xref: /openbmc/linux/drivers/gpu/drm/nouveau/nvkm/falcon/v1.c (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)

/*
 * Copyright (c) 2016, NVIDIA CORPORATION. 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, 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 AUTHORS OR COPYRIGHT HOLDERS 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 "priv.h"

#include <core/gpuobj.h>
#include <core/memory.h>
#include <subdev/timer.h>

void
nvkm_falcon_v1_load_imem(struct nvkm_falcon *falcon, void *data, u32 start,
			 u32 size, u16 tag, u8 port, bool secure)
{
	u8 rem = size % 4;
	u32 reg;
	int i;

	size -= rem;

	reg = start | BIT(24) | (secure ? BIT(28) : 0);
	nvkm_falcon_wr32(falcon, 0x180 + (port * 16), reg);
	for (i = 0; i < size / 4; i++) {
		/* write new tag every 256B */
		if ((i & 0x3f) == 0)
			nvkm_falcon_wr32(falcon, 0x188 + (port * 16), tag++);
		nvkm_falcon_wr32(falcon, 0x184 + (port * 16), ((u32 *)data)[i]);
	}

	/*
	 * If size is not a multiple of 4, mask the last work to ensure garbage
	 * does not get written
	 */
	if (rem) {
		u32 extra = ((u32 *)data)[i];

		/* write new tag every 256B */
		if ((i & 0x3f) == 0)
			nvkm_falcon_wr32(falcon, 0x188 + (port * 16), tag++);
		nvkm_falcon_wr32(falcon, 0x184 + (port * 16),
				 extra & (BIT(rem * 8) - 1));
		++i;
	}

	/* code must be padded to 0x40 words */
	for (; i & 0x3f; i++)
		nvkm_falcon_wr32(falcon, 0x184 + (port * 16), 0);
}

void
nvkm_falcon_v1_load_dmem(struct nvkm_falcon *falcon, void *data, u32 start,
			 u32 size, u8 port)
{
	u8 rem = size % 4;
	int i;

	size -= rem;

	nvkm_falcon_wr32(falcon, 0x1c0 + (port * 8), start | (0x1 << 24));
	for (i = 0; i < size / 4; i++)
		nvkm_falcon_wr32(falcon, 0x1c4 + (port * 8), ((u32 *)data)[i]);

	/*
	 * If size is not a multiple of 4, mask the last word to ensure garbage
	 * does not get written
	 */
	if (rem) {
		u32 extra = ((u32 *)data)[i];

		nvkm_falcon_wr32(falcon, 0x1c4 + (port * 8),
				 extra & (BIT(rem * 8) - 1));
	}
}

void
nvkm_falcon_v1_start(struct nvkm_falcon *falcon)
{
	u32 reg = nvkm_falcon_rd32(falcon, 0x100);

	if (reg & BIT(6))
		nvkm_falcon_wr32(falcon, 0x130, 0x2);
	else
		nvkm_falcon_wr32(falcon, 0x100, 0x2);
}