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/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "priv.h"
#include <subdev/mc.h>
#include <subdev/top.h>
void
nvkm_falcon_load_imem(struct nvkm_falcon *falcon, void *data, u32 start,
u32 size, u16 tag, u8 port, bool secure)
{
if (secure && !falcon->secret) {
nvkm_warn(falcon->user,
"writing with secure tag on a non-secure falcon!\n");
return;
}
falcon->func->load_imem(falcon, data, start, size, tag, port,
secure);
}
void
nvkm_falcon_load_dmem(struct nvkm_falcon *falcon, void *data, u32 start,
u32 size, u8 port)
{
mutex_lock(&falcon->dmem_mutex);
falcon->func->load_dmem(falcon, data, start, size, port);
mutex_unlock(&falcon->dmem_mutex);
}
void
nvkm_falcon_read_dmem(struct nvkm_falcon *falcon, u32 start, u32 size, u8 port,
void *data)
{
mutex_lock(&falcon->dmem_mutex);
falcon->func->read_dmem(falcon, start, size, port, data);
mutex_unlock(&falcon->dmem_mutex);
}
void
nvkm_falcon_bind_context(struct nvkm_falcon *falcon, struct nvkm_memory *inst)
{
if (!falcon->func->bind_context) {
nvkm_error(falcon->user,
"Context binding not supported on this falcon!\n");
return;
}
falcon->func->bind_context(falcon, inst);
}
void
nvkm_falcon_set_start_addr(struct nvkm_falcon *falcon, u32 start_addr)
{
falcon->func->set_start_addr(falcon, start_addr);
}
void
nvkm_falcon_start(struct nvkm_falcon *falcon)
{
falcon->func->start(falcon);
}
int
nvkm_falcon_enable(struct nvkm_falcon *falcon)
{
struct nvkm_device *device = falcon->owner->device;
int ret;
nvkm_mc_enable(device, falcon->owner->type, falcon->owner->inst);
ret = falcon->func->enable(falcon);
if (ret) {
nvkm_mc_disable(device, falcon->owner->type, falcon->owner->inst);
return ret;
}
return 0;
}
void
nvkm_falcon_disable(struct nvkm_falcon *falcon)
{
struct nvkm_device *device = falcon->owner->device;
/* already disabled, return or wait_idle will timeout */
if (!nvkm_mc_enabled(device, falcon->owner->type, falcon->owner->inst))
return;
falcon->func->disable(falcon);
nvkm_mc_disable(device, falcon->owner->type, falcon->owner->inst);
}
int
nvkm_falcon_reset(struct nvkm_falcon *falcon)
{
nvkm_falcon_disable(falcon);
return nvkm_falcon_enable(falcon);
}
int
nvkm_falcon_wait_for_halt(struct nvkm_falcon *falcon, u32 ms)
{
return falcon->func->wait_for_halt(falcon, ms);
}
int
nvkm_falcon_clear_interrupt(struct nvkm_falcon *falcon, u32 mask)
{
return falcon->func->clear_interrupt(falcon, mask);
}
static int
nvkm_falcon_oneinit(struct nvkm_falcon *falcon)
{
const struct nvkm_falcon_func *func = falcon->func;
const struct nvkm_subdev *subdev = falcon->owner;
u32 reg;
if (!falcon->addr) {
falcon->addr = nvkm_top_addr(subdev->device, subdev->type, subdev->inst);
if (WARN_ON(!falcon->addr))
return -ENODEV;
}
reg = nvkm_falcon_rd32(falcon, 0x12c);
falcon->version = reg & 0xf;
falcon->secret = (reg >> 4) & 0x3;
falcon->code.ports = (reg >> 8) & 0xf;
falcon->data.ports = (reg >> 12) & 0xf;
reg = nvkm_falcon_rd32(falcon, 0x108);
falcon->code.limit = (reg & 0x1ff) << 8;
falcon->data.limit = (reg & 0x3fe00) >> 1;
if (func->debug) {
u32 val = nvkm_falcon_rd32(falcon, func->debug);
falcon->debug = (val >> 20) & 0x1;
}
return 0;
}
void
nvkm_falcon_put(struct nvkm_falcon *falcon, const struct nvkm_subdev *user)
{
if (unlikely(!falcon))
return;
mutex_lock(&falcon->mutex);
if (falcon->user == user) {
nvkm_debug(falcon->user, "released %s falcon\n", falcon->name);
falcon->user = NULL;
}
mutex_unlock(&falcon->mutex);
}
int
nvkm_falcon_get(struct nvkm_falcon *falcon, const struct nvkm_subdev *user)
{
int ret = 0;
mutex_lock(&falcon->mutex);
if (falcon->user) {
nvkm_error(user, "%s falcon already acquired by %s!\n",
falcon->name, falcon->user->name);
mutex_unlock(&falcon->mutex);
return -EBUSY;
}
nvkm_debug(user, "acquired %s falcon\n", falcon->name);
if (!falcon->oneinit)
ret = nvkm_falcon_oneinit(falcon);
falcon->user = user;
mutex_unlock(&falcon->mutex);
return ret;
}
void
nvkm_falcon_dtor(struct nvkm_falcon *falcon)
{
}
int
nvkm_falcon_ctor(const struct nvkm_falcon_func *func,
struct nvkm_subdev *subdev, const char *name, u32 addr,
struct nvkm_falcon *falcon)
{
falcon->func = func;
falcon->owner = subdev;
falcon->name = name;
falcon->addr = addr;
mutex_init(&falcon->mutex);
mutex_init(&falcon->dmem_mutex);
return 0;
}
void
nvkm_falcon_del(struct nvkm_falcon **pfalcon)
{
if (*pfalcon) {
nvkm_falcon_dtor(*pfalcon);
kfree(*pfalcon);
*pfalcon = NULL;
}
}
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