/*	$NetBSD: amdgpu_jpeg.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $	*/

/*
 * Copyright 2019 Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: amdgpu_jpeg.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $");

#include "amdgpu.h"
#include "amdgpu_jpeg.h"
#include "amdgpu_pm.h"
#include "soc15d.h"
#include "soc15_common.h"

#define JPEG_IDLE_TIMEOUT	msecs_to_jiffies(1000)

static void amdgpu_jpeg_idle_work_handler(struct work_struct *work);

int amdgpu_jpeg_sw_init(struct amdgpu_device *adev)
{
	INIT_DELAYED_WORK(&adev->jpeg.idle_work, amdgpu_jpeg_idle_work_handler);

	return 0;
}

int amdgpu_jpeg_sw_fini(struct amdgpu_device *adev)
{
	int i;

	cancel_delayed_work_sync(&adev->jpeg.idle_work);

	for (i = 0; i < adev->jpeg.num_jpeg_inst; ++i) {
		if (adev->jpeg.harvest_config & (1 << i))
			continue;

		amdgpu_ring_fini(&adev->jpeg.inst[i].ring_dec);
	}

	return 0;
}

int amdgpu_jpeg_suspend(struct amdgpu_device *adev)
{
	cancel_delayed_work_sync(&adev->jpeg.idle_work);

	return 0;
}

int amdgpu_jpeg_resume(struct amdgpu_device *adev)
{
	return 0;
}

static void amdgpu_jpeg_idle_work_handler(struct work_struct *work)
{
	struct amdgpu_device *adev =
		container_of(work, struct amdgpu_device, jpeg.idle_work.work);
	unsigned int fences = 0;
	unsigned int i;

	for (i = 0; i < adev->jpeg.num_jpeg_inst; ++i) {
		if (adev->jpeg.harvest_config & (1 << i))
			continue;

		fences += amdgpu_fence_count_emitted(&adev->jpeg.inst[i].ring_dec);
	}

	if (fences == 0)
		amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_JPEG,
						       AMD_PG_STATE_GATE);
	else
		schedule_delayed_work(&adev->jpeg.idle_work, JPEG_IDLE_TIMEOUT);
}

void amdgpu_jpeg_ring_begin_use(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;
	bool set_clocks = !cancel_delayed_work_sync(&adev->jpeg.idle_work);

	if (set_clocks)
		amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_JPEG,
						       AMD_PG_STATE_UNGATE);
}

void amdgpu_jpeg_ring_end_use(struct amdgpu_ring *ring)
{
	schedule_delayed_work(&ring->adev->jpeg.idle_work, JPEG_IDLE_TIMEOUT);
}

int amdgpu_jpeg_dec_ring_test_ring(struct amdgpu_ring *ring)
{
	struct amdgpu_device *adev = ring->adev;
	uint32_t tmp = 0;
	unsigned i;
	int r;

	WREG32(adev->jpeg.inst[ring->me].external.jpeg_pitch, 0xCAFEDEAD);
	r = amdgpu_ring_alloc(ring, 3);
	if (r)
		return r;

	amdgpu_ring_write(ring, PACKET0(adev->jpeg.internal.jpeg_pitch, 0));
	amdgpu_ring_write(ring, 0xDEADBEEF);
	amdgpu_ring_commit(ring);

	for (i = 0; i < adev->usec_timeout; i++) {
		tmp = RREG32(adev->jpeg.inst[ring->me].external.jpeg_pitch);
		if (tmp == 0xDEADBEEF)
			break;
		udelay(1);
	}

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

	return r;
}

static int amdgpu_jpeg_dec_set_reg(struct amdgpu_ring *ring, uint32_t handle,
		struct dma_fence **fence)
{
	struct amdgpu_device *adev = ring->adev;
	struct amdgpu_job *job;
	struct amdgpu_ib *ib;
	struct dma_fence *f = NULL;
	const unsigned ib_size_dw = 16;
	int i, r;

	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4, &job);
	if (r)
		return r;

	ib = &job->ibs[0];

	ib->ptr[0] = PACKETJ(adev->jpeg.internal.jpeg_pitch, 0, 0, PACKETJ_TYPE0);
	ib->ptr[1] = 0xDEADBEEF;
	for (i = 2; i < 16; i += 2) {
		ib->ptr[i] = PACKETJ(0, 0, 0, PACKETJ_TYPE6);
		ib->ptr[i+1] = 0;
	}
	ib->length_dw = 16;

	r = amdgpu_job_submit_direct(job, ring, &f);
	if (r)
		goto err;

	if (fence)
		*fence = dma_fence_get(f);
	dma_fence_put(f);

	return 0;

err:
	amdgpu_job_free(job);
	return r;
}

int amdgpu_jpeg_dec_ring_test_ib(struct amdgpu_ring *ring, long timeout)
{
	struct amdgpu_device *adev = ring->adev;
	uint32_t tmp = 0;
	unsigned i;
	struct dma_fence *fence = NULL;
	long r = 0;

	r = amdgpu_jpeg_dec_set_reg(ring, 1, &fence);
	if (r)
		goto error;

	r = dma_fence_wait_timeout(fence, false, timeout);
	if (r == 0) {
		r = -ETIMEDOUT;
		goto error;
	} else if (r < 0) {
		goto error;
	} else {
		r = 0;
	}

	for (i = 0; i < adev->usec_timeout; i++) {
		tmp = RREG32(adev->jpeg.inst[ring->me].external.jpeg_pitch);
		if (tmp == 0xDEADBEEF)
			break;
		udelay(1);
	}

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

	dma_fence_put(fence);
error:
	return r;
}