hwsq.c

  1/*
  2 * Copyright 2013 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs <bskeggs@redhat.com>
 23 */
 24#include "priv.h"
 25
 26struct nvkm_hwsq {
 27	struct nvkm_subdev *subdev;
 28	u32 addr;
 29	u32 data;
 30	struct {
 31		u8 data[512];
 32		u16 size;
 33	} c;
 34};
 35
 36static void
 37hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[])
 38{
 39	memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0]));
 40	hwsq->c.size += size;
 41}
 42
 43int
 44nvkm_hwsq_init(struct nvkm_subdev *subdev, struct nvkm_hwsq **phwsq)
 45{
 46	struct nvkm_hwsq *hwsq;
 47
 48	hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL);
 49	if (hwsq) {
 50		hwsq->subdev = subdev;
 51		hwsq->addr = ~0;
 52		hwsq->data = ~0;
 53		memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data));
 54		hwsq->c.size = 0;
 55	}
 56
 57	return hwsq ? 0 : -ENOMEM;
 58}
 59
 60int
 61nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
 62{
 63	struct nvkm_hwsq *hwsq = *phwsq;
 64	int ret = 0, i;
 65	if (hwsq) {
 66		struct nvkm_subdev *subdev = hwsq->subdev;
 67		struct nvkm_bus *bus = subdev->device->bus;
 68		hwsq->c.size = (hwsq->c.size + 4) / 4;
 69		if (hwsq->c.size <= bus->func->hwsq_size) {
 70			if (exec)
 71				ret = bus->func->hwsq_exec(bus,
 72							   (u32 *)hwsq->c.data,
 73								  hwsq->c.size);
 74			if (ret)
 75				nvkm_error(subdev, "hwsq exec failed: %d\n", ret);
 76		} else {
 77			nvkm_error(subdev, "hwsq ucode too large\n");
 78			ret = -ENOSPC;
 79		}
 80
 81		for (i = 0; ret && i < hwsq->c.size; i++)
 82			nvkm_error(subdev, "\t%08x\n", ((u32 *)hwsq->c.data)[i]);
 83
 84		*phwsq = NULL;
 85		kfree(hwsq);
 86	}
 87	return ret;
 88}
 89
 90void
 91nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
 92{
 93	nvkm_debug(hwsq->subdev, "R[%06x] = %08x\n", addr, data);
 94
 95	if (hwsq->data != data) {
 96		if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) {
 97			hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8,
 98						  data >> 16, data >> 24 });
 99		} else {
100			hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 });
101		}
102	}
103
104	if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) {
105		hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8,
106					  addr >> 16, addr >> 24 });
107	} else {
108		hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 });
109	}
110
111	hwsq->addr = addr;
112	hwsq->data = data;
113}
114
115void
116nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
117{
118	nvkm_debug(hwsq->subdev, " FLAG[%02x] = %d\n", flag, data);
119	flag += 0x80;
120	if (data >= 0)
121		flag += 0x20;
122	if (data >= 1)
123		flag += 0x20;
124	hwsq_cmd(hwsq, 1, (u8[]){ flag });
125}
126
127void
128nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data)
129{
130	nvkm_debug(hwsq->subdev, " WAIT[%02x] = %d\n", flag, data);
131	hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data });
132}
133
134void
135nvkm_hwsq_wait_vblank(struct nvkm_hwsq *hwsq)
136{
137	struct nvkm_subdev *subdev = hwsq->subdev;
138	struct nvkm_device *device = subdev->device;
139	u32 heads, x, y, px = 0;
140	int i, head_sync;
141
142	heads = nvkm_rd32(device, 0x610050);
143	for (i = 0; i < 2; i++) {
144		/* Heuristic: sync to head with biggest resolution */
145		if (heads & (2 << (i << 3))) {
146			x = nvkm_rd32(device, 0x610b40 + (0x540 * i));
147			y = (x & 0xffff0000) >> 16;
148			x &= 0x0000ffff;
149			if ((x * y) > px) {
150				px = (x * y);
151				head_sync = i;
152			}
153		}
154	}
155
156	if (px == 0) {
157		nvkm_debug(subdev, "WAIT VBLANK !NO ACTIVE HEAD\n");
158		return;
159	}
160
161	nvkm_debug(subdev, "WAIT VBLANK HEAD%d\n", head_sync);
162	nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x0);
163	nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x1);
164}
165
166void
167nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec)
168{
169	u8 shift = 0, usec = nsec / 1000;
170	while (usec & ~3) {
171		usec >>= 2;
172		shift++;
173	}
174
175	nvkm_debug(hwsq->subdev, "    DELAY = %d ns\n", nsec);
176	hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec });
177}