Release 4.7 drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.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 <core/option.h>
#include <subdev/top.h>
void
nvkm_mc_unk260(struct nvkm_mc *mc, u32 data)
{
if (mc->func->unk260)
mc->func->unk260(mc, data);
}
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void
nvkm_mc_intr_unarm(struct nvkm_mc *mc)
{
return mc->func->intr_unarm(mc);
}
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void
nvkm_mc_intr_rearm(struct nvkm_mc *mc)
{
return mc->func->intr_rearm(mc);
}
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static u32
nvkm_mc_intr_mask(struct nvkm_mc *mc)
{
u32 intr = mc->func->intr_mask(mc);
if (WARN_ON_ONCE(intr == 0xffffffff))
intr = 0; /* likely fallen off the bus */
return intr;
}
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void
nvkm_mc_intr(struct nvkm_mc *mc, bool *handled)
{
struct nvkm_device *device = mc->subdev.device;
struct nvkm_subdev *subdev;
const struct nvkm_mc_map *map = mc->func->intr;
u32 stat, intr = nvkm_mc_intr_mask(mc);
u64 subdevs;
stat = nvkm_top_intr(device->top, intr, &subdevs);
while (subdevs) {
enum nvkm_devidx subidx = __ffs64(subdevs);
subdev = nvkm_device_subdev(device, subidx);
if (subdev)
nvkm_subdev_intr(subdev);
subdevs &= ~BIT_ULL(subidx);
}
while (map->stat) {
if (intr & map->stat) {
subdev = nvkm_device_subdev(device, map->unit);
if (subdev)
nvkm_subdev_intr(subdev);
stat &= ~map->stat;
}
map++;
}
if (stat)
nvkm_error(&mc->subdev, "intr %08x\n", stat);
*handled = intr != 0;
}
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static void
nvkm_mc_reset_(struct nvkm_mc *mc, enum nvkm_devidx devidx)
{
struct nvkm_device *device = mc->subdev.device;
const struct nvkm_mc_map *map;
u64 pmc_enable;
if (!(pmc_enable = nvkm_top_reset(device->top, devidx))) {
for (map = mc->func->reset; map && map->stat; map++) {
if (map->unit == devidx) {
pmc_enable = map->stat;
break;
}
}
}
if (pmc_enable) {
nvkm_mask(device, 0x000200, pmc_enable, 0x00000000);
nvkm_mask(device, 0x000200, pmc_enable, pmc_enable);
nvkm_rd32(device, 0x000200);
}
}
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void
nvkm_mc_reset(struct nvkm_mc *mc, enum nvkm_devidx devidx)
{
if (likely(mc))
nvkm_mc_reset_(mc, devidx);
}
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static int
nvkm_mc_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_mc *mc = nvkm_mc(subdev);
nvkm_mc_intr_unarm(mc);
return 0;
}
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static int
nvkm_mc_init(struct nvkm_subdev *subdev)
{
struct nvkm_mc *mc = nvkm_mc(subdev);
if (mc->func->init)
mc->func->init(mc);
nvkm_mc_intr_rearm(mc);
return 0;
}
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static void *
nvkm_mc_dtor(struct nvkm_subdev *subdev)
{
return nvkm_mc(subdev);
}
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static const struct nvkm_subdev_func
nvkm_mc = {
.dtor = nvkm_mc_dtor,
.init = nvkm_mc_init,
.fini = nvkm_mc_fini,
};
int
nvkm_mc_new_(const struct nvkm_mc_func *func, struct nvkm_device *device,
int index, struct nvkm_mc **pmc)
{
struct nvkm_mc *mc;
if (!(mc = *pmc = kzalloc(sizeof(*mc), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_mc, device, index, &mc->subdev);
mc->func = func;
return 0;
}
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