subdev/bus/hwsq.c

0001 /*
0002  * Copyright 2013 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs <bskeggs@redhat.com>
0023  */
0024 #include "priv.h"
0025
0026 struct nvkm_hwsq {
0027     struct nvkm_subdev *subdev;
0028     u32 addr;
0029     u32 data;
0030     struct {
0031         u8 data[512];
0032         u16 size;
0033     } c;
0034 };
0035
0036 static void
0037 hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[])
0038 {
0039     memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0]));
0040     hwsq->c.size += size;
0041 }
0042
0043 int
0044 nvkm_hwsq_init(struct nvkm_subdev *subdev, struct nvkm_hwsq **phwsq)
0045 {
0046     struct nvkm_hwsq *hwsq;
0047
0048     hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL);
0049     if (hwsq) {
0050         hwsq->subdev = subdev;
0051         hwsq->addr = ~0;
0052         hwsq->data = ~0;
0053         memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data));
0054         hwsq->c.size = 0;
0055     }
0056
0057     return hwsq ? 0 : -ENOMEM;
0058 }
0059
0060 int
0061 nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
0062 {
0063     struct nvkm_hwsq *hwsq = *phwsq;
0064     int ret = 0, i;
0065     if (hwsq) {
0066         struct nvkm_subdev *subdev = hwsq->subdev;
0067         struct nvkm_bus *bus = subdev->device->bus;
0068         hwsq->c.size = (hwsq->c.size + 4) / 4;
0069         if (hwsq->c.size <= bus->func->hwsq_size) {
0070             if (exec)
0071                 ret = bus->func->hwsq_exec(bus,
0072                                (u32 *)hwsq->c.data,
0073                                   hwsq->c.size);
0074             if (ret)
0075                 nvkm_error(subdev, "hwsq exec failed: %d\n", ret);
0076         } else {
0077             nvkm_error(subdev, "hwsq ucode too large\n");
0078             ret = -ENOSPC;
0079         }
0080
0081         for (i = 0; ret && i < hwsq->c.size; i++)
0082             nvkm_error(subdev, "\t%08x\n", ((u32 *)hwsq->c.data)[i]);
0083
0084         *phwsq = NULL;
0085         kfree(hwsq);
0086     }
0087     return ret;
0088 }
0089
0090 void
0091 nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
0092 {
0093     nvkm_debug(hwsq->subdev, "R[%06x] = %08x\n", addr, data);
0094
0095     if (hwsq->data != data) {
0096         if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) {
0097             hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8,
0098                           data >> 16, data >> 24 });
0099         } else {
0100             hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 });
0101         }
0102     }
0103
0104     if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) {
0105         hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8,
0106                       addr >> 16, addr >> 24 });
0107     } else {
0108         hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 });
0109     }
0110
0111     hwsq->addr = addr;
0112     hwsq->data = data;
0113 }
0114
0115 void
0116 nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
0117 {
0118     nvkm_debug(hwsq->subdev, " FLAG[%02x] = %d\n", flag, data);
0119     flag += 0x80;
0120     if (data >= 0)
0121         flag += 0x20;
0122     if (data >= 1)
0123         flag += 0x20;
0124     hwsq_cmd(hwsq, 1, (u8[]){ flag });
0125 }
0126
0127 void
0128 nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data)
0129 {
0130     nvkm_debug(hwsq->subdev, " WAIT[%02x] = %d\n", flag, data);
0131     hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data });
0132 }
0133
0134 void
0135 nvkm_hwsq_wait_vblank(struct nvkm_hwsq *hwsq)
0136 {
0137     struct nvkm_subdev *subdev = hwsq->subdev;
0138     struct nvkm_device *device = subdev->device;
0139     u32 heads, x, y, px = 0;
0140     int i, head_sync;
0141
0142     heads = nvkm_rd32(device, 0x610050);
0143     for (i = 0; i < 2; i++) {
0144         /* Heuristic: sync to head with biggest resolution */
0145         if (heads & (2 << (i << 3))) {
0146             x = nvkm_rd32(device, 0x610b40 + (0x540 * i));
0147             y = (x & 0xffff0000) >> 16;
0148             x &= 0x0000ffff;
0149             if ((x * y) > px) {
0150                 px = (x * y);
0151                 head_sync = i;
0152             }
0153         }
0154     }
0155
0156     if (px == 0) {
0157         nvkm_debug(subdev, "WAIT VBLANK !NO ACTIVE HEAD\n");
0158         return;
0159     }
0160
0161     nvkm_debug(subdev, "WAIT VBLANK HEAD%d\n", head_sync);
0162     nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x0);
0163     nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x1);
0164 }
0165
0166 void
0167 nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec)
0168 {
0169     u8 shift = 0, usec = nsec / 1000;
0170     while (usec & ~3) {
0171         usec >>= 2;
0172         shift++;
0173     }
0174
0175     nvkm_debug(hwsq->subdev, "    DELAY = %d ns\n", nsec);
0176     hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec });
0177 }