0, 0, 0);
        mutex_unlock(&adev->srbm_mutex);
}

static void acquire_queue(struct kgd_dev *kgd, uint32_t pipe_id,
                                uint32_t queue_id)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        uint32_t mec = (pipe_id / adev->gfx.mec.num_pipe_per_mec) + 1;
        uint32_t pipe = (pipe_id % adev->gfx.mec.num_pipe_per_mec);

        lock_srbm(kgd, mec, pipe, queue_id, 0);
}

static uint64_t get_queue_mask(struct amdgpu_device *adev,
                               uint32_t pipe_id, uint32_t queue_id)
{
        unsigned int bit = pipe_id * adev->gfx.mec.num_queue_per_pipe +
                        queue_id;

        return 1ull << bit;
}

static void release_queue(struct kgd_dev *kgd)
{
        unlock_srbm(kgd);
}

void kgd_gfx_v9_program_sh_mem_settings(struct kgd_dev *kgd, uint32_t vmid,
                                        uint32_t sh_mem_config,
                                        uint32_t sh_mem_ape1_base,
                                        uint32_t sh_mem_ape1_limit,
                                        uint32_t sh_mem_bases)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        lock_srbm(kgd, 0, 0, 0, vmid);

        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmSH_MEM_CONFIG), sh_mem_config);
        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmSH_MEM_BASES), sh_mem_bases);
        /* APE1 no longer exists on GFX9 */

        unlock_srbm(kgd);
}

int kgd_gfx_v9_set_pasid_vmid_mapping(struct kgd_dev *kgd, u32 pasid,
                                        unsigned int vmid)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        /*
         * We have to assume that there is no outstanding mapping.
         * The ATC_VMID_PASID_MAPPING_UPDATE_STATUS bit could be 0 because
         * a mapping is in progress or because a mapping finished
         * and the SW cleared it.
         * So the protocol is to always wait & clear.
         */
        uint32_t pasid_mapping = (pasid == 0) ? 0 : (uint32_t)pasid |
                        ATC_VMID0_PASID_MAPPING__VALID_MASK;

        /*
         * need to do this twice, once for gfx and once for mmhub
         * for ATC add 16 to VMID for mmhub, for IH different registers.
         * ATC_VMID0..15 registers are separate from ATC_VMID16..31.
         */

        WREG32(SOC15_REG_OFFSET(ATHUB, 0, mmATC_VMID0_PASID_MAPPING) + vmid,
               pasid_mapping);

        while (!(RREG32(SOC15_REG_OFFSET(
                                ATHUB, 0,
                                mmATC_VMID_PASID_MAPPING_UPDATE_STATUS)) &
                 (1U << vmid)))
                cpu_relax();

        WREG32(SOC15_REG_OFFSET(ATHUB, 0,
                                mmATC_VMID_PASID_MAPPING_UPDATE_STATUS),
               1U << vmid);

        /* Mapping vmid to pasid also for IH block */
        WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_VMID_0_LUT) + vmid,
               pasid_mapping);

        WREG32(SOC15_REG_OFFSET(ATHUB, 0, mmATC_VMID16_PASID_MAPPING) + vmid,
               pasid_mapping);

        while (!(RREG32(SOC15_REG_OFFSET(
                                ATHUB, 0,
                                mmATC_VMID_PASID_MAPPING_UPDATE_STATUS)) &
                 (1U << (vmid + 16))))
                cpu_relax();

        WREG32(SOC15_REG_OFFSET(ATHUB, 0,
                                mmATC_VMID_PASID_MAPPING_UPDATE_STATUS),
               1U << (vmid + 16));

        /* Mapping vmid to pasid also for IH block */
        WREG32(SOC15_REG_OFFSET(OSSSYS, 0, mmIH_VMID_0_LUT_MM) + vmid,
               pasid_mapping);
        return 0;
}

/* TODO - RING0 form of field is obsolete, seems to date back to SI
 * but still works
 */

int kgd_gfx_v9_init_interrupts(struct kgd_dev *kgd, uint32_t pipe_id)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        uint32_t mec;
        uint32_t pipe;

        mec = (pipe_id / adev->gfx.mec.num_pipe_per_mec) + 1;
        pipe = (pipe_id % adev->gfx.mec.num_pipe_per_mec);

        lock_srbm(kgd, mec, pipe, 0, 0);

