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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>
void
nvkm_mc_unk260(struct nvkm_mc *mc, u32 data)
{
if (mc->func->unk260)
mc->func->unk260(mc, data);
}
void
nvkm_mc_intr_unarm(struct nvkm_mc *mc)
{
return mc->func->intr_unarm(mc);
}
void
nvkm_mc_intr_rearm(struct nvkm_mc *mc)
{
return mc->func->intr_rearm(mc);
}
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;
}
static irqreturn_t
nvkm_mc_intr(int irq, void *arg)
{
struct nvkm_mc *mc = arg;
struct nvkm_subdev *subdev = &mc->subdev;
struct nvkm_device *device = subdev->device;
const struct nvkm_mc_intr *map = mc->func->intr;
struct nvkm_subdev *unit;
u32 intr;
nvkm_mc_intr_unarm(mc);
intr = nvkm_mc_intr_mask(mc);
if (mc->use_msi)
mc->func->msi_rearm(mc);
if (intr) {
u32 stat = intr = nvkm_mc_intr_mask(mc);
while (map->stat) {
if (intr & map->stat) {
unit = nvkm_device_subdev(device, map->unit);
if (unit)
nvkm_subdev_intr(unit);
stat &= ~map->stat;
}
map++;
}
if (stat)
nvkm_error(subdev, "unknown intr %08x\n", stat);
}
nvkm_mc_intr_rearm(mc);
return intr ? IRQ_HANDLED : IRQ_NONE;
}
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;
}
static int
nvkm_mc_oneinit(struct nvkm_subdev *subdev)
{
struct nvkm_mc *mc = nvkm_mc(subdev);
return request_irq(mc->irq, nvkm_mc_intr, IRQF_SHARED, "nvkm", mc);
}
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;
}
static void *
nvkm_mc_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_mc *mc = nvkm_mc(subdev);
struct nvkm_device *device = mc->subdev.device;
free_irq(mc->irq, mc);
if (mc->use_msi)
pci_disable_msi(device->pdev);
return mc;
}
static const struct nvkm_subdev_func
nvkm_mc = {
.dtor = nvkm_mc_dtor,
.oneinit = nvkm_mc_oneinit,
.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;
int ret;
if (!(mc = *pmc = kzalloc(sizeof(*mc), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_mc, device, index, 0, &mc->subdev);
mc->func = func;
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:
mc->use_msi = true;
break;
}
}
mc->use_msi = nvkm_boolopt(device->cfgopt, "NvMSI",
mc->use_msi);
if (mc->use_msi && mc->func->msi_rearm) {
mc->use_msi = pci_enable_msi(device->pdev) == 0;
if (mc->use_msi) {
nvkm_debug(&mc->subdev, "MSI enabled\n");
mc->func->msi_rearm(mc);
}
} else {
mc->use_msi = false;
}
}
ret = nv_device_get_irq(device, true);
if (ret < 0)
return ret;
mc->irq = ret;
return 0;
}
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