drivers/gpu/drm/nouveau/nvkm/subdev/bus/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
  26 struct 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
  36 static void
  37 hwsq_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
  43 int
  44 nvkm_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
  60 int
  61 nvkm_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
  90 void
  91 nvkm_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
 115 void
 116 nvkm_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
 127 void
 128 nvkm_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
 134 void
 135 nvkm_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
 166 void
 167 nvkm_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 }