        WREG32(SOC15_REG_OFFSET(GC, 0, mmCPC_INT_CNTL),
                CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK |
                CP_INT_CNTL_RING0__OPCODE_ERROR_INT_ENABLE_MASK);

        unlock_srbm(kgd);

        return 0;
}

static uint32_t get_sdma_rlc_reg_offset(struct amdgpu_device *adev,
                                unsigned int engine_id,
                                unsigned int queue_id)
{
        uint32_t sdma_engine_reg_base = 0;
        uint32_t sdma_rlc_reg_offset;

        switch (engine_id) {
        default:
                dev_warn(adev->dev,
                         "Invalid sdma engine id (%d), using engine id 0\n",
                         engine_id);
                fallthrough;
        case 0:
                sdma_engine_reg_base = SOC15_REG_OFFSET(SDMA0, 0,
                                mmSDMA0_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL;
                break;
        case 1:
                sdma_engine_reg_base = SOC15_REG_OFFSET(SDMA1, 0,
                                mmSDMA1_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL;
                break;
        }

        sdma_rlc_reg_offset = sdma_engine_reg_base
                + queue_id * (mmSDMA0_RLC1_RB_CNTL - mmSDMA0_RLC0_RB_CNTL);

        pr_debug("RLC register offset for SDMA%d RLC%d: 0x%x\n", engine_id,
                 queue_id, sdma_rlc_reg_offset);

        return sdma_rlc_reg_offset;
}

static inline struct v9_mqd *get_mqd(void *mqd)
{
        return (struct v9_mqd *)mqd;
}

static inline struct v9_sdma_mqd *get_sdma_mqd(void *mqd)
{
        return (struct v9_sdma_mqd *)mqd;
}

int kgd_gfx_v9_hqd_load(struct kgd_dev *kgd, void *mqd, uint32_t pipe_id,
                        uint32_t queue_id, uint32_t __user *wptr,
                        uint32_t wptr_shift, uint32_t wptr_mask,
                        struct mm_struct *mm)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        struct v9_mqd *m;
        uint32_t *mqd_hqd;
        uint32_t reg, hqd_base, data;

        m = get_mqd(mqd);

        acquire_queue(kgd, pipe_id, queue_id);

        /* HQD registers extend from CP_MQD_BASE_ADDR to CP_HQD_EOP_WPTR_MEM. */
        mqd_hqd = &m->cp_mqd_base_addr_lo;
        hqd_base = SOC15_REG_OFFSET(GC, 0, mmCP_MQD_BASE_ADDR);

        for (reg = hqd_base;
             reg <= SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_HI); reg++)
                WREG32_RLC(reg, mqd_hqd[reg - hqd_base]);


        /* Activate doorbell logic before triggering WPTR poll. */
        data = REG_SET_FIELD(m->cp_hqd_pq_doorbell_control,
                             CP_HQD_PQ_DOORBELL_CONTROL, DOORBELL_EN, 1);
        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL), data);

        if (wptr) {
                /* Don't read wptr with get_user because the user
                 * context may not be accessible (if this function
                 * runs in a work queue). Instead trigger a one-shot
                 * polling read from memory in the CP. This assumes
                 * that wptr is GPU-accessible in the queue's VMID via
                 * ATC or SVM. WPTR==RPTR before starting the poll so
                 * the CP starts fetching new commands from the right
                 * place.
                 *
                 * Guessing a 64-bit WPTR from a 32-bit RPTR is a bit
                 * tricky. Assume that the queue didn't overflow. The
                 * number of valid bits in the 32-bit RPTR depends on
                 * the queue size. The remaining bits are taken from
                 * the saved 64-bit WPTR. If the WPTR wrapped, add the
                 * queue size.
                 */
                uint32_t queue_size =
                        2 << REG_GET_FIELD(m->cp_hqd_pq_control,
                                           CP_HQD_PQ_CONTROL, QUEUE_SIZE);
                uint64_t guessed_wptr = m->cp_hqd_pq_rptr & (queue_size - 1);

                if ((m->cp_hqd_pq_wptr_lo & (queue_size - 1)) < guessed_wptr)
                        guessed_wptr += queue_size;
                guessed_wptr += m->cp_hqd_pq_wptr_lo & ~(queue_size - 1);
                guessed_wptr += (uint64_t)m->cp_hqd_pq_wptr_hi << 32;

                WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_LO),
                       lower_32_bits(guessed_wptr));
                WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_HI),
                       upper_32_bits(guessed_wptr));
                WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_POLL_ADDR),
                       lower_32_bits((uintptr_t)wptr));
                WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_POLL_ADDR_HI),
                       upper_32_bits((uintptr_t)wptr));
                WREG32(SOC15_REG_OFFSET(GC, 0, mmCP_PQ_WPTR_POLL_CNTL1),
                       (uint32_t)get_queue_mask(adev, pipe_id, queue_id));
        }

        /* Start the EOP fetcher */
        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_EOP_RPTR),
               REG_SET_FIELD(m->cp_hqd_eop_rptr,
                             CP_HQD_EOP_RPTR, INIT_FETCHER, 1));

        data = REG_SET_FIELD(m->cp_hqd_active, CP_HQD_ACTIVE, ACTIVE, 1);
        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_ACTIVE), data);

        release_queue(kgd);

        return 0;
}

int kgd_gfx_v9_hiq_mqd_load(struct kgd_dev *kgd, void *mqd,
                            uint32_t pipe_id, uint32_t queue_id,
                            uint32_t doorbell_off)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        struct amdgpu_ring *kiq_ring = &adev->gfx.kiq.ring;
        struct v9_mqd *m;
        uint32_t mec, pipe;
        int r;

        m = get_mqd(mqd);

        acquire_queue(kgd, pipe_id, queue_id);

        mec = (pipe_id / adev->gfx.mec.num_pipe_per_mec) + 1;
        pipe = (pipe_id % adev->gfx.mec.num_pipe_per_mec);

        pr_debug("kfd: set HIQ, mec:%d, pipe:%d, queue:%d.\n",
                 mec, pipe, queue_id);

        spin_lock(&adev->gfx.kiq.ring_lock);
        r = amdgpu_ring_alloc(kiq_ring, 7);
        if (r) {
                pr_err("Failed to alloc KIQ (%d).\n", r);
                goto out_unlock;
        }

        amdgpu_ring_write(kiq_ring, PACKET3(PACKET3_MAP_QUEUES, 5));
        amdgpu_ring_write(kiq_ring,
                          PACKET3_MAP_QUEUES_QUEUE_SEL(0) | /* Queue_Sel */
                          PACKET3_MAP_QUEUES_VMID(m->cp_hqd_vmid) | /* VMID */
                          PACKET3_MAP_QUEUES_QUEUE(queue_id) |
                          PACKET3_MAP_QUEUES_PIPE(pipe) |
                          PACKET3_MAP_QUEUES_ME((mec - 1)) |
                          PACKET3_MAP_QUEUES_QUEUE_TYPE(0) | /*queue_type: normal compute queue */
                          PACKET3_MAP_QUEUES_ALLOC_FORMAT(0) | /* alloc format: all_on_one_pipe */
                          PACKET3_MAP_QUEUES_ENGINE_SEL(1) | /* engine_sel: hiq */
                          PACKET3_MAP_QUEUES_NUM_QUEUES(1)); /* num_queues: must be 1 */
        amdgpu_ring_write(kiq_ring,
                          PACKET3_MAP_QUEUES_DOORBELL_OFFSET(doorbell_off));
        amdgpu_ring_write(kiq_ring, m->cp_mqd_base_addr_lo);
        amdgpu_ring_write(kiq_ring, m->cp_mqd_base_addr_hi);
        amdgpu_ring_write(kiq_ring, m->cp_hqd_pq_wptr_poll_addr_lo);
        amdgpu_ring_write(kiq_ring, m->cp_hqd_pq_wptr_poll_addr_hi);
        amdgpu_ring_commit(kiq_ring);

out_unlock:
        spin_unlock(&adev->gfx.kiq.ring_lock);
        release_queue(kgd);

        return r;
}

int kgd_gfx_v9_hqd_dump(struct kgd_dev *kgd,
                        uint32_t pipe_id, uint32_t queue_id,
                        uint32_t (**dump)[2], uint32_t *n_regs)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        uint32_t i = 0, reg;
#define HQD_N_REGS 56
#define DUMP_REG(addr) do {                             \
                if (WARN_ON_ONCE(i >= HQD_N_REGS))      \
                        break;                          \
                (*dump)[i][0] = (addr) << 2;            \
                (*dump)[i++][1] = RREG32(addr);         \
        } while (0)

