86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
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/*
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* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <subdev/privring.h>
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#include <subdev/timer.h>
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static void
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gk20a_privring_init_privring_ring(struct nvkm_subdev *privring)
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{
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struct nvkm_device *device = privring->device;
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nvkm_mask(device, 0x137250, 0x3f, 0);
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nvkm_mask(device, 0x000200, 0x20, 0);
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udelay(20);
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nvkm_mask(device, 0x000200, 0x20, 0x20);
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nvkm_wr32(device, 0x12004c, 0x4);
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nvkm_wr32(device, 0x122204, 0x2);
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nvkm_rd32(device, 0x122204);
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/*
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* Bug: increase clock timeout to avoid operation failure at high
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* gpcclk rate.
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*/
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nvkm_wr32(device, 0x122354, 0x800);
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nvkm_wr32(device, 0x128328, 0x800);
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nvkm_wr32(device, 0x124320, 0x800);
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}
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static void
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gk20a_privring_intr(struct nvkm_subdev *privring)
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{
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struct nvkm_device *device = privring->device;
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u32 status0 = nvkm_rd32(device, 0x120058);
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if (status0 & 0x7) {
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nvkm_debug(privring, "resetting privring ring\n");
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gk20a_privring_init_privring_ring(privring);
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}
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/* Acknowledge interrupt */
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nvkm_mask(device, 0x12004c, 0x2, 0x2);
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nvkm_msec(device, 2000,
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if (!(nvkm_rd32(device, 0x12004c) & 0x0000003f))
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break;
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);
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}
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static int
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gk20a_privring_init(struct nvkm_subdev *privring)
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{
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gk20a_privring_init_privring_ring(privring);
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return 0;
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}
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static const struct nvkm_subdev_func
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gk20a_privring = {
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.init = gk20a_privring_init,
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.intr = gk20a_privring_intr,
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};
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int
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gk20a_privring_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_subdev **pprivring)
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{
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return nvkm_subdev_new_(&gk20a_privring, device, type, inst, pprivring);
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}
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