diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c new file mode 100644 index 000000000000..55e4a60d8770 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/privring/gk20a.c @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2014, 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 <subdev/privring.h> +#include <subdev/timer.h> + +static void +gk20a_privring_init_privring_ring(struct nvkm_subdev *privring) +{ + struct nvkm_device *device = privring->device; + nvkm_mask(device, 0x137250, 0x3f, 0); + + nvkm_mask(device, 0x000200, 0x20, 0); + udelay(20); + nvkm_mask(device, 0x000200, 0x20, 0x20); + + nvkm_wr32(device, 0x12004c, 0x4); + nvkm_wr32(device, 0x122204, 0x2); + nvkm_rd32(device, 0x122204); + + /* + * Bug: increase clock timeout to avoid operation failure at high + * gpcclk rate. + */ + nvkm_wr32(device, 0x122354, 0x800); + nvkm_wr32(device, 0x128328, 0x800); + nvkm_wr32(device, 0x124320, 0x800); +} + +static void +gk20a_privring_intr(struct nvkm_subdev *privring) +{ + struct nvkm_device *device = privring->device; + u32 status0 = nvkm_rd32(device, 0x120058); + + if (status0 & 0x7) { + nvkm_debug(privring, "resetting privring ring\n"); + gk20a_privring_init_privring_ring(privring); + } + + /* Acknowledge interrupt */ + nvkm_mask(device, 0x12004c, 0x2, 0x2); + nvkm_msec(device, 2000, + if (!(nvkm_rd32(device, 0x12004c) & 0x0000003f)) + break; + ); +} + +static int +gk20a_privring_init(struct nvkm_subdev *privring) +{ + gk20a_privring_init_privring_ring(privring); + return 0; +} + +static const struct nvkm_subdev_func +gk20a_privring = { + .init = gk20a_privring_init, + .intr = gk20a_privring_intr, +}; + +int +gk20a_privring_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, + struct nvkm_subdev **pprivring) +{ + return nvkm_subdev_new_(&gk20a_privring, device, type, inst, pprivring); +} |