        *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
        if (*dump == NULL)
                return -ENOMEM;

        acquire_queue(kgd, pipe_id, queue_id);

        for (reg = SOC15_REG_OFFSET(GC, 0, mmCP_MQD_BASE_ADDR);
             reg <= SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_WPTR_HI); reg++)
                DUMP_REG(reg);

        release_queue(kgd);

        WARN_ON_ONCE(i != HQD_N_REGS);
        *n_regs = i;

        return 0;
}

static int kgd_hqd_sdma_load(struct kgd_dev *kgd, void *mqd,
                             uint32_t __user *wptr, struct mm_struct *mm)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        struct v9_sdma_mqd *m;
        uint32_t sdma_rlc_reg_offset;
        unsigned long end_jiffies;
        uint32_t data;
        uint64_t data64;
        uint64_t __user *wptr64 = (uint64_t __user *)wptr;

        m = get_sdma_mqd(mqd);
        sdma_rlc_reg_offset = get_sdma_rlc_reg_offset(adev, m->sdma_engine_id,
                                            m->sdma_queue_id);

        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL,
                m->sdmax_rlcx_rb_cntl & (~SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK));

        end_jiffies = msecs_to_jiffies(2000) + jiffies;
        while (true) {
                data = RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_CONTEXT_STATUS);
                if (data & SDMA0_RLC0_CONTEXT_STATUS__IDLE_MASK)
                        break;
                if (time_after(jiffies, end_jiffies)) {
                        pr_err("SDMA RLC not idle in %s\n", __func__);
                        return -ETIME;
                }
                usleep_range(500, 1000);
        }

        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_DOORBELL_OFFSET,
               m->sdmax_rlcx_doorbell_offset);

        data = REG_SET_FIELD(m->sdmax_rlcx_doorbell, SDMA0_RLC0_DOORBELL,
                             ENABLE, 1);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_DOORBELL, data);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR,
                                m->sdmax_rlcx_rb_rptr);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_HI,
                                m->sdmax_rlcx_rb_rptr_hi);

        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_MINOR_PTR_UPDATE, 1);
        if (read_user_wptr(mm, wptr64, data64)) {
                WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR,
                       lower_32_bits(data64));
                WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR_HI,
                       upper_32_bits(data64));
        } else {
                WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR,
                       m->sdmax_rlcx_rb_rptr);
                WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR_HI,
                       m->sdmax_rlcx_rb_rptr_hi);
        }
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_MINOR_PTR_UPDATE, 0);

        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_BASE, m->sdmax_rlcx_rb_base);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_BASE_HI,
                        m->sdmax_rlcx_rb_base_hi);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_ADDR_LO,
                        m->sdmax_rlcx_rb_rptr_addr_lo);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_ADDR_HI,
                        m->sdmax_rlcx_rb_rptr_addr_hi);

        data = REG_SET_FIELD(m->sdmax_rlcx_rb_cntl, SDMA0_RLC0_RB_CNTL,
                             RB_ENABLE, 1);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL, data);

        return 0;
}

static int kgd_hqd_sdma_dump(struct kgd_dev *kgd,
                             uint32_t engine_id, uint32_t queue_id,
                             uint32_t (**dump)[2], uint32_t *n_regs)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        uint32_t sdma_rlc_reg_offset = get_sdma_rlc_reg_offset(adev,
                        engine_id, queue_id);
        uint32_t i = 0, reg;
#undef HQD_N_REGS
#define HQD_N_REGS (19+6+7+10)

