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/*
* 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>
static inline void
nouveau_mc_unk260(struct nouveau_mc *pmc, u32 data)
{
const struct nouveau_mc_oclass *impl = (void *)nv_oclass(pmc);
if (impl->unk260)
impl->unk260(pmc, data);
}
static inline u32
nouveau_mc_intr_mask(struct nouveau_mc *pmc)
{
u32 intr = nv_rd32(pmc, 0x000100);
if (intr == 0xffffffff) /* likely fallen off the bus */
intr = 0x00000000;
return intr;
}
static irqreturn_t
nouveau_mc_intr(int irq, void *arg)
{
struct nouveau_mc *pmc = arg;
const struct nouveau_mc_oclass *oclass = (void *)nv_object(pmc)->oclass;
const struct nouveau_mc_intr *map = oclass->intr;
struct nouveau_subdev *unit;
u32 intr;
nv_wr32(pmc, 0x000140, 0x00000000);
nv_rd32(pmc, 0x000140);
intr = nouveau_mc_intr_mask(pmc);
if (pmc->use_msi)
oclass->msi_rearm(pmc);
if (intr) {
u32 stat = intr = nouveau_mc_intr_mask(pmc);
while (map->stat) {
if (intr & map->stat) {
unit = nouveau_subdev(pmc, map->unit);
if (unit && unit->intr)
unit->intr(unit);
stat &= ~map->stat;
}
map++;
}
if (stat)
nv_error(pmc, "unknown intr 0x%08x\n", stat);
}
nv_wr32(pmc, 0x000140, 0x00000001);
return intr ? IRQ_HANDLED : IRQ_NONE;
}
int
_nouveau_mc_fini(struct nouveau_object *object, bool suspend)
{
struct nouveau_mc *pmc = (void *)object;
nv_wr32(pmc, 0x000140, 0x00000000);
return nouveau_subdev_fini(&pmc->base, suspend);
}
int
_nouveau_mc_init(struct nouveau_object *object)
{
struct nouveau_mc *pmc = (void *)object;
int ret = nouveau_subdev_init(&pmc->base);
if (ret)
return ret;
nv_wr32(pmc, 0x000140, 0x00000001);
return 0;
}
void
_nouveau_mc_dtor(struct nouveau_object *object)
{
struct nouveau_device *device = nv_device(object);
struct nouveau_mc *pmc = (void *)object;
free_irq(pmc->irq, pmc);
if (pmc->use_msi)
pci_disable_msi(device->pdev);
nouveau_subdev_destroy(&pmc->base);
}
int
nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
struct nouveau_oclass *bclass, int length, void **pobject)
{
const struct nouveau_mc_oclass *oclass = (void *)bclass;
struct nouveau_device *device = nv_device(parent);
struct nouveau_mc *pmc;
int ret;
ret = nouveau_subdev_create_(parent, engine, bclass, 0, "PMC",
"master", length, pobject);
pmc = *pobject;
if (ret)
return ret;
pmc->unk260 = nouveau_mc_unk260;
if (nv_device_is_pci(device)) {
switch (device->pdev->device & 0x0ff0) {
case 0x00f0:
case 0x02e0:
/* BR02? NFI how these would be handled yet exactly */
break;
default:
switch (device->chipset) {
case 0xaa:
/* reported broken, nv also disable it */
break;
default:
pmc->use_msi = true;
break;
}
}
pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI",
pmc->use_msi);
if (pmc->use_msi && oclass->msi_rearm) {
pmc->use_msi = pci_enable_msi(device->pdev) == 0;
if (pmc->use_msi) {
nv_info(pmc, "MSI interrupts enabled\n");
oclass->msi_rearm(pmc);
}
} else {
pmc->use_msi = false;
}
}
ret = nv_device_get_irq(device, true);
if (ret < 0)
return ret;
pmc->irq = ret;
ret = request_irq(pmc->irq, nouveau_mc_intr, IRQF_SHARED, "nouveau",
pmc);
if (ret < 0)
return ret;
return 0;
}
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