cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/timer/nv04.c

/*
 * Copyright 2012 Red Hat Inc.
 *
 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Ben Skeggs
 */
#include "priv.h"
#include "regsnv04.h"


void nv04_timer_time(struct nvkm_timer *tmr, u64 time) { struct nvkm_subdev *subdev = &tmr->subdev; struct nvkm_device *device = subdev->device; u32 hi = upper_32_bits(time); u32 lo = lower_32_bits(time); nvkm_debug(subdev, "time low : %08x\n", lo); nvkm_debug(subdev, "time high : %08x\n", hi); nvkm_wr32(device, NV04_PTIMER_TIME_1, hi); nvkm_wr32(device, NV04_PTIMER_TIME_0, lo); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs84100.00%1100.00%
Total84100.00%1100.00%


u64 nv04_timer_read(struct nvkm_timer *tmr) { struct nvkm_device *device = tmr->subdev.device; u32 hi, lo; do { hi = nvkm_rd32(device, NV04_PTIMER_TIME_1); lo = nvkm_rd32(device, NV04_PTIMER_TIME_0); } while (hi != nvkm_rd32(device, NV04_PTIMER_TIME_1)); return ((u64)hi << 32 | lo); }

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PersonTokensPropCommitsCommitProp
Ben Skeggs71100.00%4100.00%
Total71100.00%4100.00%


void nv04_timer_alarm_fini(struct nvkm_timer *tmr) { struct nvkm_device *device = tmr->subdev.device; nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000000); }

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PersonTokensPropCommitsCommitProp
Ben Skeggs30100.00%4100.00%
Total30100.00%4100.00%


void nv04_timer_alarm_init(struct nvkm_timer *tmr, u32 time) { struct nvkm_device *device = tmr->subdev.device; nvkm_wr32(device, NV04_PTIMER_ALARM_0, time); nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000001); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs2764.29%480.00%
Martin Peres1535.71%120.00%
Total42100.00%5100.00%


void nv04_timer_intr(struct nvkm_timer *tmr) { struct nvkm_subdev *subdev = &tmr->subdev; struct nvkm_device *device = subdev->device; u32 stat = nvkm_rd32(device, NV04_PTIMER_INTR_0); if (stat & 0x00000001) { nvkm_timer_alarm_trigger(tmr); nvkm_wr32(device, NV04_PTIMER_INTR_0, 0x00000001); stat &= ~0x00000001; } if (stat) { nvkm_error(subdev, "intr %08x\n", stat); nvkm_wr32(device, NV04_PTIMER_INTR_0, stat); } }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs8998.89%583.33%
Martin Peres11.11%116.67%
Total90100.00%6100.00%


static void nv04_timer_init(struct nvkm_timer *tmr) { struct nvkm_subdev *subdev = &tmr->subdev; struct nvkm_device *device = subdev->device; u32 f = 0; /*XXX: nvclk */ u32 n, d; /* aim for 31.25MHz, which gives us nanosecond timestamps */ d = 1000000 / 32; n = f; if (!f) { n = nvkm_rd32(device, NV04_PTIMER_NUMERATOR); d = nvkm_rd32(device, NV04_PTIMER_DENOMINATOR); if (!n || !d) { n = 1; d = 1; } nvkm_warn(subdev, "unknown input clock freq\n"); } /* reduce ratio to acceptable values */ while (((n % 5) == 0) && ((d % 5) == 0)) { n /= 5; d /= 5; } while (((n % 2) == 0) && ((d % 2) == 0)) { n /= 2; d /= 2; } while (n > 0xffff || d > 0xffff) { n >>= 1; d >>= 1; } nvkm_debug(subdev, "input frequency : %dHz\n", f); nvkm_debug(subdev, "numerator : %08x\n", n); nvkm_debug(subdev, "denominator : %08x\n", d); nvkm_debug(subdev, "timer frequency : %dHz\n", f * d / n); nvkm_wr32(device, NV04_PTIMER_NUMERATOR, n); nvkm_wr32(device, NV04_PTIMER_DENOMINATOR, d); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs245100.00%7100.00%
Total245100.00%7100.00%

static const struct nvkm_timer_func nv04_timer = { .init = nv04_timer_init, .intr = nv04_timer_intr, .read = nv04_timer_read, .time = nv04_timer_time, .alarm_init = nv04_timer_alarm_init, .alarm_fini = nv04_timer_alarm_fini, };
int nv04_timer_new(struct nvkm_device *device, int index, struct nvkm_timer **ptmr) { return nvkm_timer_new_(&nv04_timer, device, index, ptmr); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs32100.00%1100.00%
Total32100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs62197.18%1083.33%
Martin Peres182.82%216.67%
Total639100.00%12100.00%
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