        *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
        if (*dump == NULL)
                return -ENOMEM;

        for (reg = mmSDMA0_RLC0_RB_CNTL; reg <= mmSDMA0_RLC0_DOORBELL; reg++)
                DUMP_REG(sdma_rlc_reg_offset + reg);
        for (reg = mmSDMA0_RLC0_STATUS; reg <= mmSDMA0_RLC0_CSA_ADDR_HI; reg++)
                DUMP_REG(sdma_rlc_reg_offset + reg);
        for (reg = mmSDMA0_RLC0_IB_SUB_REMAIN;
             reg <= mmSDMA0_RLC0_MINOR_PTR_UPDATE; reg++)
                DUMP_REG(sdma_rlc_reg_offset + reg);
        for (reg = mmSDMA0_RLC0_MIDCMD_DATA0;
             reg <= mmSDMA0_RLC0_MIDCMD_CNTL; reg++)
                DUMP_REG(sdma_rlc_reg_offset + reg);

        WARN_ON_ONCE(i != HQD_N_REGS);
        *n_regs = i;

        return 0;
}

bool kgd_gfx_v9_hqd_is_occupied(struct kgd_dev *kgd, uint64_t queue_address,
                                uint32_t pipe_id, uint32_t queue_id)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        uint32_t act;
        bool retval = false;
        uint32_t low, high;

        acquire_queue(kgd, pipe_id, queue_id);
        act = RREG32(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_ACTIVE));
        if (act) {
                low = lower_32_bits(queue_address >> 8);
                high = upper_32_bits(queue_address >> 8);

                if (low == RREG32(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_BASE)) &&
                   high == RREG32(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_PQ_BASE_HI)))
                        retval = true;
        }
        release_queue(kgd);
        return retval;
}

static bool kgd_hqd_sdma_is_occupied(struct kgd_dev *kgd, void *mqd)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        struct v9_sdma_mqd *m;
        uint32_t sdma_rlc_reg_offset;
        uint32_t sdma_rlc_rb_cntl;

        m = get_sdma_mqd(mqd);
        sdma_rlc_reg_offset = get_sdma_rlc_reg_offset(adev, m->sdma_engine_id,
                                            m->sdma_queue_id);

        sdma_rlc_rb_cntl = RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL);

        if (sdma_rlc_rb_cntl & SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK)
                return true;

        return false;
}

int kgd_gfx_v9_hqd_destroy(struct kgd_dev *kgd, void *mqd,
                                enum kfd_preempt_type reset_type,
                                unsigned int utimeout, uint32_t pipe_id,
                                uint32_t queue_id)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        enum hqd_dequeue_request_type type;
        unsigned long end_jiffies;
        uint32_t temp;
        struct v9_mqd *m = get_mqd(mqd);

        if (amdgpu_in_reset(adev))
                return -EIO;

        acquire_queue(kgd, pipe_id, queue_id);

        if (m->cp_hqd_vmid == 0)
                WREG32_FIELD15_RLC(GC, 0, RLC_CP_SCHEDULERS, scheduler1, 0);

        switch (reset_type) {
        case KFD_PREEMPT_TYPE_WAVEFRONT_DRAIN:
                type = DRAIN_PIPE;
                break;
        case KFD_PREEMPT_TYPE_WAVEFRONT_RESET:
                type = RESET_WAVES;
                break;
        default:
                type = DRAIN_PIPE;
                break;
        }

        WREG32_RLC(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_DEQUEUE_REQUEST), type);

        end_jiffies = (utimeout * HZ / 1000) + jiffies;
        while (true) {
                temp = RREG32(SOC15_REG_OFFSET(GC, 0, mmCP_HQD_ACTIVE));
                if (!(temp & CP_HQD_ACTIVE__ACTIVE_MASK))
                        break;
                if (time_after(jiffies, end_jiffies)) {
                        pr_err("cp queue preemption time out.\n");
                        release_queue(kgd);
                        return -ETIME;
                }
                usleep_range(500, 1000);
        }

        release_queue(kgd);
        return 0;
}

static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
                                unsigned int utimeout)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        struct v9_sdma_mqd *m;
        uint32_t sdma_rlc_reg_offset;
        uint32_t temp;
        unsigned long end_jiffies = (utimeout * HZ / 1000) + jiffies;

        m = get_sdma_mqd(mqd);
        sdma_rlc_reg_offset = get_sdma_rlc_reg_offset(adev, m->sdma_engine_id,
                                            m->sdma_queue_id);

        temp = RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL);
        temp = temp & ~SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK;
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL, temp);

        while (true) {
                temp = RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_CONTEXT_STATUS);
                if (temp & SDMA0_RLC0_CONTEXT_STATUS__IDLE_MASK)
                        break;
                if (time_after(jiffies, end_jiffies)) {
                        pr_err("SDMA RLC not idle in %s\n", __func__);
                        return -ETIME;
                }
                usleep_range(500, 1000);
        }

