xref: /openbmc/linux/drivers/gpu/drm/nouveau/nvkm/subdev/vfn/tu102.c (revision e6507380)

/*
 * Copyright 2021 Red Hat 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 "priv.h"

#include <nvif/class.h>

static void
tu102_vfn_intr_reset(struct nvkm_intr *intr, int leaf, u32 mask)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);

	nvkm_wr32(vfn->subdev.device, vfn->addr.priv + 0x1000 + (leaf * 4), mask);
}

static void
tu102_vfn_intr_allow(struct nvkm_intr *intr, int leaf, u32 mask)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);

	nvkm_wr32(vfn->subdev.device, vfn->addr.priv + 0x1200 + (leaf * 4), mask);
}

static void
tu102_vfn_intr_block(struct nvkm_intr *intr, int leaf, u32 mask)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);

	nvkm_wr32(vfn->subdev.device, vfn->addr.priv + 0x1400 + (leaf * 4), mask);
}

static void
tu102_vfn_intr_rearm(struct nvkm_intr *intr)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);

	nvkm_wr32(vfn->subdev.device, vfn->addr.priv + 0x1608, 0x0000000f);
}

static void
tu102_vfn_intr_unarm(struct nvkm_intr *intr)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);

	nvkm_wr32(vfn->subdev.device, vfn->addr.priv + 0x1610, 0x0000000f);
}

static bool
tu102_vfn_intr_pending(struct nvkm_intr *intr)
{
	struct nvkm_vfn *vfn = container_of(intr, typeof(*vfn), intr);
	struct nvkm_device *device = vfn->subdev.device;
	u32 intr_top = nvkm_rd32(device, vfn->addr.priv + 0x1600);
	int pending = 0, leaf;

	for (leaf = 0; leaf < 8; leaf++) {
		if (intr_top & BIT(leaf / 2)) {
			intr->stat[leaf] = nvkm_rd32(device, vfn->addr.priv + 0x1000 + (leaf * 4));
			if (intr->stat[leaf])
				pending++;
		} else {
			intr->stat[leaf] = 0;
		}
	}

	return pending != 0;
}

const struct nvkm_intr_func
tu102_vfn_intr = {
	.pending = tu102_vfn_intr_pending,
	.unarm = tu102_vfn_intr_unarm,
	.rearm = tu102_vfn_intr_rearm,
	.block = tu102_vfn_intr_block,
	.allow = tu102_vfn_intr_allow,
	.reset = tu102_vfn_intr_reset,
};

static const struct nvkm_vfn_func
tu102_vfn = {
	.intr = &tu102_vfn_intr,
	.user = { 0x030000, 0x010000, { -1, -1, TURING_USERMODE_A } },
};

int
tu102_vfn_new(struct nvkm_device *device,
	      enum nvkm_subdev_type type, int inst, struct nvkm_vfn **pvfn)
{
	return nvkm_vfn_new_(&tu102_vfn, device, type, inst, 0xb80000, pvfn);
}