        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_DOORBELL, 0);
        WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL,
                RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL) |
                SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK);

        m->sdmax_rlcx_rb_rptr = RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR);
        m->sdmax_rlcx_rb_rptr_hi =
                RREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_HI);

        return 0;
}

bool kgd_gfx_v9_get_atc_vmid_pasid_mapping_info(struct kgd_dev *kgd,
                                        uint8_t vmid, uint16_t *p_pasid)
{
        uint32_t value;
        struct amdgpu_device *adev = (struct amdgpu_device *) kgd;

        value = RREG32(SOC15_REG_OFFSET(ATHUB, 0, mmATC_VMID0_PASID_MAPPING)
                     + vmid);
        *p_pasid = value & ATC_VMID0_PASID_MAPPING__PASID_MASK;

        return !!(value & ATC_VMID0_PASID_MAPPING__VALID_MASK);
}

int kgd_gfx_v9_address_watch_disable(struct kgd_dev *kgd)
{
        return 0;
}

int kgd_gfx_v9_address_watch_execute(struct kgd_dev *kgd,
                                        unsigned int watch_point_id,
                                        uint32_t cntl_val,
                                        uint32_t addr_hi,
                                        uint32_t addr_lo)
{
        return 0;
}

int kgd_gfx_v9_wave_control_execute(struct kgd_dev *kgd,
                                        uint32_t gfx_index_val,
                                        uint32_t sq_cmd)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);
        uint32_t data = 0;

        mutex_lock(&adev->grbm_idx_mutex);

        WREG32_SOC15_RLC_SHADOW(GC, 0, mmGRBM_GFX_INDEX, gfx_index_val);
        WREG32(SOC15_REG_OFFSET(GC, 0, mmSQ_CMD), sq_cmd);

        data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
                INSTANCE_BROADCAST_WRITES, 1);
        data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
                SH_BROADCAST_WRITES, 1);
        data = REG_SET_FIELD(data, GRBM_GFX_INDEX,
                SE_BROADCAST_WRITES, 1);

        WREG32_SOC15_RLC_SHADOW(GC, 0, mmGRBM_GFX_INDEX, data);
        mutex_unlock(&adev->grbm_idx_mutex);

        return 0;
}

uint32_t kgd_gfx_v9_address_watch_get_offset(struct kgd_dev *kgd,
                                        unsigned int watch_point_id,
                                        unsigned int reg_offset)
{
        return 0;
}

void kgd_gfx_v9_set_vm_context_page_table_base(struct kgd_dev *kgd,
                        uint32_t vmid, uint64_t page_table_base)
{
        struct amdgpu_device *adev = get_amdgpu_device(kgd);

        if (!amdgpu_amdkfd_is_kfd_vmid(adev, vmid)) {
                pr_err("trying to set page table base for wrong VMID %u\n",
                       vmid);
                return;
        }

        adev->mmhub.funcs->setup_vm_pt_regs(adev, vmid, page_table_base);

        adev->gfxhub.funcs->setup_vm_pt_regs(adev, vmid, page_table_base);
}

static void lock_spi_csq_mutexes(struct amdgpu_device *adev)
{
        mutex_lock(&adev->srbm_mutex);
        mutex_lock(&adev->grbm_idx_mutex);

}

static void unlock_spi_csq_mutexes(struct amdgpu_device *adev)
{
        mutex_unlock(&adev->grbm_idx_mutex);
        mutex_unlock(&adev->srbm_mutex);
}

/**
 * @get_wave_count: Read device registers to get number of waves in flight for
 * a particular queue. The method also returns the VMID associated with the
 * queue.
 *
 * @adev: Handle of device whose registers are to be read
 * @queue_idx: Index of queue in the queue-map bit-field
 * @wave_cnt: Output parameter updated with number of waves in flight
 * @vmid: Output parameter updated with VMID of queue whose wave count
 * is being collected
 */
static void get_wave_count(struct amdgpu_device *adev, int queue_idx,
                int *wave_cnt, int *vmid)
{
        int pipe_idx;
        int queue_slot;
        unsigned int reg_val;

        /*
         * Program GRBM with appropriate MEID, PIPEID, QUEUEID and VMID
         * parameters to read out waves in flight. Get VMID if there are
         * non-zero waves in flight.
         */
        *vmid = 0xFF;
        *wave_cnt = 0;
        pipe_idx = queue_idx / adev->gfx.mec.num_queue_per_pipe;
        queue_slot = queue_idx % adev->gfx.mec.num_queue_per_pipe;
        soc15_grbm_select(adev, 1, pipe_idx, queue_slot, 0);
        reg_val = RREG32(SOC15_REG_OFFSET(GC, 0, mmSPI_CSQ_WF_ACTIVE_COUNT_0) +
                         queue_slot);
        *wave_cnt = reg_val & SPI_CSQ_WF_ACTIVE_COUNT_0__COUNT_MASK;
        if (*wave_cnt != 0)
                *vmid = (RREG32_SOC15(GC, 0, mmCP_HQD_VMID) &
                         CP_HQD_VMID__VMID_MASK) >> CP_HQD_VMID__VMID__SHIFT;
}

/**
 * @kgd_gfx_v9_get_cu_occupancy: Reads relevant registers associated with each
 * shader engine and aggregates the number of waves that are in flight for the
 * process whose pasid is provided as a parameter. The process could have ZERO
 * or more queues running and submitting waves to compute units.
 *
 * @kgd: Handle of device from which to get number of waves in flight
 * @pasid: Identifies the process for which this query call is invoked
 * @wave_cnt: Output parameter updated with number of waves in flight that
 * belong to process with given pasid
 * @max_waves_per_cu: Output parameter updated with maximum number of waves
 * possible per Compute Unit
 *
 * @note: It's possible that the device has too many queues (oversubscription)
 * in which case a VMID could be remapped to a different PASID. This could lead
 * to an iaccurate wave count. Following is a high-level sequence:
 *    Time T1: vmid = getVmid(); vmid is associated with Pasid P1
 *    Time T2: passId = getPasId(vmid); vmid is associated with Pasid P2
 * In the sequence above wave count obtained from time T1 will be incorrectly
 * lost or added to total wave count.
 *
 * The registers that provide the waves in flight are:
 *
 *  SPI_CSQ_WF_ACTIVE_STATUS - bit-map of queues per pipe. The bit is ON if a
 *  queue is slotted, OFF if there is no queue. A process could have ZERO or
 *  more queues slotted and submitting waves to be run on compute units. Even
 *  when there is a queue it is possible there could be zero wave fronts, this
 *  can happen when queue is waiting on top-of-pipe events - e.g. waitRegMem
 *  command
 *
 *  For each bit that is ON from above:
 *
 *    Read (SPI_CSQ_WF_ACTIVE_COUNT_0 + queue_idx) register. It provides the
 *    number of waves that are in flight for the queue at specified index. The
 *    index ranges from 0 to 7.
 *
 *    If non-zero waves are in flight, read CP_HQD_VMID register to obtain VMID
 *    of the wave(s).
 *
 *    Determine if VMID from above step maps to pasid provided as parameter. If
 *    it matches agrregate the wave count. That the VMID will not match pasid is
 *    a normal condition i.e. a device is expected to support multiple queues
 *    from multiple proceses.
 *
 *  Reading registers referenced above involves programming GRBM appropriately
 */
static void kgd_gfx_v9_get_cu_occupancy(struct kgd_dev *kgd, int pasid,
                int *pasid_wave_cnt, int *max_waves_per_cu)
{
        int qidx;
        int vmid;
        int se_idx;
        int sh_idx;
        int se_cnt;
        int sh_cnt;
        int wave_cnt;
        int queue_map;
        int pasid_tmp;
        int max_queue_cnt;
        int vmid_wave_cnt = 0;
        struct amdgpu_device *adev;
        DECLARE_BITMAP(cp_queue_bitmap, KGD_MAX_QUEUES);

        adev = get_amdgpu_device(kgd);
        lock_spi_csq_mutexes(adev);
        soc15_grbm_select(adev, 1, 0, 0, 0);

        /*
         * Iterate through the shader engines and arrays of the device
         * to get number of waves in flight
         */
        bitmap_complement(cp_queue_bitmap, adev->gfx.mec.queue_bitmap,
                          KGD_MAX_QUEUES);
        max_queue_cnt = adev->gfx.mec.num_pipe_per_mec *
                        adev->gfx.mec.num_queue_per_pipe;
        sh_cnt = adev->gfx.config.max_sh_per_se;
        se_cnt = adev->gfx.config.max_shader_engines;
        for (se_idx = 0; se_idx < se_cnt; se_idx++) {
                for (sh_idx = 0; sh_idx < sh_cnt; sh_idx++) {

                        gfx_v9_0_select_se_sh(adev, se_idx, sh_idx, 0xffffffff);
                        queue_map = RREG32(SOC15_REG_OFFSET(GC, 0,
                                           mmSPI_CSQ_WF_ACTIVE_STATUS));

                        /*
                         * Assumption: queue map encodes following schema: four
                         * pipes per each micro-engine, with each pipe mapping
                         * eight queues. This schema is true for GFX9 devices
                         * and must be verified for newer device families
                         */
                        for (qidx = 0; qidx < max_queue_cnt; qidx++) {

                                /* Skip qeueus that are not associated with
                                 * compute functions
                                 */
                                if (!test_bit(qidx, cp_queue_bitmap))
                                        continue;

                                if (!(queue_map & (1 << qidx)))
                                        continue;

                                /* Get number of waves in flight and aggregate them */
                                get_wave_count(adev, qidx, &wave_cnt, &vmid);
                                if (wave_cnt != 0) {
                                        pasid_tmp =
                                          RREG32(SOC15_REG_OFFSET(OSSSYS, 0,
                                                 mmIH_VMID_0_LUT) + vmid);
                                        if (pasid_tmp == pasid)
                                                vmid_wave_cnt += wave_cnt;
                                }
                        }
                }
        }

        gfx_v9_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
        soc15_grbm_select(adev, 0, 0, 0, 0);
        unlock_spi_csq_mutexes(adev);

        /* Update the output parameters and return */
        *pasid_wave_cnt = vmid_wave_cnt;
        *max_waves_per_cu = adev->gfx.cu_info.simd_per_cu *
                                adev->gfx.cu_info.max_waves_per_simd;
}

const struct kfd2kgd_calls gfx_v9_kfd2kgd = {
        .program_sh_mem_settings = kgd_gfx_v9_program_sh_mem_settings,
        .set_pasid_vmid_mapping = kgd_gfx_v9_set_pasid_vmid_mapping,
        .init_interrupts = kgd_gfx_v9_init_interrupts,
        .hqd_load = kgd_gfx_v9_hqd_load,
        .hiq_mqd_load = kgd_gfx_v9_hiq_mqd_load,
        .hqd_sdma_load = kgd_hqd_sdma_load,
        .hqd_dump = kgd_gfx_v9_hqd_dump,
        .hqd_sdma_dump = kgd_hqd_sdma_dump,
        .hqd_is_occupied = kgd_gfx_v9_hqd_is_occupied,
        .hqd_sdma_is_occupied = kgd_hqd_sdma_is_occupied,
        .hqd_destroy = kgd_gfx_v9_hqd_destroy,
        .hqd_sdma_destroy = kgd_hqd_sdma_destroy,
        .address_watch_disable = kgd_gfx_v9_address_watch_disable,
        .address_watch_execute = kgd_gfx_v9_address_watch_execute,
        .wave_control_execute = kgd_gfx_v9_wave_control_execute,
        .address_watch_get_offset = kgd_gfx_v9_address_watch_get_offset,
        .get_atc_vmid_pasid_mapping_info =
                        kgd_gfx_v9_get_atc_vmid_pasid_mapping_info,
        .set_vm_context_page_table_base = kgd_gfx_v9_set_vm_context_page_table_base,
        .get_cu_occupancy = kgd_gfx_v9_get_cu_occupancy,
};